/* roulang page: index */
:root {
  --deep-blue: #0A1E3C;
  --page-bg: #071120;
  --cyan: #20E3FF;
  --violet: #7B6CFF;
  --text-main: #E3EDF5;
  --text-secondary: #8CA3B8;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --light-bg: #F4F7FB;
  --light-text: #1F2A37;
  --light-secondary: #5B6B7C;
  --card-radius: 16px;
  --shadow-glow: 0 0 20px rgba(32, 227, 255, 0.45), 0 4px 16px rgba(32, 227, 255, 0.2);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, "Segoe UI", sans-serif;
  background: var(--page-bg);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button, input { font-family: inherit; }

.container-site {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}
@media (min-width: 768px) {
  .container-site { padding: 0 2rem; }
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(7, 17, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.brand-row { height: 56px; }
.channel-row { height: 44px; }
.brand-dot {
  width: 10px; height: 10px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan), 0 0 28px rgba(32, 227, 255, 0.6);
}
.channel-nav {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.channel-nav::-webkit-scrollbar { display: none; }
.channel-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s;
  height: 100%;
}
.channel-link:hover { color: var(--cyan); }
.channel-link.active { color: #fff; }
.channel-link.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(32, 227, 255, 0.6);
}

/* ===== Buttons ===== */
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #20E3FF, #0891B2);
  color: #fff;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 12px;
  box-shadow: var(--shadow-glow);
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1.5;
}
.btn-glow:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 28px rgba(32, 227, 255, 0.6), 0 6px 20px rgba(32, 227, 255, 0.28);
}
.btn-glow:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}
.btn-glow .arrow-icon { transition: transform 0.2s; }
.btn-glow:hover .arrow-icon { transform: translateX(4px); }
.btn-glow.btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: 10px; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  font-weight: 500;
  padding: 12px 28px;
  border-radius: 12px;
  transition: all 0.2s;
  font-size: 0.95rem;
  cursor: pointer;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); }
.btn-ghost:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ===== Glass Card ===== */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.22);
}

/* ===== Step Number ===== */
.step-num {
  font-size: 3rem;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.35);
  line-height: 1;
  display: block;
}

/* ===== Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.6;
}
.badge-cyan {
  border: 1px solid rgba(32, 227, 255, 0.4);
  background: rgba(32, 227, 255, 0.1);
  color: var(--cyan);
}
.badge-light {
  background: rgba(32, 227, 255, 0.12);
  color: #0B7285;
}
.badge-white {
  background: rgba(255, 255, 255, 0.1);
  color: #E3EDF5;
}

/* ===== Light Section ===== */
.light-section { background: var(--light-bg); color: var(--light-text); }
.light-section .section-sub { color: var(--light-secondary); }
.light-card {
  background: #fff;
  border: 1px solid #E2E9F1;
  border-radius: var(--card-radius);
  box-shadow: 0 4px 12px rgba(15, 34, 58, 0.06);
  transition: all 0.2s ease;
  overflow: hidden;
}
.light-card:hover {
  box-shadow: 0 8px 24px rgba(15, 34, 58, 0.12);
  transform: translateY(-4px);
}

/* ===== Section Heading ===== */
.section-heading {
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-sub { font-size: 0.95rem; line-height: 1.6; }

/* ===== Hero ===== */
.hero-glow {
  background:
    radial-gradient(circle at 80% 30%, rgba(32, 227, 255, 0.14), transparent 50%),
    radial-gradient(circle at 20% 90%, rgba(123, 108, 255, 0.1), transparent 40%),
    linear-gradient(180deg, #0A1E3C 0%, #071120 100%);
}
.grid-lines {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ===== FAQ ===== */
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.faq-item.open .faq-answer { max-height: 320px; }
.faq-icon { transition: transform 0.2s ease; }
.faq-item.open .faq-icon { transform: rotate(45deg); }

/* ===== Form ===== */
.form-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  color: #fff;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-size: 0.875rem;
}
.form-input::placeholder { color: rgba(255, 255, 255, 0.35); }
.form-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(32, 227, 255, 0.2);
}

/* ===== News Card ===== */
.news-card {
  display: flex;
  background: #fff;
  border: 1px solid #E2E9F1;
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(15, 34, 58, 0.05);
}
.news-card:hover {
  background: #FBFDFE;
  border-color: rgba(32, 227, 255, 0.5);
  box-shadow: 0 8px 24px rgba(15, 34, 58, 0.1);
  transform: translateY(-2px);
}
.news-cover {
  width: 96px;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(32, 227, 255, 0.15), rgba(123, 108, 255, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #0B7285;
}
@media (max-width: 640px) {
  .news-cover { width: 72px; }
}
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Footer ===== */
.footer-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--cyan); }
.qr-placeholder {
  width: 96px; height: 96px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}
.divider-white {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

/* ===== Focus visible global ===== */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .brand-row { height: 52px; }
  .channel-row { height: 42px; }
  .hero-title {
    font-size: 2rem;
    line-height: 1.25;
  }
  .section-heading { font-size: 1.4rem !important; }
  .btn-glow, .btn-ghost { padding: 10px 20px; font-size: 0.85rem; }
}
@media (max-width: 520px) {
  .channel-nav { gap: 1.1rem; }
  .news-cover { display: none; }
  .cta-form .btn-glow { width: 100%; }
}

/* ===== Scrollbar ===== */
*::-webkit-scrollbar { width: 8px; height: 6px; }
*::-webkit-scrollbar-track { background: rgba(255,255,255,0.03); }
*::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 8px; }
.light-section *::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); }

/* roulang page: category1 */
:root {
    --bg-dark: #071120;
    --bg-navy: #0A1E3C;
    --bg-deep: #0C1F3B;
    --primary: #20E3FF;
    --violet: #7B6CFF;
    --text-primary: #E3EDF5;
    --text-secondary: #8CA3B8;
    --light-bg: #F4F7FB;
    --light-text: #1F2A37;
    --light-text-secondary: #5B6B7C;
    --glass-bg: rgba(255,255,255,0.06);
    --glass-border: rgba(255,255,255,0.12);
    --gray-line: #E2E9F1;
    --card-radius: 16px;
    --btn-radius: 12px;
    --shadow-glow: 0 0 20px rgba(32,227,255,0.45), 0 4px 16px rgba(32,227,255,0.2);
    --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, "Segoe UI", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.75;
    margin: 0;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button {
    font-family: inherit;
    border: none;
    cursor: pointer;
  }

  input {
    font-family: inherit;
  }

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

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

  .container-site {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 768px) {
    .container-site {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  .text-text-primary {
    color: var(--text-primary);
  }

  .text-text-secondary {
    color: var(--text-secondary);
  }

  .text-primary {
    color: var(--primary);
  }

  .bg-dark {
    background-color: var(--bg-dark);
  }

  .bg-navy {
    background-color: var(--bg-navy);
  }

  /* 导航 */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(7, 17, 32, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .brand-row {
    height: 56px;
  }

  .brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 9999px;
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary), 0 0 24px rgba(32, 227, 255, 0.4);
    display: inline-block;
    flex-shrink: 0;
  }

  .channel-row {
    height: 44px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }

  .channel-nav {
    display: flex;
    align-items: stretch;
    gap: 2rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .channel-nav::-webkit-scrollbar {
    display: none;
  }

  .channel-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }

  .channel-link:hover {
    color: var(--primary);
  }

  .channel-link.active {
    color: #fff;
    font-weight: 600;
  }

  .channel-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px 2px 0 0;
    box-shadow: 0 0 8px var(--primary);
  }

  /* 按钮 */
  .btn-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #20E3FF, #06B8D9);
    color: #062C3B;
    font-weight: 700;
    font-size: 0.9375rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--btn-radius);
    box-shadow: var(--shadow-glow);
    transition: all 0.2s ease;
    border-bottom: 3px solid rgba(4, 120, 150, 0.7);
    min-height: 48px;
  }

  .btn-glow:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 28px rgba(32, 227, 255, 0.6), 0 6px 20px rgba(32, 227, 255, 0.28);
  }

  .btn-glow:active {
    transform: translateY(1px);
  }

  .btn-glow:focus-visible,
  .btn-ghost:focus-visible,
  .channel-link:focus-visible,
  .footer-link:focus-visible,
  .faq-question:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
  }

  .btn-sm {
    min-height: 36px;
    padding: 0.4rem 1rem;
    font-size: 0.8125rem;
    border-radius: 10px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #fff;
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--btn-radius);
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
    min-height: 48px;
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(32, 227, 255, 0.4);
    transform: translateY(-1px);
  }

  .btn-block {
    width: 100%;
  }

  /* Hero */
  .hero-channel {
    padding-top: 132px;
    position: relative;
    overflow: hidden;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.32;
  }

  .hero-overlay {
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 75% 30%, rgba(32, 227, 255, 0.18), transparent 55%),
      radial-gradient(ellipse at 15% 80%, rgba(123, 108, 255, 0.12), transparent 50%),
      linear-gradient(to bottom, rgba(7, 17, 32, 0.72), rgba(7, 17, 32, 0.94));
  }

  .hero-figure {
    position: relative;
  }

  .hero-img {
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    aspect-ratio: 4 / 3;
    object-fit: cover;
    width: 100%;
  }

  .hero-glow {
    position: absolute;
    top: 18%;
    right: -12%;
    width: 60%;
    height: 60%;
    background: rgba(32, 227, 255, 0.2);
    filter: blur(60px);
    border-radius: 50%;
    z-index: -1;
  }

  .badge-hero {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid rgba(32, 227, 255, 0.4);
    background: rgba(32, 227, 255, 0.1);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    margin-bottom: 1.25rem;
  }

  /* 区块 */
  .section-dark {
    background: var(--bg-dark);
  }

  .section-light {
    background: var(--light-bg);
    color: var(--light-text);
  }

  .section-head {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--primary);
    border: 1px solid rgba(32, 227, 255, 0.35);
    background: rgba(32, 227, 255, 0.08);
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    margin-bottom: 1rem;
  }

  .section-tag.light-tag {
    color: #06B8D9;
    border-color: rgba(6, 184, 217, 0.35);
    background: rgba(6, 184, 217, 0.08);
  }

  .section-head h2 {
    font-size: 1.875rem;
    font-weight: 800;
  }

  .section-head p {
    color: var(--text-secondary);
    margin-top: 0.75rem;
    font-size: 1rem;
  }

  .section-light .section-head h2 {
    color: var(--light-text);
  }

  .section-light .section-head p {
    color: var(--light-text-secondary);
  }

  /* 卡片 */
  .glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--card-radius);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25), inset 1px 1px 0 rgba(255, 255, 255, 0.08);
    padding: 2rem;
    position: relative;
    transition: transform 0.2s ease, border-color 0.2s ease;
  }

  .glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(32, 227, 255, 0.4);
  }

  .white-card {
    background: #fff;
    border: 1px solid var(--gray-line);
    border-radius: var(--card-radius);
    box-shadow: 0 8px 20px rgba(31, 42, 55, 0.06);
    padding: 2rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  }

  .white-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 30px rgba(31, 42, 55, 0.1);
    border-color: #C9D8E6;
  }

  .white-card h3 {
    color: var(--light-text);
  }

  /* 合作模式 */
  .mode-num {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, rgba(32, 227, 255, 0.7), rgba(123, 108, 255, 0.7));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .mode-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(32, 227, 255, 0.15), rgba(123, 108, 255, 0.15));
    color: var(--primary);
    margin-top: 1.25rem;
    margin-bottom: 1.25rem;
  }

  .mode-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
  }

  .mode-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
  }

  .mode-list {
    margin-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1rem;
    display: grid;
    gap: 0.5rem;
  }

  .mode-list li {
    position: relative;
    padding-left: 1.25rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
  }

  .mode-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
  }

  /* 支持政策 */
  .policy-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(32, 227, 255, 0.15), rgba(123, 108, 255, 0.15));
    color: #06B8D9;
    margin-bottom: 1.25rem;
  }

  .policy-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
  }

  .policy-card p {
    color: var(--light-text-secondary);
    font-size: 0.9375rem;
  }

  .policy-card ul {
    margin-top: 1rem;
    display: grid;
    gap: 0.4rem;
  }

  .policy-card ul li {
    position: relative;
    padding-left: 1.1rem;
    font-size: 0.875rem;
    color: var(--light-text-secondary);
  }

  .policy-card ul li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: #06B8D9;
    font-weight: 800;
    font-size: 1.25rem;
    line-height: 1;
  }

  /* 申请流程 */
  .step-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px rgba(255, 255, 255, 0.35);
    line-height: 1;
  }

  .step-card h3 {
    margin-top: 1.25rem;
    font-size: 1.125rem;
    font-weight: 700;
  }

  .step-card p {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
  }

  .step-arrow {
    display: none;
    color: rgba(255, 255, 255, 0.3);
    position: absolute;
    top: 50%;
    right: -1.75rem;
    transform: translateY(-50%);
    z-index: 1;
  }

  @media (min-width: 768px) {
    .step-arrow {
      display: block;
    }
  }

  /* FAQ */
  .faq-item {
    overflow: hidden;
  }

  .faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--light-text);
    background: transparent;
    width: 100%;
    text-align: left;
    padding: 0;
    cursor: pointer;
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid rgba(31, 42, 55, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #06B8D9;
    transition: transform 0.25s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, margin-top 0.3s ease;
    font-size: 0.9375rem;
    color: var(--light-text-secondary);
  }

  .faq-item.open .faq-answer {
    max-height: 320px;
    margin-top: 0.75rem;
  }

  /* CTA */
  .cta-card {
    background: linear-gradient(135deg, #091B36, #0A2A4A);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
  }

  .cta-card::after {
    content: "";
    position: absolute;
    top: -30%;
    right: -10%;
    width: 50%;
    height: 80%;
    background: radial-gradient(circle, rgba(32, 227, 255, 0.18), transparent 65%);
    pointer-events: none;
  }

  .cta-list {
    display: grid;
    gap: 0.75rem;
    margin-top: 1.5rem;
  }

  .cta-list li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
  }

  .cta-list li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 999px;
    background: rgba(32, 227, 255, 0.15);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
  }

  .cta-form .form-group {
    margin-bottom: 1rem;
  }

  .cta-form label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: rgba(227, 237, 245, 0.9);
  }

  .cta-form input {
    width: 100%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    color: #fff;
    font-size: 0.9375rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .cta-form input::placeholder {
    color: rgba(140, 163, 184, 0.7);
  }

  .cta-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(32, 227, 255, 0.15);
  }

  .form-note {
    font-size: 0.75rem;
    color: rgba(140, 163, 184, 0.7);
    text-align: center;
    margin-top: 0.75rem;
  }

  /* 页脚 */
  .footer-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
  }

  .footer-link:hover {
    color: var(--primary);
  }

  .divider-white {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
  }

  .qr-placeholder {
    width: 96px;
    height: 96px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
  }

  /* 响应式 */
  @media (max-width: 1024px) {
    .hero-channel {
      padding-top: 114px;
    }

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

  @media (max-width: 767px) {
    .hero-channel {
      padding-top: 106px;
    }

    .channel-nav {
      gap: 1.25rem;
    }

    .section-head h2 {
      font-size: 1.5rem;
    }

    .cta-card {
      padding: 1.5rem;
    }

    .glass-card,
    .white-card {
      padding: 1.5rem;
    }

    .mode-num {
      font-size: 2.5rem;
    }
  }

  @media (max-width: 520px) {
    .brand-row .btn-glow span {
      display: none;
    }

    .hero-channel {
      padding-top: 102px;
    }

    .section-head {
      text-align: left;
    }
  }

/* roulang page: article */
:root {
  --bg-page: #071120;
  --bg-panel: #0A1E3C;
  --accent: #20E3FF;
  --accent-2: #7B6CFF;
  --text-primary: #E3EDF5;
  --text-secondary: #8CA3B8;
  --card-bg: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.12);
  --radius-card: 16px;
  --radius-btn: 12px;
  --shadow-glow: 0 0 20px rgba(32,227,255,0.45), 0 4px 16px rgba(32,227,255,0.2);
  --transition: 200ms ease;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, "Segoe UI", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button, input, textarea { font-family: inherit; }

.container-site {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
}
@media (min-width: 768px) {
  .container-site { padding: 0 32px; }
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(7,17,32,0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-row { height: 56px; }
.brand-dot {
  width: 10px; height: 10px;
  border-radius: 9999px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(32,227,255,0.9), 0 0 24px rgba(32,227,255,0.5);
  display: inline-block;
  flex-shrink: 0;
}
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff !important;
  border: none;
  border-radius: var(--radius-btn);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(32,227,255,0.6), 0 6px 24px rgba(32,227,255,0.25);
}
.btn-glow:active { transform: translateY(0); }
.btn-glow:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-btn);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.4);
  transform: translateY(-1px);
}
.channel-row {
  height: 44px;
  border-top: 1px solid rgba(255,255,255,0.05);
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-row::-webkit-scrollbar { display: none; }
.channel-nav { display: flex; align-items: center; gap: 28px; height: 100%; white-space: nowrap; }
.channel-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: color var(--transition);
}
.channel-link:hover { color: var(--accent); }
.channel-link.active { color: #fff; border-bottom-color: var(--accent); font-weight: 600; }

.main-wrap { padding-top: 100px; }

/* Breadcrumb */
.breadcrumb-area {
  padding: 18px 0 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(10,30,60,0.35);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: rgba(255,255,255,0.3); }
.breadcrumb .current {
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Article Section */
.article-section { padding: 40px 0 56px; }
.article-header { text-align: center; margin-bottom: 36px; }
.article-cat-tag {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(32,227,255,0.12);
  border: 1px solid rgba(32,227,255,0.35);
  letter-spacing: 0.04em;
}
.article-title {
  font-size: 1.875rem;
  line-height: 1.3;
  font-weight: 800;
  color: #fff;
  margin: 16px 0 12px;
  letter-spacing: -0.02em;
}
@media (min-width: 768px) {
  .article-title { font-size: 2.5rem; }
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 28px;
  font-size: 13px;
  color: var(--text-secondary);
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-excerpt {
  max-width: 720px;
  margin: 20px auto 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 20px 48px rgba(2,8,20,0.35);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: "";
  position: absolute;
  top: 0; left: 32px; right: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(32,227,255,0.5), transparent);
}
@media (min-width: 768px) {
  .article-card { padding: 48px; }
}

/* Article Content */
.article-content { font-size: 16px; word-wrap: break-word; }
.article-content > *:first-child { margin-top: 0; }
.article-content p {
  margin: 0 0 1.5em;
  color: var(--text-primary);
  line-height: 1.85;
}
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5 {
  color: #fff;
  font-weight: 700;
  line-height: 1.35;
  margin: 2rem 0 1rem;
}
.article-content h2 { font-size: 1.5rem; }
.article-content h3 { font-size: 1.25rem; }
.article-content h4 { font-size: 1.125rem; }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(32,227,255,0.06);
  padding: 16px 20px;
  margin: 1.5rem 0;
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content code {
  background: rgba(255,255,255,0.1);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
  color: var(--accent);
  word-break: break-all;
}
.article-content pre {
  background: rgba(2,8,20,0.7);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 14px;
}
.article-content pre code { background: none; padding: 0; color: #E3EDF5; }
.article-content img {
  border-radius: 16px;
  margin: 1.5rem auto;
  display: block;
  box-shadow: 0 12px 32px rgba(2,8,20,0.3);
}
.article-content ul,
.article-content ol {
  margin: 1rem 0 1.5rem;
  padding-left: 1.5rem;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
  color: var(--text-secondary);
}
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-content a:hover { text-decoration: none; }
.article-content hr {
  border: none;
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 2rem 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 14px;
}
.article-content th,
.article-content td {
  border: 1px solid rgba(255,255,255,0.12);
  padding: 10px 14px;
  text-align: left;
}
.article-content th {
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-weight: 600;
}

/* Article Footer */
.article-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.tag-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  margin: 4px 4px 4px 0;
  transition: color var(--transition), border-color var(--transition);
}
.tag-badge:hover { color: var(--accent); border-color: rgba(32,227,255,0.4); }
.post-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}
@media (min-width: 640px) {
  .post-nav { grid-template-columns: 1fr 1fr; }
}
.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  transition: background var(--transition), border-color var(--transition);
}
.post-nav-link:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(32,227,255,0.3);
}
.post-nav-link.disabled { opacity: 0.5; pointer-events: none; }
.post-nav-label { font-size: 12px; color: var(--text-secondary); }
.post-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.post-nav-link.next { text-align: right; }
.post-nav-link.next .post-nav-label { justify-content: flex-end; }
.back-to-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  transition: gap var(--transition);
}
.back-to-category:hover { gap: 10px; }

/* Not Found */
.not-found-card {
  text-align: center;
  padding: 56px 24px;
}
.not-found-card .nf-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  color: rgba(255,255,255,0.35);
}

/* Related Section */
.related-section {
  background: #F4F7FB;
  padding: 64px 0;
  color: #1F2A37;
}
@media (min-width: 768px) {
  .related-section { padding: 96px 0; }
}
.related-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #1F2A37;
  margin: 0;
}
.related-header p {
  color: #5B6B7C;
  font-size: 14px;
  margin: 8px 0 0;
}
.related-card {
  background: #fff;
  border: 1px solid #E2E9F1;
  border-radius: 16px;
  padding: 20px;
  display: flex;
  gap: 16px;
  height: 100%;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(15,30,60,0.12);
  border-color: #CFE0ED;
}
.related-thumb {
  flex-shrink: 0;
  width: 96px;
  height: 84px;
  border-radius: 12px;
  overflow: hidden;
  background: #E9F0F6;
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.related-card .rel-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: #06B8D9;
  background: rgba(6,184,217,0.1);
  padding: 3px 10px;
  border-radius: 9999px;
  margin-bottom: 8px;
}
.related-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1F2A37;
  line-height: 1.4;
  margin: 0 0 6px;
}
.related-card p {
  font-size: 13px;
  color: #5B6B7C;
  line-height: 1.6;
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .rel-meta {
  font-size: 12px;
  color: #9AA7B4;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.related-card .rel-link {
  color: #06B8D9;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}

/* CTA Section */
.cta-section {
  padding: 64px 0;
  background: var(--bg-page);
  position: relative;
  overflow: hidden;
}
@media (min-width: 768px) {
  .cta-section { padding: 96px 0; }
}
.cta-inner {
  position: relative;
  background: rgba(10,30,60,0.85);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 48px 24px;
  text-align: center;
  overflow: hidden;
}
@media (min-width: 768px) {
  .cta-inner { padding: 80px 48px; }
}
.cta-inner::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -20%;
  width: 50%;
  height: 200%;
  background: radial-gradient(circle, rgba(32,227,255,0.25), transparent 70%);
  pointer-events: none;
}
.cta-inner::after {
  content: "";
  position: absolute;
  bottom: -60%;
  left: -20%;
  width: 50%;
  height: 200%;
  background: radial-gradient(circle, rgba(123,108,255,0.2), transparent 70%);
  pointer-events: none;
}
.cta-inner > * { position: relative; z-index: 1; }
.cta-inner h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
}
@media (min-width: 768px) {
  .cta-inner h2 { font-size: 2.25rem; }
}
.cta-inner p {
  color: var(--text-secondary);
  max-width: 560px;
  margin: 12px auto 28px;
  font-size: 15px;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 48px 0 32px;
  background: rgba(10,30,60,0.3);
}
.footer-link {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color var(--transition);
}
.footer-link:hover { color: var(--accent); }
.divider-white {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 32px 0 24px;
}
.qr-placeholder {
  width: 88px;
  height: 88px;
  border: 1px dashed rgba(255,255,255,0.25);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
}

/* Back to top */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-panel);
  color: var(--accent);
  border: 1px solid rgba(32,227,255,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
  box-shadow: var(--shadow-glow);
}
.back-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover { background: rgba(32,227,255,0.15); }

/* Responsive */
@media (max-width: 768px) {
  .article-title { font-size: 1.5rem; }
  .article-card { padding: 24px 18px; }
  .related-card { flex-direction: column; }
  .related-thumb { width: 100%; height: 140px; }
  .container-site { padding: 0 16px; }
}

/* roulang page: category3 */
:root {
      --primary: #0A1E3C;
      --bg: #071120;
      --bg-alt: #0A1528;
      --accent: #20E3FF;
      --accent2: #7B6CFF;
      --glass-bg: rgba(255,255,255,0.06);
      --glass-border: rgba(255,255,255,0.12);
      --text-main: #E3EDF5;
      --text-secondary: #8CA3B8;
      --surface: #F4F7FB;
      --surface-text: #1F2A37;
      --surface-text-secondary: #5B6B7C;
      --success: #34D399;
      --warning: #F59E0B;
      --error: #F87171;
      --radius: 16px;
      --radius-sm: 12px;
      --shadow-glow: 0 0 20px rgba(32,227,255,0.45), 0 4px 16px rgba(32,227,255,0.2);
      --shadow-card: 0 12px 32px rgba(0,0,0,0.3);
      --transition: 200ms ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, "Segoe UI", sans-serif;
      background: var(--bg);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { cursor: pointer; font-family: inherit; }
    input { font-family: inherit; }
    .container-site { max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
    @media (min-width: 768px) { .container-site { padding: 0 2rem; } }
    .text-text-secondary { color: var(--text-secondary); }

    /* ===== Header ===== */
    .site-header {
      position: fixed; top: 0; left: 0; right: 0; z-index: 50;
      background: rgba(7,17,32,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .brand-row { height: 56px; }
    .brand-dot {
      width: 10px; height: 10px; border-radius: 999px;
      background: var(--accent);
      box-shadow: 0 0 12px var(--accent), 0 0 24px rgba(32,227,255,0.4);
      flex-shrink: 0;
    }
    .channel-row {
      height: 44px;
      border-top: 1px solid rgba(255,255,255,0.04);
    }
    .channel-nav {
      display: flex;
      gap: 2rem;
      overflow-x: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-nav::-webkit-scrollbar { display: none; }
    .channel-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      height: 100%;
      white-space: nowrap;
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: color 200ms ease;
    }
    .channel-link:hover { color: var(--accent); }
    .channel-link.active { color: #fff; font-weight: 600; }
    .channel-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
      box-shadow: 0 0 8px rgba(32,227,255,0.6);
      border-radius: 2px 2px 0 0;
    }

    /* ===== Buttons ===== */
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      background: linear-gradient(135deg, #20E3FF, #0FC8EA);
      color: #071120;
      font-weight: 700;
      border-radius: 12px;
      padding: 0.625rem 1.25rem;
      font-size: 0.875rem;
      border: none;
      box-shadow: var(--shadow-glow);
      transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
      cursor: pointer;
    }
    .btn-glow:hover {
      transform: translateY(-1px);
      box-shadow: 0 0 28px rgba(32,227,255,0.6), 0 6px 24px rgba(32,227,255,0.3);
      color: #071120;
    }
    .btn-glow:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
    }
    .btn-glow svg { transition: transform 200ms ease; }
    .btn-glow:hover svg { transform: translateX(4px); }
    .btn-sm { padding: 0.45rem 0.9rem; font-size: 0.8rem; border-radius: 10px; }
    .btn-lg { padding: 0.875rem 2rem; font-size: 1rem; border-radius: 14px; }
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      background: rgba(255,255,255,0.06);
      color: #fff;
      font-weight: 600;
      border-radius: 12px;
      padding: 0.75rem 1.5rem;
      font-size: 0.9rem;
      border: 1px solid rgba(255,255,255,0.15);
      transition: background 200ms ease, border-color 200ms ease, transform 200ms ease;
      cursor: pointer;
    }
    .btn-ghost:hover {
      background: rgba(255,255,255,0.12);
      border-color: rgba(255,255,255,0.25);
      color: #fff;
      transform: translateY(-1px);
    }

    /* ===== Tag capsule ===== */
    .tag-capsule {
      display: inline-block;
      padding: 0.3rem 0.9rem;
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--accent);
      background: rgba(32,227,255,0.08);
      border: 1px solid rgba(32,227,255,0.3);
      letter-spacing: 0.05em;
    }

    /* ===== Glass card ===== */
    .glass-card {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.08);
      transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(255,255,255,0.22);
      box-shadow: 0 16px 40px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
    }

    /* ===== About Hero ===== */
    .about-hero {
      position: relative;
      padding-top: calc(100px + 3rem);
      padding-bottom: 5rem;
      overflow: hidden;
    }
    .about-hero .bg-layer {
      position: absolute;
      inset: 0;
    }
    .about-hero .bg-layer img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
    }
    .about-hero .bg-layer::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, rgba(7,17,32,0.92), rgba(7,17,32,0.85) 50%, #071120);
    }
    .grid-overlay {
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 32px 32px;
      mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 0%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 0%, transparent 75%);
    }

    /* ===== Timeline ===== */
    .timeline {
      position: relative;
      max-width: 44rem;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2.5rem;
    }
    .timeline::before {
      content: '';
      position: absolute;
      left: 11px;
      top: 4px;
      bottom: 4px;
      width: 2px;
      background: linear-gradient(to bottom, var(--accent), rgba(32,227,255,0.05));
    }
    .timeline-item {
      position: relative;
      margin-bottom: 2rem;
    }
    .timeline-item:last-child { margin-bottom: 0; }
    .timeline-dot {
      position: absolute;
      left: -2.5rem;
      top: 6px;
      width: 24px;
      height: 24px;
      border-radius: 999px;
      background: #0A1528;
      border: 3px solid var(--accent);
      box-shadow: 0 0 12px rgba(32,227,255,0.35);
      z-index: 1;
    }
    .timeline-card {
      padding: 1.5rem 1.75rem;
      border-radius: 16px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      transition: background 200ms ease, border-color 200ms ease;
    }
    .timeline-card:hover {
      background: rgba(255,255,255,0.08);
      border-color: rgba(32,227,255,0.3);
    }

    /* ===== Team ===== */
    .team-card {
      padding: 2rem 1.5rem;
      text-align: center;
      border-radius: 16px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      transition: transform 200ms ease, border-color 200ms ease, background 200ms ease;
    }
    .team-card:hover {
      transform: translateY(-4px);
      border-color: rgba(32,227,255,0.35);
      background: rgba(255,255,255,0.07);
    }
    .team-avatar {
      width: 76px;
      height: 76px;
      border-radius: 999px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 800;
      color: #fff;
      text-shadow: 0 1px 4px rgba(0,0,0,0.3);
      box-shadow: 0 4px 16px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.2);
    }
    .grad-cyan-blue { background: linear-gradient(135deg, #20E3FF, #0A6BD8); }
    .grad-purple-pink { background: linear-gradient(135deg, #7B6CFF, #E35CD7); }
    .grad-blue-teal { background: linear-gradient(135deg, #0A6BD8, #20E3FF); }
    .grad-orange-pink { background: linear-gradient(135deg, #FF9A5C, #E35CD7); }

    /* ===== Value cards ===== */
    .value-card {
      padding: 2rem 1.75rem;
      border-radius: 16px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      transition: transform 200ms ease, border-color 200ms ease, background 200ms ease;
    }
    .value-card:hover {
      transform: translateY(-4px);
      border-color: rgba(32,227,255,0.3);
      background: rgba(255,255,255,0.07);
    }
    .value-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(32,227,255,0.1);
      border: 1px solid rgba(32,227,255,0.25);
      margin-bottom: 1rem;
    }

    /* ===== CTA ===== */
    .cta-glow {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
    }

    /* ===== Footer ===== */
    .footer-link {
      color: var(--text-secondary);
      font-size: 0.875rem;
      transition: color 200ms ease;
    }
    .footer-link:hover { color: var(--accent); }
    .qr-placeholder {
      width: 120px;
      height: 120px;
      border: 2px dashed rgba(255,255,255,0.2);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      font-size: 0.75rem;
      background: rgba(255,255,255,0.02);
    }
    .divider-white {
      height: 1px;
      background: rgba(255,255,255,0.08);
    }

    /* ===== Section headings ===== */
    .section-heading {
      font-size: 1.875rem;
      font-weight: 800;
      line-height: 1.3;
    }
    @media (min-width: 768px) {
      .section-heading { font-size: 2rem; }
    }
    .section-sub {
      color: var(--text-secondary);
      margin-top: 0.5rem;
    }

    /* ===== Responsive ===== */
    @media (max-width: 767px) {
      .about-hero { padding-top: calc(100px + 1.5rem); }
      .timeline { padding-left: 1.75rem; }
      .timeline-dot { left: -1.75rem; }
      .team-card { padding: 1.5rem 1rem; }
      .value-card { padding: 1.5rem 1.25rem; }
    }

/* roulang page: category2 */
:root {
  --primary: #0A1E3C;
  --deep: #071120;
  --accent: #20E3FF;
  --violet: #7B6CFF;
  --text-main: #E3EDF5;
  --text-secondary: #8CA3B8;
  --light-bg: #F4F7FB;
  --light-text: #1F2A37;
  --light-secondary: #5B6B7C;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --radius-xl: 16px;
  --radius-lg: 12px;
  --radius-full: 999px;
  --shadow-glow: 0 0 20px rgba(32,227,255,0.45), 0 4px 16px rgba(32,227,255,0.2);
  --font-sans: "PingFang SC","Microsoft YaHei",system-ui,"Segoe UI",sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:var(--font-sans); background:var(--deep); color:var(--text-main); line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
button { cursor:pointer; border:none; background:none; }
input, button, textarea, select { font-family:inherit; }
ul, ol { list-style:none; }

.container-site { max-width:1280px; margin:0 auto; padding:0 16px; }
@media (min-width:768px) { .container-site { padding:0 32px; } }

.site-header { position:fixed; top:0; left:0; right:0; z-index:100; background:rgba(7,17,32,0.85); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px); border-bottom:1px solid rgba(255,255,255,0.05); }
.brand-row { height:56px; }
.brand-dot { display:inline-block; width:10px; height:10px; border-radius:999px; background:var(--accent); box-shadow:0 0 12px rgba(32,227,255,0.8); }
.channel-row { height:44px; border-top:1px solid rgba(255,255,255,0.05); overflow-x:auto; scrollbar-width:none; }
.channel-row::-webkit-scrollbar { display:none; }
.channel-nav { display:flex; gap:24px; white-space:nowrap; }
.channel-link { position:relative; display:inline-flex; align-items:center; height:44px; font-size:14px; color:var(--text-secondary); transition:color .2s ease; }
.channel-link:hover { color:var(--accent); }
.channel-link.active { color:#fff; font-weight:600; }
.channel-link.active::after { content:''; position:absolute; bottom:0; left:0; right:0; height:2px; background:var(--accent); border-radius:2px 2px 0 0; }
@media (max-width:767px) { .channel-nav { gap:16px; } }

.btn-glow { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 24px; border-radius:var(--radius-lg); background:linear-gradient(135deg,#20E3FF,#0BB6D9); color:#0A1E3C; font-weight:700; font-size:15px; border:none; cursor:pointer; box-shadow:var(--shadow-glow); transition:box-shadow .2s ease, transform .2s ease; }
.btn-glow:hover { transform:translateY(-1px); box-shadow:0 0 28px rgba(32,227,255,0.6), 0 6px 20px rgba(32,227,255,0.3); }
.btn-glow:focus-visible { outline:3px solid rgba(32,227,255,0.5); outline-offset:2px; }
.btn-glow.btn-sm { padding:8px 16px; font-size:14px; border-radius:10px; }
.btn-ghost { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 24px; border-radius:var(--radius-lg); background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.15); color:#fff; font-weight:600; font-size:15px; transition:background .2s ease, border-color .2s ease; }
.btn-ghost:hover { background:rgba(255,255,255,0.12); border-color:rgba(255,255,255,0.25); }

.section { padding:64px 0; }
@media (min-width:768px) { .section { padding:96px 0; } }
.light-section { background:var(--light-bg); color:var(--light-text); }
.dark-section { background:var(--deep); }
.section-title { font-weight:800; font-size:28px; line-height:1.2; letter-spacing:-0.02em; }
@media (min-width:768px) { .section-title { font-size:36px; } }
.section-desc { margin-top:12px; font-size:15px; color:var(--text-secondary); max-width:640px; }
.light-section .section-desc { color:var(--light-secondary); }

.hero { padding:140px 0 72px; position:relative; overflow:hidden; background:var(--deep); }
.hero-glow-right { position:absolute; top:-12%; right:-8%; width:60%; height:150%; background:radial-gradient(circle at 70% 30%, rgba(32,227,255,0.16), transparent 60%); pointer-events:none; }
.hero-glow-left { position:absolute; bottom:-20%; left:0; width:50%; height:90%; background:radial-gradient(circle, rgba(123,108,255,0.12), transparent 60%); pointer-events:none; }
.hero-grid-texture { position:absolute; inset:0; background-image:linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px); background-size:48px 48px; -webkit-mask-image:linear-gradient(to bottom, rgba(0,0,0,0.6), transparent 90%); mask-image:linear-gradient(to bottom, rgba(0,0,0,0.6), transparent 90%); pointer-events:none; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; padding:6px 14px; border-radius:var(--radius-full); border:1px solid rgba(32,227,255,0.4); background:rgba(32,227,255,0.08); color:var(--accent); font-size:12px; font-weight:600; letter-spacing:0.04em; }
.hero-title { margin-top:20px; font-size:44px; font-weight:800; line-height:1.15; letter-spacing:-0.02em; color:#fff; }
@media (min-width:768px) { .hero-title { font-size:56px; } }
@media (min-width:1024px) { .hero-title { font-size:64px; } }
.hero-subtitle { margin-top:20px; max-width:600px; font-size:16px; line-height:1.8; color:var(--text-secondary); }
@media (min-width:768px) { .hero-subtitle { font-size:18px; } }
.hero-card { position:relative; border-radius:20px; overflow:hidden; box-shadow:0 24px 60px rgba(0,0,0,0.45); }
.hero-card::after { content:''; position:absolute; inset:0; background:linear-gradient(145deg, rgba(32,227,255,0.14), transparent 55%); pointer-events:none; }
.hero-card img { width:100%; height:100%; min-height:280px; object-fit:cover; }
.hero-trust { display:flex; flex-wrap:wrap; gap:20px; color:var(--text-secondary); font-size:13px; }
@media (max-width:767px) { .hero { padding:120px 0 56px; } }

.product-panel { display:grid; gap:36px; align-items:center; }
@media (min-width:1024px) { .product-panel { grid-template-columns:1fr 1fr; gap:60px; } }
.product-img { border-radius:20px; box-shadow:0 16px 40px rgba(0,0,0,0.08); border:1px solid #E2E9F1; overflow:hidden; background:#fff; }
.product-img img { width:100%; height:100%; min-height:260px; object-fit:cover; }
.dark-section .product-img { box-shadow:0 16px 40px rgba(0,0,0,0.35); border-color:rgba(255,255,255,0.12); }
.product-tag { display:inline-flex; align-items:center; gap:8px; padding:5px 12px; border-radius:var(--radius-full); font-size:12px; font-weight:600; }
.tag-light { background:rgba(6,184,217,0.1); color:#06B8D9; border:1px solid rgba(6,184,217,0.2); }
.tag-dark { background:rgba(32,227,255,0.08); color:var(--accent); border:1px solid rgba(32,227,255,0.35); }
.product-name { margin-top:16px; font-size:24px; font-weight:800; letter-spacing:-0.02em; line-height:1.3; color:inherit; }
@media (min-width:768px) { .product-name { font-size:32px; } }
.product-desc { margin-top:16px; font-size:15px; line-height:1.8; }
.product-list { margin-top:20px; display:grid; gap:12px; }
.product-list li { display:flex; gap:10px; align-items:flex-start; font-size:14px; }
.product-list li svg { flex-shrink:0; margin-top:4px; color:var(--accent); }
.light-section .product-list li svg { color:#06B8D9; }

.data-band { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
@media (min-width:768px) { .data-band { grid-template-columns:repeat(4,1fr); gap:24px; } }
.data-item { padding:28px 20px; border-radius:16px; background:rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.08); text-align:center; transition:border-color .2s ease, transform .2s ease; }
.data-item:hover { border-color:rgba(32,227,255,0.35); transform:translateY(-3px); }
.data-number { font-size:36px; font-weight:800; line-height:1.2; color:var(--accent); letter-spacing:-0.02em; }
.data-label { margin-top:8px; font-size:13px; color:var(--text-secondary); }

.scenario-card { padding:28px; border-radius:16px; background:#fff; border:1px solid #E2E9F1; box-shadow:0 4px 20px rgba(0,0,0,0.04); transition:transform .2s ease, box-shadow .2s ease; }
.scenario-card:hover { transform:translateY(-4px); box-shadow:0 14px 34px rgba(0,0,0,0.08); }
.scenario-icon { display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:12px; background:rgba(6,184,217,0.1); color:#06B8D9; }
.scenario-card h3 { margin-top:16px; font-size:18px; font-weight:700; color:var(--light-text); }
.scenario-card p { margin-top:10px; font-size:14px; color:var(--light-secondary); line-height:1.7; }

.step-card { padding:28px 24px; border-radius:16px; background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.12); backdrop-filter:blur(8px); transition:transform .2s ease, border-color .2s ease; }
.step-card:hover { transform:translateY(-4px); border-color:rgba(255,255,255,0.22); }
.step-number { font-size:44px; font-weight:800; line-height:1; -webkit-text-stroke:1px rgba(255,255,255,0.35); color:transparent; }
.step-icon { display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:12px; background:rgba(32,227,255,0.1); color:var(--accent); margin-top:20px; }
.step-card h3 { margin-top:14px; font-size:18px; font-weight:700; color:#fff; }
.step-card p { margin-top:10px; font-size:14px; color:var(--text-secondary); line-height:1.7; }

.faq-grid { display:grid; gap:16px; }
@media (min-width:1024px) { .faq-grid { grid-template-columns:1fr 1fr; gap:20px; } }
.faq-item { border-radius:16px; background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.10); overflow:hidden; transition:border-color .2s ease; }
.faq-item.open { border-color:rgba(32,227,255,0.35); }
.faq-question { display:flex; justify-content:space-between; align-items:center; gap:16px; padding:20px 24px; cursor:pointer; font-weight:600; font-size:15px; color:#fff; user-select:none; }
.faq-icon { width:18px; height:18px; position:relative; flex-shrink:0; transition:transform .3s ease; }
.faq-icon::before, .faq-icon::after { content:''; position:absolute; background:var(--accent); border-radius:2px; }
.faq-icon::before { top:8px; left:0; right:0; height:2px; }
.faq-icon::after { left:8px; top:0; bottom:0; width:2px; }
.faq-item.open .faq-icon { transform:rotate(45deg); }
.faq-answer { max-height:0; overflow:hidden; transition:max-height .3s ease; }
.faq-answer-inner { padding:0 24px 20px; color:var(--text-secondary); font-size:14px; line-height:1.8; }

.cta-band { position:relative; overflow:hidden; background:var(--deep); }
.cta-band::before { content:''; position:absolute; top:0; right:0; width:55%; height:100%; background:radial-gradient(circle at 80% 30%, rgba(32,227,255,0.16), transparent 60%); pointer-events:none; }
.input-dark { width:100%; padding:12px 16px; border-radius:12px; background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.16); color:#fff; font-size:14px; color-scheme:dark; transition:border-color .2s ease, box-shadow .2s ease; }
.input-dark::placeholder { color:rgba(255,255,255,0.35); }
.input-dark:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(32,227,255,0.2); }

.footer-link { color:var(--text-secondary); font-size:14px; transition:color .2s ease; }
.footer-link:hover { color:var(--accent); }
.qr-placeholder { width:96px; height:96px; border-radius:12px; border:1px solid rgba(255,255,255,0.15); background:rgba(255,255,255,0.04); display:flex; align-items:center; justify-content:center; color:rgba(255,255,255,0.4); font-size:12px; }
.divider-white { height:1px; background:rgba(255,255,255,0.08); }