/* roulang page: index */
:root{
  --primary:#0f172a;--accent:#f59e0b;--bg:#f8fafc;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;
  --r:16px;--rs:10px;--shadow:0 4px 24px rgba(15,23,42,.08);--shadow-lg:0 12px 40px rgba(15,23,42,.14);
  --tr:all .3s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.search-box{display:flex;align-items:center;gap:8px;background:#f1f5f9;border:1px solid transparent;border-radius:999px;padding:8px 16px;transition:var(--tr)}
.search-box:focus-within{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(245,158,11,.2)}
.nav-tab{white-space:nowrap;padding:8px 20px;border-radius:999px;font-size:14px;font-weight:500;color:#cbd5e1;transition:var(--tr)}
.nav-tab:hover{color:#fff;background:rgba(255,255,255,.12)}
.nav-tab.active{background:var(--accent);color:#0f172a;font-weight:600}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#0f172a;font-weight:600;padding:12px 28px;border-radius:999px;transition:var(--tr);border:2px solid transparent;cursor:pointer}
.btn-primary:hover{background:transparent;color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.btn-outline{display:inline-flex;align-items:center;gap:8px;border:2px solid rgba(255,255,255,.5);color:#fff;font-weight:500;padding:12px 28px;border-radius:999px;transition:var(--tr);cursor:pointer}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.card{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--tr)}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.tag{display:inline-flex;align-items:center;padding:4px 14px;border-radius:999px;font-size:12px;font-weight:500;background:#f1f5f9;color:#475569}
.tag-accent{background:rgba(245,158,11,.12);color:#b45309}
.badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);color:#fff;padding:6px 16px;border-radius:999px;font-size:13px;backdrop-filter:blur(8px)}
.hero-overlay{position:relative;background:linear-gradient(rgba(15,23,42,.75),rgba(15,23,42,.85)),url('/assets/images/backpic/back-1.png')center/cover no-repeat}
.section{padding:80px 0}
.section-alt{background:#fff}
.section-soft{background:#f1f5f9}
.section-title{font-size:34px;font-weight:700;color:var(--primary);line-height:1.3}
.section-sub{font-size:15px;color:var(--muted);max-width:640px;margin:12px auto 0}
.divider{width:56px;height:4px;background:var(--accent);border-radius:4px;margin:16px auto}
.faq-item{border:1px solid var(--border);border-radius:var(--rs);background:#fff;overflow:hidden;transition:var(--tr)}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item p{padding:0 24px 20px;color:var(--muted);font-size:14px;line-height:1.8}
.stat-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:var(--r);padding:30px 20px;text-align:center;backdrop-filter:blur(6px);transition:var(--tr)}
.stat-card:hover{background:rgba(255,255,255,.14)}
.stat-num{font-size:38px;font-weight:700;color:var(--accent)}
.footer-link{color:#94a3b8;font-size:14px;transition:var(--tr)}
.footer-link:hover{color:#fff}
.mobile-menu{display:none}
@media(max-width:768px){
  .section{padding:50px 0}
  .section-title{font-size:26px}
  .nav-tab{padding:6px 14px;font-size:13px}
  .mobile-menu.open{display:block}
  .desktop-only{display:none!important}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .stat-num{font-size:28px}
}

:root{
  --primary:#0f172a;--accent:#f59e0b;--bg:#f8fafc;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;
  --r:16px;--rs:10px;--shadow:0 4px 24px rgba(15,23,42,.08);--shadow-lg:0 12px 40px rgba(15,23,42,.14);
  --tr:all .3s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.search-box{display:flex;align-items:center;gap:8px;background:#f1f5f9;border:1px solid transparent;border-radius:999px;padding:8px 16px;transition:var(--tr)}
.search-box:focus-within{border-color:var(--accent);background:#fff}
.nav-tab{white-space:nowrap;padding:8px 20px;border-radius:999px;font-size:14px;font-weight:500;color:#cbd5e1;transition:var(--tr)}
.nav-tab:hover{color:#fff;background:rgba(255,255,255,.12)}
.nav-tab.active{background:var(--accent);color:#0f172a;font-weight:600}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#0f172a;font-weight:600;padding:12px 28px;border-radius:999px;transition:var(--tr);border:2px solid transparent;cursor:pointer}
.btn-primary:hover{background:transparent;color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.card{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--tr)}
.card:hover{box-shadow:var(--shadow-lg)}
.tag{display:inline-flex;align-items:center;padding:4px 14px;border-radius:999px;font-size:12px;font-weight:500;background:#f1f5f9;color:#475569}
.tag-accent{background:rgba(245,158,11,.12);color:#b45309}
.section{padding:80px 0}
.article-body{font-size:16px;line-height:2;color:#334155}
.article-body p{margin-bottom:1.2em}
.article-body h2{font-size:22px;font-weight:700;margin:1.6em 0 .8em;color:var(--primary)}
.article-body h3{font-size:18px;font-weight:600;margin:1.4em 0 .6em;color:var(--primary)}
.article-body img{border-radius:var(--rs);margin:1.2em 0}
.article-body ul{margin:1em 0;padding-left:1.5em;list-style:disc}
.footer-link{color:#94a3b8;font-size:14px;transition:var(--tr)}
.footer-link:hover{color:#fff}
@media(max-width:768px){
  .section{padding:50px 0}
}

:root{
  --primary:#0f172a;--accent:#f59e0b;--bg:#f8fafc;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;
  --r:16px;--rs:10px;--shadow:0 4px 24px rgba(15,23,42,.08);--shadow-lg:0 12px 40px rgba(15,23,42,.14);
  --tr:all .3s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.search-box{display:flex;align-items:center;gap:8px;background:#f1f5f9;border:1px solid transparent;border-radius:999px;padding:8px 16px;transition:var(--tr)}
.search-box:focus-within{border-color:var(--accent);background:#fff}
.nav-tab{white-space:nowrap;padding:8px 20px;border-radius:999px;font-size:14px;font-weight:500;color:#cbd5e1;transition:var(--tr)}
.nav-tab:hover{color:#fff;background:rgba(255,255,255,.12)}
.nav-tab.active{background:var(--accent);color:#0f172a;font-weight:600}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#0f172a;font-weight:600;padding:12px 28px;border-radius:999px;transition:var(--tr);border:2px solid transparent;cursor:pointer}
.btn-primary:hover{background:transparent;color:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.card{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--tr)}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.tag{display:inline-flex;align-items:center;padding:4px 14px;border-radius:999px;font-size:12px;font-weight:500;background:#f1f5f9;color:#475569}
.tag-accent{background:rgba(245,158,11,.12);color:#b45309}
.section{padding:80px 0}
.section-alt{background:#fff}
.section-title{font-size:34px;font-weight:700;color:var(--primary);line-height:1.3}
.divider{width:56px;height:4px;background:var(--accent);border-radius:4px;margin:16px auto}
.faq-item{border:1px solid var(--border);border-radius:var(--rs);background:#fff;overflow:hidden;transition:var(--tr)}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item p{padding:0 24px 20px;color:var(--muted);font-size:14px}
.footer-link{color:#94a3b8;font-size:14px;transition:var(--tr)}
.footer-link:hover{color:#fff}
@media(max-width:768px){
  .section{padding:50px 0}
  .section-title{font-size:26px}
}

/* roulang page: article */
:root {
    --color-primary: #f59e0b;
    --color-primary-dark: #d97706;
    --color-secondary: #1e293b;
    --color-dark: #0f172a;
    --color-bg: #f8fafc;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --radius: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 16px;
  }
  a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
  img { max-width: 100%; height: auto; display: block; }
  button, input, textarea { font-family: inherit; }

  .container { width: 100%; max-width: 1280px; margin: 0 auto; padding-left: 1.25rem; padding-right: 1.25rem; }

  .no-scrollbar::-webkit-scrollbar { display: none; }
  .no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

  /* Navigation */
  .nav-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.925rem;
    font-weight: 500;
    color: #94a3b8;
    white-space: nowrap;
    transition: all 0.25s ease;
  }
  .nav-tab:hover { color: #f59e0b; background: rgba(245, 158, 11, 0.08); }
  .nav-tab.active { color: #f59e0b; background: rgba(245, 158, 11, 0.15); }

  .top-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: #e2e8f0;
    transition: color 0.2s ease;
  }
  .top-nav-link:hover { color: #f59e0b; }
  .top-nav-link.active { color: #f59e0b; }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    transition: all 0.25s ease;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    border: none;
    cursor: pointer;
  }
  .btn-primary:hover { box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5); transform: translateY(-2px); }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3); }
  .btn-primary:focus { outline: 2px solid rgba(245, 158, 11, 0.4); outline-offset: 2px; }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    background: transparent;
    transition: all 0.25s ease;
    cursor: pointer;
  }
  .btn-outline:hover { background: rgba(245, 158, 11, 0.08); }
  .btn-outline:active { transform: scale(0.98); }
  .btn-outline:focus { outline: 2px solid rgba(245, 158, 11, 0.3); outline-offset: 2px; }

  .footer-link {
    font-size: 0.9rem;
    color: #94a3b8;
    transition: all 0.2s ease;
  }
  .footer-link:hover { color: #f59e0b; padding-left: 4px; }

  /* Article Content */
  .article-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #334155;
  }
  .article-body h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0f172a;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #f1f5f9;
  }
  .article-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1e293b;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
  }
  .article-body p {
    margin-bottom: 1rem;
  }
  .article-body ul, .article-body ol {
    margin: 0.75rem 0 1.25rem 1.25rem;
  }
  .article-body li {
    margin-bottom: 0.35rem;
  }
  .article-body a {
    color: #d97706;
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .article-body a:hover { color: #b45309; }
  .article-body blockquote {
    border-left: 4px solid #f59e0b;
    background: #fffbeb;
    padding: 1rem 1.5rem;
    margin: 1.25rem 0;
    border-radius: 0 12px 12px 0;
    font-style: italic;
    color: #57534e;
  }
  .article-body img { border-radius: 12px; margin: 1.5rem 0; box-shadow: var(--shadow-md); }
  .article-body pre {
    background: #0f172a;
    color: #e2e8f0;
    padding: 1.25rem;
    border-radius: 12px;
    overflow-x: auto;
    font-size: 0.9rem;
    margin: 1.25rem 0;
  }
  .article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: 0.95rem;
  }
  .article-body th {
    background: #f1f5f9;
    font-weight: 600;
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid #e2e8f0;
  }
  .article-body td {
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
  }
  .article-body tr:nth-child(even) td { background: #f8fafc; }

  .tag-chip {
    display: inline-block;
    padding: 0.25rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    margin-right: 0.5rem;
    margin-top: 0.25rem;
  }

  .card {
    background: #ffffff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
  }
  .card:hover {
    box-shadow: var(--shadow-md);
  }

  /* FAQ */
  .faq-item {
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 1.25rem 1.5rem;
    background: #ffffff;
    transition: box-shadow 0.25s ease;
  }
  .faq-item:hover { box-shadow: var(--shadow-md); }
  .faq-item summary {
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    color: #1e293b;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '＋';
    font-size: 1.1rem;
    color: #f59e0b;
    font-weight: 700;
    transition: transform 0.3s ease;
  }
  .faq-item[open] summary::after { transform: rotate(45deg); }
  .faq-item .faq-answer {
    margin-top: 0.875rem;
    font-size: 0.95rem;
    color: #64748b;
    line-height: 1.75;
  }

  /* Focus states */
  a:focus, button:focus {
    outline: 2px solid rgba(245, 158, 11, 0.4);
    outline-offset: 2px;
  }

  /* Breadcrumb */
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #94a3b8;
    flex-wrap: wrap;
  }
  .breadcrumb a:hover { color: #f59e0b; }
  .breadcrumb .sep { color: #cbd5e1; }

  /* Hero for article */
  .article-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #334155 100%);
    position: relative;
    overflow: hidden;
  }
  .article-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    pointer-events: none;
  }
  .article-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
    pointer-events: none;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1.1rem;
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 500;
  }

  /* Related card */
  .related-card {
    background: #ffffff;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid #f1f5f9;
    transition: all 0.3s ease;
  }
  .related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(245, 158, 11, 0.3);
  }

  .meta-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: #94a3b8;
  }

  /* CTA */
  .cta-section {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #b45309 100%);
    position: relative;
    overflow: hidden;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  }

  @media (max-width: 768px) {
    .article-hero h1 { font-size: 1.6rem !important; line-height: 1.4 !important; }
    .article-body { font-size: 1rem; }
    .nav-tab { padding: 0.4rem 1rem; font-size: 0.84rem; }
  }

  @media (max-width: 520px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
    .article-hero { min-height: 320px; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  }

/* roulang page: category1 */
:root {
      --primary: #f59e0b;
      --primary-dark: #d97706;
      --primary-light: #fbbf24;
      --dark: #0f172a;
      --dark-light: #1e293b;
      --light-bg: #f8fafc;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border: #e2e8f0;
      --radius: 0.875rem;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
      --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 14px 36px rgba(15, 23, 42, 0.12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
      background: var(--light-bg);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; display: block; }
    button { font-family: inherit; border: none; background: none; cursor: pointer; }
    input { font-family: inherit; }

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

    .no-scrollbar::-webkit-scrollbar { display: none; }
    .no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

    /* 导航标签 */
    .nav-tab {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.45rem 1rem;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 500;
      color: #94a3b8;
      white-space: nowrap;
      transition: all 0.25s ease;
      border: 1px solid transparent;
    }
    .nav-tab:hover { color: #fff; background: rgba(255,255,255,0.08); }
    .nav-tab.active {
      background: var(--primary);
      color: #0f172a;
      font-weight: 600;
      box-shadow: 0 2px 12px rgba(245,158,11,0.35);
      border-color: rgba(255,255,255,0.12);
    }

    /* 卡片悬浮 */
    .card-hover {
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    }
    .card-hover:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #fde68a;
    }
    .cover-img { transition: transform 0.5s ease; }
    .group:hover .cover-img { transform: scale(1.06); }
    .group:focus-within .cover-img { transform: scale(1.06); }

    /* 页脚链接 */
    .footer-link { transition: color 0.25s; font-size: 0.875rem; }
    .footer-link:hover { color: #fbbf24; }

    /* 徽章 */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      padding: 0.2rem 0.7rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }
    .badge-blue { background: #e0f2fe; color: #0369a1; border-color: #bae6fd; }
    .badge-green { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
    .badge-purple { background: #ede9fe; color: #5b21b6; border-color: #ddd6fe; }

    /* FAQ */
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    .faq-item.open { border-color: #fbbf24; box-shadow: 0 4px 18px rgba(245,158,11,0.12); }
    .faq-btn {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.1rem 1.25rem;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      text-align: left;
    }
    .faq-btn:hover { color: #b45309; }
    .faq-icon { color: var(--primary); transition: transform 0.35s ease; flex-shrink: 0; }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      padding: 0 1.25rem;
      color: var(--text-muted);
    }
    .faq-item.open .faq-answer { max-height: 360px; padding-bottom: 1.1rem; }
    .faq-item.open .faq-icon { transform: rotate(45deg); }

    /* 流程卡片 */
    .step-card {
      position: relative;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 1rem;
      padding: 1.75rem 1.5rem;
      transition: background 0.3s, border-color 0.3s, transform 0.3s;
    }
    .step-card:hover {
      background: rgba(255,255,255,0.09);
      border-color: rgba(245,158,11,0.4);
      transform: translateY(-4px);
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: transparent;
      -webkit-text-stroke: 1.5px #f59e0b;
      line-height: 1;
      margin-bottom: 0.75rem;
    }

    /* 时间线圆点 */
    .timeline-dot {
      position: absolute;
      left: -30px;
      top: 1.75rem;
      width: 12px;
      height: 12px;
      border-radius: 9999px;
      background: var(--primary);
      box-shadow: 0 0 0 4px rgba(245,158,11,0.2);
    }

    /* 可访问性 */
    a:focus-visible, button:focus-visible {
      outline: 2px solid #f59e0b;
      outline-offset: 2px;
      border-radius: 4px;
    }
    input:focus-visible { outline: none; }

    /* 响应式微调 */
    @media (max-width: 640px) {
      .step-num { font-size: 2rem; }
      .timeline-dot { left: -23px; }
    }