/* roulang page: index */
:root {
    --color-bg:#F7F9FC;
    --color-surface:#FFFFFF;
    --color-soft:#EAF0F5;
    --color-line:#DCE6ED;
    --color-primary:#1E6BB8;
    --color-primary-dark:#145294;
    --color-accent-teal:#24C6B0;
    --color-warm-cta:#F0A92E;
    --color-ink:#16283B;
    --color-muted:#5C6F7E;
    --color-nav-bg:#0A1B2A;
    --color-neon:#39E7C2;
    --color-cta-fg:#101C28;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-btn:10px;
    --shadow-card:0 6px 20px rgba(22,40,59,.07);
    --shadow-card-hover:0 14px 32px rgba(22,40,59,.13);
    --content-width:1280px;
  }
  html { scroll-behavior:smooth; }
  * , *::before, *::after { box-sizing:border-box; }
  body {
    margin:0;
    background:var(--color-bg);
    color:var(--color-ink);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
    font-size:16px;
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
  }
  img { max-width:100%; height:auto; display:block; }
  a { color:inherit; text-decoration:none; }
  button { font-family:inherit; }
  h1,h2,h3,h4,p { margin:0; }
  ul,ol { margin:0; padding:0; list-style:none; }

  .site-wrap { overflow:hidden; }
  .container-site {
    max-width:var(--content-width);
    margin:0 auto;
    padding-left:clamp(16px,4vw,36px);
    padding-right:clamp(16px,4vw,36px);
  }
  .section-spacer { padding-block:clamp(58px,8vw,110px); }
  #home-hero { padding-top:clamp(42px,6vw,84px); }
  #home-cta { padding-block:clamp(60px,8vw,110px); }
  section[id] { scroll-margin-top:96px; }

  .section-kicker {
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--color-primary);
    background:#E7F1FA;
    border:1px solid #CFE1F0;
    padding:7px 14px;
    border-radius:999px;
  }
  .section-kicker::before {
    content:"";
    width:6px;height:6px;border-radius:50%;
    background:var(--color-accent-teal);
  }
  .section-title {
    font-size:clamp(1.7rem,3vw,2.45rem);
    line-height:1.25;
    letter-spacing:-.01em;
    margin-top:16px;
    font-weight:800;
    color:var(--color-ink);
  }
  .section-lead {
    max-width:820px;
    margin-top:16px;
    color:var(--color-muted);
    font-size:clamp(.95rem,1.2vw,1.075rem);
  }

  .btn {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:48px;
    padding:0 24px;
    border:none;
    border-radius:var(--radius-btn);
    font-size:15px;
    font-weight:700;
    line-height:1;
    cursor:pointer;
    transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease;
    text-align:center;
  }
  .btn svg, .btn i { pointer-events:none; }
  .btn-warm {
    background:var(--color-warm-cta);
    color:var(--color-cta-fg);
    box-shadow:0 4px 14px rgba(240,169,46,.28);
  }
  .btn-warm:hover {
    background:#F5B748;
    transform:translateY(-3px);
    box-shadow:0 10px 24px rgba(240,169,46,.35);
  }
  .btn-warm:active { transform:translateY(0); }
  .btn-blue {
    background:var(--color-primary);
    color:#fff;
    box-shadow:0 4px 14px rgba(30,107,184,.18);
  }
  .btn-blue:hover {
    background:var(--color-primary-dark);
    transform:translateY(-3px);
    box-shadow:0 10px 24px rgba(30,107,184,.28);
  }
  .btn-blue:active { transform:translateY(0); }
  .btn-ghost-light {
    background:transparent;
    color:#fff;
    border:1px solid rgba(255,255,255,.45);
  }
  .btn-ghost-light:hover {
    background:rgba(255,255,255,.1);
    border-color:rgba(255,255,255,.8);
    transform:translateY(-3px);
  }
  .btn-ghost-blue {
    background:transparent;
    color:var(--color-primary);
    border:1px solid #BBD4E8;
  }
  .btn-ghost-blue:hover {
    border-color:var(--color-primary);
    background:#EDF5FC;
  }
  .btn:focus-visible,
  a:focus-visible,
  summary:focus-visible {
    outline:3px solid rgba(57,231,194,.7);
    outline-offset:3px;
  }

  .site-header {
    position:sticky;
    top:0;
    z-index:60;
    background:var(--color-nav-bg);
    box-shadow:0 8px 30px rgba(10,27,42,.18);
  }
  .site-header::before {
    content:"";
    display:block;
    height:2px;
    background:linear-gradient(90deg,transparent 0%,var(--color-neon) 22%,#18D3F0 55%,transparent 100%);
  }
  .navbar-height { height:74px; }
  .navbar {
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:74px;
    gap:20px;
  }
  .brand {
    display:inline-flex;
    align-items:baseline;
    color:#fff;
    gap:2px;
    font-weight:900;
    font-size:24px;
    letter-spacing:-.01em;
    white-space:nowrap;
  }
  .brand .brand-accent {
    color:var(--color-neon);
  }
  .brand-pill {
    margin-left:8px;
    font-size:11px;
    font-weight:400;
    color:rgba(255,255,255,.7);
    border:1px solid rgba(255,255,255,.25);
    border-radius:999px;
    padding:2px 8px;
    line-height:1.4;
  }
  .nav-links {
    display:none;
    align-items:center;
    gap:4px;
    margin-left:44px;
  }
  .nav-item { position:relative; }
  .nav-item > .nav-link, .dropdown-title {
    display:inline-flex;
    align-items:center;
    gap:5px;
    padding:10px 14px;
    color:rgba(255,255,255,.78);
    font-size:15px;
    font-weight:600;
    border-radius:8px;
    transition:color .15s ease,background .15s ease;
    border-bottom:2px solid transparent;
  }
  .nav-item > .nav-link:hover,
  .dropdown-title:hover {
    color:#fff;
    background:rgba(57,231,194,.08);
  }
  .nav-item.is-active > .nav-link {
    color:#fff;
    border-bottom-color:var(--color-neon);
    box-shadow:0 7px 16px -12px var(--color-neon);
  }
  .dropdown-panel {
    position:absolute;
    top:calc(100% + 16px);
    left:6px;
    min-width:224px;
    background:#0E2435;
    border:1px solid rgba(255,255,255,.1);
    border-top:2px solid var(--color-neon);
    border-radius:12px;
    box-shadow:0 18px 40px rgba(0,0,0,.28);
    padding:10px;
    opacity:0;
    visibility:hidden;
    transform:translateY(8px);
    transition:opacity .18s ease,visibility .18s ease,transform .18s ease;
  }
  .has-dropdown:hover .dropdown-panel,
  .has-dropdown:focus-within .dropdown-panel {
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .dropdown-panel a {
    display:block;
    padding:11px 14px;
    border-radius:8px;
    color:rgba(255,255,255,.83);
    font-size:14px;
    line-height:1.5;
    transition:background .15s,color .15s;
  }
  .dropdown-panel a:hover {
    background:rgba(57,231,194,.1);
    color:#fff;
  }
  .dropdown-panel a small {
    display:block;
    font-size:12px;
    color:rgba(255,255,255,.46);
    font-weight:400;
    margin-top:2px;
  }
  .nav-right { display:flex; align-items:center; gap:12px; }
  .nav-contact {
    display:none;
  }

  .mobile-toggle {
    width:44px;
    height:44px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid rgba(255,255,255,.18);
    border-radius:10px;
    background:rgba(255,255,255,.04);
    color:#fff;
    cursor:pointer;
  }
  .mobile-toggle span, .mobile-toggle span::before, .mobile-toggle span::after {
    content:"";
    display:block;
    width:20px;
    height:2px;
    background:#fff;
    border-radius:2px;
    transition:.25s;
    position:relative;
  }
  .mobile-toggle span::before { position:absolute; top:-6px; }
  .mobile-toggle span::after { position:absolute; top:6px; }
  .mobile-toggle[aria-expanded="true"] span { background:transparent; }
  .mobile-toggle[aria-expanded="true"] span::before { top:0; transform:rotate(45deg); }
  .mobile-toggle[aria-expanded="true"] span::after { top:0; transform:rotate(-45deg); }

  .mobile-menu {
    position:fixed;
    top:76px;
    left:0;
    right:0;
    bottom:0;
    background:#0B1E2E;
    box-shadow:0 20px 60px rgba(0,0,0,.3);
    overflow-y:auto;
    visibility:hidden;
    opacity:0;
    transform:translateY(-8px);
    transition:.25s ease;
    padding:22px 20px 50px;
    z-index:59;
  }
  .mobile-menu.is-open {
    visibility:visible;
    opacity:1;
    transform:translateY(0);
  }
  .mobile-menu .m-title {
    font-size:13px;
    color:rgba(255,255,255,.4);
    letter-spacing:.12em;
    padding:8px 6px 8px;
  }
  .mobile-menu a.m-link, .mobile-menu .m-subtitle {
    display:block;
    padding:16px 8px;
    color:#fff;
    font-size:17px;
    font-weight:700;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .mobile-menu a.m-link.with-neon { color:var(--color-neon); }
  .mobile-panel-cats { padding-left:18px; }
  .mobile-panel-cats a {
    padding:14px 8px;
    border-bottom:1px solid rgba(255,255,255,.05);
    color:rgba(255,255,255,.82);
    font-size:15px;
  }
  .mobile-menu .btn { width:100%; margin-top:24px; }

  .hero-area {
    display:grid;
    grid-template-columns:1fr;
    gap:44px;
    align-items:center;
  }
  .hero-eyebrow {
    display:inline-flex;
    align-items:center;
    gap:8px;
    background:#E8F2FB;
    border:1px solid #D5E6F3;
    color:var(--color-primary);
    padding:8px 16px;
    border-radius:999px;
    font-size:13px;
    font-weight:700;
  }
  .hero-title {
    font-size:clamp(1.85rem,4vw,3.2rem);
    line-height:1.28;
    letter-spacing:-.02em;
    font-weight:900;
    color:var(--color-ink);
    margin-top:20px;
  }
  .hero-title mark {
    background:linear-gradient(120deg, rgba(57,231,194,.28) 0%, rgba(36,198,176,.22) 90%);
    padding:0 .12em;
    color:inherit;
    border-radius:6px;
  }
  .hero-desc {
    margin-top:22px;
    max-width:620px;
    font-size:clamp(.98rem,1.2vw,1.12rem);
    color:var(--color-muted);
  }
  .hero-metrics {
    display:flex;
    flex-wrap:wrap;
    gap:12px 28px;
    margin-top:26px;
  }
  .hero-metrics li {
    display:flex;
    align-items:center;
    gap:8px;
    color:var(--color-ink);
    font-size:14px;
    font-weight:600;
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:999px;
    padding:8px 16px;
  }
  .hero-metrics li::before {
    content:"";
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--color-accent-teal);
    flex:none;
  }
  .hero-actions { display:flex; flex-wrap:wrap; gap:14px; margin-top:32px; }
  .hero-visual {
    position:relative;
    border-radius:24px;
    overflow:hidden;
    background:var(--color-soft);
    box-shadow:0 26px 60px rgba(22,54,76,.16);
  }
  .hero-visual img { width:100%; height:100%; object-fit:cover; aspect-ratio:5/4; }
  .hero-float-card {
    position:absolute;
    left:18px;
    bottom:18px;
    right:18px;
    background:rgba(255,255,255,.9);
    backdrop-filter:blur(12px);
    border:1px solid rgba(255,255,255,.7);
    border-radius:16px;
    padding:14px 18px;
    box-shadow:0 10px 30px rgba(0,0,0,.18);
  }
  .hero-float-card strong { color:var(--color-ink); font-size:15px; }
  .hero-float-card p { color:var(--color-muted); font-size:13px; }
  .hero-tag-inline {
    background:var(--color-warm-cta);
    color:var(--color-cta-fg);
    border-radius:5px;
    font-size:12px;
    font-weight:800;
    padding:3px 8px;
    display:inline-block;
    margin-bottom:8px;
  }

  .trust-strip {
    background:#0D2233;
    border-radius:22px;
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:26px 28px;
    padding:36px 38px;
    margin-top:70px;
    box-shadow:0 18px 46px rgba(13,34,51,.18);
  }
  .trust-metric {
    display:flex;
    align-items:flex-start;
    gap:12px;
  }
  .trust-metric .tm-num {
    color:var(--color-neon);
    font-size:clamp(1.4rem,2vw,2rem);
    font-weight:900;
    line-height:1.2;
  }
  .trust-metric .tm-label {
    color:rgba(255,255,255,.85);
    font-size:14px;
    font-weight:600;
  }
  .trust-metric .tm-sub {
    color:rgba(255,255,255,.52);
    font-size:12px;
    margin-top:3px;
  }
  .trust-line {
    grid-column:1/-1;
    color:rgba(255,255,255,.55);
    font-size:14px;
    border-top:1px solid rgba(255,255,255,.09);
    padding-top:22px;
    display:flex;
    flex-wrap:wrap;
    gap:8px 20px;
  }
  .trust-line span { display:inline-flex; align-items:center; gap:7px; }
  .trust-line span::before { content:"✓"; color:var(--color-neon); font-weight:800; }

  .category-grid {
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
    margin-top:44px;
  }
  .cat-card {
    position:relative;
    display:grid;
    grid-template-columns:1fr;
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:18px;
    overflow:hidden;
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .cat-card:hover {
    transform:translateY(-5px);
    box-shadow:var(--shadow-card-hover);
    border-color:#BFD6E9;
  }
  .cat-card .cat-art { background:var(--color-soft); }
  .cat-card .cat-art img { width:100%; height:100%; object-fit:cover; aspect-ratio:4/3; }
  .cat-card .cat-body { padding:24px 24px 28px; display:flex; flex-direction:column; }
  .cat-card .cat-no {
    color:var(--color-primary);
    font-size:12px;
    font-weight:800;
    letter-spacing:.14em;
  }
  .cat-card h3 { font-size:22px; font-weight:800; margin-top:6px; }
  .cat-card .cat-desc { color:var(--color-muted); margin-top:10px; font-size:14px; }
  .cat-card .cat-tags { display:flex; flex-wrap:wrap; gap:8px; margin:18px 0 22px; }
  .cat-tags span {
    background:var(--color-soft);
    color:var(--color-ink);
    border-radius:999px;
    font-size:12px;
    padding:6px 12px;
    font-weight:600;
  }
  .cat-link {
    margin-top:auto;
    align-self:flex-start;
    display:inline-flex;
    align-items:center;
    gap:5px;
    color:var(--color-primary);
    font-size:15px;
    font-weight:700;
  }
  .cat-link::after { content:"→"; transition:transform .2s; }
  .cat-card:hover .cat-link::after { transform:translateX(5px); }

  .prod-grid {
    display:grid;
    grid-template-columns:1fr;
    gap:22px;
    margin-top:44px;
  }
  .prod-card {
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    display:flex;
    flex-direction:column;
    transition:transform .2s,box-shadow .2s,border-color .2s;
  }
  .prod-card:hover {
    transform:translateY(-4px);
    box-shadow:var(--shadow-card-hover);
    border-color:#C4DAEE;
  }
  .prod-thumb {
    position:relative;
    background:var(--color-soft);
    overflow:hidden;
  }
  .prod-thumb img { aspect-ratio:5/4; object-fit:cover; width:100%; }
  .prod-badge {
    position:absolute;
    top:12px;
    left:12px;
    background:rgba(255,255,255,.9);
    color:var(--color-ink);
    border-radius:999px;
    padding:5px 11px;
    font-size:12px;
    font-weight:700;
  }
  .prod-badge.is-hot { background:var(--color-warm-cta); color:var(--color-cta-fg); }
  .prod-body { padding:18px 18px 20px; display:flex; flex-direction:column; flex:1; }
  .prod-cat {
    font-size:12px;
    font-weight:700;
    color:var(--color-primary);
    letter-spacing:.06em;
  }
  .prod-name { font-size:17px; font-weight:800; margin-top:7px; line-height:1.4; }
  .prod-spec {
    color:var(--color-muted);
    font-size:13px;
    margin-top:8px;
    line-height:1.55;
  }
  .prod-rate {
    display:flex;
    align-items:center;
    gap:6px;
    margin-top:10px;
    font-size:12px;
    color:var(--color-muted);
  }
  .star { color:#F0A92E; font-weight:900; font-size:13px; letter-spacing:1px; }
  .prod-row-foot {
    margin-top:18px;
    padding-top:16px;
    border-top:1px solid var(--color-line);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
  }
  .price { color:var(--color-ink); font-weight:900; font-size:21px; }
  .price small { font-size:12px; color:var(--color-muted); font-weight:500; margin-left:2px; }
  .btn-add {
    display:inline-flex;
    align-items:center;
    min-height:42px;
    padding:0 16px;
    border:1px solid transparent;
    border-radius:9px;
    background:var(--color-warm-cta);
    color:var(--color-cta-fg);
    font-weight:800;
    font-size:14px;
    cursor:pointer;
    transition:.2s;
    gap:6px;
  }
  .btn-add:hover { background:#F6BC4D; transform:translateY(-2px); box-shadow:0 9px 20px rgba(240,169,46,.3); }
  .btn-add:active { transform:scale(.97); }
  .btn-add-outline {
    background:transparent;
    border-color:#C6D9E9;
    color:var(--color-primary);
  }
  .btn-add-outline:hover { border-color:var(--color-primary); background:#F1F7FC; }

  .review-strip {
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:24px;
    padding:34px 28px;
    margin-top:32px;
  }
  .review-grid {
    display:grid;
    grid-template-columns:1fr;
    gap:22px;
  }
  .review-card {
    border-left:3px solid var(--color-neon);
    background:var(--color-bg);
    padding:20px 20px;
    border-radius:4px 14px 14px 4px;
    text-align:left;
  }
  .review-card p {
    color:var(--color-muted);
    font-size:14.5px;
    line-height:1.85;
  }
  .review-person { margin-bottom:12px; display:flex; align-items:center; gap:12px; }
  .avatar {
    width:42px;height:42px;border-radius:50%;
    background:var(--color-primary);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:800;
    font-size:15px;
    flex:none;
  }
  .avatar.is-gold { background:var(--color-warm-cta); color:var(--color-cta-fg); }
  .review-person strong { font-size:14px; display:block; }
  .review-person small { color:var(--color-muted); font-size:12px; }
  .review-scene {
    display:inline-flex;
    gap:6px;
    font-size:12px;
    background:#fff;
    border:1px solid var(--color-line);
    padding:5px 10px;
    border-radius:999px;
    color:var(--color-muted);
    margin-right:7px;
    margin-bottom:7px;
    font-weight:600;
  }

  .service-band {
    background:linear-gradient(135deg,#E8F1F9 0%,#F4F9FD 60%);
    border:1px solid #D5E3EE;
    border-radius:22px;
    padding:40px 38px;
    margin-top:44px;
  }
  .service-list {
    display:grid;
    grid-template-columns:1fr;
    gap:30px;
  }
  .service-item {
    display:flex;
    gap:16px;
  }
  .service-icon {
    width:52px;
    height:52px;
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:24px;
  }
  .service-item h3 { font-size:17px; font-weight:800; }
  .service-item p { color:var(--color-muted); font-size:14px; margin-top:6px; }

  .news-block {
    display:grid;
    grid-template-columns:1fr;
    gap:30px;
  }
  .news-aside {
    background:var(--color-nav-bg);
    border-radius:22px;
    padding:34px 30px;
    color:#fff;
    position:relative;
    overflow:hidden;
  }
  .news-aside::after {
    content:"";
    width:200px;height:200px;
    position:absolute;
    right:-70px;top:-70px;
    background:radial-gradient(circle,rgba(57,231,194,.25),transparent 70%);
  }
  .news-aside h2 { font-size:26px; line-height:1.4; font-weight:800; }
  .news-aside h2 span { color:var(--color-neon); }
  .news-aside p { color:rgba(255,255,255,.63); font-size:14px; margin-top:14px; }
  .news-aside .btn { margin-top:24px; }
  .news-list-area { display:flex; flex-direction:column; gap:16px; margin-top:34px; }
  .news-item {
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:16px;
    padding:8px 8px 8px 20px;
    display:grid;
    grid-template-columns:1fr;
    gap:12px;
    align-items:center;
    transition:.2s;
  }
  .news-item:hover { box-shadow:var(--shadow-card-hover); transform:translateY(-3px); border-color:#C3D9EB; }
  .news-item-main { min-width:0; }
  .news-item-main h3 {
    font-size:17px;
    font-weight:800;
    line-height:1.5;
  }
  .news-item-main p {
    color:var(--color-muted);
    font-size:14px;
    margin-top:4px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .news-meta {
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px;
    font-size:12px;
    color:var(--color-muted);
    margin-bottom:10px;
  }
  .text-link {
    display:inline-flex;
    align-items:center;
    color:var(--color-primary);
    font-weight:700;
    font-size:14px;
    gap:5px;
    padding:8px 0;
  }
  .text-link::after { content:"→"; transition:transform .2s; }
  .text-link:hover::after { transform:translateX(4px); }

  .news-empty {
    border:2px dashed #B9CFE2;
    background:#F3F8FC;
    border-radius:18px;
    padding:46px 30px;
    text-align:center;
    color:var(--color-muted);
    font-size:15px;
  }
  .news-empty strong { display:block; color:var(--color-ink); font-size:18px; margin-bottom:8px; }

  .cta-banner {
    background:linear-gradient(120deg,#103451 0%,#135E88 55%,#168fa0 100%);
    border:1px solid rgba(255,255,255,.1);
    box-shadow:0 28px 60px rgba(15,62,91,.27);
    color:#fff;
    border-radius:28px;
    overflow:hidden;
    position:relative;
  }
  .cta-banner:before {
    content:"";
    position:absolute;
    inset:0;
    background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    opacity:.16;
  }
  .cta-inner { position:relative; padding:48px 36px; }
  .cta-kicker { color:var(--color-neon); font-weight:800; font-size:13px; letter-spacing:.14em; }
  .cta-inner h2 {
    max-width:760px;
    font-size:clamp(1.7rem,3vw,2.6rem);
    line-height:1.35;
    margin-top:14px;
    font-weight:900;
  }
  .cta-inner p { max-width:710px; color:rgba(255,255,255,.78); margin-top:16px; font-size:15px; }
  .cta-btns { display:flex; flex-wrap:wrap; gap:14px; margin-top:30px; }
  .cta-btns a { min-height:52px; }

  .faq-list {
    max-width:920px;
    margin:40px auto 0;
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  details.faq-item {
    background:#fff;
    border:1px solid var(--color-line);
    border-radius:14px;
    overflow:hidden;
    transition:border-color .2s;
  }
  details.faq-item[open] { border-color:#AFCBE5; box-shadow:0 8px 22px rgba(30,107,184,.07); }
  .faq-item summary {
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:20px 22px;
    cursor:pointer;
    font-size:16px;
    font-weight:700;
    color:var(--color-ink);
    list-style:none;
  }
  .faq-item summary::-webkit-details-marker { display:none; }
  .faq-item summary::after {
    content:"+";
    width:30px;height:30px;
    border-radius:50%;
    background:var(--color-soft);
    color:var(--color-primary);
    font-size:21px;
    font-weight:400;
    line-height:30px;
    text-align:center;
    flex:none;
    transition:transform .2s,background .2s;
  }
  .faq-item[open] summary::after { transform:rotate(45deg); background:var(--color-primary); color:#fff; }
  .faq-answer { border-top:1px dashed var(--color-line); padding:0 22px 20px; color:var(--color-muted); font-size:15px; }

  .site-footer {
    background:var(--color-nav-bg);
    color:rgba(255,255,255,.75);
    margin-top:0;
  }
  .footer-top {
    padding-top:74px;
    padding-bottom:52px;
  }
  .footer-grid { display:grid; grid-template-columns:1fr; gap:38px; }
  .footer-brand .brand { color:#fff; font-size:26px; }
  .footer-brand p { color:rgba(255,255,255,.55); max-width:360px; font-size:14px; margin-top:16px; }
  .footer-col h3 { color:#fff; font-size:16px; font-weight:800; margin-bottom:16px; }
  .footer-col ul li + li { margin-top:11px; }
  .footer-col ul a { color:rgba(255,255,255,.62); font-size:14px; transition:color .2s; }
  .footer-col ul a:hover { color:var(--color-neon); }
  .footer-contact-list li { font-size:14px; color:rgba(255,255,255,.65); padding-left:18px; position:relative; }
  .footer-contact-list li + li { margin-top:13px; }
  .footer-contact-list li::before { content:"∙"; position:absolute; left:2px; color:var(--color-neon); font-weight:900; }
  .footer-bottom {
    border-top:1px solid rgba(255,255,255,.1);
    padding:24px 0;
    color:rgba(255,255,255,.48);
    font-size:13px;
  }
  .footer-bottom-inner {
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
  }
  .back-top {
    color:rgba(255,255,255,.68);
    display:inline-flex;
    align-items:center;
    gap:6px;
  }
  .back-top:hover { color:var(--color-neon); }

  @media (min-width:560px) {
    .prod-grid { grid-template-columns:repeat(2,1fr); }
    .cat-card { grid-template-columns:1fr 1.4fr; }
    .cat-card .cat-art img { aspect-ratio:auto; height:100%; }
    .trust-strip { grid-template-columns:repeat(4,1fr); }
    .trust-line { grid-column:1/-1; }
  }
  @media (min-width:768px) {
    .service-list { grid-template-columns:repeat(2,1fr); }
    .review-grid { grid-template-columns:repeat(3,1fr); }
    .footer-grid { grid-template-columns:3fr 1.4fr 1.6fr 1.4fr; }
    .news-item {
      grid-template-columns:1fr auto;
      gap:16px;
      padding:16px 16px 16px 22px;
    }
    .category-grid { grid-template-columns:repeat(2,1fr); }
    .cat-card:nth-child(even) { grid-template-columns:1.4fr 1fr; }
    .cat-card:nth-child(even) .cat-art { order:2; }
  }
  @media (min-width:992px) {
    .nav-links { display:flex; flex:1; }
    .nav-contact { display:inline-flex; }
    .mobile-toggle { display:none; }
    .hero-area { grid-template-columns:1.05fr .95fr; }
    .category-grid { grid-template-columns:repeat(2,1fr); }
    .prod-grid { grid-template-columns:repeat(4,1fr); }
    .news-block { grid-template-columns:.9fr 2.1fr; gap:38px; }
    .news-list-area { margin-top:0; }
    .cat-card { grid-template-columns:1fr 1fr; }
  }
  @media (min-width:1040px) {
    .cat-card .cat-art img { aspect-ratio:5/4; }
    .hero-float-card { left:24px; right:24px; }
  }
  @media (max-width:360px) {
    .brand { font-size:20px; }
    .cta-inner { padding:40px 22px; }
  }

/* roulang page: article */
:root{
  --color-bg:#F7F9FC;
  --color-surface:#FFFFFF;
  --color-soft:#EAF0F5;
  --color-line:#DCE6ED;
  --color-primary:#1E6BB8;
  --color-primary-dark:#145294;
  --color-accent-teal:#24C6B0;
  --color-warm-cta:#F0A92E;
  --color-ink:#16283B;
  --color-muted:#5C6F7E;
  --color-nav-bg:#0A1B2A;
  --color-neon:#39E7C2;
  --color-cta-fg:#101C28;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-sm:0 4px 14px rgba(22,40,59,.06);
  --shadow-md:0 14px 34px rgba(16,38,54,.08);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Segoe UI","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  background:var(--color-bg);
  color:var(--color-ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
button{font:inherit;cursor:pointer;border:0;background:none}
ul,ol{list-style:none}
:focus-visible{outline:3px solid rgba(57,231,194,.55);outline-offset:3px;border-radius:4px}
.container-site{max-width:1240px;margin-left:auto;margin-right:auto;padding-left:clamp(20px,4vw,32px);padding-right:clamp(20px,4vw,32px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  min-height:46px;padding:.78rem 1.45rem;border-radius:10px;
  font-size:.95rem;font-weight:600;line-height:1;text-align:center;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border var(--ease);
  white-space:normal;
}
.btn svg{flex:none}
.btn-warm{background:var(--color-warm-cta);color:var(--color-cta-fg);box-shadow:0 8px 20px rgba(240,169,46,.24)}
.btn-warm:hover{background:#ffbe4d;transform:translateY(-2px);box-shadow:0 12px 28px rgba(240,169,46,.34)}
.btn-warm:active{transform:translateY(0)}
.btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 8px 20px rgba(30,107,184,.22)}
.btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.32)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6)}
.btn-lg{min-height:52px;padding:.95rem 1.8rem;font-size:1rem;border-radius:12px}
.btn-sm{min-height:40px;padding:.5rem 1rem;font-size:.88rem}
.text-link{display:inline-flex;align-items:center;gap:.4rem;font-weight:600;color:#fff;border-bottom:1px solid rgba(255,255,255,.55);padding-bottom:2px}
.text-link:hover{color:var(--color-neon);border-color:var(--color-neon)}
.text-link-dark{color:var(--color-primary)}
.text-link-dark:hover{color:var(--color-primary-dark)}

/* 顶部霓虹线 */
.header-glow{
  height:2px;
  background:linear-gradient(90deg,rgba(57,231,194,0) 0%,rgba(57,231,194,.8) 30%,rgba(57,231,194,.9) 55%,rgba(240,169,46,.7) 86%,rgba(240,169,46,0) 100%);
}

/* 全站导航 */
.site-header{
  background:var(--color-nav-bg);
  color:#fff;
  position:relative;
  z-index:50;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
  min-height:72px;
}
.brand{
  flex:none;
  display:inline-flex;
  align-items:baseline;
  gap:2px;
  font-size:1.55rem;
  font-weight:850;
  letter-spacing:.02em;
  color:#fff;
}
.brand .brand-accent{color:var(--color-neon)}
.main-nav .nav-links{display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-link,.dropdown-title{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.52rem .72rem;
  color:rgba(234,240,245,.78);
  font-size:.95rem;
  font-weight:500;
  border-radius:var(--radius-sm);
  transition:color var(--ease);
  min-height:42px;
}
.nav-link svg,.dropdown-title svg{transition:transform var(--ease)}
.nav-link:hover,.dropdown-title:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav-item.is-active .nav-link,
.nav-item.is-active .dropdown-title{
  color:#fff;
  box-shadow:0 2px 0 var(--color-neon),0 0 22px rgba(57,231,194,.16);
}
.nav-link:focus-visible,.dropdown-title:focus-visible{outline-color:rgba(57,231,194,.7)}
.dropdown-title svg{transform:rotate(0)}
.nav-item.has-dropdown:hover .dropdown-title svg{transform:rotate(180deg)}
.dropdown-panel{
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  min-width:252px;
  background:#0E2335;
  border:1px solid rgba(255,255,255,.08);
  border-radius:14px;
  padding:8px;
  box-shadow:0 20px 38px rgba(0,0,0,.28);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
  z-index:80;
}
.nav-item.has-dropdown:hover .dropdown-panel,
.nav-item.has-dropdown:focus-within .dropdown-panel{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.dropdown-panel a{
  display:block;
  padding:.8rem .9rem;
  border-radius:10px;
  color:rgba(255,255,255,.88);
  font-size:.92rem;
  font-weight:600;
  line-height:1.45;
}
.dropdown-panel a:hover{background:rgba(57,231,194,.08);color:var(--color-neon)}
.dropdown-panel small{
  display:block;
  margin-top:2px;
  color:rgba(255,255,255,.5);
  font-weight:400;
  font-size:.78rem;
}
.header-actions{display:flex;align-items:center;gap:10px}
.header-cta{
  background:var(--color-warm-cta);
  color:var(--color-cta-fg);
  min-height:44px;
}
.header-cta:hover{background:#ffbe4d;transform:translateY(-2px)}
.menu-toggle{
  display:none;
  width:44px;height:44px;align-items:center;justify-content:center;
  color:#fff;border-radius:10px;
}
.menu-toggle:hover{background:rgba(255,255,255,.08)}
.menu-toggle .bar{display:block;width:20px;height:2px;background:currentColor;margin:3px auto;transition:transform var(--ease),opacity var(--ease)}
.mobile-drawer-backdrop{
  position:fixed;inset:0;background:rgba(4,12,19,.55);backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s;z-index:99;
}
.mobile-drawer-backdrop.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,350px);
  background:#0B1E2E;border-left:1px solid rgba(255,255,255,.08);
  padding:26px 22px 30px;
  transform:translateX(105%);
  transition:transform .3s ease;
  z-index:102;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.mobile-drawer-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.mobile-drawer-close{width:40px;height:40px;color:#fff}
.mobile-drawer .nav-links{flex-direction:column;align-items:stretch;gap:4px;padding-top:6px}
.mobile-drawer .nav-item.has-dropdown{width:100%}
.mobile-drawer .dropdown-panel{
  position:static;
  opacity:1;visibility:visible;transform:none;
  box-shadow:none;border:0;border-left:1px solid rgba(255,255,255,.08);
  background:transparent;border-radius:0;margin-left:10px;margin-top:6px;
  padding:0 0 4px 10px;
  display:none;
}
.mobile-drawer .nav-item.is-expanded .dropdown-panel{display:block}
.mobile-drawer .dropdown-panel a{padding:.55rem .5rem;color:rgba(255,255,255,.78)}
.mobile-drawer-cta{margin-top:18px;display:block}

/* Footer */
.site-footer{
  background:var(--color-nav-bg);
  color:rgba(255,255,255,.8);
  margin-top:0;
}
.footer-top{padding-top:56px;padding-bottom:40px}
.footer-grid{
  display:grid;
  grid-template-columns:1.9fr 1fr 1fr 1.25fr;
  gap:30px 46px;
}
.footer-brand .brand{font-size:1.5rem;margin-bottom:14px;display:inline-flex}
.footer-brand p{color:rgba(255,255,255,.6);font-size:.9rem;line-height:1.9;max-width:31rem;margin-top:12px}
.footer-col h3{color:#fff;font-size:.95rem;font-weight:650;margin-bottom:16px}
.footer-col li{margin-bottom:9px}
.footer-col a{color:rgba(255,255,255,.68);font-size:.9rem}
.footer-col a:hover{color:var(--color-neon)}
.footer-contact-list li{color:rgba(255,255,255,.62);font-size:.9rem;margin-bottom:10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08)}
.footer-bottom-inner{
  min-height:62px;
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;flex-wrap:wrap;
  color:rgba(255,255,255,.52);
  font-size:.84rem;
}
.back-top{color:rgba(255,255,255,.66);font-weight:500}
.back-top:hover{color:var(--color-neon)}

/* 文章页骨架 */
.article-page-main{
  padding:28px 0 80px;
  overflow:hidden;
}
.breadcrumb-wrap{padding-bottom:14px}
.breadcrumb-list{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:.85rem;color:var(--color-muted);line-height:1.4}
.breadcrumb-list a{color:var(--color-muted)}
.breadcrumb-list a:hover{color:var(--color-primary)}
.breadcrumb-sep{color:#9DAEB9;margin:0 4px}
.breadcrumb-crumb{max-width:30ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--color-ink)}
.article-main-shell{max-width:920px;margin-left:auto;margin-right:auto}
.article-paper{
  background:var(--color-surface);
  border:1px solid rgba(220,230,237,.8);
  border-radius:20px;
  box-shadow:var(--shadow-md);
  padding:clamp(26px,5vw,58px) clamp(20px,4.4vw,52px) 40px;
}
.article-header-row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.article-cat-tag{
  display:inline-flex;align-items:center;gap:.45rem;
  background:var(--color-soft);color:var(--color-primary);
  font-size:.82rem;font-weight:600;
  border:1px solid rgba(30,107,184,.08);
  padding:.38rem .78rem;border-radius:999px;
}
.article-brand-note{color:var(--color-muted);font-size:.8rem;letter-spacing:.02em}
.article-title{
  font-size:clamp(1.9rem,4.5vw,2.75rem);
  line-height:1.3;
  letter-spacing:-.02em;
  font-weight:850;
  color:#10273C;
  text-wrap:balance;
  margin-bottom:18px;
}
.article-lead{
  border-left:3px solid var(--color-primary);
  background:linear-gradient(90deg,rgba(30,107,184,.05),rgba(234,240,245,0) 85%);
  color:#3A5265;
  font-size:1.02rem;
  line-height:1.9;
  padding:.6rem 0 .6rem 1.15rem;
  margin-bottom:20px;
  border-radius:0 8px 8px 0;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1.4rem;
  padding-top:16px;border-top:1px solid var(--color-line);
  font-size:.88rem;color:var(--color-muted);
}
.meta-item{display:inline-flex;align-items:center;gap:.5rem}
.meta-item strong{font-weight:600;color:var(--color-ink);margin-right:.2rem}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#B7C6D1;display:inline-block}
.article-content-cms{
  max-width:720px;
  margin:36px auto 0;
}
.cms-body p{
  font-size:1.02rem;
  line-height:2.05;
  color:#233B4D;
  margin-bottom:1.5rem;
}
.cms-body h2{
  font-size:1.45rem;
  font-weight:750;
  color:var(--color-ink);
  line-height:1.55;
  margin:2.4rem 0 1rem;
  padding-top:.4rem;
}
.cms-body h3{
  font-size:1.18rem;
  font-weight:700;
  color:#1B3A54;
  margin:1.9rem 0 .8rem;
}
.cms-body ul,.cms-body ol{
  margin:1rem 0 1.6rem;
  padding-left:1.2rem;
}
.cms-body ul li{
  position:relative;
  padding-left:1rem;
  margin-bottom:.85rem;
  line-height:1.95;
  color:#2A4255;
  font-size:1rem;
}
.cms-body ul li::before{
  content:"";
  position:absolute;
  left:-.15rem;top:.75em;
  width:.48rem;height:.48rem;
  background:var(--color-accent-teal);
  border-radius:2px;
  transform:rotate(45deg);
}
.cms-body ol{list-style:decimal}
.cms-body ol li{padding-left:.35rem;margin-bottom:.8rem;line-height:1.95}
.cms-body blockquote{
  margin:2rem 0;
  padding:1.2rem 1.5rem;
  border-left:3px solid var(--color-primary);
  background:var(--color-soft);
  border-radius:0 14px 14px 0;
  color:#3E586C;
  font-size:1.02rem;
  line-height:2;
}
.cms-body img{
  border-radius:16px;
  margin:2rem auto;
  box-shadow:var(--shadow-md);
}
.cms-body figure{margin:2rem 0}
.cms-body figcaption{
  color:var(--color-muted);
  font-size:.84rem;
  text-align:center;
  margin-top:8px;
  padding:0 12px;
}
.article-endnote{
  max-width:720px;
  margin:28px auto 0;
  background:rgba(234,240,245,.5);
  border:1px dashed #C6D4DE;
  border-radius:14px;
  padding:16px 20px;
  color:var(--color-muted);
  font-size:.9rem;
  line-height:1.8;
}
.article-back-actions{
  max-width:720px;
  margin:26px auto 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:14px;
  border-top:1px solid var(--color-line);
  padding-top:26px;
}
.article-back-back{
  display:inline-flex;align-items:center;gap:.6rem;
  color:var(--color-primary);
  font-weight:600;
}
.article-back-back:hover{color:var(--color-primary-dark);transform:translateX(-3px)}
.article-back-back{transition:transform var(--ease),color var(--ease)}
.article-back-cat{display:inline-flex;align-items:center;gap:.5rem;color:var(--color-muted);font-size:.9rem}

/* 相关阅读 */
.section-related{padding:72px 0 36px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
  margin-bottom:28px;
}
.section-eyebrow{color:var(--color-primary);font-size:.82rem;font-weight:700;letter-spacing:.14em}
.section-head h2{
  font-size:clamp(1.5rem,2.6vw,2rem);
  font-weight:820;
  letter-spacing:-.02em;
  margin-top:6px;
  line-height:1.35;
}
.section-head .head-more{
  color:var(--color-primary);
  font-weight:600;
  font-size:.9rem;
  display:inline-flex;
  align-items:center;
  gap:.4rem;
}
.section-head .head-more:hover{color:var(--color-primary-dark)}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.related-card{
  background:var(--color-surface);
  border:1px solid rgba(220,230,237,.85);
  border-radius:16px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.related-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(30,107,184,.24)}
.related-thumb{background:var(--color-soft);aspect-ratio:16/9;overflow:hidden}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-info{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-tag{
  align-self:flex-start;
  font-size:.75rem;
  color:var(--color-primary);
  background:rgba(30,107,184,.07);
  padding:.22rem .6rem;
  border-radius:6px;
}
.related-info h3{font-size:1rem;line-height:1.55;font-weight:700;color:var(--color-ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:3.1rem}
.related-meta{margin-top:auto;color:var(--color-muted);font-size:.8rem}

/* 文章页 CTA */
.cta-panel-wrap{padding:70px 0 80px}
.cta-panel{
  background:linear-gradient(135deg,#0D3454 0%,#1E6BB8 100%);
  color:#fff;
  border-radius:24px;
  padding:clamp(28px,5vw,54px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
  box-shadow:0 22px 50px rgba(22,65,105,.2);
  position:relative;
  overflow:hidden;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:320px;height:320px;
  border-radius:50%;
  background:rgba(57,231,194,.09);
}
.cta-panel .cta-copy{position:relative;z-index:1;max-width:28rem}
.cta-panel .eyebrow{color:var(--color-neon);font-weight:700;letter-spacing:.1em;font-size:.8rem;display:block;margin-bottom:10px}
.cta-panel h2{font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.42;font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.cta-panel p{color:rgba(255,255,255,.82);font-size:1rem;line-height:1.9}
.cta-panel-actions{display:flex;align-items:center;flex-wrap:wrap;gap:14px;position:relative;z-index:1;flex:none}

/* 空态 */
.page-missing{padding:72px 0 110px}
.page-missing-card{
  max-width:650px;margin:0 auto;background:#fff;
  border:1px dashed #BBCEDC;border-radius:22px;
  padding:48px 32px;text-align:center;
  box-shadow:var(--shadow-sm);
}
.missing-icon{
  width:58px;height:58px;margin:0 auto 20px;border-radius:16px;
  background:var(--color-soft);color:var(--color-primary);
  display:flex;align-items:center;justify-content:center;font-size:1.8rem;
}
.page-missing-card h1{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:10px}
.page-missing-card p{color:var(--color-muted);line-height:1.9;margin-bottom:24px}

/* Responsive */
@media (max-width:1100px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .header-cta{display:none}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:36px 28px}
}
@media (max-width:900px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .article-page-main{padding-bottom:48px}
  .article-back-actions{flex-direction:column;align-items:flex-start}
  .cta-panel{flex-direction:column;align-items:flex-start}
  .cta-panel-actions{width:100%}
  .cta-panel-actions .btn{flex:1;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-top{padding-top:44px}
  .section-related{padding:50px 0 30px}
  .cta-panel-wrap{padding:44px 0 56px}
}
@media (max-width:560px){
  .related-grid{grid-template-columns:1fr}
  .container-site{padding-left:18px;padding-right:18px}
  .article-paper{padding:24px 18px 30px}
  .article-title{font-size:1.7rem}
  .article-meta{font-size:.82rem;gap:8px 14px}
  .footer-bottom-inner{flex-direction:column;justify-content:center;text-align:center;padding:18px 0}
}

/* roulang page: category2 */
:root{
    --color-bg:#F7F9FC; --color-surface:#FFFFFF; --color-soft:#EAF0F5; --color-line:#DCE6ED;
    --color-primary:#1E6BB8; --color-primary-dark:#145294; --color-accent-teal:#24C6B0;
    --color-warm-cta:#F0A92E; --color-ink:#16283B; --color-muted:#5C6F7E;
    --color-nav-bg:#0A1B2A; --color-neon:#39E7C2; --color-cta-fg:#101C28;
    --radius-card:16px; --radius-btn:10px;
    --shadow-soft:0 10px 30px rgba(22,40,59,.07);
    --shadow-card:0 6px 20px rgba(16,28,40,.05);
    --shadow-card-hover:0 16px 36px rgba(22,40,59,.12);
  }
  *{ box-sizing:border-box; margin:0; padding:0; }
  html{ scroll-behavior:smooth; }
  body{ background:var(--color-bg); color:var(--color-ink); font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,sans-serif; line-height:1.7; -webkit-font-smoothing:antialiased; }
  img{ display:block; max-width:100%; }
  a{ color:inherit; text-decoration:none; }
  button{ font-family:inherit; }
  .container-site{ max-width:1240px; margin:0 auto; padding-left:24px; padding-right:24px; }

  /* ===== Header / Nav ===== */
  .site-header{ background:var(--color-nav-bg); position:relative; z-index:50; border-bottom:2px solid transparent; border-image:linear-gradient(90deg, rgba(57,231,194,.65), rgba(57,231,194,.12), rgba(57,231,194,.55)) 1; }
  .header-inner{ display:flex; align-items:center; justify-content:space-between; height:76px; gap:24px; }
  .brand{ display:flex; align-items:baseline; gap:4px; font-weight:700; font-size:26px; letter-spacing:.3px; color:#fff; white-space:nowrap; }
  .brand-accent{ color:var(--color-neon); }
  .nav-links{ display:flex; align-items:center; gap:34px; }
  .nav-item{ position:relative; }
  .nav-link{ color:rgba(255,255,255,.78); font-size:15px; font-weight:500; padding:8px 0 10px; transition:color .2s; position:relative; border:none; background:none; cursor:pointer; }
  .nav-link::after{ content:""; position:absolute; left:0; right:100%; bottom:-2px; height:2px; background:var(--color-neon); box-shadow:0 0 10px rgba(57,231,194,.6); transition:right .28s ease; }
  .nav-link:hover{ color:#fff; }
  .nav-link:hover::after,
  .nav-item.is-active .nav-link::after{ right:0; }
  .nav-item.is-active .nav-link{ color:#fff; text-shadow:0 0 14px rgba(57,231,194,.45); }
  .nav-item.is-active .nav-link::after{ right:0; box-shadow:0 0 10px rgba(57,231,194,.75); }
  .dropdown-title{ display:flex; align-items:center; gap:6px; color:rgba(255,255,255,.8); font-size:15px; font-weight:500; background:none; border:none; padding:8px 0 10px; cursor:pointer; transition:color .2s; }
  .dropdown-title svg{ transition:transform .25s ease; }
  .nav-item.has-dropdown:hover .dropdown-title{ color:#fff; }
  .nav-item.has-dropdown:hover .dropdown-title svg{ transform:rotate(180deg); }
  .dropdown-panel{ position:absolute; top:calc(100% + 14px); left:50%; transform:translateX(-50%); background:#fff; min-width:340px; border-radius:14px; padding:10px; box-shadow:0 18px 46px rgba(6,18,28,.18); opacity:0; visibility:hidden; transition:opacity .22s, transform .22s, visibility .22s; display:grid; grid-template-columns:1fr 1fr; gap:4px; }
  .nav-item.has-dropdown:hover .dropdown-panel{ opacity:1; visibility:visible; transform:translateX(-50%) translateY(0); }
  .dropdown-panel a{ display:flex; flex-direction:column; gap:2px; padding:12px 14px; border-radius:10px; font-size:15px; font-weight:600; color:var(--color-ink); transition:background .18s, color .18s; }
  .dropdown-panel a small{ font-weight:400; font-size:12px; color:var(--color-muted); line-height:1.45; }
  .dropdown-panel a:hover{ background:var(--color-soft); color:var(--color-primary-dark); }
  .dropdown-panel a:hover small{ color:#405565; }
  .nav-cta-wrap{ display:flex; align-items:center; gap:10px; }
  .btn-warm{ background:var(--color-warm-cta); color:var(--color-cta-fg); font-weight:700; font-size:15px; line-height:1; padding:13px 24px; border-radius:var(--radius-btn); display:inline-flex; align-items:center; gap:8px; border:none; cursor:pointer; transition:background .2s, transform .2s, box-shadow .2s; box-shadow:0 6px 16px rgba(240,169,46,.22); }
  .btn-warm:hover{ background:#F7B84C; transform:translateY(-2px); box-shadow:0 10px 24px rgba(240,169,46,.3); }
  .btn-warm:focus-visible{ outline:3px solid rgba(240,169,46,.6); outline-offset:2px; }
  .btn-warm:active{ transform:translateY(0); box-shadow:0 3px 8px rgba(240,169,46,.25); }
  .btn-ghost-light{ display:inline-flex; align-items:center; gap:8px; padding:11px 20px; border-radius:var(--radius-btn); color:#fff; font-size:14px; font-weight:600; background:transparent; border:1px solid rgba(255,255,255,.25); cursor:pointer; transition:border-color .2s, background .2s, color .2s; }
  .btn-ghost-light:hover{ border-color:rgba(57,231,194,.85); color:var(--color-neon); background:rgba(57,231,194,.06); }
  .btn-ghost-light:focus-visible{ outline:3px solid rgba(57,231,194,.45); outline-offset:2px; }

  .nav-toggle{ display:none; background:none; border:none; color:#fff; font-size:24px; cursor:pointer; padding:6px; }
  .mobile-drawer{ position:fixed; top:0; right:-320px; width:300px; height:100vh; background:var(--color-nav-bg); z-index:100; padding:96px 28px 32px; transition:right .35s ease; box-shadow:-16px 0 40px rgba(0,0,0,.3); }
  .mobile-drawer.open{ right:0; }
  .drawer-overlay{ position:fixed; inset:0; background:rgba(5,14,22,.6); backdrop-filter:blur(2px); z-index:99; opacity:0; visibility:hidden; transition:opacity .3s, visibility .3s; }
  .drawer-overlay.open{ opacity:1; visibility:visible; }
  .drawer-close{ position:absolute; top:18px; right:18px; background:none; border:2px solid rgba(255,255,255,.32); color:#fff; width:44px; height:44px; border-radius:12px; font-size:22px; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:border-color .2s; }
  .drawer-close:hover{ border-color:var(--color-neon); color:var(--color-neon); }
  .mobile-drawer a{ display:block; color:rgba(255,255,255,.82); font-size:17px; font-weight:600; padding:13px 6px; border-bottom:1px solid rgba(255,255,255,.08); transition:color .18s, padding-left .18s; }
  .mobile-drawer a:hover{ color:var(--color-neon); padding-left:12px; }
  .drawer-cat-title{ color:var(--color-neon); font-size:13px; text-transform:uppercase; letter-spacing:1px; margin:22px 4px 8px; font-weight:600; }
  .mobile-drawer .nav-cta-mobile{ margin-top:30px; }

  /* ===== Hero ===== */
  .category-hero{ background:linear-gradient(135deg,#F2F7FB 0%,#ffffff 55%,#E8F2F0 100%); position:relative; overflow:hidden; border-bottom:1px solid var(--color-line); }
  .hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:58px; align-items:center; padding:90px 0 92px; }
  .hero-badge{ display:inline-flex; align-items:center; gap:8px; background:rgba(30,107,184,.08); border:1px solid rgba(30,107,184,.18); color:var(--color-primary-dark); font-size:13px; font-weight:600; padding:7px 14px; border-radius:40px; margin-bottom:26px; }
  .hero-badge i{ color:var(--color-primary); }
  .category-hero h1{ font-size:46px; font-weight:800; line-height:1.28; letter-spacing:-.4px; max-width:420px; color:var(--color-ink); }
  .category-hero h1 .grad-text{ background:linear-gradient(100deg,#145294 0%,#1E6BB8 40%,#128f83 100%); -webkit-background-clip:text; background-clip:text; color:transparent; }
  .hero-sub{ font-size:18px; line-height:1.8; color:var(--color-muted); margin:24px 0 6px; max-width:470px; }
  .hero-points{ display:flex; flex-wrap:wrap; gap:18px 28px; margin:22px 0 34px; }
  .hero-point{ display:flex; align-items:center; gap:9px; font-size:14px; font-weight:600; color:#34495B; }
  .hero-point i{ color:var(--color-accent-teal); font-size:15px; }
  .hero-stats{ display:flex; gap:0; margin-top:34px; border-top:1px solid var(--color-line); padding-top:26px; }
  .hero-stat{ flex:1; }
  .hero-stat+.hero-stat{ border-left:1px solid var(--color-line); padding-left:28px; }
  .hero-stat-value{ font-size:24px; font-weight:800; color:var(--color-ink); display:flex; align-items:baseline; gap:3px; }
  .hero-stat-value span{ font-size:14px; font-weight:600; color:var(--color-primary); }
  .hero-stat-label{ font-size:13px; color:var(--color-muted); margin-top:3px; }
  .hero-img-wrap{ position:relative; }
  .hero-img-wrap::before{ content:""; position:absolute; inset:20px -12px -12px 20px; background:var(--color-soft); border-radius:22px; border:1px solid var(--color-line); z-index:0; }
  .hero-img{ position:relative; aspect-ratio:4/3.3; border-radius:18px; overflow:hidden; box-shadow:0 24px 50px rgba(16,28,40,.16); z-index:1; background:var(--color-soft); }
  .hero-img img{ width:100%; height:100%; object-fit:cover; }
  .hero-float-card{ position:absolute; left:-34px; bottom:-24px; z-index:2; background:#fff; border-radius:14px; box-shadow:0 12px 30px rgba(16,28,40,.14); padding:14px 20px; display:flex; align-items:center; gap:10px; border:1px solid rgba(30,107,184,.1); }
  .hero-float-card i{ font-size:24px; color:var(--color-accent-teal); }

  /* ===== Filter ===== */
  .filter-section{ padding:56px 0 12px; }
  .filter-bar{ background:var(--color-surface); border:1px solid var(--color-line); border-radius:16px; padding:18px 22px; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:14px; box-shadow:var(--shadow-soft); }
  .filter-group{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
  .filter-label{ font-size:14px; font-weight:700; color:var(--color-ink); margin-right:6px; }
  .filter-tag{ display:inline-block; padding:7px 16px; border-radius:30px; font-size:13px; font-weight:600; color:#536b7d; background:var(--color-soft); border:1px solid transparent; cursor:pointer; transition:all .18s; }
  .filter-tag:hover{ color:var(--color-primary-dark); background:#E1EBF3; }
  .filter-tag.is-on{ background:var(--color-primary); color:#fff; box-shadow:0 4px 10px rgba(30,107,184,.2); }
  .filter-icon-group{ display:flex; gap:8px; }
  .filter-icon-btn{ width:42px; height:42px; border-radius:10px; border:1px solid var(--color-line); background:#fff; display:flex; align-items:center; justify-content:center; color:var(--color-muted); cursor:pointer; transition:border-color .18s, background .18s, color .18s; font-size:15px; }
  .filter-icon-btn:hover{ border-color:var(--color-primary); color:var(--color-primary); }
  .filter-icon-btn.is-on{ background:var(--color-primary); color:#fff; border-color:var(--color-primary); }

  /* ===== Section ===== */
  .section{ padding:72px 0; }
  .section-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:30px; margin-bottom:36px; }
  .section-head h2{ font-size:31px; font-weight:800; line-height:1.3; letter-spacing:-.3px; }
  .section-head p{ font-size:16px; color:var(--color-muted); margin-top:8px; max-width:560px; }
  .link-more{ color:var(--color-primary-dark); font-size:15px; font-weight:600; display:inline-flex; align-items:center; gap:6px; flex-shrink:0; transition:gap .2s, color .2s; }
  .link-more:hover{ gap:10px; color:var(--color-primary); }
  .bg-soft-section{ background:var(--color-soft); }

  /* ===== Product cards ===== */
  .product-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
  .product-card{ background:var(--color-surface); border:1px solid var(--color-line); border-radius:var(--radius-card); overflow:hidden; transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease; display:flex; flex-direction:column; }
  .product-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-card-hover); border-color:rgba(30,107,184,.28); }
  .product-img{ aspect-ratio:1/1; background:var(--color-soft); overflow:hidden; position:relative; }
  .product-img img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .product-card:hover .product-img img{ transform:scale(1.04); }
  .product-badge{ position:absolute; top:12px; left:12px; background:rgba(16,28,40,.62); backdrop-filter:blur(4px); color:#fff; font-size:12px; font-weight:600; padding:5px 11px; border-radius:30px; }
  .product-info{ padding:18px 16px 20px; display:flex; flex-direction:column; gap:8px; flex:1; }
  .product-name{ font-size:17px; font-weight:700; color:var(--color-ink); line-height:1.4; }
  .product-spec{ font-size:13px; color:var(--color-muted); display:flex; align-items:center; gap:6px; }
  .product-spec i{ color:var(--color-accent-teal); }
  .product-bottom{ display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:8px; }
  .product-price{ font-size:20px; font-weight:800; color:var(--color-warm-cta); }
  .product-price small{ font-size:12px; font-weight:600; color:var(--color-muted); margin-right:2px; }
  .btn-add{ background:rgba(240,169,46,.14); color:#a86a10; border:none; width:40px; height:40px; border-radius:10px; display:flex; align-items:center; justify-content:center; cursor:pointer; font-size:16px; transition:background .18s, color .18s, transform .18s; }
  .btn-add:hover{ background:var(--color-warm-cta); color:var(--color-cta-fg); transform:scale(1.06); }
  .btn-add:focus-visible{ outline:3px solid rgba(240,169,46,.45); outline-offset:2px; }
  .btn-add:active{ transform:scale(.96); }

  /* ===== feature split ===== */
  .feature-split{ display:grid; grid-template-columns:1fr 1fr; border-radius:20px; overflow:hidden; background:var(--color-surface); border:1px solid var(--color-line); }
  .feature-img-side{ position:relative; min-height:420px; }
  .feature-img-side img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
  .feature-content{ padding:56px 56px 54px; display:flex; flex-direction:column; justify-content:center; }
  .feature-kicker{ font-size:13px; font-weight:700; letter-spacing:1px; color:var(--color-primary); margin-bottom:16px; text-transform:uppercase; }
  .feature-content h3{ font-size:30px; font-weight:800; line-height:1.3; }
  .feature-list{ list-style:none; margin:26px 0 30px; display:grid; gap:14px; }
  .feature-list li{ display:flex; gap:12px; align-items:flex-start; font-size:15px; color:#3d5668; }
  .feature-list li i{ color:var(--color-accent-teal); font-size:16px; margin-top:4px; }

  /* ===== service strip ===== */
  .service-strip{ background:var(--color-ink); border-radius:18px; padding:40px 46px; display:grid; grid-template-columns:repeat(3,1fr); gap:30px; color:#fff; }
  .service-item{ display:flex; gap:16px; align-items:flex-start; }
  .service-item i{ font-size:26px; color:var(--color-neon); margin-top:2px; flex-shrink:0; }
  .service-item h4{ font-size:17px; font-weight:700; margin-bottom:5px; color:#fff; }
  .service-item p{ font-size:14px; color:rgba(255,255,255,.68); line-height:1.65; }

  /* ===== scenario cards ===== */
  .scenario-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
  .scenario-card{ background:var(--color-surface); border-radius:var(--radius-card); border:1px solid var(--color-line); padding:30px 24px 28px; transition:box-shadow .2s, transform .2s; }
  .scenario-card:hover{ box-shadow:var(--shadow-card-hover); transform:translateY(-3px); }
  .scenario-icon{ width:52px; height:52px; border-radius:14px; background:linear-gradient(135deg,#E5F0F8,#e2f1ef); display:flex; align-items:center; justify-content:center; font-size:22px; color:var(--color-primary); margin-bottom:18px; }
  .scenario-card h3{ font-size:19px; font-weight:700; margin-bottom:10px; }
  .scenario-card p{ font-size:14px; color:var(--color-muted); line-height:1.75; }

  /* ===== step/flow ===== */
  .steps-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
  .step-card{ position:relative; }
  .step-card-inner{ background:var(--color-surface); border:1px solid var(--color-line); border-radius:16px; padding:30px 20px 26px; height:100%; transition:border-color .2s, box-shadow .2s; }
  .step-card-inner:hover{ border-color:rgba(30,107,184,.3); box-shadow:var(--shadow-card); }
  .step-num{ font-size:34px; font-weight:800; color:#c9d7e2; line-height:1; margin-bottom:12px; font-family:'Inter'; }
  .step-card h3{ font-size:17px; font-weight:700; margin-bottom:8px; }
  .step-card p{ font-size:14px; color:var(--color-muted); line-height:1.7; }

  /* ===== FAQ ===== */
  .faq-wrap{ max-width:820px; margin:0 auto; }
  .faq-item{ background:var(--color-surface); border:1px solid var(--color-line); border-radius:14px; margin-bottom:12px; overflow:hidden; transition:border-color .2s, box-shadow .2s; }
  .faq-item.is-open{ border-color:rgba(30,107,184,.28); box-shadow:var(--shadow-soft); }
  .faq-btn{ width:100%; display:flex; align-items:center; justify-content:space-between; background:none; border:none; padding:20px 22px; cursor:pointer; text-align:left; font-size:15px; font-weight:600; color:var(--color-ink); gap:14px; font-family:inherit; }
  .faq-btn i{ font-size:14px; color:var(--color-primary); flex-shrink:0; transition:transform .28s ease; }
  .faq-item.is-open .faq-btn i{ transform:rotate(180deg); }
  .faq-answer{ max-height:0; overflow:hidden; transition:max-height .32s ease; }
  .faq-answer-inner{ padding:0 22px 18px; font-size:15px; color:var(--color-muted); line-height:1.8; border-top:none; }
  .faq-item.is-open .faq-answer{ max-height:600px; }

  /* ===== CTA ===== */
  .cta-box{ background:linear-gradient(105deg,#0E2233 0%,#12374e 60%,#0f3f44 100%); border-radius:22px; padding:56px 60px; display:flex; gap:30px; align-items:center; justify-content:space-between; position:relative; overflow:hidden; box-shadow:0 20px 40px rgba(10,27,42,.18); }
  .cta-box::after{ content:""; position:absolute; bottom:-60px; right:-40px; width:240px; height:240px; border-radius:50%; background:rgba(57,231,194,.08); }
  .cta-box h2{ color:#fff; font-size:27px; line-height:1.4; max-width:500px; }
  .cta-btn-group{ display:flex; gap:14px; flex-shrink:0; position:relative; z-index:2; flex-wrap:wrap; justify-content:flex-end; }

  /* ===== Footer ===== */
  .site-footer{ background:var(--color-nav-bg); color:rgba(255,255,255,.75); }
  .site-footer::before{ content:""; display:block; height:2px; background:linear-gradient(90deg, #39E7C2 0%, rgba(57,231,194,.15) 50%, #39E7C2 100%); }
  .footer-top{ padding:58px 24px 48px; }
  .footer-grid{ display:grid; grid-template-columns:1.4fr .8fr .8fr 1.1fr; gap:48px; }
  .footer-brand .brand{ font-size:25px; }
  .footer-brand p{ font-size:14px; line-height:1.8; margin-top:14px; max-width:230px; color:rgba(255,255,255,.58); }
  .footer-col h3{ font-size:15px; color:#fff; font-weight:700; margin-bottom:16px; letter-spacing:.3px; }
  .footer-col ul{ list-style:none; }
  .footer-col li{ margin-bottom:10px; font-size:14px; line-height:1.6; }
  .footer-col a{ color:rgba(255,255,255,.72); transition:color .18s, padding-left .18s; }
  .footer-col a:hover{ color:var(--color-neon); padding-left:5px; }
  .footer-contact-list li{ display:flex; align-items:center; gap:10px; color:rgba(255,255,255,.66); }
  .footer-contact-list li::before{ content:"●"; font-size:5px; color:var(--color-accent-teal); background:transparent; line-height:1; }
  .footer-bottom{ border-top:1px solid rgba(255,255,255,.08); padding:18px 0; }
  .footer-bottom-inner{ display:flex; align-items:center; justify-content:space-between; gap:14px; font-size:13px; color:rgba(255,255,255,.42); flex-wrap:wrap; }
  .back-top{ color:var(--color-neon); font-size:13px; font-weight:600; transition:color .18s; }
  .back-top:hover{ color:#16e5ba; }

  .section-gap{ height:10px; }
  .backdrop-blur-sm{ backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px); }
  .transition{ transition:all .2s ease; }
  .faq-wrap .faq-item .faq-btn i.fa-chevron-down{ transition:transform .3s ease; }
  .faq-item.is-open .faq-btn i.fa-chevron-down{ transform:rotate(180deg); }

  @media(max-width:1024px){
    .product-grid{ grid-template-columns:repeat(3,1fr); }
    .scenario-grid{ grid-template-columns:repeat(2,1fr); }
    .steps-grid{ grid-template-columns:repeat(2,1fr); }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:36px; }
    .hero-grid{ grid-template-columns:1fr 1fr; gap:40px; }
  }
  @media(max-width:900px){
    .nav-links{ display:none; }
    .nav-cta-wrap .btn-warm{ display:none; }
    .nav-toggle{ display:flex; }
    .hero-grid{ grid-template-columns:1fr; gap:50px; }
    .category-hero h1{ font-size:38px; max-width:100%; }
    .hero-img-wrap::before{ display:none; }
    .hero-float-card{ left:12px; bottom:-18px; }
    .hero-img{ max-height:400px; }
    .feature-split{ grid-template-columns:1fr; }
    .feature-img-side{ min-height:280px; }
    .feature-content{ padding:36px 30px; }
    .section{ padding:56px 0; }
    .cta-box{ flex-direction:column; align-items:flex-start; padding:44px 34px; }
    .cta-box h2{ font-size:23px; }
    .cta-btn-group{ justify-content:flex-start; }
    .service-strip{ grid-template-columns:1fr 1fr; padding:30px; }
    .filter-bar{ flex-direction:column; align-items:flex-start; }
    .filter-icon-group{ width:100%; }
  }
  @media(max-width:620px){
    .product-grid{ grid-template-columns:1fr 1fr; gap:14px; }
    .scenario-grid{ grid-template-columns:1fr; }
    .steps-grid{ grid-template-columns:1fr; }
    .footer-grid{ grid-template-columns:1fr; gap:30px; }
    .footer-brand p{ max-width:100%; }
    .hero-stats{ gap:14px; }
    .hero-stat+.hero-stat{ border-left:none; padding-left:0; }
    .hero-stat{ padding:12px; border-left:none !important; }
    .category-hero h1{ font-size:31px; }
    .hero-sub{ font-size:15px; }
    .hero-points{ gap:10px; flex-direction:column; align-items:flex-start; }
    .service-strip{ grid-template-columns:1fr; }
    .feature-list{margin:16px 0 18px;}
    .filter-tag{ padding:7px 14px; }
  }
  @media(max-width:380px){
    .product-grid{ grid-template-columns:1fr; }
    .product-info{ padding:14px; }
    .brand{ font-size:23px; }
    .mobile-drawer{ width:280px; }
  }

/* roulang page: category1 */
:root {
      --color-bg: #F7F9FC;
      --color-surface: #FFFFFF;
      --color-soft: #EAF0F5;
      --color-line: #DCE6ED;
      --color-primary: #1E6BB8;
      --color-primary-dark: #145294;
      --color-accent-teal: #24C6B0;
      --color-warm-cta: #F0A92E;
      --color-warm-dark: #D99017;
      --color-ink: #16283B;
      --color-muted: #5C6F7E;
      --color-nav-bg: #0A1B2A;
      --color-neon: #39E7C2;
      --color-cta-fg: #101C28;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 10px 24px rgba(22, 40, 59, .06);
      --shadow-hover: 0 20px 38px rgba(22, 40, 59, .11);
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      background: var(--color-bg);
      color: var(--color-ink);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      line-height: 1.25;
      margin: 0;
    }

    p {
      margin: 0 0 1rem;
    }

    ul, ol {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      display: block;
      max-width: 100%;
    }

    button, input, textarea, select {
      font: inherit;
      color: inherit;
    }

    button {
      border: 0;
      background: none;
      cursor: pointer;
      padding: 0;
    }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(57, 231, 194, .75);
      outline-offset: 3px;
      border-radius: 6px;
    }

    .container-site {
      width: min(100% - 2.5rem, 1240px);
      margin-inline: auto;
    }

    .section-space {
      padding-block: clamp(3rem, 7vw, 5.5rem);
    }

    .section-soft {
      background: var(--color-soft);
    }

    .section-title {
      font-size: clamp(1.55rem, 2.2vw, 2.25rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--color-ink);
    }

    .section-sub {
      color: var(--color-muted);
      font-size: 1rem;
      max-width: 50rem;
      margin-top: .7rem;
    }

    .kicker {
      display: inline-flex;
      align-items: center;
      gap: .5rem;
      background: var(--color-soft);
      border: 1px solid rgba(30, 107, 184, .12);
      color: var(--color-primary-dark);
      font-size: .8rem;
      font-weight: 700;
      padding: .32rem .8rem;
      border-radius: 999px;
      letter-spacing: .02em;
    }

    .brand {
      font-weight: 800;
      font-size: 1.42rem;
      color: #fff;
      white-space: nowrap;
      letter-spacing: -0.02em;
    }

    .brand-accent {
      color: var(--color-neon);
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(10, 27, 42, .97);
      box-shadow: 0 6px 18px rgba(10, 27, 42, .18);
    }

    .site-header::before {
      content: "";
      display: block;
      height: 2px;
      background: linear-gradient(90deg, transparent 0%, var(--color-neon) 22%, #89F5E7 50%, var(--color-neon) 78%, transparent 100%);
    }

    .header-inner {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1.25rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: .2rem;
      margin-inline: auto;
    }

    .nav-item {
      position: relative;
    }

    .nav-link,
    .dropdown-title {
      display: inline-flex;
      align-items: center;
      gap: .38rem;
      min-height: 44px;
      padding: .5rem .85rem;
      color: rgba(255, 255, 255, .78);
      font-weight: 500;
      border-radius: 8px;
      line-height: 1;
      position: relative;
      transition: color .2s ease, text-shadow .2s ease;
    }

    .nav-link:hover,
    .dropdown-title:hover {
      color: #fff;
      text-shadow: 0 0 8px rgba(57, 231, 194, .55);
    }

    .nav-link::after,
    .dropdown-title::after {
      content: "";
      position: absolute;
      left: .9rem;
      right: .9rem;
      bottom: .3rem;
      height: 2px;
      background: var(--color-neon);
      border-radius: 2px;
      box-shadow: 0 0 8px rgba(57, 231, 194, .9);
      opacity: 0;
      transform: scaleX(.5);
      transition: opacity .2s ease, transform .2s ease;
    }

    .nav-link:hover::after,
    .dropdown-title:hover::after {
      opacity: .85;
      transform: scaleX(.72);
    }

    .nav-item.is-active .nav-link,
    .nav-item.is-active .dropdown-title {
      color: #fff;
      text-shadow: 0 0 9px rgba(57, 231, 194, .55);
    }

    .nav-item.is-active .nav-link::after,
    .nav-item.is-active .dropdown-title::after {
      opacity: 1;
      transform: scaleX(1);
    }

    .nav-item.is-active .dropdown-title svg {
      color: var(--color-neon);
    }

    .dropdown-panel {
      position: absolute;
      top: calc(100% + 10px);
      left: 50%;
      display: grid;
      grid-template-columns: repeat(2, minmax(220px, 270px));
      gap: .3rem;
      padding: .85rem;
      width: max-content;
      background: #fff;
      border-radius: var(--radius-md);
      box-shadow: 0 26px 58px rgba(8, 28, 45, .22);
      transform: translateX(-50%) translateY(8px);
      opacity: 0;
      visibility: hidden;
      transition: opacity .18s ease, transform .18s ease, visibility .18s;
      z-index: 75;
    }

    .has-dropdown:hover .dropdown-panel,
    .has-dropdown.is-open .dropdown-panel,
    .has-dropdown:focus-within .dropdown-panel {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
    }

    .dropdown-panel a {
      display: flex;
      flex-direction: column;
      gap: .12rem;
      padding: .72rem .9rem;
      border-radius: 10px;
      color: var(--color-ink);
      font-size: .92rem;
      font-weight: 650;
      transition: background .18s ease, color .18s ease;
    }

    .dropdown-panel a small {
      font-size: .78rem;
      color: var(--color-muted);
      font-weight: 400;
    }

    .dropdown-panel a:hover,
    .dropdown-panel a.is-current {
      background: var(--color-soft);
      color: var(--color-primary-dark);
    }

    .dropdown-panel a.is-current {
      box-shadow: inset 3px 0 0 var(--color-primary);
    }

    .header-cta-wrap {
      display: flex;
      align-items: center;
      gap: .8rem;
    }

    .btn-nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-warm-cta);
      color: var(--color-cta-fg) !important;
      font-size: .88rem;
      font-weight: 800;
      min-height: 42px;
      padding: .52rem 1.15rem;
      border-radius: 9px;
      box-shadow: 0 5px 14px rgba(240, 169, 46, .18);
      transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
    }

    .btn-nav-cta:hover {
      background: #F5B951;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(240, 169, 46, .25);
    }

    .btn-nav-cta:active {
      transform: translateY(0);
      background: var(--color-warm-dark);
    }

    .menu-toggle {
      display: none;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      color: #fff;
      border-radius: 9px;
      border: 1px solid rgba(255, 255, 255, .16);
      transition: background .2s ease, border .2s ease;
    }

    .menu-toggle:hover {
      background: rgba(255, 255, 255, .1);
    }

    /* ===== Mobile drawer ===== */
    .mobile-menu {
      position: fixed;
      inset: 0;
      z-index: 100;
      background: rgba(4, 13, 21, .58);
      opacity: 0;
      visibility: hidden;
      transition: opacity .2s ease, visibility .2s ease;
    }

    .mobile-menu.is-open {
      opacity: 1;
      visibility: visible;
    }

    .mobile-drawer {
      position: absolute;
      top: 0;
      right: 0;
      height: 100%;
      width: min(88vw, 400px);
      background: var(--color-nav-bg);
      color: rgba(255, 255, 255, .9);
      padding: 1.4rem 1.4rem 2rem;
      overflow-y: auto;
      transform: translateX(20px);
      transition: transform .22s ease;
      box-shadow: -20px 0 45px rgba(5, 16, 25, .35);
    }

    .mobile-menu.is-open .mobile-drawer {
      transform: translateX(0);
    }

    .drawer-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1.4rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .drawer-close {
      width: 44px;
      height: 44px;
      color: #fff;
      font-size: 1.5rem;
      line-height: 1;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background .2s ease;
    }

    .drawer-close:hover {
      background: rgba(255, 255, 255, .12);
    }

    .mobile-nav-label {
      color: var(--color-neon);
      font-size: .74rem;
      font-weight: 700;
      letter-spacing: .12em;
      margin: 1.3rem 0 .6rem;
    }

    .mobile-nav a {
      display: block;
      color: rgba(255, 255, 255, .88);
      padding: .7rem .5rem;
      border-radius: 8px;
      font-weight: 600;
      transition: background .2s ease, color .2s ease;
    }

    .mobile-nav a:hover {
      background: rgba(57, 231, 194, .14);
      color: #fff;
    }

    .mobile-subnav a {
      display: flex;
      flex-direction: column;
      padding: .7rem .8rem;
      border-left: 2px solid rgba(255, 255, 255, .16);
      border-radius: 0 8px 8px 0;
    }

    .mobile-subnav a.is-current {
      border-left-color: var(--color-neon);
      background: rgba(57, 231, 194, .12);
    }

    .mobile-subnav small {
      color: rgba(255, 255, 255, .6);
      font-size: .76rem;
      font-weight: 400;
    }

    .mobile-drawer-cta {
      margin-top: 1.5rem;
      display: flex;
    }

    /* ===== Common Buttons ===== */
    .btn-warm,
    .btn-ghost,
    .btn-dark,
    .btn-add {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: .45rem;
      min-height: 46px;
      font-weight: 750;
      font-size: .95rem;
      padding: .68rem 1.35rem;
      border-radius: 10px;
      transition: background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }

    .btn-warm {
      background: var(--color-warm-cta);
      color: var(--color-cta-fg);
      box-shadow: 0 10px 22px rgba(240, 169, 46, .24);
    }

    .btn-warm:hover {
      background: #F5B951;
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(240, 169, 46, .28);
    }

    .btn-warm:active {
      transform: translateY(0);
      background: var(--color-warm-dark);
    }

    .btn-ghost {
      background: #fff;
      color: var(--color-primary-dark);
      border: 1px solid var(--color-line);
      box-shadow: 0 6px 16px rgba(22, 40, 59, .05);
    }

    .btn-ghost:hover {
      border-color: var(--color-primary);
      transform: translateY(-2px);
      box-shadow: 0 10px 22px rgba(30, 107, 184, .12);
    }

    .btn-ghost:active {
      transform: translateY(0);
    }

    .btn-dark {
      background: rgba(255, 255, 255, .1);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, .28);
    }

    .btn-dark:hover {
      background: rgba(255, 255, 255, .16);
      color: #fff;
      transform: translateY(-2px);
    }

    .btn-add {
      background: var(--color-warm-cta);
      color: var(--color-cta-fg);
      min-height: 42px;
      font-size: .86rem;
      padding: .45rem .95rem;
      border-radius: 8px;
    }

    .btn-add:hover {
      background: #F5B951;
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(240, 169, 46, .25);
    }

    .btn-add:active {
      transform: translateY(0);
      background: var(--color-warm-dark);
    }

    .btn-lg {
      min-height: 54px;
      padding: .8rem 1.8rem;
      font-size: 1.02rem;
    }

    /* ===== Category hero ===== */
    .category-hero {
      background: linear-gradient(180deg, #fff 0%, #F4F8FB 100%);
      padding-block: clamp(2.8rem, 5.5vw, 4.4rem);
      border-bottom: 1px solid var(--color-line);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
      gap: clamp(1.5rem, 4vw, 4rem);
      align-items: center;
    }

    .hero-copy h1 {
      font-size: clamp(1.7rem, 3.3vw, 2.8rem);
      font-weight: 850;
      letter-spacing: -0.035em;
      color: var(--color-ink);
      margin-top: .9rem;
      max-width: 12em;
    }

    .hero-lead {
      color: var(--color-muted);
      font-size: 1.04rem;
      line-height: 1.8;
      margin-top: 1.1rem;
      max-width: 33rem;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: .8rem;
      margin-top: 1.7rem;
    }

    .hero-mini-list {
      display: flex;
      flex-wrap: wrap;
      gap: .7rem 2rem;
      margin-top: 2rem;
      padding-top: 1.4rem;
      border-top: 1px solid var(--color-line);
    }

    .hero-mini-list li {
      display: flex;
      flex-direction: column;
      gap: 0;
    }

    .hero-mini-list strong {
      color: var(--color-ink);
      font-size: .95rem;
    }

    .hero-mini-list span {
      color: var(--color-muted);
      font-size: .8rem;
    }

    .hero-visual {
      position: relative;
    }

    .hero-visual img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      border-radius: 24px;
      box-shadow: 0 32px 70px rgba(22, 40, 59, .18);
      border: 5px solid #fff;
    }

    .hero-visual-note {
      position: absolute;
      bottom: -20px;
      left: 26px;
      background: var(--color-ink);
      color: #fff;
      padding: .7rem 1.2rem;
      border-radius: 12px;
      font-size: .86rem;
      box-shadow: 0 12px 25px rgba(10, 27, 42, .25);
    }

    .hero-visual-note strong {
      color: var(--color-neon);
    }

    /* ===== Toolbar ===== */
    .product-library {
      scroll-margin-top: 110px;
    }

    .library-toolbar {
      background: #fff;
      border: 1px solid var(--color-line);
      border-radius: var(--radius-md);
      padding: .8rem 1rem;
      margin: 1.5rem 0 1.25rem;
      box-shadow: var(--shadow-card);
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: .6rem 1rem;
    }

    .toolbar-caption {
      font-size: .76rem;
      color: var(--color-muted);
      font-weight: 650;
      padding-right: .5rem;
      border-right: 1px solid var(--color-line);
      flex: 1 0 160px;
    }

    .filter-bar,
    .sort-tabs {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: .4rem;
    }

    .filter-chip,
    .sort-chip {
      min-height: 36px;
      padding: .3rem .8rem;
      border-radius: 999px;
      background: var(--color-soft);
      color: var(--color-muted);
      font-size: .8rem;
      font-weight: 650;
      border: 1px solid transparent;
      transition: background .18s ease, color .18s ease, border .18s ease;
    }

    .filter-chip:hover,
    .sort-chip:hover {
      background: #DDE8F2;
      color: var(--color-primary-dark);
    }

    .filter-chip.is-active,
    .sort-chip.is-active {
      background: var(--color-ink);
      color: #fff;
      border-color: var(--color-ink);
    }

    /* ===== Product grid ===== */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 1.2rem;
    }

    .product-card {
      background: var(--color-surface);
      border: 1px solid var(--color-line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
      position: relative;
    }

    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(30, 107, 184, .3);
    }

    .card-media {
      position: relative;
      aspect-ratio: 1 / 1;
      background: var(--color-soft);
      overflow: hidden;
    }

    .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .3s ease;
    }

    .product-card:hover .card-media img {
      transform: scale(1.04);
    }

    .badge-sale {
      position: absolute;
      top: .75rem;
      left: .75rem;
      z-index: 2;
      display: inline-block;
      background: rgba(16, 28, 40, .88);
      color: #fff;
      font-size: .72rem;
      font-weight: 700;
      padding: .22rem .62rem;
      border-radius: 999px;
      letter-spacing: .02em;
    }

    .card-body {
      padding: .9rem 1rem 1rem;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .card-sku {
      font-size: .72rem;
      color: var(--color-primary);
      font-weight: 750;
      letter-spacing: .06em;
      text-transform: uppercase;
      margin-bottom: .25rem;
    }

    .card-title {
      font-size: 1rem;
      font-weight: 800;
      color: var(--color-ink);
      line-height: 1.4;
      margin-bottom: .6rem;
    }

    .grid-specs {
      display: flex;
      flex-wrap: wrap;
      gap: .35rem;
      margin-bottom: .8rem;
    }

    .grid-specs span {
      display: inline-flex;
      align-items: center;
      background: var(--color-soft);
      color: var(--color-muted);
      font-size: .75rem;
      font-weight: 600;
      padding: .2rem .55rem;
      border-radius: 6px;
    }

    .spec-note {
      color: var(--color-muted);
      font-size: .8rem;
      line-height: 1.6;
      margin-bottom: .9rem;
    }

    .card-bottom {
      margin-top: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: .6rem;
      border-top: 1px solid var(--color-line);
      padding-top: .8rem;
    }

    .price-box {
      display: flex;
      align-items: baseline;
      gap: .35rem;
    }

    .price-current {
      font-size: 1.2rem;
      font-weight: 850;
      color: var(--color-ink);
    }

    .price-original {
      font-size: .76rem;
      color: var(--color-muted);
      text-decoration: line-through;
    }

    .card-bottom .btn-add {
      white-space: nowrap;
    }

    .empty-filter {
      display: none;
      text-align: center;
      color: var(--color-muted);
      padding: 2rem 0;
    }

    /* ===== Promise ===== */
    .promise-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 1.2rem;
    }

    .promise-card {
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      padding: 1.5rem 1.3rem;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--color-line);
      transition: transform .2s ease, box-shadow .2s ease;
    }

    .promise-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }

    .promise-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: var(--color-soft);
      color: var(--color-primary);
      font-size: 1.3rem;
      font-weight: 800;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: .8rem;
    }

    .promise-card h3 {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--color-ink);
      margin-bottom: .4rem;
    }

    .promise-card p {
      color: var(--color-muted);
      font-size: .86rem;
      line-height: 1.75;
      margin: 0;
    }

    /* ===== Scenario & Flow ===== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 1.2rem;
      margin-top: 1.6rem;
    }

    .scenario-card {
      background: var(--color-surface);
      border: 1px solid var(--color-line);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
      box-shadow: var(--shadow-card);
    }

    .scenario-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: .6rem;
      color: var(--color-ink);
    }

    .scenario-card p {
      font-size: .88rem;
      color: var(--color-muted);
      line-height: 1.75;
      margin-bottom: .9rem;
    }

    .scenario-card ul {
      display: grid;
      gap: .55rem;
    }

    .scenario-card li {
      position: relative;
      padding-left: 1.1rem;
      font-size: .84rem;
      color: var(--color-ink);
    }

    .scenario-card li::before {
      content: "";
      position: absolute;
      left: 0;
      top: .62em;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--color-neon);
      box-shadow: 0 0 0 3px rgba(36, 198, 176, .12);
    }

    .flow-panel {
      margin-top: 1.8rem;
      background: var(--color-surface);
      border: 1px solid var(--color-line);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      padding: clamp(1.2rem, 3vw, 2rem);
    }

    .flow-panel h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 1.2rem;
    }

    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 1rem;
      counter-reset: step;
    }

    .flow-step {
      counter-increment: step;
      position: relative;
      padding: 1rem .9rem;
      background: var(--color-soft);
      border-radius: 13px;
      min-height: 120px;
    }

    .flow-step::before {
      content: "0" counter(step);
      display: block;
      font-size: .74rem;
      font-weight: 850;
      color: var(--color-primary);
      letter-spacing: .12em;
      margin-bottom: .4rem;
    }

    .flow-step h4 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: .3rem;
    }

    .flow-step p {
      font-size: .82rem;
      color: var(--color-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 840px;
      margin: 1.8rem auto 0;
      display: grid;
      gap: .75rem;
    }

    .faq-item {
      background: var(--color-surface);
      border: 1px solid var(--color-line);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    .faq-item:hover {
      border-color: rgba(30, 107, 184, .25);
      box-shadow: var(--shadow-hover);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1rem 1.2rem;
      cursor: pointer;
      list-style: none;
      color: var(--color-ink);
      font-size: .96rem;
      font-weight: 700;
      line-height: 1.5;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "＋";
      flex: 0 0 auto;
      font-size: 1.2rem;
      color: var(--color-primary);
      transition: transform .2s ease, color .2s ease;
    }

    .faq-item[open] summary::after {
      content: "－";
      color: var(--color-neon);
    }

    .faq-item .answer {
      padding: 0 1.2rem 1.2rem;
      color: var(--color-muted);
      font-size: .89rem;
      line-height: 1.85;
      border-top: 1px solid var(--color-line);
      padding-top: .9rem;
      margin: 0 .2rem .2rem 0;
    }

    /* ===== CTA ===== */
    .cta-panel {
      background:
        linear-gradient(96deg, rgba(10, 27, 42, .95) 0%, rgba(10, 27, 42, .82) 60%, rgba(10, 27, 42, .7) 100%),
        url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
      color: #fff;
      border-radius: 24px;
      padding: clamp(2.2rem, 5vw, 4rem);
      box-shadow: 0 28px 60px rgba(10, 27, 42, .26);
      position: relative;
      overflow: hidden;
    }

    .cta-panel h2 {
      font-size: clamp(1.5rem, 2.5vw, 2.2rem);
      font-weight: 850;
      max-width: 14em;
      letter-spacing: -0.02em;
    }

    .cta-panel p {
      color: rgba(255, 255, 255, .78);
      max-width: 42rem;
      margin-top: .8rem;
      line-height: 1.85;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: .8rem;
      margin-top: 1.6rem;
    }

    .cta-note {
      display: block;
      margin-top: 1.25rem;
      color: rgba(255, 255, 255, .62);
      font-size: .8rem;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--color-nav-bg);
      color: rgba(255, 255, 255, .76);
      margin-top: 0;
    }

    .footer-top {
      padding: 3.4rem 0 2.2rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
      gap: 2rem;
    }

    .footer-brand .brand {
      font-size: 1.6rem;
    }

    .footer-brand p {
      margin-top: 1rem;
      font-size: .87rem;
      color: rgba(255, 255, 255, .62);
      line-height: 1.9;
      max-width: 20rem;
    }

    .footer-col h3 {
      color: #fff;
      font-size: .92rem;
      font-weight: 750;
      margin-bottom: .9rem;
      letter-spacing: .04em;
    }

    .footer-col ul {
      display: grid;
      gap: .45rem;
    }

    .footer-col a {
      display: inline-block;
      color: rgba(255, 255, 255, .68);
      transition: color .2s ease, transform .2s ease;
      font-size: .88rem;
    }

    .footer-col a:hover {
      color: var(--color-neon);
      transform: translateX(2px);
    }

    .footer-contact-list {
      color: rgba(255, 255, 255, .68);
      font-size: .87rem;
      line-height: 1.8;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .12);
      padding: 1.2rem 0;
    }

    .footer-bottom-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: .6rem;
      font-size: .82rem;
      color: rgba(255, 255, 255, .55);
    }

    .back-top {
      color: rgba(255, 255, 255, .7);
      padding: .25rem .5rem;
      border-radius: 6px;
    }

    .back-top:hover {
      color: var(--color-neon);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1100px) {
      .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 1.5rem;
      }

      .promise-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
      }

      .scenario-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem 1.2rem;
      }
    }

    @media (max-width: 1024px) {
      .nav-links,
      .header-cta-wrap .btn-nav-cta {
        display: none !important;
      }

      .menu-toggle {
        display: inline-flex;
      }

      .hero-grid {
        grid-template-columns: 1fr;
      }

      .hero-visual {
        max-width: 720px;
      }

      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .container-site {
        width: min(100% - 1.4rem, 1240px);
      }

      .header-inner {
        height: 64px;
      }

      .brand,
      .mobile-drawer .brand {
        font-size: 1.25rem;
      }

      .product-grid {
        grid-template-columns: 1fr;
      }

      .promise-grid {
        grid-template-columns: 1fr;
      }

      .hero-mini-list {
        flex-direction: column;
        gap: .8rem;
      }

      .card-media {
        aspect-ratio: 1.2 / 1;
      }

      .toolbar-caption {
        flex: 1 0 100%;
        border-right: 0;
        padding-right: 0;
      }

      .filter-bar,
      .sort-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: .2rem;
      }

      .filter-chip,
      .sort-chip {
        flex: 0 0 auto;
      }

      .flow-steps {
        grid-template-columns: 1fr;
      }

      .flow-step {
        min-height: auto;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.6rem;
      }

      .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
      }

      .cta-panel {
        padding: 2rem 1.2rem;
        border-radius: 18px;
      }

      .btn-lg {
        width: 100%;
      }

      .hero-visual-note {
        left: 12px;
        bottom: -14px;
        padding: .55rem .85rem;
        font-size: .75rem;
      }
    }

/* roulang page: category4 */
:root {
    --color-bg: #F7F9FC;
    --color-surface: #FFFFFF;
    --color-soft: #EAF0F5;
    --color-line: #DCE6ED;
    --color-primary: #1E6BB8;
    --color-primary-dark: #145294;
    --color-accent-teal: #24C6B0;
    --color-warm-cta: #F0A92E;
    --color-ink: #16283B;
    --color-muted: #5C6F7E;
    --color-nav-bg: #0A1B2A;
    --color-panel-deep: #0E2233;
    --color-neon: #39E7C2;
    --color-cta-fg: #101C28;
    --radius-card: 16px;
    --radius-btn: 10px;
    --shadow-card: 0 10px 30px rgba(27, 52, 78, .08);
    --shadow-hover: 0 18px 42px rgba(24, 53, 82, .14);
    --container-width: 1240px;
    --header-h: 74px;
  }

  * {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    line-height: 1.65;
    font-size: 16px;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  button {
    font-family: inherit;
    cursor: pointer;
  }
  ul, p, h1, h2, h3, h4 {
    margin: 0;
  }

  :focus-visible {
    outline: 3px solid rgba(57, 231, 194, .45);
    outline-offset: 3px;
    border-radius: 6px;
  }

  .container-site {
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  .brand {
    display: inline-flex;
    align-items: baseline;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -.5px;
    color: #fff;
    white-space: nowrap;
  }
  .brand .brand-accent {
    color: var(--color-neon);
    font-weight: 700;
    margin-left: 3px;
    text-shadow: 0 0 18px rgba(57, 231, 194, .36);
  }

  /* ========= Header & nav ========= */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 90;
    background: var(--color-nav-bg);
    box-shadow: 0 8px 30px rgba(7, 20, 31, .22);
  }
  .neon-line {
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, rgba(57, 231, 194, .18) 12%, var(--color-neon) 50%, rgba(57, 231, 194, .14) 88%, transparent 100%);
  }
  .header-bar {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
    margin-right: 16px;
  }
  .nav-item {
    position: relative;
  }
  .nav-link,
  .dropdown-title {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    height: 46px;
    padding: 0 16px;
    color: rgba(255, 255, 255, .78);
    font-size: 15px;
    font-weight: 600;
    border: 0;
    background: transparent;
    border-radius: 10px;
    transition: color .2s ease, background .2s ease;
  }
  .nav-link:hover,
  .dropdown-title:hover,
  .nav-item.is-active > .nav-link,
  .nav-item.has-dropdown.is-active > .dropdown-title {
    color: #fff;
    background: rgba(57, 231, 194, .07);
  }
  .nav-link::after,
  .dropdown-title::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 10px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-neon);
    box-shadow: 0 0 12px rgba(57, 231, 194, .72);
    opacity: 0;
    transform: scaleX(.5);
    transition: opacity .2s ease, transform .2s ease;
  }
  .nav-link:hover::after,
  .nav-item.has-dropdown:hover > .dropdown-title::after,
  .nav-item.is-active > .nav-link::after,
  .nav-item.has-dropdown.is-active > .dropdown-title::after {
    opacity: 1;
    transform: scaleX(1);
  }

  .dropdown-title svg {
    margin-left: 4px;
  }

  .dropdown-panel {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: 320px;
    padding: 12px;
    background: #0C1F2F;
    border: 1px solid rgba(57, 231, 194, .18);
    border-radius: 16px;
    box-shadow: 0 24px 46px rgba(2, 10, 18, .38);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s ease, transform .22s ease, visibility .22s ease;
  }
  .nav-item.has-dropdown:hover .dropdown-panel,
  .nav-item.has-dropdown:focus-within .dropdown-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  .dropdown-panel a {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 12px 14px;
    border-radius: 12px;
    color: rgba(255, 255, 255, .82);
    font-size: 15px;
    font-weight: 600;
    transition: background .2s ease, color .2s ease, padding .2s ease;
  }
  .dropdown-panel a small {
    color: rgba(255, 255, 255, .5);
    font-size: 12px;
    font-weight: 400;
  }
  .dropdown-panel a:hover,
  .dropdown-panel a.is-current {
    background: rgba(57, 231, 194, .12);
    color: var(--color-neon);
    padding-left: 18px;
  }
  .dropdown-panel a:hover small,
  .dropdown-panel a.is-current small {
    color: rgba(255, 255, 255, .64);
  }

  .header-actions {
    display: flex;
    align-items: center;
  }
  .btn-head-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 20px;
    background: var(--color-warm-cta);
    color: var(--color-cta-fg);
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-btn);
    box-shadow: 0 6px 18px rgba(240, 169, 46, .22);
    transition: transform .18s ease, box-shadow .2s ease, background .2s ease;
    white-space: nowrap;
  }
  .btn-head-cta:hover {
    background: #febe4c;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(240, 169, 46, .3);
  }
  .btn-head-cta:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(240, 169, 46, .26);
  }

  .menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    color: #fff;
    font-size: 24px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 12px;
  }

  .mobile-drawer {
    position: fixed;
    top: calc(var(--header-h) + 3px);
    bottom: 0;
    left: 0;
    width: min(88vw, 360px);
    background: var(--color-nav-bg);
    border-right: 1px solid rgba(255, 255, 255, .06);
    z-index: 95;
    padding: 22px 20px 36px;
    overflow-y: auto;
    transform: translateX(-110%);
    transition: transform .26s ease;
  }
  .mobile-drawer.is-open {
    transform: translateX(0);
  }
  .drawer-scrim {
    position: fixed;
    inset: 0;
    background: rgba(5, 13, 20, .55);
    opacity: 0;
    visibility: hidden;
    transition: opacity .24s ease, visibility .24s ease;
    z-index: 94;
  }
  .drawer-scrim.is-open {
    opacity: 1;
    visibility: visible;
  }
  .mobile-nav-label {
    display: block;
    padding: 10px 12px 8px;
    color: var(--color-neon);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
  }
  .mobile-drawer a {
    display: block;
    padding: 12px 12px;
    border-radius: 12px;
    color: rgba(255, 255, 255, .78);
    font-size: 16px;
    font-weight: 500;
  }
  .mobile-drawer a:hover {
    color: #fff;
    background: rgba(57, 231, 194, .1);
  }
  .mobile-drawer .drawer-current {
    color: var(--color-neon);
    background: rgba(57, 231, 194, .1);
  }

  /* ========= Category hero ========= */
  .category-hero {
    background: linear-gradient(135deg, #E3F3FF 0%, #F7F9FC 62%, rgba(57, 231, 194, .06) 100%);
    border-bottom: 1px solid var(--color-line);
    padding: 74px 0 84px;
  }
  .hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    align-items: center;
    gap: 52px;
  }
  .category-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 13px;
    color: var(--color-primary-dark);
    background: rgba(30, 107, 184, .09);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
  }
  .category-eyebrow svg {
    width: 15px;
    height: 15px;
  }
  .category-hero h1 {
    font-size: clamp(31px, 4.1vw, 52px);
    line-height: 1.18;
    color: var(--color-ink);
    letter-spacing: -.7px;
    font-weight: 800;
    margin: 18px 0 18px;
    max-width: 700px;
  }
  .category-hero h1 .hero-accent {
    color: var(--color-primary);
  }
  .category-hero .hero-summary {
    font-size: 17px;
    color: var(--color-muted);
    line-height: 1.8;
    max-width: 600px;
    margin-bottom: 26px;
  }
  .hero-points {
    margin: 0 0 28px;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    max-width: 580px;
  }
  .hero-points li {
    position: relative;
    padding-left: 28px;
    color: #2D4052;
    font-size: 15px;
  }
  .hero-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(36, 198, 176, .18);
    box-shadow: inset 0 0 0 4px var(--color-accent-teal);
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .btn-primary,
  .btn-ghost,
  .btn-card,
  .btn-cta-panel,
  .btn-outline-panel {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 24px;
    border-radius: var(--radius-btn);
    font-weight: 700;
    font-size: 15px;
    transition: transform .18s ease, box-shadow .18s ease, background .2s ease, border-color .2s ease;
    border: 1px solid transparent;
  }
  .btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(30, 107, 184, .22);
  }
  .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(30, 107, 184, .28);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-ghost {
    background: var(--color-surface);
    color: var(--color-primary-dark);
    border-color: #C5D6E5;
  }
  .btn-ghost:hover {
    border-color: var(--color-primary);
    background: #F2F8FF;
    transform: translateY(-2px);
  }
  .btn-ghost:active {
    transform: translateY(0);
  }

  .hero-media {
    position: relative;
  }
  .hero-media::before {
    content: "";
    position: absolute;
    inset: 12px -12px -12px 12px;
    background: linear-gradient(135deg, rgba(30, 107, 184, .12), rgba(36, 198, 176, .14));
    border-radius: 28px;
    z-index: 0;
  }
  .hero-media img {
    position: relative;
    z-index: 1;
    width: 100%;
    aspect-ratio: 4 / 3.1;
    object-fit: cover;
    border-radius: 24px;
    border: 4px solid rgba(255, 255, 255, .72);
    box-shadow: var(--shadow-hover);
  }

  /* ========= filter strip ========= */
  .filter-zone {
    padding: 32px 0 8px;
    border-bottom: 1px solid var(--color-line);
    background: var(--color-surface);
  }
  .filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
  }
  .filter-label {
    font-size: 15px;
    font-weight: 800;
    color: var(--color-ink);
    margin-right: 6px;
  }
  .chip {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid var(--color-line);
    background: #fff;
    color: var(--color-muted);
    font-size: 13px;
    font-weight: 600;
    transition: border-color .2s ease, background .2s ease, color .2s ease;
  }
  .chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #F3F9FF;
  }
  .chip.is-active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    box-shadow: 0 6px 16px rgba(30, 107, 184, .16);
  }
  .filter-sort-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 22px;
    padding-bottom: 20px;
    flex-wrap: wrap;
  }
  .filter-count {
    color: var(--color-muted);
    font-size: 14px;
  }
  .sort-tools {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
  }
  .sort-tools span {
    color: var(--color-muted);
    font-size: 14px;
    margin-right: 4px;
  }
  .sort-btn {
    height: 34px;
    padding: 0 12px;
    border-radius: 9px;
    color: var(--color-muted);
    background: #FBFCFE;
    border: 1px solid var(--color-line);
    font-size: 13px;
    transition: border-color .2s ease, color .2s ease;
  }
  .sort-btn:hover,
  .sort-btn.is-active {
    border-color: var(--color-primary);
    color: var(--color-primary);
  }

  /* ========= product grid ========= */
  .product-section {
    padding: 68px 0 64px;
  }
  .section-head {
    margin-bottom: 30px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
  }
  .section-title {
    font-size: clamp(24px, 2.8vw, 34px);
    font-weight: 800;
    letter-spacing: -.4px;
    color: var(--color-ink);
    line-height: 1.25;
  }
  .section-sub {
    color: var(--color-muted);
    font-size: 15px;
    max-width: 520px;
    line-height: 1.7;
    margin-top: 6px;
  }

  .product-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }
  .product-card {
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    display: flex;
    flex-direction: column;
  }
  .product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(30, 107, 184, .24);
  }
  .product-media {
    position: relative;
    background: var(--color-soft);
    aspect-ratio: 4 / 3.1;
    overflow: hidden;
  }
  .product-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s ease;
  }
  .product-card:hover .product-media img {
    transform: scale(1.035);
  }
  .product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    height: 26px;
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 7px;
    color: #fff;
    background: var(--color-warm-cta);
    box-shadow: 0 4px 12px rgba(240, 169, 46, .26);
  }
  .badge-new {
    background: var(--color-accent-teal);
    box-shadow: 0 4px 12px rgba(36, 198, 176, .22);
  }
  .product-body {
    padding: 18px 18px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }
  .product-tag {
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .4px;
    margin-bottom: 6px;
  }
  .product-title {
    display: block;
    font-size: 17px;
    font-weight: 800;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 8px;
  }
  .product-desc {
    font-size: 13.5px;
    color: var(--color-muted);
    line-height: 1.65;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 44px;
  }
  .product-spec {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
    margin-bottom: 16px;
  }
  .spec-pill {
    padding: 5px 9px;
    border-radius: 7px;
    background: #F0F6FC;
    color: #2E516F;
    font-size: 12px;
    font-weight: 600;
  }
  .product-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }
  .product-price {
    font-size: 15px;
    font-weight: 800;
    color: #C4451D;
  }
  .product-price small {
    font-size: 12px;
    color: var(--color-muted);
    font-weight: 500;
    margin-left: 2px;
  }
  .btn-card {
    height: 38px;
    padding: 0 15px;
    font-size: 13px;
    background: var(--color-ink);
    color: #fff;
  }
  .btn-card:hover {
    background: var(--color-primary);
    box-shadow: 0 8px 16px rgba(30, 107, 184, .24);
    transform: translateY(-2px);
  }
  .btn-card:active {
    transform: translateY(0);
  }

  /* ========= service strip ========= */
  .service-zone {
    padding: 62px 0;
    background: #F0FAF8;
    border-top: 1px solid rgba(36, 198, 176, .12);
    border-bottom: 1px solid var(--color-line);
  }
  .service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .service-card {
    padding: 24px;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    border: 1px solid rgba(36, 198, 176, .2);
    box-shadow: 0 8px 22px rgba(24, 61, 58, .05);
  }
  .service-icon {
    flex: none;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(36, 198, 176, .14);
    color: #108A7A;
    font-size: 20px;
    margin-bottom: 14px;
  }
  .service-card h3 {
    font-size: 17px;
    margin-bottom: 7px;
  }
  .service-card p {
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.75;
  }

  /* ========= FAQ ========= */
  .faq-zone {
    padding: 70px 0 62px;
  }
  .faq-panel {
    max-width: 920px;
    margin: 0 auto;
    display: grid;
    gap: 13px;
  }
  .faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color .2s ease, box-shadow .2s ease;
  }
  .faq-item.open {
    border-color: rgba(30, 107, 184, .22);
    box-shadow: 0 10px 26px rgba(25, 55, 83, .07);
  }
  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    width: 100%;
    padding: 17px 20px;
    background: transparent;
    border: 0;
    text-align: left;
    color: #223446;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.5;
  }
  .faq-icon {
    flex: none;
    color: var(--color-primary);
    font-size: 20px;
    transition: transform .22s ease;
  }
  .faq-item.open .faq-icon {
    transform: rotate(45deg);
  }
  .faq-answer {
    display: none;
    padding: 0 20px 20px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.85;
    max-width: 760px;
  }
  .faq-item.open .faq-answer {
    display: block;
  }

  /* ========= CTA ========= */
  .category-cta {
    padding: 74px 0;
    background:
      linear-gradient(135deg, rgba(10, 27, 42, .96), rgba(14, 38, 54, .94)),
      radial-gradient(circle at 24% 28%, rgba(57, 231, 194, .12), transparent 32%);
    color: #fff;
  }
  .cta-inner {
    display: grid;
    grid-template-columns: 1.25fr .75fr;
    gap: 40px;
    align-items: center;
  }
  .cta-inner .cta-kicker {
    color: var(--color-neon);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
  }
  .cta-inner h2 {
    font-size: clamp(24px, 3vw, 38px);
    margin: 10px 0 14px;
    line-height: 1.25;
    letter-spacing: -.4px;
  }
  .cta-inner p {
    color: rgba(255, 255, 255, .76);
    font-size: 15px;
    max-width: 640px;
    line-height: 1.8;
  }
  .cta-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }
  .btn-cta-panel {
    height: 50px;
    background: var(--color-warm-cta);
    color: var(--color-cta-fg);
    box-shadow: 0 10px 26px rgba(240, 169, 46, .24);
  }
  .btn-cta-panel:hover {
    background: #febe4c;
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(240, 169, 46, .32);
  }
  .btn-outline-panel {
    height: 50px;
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, .34);
  }
  .btn-outline-panel:hover {
    border-color: var(--color-neon);
    color: var(--color-neon);
    transform: translateY(-2px);
  }
  .cta-card {
    border: 1px solid rgba(255, 255, 255, .1);
    background: rgba(255, 255, 255, .05);
    border-radius: 18px;
    padding: 22px;
  }
  .cta-card .hours-line {
    color: rgba(255, 255, 255, .7);
    font-size: 14px;
    padding: 9px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
  }
  .cta-card .hours-line strong {
    color: #fff;
    display: block;
    margin-bottom: 2px;
  }
  .cta-phone-link {
    display: inline-block;
    margin-top: 14px;
    color: var(--color-neon);
    font-weight: 700;
    font-size: 14px;
    word-break: break-all;
  }

  /* ========= footer ========= */
  .site-footer {
    background: #081725;
    color: rgba(255, 255, 255, .66);
    border-top: 2px solid rgba(57, 231, 194, .28);
  }
  .footer-top {
    padding: 62px 24px 50px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.45fr 1fr 1fr 1fr;
    gap: 36px;
  }
  .footer-brand .brand {
    font-size: 25px;
    margin-bottom: 16px;
  }
  .footer-brand p {
    font-size: 14px;
    line-height: 1.85;
    max-width: 330px;
  }
  .footer-col h3 {
    color: #fff;
    font-size: 15px;
    margin: 0 0 14px;
    font-weight: 800;
  }
  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 9px;
  }
  .footer-col ul li {
    font-size: 14px;
  }
  .footer-col ul a {
    color: rgba(255, 255, 255, .64);
    transition: color .2s ease, padding .2s ease;
  }
  .footer-col ul a:hover {
    color: var(--color-neon);
    padding-left: 4px;
  }
  .footer-contact-list li {
    line-height: 1.6;
  }
  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .07);
    padding: 22px 0;
  }
  .footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 13px;
  }
  .back-top {
    color: rgba(255, 255, 255, .7);
    font-weight: 500;
  }
  .back-top:hover {
    color: var(--color-neon);
  }

  /* ========= responsive ========= */
  @media (max-width: 1100px) {
    .nav-link,
    .dropdown-title {
      padding: 0 11px;
      font-size: 14px;
    }
    .btn-head-cta {
      padding: 0 14px;
      font-size: 13px;
    }
    .product-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 900px) {
    .nav-links {
      display: none;
    }
    .menu-toggle {
      display: inline-flex;
    }
    .hero-grid {
      grid-template-columns: 1fr;
    }
    .category-hero {
      padding: 56px 0 62px;
    }
    .hero-media {
      order: -1;
    }
    .hero-media img {
      aspect-ratio: 16 / 10;
    }
    .service-grid {
      grid-template-columns: 1fr;
    }
    .cta-inner {
      grid-template-columns: 1fr;
    }
    .product-section,
    .faq-zone {
      padding-top: 52px;
      padding-bottom: 48px;
    }
    .category-cta {
      padding: 56px 0;
    }
  }

  @media (max-width: 760px) {
    .brand {
      font-size: 22px;
    }
    .header-bar {
      gap: 12px;
    }
    .btn-head-cta {
      display: none;
    }
    .container-site {
      padding-left: 18px;
      padding-right: 18px;
    }
    .product-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }
    .product-body {
      padding: 14px 14px 16px;
    }
    .product-title {
      font-size: 15px;
    }
    .product-desc {
      -webkit-line-clamp: 3;
      min-height: 60px;
    }
    .btn-card {
      padding: 0 11px;
    }
    .filter-sort-row {
      align-items: flex-start;
      flex-direction: column;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 26px;
    }
    .category-hero h1 {
      font-size: 30px;
      letter-spacing: -0.3px;
    }
    .hero-points li {
      font-size: 14px;
    }
    .faq-panel {
      gap: 10px;
    }
  }

  @media (max-width: 520px) {
    .product-grid {
      grid-template-columns: 1fr;
    }
    .hero-actions {
      flex-direction: column;
      align-items: stretch;
    }
    .category-hero .hero-summary {
      font-size: 15px;
    }
    .section-title {
      font-size: 24px;
    }
    .chip {
      height: 34px;
      font-size: 12px;
      padding: 0 12px;
    }
    .cta-actions {
      flex-direction: column;
      align-items: stretch;
    }
    .btn-cta-panel,
    .btn-outline-panel {
      width: 100%;
    }
  }

/* roulang page: category3 */
:root {
    --bg: #F7F9FC;
    --surface: #FFFFFF;
    --soft: #EAF0F5;
    --line: #DCE6ED;
    --primary: #1E6BB8;
    --primary-dark: #145294;
    --accent-teal: #24C6B0;
    --warm-cta: #F0A92E;
    --price-fg: #B36A00;
    --ink: #16283B;
    --muted: #5C6F7E;
    --nav-bg: #0A1B2A;
    --neon: #39E7C2;
    --cta-fg: #101C28;
    --radius-card: 16px;
    --radius-btn: 10px;
    --shadow-card: 0 12px 24px -18px rgba(20, 36, 48, 0.4);
    --shadow-hover: 0 24px 40px -20px rgba(20, 36, 48, 0.46);
  }

  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-padding-top: 104px; scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; cursor: pointer; }
  input, select, textarea { font: inherit; }
  a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 3px solid rgba(57, 231, 194, 0.55);
    outline-offset: 3px;
    border-radius: 6px;
  }
  .container-site {
    width: min(1240px, 100% - 48px);
    margin-inline: auto;
  }
  .section-block { padding-block: 84px; }

  /* 顶部霓虹开头线 */
  .top-neon {
    height: 2px;
    background: linear-gradient(90deg, rgba(57,231,194,0) 0%, var(--neon) 14%, #46C6DC 50%, var(--neon) 86%, rgba(57,231,194,0) 100%);
  }

  /* Header 深色导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    background: var(--nav-bg);
    color: #fff;
    box-shadow: 0 8px 24px rgba(4, 12, 20, 0.35);
  }
  .navbar-inner {
    display: flex;
    align-items: center;
    min-height: 76px;
    gap: 18px;
  }
  .brand {
    display: inline-flex;
    align-items: baseline;
    white-space: nowrap;
    font-size: 1.72rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: #fff;
    line-height: 1.2;
  }
  .brand .brand-accent {
    color: var(--neon);
    margin-left: 1px;
    text-shadow: 0 0 14px rgba(57,231,194,.34);
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-inline: auto;
  }
  .nav-item { position: relative; display: flex; }
  .nav-link,
  .dropdown-title {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 16px 12px;
    color: rgba(255,255,255,.72);
    font-weight: 600;
    font-size: 15px;
    background: transparent;
    border: 0;
    position: relative;
    transition: color .2s ease, text-shadow .2s ease;
  }
  .nav-link::after,
  .dropdown-title::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 10px;
    height: 2px;
    background: var(--neon);
    border-radius: 2px;
    box-shadow: 0 0 12px rgba(57,231,194,.8);
    opacity: 0;
    transform: scaleX(.5);
    transition: opacity .2s ease, transform .2s ease;
  }
  .nav-link:hover,
  .dropdown-title:hover,
  .nav-item.is-active .nav-link,
  .nav-item.is-active .dropdown-title {
    color: #fff;
    text-shadow: 0 0 12px rgba(57,231,194,.25);
  }
  .nav-link:hover::after,
  .nav-link.is-active::after,
  .dropdown-title:hover::after,
  .nav-item.is-active .nav-link::after,
  .nav-item.is-active .dropdown-title::after {
    opacity: 1;
    transform: scaleX(1);
  }
  .dropdown-panel {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    width: 540px;
    transform: translateX(-50%) translateY(8px);
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    background: #0F293C;
    border: 1px solid rgba(57,231,194,.22);
    border-radius: var(--radius-card);
    color: #fff;
    box-shadow: 0 24px 45px rgba(2,10,18,.5);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    z-index: 90;
  }
  .has-dropdown:hover .dropdown-panel,
  .has-dropdown:focus-within .dropdown-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
  }
  .dropdown-panel a {
    display: block;
    padding: 13px 15px 12px;
    border-radius: 12px;
    background: rgba(255,255,255,.05);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    line-height: 1.3;
    border: 1px solid transparent;
    transition: background .2s ease, border-color .2s ease;
  }
  .dropdown-panel a small {
    display: block;
    margin-top: 4px;
    color: rgba(255,255,255,.62);
    font-weight: 400;
    font-size: 12px;
    line-height: 1.5;
  }
  .dropdown-panel a:hover,
  .dropdown-panel a.is-current {
    background: rgba(57,231,194,.12);
    border-color: rgba(57,231,194,.45);
  }
  .header-actions { display: flex; align-items: center; gap: 10px; }
  .btn-nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--warm-cta);
    color: var(--cta-fg);
    font-weight: 700;
    font-size: 14px;
    padding: 10px 16px;
    border-radius: var(--radius-btn);
    border: 1px solid transparent;
    white-space: nowrap;
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
  }
  .btn-nav-cta:hover {
    background: #FFC251;
    transform: translateY(-1px);
    box-shadow: 0 8px 16px -10px rgba(240,169,46,.9);
  }
  .btn-nav-cta:active { transform: translateY(0); }

  /* 移动端抽屉 */
  .nav-toggle {
    display: none;
    width: 46px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: #fff;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
  }
  .nav-toggle span,
  .nav-toggle span::before,
  .nav-toggle span::after {
    content: "";
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform .22s ease, opacity .22s ease;
  }
  .nav-toggle span { position: relative; }
  .nav-toggle span::before { position: absolute; top: -6px; }
  .nav-toggle span::after { position: absolute; top: 6px; }
  .nav-toggle[aria-expanded="true"] span { background: transparent; }
  .nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }
  .mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 110;
    width: min(88vw, 360px);
    background: #0A1B2A;
    color: #fff;
    padding: 108px 26px 40px;
    box-shadow: -20px 0 60px rgba(2,10,18,.55);
    transform: translateX(105%);
    visibility: hidden;
    transition: transform .3s ease, visibility .3s ease;
    overflow-y: auto;
  }
  .mobile-drawer a {
    display: block;
    padding: 13px 8px;
    color: rgba(255,255,255,.82);
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    transition: background .2s ease, color .2s ease;
  }
  .mobile-drawer a:hover { color: #fff; background: rgba(255,255,255,.08); }
  .mobile-drawer .mobile-group-title {
    display: block;
    padding: 20px 8px 8px;
    color: rgba(255,255,255,.45);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .04em;
  }
  .mobile-drawer .mobile-sub-link { padding-left: 20px; }
  .site-header.is-open .mobile-drawer {
    transform: translateX(0);
    visibility: visible;
  }
  body.drawer-open { overflow: hidden; }

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-btn);
    border: 1px solid transparent;
    font-weight: 700;
    font-size: 15px;
    line-height: 1.3;
    transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
  }
  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 18px -14px rgba(30,107,184,.8);
  }
  .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
  .btn-primary:active { transform: translateY(0); }
  .btn-line {
    background: transparent;
    color: var(--primary-dark);
    border-color: rgba(20,82,148,.35);
  }
  .btn-line:hover {
    background: rgba(30,107,184,.08);
    border-color: var(--primary);
    transform: translateY(-2px);
  }
  .btn-line:active { transform: translateY(0); }
  .btn-block {
    display: flex;
    width: 100%;
  }

  /* Hero 分类导航底 */
  .category-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #EFF5F9, #F7F9FC);
    border-bottom: 1px solid #E1EBF1;
    padding: 92px 0 86px;
  }
  .category-hero-inner {
    display: grid;
    grid-template-columns: 1.06fr .94fr;
    gap: 58px;
    align-items: center;
  }
  .hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    background: rgba(30,107,184,.09);
    border: 1px solid rgba(30,107,184,.16);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
  }
  .hero-kicker .split-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--accent-teal); }
  .category-hero h1 {
    margin: 18px 0 18px;
    max-width: 700px;
    color: #102A3F;
    font-size: clamp(2rem, 3.4vw, 3.1rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
    font-weight: 800;
  }
  .category-hero h1 .h1-accent {
    color: var(--primary);
    position: relative;
  }
  .hero-lead {
    max-width: 610px;
    margin: 0 0 28px;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.85;
  }
  .hero-action-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
  .hero-proof {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted);
    font-size: 14px;
  }
  .hero-proof-row { display: inline-flex; align-items: center; gap: 6px; }
  .hero-proof-row i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-teal);
  }
  .hero-media {
    position: relative;
    border-radius: 20px;
  }
  .hero-media img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 28px 52px -28px rgba(20,36,48,.44);
    border: 1px solid rgba(255,255,255,.7);
  }
  .hero-media::before {
    content: "";
    position: absolute;
    inset: -18px -12px -8px -4px;
    background: linear-gradient(135deg, rgba(36,198,176,.16), rgba(30,107,184,.12));
    border-radius: 32px;
    z-index: -1;
    transform: rotate(-2deg);
  }

  /* 筛选与商品区 */
  .product-section { background: var(--bg); }
  .section-head { max-width: 780px; margin-bottom: 26px; }
  .section-head.centered { margin-inline: auto; text-align: center; }
  .section-kicker {
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .08em;
    margin: 0 0 8px;
  }
  .section-head h2 {
    margin: 0 0 12px;
    color: #12283C;
    font-size: clamp(1.7rem, 2.6vw, 2.3rem);
    line-height: 1.28;
    letter-spacing: -0.02em;
  }
  .section-head p {
    margin: 0;
    color: var(--muted);
    font-size: 16px;
  }
  .filter-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    margin: 22px 0 34px;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid rgba(220,230,237,.85);
    border-radius: 14px;
    box-shadow: var(--shadow-card);
    flex-wrap: wrap;
  }
  .filter-group { display: flex; flex-wrap: wrap; gap: 8px; }
  .filter-chip {
    display: inline-flex;
    align-items: center;
    padding: 7px 13px;
    border-radius: 999px;
    background: var(--soft);
    color: #29435A;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: background .2s ease, color .2s ease;
  }
  .filter-chip.is-selected {
    background: var(--primary-dark);
    color: #fff;
    box-shadow: 0 6px 10px -8px rgba(20,82,148,.7);
  }
  .sort-note {
    color: var(--muted);
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .sort-note::before {
    content: "";
    width: 1px;
    height: 16px;
    background: var(--line);
    margin-right: 4px;
  }

  .product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
  }
  .product-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid rgba(220,230,237,.9);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }
  .product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(30,107,184,.32);
  }
  .product-media {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--soft);
  }
  .product-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .55s ease;
  }
  .product-card:hover .product-media img { transform: scale(1.05); }
  .product-badge {
    position: absolute;
    left: 14px;
    top: 14px;
    background: rgba(10,27,42,.76);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 10px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
  }
  .product-card-body {
    display: flex;
    flex-direction: column;
    padding: 18px 18px 16px;
  }
  .product-card-body h3 {
    margin: 0 0 10px;
    font-size: 1.08rem;
    line-height: 1.4;
    color: #12283C;
    font-weight: 800;
  }
  .product-spec-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
  }
  .product-spec {
    background: var(--soft);
    color: #40556A;
    border-radius: 7px;
    padding: 4px 9px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
  }
  .product-desc {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: .85rem;
    line-height: 1.7;
  }
  .product-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    border-top: 1px solid #ECF1F5;
    padding-top: 13px;
  }
  .product-price {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
  }
  .product-price strong {
    color: var(--price-fg);
    font-size: 1.45rem;
    font-weight: 800;
  }
  .product-price strong small { font-size: .9rem; }
  .product-price span {
    color: var(--muted);
    font-size: 12px;
    margin-top: 3px;
  }
  .btn-buy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 16px;
    background: var(--warm-cta);
    color: var(--cta-fg);
    font-size: 14px;
    font-weight: 700;
    border-radius: 9px;
    border: 1px solid transparent;
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
  }
  .btn-buy:hover {
    background: #FFC251;
    transform: translateY(-1px);
    box-shadow: 0 10px 16px -12px rgba(240,169,46,.85);
  }
  .btn-buy:active { transform: translateY(0); }

  /* 使用场景板块 */
  .scene-section {
    background: var(--soft);
    border-block: 1px solid rgba(220,230,237,.7);
  }
  .scene-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
    margin-top: 34px;
  }
  .scene-card {
    background: var(--surface);
    border: 1px solid rgba(220,230,237,.86);
    border-radius: var(--radius-card);
    padding: 30px 26px;
    border-top: 3px solid var(--accent-teal);
    box-shadow: var(--shadow-card);
    transition: transform .2s ease, box-shadow .2s ease;
  }
  .scene-card:nth-child(2) { border-top-color: var(--primary); }
  .scene-card:nth-child(3) { border-top-color: var(--warm-cta); }
  .scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
  .scene-step {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(36,198,176,.14);
    color: #117D6D;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 18px;
  }
  .scene-card:nth-child(2) .scene-step { background: rgba(30,107,184,.14); color: var(--primary-dark); }
  .scene-card:nth-child(3) .scene-step { background: rgba(240,169,46,.16); color: #9A6200; }
  .scene-card h3 {
    margin: 0 0 10px;
    color: #12283C;
    font-size: 1.12rem;
    line-height: 1.4;
  }
  .scene-card p { margin: 0 0 14px; color: var(--muted); font-size: .92rem; line-height: 1.8; }
  .scene-card .scene-note {
    margin: 0;
    color: #40556A;
    background: #F3F7FA;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: .84rem;
  }
  .scene-card .scene-note b { color: var(--primary-dark); }

  /* 保障条 */
  .assurance-strip { padding: 52px 0; background: #F0F5F8; border-bottom: 1px solid var(--line); }
  .assurance-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 26px;
  }
  .assurance-item { display: flex; gap: 13px; align-items: flex-start; }
  .assurance-dot {
    display: inline-flex;
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(30,107,184,.12);
    color: var(--primary-dark);
    font-weight: 800;
    font-size: 13px;
    margin-top: 2px;
  }
  .assurance-item strong {
    display: block;
    margin-bottom: 4px;
    color: #16283B;
    font-weight: 700;
    font-size: 15px;
  }
  .assurance-item span {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
  }

  /* FAQ */
  .faq-section { background: var(--bg); }
  .faq-list {
    max-width: 920px;
    margin: 38px auto 0;
    display: grid;
    gap: 16px;
  }
  .faq-item {
    background: var(--surface);
    border: 1px solid rgba(220,230,237,.9);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: 0 7px 18px -20px rgba(20,36,48,.4);
  }
  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    text-align: left;
    padding: 19px 22px;
    background: transparent;
    border: 0;
    color: var(--ink);
    font-weight: 700;
    font-size: 15px;
    line-height: 1.5;
    cursor: pointer;
    transition: color .2s ease;
  }
  .faq-question:hover { color: var(--primary-dark); }
  .faq-icon {
    position: relative;
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--soft);
    transition: background .2s ease, transform .2s ease;
  }
  .faq-icon::before,
  .faq-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 12px;
    height: 2px;
    background: var(--primary-dark);
    border-radius: 2px;
    transform: translate(-50%, -50%);
    transition: opacity .2s ease, transform .2s ease;
  }
  .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .faq-answer-inner {
    padding: 0 22px 22px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.85;
  }
  .faq-item.is-open .faq-icon { background: rgba(30,107,184,.14); transform: rotate(180deg); }
  .faq-item.is-open .faq-icon::after { opacity: 0; }
  .faq-item.is-open .faq-question { color: var(--primary-dark); }

  /* CTA 尾部行动块 */
  .cta-section { padding: 20px 0 88px; }
  .cta-panel {
    background: var(--warm-cta);
    border-radius: 28px;
    overflow: hidden;
    padding: 54px 62px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 44px;
    box-shadow: 0 26px 48px -30px rgba(176, 97, 0, .8);
  }
  .cta-panel h2 {
    margin: 0 0 14px;
    color: var(--cta-fg);
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    line-height: 1.3;
    font-weight: 800;
  }
  .cta-panel p {
    margin: 0;
    color: rgba(16,28,40,.78);
    font-size: 15px;
    max-width: 660px;
  }
  .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
  .btn-dark {
    background: var(--cta-fg);
    color: #fff;
  }
  .btn-dark:hover { background: #223448; transform: translateY(-2px); }
  .btn-outline-dark {
    border-color: rgba(16,28,40,.34);
    color: var(--cta-fg);
    background: transparent;
  }
  .btn-outline-dark:hover { background: rgba(16,28,40,.08); transform: translateY(-2px); }

  /* 页脚 */
  .site-footer {
    background: var(--nav-bg);
    color: rgba(255,255,255,.72);
    position: relative;
  }
  .site-footer .top-neon { margin-top: -2px; }
  .footer-top { padding: 62px 0 46px; }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr .9fr .9fr 1.1fr;
    gap: 38px;
  }
  .footer-brand .brand {
    display: inline-flex;
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
  }
  .footer-brand p {
    margin: 14px 0 0;
    max-width: 340px;
    font-size: 14px;
    line-height: 1.85;
    color: rgba(255,255,255,.62);
  }
  .footer-col h3 {
    margin: 0 0 16px;
    color: #fff;
    font-size: 15px;
    font-weight: 800;
    letter-spacing: .02em;
  }
  .footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px;
  }
  .footer-col ul li {
    color: rgba(255,255,255,.66);
    font-size: 14px;
    line-height: 1.6;
  }
  .footer-col ul a,
  .footer-contact-list a {
    color: rgba(255,255,255,.72);
    transition: color .2s ease;
  }
  .footer-col ul a:hover,
  .footer-contact-list a:hover { color: var(--neon); }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 22px 0;
    font-size: 13px;
    color: rgba(255,255,255,.5);
  }
  .footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }
  .back-top {
    color: rgba(255,255,255,.65);
    font-weight: 600;
    transition: color .2s ease;
  }
  .back-top:hover { color: var(--neon); }

  /* 响应式断点 */
  @media (max-width: 1100px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .scene-grid { grid-template-columns: repeat(2, 1fr); }
    .assurance-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 960px) {
    .desktop-nav,
    .header-cta-desktop { display: none; }
    .nav-toggle { display: inline-flex; }
    .navbar-inner { justify-content: space-between; }
    .nav-links { margin-left: 0; }
    .category-hero-inner { grid-template-columns: 1fr; gap: 36px; }
    .hero-media img { max-width: 640px; margin-inline: auto; }
    .hero-lead { max-width: 680px; }
    .category-hero { padding: 64px 0 64px; }
    .cta-panel { grid-template-columns: 1fr; padding: 44px 32px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .section-block { padding-block: 64px; }
  }
  @media (max-width: 640px) {
    .container-site { width: min(100% - 36px, 1240px); }
    .brand { font-size: 1.45rem; }
    .product-grid,
    .scene-grid,
    .assurance-grid { grid-template-columns: 1fr; }
    .hero-action-row { flex-direction: column; align-items: stretch; }
    .hero-action-row .btn { width: 100%; }
    .filter-toolbar { align-items: flex-start; flex-direction: column; }
    .sort-note::before { display: none; }
    .section-head h2 { font-size: 1.7rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
    .category-cta { padding: 16px 0 64px; }
    .cta-panel { padding: 36px 22px; }
    .cta-actions .btn { width: 100%; }
  }