/* roulang page: index */
:root {
    --bg: #F7F6F2;
    --bg-alt: #EFEDE6;
    --surface: #FFFFFF;
    --ink: #141A18;
    --ink-soft: #5F6B67;
    --line: #DEDCD3;
    --brand: #0E3B36;
    --brand-2: #2F6B60;
    --accent: #D9642A;
    --accent-soft: #F3E2D6;
    --font-sans: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
    --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, monospace;
    --r-btn: 2px;
    --r-card: 6px;
    --r-figure: 12px;
  }

  * { box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.9;
    -webkit-font-smoothing: antialiased;
  }

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

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

  h1, h2, h3, h4 { margin: 0; line-height: 1.22; letter-spacing: -0.02em; font-weight: 700; }

  p { margin: 0; }

  button, input { font-family: inherit; font-size: inherit; }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  @media (min-width: 768px) { .container { padding: 0 32px; } }
  @media (min-width: 1024px) { .container { padding: 0 40px; } }

  .section { padding: 64px 0; }
  @media (min-width: 1024px) { .section { padding: 104px 0; } }

  .eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .14em;
    color: var(--brand-2);
    text-transform: uppercase;
  }

  .section-title { font-size: clamp(24px, 3.2vw, 36px); }
  .lead { font-size: 19px; line-height: 1.75; color: var(--ink-soft); }

  /* ---------- Header ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(247, 246, 242, .94);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }

  .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 72px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.01em;
    white-space: nowrap;
  }

  .logo .logo-en { color: var(--brand); }
  .logo .logo-dot {
    width: 6px; height: 6px; background: var(--accent);
    display: inline-block; border-radius: 1px;
  }
  .logo .logo-cn { color: var(--ink); }

  .nav-links { display: none; }

  @media (min-width: 1024px) {
    .nav-links {
      display: flex;
      align-items: center;
      gap: 30px;
      font-size: 15px;
      color: var(--ink-soft);
    }
    .nav-links a {
      position: relative;
      padding: 6px 0;
      transition: color .2s ease;
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0; bottom: 0;
      height: 2px; width: 0;
      background: var(--brand);
      transition: width .22s cubic-bezier(.2,.7,.2,1);
    }
    .nav-links a:hover { color: var(--brand); }
    .nav-links a:hover::after { width: 100%; }
    .nav-links a.active { color: var(--brand); font-weight: 600; }
    .nav-links a.active::after { width: 100%; }
  }

  .nav-right { display: flex; align-items: center; gap: 14px; }

  .nav-search {
    display: none;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--r-btn);
    padding: 7px 12px;
    color: var(--ink-soft);
    font-size: 13px;
  }
  @media (min-width: 1024px) { .nav-search { display: flex; } }
  .nav-search input { border: 0; outline: 0; background: transparent; width: 110px; }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: var(--r-btn);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s ease;
    white-space: nowrap;
  }

  .btn-primary { background: var(--brand); color: #fff; }
  .btn-primary:hover { background: var(--accent); transform: translateY(-1px); }

  .btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
  .btn-ghost:hover { background: var(--brand); color: #fff; border-color: var(--brand); }

  .btn-outline { background: transparent; color: var(--brand); border-color: var(--line); }
  .btn-outline:hover { border-color: var(--brand-2); color: var(--brand-2); transform: translateY(-1px); }

  .link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    color: var(--brand);
    font-size: 15px;
  }
  .link-arrow i { transition: transform .2s ease; }
  .link-arrow:hover i { transform: translateX(4px); }

  a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  .hamburger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px; height: 42px;
    border: 1px solid var(--line);
    border-radius: var(--r-btn);
    background: var(--surface);
    color: var(--brand);
    cursor: pointer;
  }
  @media (min-width: 1024px) { .hamburger { display: none; } }

  /* ---------- Mobile drawer ---------- */
  .drawer {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(88vw, 380px);
    background: var(--bg);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform .32s cubic-bezier(.2,.7,.2,1);
    z-index: 90;
    display: flex;
    flex-direction: column;
    padding: 22px 22px 26px;
  }
  .drawer.open { transform: translateX(0); }
  .drawer-backdrop {
    position: fixed; inset: 0;
    background: rgba(20,26,24,.42);
    opacity: 0; pointer-events: none;
    transition: opacity .3s ease;
    z-index: 80;
  }
  .drawer-backdrop.open { opacity: 1; pointer-events: auto; }
  .drawer nav { display: flex; flex-direction: column; margin-top: 18px; flex: 1; }
  .drawer nav a {
    font-size: 20px;
    line-height: 56px;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
  }
  .drawer nav a.active { color: var(--brand); font-weight: 700; }

  /* ---------- Hero ---------- */
  .hero { padding: 48px 0 56px; }
  @media (min-width: 1024px) { .hero { padding: 76px 0 96px; } }

  .hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    align-items: center;
  }
  @media (min-width: 1024px) {
    .hero-grid { grid-template-columns: 7fr 5fr; gap: 56px; }
  }

  .hero h1 {
    font-size: clamp(32px, 5vw, 54px);
    margin: 18px 0 16px;
  }
  .hero h1 .kw { white-space: nowrap; color: var(--brand); }

  .hero-sub {
    font-size: 17px;
    color: var(--ink-soft);
    max-width: 30em;
    margin-bottom: 28px;
  }

  .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

  .hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 40px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
  }
  .metric-num {
    font-family: var(--font-mono);
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--brand);
    line-height: 1.1;
  }
  .metric-label { font-size: 13px; color: var(--ink-soft); margin-top: 6px; }

  .hero-figure {
    position: relative;
    border-radius: var(--r-figure);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: var(--brand);
  }
  @media (min-width: 1024px) { .hero-figure { aspect-ratio: 4 / 5; } }
  .hero-figure img {
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: .72;
    transition: transform .8s cubic-bezier(.2,.7,.2,1);
  }
  .hero-figure:hover img { transform: scale(1.03); }
  .hero-figure::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(14,59,54,.35), rgba(14,59,54,.78));
  }
  .hero-float {
    position: absolute;
    right: 16px; bottom: 16px;
    z-index: 2;
    background: rgba(247,246,242,.96);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 14px 16px;
    max-width: 220px;
  }
  .hero-float .hf-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--brand-2);
  }
  .hero-float .hf-text { font-size: 14px; color: var(--ink); margin-top: 6px; line-height: 1.6; }

  /* ---------- 品牌主张条 ---------- */
  .pillars {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--bg);
  }
  .pillars-grid {
    display: grid;
    grid-template-columns: 1fr;
  }
  @media (min-width: 640px) { .pillars-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .pillars-grid { grid-template-columns: repeat(4, 1fr); } }

  .pillar { padding: 30px 0; }
  @media (min-width: 640px) { .pillar { padding: 36px 28px; } .pillar:first-child { padding-left: 0; } }
  @media (min-width: 1024px) {
    .pillar + .pillar { border-left: 1px solid var(--line); }
  }
  .pillar .p-idx {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent);
    letter-spacing: .14em;
  }
  .pillar h3 { font-size: 17px; margin: 12px 0 10px; }
  .pillar p { font-size: 14px; color: var(--ink-soft); line-height: 1.8; }

  /* ---------- 图文错位 ---------- */
  .story-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: center;
  }
  @media (min-width: 1024px) {
    .story-row { grid-template-columns: 5fr 7fr; gap: 60px; }
    .story-row.reverse .story-figure { order: 2; }
    .story-row.reverse .story-body { order: 1; }
  }
  .story-figure {
    position: relative;
    border-radius: var(--r-figure);
    overflow: hidden;
    aspect-ratio: 4 / 3;
  }
  .story-figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
  .story-figure:hover img { transform: scale(1.03); }
  .story-figure::before {
    content: "";
    position: absolute;
    left: 0; top: 18%;
    width: 3px; height: 34%;
    background: var(--accent);
    z-index: 2;
  }
  .story-body h2 { font-size: clamp(24px, 3.2vw, 36px); margin-bottom: 18px; }
  .story-body p { color: var(--ink-soft); margin-bottom: 16px; }
  .story-list { list-style: none; padding: 0; margin: 20px 0 24px; }
  .story-list li {
    position: relative;
    padding-left: 20px;
    font-size: 15px;
    color: var(--ink);
    margin-bottom: 10px;
  }
  .story-list li::before {
    content: "";
    position: absolute;
    left: 0; top: 11px;
    width: 8px; height: 2px;
    background: var(--accent);
  }
  .stack-gap { display: grid; gap: 64px; }
  @media (min-width: 1024px) { .stack-gap { gap: 104px; } }

  /* ---------- 精选内容卡 ---------- */
  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  @media (min-width: 1024px) { .feature-grid { grid-template-columns: 7fr 5fr; grid-template-rows: auto auto; } }

  .fcard {
    display: block;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    overflow: hidden;
    transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  }
  .fcard:hover {
    border-color: var(--brand-2);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(14,59,54,.08);
  }
  .fcard figure { margin: 0; overflow: hidden; background: var(--bg-alt); }
  .fcard figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.2,1); }
  .fcard:hover figure img { transform: scale(1.03); }
  .fcard-large figure { aspect-ratio: 16 / 9; }
  .fcard-small figure { aspect-ratio: 4 / 5; }
  .fcard-body { padding: 22px; }
  .fcard-body h3 { font-size: 20px; position: relative; display: inline-block; }
  .fcard-body h3::after {
    content: "";
    position: absolute;
    left: 0; bottom: -6px;
    height: 2px; width: 0;
    background: var(--accent);
    transition: width .28s cubic-bezier(.2,.7,.2,1);
  }
  .fcard:hover .fcard-body h3::after { width: 100%; }
  .fcard-body p { margin-top: 16px; font-size: 14px; color: var(--ink-soft); line-height: 1.8; }
  .fcard-large .fcard-body { padding: 26px; }
  .fcard-large .fcard-body h3 { font-size: 24px; }

  .tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--brand);
    font-size: 13px;
    border-radius: var(--r-btn);
    padding: 4px 10px;
  }

  /* ---------- CMS 列表 ---------- */
  .list-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 12px;
  }
  .news-list { border-top: 1px solid var(--line); }
  .news-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px 12px 22px 8px;
    border-bottom: 1px solid var(--line);
    transition: background .22s ease, transform .22s ease;
  }
  .news-row:hover { background: var(--bg-alt); transform: translateX(4px); }
  @media (min-width: 768px) {
    .news-row { grid-template-columns: 88px 1fr 200px; align-items: center; gap: 26px; padding: 24px 14px; }
  }
  .news-date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ink-soft);
    letter-spacing: .06em;
  }
  .news-main h3 { font-size: 18px; }
  .news-main p {
    margin-top: 8px;
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .news-side {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }
  .news-side i { color: var(--brand-2); transition: transform .2s ease; }
  .news-row:hover .news-side i { transform: translateX(4px); }

  .empty-panel {
    border: 1px dashed var(--line);
    border-radius: var(--r-card);
    min-height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
    padding: 28px;
    background: var(--surface);
  }
  .empty-panel .ep-icon {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .14em;
    color: var(--brand-2);
  }
  .empty-panel p { color: var(--ink-soft); font-size: 15px; }

  /* ---------- 信任背书 ---------- */
  .trust-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
  }
  @media (min-width: 1024px) { .trust-grid { grid-template-columns: 7fr 5fr; gap: 60px; } }

  .trust-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }
  @media (min-width: 1024px) { .trust-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
  .tstat .n {
    font-family: var(--font-mono);
    font-size: clamp(34px, 4.4vw, 48px);
    font-weight: 700;
    color: var(--brand);
    line-height: 1;
  }
  .tstat .t { font-size: 14px; color: var(--ink-soft); margin-top: 10px; }

  .partner-box {
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    background: var(--surface);
    padding: 26px;
  }
  .partner-box h3 { font-size: 17px; margin-bottom: 18px; }
  .partner-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .partner-item {
    border: 1px solid var(--line);
    border-radius: var(--r-btn);
    padding: 14px 12px;
    font-size: 13px;
    color: var(--ink-soft);
    text-align: center;
    filter: grayscale(1);
    background: var(--bg);
  }

  /* ---------- FAQ ---------- */
  .faq-wrap { max-width: 860px; }
  .faq-item { border-top: 1px solid var(--line); }
  .faq-item:last-child { border-bottom: 1px solid var(--line); }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 4px;
    font-size: 17px;
    font-weight: 500;
    transition: color .2s ease;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary:hover { color: var(--brand); }
  .faq-item summary .plus {
    flex: none;
    width: 22px; height: 22px;
    position: relative;
    transition: transform .28s ease;
  }
  .faq-item summary .plus::before,
  .faq-item summary .plus::after {
    content: "";
    position: absolute;
    background: var(--brand-2);
    border-radius: 1px;
  }
  .faq-item summary .plus::before { left: 0; top: 10px; width: 22px; height: 2px; }
  .faq-item summary .plus::after { top: 0; left: 10px; width: 2px; height: 22px; }
  .faq-item[open] summary .plus { transform: rotate(45deg); }
  .faq-answer {
    max-width: 680px;
    padding: 0 4px 26px;
    color: var(--ink-soft);
    font-size: 15px;
    animation: fadeIn .3s ease;
  }
  @keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

  /* ---------- CTA ---------- */
  .cta-band {
    background: var(--brand);
    color: #fff;
  }
  .cta-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: center;
    padding: 44px 0;
  }
  @media (min-width: 1024px) {
    .cta-inner { grid-template-columns: 7fr 5fr; gap: 48px; padding: 52px 0; }
  }
  .cta-inner h2 { font-size: clamp(22px, 2.8vw, 30px); }
  .cta-inner p { margin-top: 12px; color: rgba(255,255,255,.76); font-size: 15px; }
  .cta-form { display: flex; gap: 10px; flex-wrap: wrap; }
  .cta-form input {
    flex: 1 1 220px;
    min-width: 0;
    padding: 13px 14px;
    border-radius: var(--r-btn);
    border: 1px solid rgba(255,255,255,.32);
    background: rgba(255,255,255,.08);
    color: #fff;
    outline: none;
    transition: border-color .2s ease, box-shadow .2s ease;
  }
  .cta-form input::placeholder { color: rgba(255,255,255,.56); }
  .cta-form input:focus { border-color: #fff; box-shadow: 0 0 0 3px rgba(217,100,42,.4); }
  .cta-form button {
    flex: none;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--r-btn);
    padding: 13px 24px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .2s ease, background .2s ease;
  }
  .cta-form button:hover { background: #c2571f; transform: translateY(-1px); }

  /* ---------- Footer ---------- */
  .site-footer { background: var(--brand); color: #fff; padding: 60px 0 28px; }
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 38px;
  }
  @media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .footer-grid { grid-template-columns: 4fr 2fr 2fr 3fr; gap: 44px; } }

  .footer-brand .logo { color: #fff; }
  .footer-brand .logo .logo-cn { color: #fff; }
  .footer-brand .logo .logo-en { color: #fff; }
  .footer-brand p { margin-top: 16px; color: rgba(255,255,255,.7); font-size: 14px; max-width: 30em; }
  .footer-social { display: flex; gap: 10px; margin-top: 20px; }
  .footer-social a {
    width: 36px; height: 36px;
    border: 1px solid rgba(255,255,255,.3);
    border-radius: var(--r-btn);
    display: inline-flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,.8);
    transition: all .2s ease;
  }
  .footer-social a:hover { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.6); }

  .footer-col h4 { font-size: 15px; margin-bottom: 16px; }
  .footer-col ul { list-style: none; padding: 0; margin: 0; }
  .footer-col li { margin-bottom: 11px; }
  .footer-col a {
    position: relative;
    color: rgba(255,255,255,.74);
    font-size: 14px;
    transition: color .2s ease;
  }
  .footer-col a::after {
    content: "";
    position: absolute;
    left: 0; bottom: -2px;
    width: 0; height: 1px;
    background: #fff;
    transition: width .22s ease;
  }
  .footer-col a:hover { color: #fff; }
  .footer-col a:hover::after { width: 100%; }

  .footer-sub input {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--r-btn);
    border: 1px solid rgba(255,255,255,.28);
    background: rgba(255,255,255,.07);
    color: #fff;
    outline: none;
    margin-bottom: 10px;
  }
  .footer-sub input::placeholder { color: rgba(255,255,255,.55); }
  .footer-sub input:focus { border-color: #fff; }
  .footer-sub button {
    width: 100%;
    padding: 12px 14px;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--r-btn);
    font-weight: 600;
    cursor: pointer;
    transition: background .2s ease;
  }
  .footer-sub button:hover { background: #c2571f; }

  .footer-bottom {
    margin-top: 48px;
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,.16);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    font-size: 13px;
    color: rgba(255,255,255,.6);
    font-family: var(--font-mono);
  }

  /* ---------- Reveal ---------- */
  .reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s cubic-bezier(.2,.7,.2,1), transform .6s cubic-bezier(.2,.7,.2,1); }
  .reveal.in { opacity: 1; transform: none; }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
  }

/* roulang page: category1 */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEDE6;
  --surface:#FFFFFF;
  --ink:#141A18;
  --ink-soft:#5F6B67;
  --line:#DEDCD3;
  --brand:#0E3B36;
  --brand-2:#2F6B60;
  --accent:#D9642A;
  --accent-soft:#F3E2D6;
  --radius-s:2px;
  --radius-m:6px;
  --radius-l:12px;
  --shadow:0 10px 24px rgba(14,59,54,.08);
  --shadow-lg:0 18px 40px rgba(14,59,54,.14);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,monospace;
  --nav-h:72px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.02em;font-weight:700}
p{margin:0}
::selection{background:var(--accent-soft);color:var(--brand)}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px}}
@media (min-width:1024px){.container{padding-left:40px;padding-right:40px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:var(--nav-h);
  display:flex;
  align-items:center;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:7px;
  white-space:nowrap;
  font-weight:700;
  line-height:1;
}
.logo-en{
  font-family:var(--font-mono);
  font-size:19px;
  letter-spacing:-.03em;
  color:var(--brand);
}
.logo-dot{
  width:6px;height:6px;
  background:var(--accent);
  border-radius:1px;
  display:inline-block;
}
.logo-cn{font-size:17px;color:var(--ink)}
.site-footer .logo-en,
.site-footer .logo-cn{color:#fff}
.site-footer .logo-dot{background:var(--accent)}

.nav-links{display:none}
@media (min-width:1024px){
  .nav-links{
    display:flex;
    align-items:center;
    gap:26px;
    margin:0 auto;
  }
}
.nav-links a{
  position:relative;
  padding:6px 0;
  font-size:15px;
  color:var(--ink-soft);
  transition:color .2s var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--brand);
  transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{width:100%}

.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.icon-btn{
  width:38px;height:38px;
  display:none;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-s);
  color:var(--ink-soft);
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
@media (min-width:1024px){.icon-btn{display:inline-flex}}
.icon-btn:hover{border-color:var(--brand-2);color:var(--brand)}
.menu-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-s);
  color:var(--ink);
  cursor:pointer;
}
@media (min-width:1024px){.menu-toggle{display:none}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-s);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--brand)}
.btn-light:hover{background:var(--accent);color:#fff;transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--brand);transform:translateY(-1px)}
.btn:focus-visible,
.icon-btn:focus-visible,
.menu-toggle:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
}
.link-arrow i{transition:transform .22s var(--ease)}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(20,26,24,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer.open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;
  top:0;right:0;
  width:min(88vw,380px);
  height:100%;
  background:var(--bg);
  border-left:1px solid var(--line);
  display:flex;
  flex-direction:column;
  transform:translateX(100%);
  transition:transform .3s var(--ease);
}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:20px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  background:transparent;
  border:0;
  font-size:24px;
  line-height:1;
  color:var(--ink-soft);
  cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;padding:8px 20px}
.drawer-nav a{
  padding:16px 0;
  font-size:18px;
  line-height:1.2;
  border-bottom:1px solid var(--line);
  color:var(--ink-soft);
}
.drawer-nav a.active{color:var(--brand);font-weight:700}
.drawer-cta{margin:auto 20px 28px}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--brand);
  color:#fff;
  padding:64px 0 72px;
}
.cat-hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.24;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,rgba(14,59,54,.95) 0%,rgba(14,59,54,.78) 52%,rgba(47,107,96,.55) 100%);
}
.cat-hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  gap:40px;
}
@media (min-width:1024px){
  .cat-hero{padding:88px 0 96px}
  .cat-hero-inner{grid-template-columns:7fr 5fr;align-items:center;gap:56px}
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
}
.cat-hero .eyebrow{color:#F0B693}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,50px);
  line-height:1.2;
  margin:16px 0 0;
  color:#fff;
}
.cat-hero .lead{
  margin-top:18px;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.8;
  color:rgba(255,255,255,.84);
  max-width:34em;
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:30px;
}
.hero-cta .btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.hero-cta .btn-ghost:hover{background:#fff;color:var(--brand);border-color:#fff}
.hero-facts{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  margin-top:38px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.22);
}
.hero-facts strong{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(20px,2.4vw,26px);
  color:#fff;
  letter-spacing:-.02em;
}
.hero-facts span{
  display:block;
  margin-top:4px;
  font-size:13px;
  color:rgba(255,255,255,.68);
  line-height:1.6;
}
.cat-hero-media{position:relative}
.cat-hero-media img{
  width:100%;
  aspect-ratio:4/5;
  object-fit:cover;
  border-radius:var(--radius-l);
  border:1px solid rgba(255,255,255,.22);
}
.float-card{
  position:absolute;
  right:-8px;
  bottom:-18px;
  background:var(--bg);
  color:var(--ink);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:14px 18px;
  box-shadow:var(--shadow-lg);
  max-width:230px;
}
.float-card b{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
}
.float-card span{
  display:block;
  margin-top:6px;
  font-size:13px;
  line-height:1.7;
  color:var(--ink-soft);
}

/* ---------- breadcrumb ---------- */
.crumb{
  padding:18px 0 0;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ink-soft);
}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li::after{content:"/";margin-left:8px;color:var(--line)}
.crumb li:last-child::after{content:"";margin:0}
.crumb a:hover{color:var(--brand)}
.crumb [aria-current]{color:var(--ink)}

/* ---------- sections ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--bg-alt)}
.section-ink{background:var(--brand);color:#fff}
.section-head{max-width:760px}
.section-head h2{
  font-size:clamp(24px,3.2vw,36px);
  margin-top:14px;
}
.section-head p{
  margin-top:16px;
  font-size:17px;
  color:var(--ink-soft);
  line-height:1.9;
}
.section-ink .section-head p{color:rgba(255,255,255,.78)}

/* ---------- numbered strip ---------- */
.strip{
  display:grid;
  gap:0;
  border-top:1px solid var(--line);
  margin-top:44px;
}
@media (min-width:768px){
  .strip{grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line)}
}
.strip-item{
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
@media (min-width:768px){
  .strip-item{
    border-bottom:0;
    border-left:1px solid var(--line);
    padding:8px 24px 8px 24px;
  }
  .strip-item:first-child{border-left:0;padding-left:0}
}
.strip-item b{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  color:var(--accent);
}
.strip-item h3{font-size:18px;margin-top:10px}
.strip-item p{
  margin-top:8px;
  font-size:15px;
  color:var(--ink-soft);
  line-height:1.85;
}

/* ---------- split rows ---------- */
.split{
  display:grid;
  gap:28px;
  align-items:center;
}
@media (min-width:900px){
  .split{grid-template-columns:5fr 7fr;gap:56px}
  .split.reverse{grid-template-columns:7fr 5fr}
}
.split + .split{margin-top:48px}
@media (min-width:1024px){.split + .split{margin-top:80px}}
.split-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
}
.split-body h3{font-size:clamp(20px,2.4vw,26px)}
.split-body p{
  margin-top:14px;
  color:var(--ink-soft);
  font-size:16px;
  line-height:1.9;
}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ink);
  line-height:1.8;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:8px;height:2px;
  background:var(--accent);
}

/* ---------- scenario cards ---------- */
.card-grid{
  display:grid;
  gap:20px;
  margin-top:44px;
  grid-template-columns:1fr;
}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}}
.scene-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:26px 24px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{
  border-color:var(--brand-2);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.scene-card .tag{
  display:inline-block;
  background:var(--accent-soft);
  color:var(--brand);
  font-size:13px;
  padding:4px 10px;
  border-radius:var(--radius-s);
  line-height:1.5;
}
.scene-card h3{font-size:18px;margin-top:14px}
.scene-card p{
  margin-top:10px;
  font-size:15px;
  color:var(--ink-soft);
  line-height:1.85;
}

/* ---------- steps ---------- */
.steps{margin-top:44px;border-top:1px solid var(--line)}
.step{
  display:grid;
  gap:8px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
@media (min-width:768px){
  .step{grid-template-columns:96px 1fr;gap:28px;padding:32px 0}
}
.step-num{
  font-family:var(--font-mono);
  font-size:30px;
  line-height:1;
  color:var(--accent);
  letter-spacing:-.03em;
}
.step h3{font-size:19px}
.step p{
  margin-top:8px;
  font-size:15.5px;
  color:var(--ink-soft);
  line-height:1.9;
}
.note{
  margin-top:32px;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--accent);
  border-radius:var(--radius-m);
  padding:20px 22px;
  font-size:15px;
  color:var(--ink-soft);
  line-height:1.9;
}
.note b{color:var(--ink)}

/* ---------- faq ---------- */
.faq{margin-top:40px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  font-size:17.5px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:22px;
  line-height:1;
  color:var(--brand-2);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--accent)}
.faq .answer{
  max-width:680px;
  padding:0 0 24px;
  font-size:15.5px;
  color:var(--ink-soft);
  line-height:1.95;
  animation:fadeUp .35s var(--ease);
}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- related ---------- */
.related{
  display:grid;
  gap:16px;
  margin-top:40px;
  grid-template-columns:1fr;
}
@media (min-width:768px){.related{grid-template-columns:repeat(3,minmax(0,1fr))}}
.related a{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:22px 20px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.related a:hover{
  border-color:var(--brand-2);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.related b{display:block;font-size:16.5px}
.related span{display:block;margin-top:8px;font-size:14px;color:var(--ink-soft);line-height:1.8}
.related i{margin-top:14px;display:inline-block;color:var(--accent)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand);
  color:#fff;
  padding:52px 0;
}
@media (min-width:1024px){.cta-band{padding:64px 0}}
.cta-inner{
  display:grid;
  gap:26px;
}
@media (min-width:900px){
  .cta-inner{grid-template-columns:1fr auto;align-items:center;gap:48px}
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);color:#fff}
.cta-inner p{margin-top:10px;font-size:15.5px;color:rgba(255,255,255,.78)}
.cta-form{display:flex;flex-wrap:wrap;gap:12px}
.cta-form input[type="email"]{
  flex:1 1 220px;
  min-width:0;
  padding:12px 16px;
  border:1px solid rgba(255,255,255,.4);
  border-radius:var(--radius-s);
  background:rgba(255,255,255,.08);
  color:#fff;
  font-size:15px;
}
.cta-form input[type="email"]::placeholder{color:rgba(255,255,255,.6)}
.cta-form input[type="email"]:focus{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-color:#fff;
}

/* ---------- footer ---------- */
.site-footer{
  background:#0B2E2A;
  color:rgba(255,255,255,.74);
  padding:56px 0 24px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  gap:34px;
  grid-template-columns:1fr;
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}}
.footer-brand p{margin-top:16px;line-height:1.9;max-width:32em}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius-s);
  color:#fff;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.footer-social a:hover{background:var(--accent);border-color:var(--accent)}
.footer-col h4{
  font-size:15px;
  color:#fff;
  margin-bottom:16px;
}
.footer-col li{margin-bottom:10px}
.footer-col a{
  position:relative;
  color:rgba(255,255,255,.72);
  transition:color .2s var(--ease);
}
.footer-col a:hover{color:#fff}
.footer-sub form{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.footer-sub input{
  flex:1 1 160px;
  min-width:0;
  padding:11px 14px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.26);
  border-radius:var(--radius-s);
  color:#fff;
  font-size:14.5px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.55)}
.footer-sub input:focus{outline:2px solid var(--accent);outline-offset:2px;border-color:#fff}
.footer-sub button{
  padding:11px 20px;
  background:var(--accent);
  color:#fff;
  border:0;
  border-radius:var(--radius-s);
  font-weight:600;
  cursor:pointer;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.footer-sub button:hover{background:#fff;color:var(--brand);transform:translateY(-1px)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.16);
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(255,255,255,.6);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: article */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEDE6;
  --surface:#FFFFFF;
  --ink:#141A18;
  --ink-soft:#5F6B67;
  --line:#DEDCD3;
  --brand:#0E3B36;
  --brand-2:#2F6B60;
  --accent:#D9642A;
  --accent-soft:#F3E2D6;
  --radius-sm:2px;
  --radius:6px;
  --radius-lg:12px;
  --shadow-hover:0 10px 24px rgba(14,59,54,.08);
  --container:1200px;
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius);}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--radius-sm);}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:640px){.container{padding:0 32px;}}
@media (min-width:1024px){.container{padding:0 40px;}}

.mono{font-family:var(--font-mono);}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--brand-2);
}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.logo-en{font-family:var(--font-mono);font-size:17px;color:var(--brand);}
.logo-dot{width:6px;height:6px;border-radius:1px;background:var(--accent);display:inline-block;}
.logo-cn{font-size:17px;color:var(--brand);}

.nav-links{
  display:none;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:9px 12px;
  font-size:15px;
  color:var(--ink-soft);
  border-radius:var(--radius-sm);
  transition:color .2s ease,background-color .2s ease;
}
.nav-links a:hover{color:var(--brand);background:rgba(14,59,54,.05);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--brand);
}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-links + .header-actions{margin-left:16px;}
.icon-btn{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-sm);
  color:var(--ink-soft);
  cursor:pointer;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-2);transform:translateY(-1px);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);
}
.btn-link i{transition:transform .22s ease;}
.btn-link:hover i{transform:translateX(4px);}

.burger{display:inline-flex;}
@media (min-width:1024px){
  .nav-links{display:flex;}
  .burger{display:none;}
}

/* Mobile drawer */
.drawer{
  position:fixed;
  inset:0 0 0 auto;
  width:min(86vw,360px);
  background:var(--surface);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .32s cubic-bezier(.2,.7,.2,1);
  z-index:80;
  display:flex;
  flex-direction:column;
  padding:22px 22px 28px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer nav{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.drawer nav a{
  font-size:19px;
  line-height:56px;
  border-bottom:1px solid var(--line);
  color:var(--ink);
}
.drawer nav a.active{color:var(--brand);font-weight:700;}
.drawer .drawer-cta{margin-top:auto;}
.drawer .drawer-cta .btn{width:100%;}
.overlay{
  position:fixed;inset:0;background:rgba(20,26,24,.42);
  opacity:0;visibility:hidden;transition:opacity .3s ease;z-index:70;
}
.overlay.open{opacity:1;visibility:visible;}

/* ---------- Article ---------- */
.article-hero{
  padding:48px 0 34px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#F7F6F2 0%,#EFEDE6 100%);
}
@media (min-width:768px){.article-hero{padding:64px 0 44px;}}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ink-soft);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--ink-soft);border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.breadcrumb a:hover{color:var(--brand);border-color:var(--brand);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--ink);}

.pill{
  display:inline-block;
  background:var(--accent-soft);
  color:var(--brand);
  font-size:13px;
  padding:4px 10px;
  border-radius:var(--radius-sm);
  font-weight:600;
}
.article-title{
  max-width:840px;
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:700;
  margin:16px 0 20px;
  color:var(--ink);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ink-soft);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--brand-2);}

.article-body{padding:56px 0 16px;}
@media (min-width:768px){.article-body{padding:76px 0 20px;}}
.reading{
  max-width:720px;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  word-break:break-word;
}
.reading p{margin:0 0 24px;}
.reading h2{
  font-size:clamp(22px,2.6vw,26px);
  line-height:1.3;
  letter-spacing:-.01em;
  margin:48px 0 18px;
  padding-left:14px;
  border-left:3px solid var(--brand);
}
.reading h3{font-size:20px;line-height:1.4;margin:34px 0 14px;color:var(--brand);}
.reading h4{font-size:17px;font-weight:700;margin:26px 0 12px;}
.reading ul{margin:0 0 24px;padding-left:4px;}
.reading ul li{position:relative;padding-left:22px;margin-bottom:10px;}
.reading ul li::before{
  content:"";position:absolute;left:2px;top:12px;
  width:7px;height:7px;border-radius:1px;background:var(--accent);
}
.reading ol{margin:0 0 24px;counter-reset:olcount;padding-left:4px;}
.reading ol li{position:relative;padding-left:28px;margin-bottom:10px;counter-increment:olcount;}
.reading ol li::before{
  content:counter(olcount,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:13px;color:var(--accent);line-height:2.4;
}
.reading blockquote{
  margin:0 0 24px;
  padding:18px 22px;
  background:var(--surface);
  border-left:3px solid var(--accent);
  border-radius:0 var(--radius) var(--radius) 0;
  color:var(--ink-soft);
}
.reading blockquote p:last-child{margin-bottom:0;}
.reading img{border-radius:var(--radius);margin:24px 0 10px;}
.reading figure{margin:24px 0;}
.reading figcaption,.reading .caption{font-size:13px;color:var(--ink-soft);margin-top:8px;}
.reading table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 24px;
  font-size:15px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.reading th,.reading td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.reading th{background:var(--bg-alt);font-weight:600;}
.reading tbody tr:nth-child(even){background:#FBFAF7;}
.reading a{color:var(--brand);border-bottom:1px solid var(--brand-2);}
.reading a:hover{color:var(--accent);border-color:var(--accent);}
.reading code{
  font-family:var(--font-mono);
  font-size:14px;
  background:var(--bg-alt);
  padding:2px 6px;
  border-radius:var(--radius-sm);
}
.reading hr{border:0;border-top:1px solid var(--line);margin:40px 0;}

.empty-box{
  max-width:720px;
  margin:0 auto;
  border:1px dashed var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  padding:56px 28px;
  text-align:center;
}
.empty-box i{font-size:26px;color:var(--brand-2);}
.empty-box h2{font-size:20px;margin:16px 0 8px;}
.empty-box p{color:var(--ink-soft);font-size:15px;margin-bottom:22px;}

.article-foot{
  max-width:720px;
  margin:0 auto;
  padding:32px 0 0;
  border-top:1px solid var(--line);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;}
.tag-row .pill{background:var(--bg-alt);color:var(--brand-2);font-weight:500;}
.back-row{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- Related ---------- */
.related{padding:72px 0 8px;}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:12px;margin-bottom:28px;
}
.section-head h2{font-size:clamp(22px,2.8vw,30px);letter-spacing:-.02em;line-height:1.25;}
.related-grid{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:700px){.related-grid{grid-template-columns:repeat(3,1fr);}}
.rel-card{
  display:flex;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
  transition:border-color .24s ease,transform .24s ease,box-shadow .24s ease;
}
.rel-card:hover{border-color:var(--brand-2);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.rel-card .thumb{
  flex:0 0 92px;
  width:92px;height:92px;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--bg-alt);
}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease;}
.rel-card:hover .thumb img{transform:scale(1.04);}
.rel-card .rel-txt{min-width:0;}
.rel-card h3{
  font-size:16px;line-height:1.45;font-weight:700;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card .rel-meta{font-family:var(--font-mono);font-size:12px;color:var(--ink-soft);}

/* ---------- CTA band ---------- */
.cta-band{
  margin:80px 0 0;
  background:var(--brand);
  color:#fff;
}
.cta-inner{
  display:grid;
  gap:24px;
  padding:52px 0;
  align-items:center;
}
@media (min-width:900px){
  .cta-inner{grid-template-columns:1.2fr .8fr;gap:48px;padding:60px 0;}
}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px);line-height:1.3;letter-spacing:-.02em;margin-bottom:10px;}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;max-width:520px;}
.cta-form{display:flex;gap:10px;flex-wrap:wrap;}
.cta-form input{
  flex:1 1 200px;
  min-width:0;
  padding:12px 14px;
  background:transparent;
  border:1px solid rgba(255,255,255,.36);
  border-radius:var(--radius-sm);
  color:#fff;
}
.cta-form input::placeholder{color:rgba(255,255,255,.55);}
.cta-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(217,100,42,.28);}
.cta-form button{
  padding:12px 24px;
  background:var(--accent);
  color:#fff;
  border:1px solid var(--accent);
  border-radius:var(--radius-sm);
  font-weight:600;
  cursor:pointer;
  transition:background-color .2s ease,transform .2s ease;
}
.cta-form button:hover{background:#c0551f;transform:translateY(-1px);}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--brand);
  color:#fff;
  margin-top:0;
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  gap:36px;
  grid-template-columns:1fr;
}
@media (min-width:760px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr;}}
@media (min-width:1060px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:44px;}}
.site-footer .logo-en,.site-footer .logo-cn{color:#fff;}
.footer-brand p{color:rgba(255,255,255,.68);font-size:14px;line-height:1.85;margin:16px 0 20px;max-width:330px;}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius-sm);
  color:rgba(255,255,255,.85);
  transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.footer-social a:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
.footer-col h4{font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-col ul a:hover{color:#fff;border-color:#fff;}
.footer-sub form{display:flex;flex-direction:column;gap:10px;}
.footer-sub input{
  padding:11px 14px;
  background:transparent;
  border:1px solid rgba(255,255,255,.32);
  border-radius:var(--radius-sm);
  color:#fff;
  min-width:0;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.5);}
.footer-sub input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(217,100,42,.26);}
.footer-sub button{
  padding:11px 18px;
  background:#fff;
  color:var(--brand);
  border:1px solid #fff;
  border-radius:var(--radius-sm);
  font-weight:600;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,transform .2s ease;
}
.footer-sub button:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-1px);}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.16);
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:12px;
  color:rgba(255,255,255,.55);
}

/* Reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;transition:none !important;}
}

/* roulang page: category2 */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEDE6;
  --surface:#FFFFFF;
  --ink:#141A18;
  --ink-soft:#5F6B67;
  --line:#DEDCD3;
  --brand:#0E3B36;
  --brand-2:#2F6B60;
  --accent:#D9642A;
  --accent-soft:#F3E2D6;
  --radius-sm:2px;
  --radius:6px;
  --radius-lg:12px;
  --shadow-hover:0 10px 24px rgba(14,59,54,.08);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit;color:inherit}
button{background:none;border:none;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1280px){.container{padding:0 40px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;flex-shrink:0}
.logo-en{font-family:var(--font-mono);font-size:17px;font-weight:700;color:var(--brand);letter-spacing:-.01em}
.logo-dot{width:6px;height:6px;border-radius:1px;background:var(--accent);display:inline-block;flex-shrink:0}
.logo-cn{font-size:17px;font-weight:700;color:var(--ink)}

.nav-links{display:none;align-items:center;gap:2px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-links a{
  position:relative;padding:9px 13px;font-size:14.5px;color:var(--ink-soft);
  border-radius:var(--radius-sm);transition:color .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:12px}
.header-cta{display:none}
@media(min-width:768px){.header-cta{display:inline-flex}}

.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line);border-radius:var(--radius-sm);
  color:var(--brand);transition:border-color .2s,background .2s;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--bg-alt)}
@media(min-width:1024px){.nav-toggle{display:none}}

/* ---------- Drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  transform:translateX(100%);transition:transform .32s cubic-bezier(.2,.7,.2,1);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:52px;margin-bottom:24px}
.drawer-close{
  width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--brand);
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  font-size:20px;line-height:56px;color:var(--ink);border-bottom:1px solid var(--line);
  transition:color .2s,padding-left .2s;
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand);padding-left:6px}
.drawer-foot{margin-top:auto;padding-top:24px}
.drawer-foot .btn{width:100%;justify-content:center}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:14.5px;font-weight:600;padding:11px 20px;white-space:nowrap;
  transition:background .22s cubic-bezier(.2,.7,.2,1),color .22s,border-color .22s,transform .22s;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-light{background:#fff;color:var(--brand)}
.btn-light:hover{background:var(--accent);color:#fff;transform:translateY(-1px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand)}
.btn-text i{transition:transform .22s cubic-bezier(.2,.7,.2,1)}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- Hero ---------- */
.page-hero{padding:44px 0 64px;border-bottom:1px solid var(--line)}
@media(min-width:1024px){.page-hero{padding:56px 0 88px}}
.breadcrumb{
  font-family:var(--font-mono);font-size:13px;color:var(--ink-soft);
  letter-spacing:.02em;margin-bottom:22px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;
}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink)}

.eyebrow{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:inline-block}

.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
.page-hero h1{
  font-size:clamp(32px,5vw,52px);margin:16px 0 18px;line-height:1.18;
}
.hero-lead{font-size:19px;color:var(--ink-soft);max-width:620px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

.hero-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
  margin-top:36px;padding-top:24px;border-top:1px solid var(--line);max-width:560px;
}
.metric-num{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--brand);line-height:1.2}
.metric-label{font-size:13px;color:var(--ink-soft);line-height:1.6}

.hero-media{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:4/5;background:var(--bg-alt);
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,59,54,.04) 0%,rgba(14,59,54,.34) 100%);
}
.hero-badge{
  position:absolute;right:16px;bottom:16px;left:16px;z-index:2;
  background:rgba(247,246,242,.94);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:14px 16px;
}
.hero-badge strong{display:block;font-size:14px;color:var(--brand);margin-bottom:4px}
.hero-badge span{font-size:13px;color:var(--ink-soft);line-height:1.65;display:block}

/* ---------- Sections ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3.2vw,36px);margin:14px 0 14px}
.section-head p{color:var(--ink-soft);font-size:16.5px}

/* ---------- Numbered list ---------- */
.step-list{border-top:1px solid var(--line)}
.step-item{
  display:grid;grid-template-columns:1fr;gap:8px;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background .22s,padding-left .22s;
}
@media(min-width:768px){
  .step-item{
    grid-template-columns:104px 1fr;gap:32px;padding:36px 0;align-items:start;
  }
  .step-item:hover{background:var(--bg-alt);padding-left:16px}
}
.step-num{
  font-family:var(--font-mono);font-size:32px;font-weight:700;color:var(--accent);
  line-height:1;letter-spacing:-.02em;
}
@media(min-width:768px){.step-num{font-size:40px}}
.step-body h3{font-size:20px;margin-bottom:10px}
.step-body p{color:var(--ink-soft);max-width:720px}
.step-body p+p{margin-top:10px}

/* ---------- Flow ---------- */
.flow{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:768px){.flow{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.flow{grid-template-columns:repeat(4,1fr);gap:24px}}
.flow-item{border-top:2px solid var(--brand);padding-top:20px;transition:border-color .22s}
.flow-item:hover{border-color:var(--accent)}
.flow-idx{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  color:var(--ink-soft);display:block;margin-bottom:10px;
}
.flow-item h3{font-size:17px;margin-bottom:8px}
.flow-item p{font-size:14.5px;color:var(--ink-soft)}

/* ---------- Scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.scene-grid{grid-template-columns:repeat(3,1fr)}}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s cubic-bezier(.2,.7,.2,1),border-color .22s,box-shadow .22s;
}
.scene-card:hover{transform:translateY(-2px);border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.scene-media{aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.2,1)}
.scene-card:hover .scene-media img{transform:scale(1.03)}
.scene-body{padding:22px 22px 26px}
.scene-body h3{font-size:18px;margin-bottom:10px}
.scene-body p{font-size:14.5px;color:var(--ink-soft)}
.tag{
  display:inline-block;background:var(--accent-soft);color:var(--brand);
  font-size:13px;border-radius:var(--radius-sm);padding:4px 10px;margin-bottom:12px;
}

/* ---------- Stats ---------- */
.stats-wrap{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media(min-width:1024px){.stats-wrap{grid-template-columns:1fr 1fr;gap:64px}}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 20px}
@media(min-width:1024px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat-num{
  font-family:var(--font-mono);font-size:clamp(40px,5vw,56px);font-weight:700;
  color:var(--brand);line-height:1;letter-spacing:-.03em;
}
.stat-label{font-size:14.5px;color:var(--ink-soft);margin-top:8px}
.partner-box{
  border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:var(--surface);
}
.partner-box h3{font-size:17px;margin-bottom:16px}
.partner-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.partner-list li{
  font-size:13.5px;color:var(--ink-soft);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:12px 14px;text-align:center;
  transition:border-color .22s,color .22s;
}
.partner-list li:hover{border-color:var(--brand-2);color:var(--brand)}

/* ---------- Related links ---------- */
.link-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.link-grid{grid-template-columns:repeat(3,1fr)}}
.link-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;transition:transform .22s cubic-bezier(.2,.7,.2,1),border-color .22s,box-shadow .22s;
}
.link-card:hover{transform:translateY(-2px);border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.link-card .lk-idx{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;color:var(--accent)}
.link-card h3{font-size:18px}
.link-card p{font-size:14.5px;color:var(--ink-soft);flex:1}
.link-card .lk-more{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.link-card:hover .lk-more i{transform:translateX(4px)}
.link-card .lk-more i{transition:transform .22s cubic-bezier(.2,.7,.2,1)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
  gap:20px;padding:22px 0;font-size:17px;font-weight:600;line-height:1.6;
  transition:color .22s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border:1px solid var(--line);border-radius:var(--radius-sm);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);
  font-size:13px;transition:transform .28s cubic-bezier(.2,.7,.2,1),border-color .22s;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--brand)}
.faq-answer{max-width:680px;padding:0 0 26px;color:var(--ink-soft);font-size:15.5px;line-height:1.9}

/* ---------- CTA band ---------- */
.cta-band{background:var(--brand);color:#fff;padding:56px 0}
@media(min-width:1024px){.cta-band{padding:72px 0}}
.cta-grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media(min-width:1024px){.cta-grid{grid-template-columns:1fr 1fr;gap:56px}}
.cta-band h2{font-size:clamp(24px,3vw,34px);color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.78);font-size:15.5px;max-width:520px}
.cta-form{display:flex;flex-wrap:wrap;gap:12px}
.cta-form input{
  flex:1 1 240px;min-width:0;background:transparent;border:1px solid rgba(255,255,255,.42);
  border-radius:var(--radius-sm);padding:12px 16px;color:#fff;font-size:14.5px;
  transition:border-color .22s,background .22s;
}
.cta-form input::placeholder{color:rgba(255,255,255,.6)}
.cta-form input:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.08)}
.cta-form button{
  background:var(--accent);color:#fff;border-radius:var(--radius-sm);
  padding:12px 24px;font-size:14.5px;font-weight:600;
  transition:background .22s,transform .22s;
}
.cta-form button:hover{background:#c1551f;transform:translateY(-1px)}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand);color:#fff;padding:64px 0 28px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:48px}}
.site-footer .logo-en{color:#fff}
.site-footer .logo-cn{color:#fff}
.footer-brand p{color:rgba(255,255,255,.72);margin-top:16px;max-width:340px;font-size:14px;line-height:1.85}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.28);border-radius:var(--radius-sm);color:#fff;
  transition:background .22s,border-color .22s,transform .22s;
}
.footer-social a:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:rgba(255,255,255,.75);font-size:14px;position:relative;display:inline-block}
.footer-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;background:#fff;
  transition:width .22s cubic-bezier(.2,.7,.2,1);
}
.footer-col a:hover{color:#fff}
.footer-col a:hover::after{width:100%}
.footer-sub form{display:flex;flex-direction:column;gap:10px}
.footer-sub input{
  background:transparent;border:1px solid rgba(255,255,255,.32);border-radius:var(--radius-sm);
  padding:11px 14px;color:#fff;font-size:14px;transition:border-color .22s,background .22s;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.55)}
.footer-sub input:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.08)}
.footer-sub button{
  background:var(--accent);color:#fff;border-radius:var(--radius-sm);
  padding:11px 18px;font-size:14px;font-weight:600;transition:background .22s;
}
.footer-sub button:hover{background:#c1551f}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.62);font-family:var(--font-mono);
}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.visible{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
    --bg:#F7F6F2;
    --bg-alt:#EFEDE6;
    --surface:#FFFFFF;
    --ink:#141A18;
    --ink-soft:#5F6B67;
    --line:#DEDCD3;
    --brand:#0E3B36;
    --brand-2:#2F6B60;
    --accent:#D9642A;
    --accent-soft:#F3E2D6;
    --radius-s:2px;
    --radius-m:6px;
    --radius-l:12px;
    --shadow:0 10px 24px rgba(14,59,54,.08);
    --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,monospace;
    --header-h:72px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:96px;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button,input{font-family:inherit;font-size:inherit;}
  button{cursor:pointer;border:0;background:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
    border-radius:var(--radius-s);
  }

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  @media (min-width:640px){ .container{padding:0 32px;} }
  @media (min-width:1024px){ .container{padding:0 40px;} }

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(247,246,242,.94);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    height:var(--header-h);
  }
  .logo-wrap{display:inline-flex;align-items:center;flex:0 0 auto;}
  .logo{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:19px;
    font-weight:700;
    letter-spacing:-.01em;
    white-space:nowrap;
    color:var(--ink);
  }
  .logo-en{font-family:var(--font-mono);font-weight:700;letter-spacing:.02em;}
  .logo-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
  .logo-cn{font-weight:700;}

  .nav-links{display:none;}
  @media (min-width:1024px){
    .nav-links{
      display:flex;
      align-items:center;
      gap:26px;
      flex:1 1 auto;
      justify-content:center;
    }
    .nav-links a{
      position:relative;
      padding:6px 0;
      font-size:15px;
      color:var(--ink-soft);
      transition:color .2s ease;
      white-space:nowrap;
    }
    .nav-links a::after{
      content:"";
      position:absolute;
      left:0;
      bottom:0;
      height:2px;
      width:0;
      background:var(--brand);
      transition:width .22s cubic-bezier(.2,.7,.2,1);
    }
    .nav-links a:hover{color:var(--ink);}
    .nav-links a:hover::after{width:100%;}
    .nav-links a.active{color:var(--brand);font-weight:600;}
    .nav-links a.active::after{width:100%;}
  }

  .header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .icon-btn{
    display:none;
    width:38px;height:38px;
    align-items:center;justify-content:center;
    border:1px solid var(--line);
    border-radius:var(--radius-s);
    color:var(--ink-soft);
    background:var(--surface);
    transition:all .2s ease;
  }
  @media (min-width:1024px){ .icon-btn{display:inline-flex;} }
  .icon-btn:hover{color:var(--brand);border-color:var(--brand-2);}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:11px 22px;
    border-radius:var(--radius-s);
    font-size:15px;
    font-weight:600;
    line-height:1.4;
    border:1px solid transparent;
    transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  }
  .btn i{font-size:13px;transition:transform .22s ease;}
  .btn-primary{background:var(--brand);color:#fff;}
  .btn-primary:hover{background:var(--accent);transform:translateY(-1px);}
  .btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
  .btn-ghost:hover{background:var(--brand);border-color:var(--brand);color:#fff;}
  .btn-light{background:#fff;color:var(--brand);border-color:#fff;}
  .btn-light:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
  .btn-sm{padding:9px 16px;font-size:14px;}
  .btn-link{
    display:inline-flex;align-items:center;gap:6px;
    font-size:15px;font-weight:600;color:var(--brand);
    padding:4px 0;
  }
  .btn-link i{transition:transform .22s ease;}
  .btn-link:hover{color:var(--accent);}
  .btn-link:hover i{transform:translateX(4px);}

  .menu-toggle{
    display:inline-flex;
    width:40px;height:40px;
    align-items:center;justify-content:center;
    border:1px solid var(--line);
    border-radius:var(--radius-s);
    background:var(--surface);
    color:var(--ink);
    font-size:17px;
  }
  @media (min-width:1024px){ .menu-toggle{display:none;} }
  .header-cta{display:none;}
  @media (min-width:768px){ .header-cta{display:inline-flex;} }

  /* 移动抽屉 */
  .drawer{
    position:fixed;
    inset:0;
    z-index:80;
    display:none;
  }
  .drawer.is-open{display:block;}
  .drawer-mask{
    position:absolute;inset:0;
    background:rgba(20,26,24,.5);
    opacity:0;
    transition:opacity .25s ease;
  }
  .drawer.is-open .drawer-mask{opacity:1;}
  .drawer-panel{
    position:absolute;
    top:0;right:0;
    width:min(86vw,340px);
    height:100%;
    background:var(--surface);
    display:flex;
    flex-direction:column;
    transform:translateX(100%);
    transition:transform .3s cubic-bezier(.2,.7,.2,1);
    box-shadow:-12px 0 32px rgba(20,26,24,.12);
  }
  .drawer.is-open .drawer-panel{transform:translateX(0);}
  .drawer-head{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 20px;
    border-bottom:1px solid var(--line);
  }
  .drawer-close{
    width:36px;height:36px;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);
    border-radius:var(--radius-s);
    color:var(--ink);
  }
  .drawer-nav{flex:1 1 auto;overflow-y:auto;padding:8px 0;}
  .drawer-nav a{
    display:block;
    padding:16px 20px;
    font-size:18px;
    color:var(--ink);
    border-bottom:1px solid var(--line);
    transition:background .2s ease,color .2s ease;
  }
  .drawer-nav a:hover,.drawer-nav a.active{background:var(--bg-alt);color:var(--brand);}
  .drawer-foot{padding:20px;border-top:1px solid var(--line);}
  .drawer-foot .btn{width:100%;}

  /* ---------- 页头横幅 ---------- */
  .page-hero{
    position:relative;
    padding:56px 0 52px;
    background-image:linear-gradient(100deg,rgba(14,59,54,.94) 0%,rgba(14,59,54,.80) 52%,rgba(14,59,54,.62) 100%),url(/assets/images/backpic/back-2.png);
    background-size:cover;
    background-position:center;
    color:#fff;
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    right:-80px;bottom:-120px;
    width:340px;height:340px;
    border:1px solid rgba(255,255,255,.14);
    border-radius:50%;
    pointer-events:none;
  }
  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-family:var(--font-mono);
    font-size:13px;
    letter-spacing:.04em;
    color:rgba(255,255,255,.68);
    margin-bottom:22px;
  }
  .breadcrumb a{transition:color .2s ease;}
  .breadcrumb a:hover{color:#fff;}
  .breadcrumb .sep{opacity:.55;}
  .breadcrumb .current{color:rgba(255,255,255,.92);}
  .hero-eyebrow{
    font-family:var(--font-mono);
    font-size:13px;
    letter-spacing:.14em;
    color:var(--accent);
    display:block;
    margin-bottom:14px;
  }
  .page-hero h1{
    font-size:clamp(30px,4.4vw,50px);
    line-height:1.2;
    letter-spacing:-.02em;
    font-weight:700;
    max-width:820px;
  }
  .hero-lead{
    margin-top:18px;
    font-size:17px;
    line-height:1.85;
    color:rgba(255,255,255,.82);
    max-width:660px;
  }
  .hero-metrics{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:18px;
    margin-top:36px;
    padding-top:26px;
    border-top:1px solid rgba(255,255,255,.18);
    max-width:680px;
  }
  .hero-metrics .num{
    font-family:var(--font-mono);
    font-size:clamp(22px,3vw,30px);
    font-weight:700;
    color:#fff;
    line-height:1.2;
  }
  .hero-metrics .lbl{
    display:block;
    font-size:13px;
    color:rgba(255,255,255,.66);
    margin-top:4px;
  }

  /* ---------- 主体布局 ---------- */
  main{display:block;}
  .layout{
    display:grid;
    grid-template-columns:minmax(0,1fr);
    gap:40px;
    padding:56px 0 96px;
  }
  @media (min-width:1024px){
    .layout{
      grid-template-columns:minmax(0,1fr) 274px;
      gap:56px;
      padding:72px 0 112px;
    }
  }

  /* 锚点目录 */
  .toc{
    order:-1;
    position:sticky;
    top:var(--header-h);
    z-index:20;
    background:var(--bg);
    padding:12px 0;
    margin-top:-12px;
  }
  .toc-inner{
    border-bottom:1px solid var(--line);
    padding-bottom:10px;
  }
  .toc-title{
    display:none;
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:.14em;
    color:var(--ink-soft);
    margin-bottom:14px;
  }
  .toc-list{
    display:flex;
    gap:8px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .toc-list::-webkit-scrollbar{display:none;}
  .toc-list a{
    flex:0 0 auto;
    white-space:nowrap;
    font-size:13px;
    padding:7px 13px;
    border:1px solid var(--line);
    border-radius:var(--radius-s);
    background:var(--surface);
    color:var(--ink-soft);
    transition:all .2s ease;
  }
  .toc-list a:hover{border-color:var(--brand-2);color:var(--brand);}
  .toc-list a.is-current{border-color:var(--brand);color:var(--brand);background:var(--accent-soft);}

  @media (min-width:1024px){
    .toc{
      order:0;
      top:96px;
      margin-top:0;
      padding:22px 20px;
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius-m);
      align-self:start;
      max-height:calc(100vh - 132px);
      overflow-y:auto;
    }
    .toc-inner{border-bottom:0;padding-bottom:0;}
    .toc-title{display:block;}
    .toc-list{display:block;overflow:visible;}
    .toc-list a{
      display:block;
      white-space:normal;
      font-size:14px;
      padding:9px 12px;
      border:0;
      border-left:2px solid transparent;
      border-radius:0;
      background:transparent;
      line-height:1.6;
    }
    .toc-list a:hover{background:var(--bg-alt);color:var(--brand);}
    .toc-list a.is-current{
      background:var(--bg-alt);
      color:var(--brand);
      border-left-color:var(--accent);
      font-weight:600;
    }
  }

  /* 正文 */
  .article-body{max-width:780px;}
  .intro-block{
    padding-bottom:8px;
    border-bottom:1px solid var(--line);
    margin-bottom:8px;
  }
  .intro-block p{
    font-size:17px;
    line-height:1.95;
    color:var(--ink-soft);
  }

  .section-block{
    padding:44px 0 8px;
    border-top:1px solid var(--line);
    margin-top:36px;
  }
  .section-block:first-of-type{border-top:0;margin-top:8px;padding-top:8px;}
  .section-head{
    display:flex;
    align-items:baseline;
    gap:16px;
    margin-bottom:20px;
  }
  .section-index{
    font-family:var(--font-mono);
    font-size:15px;
    font-weight:700;
    color:var(--accent);
    letter-spacing:.06em;
    flex:0 0 auto;
    padding-top:4px;
  }
  .section-block h2{
    font-size:clamp(21px,2.4vw,27px);
    line-height:1.35;
    letter-spacing:-.01em;
    font-weight:700;
    color:var(--ink);
  }
  .section-block p{
    font-size:16px;
    line-height:1.95;
    color:var(--ink-soft);
    margin-bottom:18px;
  }
  .section-block p strong{color:var(--ink);font-weight:600;}

  .check-list{margin:6px 0 22px;}
  .check-list li{
    position:relative;
    padding-left:24px;
    margin-bottom:12px;
    font-size:16px;
    line-height:1.85;
    color:var(--ink-soft);
  }
  .check-list li::before{
    content:"";
    position:absolute;
    left:2px;
    top:12px;
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--accent);
    opacity:.85;
  }
  .check-list li strong{color:var(--ink);font-weight:600;}

  .figure-block{
    margin:26px 0 30px;
    border-radius:var(--radius-m);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--surface);
  }
  .figure-block img{
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
  }
  .figure-block figcaption{
    padding:12px 16px;
    font-size:13px;
    color:var(--ink-soft);
    border-top:1px solid var(--line);
    background:var(--bg);
  }

  .note-box{
    border-left:3px solid var(--accent);
    background:var(--accent-soft);
    padding:18px 20px;
    border-radius:0 var(--radius-m) var(--radius-m) 0;
    margin:6px 0 24px;
  }
  .note-box p{
    margin:0;
    font-size:15px;
    line-height:1.85;
    color:var(--brand);
  }

  /* 相关栏目 */
  .related{
    margin-top:64px;
    padding-top:44px;
    border-top:1px solid var(--line);
  }
  .related h2{
    font-size:clamp(21px,2.4vw,26px);
    font-weight:700;
    letter-spacing:-.01em;
    margin-bottom:8px;
  }
  .related-sub{
    font-size:15px;
    color:var(--ink-soft);
    margin-bottom:26px;
  }
  .related-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
  }
  @media (min-width:700px){ .related-grid{grid-template-columns:repeat(3,minmax(0,1fr));} }
  .related-card{
    display:flex;
    flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-m);
    overflow:hidden;
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .related-card:hover{
    transform:translateY(-2px);
    border-color:var(--brand-2);
    box-shadow:var(--shadow);
  }
  .related-card .thumb{
    overflow:hidden;
    aspect-ratio:4/3;
    background:var(--bg-alt);
  }
  .related-card .thumb img{
    width:100%;height:100%;object-fit:cover;
    transition:transform .45s cubic-bezier(.2,.7,.2,1);
  }
  .related-card:hover .thumb img{transform:scale(1.04);}
  .related-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto;}
  .related-card .tag{
    align-self:flex-start;
    font-size:13px;
    line-height:1.6;
    padding:3px 10px;
    border-radius:var(--radius-s);
    background:var(--accent-soft);
    color:var(--brand);
  }
  .related-card h3{
    font-size:18px;
    font-weight:700;
    line-height:1.5;
    letter-spacing:-.01em;
  }
  .related-card p{
    font-size:14px;
    line-height:1.8;
    color:var(--ink-soft);
    flex:1 1 auto;
  }
  .related-card .more{
    font-size:14px;
    font-weight:600;
    color:var(--brand);
    display:inline-flex;
    align-items:center;
    gap:6px;
  }
  .related-card .more i{transition:transform .22s ease;}
  .related-card:hover .more{color:var(--accent);}
  .related-card:hover .more i{transform:translateX(4px);}

  /* FAQ */
  .faq-section{
    margin-top:64px;
    padding-top:44px;
    border-top:1px solid var(--line);
  }
  .faq-section h2{
    font-size:clamp(21px,2.4vw,26px);
    font-weight:700;
    letter-spacing:-.01em;
    margin-bottom:22px;
  }
  .faq-item{
    border-top:1px solid var(--line);
  }
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:20px;
    padding:20px 0;
    font-size:17px;
    font-weight:600;
    line-height:1.65;
    color:var(--ink);
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand);}
  .faq-item summary .plus{
    flex:0 0 auto;
    width:22px;height:22px;
    position:relative;
    margin-top:4px;
    transition:transform .25s ease;
  }
  .faq-item summary .plus::before,
  .faq-item summary .plus::after{
    content:"";
    position:absolute;
    background:var(--brand-2);
    border-radius:1px;
  }
  .faq-item summary .plus::before{left:0;top:10px;width:22px;height:2px;}
  .faq-item summary .plus::after{left:10px;top:0;width:2px;height:22px;}
  .faq-item[open] summary{color:var(--brand);}
  .faq-item[open] summary .plus{transform:rotate(45deg);}
  .faq-answer{
    padding:0 0 22px;
    max-width:680px;
    font-size:16px;
    line-height:1.9;
    color:var(--ink-soft);
    animation:fadeIn .3s ease;
  }
  @keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

  /* CTA 窄带 */
  .cta-band{
    background:var(--brand);
    color:#fff;
    padding:44px 0;
  }
  .cta-inner{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
    align-items:center;
  }
  @media (min-width:900px){
    .cta-inner{grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:40px;}
  }
  .cta-band h2{
    font-size:clamp(20px,2.6vw,28px);
    font-weight:700;
    letter-spacing:-.01em;
    line-height:1.35;
  }
  .cta-band p{
    margin-top:8px;
    font-size:15px;
    color:rgba(255,255,255,.75);
  }
  .cta-form{display:flex;gap:10px;flex-wrap:wrap;}
  .cta-form input{
    flex:1 1 200px;
    min-width:0;
    padding:12px 14px;
    border:1px solid rgba(255,255,255,.35);
    border-radius:var(--radius-s);
    background:rgba(255,255,255,.06);
    color:#fff;
    font-size:15px;
    transition:border-color .2s ease,background .2s ease;
  }
  .cta-form input::placeholder{color:rgba(255,255,255,.55);}
  .cta-form input:focus{
    outline:none;
    border-color:var(--accent);
    background:rgba(255,255,255,.12);
  }
  .cta-form .btn{flex:0 0 auto;}

  /* 页脚 */
  .site-footer{
    background:var(--brand);
    color:rgba(255,255,255,.82);
    padding:64px 0 28px;
    font-size:15px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:36px;
  }
  @media (min-width:700px){
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px;}
  }
  @media (min-width:1024px){
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;}
  }
  .footer-brand .logo{color:#fff;}
  .footer-brand p{
    margin-top:16px;
    font-size:14px;
    line-height:1.9;
    color:rgba(255,255,255,.66);
    max-width:320px;
  }
  .footer-social{display:flex;gap:10px;margin-top:20px;}
  .footer-social a{
    width:36px;height:36px;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid rgba(255,255,255,.25);
    border-radius:var(--radius-s);
    color:rgba(255,255,255,.8);
    transition:all .22s ease;
  }
  .footer-social a:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
  .footer-col h4{
    font-size:15px;
    font-weight:600;
    color:#fff;
    margin-bottom:18px;
    font-family:var(--font-mono);
    letter-spacing:.08em;
  }
  .footer-col ul li{margin-bottom:12px;}
  .footer-col ul a{
    position:relative;
    font-size:14px;
    color:rgba(255,255,255,.7);
    transition:color .2s ease;
  }
  .footer-col ul a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-3px;
    height:1px;
    width:0;
    background:var(--accent);
    transition:width .22s ease;
  }
  .footer-col ul a:hover{color:#fff;}
  .footer-col ul a:hover::after{width:100%;}
  .footer-sub form{display:flex;gap:8px;flex-wrap:wrap;}
  .footer-sub input{
    flex:1 1 150px;
    min-width:0;
    padding:11px 12px;
    border:1px solid rgba(255,255,255,.3);
    border-radius:var(--radius-s);
    background:rgba(255,255,255,.06);
    color:#fff;
    font-size:14px;
  }
  .footer-sub input::placeholder{color:rgba(255,255,255,.5);}
  .footer-sub input:focus{outline:none;border-color:var(--accent);}
  .footer-sub button{
    padding:11px 18px;
    border-radius:var(--radius-s);
    background:#fff;
    color:var(--brand);
    font-size:14px;
    font-weight:600;
    transition:all .22s ease;
  }
  .footer-sub button:hover{background:var(--accent);color:#fff;}
  .footer-bottom{
    margin-top:48px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.16);
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    justify-content:space-between;
    font-family:var(--font-mono);
    font-size:13px;
    color:rgba(255,255,255,.55);
  }

  /* 动效 */
  .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1);
  }
  .reveal.is-visible{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;transition:none;}
    *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  }

/* roulang page: category3 */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEDE6;
  --surface:#FFFFFF;
  --ink:#141A18;
  --ink-soft:#5F6B67;
  --line:#DEDCD3;
  --brand:#0E3B36;
  --brand-2:#2F6B60;
  --accent:#D9642A;
  --accent-soft:#F3E2D6;
  --radius-s:2px;
  --radius-m:6px;
  --radius-l:12px;
  --shadow-hover:0 10px 24px rgba(14,59,54,.08);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.02em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1280px){.container{padding:0 40px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:7px;font-size:18px;font-weight:700;letter-spacing:-.02em;white-space:nowrap}
.logo-en{font-family:var(--font-mono);color:var(--brand);letter-spacing:.01em}
.logo-dot{width:6px;height:6px;border-radius:1px;background:var(--accent);display:inline-block;flex:0 0 auto}
.logo-cn{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;font-size:15px;color:var(--ink-soft);padding:6px 0;transition:color .2s ease}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);transition:width .22s cubic-bezier(.2,.7,.2,1)}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-s);
  padding:12px 22px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent}
.btn-light:hover{background:#fff;color:var(--brand);border-color:#fff}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:14px 28px;font-size:16px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);font-size:15px}
.link-arrow i{transition:transform .22s ease}
.link-arrow:hover i{transform:translateX(4px)}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--radius-s);cursor:pointer;color:var(--brand);font-size:17px;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:var(--brand-2);background:var(--bg-alt)}

.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.7,.2,1);
  display:flex;flex-direction:column;padding:20px 20px 28px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:52px}
.drawer-close{width:42px;height:42px;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius-s);cursor:pointer;color:var(--brand);font-size:17px}
.drawer-nav{margin-top:18px;display:flex;flex-direction:column}
.drawer-nav a{font-size:20px;line-height:56px;border-bottom:1px solid var(--line);color:var(--ink-soft);transition:color .2s ease,padding-left .2s ease}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand);padding-left:6px}
.drawer-cta{margin-top:auto;padding-top:24px}
.drawer-cta .btn{width:100%}

@media(max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-primary{display:none}
}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-color:var(--brand);
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  color:#fff;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(14,59,54,.96) 0%,rgba(14,59,54,.9) 52%,rgba(47,107,96,.82) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:34px;padding-bottom:66px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:rgba(255,255,255,.66)}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .2s ease}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:rgba(255,255,255,.95)}

.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;margin-top:30px}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:end}}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--accent);text-transform:none;
}
.page-hero .eyebrow{color:#F0B08A}
.hero-title{font-size:clamp(32px,5vw,54px);margin-top:16px;color:#fff}
.hero-title .hl{color:#F0B08A}
.hero-sub{margin-top:18px;font-size:19px;line-height:1.7;color:rgba(255,255,255,.86);max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;padding:5px 11px;border-radius:var(--radius-s);
  background:rgba(255,255,255,.11);border:1px solid rgba(255,255,255,.24);color:#fff;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

.hero-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  border-top:1px solid rgba(255,255,255,.24);padding-top:24px;
}
.hero-metrics .num{font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);font-weight:700;color:#fff;line-height:1.1}
.hero-metrics .lbl{font-size:13px;color:rgba(255,255,255,.72);margin-top:6px}

.hero-side{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius-l);
  padding:22px;
  backdrop-filter:blur(4px);
}
.hero-side h2{font-size:17px;color:#fff;letter-spacing:0}
.hero-side ul{margin-top:14px;display:flex;flex-direction:column;gap:12px}
.hero-side li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.84);line-height:1.65}
.hero-side li i{color:#F0B08A;margin-top:6px;font-size:12px}

/* ---------- sections ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px}
.section-head h2{font-size:clamp(24px,3.2vw,36px);margin-top:12px}
.section-head p{margin-top:16px;color:var(--ink-soft);font-size:17px}

/* intro */
.intro-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.intro-grid{grid-template-columns:7fr 5fr;gap:56px;align-items:start}}
.intro-copy h2{font-size:clamp(24px,3.2vw,34px);margin-top:14px}
.intro-copy p{margin-top:18px;color:var(--ink-soft);font-size:17px}
.intro-list{margin-top:26px;display:flex;flex-direction:column;gap:0}
.intro-list li{display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--line);font-size:15px}
.intro-list li:last-child{border-bottom:1px solid var(--line)}
.intro-list .idx{font-family:var(--font-mono);color:var(--accent);font-size:13px;min-width:26px;padding-top:2px}

.panel{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);padding:24px;
}
.panel h3{font-size:18px}
.panel .panel-sub{margin-top:8px;font-size:14px;color:var(--ink-soft)}
.progress{margin-top:22px;display:flex;flex-direction:column;gap:18px}
.progress-item .row{display:flex;justify-content:space-between;font-size:14px;margin-bottom:8px}
.progress-item .row .name{font-weight:600}
.progress-item .row .val{font-family:var(--font-mono);color:var(--brand-2);font-size:13px}
.bar{height:6px;background:var(--bg-alt);border-radius:99px;overflow:hidden}
.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--brand-2),var(--accent));border-radius:99px}

/* card matrix 2x3 */
.card-matrix{display:grid;grid-template-columns:1fr;gap:20px;margin-top:40px}
@media(min-width:640px){.card-matrix{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-matrix{grid-template-columns:repeat(3,1fr);gap:24px}}
.matrix-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.matrix-card:hover{transform:translateY(-2px);border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.matrix-card .thumb{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.matrix-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.matrix-card:hover .thumb img{transform:scale(1.03)}
.matrix-card .thumb .badge{
  position:absolute;left:12px;top:12px;
  background:rgba(14,59,54,.88);color:#fff;font-size:12px;
  padding:4px 10px;border-radius:var(--radius-s);font-family:var(--font-mono);letter-spacing:.04em;
}
.matrix-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.matrix-card h3{font-size:18px}
.matrix-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.8}
.matrix-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:6px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent-soft);color:var(--brand);
  font-size:13px;padding:4px 10px;border-radius:var(--radius-s);
}
.chip-plain{background:var(--bg-alt);color:var(--ink-soft)}

/* steps */
.steps{margin-top:44px;display:flex;flex-direction:column}
.step{
  display:grid;grid-template-columns:1fr;gap:10px;
  padding:26px 0;border-top:1px solid var(--line);
}
.step:last-child{border-bottom:1px solid var(--line)}
@media(min-width:768px){.step{grid-template-columns:96px 1fr;gap:28px}}
.step .no{font-family:var(--font-mono);font-size:clamp(28px,4vw,44px);font-weight:700;color:var(--accent);line-height:1;letter-spacing:-.02em}
.step h3{font-size:20px}
.step p{margin-top:10px;color:var(--ink-soft);font-size:16px;max-width:760px}
.step .meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}

/* data strip */
.data-strip{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:640px){.data-strip{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.data-strip{grid-template-columns:repeat(4,1fr);gap:24px}}
.data-block{border-top:1px solid var(--line);padding-top:18px}
.data-block .num{font-family:var(--font-mono);font-size:clamp(32px,4.4vw,48px);font-weight:700;color:var(--brand);line-height:1.05}
.data-block .cap{margin-top:10px;font-size:15px;font-weight:600}
.data-block .desc{margin-top:6px;font-size:14px;color:var(--ink-soft)}

/* hotspot grid */
.hot-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px}
@media(min-width:768px){.hot-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.hot-grid{grid-template-columns:repeat(3,1fr)}}
.hot-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:20px;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.hot-card:hover{transform:translateY(-2px);border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.hot-card .hot-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.hot-card h3{font-size:16.5px;margin-top:14px}
.hot-card p{margin-top:8px;font-size:14.5px;color:var(--ink-soft)}
.hot-level{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--accent)}

/* related */
.related-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media(min-width:768px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.related-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.related-card:hover{transform:translateY(-2px);border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.related-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.related-card:hover .thumb img{transform:scale(1.03)}
.related-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.related-card h3{font-size:17px;position:relative}
.related-card h3::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--accent);transition:width .26s cubic-bezier(.2,.7,.2,1)}
.related-card:hover h3::after{width:100%}
.related-card p{font-size:14px;color:var(--ink-soft)}
.related-card .more{margin-top:auto;padding-top:8px;font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}

/* FAQ */
.faq{margin-top:36px;max-width:900px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-of-type{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;font-size:17px;font-weight:600;transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand-2)}
.faq summary .ico{
  flex:0 0 auto;width:26px;height:26px;border:1px solid var(--line);border-radius:var(--radius-s);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);font-size:12px;
  transition:transform .26s ease,border-color .26s ease,color .26s ease;
}
.faq details[open] summary .ico{transform:rotate(45deg);border-color:var(--accent);color:var(--accent)}
.faq .answer{padding:0 0 24px;max-width:700px;font-size:15.5px;color:var(--ink-soft)}

/* CTA band */
.cta-band{background:var(--brand);color:#fff}
.cta-band .inner{
  display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
  padding:52px 0;
}
@media(min-width:900px){.cta-band .inner{grid-template-columns:7fr 5fr;gap:40px;padding:60px 0}}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);color:#fff}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.8);font-size:16px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:900px){.cta-actions{justify-content:flex-end}}

/* footer */
.site-footer{background:var(--brand);color:rgba(255,255,255,.82);padding:64px 0 28px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px}}
.footer-brand .logo{margin-bottom:16px}
.site-footer .logo-en,.site-footer .logo-cn{color:#fff}
.site-footer .logo-dot{background:var(--accent)}
.footer-brand p{color:rgba(255,255,255,.72);max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border:1px solid rgba(255,255,255,.28);border-radius:var(--radius-s);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;
  transition:background-color .22s ease,border-color .22s ease,transform .22s ease;
}
.footer-social a:hover{background:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;letter-spacing:0}
.footer-col li{margin-bottom:10px}
.footer-col a{position:relative;color:rgba(255,255,255,.76);transition:color .2s ease}
.footer-col a::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--accent);transition:width .22s ease}
.footer-col a:hover{color:#fff}
.footer-col a:hover::after{width:100%}
.footer-sub form{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.footer-sub input{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.26);
  border-radius:var(--radius-s);padding:11px 14px;font-size:14px;color:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.5)}
.footer-sub input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.14)}
.footer-sub button{
  background:var(--accent);color:#fff;border:none;border-radius:var(--radius-s);
  padding:11px 14px;font-size:14px;font-weight:600;cursor:pointer;
  transition:background-color .22s ease,transform .22s ease;
}
.footer-sub button:hover{background:#c2581f;transform:translateY(-1px)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:rgba(255,255,255,.56);
}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}