/* roulang page: index */
:root {
      --ink: #182a28;
      --ink-soft: #425451;
      --muted: #75827d;
      --paper: #f7f8f3;
      --white: #fff;
      --line: #dce3dc;
      --green: #276453;
      --green-dark: #1e4d41;
      --lime: #d8ee86;
      --coral: #d96b50;
      --coral-soft: #fff0ea;
      --mist: #eaf1e9;
      --sky: #e5f1f3;
      --radius: 10px;
      --shadow: 0 8px 24px rgba(24, 42, 40, .07);
      --container: 1180px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 92px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
      font-size: 15px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    a:hover { color: var(--green); }
    img { display: block; max-width: 100%; }
    button, input, select { font: inherit; }
    :focus-visible { outline: 3px solid rgba(39, 100, 83, .45); outline-offset: 3px; }
    .site-container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
    .topline { height: 5px; background: linear-gradient(90deg, var(--green) 0 58%, var(--lime) 58% 78%, var(--coral) 78%); }
    .site-header {
      position: sticky; z-index: 1000; top: 0;
      background: rgba(247, 248, 243, .96);
      border-bottom: 1px solid rgba(220, 227, 220, .9);
      backdrop-filter: blur(12px);
    }
    .navbar { min-height: 74px; padding: 10px 0; }
    .brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-weight: 800; }
    .brand-mark {
      width: 42px; height: 42px; display: grid; place-items: center;
      border-radius: 9px; background: var(--green); color: var(--lime);
      font-size: 18px; font-weight: 900;
    }
    .brand-name { max-width: 210px; font-size: 16px; line-height: 1.3; }
    .navbar-nav { gap: 4px; align-items: center; }
    .nav-link {
      padding: 9px 12px !important; border-radius: 7px; color: var(--ink-soft);
      font-size: 13px; font-weight: 650; transition: color .18s, background .18s;
    }
    .nav-link:hover, .nav-link.active { color: var(--green-dark); background: var(--mist); }
    .navbar-toggler { border: 1px solid var(--line); padding: 8px 10px; }
    .navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(39, 100, 83, .17); }
    .hero {
      position: relative; overflow: hidden; color: #fff;
      background: var(--ink); padding: 53px 0 42px;
    }
    .hero::after {
      content: ""; position: absolute; width: 38%; height: 100%; right: 0; top: 0;
      background: #213c36; clip-path: polygon(28% 0,100% 0,100% 100%,0 100%);
      opacity: .8;
    }
    .hero-content { position: relative; z-index: 1; }
    .hero-kicker { display: inline-flex; gap: 9px; align-items: center; color: var(--lime); font-size: 12px; font-weight: 750; }
    .hero-kicker::before { content: ""; width: 23px; height: 2px; background: var(--lime); }
    .hero h1 { max-width: 760px; margin: 15px 0 8px; font-size: clamp(32px, 5vw, 54px); line-height: 1.2; font-weight: 850; }
    .hero h1 span { color: var(--lime); }
    .hero-subtitle { margin: 0; color: #e2ebe5; font-size: 17px; }
    .hero-copy { max-width: 730px; margin: 16px 0 22px; color: #c2d0c8; font-size: 14px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
    .btn { border-radius: 7px; padding: 10px 17px; font-weight: 750; font-size: 14px; transition: transform .18s, background .18s, border-color .18s; }
    .btn:hover { transform: translateY(-2px); }
    .btn-primary-custom { color: var(--ink); background: var(--lime); border: 1px solid var(--lime); }
    .btn-primary-custom:hover { color: var(--ink); background: #e5f6a7; border-color: #e5f6a7; }
    .btn-outline-light-custom { color: #fff; border: 1px solid #84958d; background: transparent; }
    .btn-outline-light-custom:hover { color: var(--ink); background: #fff; border-color: #fff; }
    .hero-note { margin-top: 25px; display: flex; gap: 22px; flex-wrap: wrap; color: #afc0b7; font-size: 12px; }
    .hero-note strong { color: #fff; font-weight: 700; }
    .coupon-strip { position: relative; z-index: 2; margin-top: 35px; }
    .coupon {
      display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px;
      max-width: 760px; padding: 17px 20px; color: var(--ink);
      background: var(--lime); border-radius: 8px; border-left: 6px solid var(--coral);
    }
    .coupon-label { color: var(--green-dark); font-size: 11px; font-weight: 850; letter-spacing: .04em; }
    .coupon h2 { margin: 3px 0 0; font-size: 18px; font-weight: 850; }
    .coupon p { margin: 3px 0 0; color: #4f6255; font-size: 12px; }
    .coupon .btn { color: #fff; background: var(--green); border-color: var(--green); white-space: nowrap; }
    .coupon .btn:hover { background: var(--green-dark); }
    main { overflow: clip; }
    .section { padding: 64px 0; border-bottom: 1px solid var(--line); }
    .section-tint { background: #eef3ec; }
    .section-white { background: var(--white); }
    .section-dark { color: #fff; background: var(--ink); border-color: #324440; }
    .section-head { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 25px; }
    .eyebrow { margin: 0 0 5px; color: var(--green); font-size: 11px; font-weight: 850; letter-spacing: .04em; }
    .section-dark .eyebrow { color: var(--lime); }
    .section-title { margin: 0; font-size: 27px; line-height: 1.3; font-weight: 850; }
    .section-desc { max-width: 670px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
    .section-dark .section-desc { color: #b9c9c0; }
    .text-link { color: var(--green); font-size: 13px; font-weight: 800; white-space: nowrap; }
    .text-link:hover { color: var(--coral); }
    .search-row {
      display: grid; grid-template-columns: minmax(220px, 1.5fr) repeat(2, minmax(140px, .7fr)) auto auto;
      gap: 10px; align-items: end;
    }
    .form-label { margin-bottom: 6px; color: var(--ink-soft); font-size: 12px; font-weight: 750; }
    .form-control, .form-select {
      min-height: 46px; border: 1px solid var(--line); border-radius: 7px;
      color: var(--ink); background-color: #fff; font-size: 14px;
    }
    .form-control:focus, .form-select:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(39,100,83,.12); }
    .search-submit { min-height: 46px; color: #fff; background: var(--green); border: 1px solid var(--green); }
    .search-submit:hover { color: #fff; background: var(--green-dark); }
    .clear-link { min-height: 46px; display: inline-flex; align-items: center; padding: 0 8px; color: var(--muted); font-size: 13px; }
    .pain-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 34px; align-items: center; }
    .pain-list { padding: 0; margin: 0; list-style: none; }
    .pain-list li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); }
    .pain-num { color: var(--coral); font-weight: 850; font-size: 13px; }
    .pain-list strong { display: block; font-size: 14px; }
    .pain-list span:last-child { color: var(--muted); font-size: 13px; }
    .quote-panel { padding: 25px; border-left: 4px solid var(--coral); background: var(--coral-soft); }
    .quote-panel p { margin: 0 0 10px; font-size: 18px; line-height: 1.65; font-weight: 700; }
    .quote-panel small { color: var(--muted); }
    .solution-band { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .solution-item { padding: 21px 23px; border-right: 1px solid var(--line); }
    .solution-item:last-child { border-right: 0; }
    .solution-icon { color: var(--coral); font-size: 12px; font-weight: 850; }
    .solution-item h3 { margin: 7px 0 4px; font-size: 16px; font-weight: 800; }
    .solution-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .step { position: relative; padding: 0 20px 0 0; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 18px; left: 42px; right: 9px; height: 1px; background: #b7c5bb; }
    .step-num { position: relative; z-index: 1; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: #fff; background: var(--green); font-size: 13px; font-weight: 850; }
    .step h3 { margin: 13px 0 5px; font-size: 15px; font-weight: 800; }
    .step p { margin: 0; max-width: 220px; color: var(--muted); font-size: 13px; }
    .stats-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #3b5149; }
    .stat { padding: 23px 20px 4px 0; }
    .stat strong { display: block; color: var(--lime); font-size: 30px; line-height: 1.2; font-weight: 850; }
    .stat span { color: #becbc4; font-size: 12px; }
    .editor-note { margin: 18px 0 0; color: #9fb0a7; font-size: 11px; }
    .poster-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 20px 14px; }
    .poster-card { min-width: 0; }
    .poster-image { position: relative; aspect-ratio: 3 / 4; overflow: hidden; border-radius: 8px; background: #dce6dd; }
    .poster-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
    .poster-card:hover .poster-image img { transform: scale(1.04); }
    .badge-state {
      position: absolute; left: 8px; top: 8px; padding: 3px 7px; border-radius: 4px;
      color: #fff; background: var(--green); font-size: 10px; font-weight: 850;
    }
    .badge-state.blue { background: #34747a; }
    .badge-state.coral { background: var(--coral); }
    .poster-card h3 { margin: 9px 0 2px; font-size: 13px; line-height: 1.5; font-weight: 800; }
    .poster-meta { display: flex; align-items: center; justify-content: space-between; gap: 6px; color: var(--muted); font-size: 11px; }
    .rating { color: #895e24; font-weight: 850; }
    .rating::before { content: "★ "; color: #d59635; }
    .data-story { display: grid; grid-template-columns: 1fr 1.25fr; gap: 44px; align-items: center; }
    .data-story h2 { margin: 0; font-size: 28px; line-height: 1.35; font-weight: 850; }
    .data-story p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
    .metric-list { display: grid; grid-template-columns: repeat(3, 1fr); border-left: 1px solid var(--line); }
    .metric { padding: 10px 18px; border-right: 1px solid var(--line); }
    .metric b { display: block; font-size: 24px; line-height: 1.3; color: var(--green); }
    .metric span { color: var(--muted); font-size: 12px; }
    .featured-grid { display: grid; grid-template-columns: 1.25fr .9fr .9fr; grid-template-rows: repeat(2, minmax(130px, 1fr)); gap: 12px; }
    .feature-item { position: relative; overflow: hidden; min-height: 145px; border-radius: 8px; background: #d6e1d8; }
    .feature-item:first-child { grid-row: span 2; }
    .feature-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
    .feature-item:hover img { transform: scale(1.035); }
    .feature-item::after { content: ""; position: absolute; inset: 30% 0 0; background: linear-gradient(transparent, rgba(14,30,25,.82)); }
    .feature-caption { position: absolute; z-index: 1; left: 15px; right: 15px; bottom: 13px; color: #fff; }
    .feature-caption small { display: block; color: var(--lime); font-size: 10px; font-weight: 800; }
    .feature-caption strong { display: block; margin-top: 3px; font-size: 15px; line-height: 1.4; }
    .feature-item:first-child .feature-caption strong { font-size: 21px; }
    .channel-layout { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .channel { padding: 20px 22px 20px 0; margin-right: 22px; border-right: 1px solid var(--line); }
    .channel:last-child { border: 0; margin: 0; }
    .channel-tag { color: var(--coral); font-size: 11px; font-weight: 850; }
    .channel h3 { margin: 5px 0 7px; font-size: 17px; font-weight: 850; }
    .channel p { min-height: 50px; margin: 0 0 10px; color: var(--muted); font-size: 13px; }
    .channel a { color: var(--green); font-size: 12px; font-weight: 850; }
    .ranking-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
    .rank-list { padding: 0; margin: 0; list-style: none; }
    .rank-item { display: grid; grid-template-columns: 36px 1fr auto auto; gap: 12px; align-items: center; min-height: 57px; border-bottom: 1px solid var(--line); }
    .rank-index { color: #88948e; font-size: 15px; font-weight: 850; }
    .rank-item:nth-child(-n+3) .rank-index { color: var(--coral); }
    .rank-name { font-size: 13px; font-weight: 800; }
    .rank-category { display: inline-block; padding: 2px 6px; border-radius: 4px; color: var(--green); background: var(--mist); font-size: 10px; }
    .rank-heat { color: var(--muted); font-size: 11px; white-space: nowrap; }
    .rank-score { color: #895e24; font-size: 12px; font-weight: 850; white-space: nowrap; }
    .topic-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .topic {
      display: grid; grid-template-columns: 145px 1fr; min-height: 132px; overflow: hidden;
      border: 1px solid var(--line); border-radius: 8px; background: #fff;
    }
    .topic img { width: 100%; height: 100%; object-fit: cover; }
    .topic-content { padding: 14px 16px; }
    .topic-content small { color: var(--coral); font-size: 10px; font-weight: 850; }
    .topic-content h3 { margin: 4px 0; font-size: 15px; font-weight: 850; }
    .topic-content p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
    .news-list { display: grid; grid-template-columns: 1fr 1fr; column-gap: 30px; }
    .news-item { display: grid; grid-template-columns: 95px 1fr; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
    .news-item img { width: 95px; height: 68px; border-radius: 6px; object-fit: cover; }
    .news-item time { color: var(--coral); font-size: 10px; font-weight: 750; }
    .news-item h3 { margin: 3px 0 0; font-size: 13px; line-height: 1.55; font-weight: 800; }
    .guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 36px; }
    .guide-entry { display: grid; grid-template-columns: 118px 1fr; gap: 15px; padding: 17px 0; border-bottom: 1px solid #3b5149; }
    .guide-entry strong { color: var(--lime); font-size: 13px; }
    .guide-entry p { margin: 0; color: #bdc9c2; font-size: 13px; }
    .quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .quote-card { padding: 16px 0 0; border-top: 2px solid var(--coral); }
    .quote-card blockquote { margin: 0 0 11px; color: var(--ink-soft); font-size: 15px; font-weight: 650; }
    .quote-card small { color: var(--muted); font-size: 11px; }
    .audience-row { display: flex; gap: 9px; flex-wrap: wrap; }
    .audience-pill { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); background: #fff; font-size: 12px; font-weight: 700; }
    .audience-copy { max-width: 790px; margin-top: 17px; color: var(--muted); font-size: 13px; }
    .indicator-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .indicator { padding: 17px 18px 17px 0; margin-right: 18px; border-right: 1px solid var(--line); }
    .indicator:last-child { border: 0; margin: 0; }
    .indicator b { display: block; color: var(--green); font-size: 16px; }
    .indicator span { color: var(--muted); font-size: 12px; }
    .accordion { --bs-accordion-bg: transparent; --bs-accordion-border-color: var(--line); --bs-accordion-btn-color: var(--ink); --bs-accordion-active-color: var(--green-dark); --bs-accordion-active-bg: #eef3ec; --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(39,100,83,.12); }
    .accordion-item { border-radius: 7px !important; overflow: hidden; margin-bottom: 9px; border: 1px solid var(--line); }
    .accordion-button { padding: 16px 18px; font-size: 14px; font-weight: 800; }
    .accordion-button:not(.collapsed) { box-shadow: none; }
    .accordion-body { padding: 0 18px 17px; color: var(--muted); font-size: 13px; }
    .closing { padding: 45px 0; color: #fff; background: var(--green); }
    .closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
    .closing h2 { margin: 0 0 5px; font-size: 25px; font-weight: 850; }
    .closing p { margin: 0; color: #d0e0d8; font-size: 13px; }
    .closing .btn-primary-custom { flex-shrink: 0; }
    .site-footer { padding: 42px 0 20px; color: #dce6df; background: #142320; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.1fr; gap: 35px; }
    .footer-brand .brand { color: #fff; }
    .footer-brand p { max-width: 300px; margin: 14px 0 0; color: #aebdb5; font-size: 12px; }
    .footer-col h2 { margin: 4px 0 12px; color: #fff; font-size: 13px; font-weight: 850; }
    .footer-col a, .footer-col p { display: block; margin: 6px 0; color: #aebdb5; font-size: 12px; }
    .footer-col a:hover { color: var(--lime); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 15px; margin-top: 31px; padding-top: 15px; border-top: 1px solid #34443e; color: #879890; font-size: 11px; }
    .age-note { color: #aebdb5; }
    @media (max-width: 991.98px) {
      .site-container { width: min(100% - 36px, var(--container)); }
      .navbar-collapse { padding: 12px 0 5px; }
      .navbar-nav { align-items: stretch; }
      .nav-link { padding: 9px 10px !important; }
      .search-row { grid-template-columns: 1fr 1fr; }
      .search-main { grid-column: span 2; }
      .search-submit, .clear-link { grid-column: auto; }
      .poster-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
      .featured-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 230px 150px 150px; }
      .feature-item:first-child { grid-column: span 2; grid-row: auto; }
      .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
      .footer-brand { grid-column: span 3; }
    }
    @media (max-width: 767.98px) {
      .section { padding: 48px 0; }
      .hero { padding-top: 42px; }
      .hero::after { width: 65%; opacity: .42; }
      .hero h1 { max-width: 600px; }
      .section-head { align-items: start; flex-direction: column; gap: 8px; }
      .section-title { font-size: 23px; }
      .pain-grid, .data-story { grid-template-columns: 1fr; gap: 22px; }
      .solution-band { grid-template-columns: 1fr; }
      .solution-item { padding: 15px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .solution-item:last-child { border-bottom: 0; }
      .steps { grid-template-columns: repeat(2, 1fr); row-gap: 25px; }
      .step:nth-child(2)::after { display: none; }
      .stats-row { grid-template-columns: repeat(2, 1fr); }
      .stat { padding-bottom: 18px; }
      .poster-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 12px; }
      .metric-list { border-left: 0; }
      .metric:first-child { padding-left: 0; }
      .channel-layout { grid-template-columns: 1fr 1fr; }
      .channel { margin: 0; padding: 17px 14px 17px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .channel:nth-child(odd) { margin-right: 14px; border-right: 1px solid var(--line); }
      .channel:last-child { grid-column: span 2; border-bottom: 0; }
      .ranking-layout { grid-template-columns: 1fr; gap: 0; }
      .topic-row, .news-list { grid-template-columns: 1fr; }
      .guide-grid { grid-template-columns: 1fr; }
      .quote-grid { grid-template-columns: 1fr; gap: 20px; }
      .indicator-grid { grid-template-columns: repeat(2, 1fr); }
      .indicator:nth-child(2) { border-right: 0; }
      .indicator:nth-child(3) { border-top: 1px solid var(--line); }
      .indicator:nth-child(4) { border-top: 1px solid var(--line); }
      .closing-inner { align-items: start; flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 25px; }
      .footer-brand { grid-column: span 2; }
    }
    @media (max-width: 519.98px) {
      .site-container { width: calc(100% - 30px); }
      .brand-name { max-width: 190px; font-size: 14px; }
      .brand-mark { width: 38px; height: 38px; }
      .hero { padding: 34px 0 31px; }
      .hero h1 { font-size: 34px; }
      .hero-subtitle { font-size: 15px; }
      .hero-copy { font-size: 13px; }
      .hero-note { gap: 11px 16px; }
      .coupon { grid-template-columns: 1fr; gap: 12px; padding: 15px; }
      .coupon .btn { width: fit-content; }
      .search-row { grid-template-columns: 1fr 1fr; gap: 8px; }
      .search-main { grid-column: span 2; }
      .search-submit { grid-column: span 2; }
      .clear-link { grid-column: span 2; min-height: 28px; justify-content: center; }
      .section-title { font-size: 21px; }
      .steps { column-gap: 12px; }
      .step { padding-right: 5px; }
      .step:not(:last-child)::after { right: 3px; }
      .poster-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 12px; }
      .featured-grid { grid-template-rows: 210px 135px 135px; gap: 8px; }
      .feature-item:first-child .feature-caption strong { font-size: 18px; }
      .metric-list { grid-template-columns: repeat(3, 1fr); }
      .metric { padding: 7px 8px; }
      .metric b { font-size: 20px; }
      .channel-layout { grid-template-columns: 1fr; }
      .channel, .channel:nth-child(odd) { margin: 0; padding: 15px 0; border-right: 0; border-bottom: 1px solid var(--line); }
      .channel:last-child { grid-column: auto; border: 0; }
      .rank-item { grid-template-columns: 26px 1fr auto; gap: 8px; }
      .rank-heat { display: none; }
      .topic { grid-template-columns: 105px 1fr; min-height: 125px; }
      .topic-content { padding: 10px 11px; }
      .news-item { grid-template-columns: 82px 1fr; gap: 11px; }
      .news-item img { width: 82px; height: 63px; }
      .guide-entry { grid-template-columns: 94px 1fr; gap: 10px; }
      .indicator { padding-right: 9px; margin-right: 9px; }
      .footer-grid { gap: 20px 12px; }
      .footer-bottom { flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
    }