/* roulang page: index */
:root {
  --bg-base: #070B14;
  --bg-deep: #04070D;
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-hover: rgba(255,255,255,0.08);
  --primary: #0EA5E9;
  --primary-deep: #0284C7;
  --accent: #22D3EE;
  --title-color: #F1F5F9;
  --body-color: #94A3B8;
  --muted-color: #64748B;
  --success: #34D399;
  --radius-lg: 24px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --shadow-card: inset 0 1px 0 rgba(255,255,255,0.06), 0 8px 32px rgba(0,0,0,0.35);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.5), 0 0 20px rgba(14,165,233,0.15);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-base);
  color: var(--body-color);
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; outline: none; }
.container { max-width: 1280px; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 768px) { .container { padding-left: 1.5rem; padding-right: 1.5rem; } }
.section { padding: 4rem 0; }
@media (min-width: 768px) { .section { padding: 6rem 0; } }
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  background: var(--glass-hover);
  box-shadow: var(--shadow-hover);
}
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0EA5E9, #06B6D4);
  box-shadow: 0 0 24px rgba(14,165,233,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
  border-radius: 12px;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  transition: all 0.3s ease;
  min-height: 44px;
}
.btn-glow:hover { filter: brightness(1.15); box-shadow: 0 0 36px rgba(14,165,233,0.5), inset 0 1px 0 rgba(255,255,255,0.25); }
.btn-glow:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-glow:active { transform: translateY(1px) scale(0.98); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.18);
  background: transparent;
  color: #CBD5E1;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 12px;
  padding: 0.75rem 1.5rem;
  transition: all 0.3s ease;
  min-height: 44px;
}
.btn-outline:hover { border-color: rgba(14,165,233,0.6); color: #fff; box-shadow: 0 0 16px rgba(14,165,233,0.15); background: rgba(14,165,233,0.05); }
.btn-outline:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.btn-outline:active { transform: translateY(1px) scale(0.98); }
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: rgba(34,211,238,0.1);
  border: 1px solid rgba(34,211,238,0.2);
}
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--title-color);
  letter-spacing: -0.02em;
  line-height: 1.3;
}
@media (min-width: 768px) { .section-title { font-size: 2rem; } }
.section-desc { font-size: 0.95rem; color: var(--body-color); max-width: 560px; }
.grid-bg {
  background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero-bg {
  background-image: linear-gradient(rgba(4,7,13,0.82), rgba(7,11,20,0.92)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
}
.hero-beam {
  position: absolute; top: -10%; left: -5%; width: 65%; height: 130%;
  background: linear-gradient(135deg, rgba(14,165,233,0.12), transparent 60%);
  pointer-events: none;
}
.scanline {
  position: absolute; left: 0; right: 0; height: 80px; top: -100px;
  background: linear-gradient(to bottom, transparent, rgba(34,211,238,0.03), transparent);
  animation: scanMove 9s linear infinite; pointer-events: none;
}
@keyframes scanMove {
  0% { transform: translateY(0); }
  100% { transform: translateY(calc(85vh + 100px)); }
}
.stat-divider { border-left: 1px solid rgba(255,255,255,0.08); }
.cta-glow-line { position: absolute; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, transparent, rgba(14,165,233,0.6), transparent); }
.cta-glow-line.top { top: 0; }
.cta-glow-line.bottom { bottom: 0; }
.cta-bg {
  background-image: linear-gradient(rgba(4,7,13,0.85), rgba(4,7,13,0.88)), url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.06); }
.faq-item:last-child { border-bottom: none; }
.faq-question { padding: 1.1rem 1.25rem; cursor: pointer; display: flex; align-items: center; gap: 0.75rem; font-weight: 500; color: var(--title-color); transition: color 0.2s; }
.faq-question:hover { color: var(--accent); }
.faq-question .icon { color: var(--primary); transition: transform 0.3s; flex-shrink: 0; }
.faq-item.active .faq-question .icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 1.25rem 1.1rem 2.5rem; color: var(--body-color); font-size: 0.9rem; }
.timeline-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 10px rgba(14,165,233,0.5); }
.header-nav {
  background: rgba(7,11,20,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: sticky; top: 0; z-index: 100;
}
.logo-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, #0EA5E9, #06B6D4);
  box-shadow: 0 0 12px rgba(14,165,233,0.7);
  animation: pulse 2.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 10px rgba(14,165,233,0.7); }
  50% { opacity: 0.6; box-shadow: 0 0 20px rgba(14,165,233,0.4); }
}
.nav-link { position: relative; padding: 0.5rem 0.25rem; font-size: 0.9rem; color: var(--body-color); transition: color 0.25s; white-space: nowrap; }
.nav-link:hover { color: #fff; }
.nav-link.active { color: #fff; font-weight: 600; }
.nav-link.active::after {
  content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%);
  width: 5px; height: 5px; border-radius: 50%; background: var(--primary);
  box-shadow: 0 0 8px rgba(14,165,233,0.8);
}
.search-input { width: 160px; transition: all 0.3s; border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.04); border-radius: 10px; padding: 0.45rem 1rem 0.45rem 2rem; font-size: 0.85rem; color: var(--title-color); }
.search-input:focus { width: 240px; border-color: rgba(14,165,233,0.5); background: rgba(255,255,255,0.06); box-shadow: 0 0 16px rgba(14,165,233,0.1); }
.search-input::placeholder { color: var(--muted-color); }
.footer-bg { background: var(--bg-deep); border-top: 1px solid rgba(255,255,255,0.06); }
.footer-link { color: var(--body-color); font-size: 0.88rem; transition: color 0.25s; }
.footer-link:hover { color: var(--accent); }
.focus-ring:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 6px; }
.mobile-menu { display: none; }
@media (max-width: 1024px) {
  .desktop-nav { display: none !important; }
  .desktop-actions { display: none !important; }
  .mobile-menu { display: flex; }
}
@media (max-width: 768px) {
  .section-title { font-size: 1.35rem; }
  .hero-min-h { min-height: auto; padding: 4.5rem 0 3rem; }
}
@media (max-width: 520px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
  .btn-glow, .btn-outline { width: 100%; }
}

/* roulang page: category1 */
:root {
    --bg-base: #070B14;
    --bg-deep: #04070D;
    --glass-bg: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.08);
    --glass-hover: rgba(255,255,255,0.08);
    --primary: #0EA5E9;
    --primary-deep: #0284C7;
    --accent: #22D3EE;
    --title-color: #F1F5F9;
    --body-color: #94A3B8;
    --muted-color: #64748B;
    --success: #34D399;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-base);
    color: var(--body-color);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; height: auto; display: block; }
  a { text-decoration: none; color: inherit; }
  button { border: none; background: none; cursor: pointer; font-family: inherit; }
  input { font-family: inherit; outline: none; }

  a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 8px;
  }

  .container {
    width: 100% !important;
    max-width: 1280px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-left: 24px !important;
    padding-right: 24px !important;
  }

  /* ===== 导航 ===== */
  .header-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(7,11,20,0.84);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .logo-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 12px rgba(14,165,233,0.8), 0 0 4px rgba(34,211,238,0.6);
    animation: pulse-dot 3s ease-in-out infinite;
    flex-shrink: 0;
  }
  @keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(0.85); }
  }
  .nav-link {
    position: relative;
    font-size: 0.95rem;
    color: var(--body-color);
    padding: 8px 2px;
    transition: color 0.25s;
    white-space: nowrap;
  }
  .nav-link:hover { color: #fff; }
  .nav-link.active { color: #fff; }
  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 50%; bottom: 0;
    transform: translateX(-50%);
    width: 20px; height: 5px;
    border-radius: 6px 6px 0 0;
    background: var(--primary);
    box-shadow: 0 0 10px rgba(14,165,233,0.7);
  }
  .search-input {
    width: 160px;
    height: 38px;
    padding: 0 12px 0 36px;
    font-size: 0.85rem;
    color: var(--title-color);
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    transition: all 0.3s;
  }
  .search-input::placeholder { color: var(--muted-color); }
  .search-input:focus {
    width: 230px;
    border-color: rgba(14,165,233,0.6);
    box-shadow: 0 0 0 3px rgba(14,165,233,0.12);
    background: rgba(255,255,255,0.07);
  }
  .mobile-menu { display: none; }

  /* ===== 按钮 ===== */
  .btn-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0EA5E9, #06B6D4);
    color: #fff;
    font-weight: 600;
    border-radius: 12px;
    padding: 0.6rem 1.25rem;
    box-shadow: 0 0 24px rgba(14,165,233,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
    transition: all 0.3s;
    min-height: 44px;
    white-space: nowrap;
  }
  .btn-glow:hover {
    filter: brightness(1.15);
    box-shadow: 0 0 36px rgba(14,165,233,0.5), inset 0 1px 0 rgba(255,255,255,0.3);
    transform: translateY(-1px);
  }
  .btn-glow:active { transform: translateY(0); filter: brightness(0.95); }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.18);
    color: #CBD5E1;
    font-weight: 500;
    border-radius: 12px;
    padding: 0.6rem 1.25rem;
    background: transparent;
    transition: all 0.3s;
    min-height: 44px;
    white-space: nowrap;
  }
  .btn-outline:hover {
    border-color: rgba(14,165,233,0.6);
    color: #fff;
    box-shadow: 0 0 20px rgba(14,165,233,0.15);
  }
  .btn-outline:active { transform: scale(0.98); }

  /* ===== 卡片 ===== */
  .glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 8px 32px rgba(0,0,0,0.35);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.5), 0 0 20px rgba(14,165,233,0.15);
  }

  /* ===== 页脚 ===== */
  .footer-bg {
    background: var(--bg-deep);
    border-top: 1px solid rgba(255,255,255,0.06);
  }
  .footer-link {
    color: var(--body-color);
    font-size: 0.9rem;
    transition: color 0.25s;
  }
  .footer-link:hover { color: #fff; }

  /* ===== 分类页横幅 ===== */
  .page-banner {
    padding: 170px 0 90px;
    background: linear-gradient(rgba(4,7,13,0.76), rgba(4,7,13,0.84)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    position: relative;
    overflow: hidden;
  }
  .page-banner::before {
    content: "";
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at 22% 45%, rgba(14,165,233,0.09), transparent 60%);
    pointer-events: none;
  }
  .page-banner::after {
    content: "";
    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: 44px 44px;
    pointer-events: none;
  }
  .banner-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(14,165,233,0.12);
    border: 1px solid rgba(14,165,233,0.3);
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 0.05em;
  }

  /* ===== 通用区段 ===== */
  .section-padding { padding: 84px 0; }
  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(14,165,233,0.08);
    border: 1px solid rgba(14,165,233,0.25);
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 0.05em;
  }
  .section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--title-color);
    letter-spacing: -0.02em;
    line-height: 1.3;
  }
  .section-desc {
    color: var(--body-color);
    font-size: 1rem;
    margin-top: 12px;
    max-width: 640px;
    line-height: 1.8;
  }
  @media (max-width: 768px) {
    .section-title { font-size: 1.6rem; }
    .section-padding { padding: 60px 0; }
  }

  /* ===== 图文交替 ===== */
  .split-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
  }
  .split-block.reverse .split-image { order: 2; }
  .split-image {
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.45), 0 0 30px rgba(14,165,233,0.08);
  }
  .split-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
  }
  .split-content .title-line {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--title-color);
    letter-spacing: -0.01em;
    line-height: 1.4;
    margin-bottom: 16px;
  }
  .split-content .desc {
    color: var(--body-color);
    font-size: 0.95rem;
    line-height: 1.85;
    margin-bottom: 20px;
  }
  .point-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .point-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--body-color);
    font-size: 0.92rem;
  }
  .point-list li svg {
    flex-shrink: 0;
    margin-top: 4px;
  }
  @media (max-width: 1024px) {
    .split-block { grid-template-columns: 1fr; gap: 36px; }
    .split-block.reverse .split-image { order: 0; }
  }

  /* ===== 背景纹理 ===== */
  .bg-grid {
    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: 44px 44px;
  }
  .bg-deep-section { background: rgba(4,7,13,0.6); }
  .bg-glow-accent { position: relative; overflow: hidden; }
  .bg-glow-accent::before {
    content: "";
    position: absolute; top: 0; left: 0;
    width: 60%; height: 100%;
    background: radial-gradient(ellipse at 20% 30%, rgba(14,165,233,0.08), transparent 60%);
    pointer-events: none;
  }

  /* ===== 数据卡 ===== */
  .stat-card { position: relative; padding: 32px 28px; height: 100%; }
  .stat-card.offset { transform: translateY(16px); }
  .stat-icon {
    width: 46px; height: 46px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(14,165,233,0.1);
    border: 1px solid rgba(14,165,233,0.28);
    color: var(--accent);
    margin-bottom: 18px;
    box-shadow: 0 0 16px rgba(14,165,233,0.08);
  }
  .stat-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--title-color);
    margin-bottom: 8px;
  }
  .stat-card p {
    font-size: 0.88rem;
    color: var(--body-color);
    line-height: 1.7;
  }
  @media (max-width: 768px) {
    .stat-card.offset { transform: none; }
  }

  /* ===== 流程 ===== */
  .workflow-step {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .step-num {
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(14,165,233,0.12);
    border: 1px solid rgba(14,165,233,0.35);
    color: var(--accent);
    border-radius: 10px;
    font-weight: 700;
    font-family: "DIN Alternate", "Roboto Mono", monospace;
    font-size: 0.95rem;
    box-shadow: 0 0 12px rgba(14,165,233,0.1);
  }
  .workflow-step h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--title-color);
  }
  .workflow-step p {
    font-size: 0.88rem;
    color: var(--body-color);
    line-height: 1.7;
  }

  /* ===== FAQ ===== */
  .faq-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 8px 32px rgba(0,0,0,0.35);
    padding: 8px 24px;
  }
  .faq-item { border-bottom: 1px solid rgba(255,255,255,0.06); }
  .faq-item:last-child { border-bottom: none; }
  .faq-question {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 0;
    color: var(--title-color);
    font-weight: 500;
    transition: color 0.25s;
    width: 100%;
    text-align: left;
    min-height: 48px;
  }
  .faq-question:hover { color: #fff; }
  .faq-icon {
    width: 28px; height: 28px;
    flex-shrink: 0;
    border-radius: 8px;
    background: rgba(14,165,233,0.1);
    border: 1px solid rgba(14,165,233,0.25);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent);
    transition: all 0.3s;
  }
  .faq-question:hover .faq-icon {
    background: rgba(14,165,233,0.2);
    box-shadow: 0 0 10px rgba(14,165,233,0.2);
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    padding: 0;
    color: var(--body-color);
    font-size: 0.9rem;
    line-height: 1.8;
  }
  .faq-item.open .faq-answer { max-height: 240px; padding: 0 0 18px 42px; }
  .faq-item.open .faq-icon { transform: rotate(45deg); }

  /* ===== CTA ===== */
  .cta-block {
    position: relative;
    border-radius: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    padding: 60px 48px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 20px 60px rgba(0,0,0,0.4);
  }
  .cta-block::before,
  .cta-block::after {
    content: "";
    position: absolute; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(14,165,233,0.8), rgba(34,211,238,0.8), transparent);
  }
  .cta-block::before { top: 0; }
  .cta-block::after { bottom: 0; }
  .cta-block .cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--title-color);
    letter-spacing: -0.02em;
    line-height: 1.35;
  }
  @media (max-width: 768px) {
    .cta-block { padding: 40px 24px; }
    .cta-block .cta-title { font-size: 1.5rem; }
  }

  /* ===== 响应式导航 ===== */
  @media (max-width: 1024px) {
    .desktop-nav, .desktop-actions { display: none !important; }
    .mobile-menu { display: flex; }
  }
  @media (min-width: 1025px) {
    .mobile-dropdown { display: none !important; }
  }

/* roulang page: article */
:root {
  --bg-base: #070B14;
  --bg-deep: #04070D;
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-hover: rgba(255,255,255,0.08);
  --primary: #0EA5E9;
  --primary-deep: #0284C7;
  --accent: #22D3EE;
  --title-color: #F1F5F9;
  --body-color: #94A3B8;
  --muted-color: #64748B;
  --success: #34D399;
  --radius-card: 20px;
  --radius-btn: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--body-color);
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  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: 64px 64px;
  pointer-events: none;
  z-index: 0;
}
body .container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
@media (min-width: 768px) {
  body .container { padding-left: 1.5rem; padding-right: 1.5rem; }
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
main, header, footer { position: relative; z-index: 1; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 8px;
}
.focus-ring:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 8px;
}

.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(7,11,20,0.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #0EA5E9, #22D3EE);
  box-shadow: 0 0 12px rgba(14,165,233,0.8);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}
.nav-link {
  position: relative;
  color: var(--body-color);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0.25rem;
  transition: color .2s;
  white-space: nowrap;
}
.nav-link:hover { color: #FFFFFF; }
.nav-link.active {
  color: var(--title-color);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  transform: translateX(-50%);
  width: 5px;
  height: 5px;
  border-radius: 9999px;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
}
.search-input {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 9999px;
  padding: 0.5rem 0.9rem 0.5rem 2.2rem;
  font-size: 0.85rem;
  color: var(--title-color);
  outline: none;
  transition: all .3s;
  width: 160px;
}
.search-input::placeholder { color: var(--muted-color); }
.search-input:focus {
  width: 240px;
  border-color: rgba(14,165,233,0.6);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #0EA5E9, #06B6D4);
  color: #FFFFFF;
  font-weight: 600;
  border-radius: 12px;
  padding: 0.6rem 1.3rem;
  box-shadow: 0 0 24px rgba(14,165,233,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
  transition: filter .2s, box-shadow .2s, transform .2s;
  cursor: pointer;
  border: none;
}
.btn-glow:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 36px rgba(14,165,233,0.5), inset 0 1px 0 rgba(255,255,255,0.25);
  transform: translateY(-1px);
}
.btn-glow:active { transform: scale(0.97); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid rgba(255,255,255,0.18);
  color: #CBD5E1;
  border-radius: 12px;
  padding: 0.6rem 1.3rem;
  font-weight: 500;
  background: transparent;
  transition: all .2s;
  cursor: pointer;
}
.btn-outline:hover {
  border-color: rgba(14,165,233,0.6);
  color: #FFFFFF;
  box-shadow: 0 0 20px rgba(14,165,233,0.15);
}
.btn-outline:active { transform: scale(0.97); }
.mobile-menu { display: none; }
.mobile-dropdown {
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(5,8,16,0.97);
  backdrop-filter: blur(20px);
}
@media (max-width: 767.98px) {
  .desktop-nav, .desktop-actions { display: none !important; }
  .mobile-menu { display: flex; }
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 8px 32px rgba(0,0,0,0.35);
  transition: all .3s;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5), 0 0 20px rgba(14,165,233,0.15);
  border-color: rgba(255,255,255,0.12);
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: 6px;
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(14,165,233,0.25);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.9rem;
  border-radius: 9999px;
  background: rgba(14,165,233,0.1);
  border: 1px solid rgba(14,165,233,0.2);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.footer-bg {
  background: var(--bg-deep);
}
.footer-link {
  color: var(--body-color);
  font-size: 0.9rem;
  transition: color .2s;
}
.footer-link:hover { color: var(--accent); }
.cta-glow {
  position: relative;
  overflow: hidden;
}
.cta-glow::before,
.cta-glow::after {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(14,165,233,0.8), rgba(34,211,238,0.8), transparent);
  pointer-events: none;
}
.cta-glow::before { top: 0; }
.cta-glow::after { bottom: 0; }

.article-body {
  color: var(--body-color);
  font-size: 1.05rem;
  line-height: 1.85;
}
.article-body h2 {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--title-color);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.article-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--title-color);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.article-body p { margin-bottom: 1.5rem; }
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(255,255,255,0.02);
  padding: 1.25rem 1.5rem;
  border-radius: 0 12px 12px 0;
  color: #CBD5E1;
  margin: 1.5rem 0;
}
.article-body ul,
.article-body ol {
  margin: 1.25rem 0 1.5rem;
  padding-left: 1.5rem;
}
.article-body li { margin-bottom: 0.5rem; }
.article-body img {
  border-radius: 16px;
  max-width: 100%;
  height: auto;
  margin: 1.5rem 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}
.article-body td,
.article-body th {
  border: 1px solid rgba(255,255,255,0.08);
  padding: 0.75rem 1rem;
}
.article-body th {
  color: var(--title-color);
  background: rgba(255,255,255,0.03);
}

/* roulang page: category2 */
:root {
    --bg-base: #070B14;
    --bg-deep: #04070D;
    --glass-bg: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.08);
    --glass-hover: rgba(255,255,255,0.08);
    --primary: #0EA5E9;
    --primary-deep: #0284C7;
    --accent: #22D3EE;
    --title-color: #F1F5F9;
    --body-color: #94A3B8;
    --muted-color: #64748B;
    --success: #34D399;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg-base);
    color: var(--body-color);
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    line-height: 1.75;
    overflow-x: hidden;
  }
  body::before {
    content: '';
    position: fixed;
    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: 60px 60px;
    pointer-events: none;
    z-index: 0;
  }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; height: auto; display: block; }
  .focus-ring:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 6px;
  }
  .header-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(7,11,20,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 12px rgba(14,165,233,0.8);
    animation: pulse-glow 2.4s ease-in-out infinite;
    display: inline-block;
    flex-shrink: 0;
  }
  @keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 8px rgba(14,165,233,0.6); }
    50% { box-shadow: 0 0 18px rgba(14,165,233,1), 0 0 30px rgba(34,211,238,0.4); }
  }
  .nav-link {
    position: relative;
    color: var(--body-color);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.25rem 0;
    transition: color 0.2s ease;
  }
  .nav-link:hover { color: #fff; }
  .nav-link.active { color: #fff; }
  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 10px rgba(14,165,233,0.8);
  }
  .search-input {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 0.45rem 0.9rem 0.45rem 2.2rem;
    font-size: 0.85rem;
    color: var(--title-color);
    width: 180px;
    transition: width 0.3s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
  }
  .search-input::placeholder { color: var(--muted-color); }
  .search-input:focus {
    width: 240px;
    border-color: rgba(14,165,233,0.6);
    box-shadow: 0 0 16px rgba(14,165,233,0.15);
  }
  .btn-glow {
    background: linear-gradient(135deg, #0EA5E9, #06B6D4);
    color: #fff;
    border-radius: 12px;
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    box-shadow: 0 0 24px rgba(14,165,233,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
    transition: filter 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
  }
  .btn-glow:hover {
    filter: brightness(1.15);
    box-shadow: 0 0 32px rgba(14,165,233,0.55), inset 0 1px 0 rgba(255,255,255,0.3);
    transform: translateY(-2px);
  }
  .btn-glow:active { transform: translateY(0) scale(0.97); }
  .btn-outline {
    border: 1px solid rgba(255,255,255,0.18);
    color: #CBD5E1;
    border-radius: 12px;
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    background: transparent;
    transition: border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    cursor: pointer;
  }
  .btn-outline:hover {
    border-color: rgba(14,165,233,0.6);
    color: #fff;
    box-shadow: 0 0 16px rgba(14,165,233,0.2);
    transform: translateY(-2px);
  }
  .btn-outline:active { transform: translateY(0) scale(0.97); }
  .glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 8px 32px rgba(0,0,0,0.35);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.5), 0 0 20px rgba(14,165,233,0.15);
  }
  .badge {
    display: inline-flex;
    align-items: center;
    background: rgba(34,211,238,0.15);
    color: var(--accent);
    border-radius: 6px;
    padding: 0.15rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
  }
  .tech-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(14,165,233,0.12);
    border: 1px solid rgba(14,165,233,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
  }
  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
  }
  .section-label::before {
    content: '';
    width: 24px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent));
  }
  .cate-hero {
    position: relative;
    padding: 140px 0 90px;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
  }
  .cate-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(4,7,13,0.9), rgba(4,7,13,0.75), rgba(14,165,233,0.15));
  }
  .cate-hero::after {
    content: '';
    position: absolute;
    left: -10%;
    top: -20%;
    width: 60%;
    height: 140%;
    background: linear-gradient(100deg, rgba(14,165,233,0.12), transparent);
    transform: skewX(-15deg);
    pointer-events: none;
  }
  .cate-hero .hero-content { position: relative; z-index: 2; }
  .stat-item {
    position: relative;
    padding: 0.75rem 1.5rem;
    border-left: 1px solid rgba(255,255,255,0.08);
  }
  .stat-item:first-child { border-left: none; }
  .stat-num {
    font-family: 'DIN Alternate', 'Roboto Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
  }
  .section-space { padding: 80px 0; }
  .faq-item { border-bottom: 1px solid rgba(255,255,255,0.06); }
  .faq-item:last-child { border-bottom: none; }
  .faq-question {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--title-color);
    transition: color 0.2s;
  }
  .faq-question:hover .faq-icon { color: var(--primary); }
  .faq-icon {
    color: var(--muted-color);
    flex-shrink: 0;
    transition: transform 0.3s, color 0.2s;
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    color: var(--body-color);
    font-size: 0.9rem;
    line-height: 1.75;
  }
  .faq-answer.open { max-height: 420px; }
  .faq-answer-inner { padding: 0 1.5rem 1.25rem; }
  .footer-bg { background: var(--bg-deep); position: relative; z-index: 1; }
  .footer-link {
    color: var(--body-color);
    font-size: 0.85rem;
    transition: color 0.2s, padding-left 0.2s;
  }
  .footer-link:hover { color: #fff; padding-left: 3px; }
  .mobile-dropdown { transition: opacity 0.3s ease; }
  .flow-step {
    position: relative;
    padding: 1.5rem;
  }
  .flow-step::after {
    content: '';
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 1px;
    background: linear-gradient(90deg, rgba(14,165,233,0.5), transparent);
  }
  .flow-step:last-child::after { display: none; }
  @media (max-width: 768px) {
    .desktop-nav { display: none; }
    .desktop-actions { display: none; }
    .mobile-menu { display: flex; }
    .cate-hero { padding: 110px 0 60px; }
    .stat-item { border-left: none; border-top: 1px solid rgba(255,255,255,0.06); padding: 0.75rem 0.5rem; }
    .section-space { padding: 56px 0; }
  }
  @media (min-width: 769px) {
    .mobile-menu { display: none; }
    .mobile-dropdown { display: none !important; }
  }
  .cta-glow-box {
    position: relative;
    background: rgba(255,255,255,0.03);
    border-radius: 24px;
    border: 1px solid rgba(14,165,233,0.2);
    overflow: hidden;
  }
  .cta-glow-box::before,
  .cta-glow-box::after {
    content: '';
    position: absolute;
    left: 50%;
    width: 80%;
    height: 2px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, rgba(14,165,233,0.6), transparent);
  }
  .cta-glow-box::before { top: 0; }
  .cta-glow-box::after { bottom: 0; }
  .cta-glow-box .beam-l,
  .cta-glow-box .beam-r {
    position: absolute;
    top: -60%;
    width: 25%;
    height: 220%;
    pointer-events: none;
    opacity: 0.12;
  }
  .cta-glow-box .beam-l {
    left: 15%;
    background: linear-gradient(100deg, transparent, rgba(14,165,233,0.5), transparent);
    transform: rotate(18deg);
  }
  .cta-glow-box .beam-r {
    right: 15%;
    background: linear-gradient(80deg, transparent, rgba(34,211,238,0.4), transparent);
    transform: rotate(-18deg);
  }