/* roulang page: index */
:root {
  --color-base: #05070D;
  --color-panel: #0B101E;
  --color-brand: #00D4FF;
  --color-amber: #FFB224;
  --color-line: rgba(255, 255, 255, 0.10);
  --color-text-main: #E9F1FF;
  --color-text-sub: #A7B4D0;
  --color-text-weak: #6F7B96;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-img: 12px;
  --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 28px 52px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 212, 255, 0.08);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background: var(--color-base);
  color: var(--color-text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}
.wrap {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
@media (min-width: 768px) {
  .wrap {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}
@media (min-width: 1024px) {
  .wrap {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}
.section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}
@media (min-width: 768px) {
  .section {
    padding-top: 6rem;
    padding-bottom: 6rem;
  }
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-brand);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
h1, h2, h3, h4 {
  line-height: 1.25;
  color: var(--color-text-main);
}
h2 {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
h3 {
  font-size: 1.375rem;
  font-weight: 700;
}
.section-sub {
  color: var(--color-text-sub);
  margin-top: 0.5rem;
  max-width: 560px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 7, 13, 0.84);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-header .header-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
}
.logo-mark {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--color-brand);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.9);
  flex-shrink: 0;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .logo-text {
    font-size: 1.05rem;
  }
}
.header-entry {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.12);
  border: 1px solid rgba(0, 212, 255, 0.35);
  color: var(--color-text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}
.header-entry:hover {
  background: rgba(0, 212, 255, 0.2);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
  transform: translateY(-1px);
}
.channel-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 0.2rem 0;
}
.channel-nav .nav-link {
  position: relative;
  padding: 0.65rem 0;
  color: var(--color-text-sub);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.channel-nav .nav-link:hover {
  color: #ffffff;
}
.channel-nav .nav-link.active {
  color: #ffffff;
}
.channel-nav .nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 3px;
  border-radius: 999px 999px 0 0;
  background: var(--color-brand);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
}
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  color: var(--color-text-main);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: border-color 0.2s, background 0.2s;
}
.menu-toggle:hover {
  border-color: rgba(0, 212, 255, 0.4);
  background: rgba(0, 212, 255, 0.08);
}
@media (max-width: 1023.98px) {
  .channel-nav {
    display: none;
  }
  .channel-nav.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(5, 7, 13, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-top: none;
    padding: 0.75rem 1.5rem 1rem;
  }
  .channel-nav.open .nav-link {
    padding: 0.75rem 0;
    width: 100%;
  }
  .channel-nav.open .nav-link.active::after {
    height: 2px;
    bottom: 4px;
  }
}

/* Countdown bar */
.countdown-wrap {
  margin-top: 1rem;
}
.countdown-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid rgba(0, 212, 255, 0.22);
  border-radius: 999px;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.06);
}
.countdown-label {
  font-weight: 700;
  color: var(--color-text-main);
  white-space: nowrap;
  font-size: 0.92rem;
}
.countdown-time {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  font-weight: 800;
  color: var(--color-amber);
  letter-spacing: 0.05em;
  text-shadow: 0 0 18px rgba(255, 178, 36, 0.35);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
}
.countdown-link {
  color: var(--color-brand);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}
.countdown-link:hover {
  text-decoration: underline;
}
@media (max-width: 520px) {
  .countdown-bar {
    flex-wrap: wrap;
    justify-content: center;
    border-radius: 20px;
    padding: 0.9rem 1rem;
  }
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background-image: linear-gradient(90deg, rgba(5, 7, 13, 0.97), rgba(5, 7, 13, 0.82) 55%, rgba(5, 7, 13, 0.62)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  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: 32px 32px;
}
.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 3rem;
  padding-bottom: 4rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.1);
  border: 1px solid rgba(61, 220, 151, 0.3);
  color: #3DDC97;
  font-size: 0.8rem;
  font-weight: 700;
  width: fit-content;
  margin-bottom: 1.5rem;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #3DDC97;
  box-shadow: 0 0 8px rgba(61, 220, 151, 0.8);
}
.hero-title {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #ffffff;
  max-width: 720px;
}
.hero-subtitle {
  margin-top: 0.8rem;
  color: var(--color-text-sub);
  font-size: 1.1rem;
  max-width: 640px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.2rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.75rem;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.22), rgba(0, 212, 255, 0.12));
  border: 1px solid rgba(0, 212, 255, 0.6);
  color: var(--color-text-main);
  border-radius: var(--radius-btn);
  font-weight: 700;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.15), inset 0 0 12px rgba(0, 212, 255, 0.08);
  transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
}
.btn-primary:hover {
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.35);
  transform: translateY(-1px);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.3), rgba(0, 212, 255, 0.16));
  color: #ffffff;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-sub);
  font-weight: 600;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.btn-ghost:hover {
  border-color: rgba(0, 212, 255, 0.45);
  color: var(--color-text-main);
  background: rgba(0, 212, 255, 0.08);
}

/* Stats */
.stats-bar {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
  background: rgba(11, 16, 30, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  transition: border-color 0.2s, transform 0.2s;
}
.stat-item:hover {
  border-color: rgba(0, 212, 255, 0.28);
  transform: translateY(-2px);
}
.stat-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-brand);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.stat-item span {
  display: block;
  margin-top: 0.35rem;
  color: var(--color-text-sub);
  font-size: 0.9rem;
}

/* Feature cards */
.feature-card {
  position: relative;
  overflow: hidden;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: var(--shadow-card-hover);
}
.feature-number {
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0, 212, 255, 0.25);
  line-height: 1;
  transition: color 0.2s;
}
.feature-card:hover .feature-number {
  color: rgba(0, 212, 255, 0.8);
}
.feature-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  margin-top: 1.1rem;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.18);
  color: var(--color-brand);
}
.feature-card h3 {
  margin-top: 1rem;
  font-size: 1.2rem;
  font-weight: 700;
}
.feature-card p {
  margin-top: 0.5rem;
  color: var(--color-text-sub);
  font-size: 0.925rem;
  line-height: 1.75;
}

/* Gallery */
.gallery-grid {
  grid-auto-flow: dense;
  margin-top: 2rem;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-img);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 0;
  background: rgba(11, 16, 30, 0.5);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 7, 13, 0.85) 0%, transparent 55%);
  pointer-events: none;
  transition: background 0.3s;
}
.gallery-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  color: var(--color-text-main);
  padding: 1rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  transform: translateY(4px);
  opacity: 0.95;
  transition: transform 0.3s, opacity 0.3s;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-item:hover::after {
  background: linear-gradient(to top, rgba(5, 7, 13, 0.96) 0%, transparent 60%);
}
.gallery-item:hover figcaption {
  transform: translateY(0);
}

/* CTA panel */
.cta-panel {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  padding: 3rem;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
}
.cta-glow {
  position: absolute;
  width: 480px;
  height: 480px;
  left: -160px;
  top: -160px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
  pointer-events: none;
}
.btn-amber {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0.9rem 2.2rem;
  background: var(--color-amber);
  color: #0A0F1C;
  border-radius: 14px;
  font-weight: 800;
  font-size: 1rem;
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}
.btn-amber:hover {
  background: #FFC64D;
  box-shadow: 0 0 32px rgba(255, 178, 36, 0.45);
  transform: translateY(-2px);
}
@media (max-width: 640px) {
  .cta-panel {
    padding: 2rem 1.5rem;
  }
  .btn-amber {
    width: 100%;
  }
}

/* FAQ */
.faq-item {
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s;
}
.faq-item:hover {
  border-color: rgba(0, 212, 255, 0.2);
}
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--color-text-main);
  font-weight: 600;
  font-size: 1rem;
  text-align: left;
  min-height: 56px;
  transition: background 0.2s;
}
.faq-question:hover {
  background: rgba(255, 255, 255, 0.03);
}
.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-brand);
  font-size: 1.25rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.25s ease, border-color 0.25s, box-shadow 0.25s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  border-color: var(--color-brand);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.25);
}
.faq-answer {
  display: none;
  padding: 0 1.5rem 1.35rem;
  color: var(--color-text-sub);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  display: block;
  animation: faqIn 0.28s ease;
}
@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.faq-sidebar {
  position: sticky;
  top: 140px;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}
.faq-sidebar h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}
.faq-sidebar ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.faq-sidebar li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  color: var(--color-text-sub);
  font-size: 0.9rem;
  line-height: 1.6;
}
.faq-sidebar li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-brand);
  margin-top: 0.5rem;
  flex-shrink: 0;
}

/* CMS list */
.cms-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
}
.cms-item {
  background: rgba(11, 16, 30, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  padding: 1.4rem 1.6rem;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.cms-item:hover {
  border-color: rgba(0, 212, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}
.cms-item:first-child {
  position: relative;
  overflow: hidden;
  padding: 2rem;
  border-color: rgba(0, 212, 255, 0.2);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(11, 16, 30, 0.7) 60%);
}
.cms-item:first-child::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  right: -80px;
  top: -80px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15), transparent 70%);
  pointer-events: none;
}
.cms-item:first-child .cms-title {
  font-size: 1.5rem;
}
.cms-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.12);
  color: var(--color-brand);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(0, 212, 255, 0.22);
}
.cms-time {
  color: var(--color-text-weak);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}
.cms-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
}
.cms-title a {
  color: var(--color-text-main);
}
.cms-title a:hover {
  color: var(--color-brand);
}
.cms-summary {
  margin-top: 0.5rem;
  color: var(--color-text-sub);
  font-size: 0.95rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cms-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1.5rem;
  background: rgba(11, 16, 30, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  color: var(--color-text-weak);
}
.cms-empty-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 1rem;
  color: var(--color-text-weak);
}
.cms-empty p {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  background: #04060B;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding-top: 3.5rem;
  padding-bottom: 3rem;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.2fr 0.8fr 1.2fr;
    gap: 2rem;
  }
}
.site-footer h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1rem;
}
.site-footer p,
.site-footer a {
  color: var(--color-text-sub);
  font-size: 0.9rem;
  line-height: 1.8;
}
.site-footer .footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.site-footer .footer-links a {
  width: fit-content;
}
.site-footer .footer-links a:hover {
  color: var(--color-brand);
}
.site-footer .footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 1.25rem 0;
  text-align: center;
  color: var(--color-text-weak);
  font-size: 0.85rem;
}

/* Misc */
.section-heading-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}
.text-link {
  color: var(--color-brand);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
}
.text-link:hover {
  text-decoration: underline;
}

/* roulang page: article */
:root {
  --bg-base: #05070D;
  --bg-panel: #0B101E;
  --brand: #00D4FF;
  --amber: #FFB224;
  --line: rgba(255,255,255,0.10);
  --text-main: #E9F1FF;
  --text-sub: #A7B4D0;
  --text-weak: #6F7B96;
  --success: #3DDC97;
  --error: #FF5A5F;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-img: 12px;
  --shadow-card: 0 20px 40px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(0,212,255,0.25);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 1360px) {
  .wrap { padding: 0 32px; }
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 7, 13, 0.85);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.brand-bar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 24px;
}
@media (min-width: 1360px) {
  .brand-bar { padding: 0 32px; }
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.4px;
  color: var(--text-main);
  transition: opacity 0.15s ease;
  white-space: nowrap;
}
.logo:hover { opacity: 0.9; }
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand) 0%, #007a9a 100%);
  display: inline-block;
  position: relative;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(0,212,255,0.25);
}
.logo-mark::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  border-radius: 5px;
  background: rgba(5,7,13,0.28);
}
.brand-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.search-box:focus-within {
  border-color: rgba(0,212,255,0.5);
  box-shadow: 0 0 12px rgba(0,212,255,0.12);
}
.search-box .search-icon { color: var(--text-weak); flex-shrink: 0; }
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-main);
  font-size: 0.8125rem;
  width: 140px;
  transition: width 0.2s ease;
}
.search-box input::placeholder { color: var(--text-weak); }
.search-box input:focus { width: 170px; }
.btn-enter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, var(--brand), #00a6c8);
  color: #05070D;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}
.btn-enter:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0,212,255,0.3);
}
.btn-enter:active {
  transform: translateY(0);
  box-shadow: none;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.05);
  color: var(--text-main);
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease;
}
.nav-toggle:hover { border-color: rgba(0,212,255,0.4); }
.nav-toggle svg { width: 20px; height: 20px; }

/* Channel Nav */
.channel-nav {
  border-top: 1px solid rgba(255,255,255,0.06);
  background: rgba(11, 16, 30, 0.92);
}
.nav-list {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 24px;
  height: 52px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-list::-webkit-scrollbar { display: none; }
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 0.9375rem;
  color: var(--text-sub);
  background: transparent;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
  border: 1px solid transparent;
}
.nav-link:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.05);
}
.nav-link.active {
  color: var(--brand);
  background: rgba(0,212,255,0.1);
  border-color: rgba(0,212,255,0.2);
  font-weight: 500;
}
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .search-box { display: none; }
  .channel-nav {
    display: none;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .channel-nav.open {
    display: block;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 49;
    background: rgba(5, 7, 13, 0.97);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  }
  .channel-nav.open .nav-list {
    flex-wrap: nowrap;
    height: auto;
    padding: 12px 16px;
    overflow-x: auto;
  }
  .channel-nav.open .nav-link {
    height: 44px;
    min-width: 88px;
    justify-content: center;
  }
}

/* ---- Article Main ---- */
.article-main {
  padding: 48px 0 80px;
  min-height: 70vh;
  background-image:
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(0,212,255,0.06), transparent 60%),
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-weak);
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { color: rgba(111,123,150,0.5); }
.breadcrumb .current {
  color: var(--text-weak);
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Article Header */
.article-header {
  max-width: 760px;
  margin: 0 auto 40px;
}
.article-title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.8125rem;
  color: var(--text-weak);
}
.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0,212,255,0.1);
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 500;
}
.meta-dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(111,123,150,0.6); }
.meta-time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-views {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* Article Body */
.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.75;
  color: #D7E1F5;
  word-break: break-word;
}
.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 56px;
  margin-bottom: 18px;
  color: var(--text-main);
  line-height: 1.3;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--text-main);
}
.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
  color: var(--text-main);
}
.article-body p {
  margin-bottom: 20px;
  line-height: 1.8;
}
.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 1.5rem;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}
.article-body li::marker { color: var(--brand); }
.article-body blockquote {
  border-left: 4px solid var(--brand);
  padding: 16px 24px;
  background: rgba(0,212,255,0.05);
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: var(--text-sub);
  font-style: normal;
}
.article-body blockquote p { margin-bottom: 0; }
.article-body img {
  border-radius: 12px;
  border: 1px solid var(--line);
  margin: 28px 0;
  width: 100%;
  height: auto;
}
.article-body a {
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.article-body a:hover {
  color: #66e4ff;
  border-bottom-color: rgba(0,212,255,0.4);
}
.article-body code {
  background: rgba(255,255,255,0.07);
  padding: 2px 8px;
  border-radius: 5px;
  font-family: "SF Mono", "Cascadia Code", Consolas, "PingFang SC", sans-serif;
  font-size: 0.875em;
  color: #b8e9ff;
}
.article-body pre {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 28px 0;
  line-height: 1.6;
}
.article-body pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 0.875rem;
  color: var(--text-sub);
}

/* Article Tools */
.article-tools {
  max-width: 760px;
  margin: 48px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 12px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  color: var(--text-sub);
  font-size: 0.875rem;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.back-link:hover {
  border-color: rgba(0,212,255,0.4);
  color: var(--brand);
  transform: translateX(-2px);
}
.tool-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-weak);
}

/* Related Section */
.related-section {
  max-width: 760px;
  margin: 56px auto 0;
  padding: 32px 0 0;
}
.related-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.related-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), transparent);
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.related-card {
  background: rgba(11,16,30,0.7);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,255,0.35);
  box-shadow: var(--shadow-glow);
}
.related-card .related-cover {
  height: 160px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(255,178,36,0.06));
}
.related-card .related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-card .related-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(5,7,13,0.6) 100%);
}
.related-card .related-info {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.related-card .related-info h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  transition: color 0.15s ease;
}
.related-card .related-info h3 a { display: block; }
.related-card:hover .related-info h3 a { color: var(--brand); }
.related-card .related-info p {
  font-size: 0.8125rem;
  color: var(--text-sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .related-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 8px;
  font-size: 0.75rem;
  color: var(--text-weak);
}
.related-card .related-meta .tag {
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(0,212,255,0.08);
  color: var(--brand);
  font-size: 0.7rem;
}
.related-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  font-size: 0.875rem;
  color: var(--text-sub);
  transition: color 0.15s ease, gap 0.15s ease;
}
.related-more:hover { color: var(--brand); gap: 12px; }

/* Article empty state */
.article-empty {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
}
.article-empty .empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
}
.article-empty h2 {
  font-size: 1.25rem;
  color: var(--text-main);
  margin-bottom: 12px;
}
.article-empty p {
  font-size: 0.9375rem;
  color: var(--text-weak);
  margin-bottom: 24px;
}
.article-empty .back-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  background: rgba(0,212,255,0.12);
  color: var(--brand);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s ease, transform 0.15s ease;
}
.article-empty .back-home:hover {
  background: rgba(0,212,255,0.18);
  transform: translateY(-2px);
}

/* ---- Footer ---- */
.site-footer {
  background: #03050A;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 56px 0 24px;
  margin-top: 88px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
}
.footer-brand .logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
}
.footer-grid p {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 320px;
}
.footer-grid h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-main);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--text-sub);
  transition: color 0.15s ease, padding-left 0.15s ease;
}
.footer-links a:hover {
  color: var(--brand);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  font-size: 0.8125rem;
  color: var(--text-weak);
  text-align: center;
}
.footer-bottom .domain-text { color: var(--text-weak); }

/* Responsive */
@media (max-width: 1023px) {
  .brand-bar { padding: 0 16px; height: 64px; }
  .channel-nav.open { top: 64px; }
  .brand-actions .btn-enter { display: inline-flex; }
  .wrap { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .article-main { padding: 36px 0 56px; }
  .article-title { font-size: clamp(1.5rem, 4vw, 2rem); }
}
@media (max-width: 640px) {
  .article-tools { flex-direction: column; align-items: flex-start; }
  .related-card .related-cover { height: 130px; }
  .breadcrumb { margin-bottom: 28px; }
  .article-body { font-size: 0.9375rem; }
  .site-footer { padding: 40px 0 20px; margin-top: 56px; }
  .brand-actions .btn-enter { padding: 0 14px; font-size: 0.8125rem; }
}

/* roulang page: category1 */
:root {
            --color-base: #05070D;
            --color-panel: #0B101E;
            --color-brand: #00D4FF;
            --color-amber: #FFB224;
            --color-line: rgba(255,255,255,0.10);
            --text-primary: #E9F1FF;
            --text-secondary: #A7B4D0;
            --text-muted: #6F7B96;
            --color-success: #3DDC97;
            --radius-card: 16px;
            --radius-img: 12px;
            --shadow-card: 0 20px 40px rgba(0,0,0,0.4);
            --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--color-base);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        :focus-visible {
            outline: 2px solid #00D4FF;
            outline-offset: 2px;
        }
        .wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .wrap {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .wrap {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 7, 13, 0.82);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #00D4FF, #0B101E);
            border: 1px solid rgba(0,212,255,0.4);
            position: relative;
            flex-shrink: 0;
        }
        .brand-mark::after {
            content: '';
            position: absolute;
            inset: 8px;
            border-radius: 6px;
            background: rgba(5,7,13,0.6);
            border: 1px solid rgba(0,212,255,0.5);
        }
        .brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            background: linear-gradient(90deg, #FFFFFF 0%, #00D4FF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--color-line);
            color: var(--text-secondary);
            background: rgba(255,255,255,0.03);
            transition: border-color .2s, color .2s;
        }
        .header-search:hover {
            border-color: rgba(0,212,255,0.4);
            color: var(--color-brand);
        }
        .header-btn {
            display: inline-flex;
            align-items: center;
            height: 40px;
            padding: 0 16px;
            border: 1px solid rgba(0,212,255,0.4);
            border-radius: 10px;
            color: var(--color-brand);
            font-size: 0.875rem;
            font-weight: 500;
            transition: all .2s;
            white-space: nowrap;
        }
        .header-btn:hover {
            background: rgba(0,212,255,0.1);
            box-shadow: 0 0 18px rgba(0,212,255,0.15);
        }
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--color-line);
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
        }
        .menu-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform .25s;
        }
        
        /* Channel nav */
        .channel-nav {
            border-top: 1px solid rgba(255,255,255,0.06);
            background: rgba(5,7,13,0.6);
        }
        .channel-nav-inner {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .channel-nav-inner::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 48px;
            padding: 0 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 10px;
            transition: color .2s, background .2s;
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.06);
        }
        .nav-link.active {
            color: var(--color-brand);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 4px;
            width: 20px;
            height: 3px;
            border-radius: 99px;
            background: var(--color-brand);
            box-shadow: 0 0 12px rgba(0,212,255,0.6);
        }
        @media (min-width: 768px) {
            .brand-text {
                font-size: 1.375rem;
            }
        }
        @media (max-width: 767px) {
            .header-search, .header-btn {
                display: none;
            }
        }
        @media (max-width: 991px) {
            .menu-toggle {
                display: flex;
            }
            .channel-nav {
                display: none;
                border-top: 1px solid rgba(255,255,255,0.06);
            }
            .channel-nav.open {
                display: block;
            }
            .channel-nav-inner {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 6px;
            }
            .nav-link {
                min-height: 46px;
            }
        }
        @media (min-width: 992px) {
            .menu-toggle {
                display: none !important;
            }
            .channel-nav {
                display: block;
            }
        }

        /* Category Hero */
        .cat-hero {
            position: relative;
            min-height: 260px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--color-base);
            border-bottom: 1px solid var(--color-line);
        }
        .cat-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }
        .cat-hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, #05070D 0%, rgba(5,7,13,0.72) 50%, rgba(5,7,13,0.2) 100%);
        }
        .cat-hero-grid {
            position: relative;
            z-index: 1;
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .cat-hero h1 {
            font-size: clamp(2.25rem, 5vw, 3rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .cat-hero p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
        }
        .cat-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(0,212,255,0.1);
            border: 1px solid rgba(0,212,255,0.25);
            color: var(--color-brand);
            font-size: 0.8125rem;
            font-weight: 500;
        }
        .cat-hero .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-brand);
            box-shadow: 0 0 8px var(--color-brand);
        }

        /* Category Main */
        .cat-main {
            padding: 56px 0 56px;
        }
        .cat-main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }
        @media (min-width: 992px) {
            .cat-main-grid {
                grid-template-columns: 2fr 1fr;
                gap: 40px;
            }
        }

        /* Guide cards */
        .cat-cards {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 640px) {
            .cat-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .guide-card {
            background: rgba(10, 15, 28, 0.72);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid rgba(255,255,255,0.10);
            border-radius: 16px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0,212,255,0.4);
            box-shadow: 0 24px 48px rgba(0,0,0,0.5), 0 0 40px rgba(0,212,255,0.06);
        }
        .card-img-link {
            display: block;
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 10;
            background: linear-gradient(135deg, #0B101E, #101A30);
        }
        .card-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .guide-card:hover .card-img {
            transform: scale(1.05);
        }
        .card-img-link::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(5,7,13,0.5) 100%);
        }
        .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 10px;
            gap: 8px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(0,212,255,0.12);
            border: 1px solid rgba(0,212,255,0.25);
            color: var(--color-brand);
            font-size: 0.75rem;
            font-weight: 500;
            white-space: nowrap;
        }
        .card-meta time {
            color: var(--text-muted);
            font-size: 0.75rem;
            white-space: nowrap;
            font-variant-numeric: tabular-nums;
        }
        .card-body h3 {
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .card-body h3 a {
            transition: color .2s;
        }
        .card-body h3 a:hover {
            color: var(--color-brand);
        }
        .card-body > p {
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.65;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-brand);
            font-size: 0.875rem;
            font-weight: 500;
            transition: gap .2s;
        }
        .card-link:hover {
            gap: 10px;
        }

        /* Sidebar */
        .cat-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .side-card {
            background: rgba(10,15,28,0.72);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid var(--color-line);
            border-radius: 16px;
            padding: 24px;
        }
        .side-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .side-card h3::before {
            content: '';
            width: 4px;
            height: 16px;
            border-radius: 4px;
            background: var(--color-brand);
            box-shadow: 0 0 10px rgba(0,212,255,0.5);
        }
        .side-card p {
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .side-links {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .side-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0;
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color .2s, padding-left .2s;
        }
        .side-links a:hover {
            color: var(--color-brand);
            padding-left: 4px;
        }
        .side-links a::before {
            content: '›';
            color: var(--color-brand);
            font-size: 1.2rem;
            line-height: 1;
        }
        .side-note {
            padding: 14px;
            border-radius: 12px;
            background: rgba(255,178,36,0.06);
            border: 1px solid rgba(255,178,36,0.2);
            color: var(--text-secondary);
            font-size: 0.8125rem;
            line-height: 1.65;
        }
        .side-note strong {
            color: var(--color-amber);
            font-weight: 600;
        }

        /* FAQ */
        .cat-faq {
            padding: 64px 0;
            background: linear-gradient(180deg, transparent 0%, rgba(11,16,30,0.4) 100%);
        }
        .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-title h2 {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .section-title p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: rgba(10,15,28,0.72);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid var(--color-line);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color .2s;
        }
        .faq-item.open {
            border-color: rgba(0,212,255,0.3);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1rem;
            font-weight: 500;
            text-align: left;
            transition: background .2s;
        }
        .faq-question:hover {
            background: rgba(255,255,255,0.04);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid var(--color-line);
            background: rgba(0,212,255,0.08);
            color: var(--color-brand);
            transition: transform .25s, background .25s;
            font-size: 1.1rem;
            font-weight: 600;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(0,212,255,0.18);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.75;
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 14px;
            margin: 0 22px 18px;
            padding-left: 0;
            padding-right: 0;
        }

        /* CTA */
        .cat-cta {
            padding: 16px 0 80px;
        }
        .cta-panel {
            position: relative;
            overflow: hidden;
            background: rgba(10,15,28,0.72);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border: 1px solid var(--color-line);
            border-radius: 20px;
            padding: 40px;
            display: flex;
            flex-direction: column;
            gap: 24px;
            align-items: flex-start;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0,212,255,0.18) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-panel::after {
            content: '';
            position: absolute;
            bottom: -50%;
            right: -5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,178,36,0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-text {
            position: relative;
            z-index: 1;
        }
        .cta-text h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cta-text p {
            color: var(--text-secondary);
            max-width: 420px;
        }
        .btn-amber {
            position: relative;
            z-index: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 56px;
            padding: 0 32px;
            background: #FFB224;
            color: #0A0F1C;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 14px;
            border: none;
            box-shadow: 0 0 30px rgba(255,178,36,0.35);
            transition: all .2s ease;
            white-space: nowrap;
        }
        .btn-amber:hover {
            background: #FFC04D;
            box-shadow: 0 0 40px rgba(255,178,36,0.5);
            transform: translateY(-2px);
        }
        .btn-amber:active {
            transform: translateY(0);
        }
        @media (min-width: 768px) {
            .cta-panel {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
                padding: 48px 56px;
            }
        }
        @media (max-width: 520px) {
            .cta-panel {
                padding: 32px 24px;
            }
            .btn-amber {
                width: 100%;
            }
        }

        /* Footer */
        .site-footer {
            background: #04060B;
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .logo-mark {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: linear-gradient(135deg, #00D4FF, #0B101E);
            border: 1px solid rgba(0,212,255,0.4);
            flex-shrink: 0;
        }
        .footer-brand .logo-text {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .site-footer p {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .site-footer h4 {
            color: var(--text-primary);
            font-size: 1rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.875rem;
            transition: color .2s;
        }
        .footer-links a:hover {
            color: var(--color-brand);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            margin-top: 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.8rem;
        }