/* roulang page: index */
:root {
  --bg-deep: #0A1128;
  --bg-sections: #0D1530;
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-highlight: rgba(255, 255, 255, 0.18);
  --primary: #1266FF;
  --primary-light: #4D8FFF;
  --accent-cyan: #00E0FF;
  --success: #2DD4BF;
  --warn: #FFC555;
  --text-main: #F1F5FF;
  --text-sub: #A9B7D4;
  --text-mute: #6C7A99;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 24px rgba(18, 102, 255, 0.45);
  --grid-line: rgba(255, 255, 255, 0.04);
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Heiti SC", "Inter", "Segoe UI", system-ui, sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

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

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--accent-cyan);
  outline: none;
}

button,
input {
  font-family: inherit;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(10, 17, 40, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-main);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.logo svg {
  width: 28px;
  height: 28px;
  stroke: var(--accent-cyan);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
}

.nav-links a {
  display: block;
  font-size: 15px;
  color: var(--text-sub);
  padding: 8px 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--text-main);
}

.nav-links a.active {
  color: var(--text-main);
}

.nav-links a.active::after {
  content: "";
  display: block;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-sub);
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.25);
  padding: 4px 12px;
  border-radius: 100px;
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(45, 212, 191, 0.7);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover,
.btn-primary:focus {
  filter: brightness(1.1);
  box-shadow: 0 0 32px rgba(18, 102, 255, 0.6);
  transform: translateY(-1px);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 12px rgba(18, 102, 255, 0.3);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-highlight);
  color: var(--text-main);
}

.btn-ghost:hover,
.btn-ghost:focus {
  background: rgba(77, 143, 255, 0.1);
  border-color: var(--primary-light);
  color: var(--text-main);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 160px 0 100px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
}

.hero::before {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 224, 255, 0.15) 0%, transparent 70%);
  top: -80px;
  left: -60px;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18, 102, 255, 0.2) 0%, transparent 70%);
  bottom: 20px;
  right: -40px;
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.hero-content h1 {
  font-size: 52px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.01em;
  background: linear-gradient(135deg, #ffffff 0%, #d6e4ff 60%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 36px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: var(--text-sub);
  font-size: 14px;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-tags span::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--primary-light);
}

/* Sections */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-sections);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-head p {
  color: var(--text-sub);
  font-size: 16px;
}

/* Pain Cards */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.pain-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.pain-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}

.pain-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.pain-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(18, 102, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.pain-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent-cyan);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.pain-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.pain-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* Solution */
.solution-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.solution-img {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--bg-sections);
  min-height: 340px;
}

.solution-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.solution-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 17, 40, 0.1) 0%, rgba(10, 17, 40, 0.6) 100%);
}

.solution-content .label {
  display: inline-block;
  font-size: 14px;
  color: var(--accent-cyan);
  background: rgba(0, 224, 255, 0.1);
  border: 1px solid rgba(0, 224, 255, 0.2);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.solution-content h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
}

.step-list {
  list-style: none;
  margin: 0 0 28px;
}

.step-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 0;
  font-size: 16px;
  color: var(--text-sub);
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}

.stat-num {
  font-size: 48px;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 15px;
  color: var(--text-sub);
}

.stat-mark {
  font-size: 12px;
  color: var(--text-mute);
  margin-top: 8px;
}

/* Testimonials */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-meta .name {
  font-weight: 600;
  font-size: 15px;
}

.testimonial-meta .role {
  font-size: 13px;
  color: var(--text-mute);
}

.testimonial-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  flex-grow: 1;
}

.stars {
  display: flex;
  gap: 2px;
  margin-top: 12px;
  color: var(--warn);
  font-size: 14px;
  letter-spacing: 2px;
}

/* News List */
.news-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.news-item {
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease;
}

.news-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.news-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.news-cat {
  font-size: 12px;
  color: var(--primary-light);
  background: rgba(77, 143, 255, 0.15);
  padding: 2px 10px;
  border-radius: 4px;
  white-space: nowrap;
}

.news-time {
  font-size: 13px;
  color: var(--text-mute);
}

.news-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-item p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  margin-top: 12px;
  font-size: 14px;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.news-empty {
  grid-column: 1 / -1;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-sub);
  font-size: 14px;
  background: transparent;
}

/* FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 0;
  margin-bottom: 16px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
}

.faq-item .faq-q {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  user-select: none;
}

.faq-item .faq-q::after {
  content: "+";
  margin-left: auto;
  font-size: 22px;
  font-weight: 400;
  color: var(--primary-light);
  transition: transform 0.3s ease;
}

.faq-item.is-active .faq-q::after {
  transform: rotate(45deg);
}

.faq-q span.q-mark {
  color: var(--primary);
  font-weight: 700;
}

.faq-a {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
  border-top: 1px solid var(--grid-line);
  margin-top: 0;
  padding-top: 16px;
}

.faq-item.is-active .faq-a {
  display: block;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(18, 102, 255, 0.18) 0%, transparent 70%);
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 34px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-sub);
  font-size: 16px;
  max-width: 540px;
  margin: 0 auto 32px;
}

.cta-note {
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 16px;
}

/* Footer */
.footer {
  background: var(--bg-sections);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 30px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--text-main);
}

.footer-logo svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent-cyan);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}

.footer p.desc {
  font-size: 13px;
  color: var(--text-mute);
  max-width: 260px;
}

.footer h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-sub);
}

.footer-links a:hover,
.footer-links a:focus {
  color: var(--accent-cyan);
}

.footer-disclaimer {
  font-size: 12px;
  color: var(--text-mute);
  line-height: 1.6;
  border-left: 2px solid var(--glass-border);
  padding-left: 16px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-mute);
}

/* Mobile Menu */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
}

.mobile-toggle span,
.mobile-toggle span::before,
.mobile-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.mobile-toggle span {
  position: relative;
}

.mobile-toggle span::before,
.mobile-toggle span::after {
  position: absolute;
  left: 0;
}

.mobile-toggle span::before {
  top: -6px;
}

.mobile-toggle span::after {
  top: 6px;
}

@media (max-width: 1024px) {
  .nav-links a {
    font-size: 14px;
  }
  .solution-wrap,
  .pain-grid,
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 17, 40, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
    display: none;
    z-index: 99;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 12px 0;
    font-size: 16px;
  }
  .nav-links a.active::after {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .status-badge {
    display: none;
  }
  .hero {
    padding-top: 130px;
    padding-bottom: 80px;
  }
  .hero-content h1 {
    font-size: 34px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .news-list,
  .solution-wrap,
  .pain-grid,
  .testimonial-grid,
  .stats-row {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 64px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .stat-num {
    font-size: 36px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-btns {
    flex-direction: column;
  }
  .hero-tags {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .btn {
    width: 100%;
  }
  .solution-img {
    min-height: 220px;
  }
}

@media (min-width: 769px) {
  .mobile-toggle {
    display: none !important;
  }
  .nav-links.open {
    display: flex !important;
  }
}

/* roulang page: category1 */
:root {
  --bg-deep: #0A1128;
  --bg-sections: #0D1530;
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-highlight: rgba(255, 255, 255, 0.18);
  --primary: #1266FF;
  --primary-light: #4D8FFF;
  --accent-cyan: #00E0FF;
  --success: #2DD4BF;
  --warn: #FFC555;
  --text-main: #F1F5FF;
  --text-sub: #A9B7D4;
  --text-mute: #6C7A99;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 24px rgba(18, 102, 255, 0.45);
  --grid-line: rgba(255, 255, 255, 0.04);
  --max-width: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Heiti SC", Inter, "Segoe UI", system-ui, sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent-cyan); }
ul, ol { list-style: none; }
button, input { font-family: inherit; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .22s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { background: linear-gradient(135deg, #2b7bff, #3ae8ff); color: #fff; box-shadow: 0 0 32px rgba(18, 102, 255, 0.6); transform: translateY(-2px); }
.btn-primary:active { transform: translateY(1px); box-shadow: 0 0 14px rgba(18, 102, 255, 0.3); }
.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text-main);
}
.btn-ghost:hover { background: rgba(77, 143, 255, 0.1); border-color: var(--primary-light); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 38px; font-size: 17px; border-radius: 12px; }

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(10, 17, 40, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { background: rgba(10, 17, 40, 0.92); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: #fff; letter-spacing: 0.01em; }
.logo svg { width: 30px; height: 30px; fill: rgba(255,255,255,0.12); stroke: var(--accent-cyan); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.logo:hover { color: var(--accent-cyan); }

.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  padding: 6px 2px;
  transition: color .2s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  border-radius: 2px;
  transition: width .25s ease;
}
.nav-links a:hover { color: var(--text-main); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: #fff; }

.header-actions { display: flex; align-items: center; gap: 14px; }
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--text-sub);
  background: rgba(45, 212, 191, 0.08);
  padding: 5px 12px;
  border-radius: 40px;
  border: 1px solid rgba(45, 212, 191, 0.15);
}
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 8px rgba(45, 212, 191, 0.8); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Page Hero ============ */
.page-hero {
  position: relative;
  padding: 180px 0 100px;
  background:
    radial-gradient(400px 300px at 20% 30%, rgba(0, 224, 255, 0.12), transparent 65%),
    radial-gradient(500px 340px at 85% 70%, rgba(18, 102, 255, 0.16), transparent 70%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    url('/assets/images/backpic/back-1.png') center 20% / cover no-repeat;
  background-size: 44px 44px, 44px 44px, auto;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10, 17, 40, 0.55);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--text-mute); margin-bottom: 22px; }
.breadcrumb a { color: var(--text-mute); }
.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb span { color: var(--text-main); }
.page-hero h1 {
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.25;
  background: linear-gradient(120deg, #fff 30%, var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 18px;
}
.hero-desc { font-size: 17px; color: var(--text-sub); max-width: 660px; line-height: 1.8; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ============ Section common ============ */
.section { padding: 90px 0; }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-header .tag { display: inline-block; font-size: 13px; color: var(--accent-cyan); background: rgba(0, 224, 255, 0.07); padding: 4px 14px; border-radius: 40px; border: 1px solid rgba(0, 224, 255, 0.2); margin-bottom: 14px; }
.section-header h2 { font-size: clamp(26px, 3.4vw, 34px); font-weight: 800; line-height: 1.35; color: #fff; }
.section-header p { color: var(--text-sub); margin-top: 12px; font-size: 16px; }

/* ============ Guide List ============ */
.guide-list { background: var(--bg-sections); }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.guide-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  padding: 24px;
  display: flex;
  gap: 18px;
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  overflow: hidden;
}
.guide-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}
.guide-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.2); box-shadow: 0 16px 40px rgba(0,0,0,0.5); }
.guide-thumb { width: 120px; height: 84px; flex-shrink: 0; border-radius: var(--radius-sm); object-fit: cover; background: #111a33; border: 1px solid rgba(255,255,255,0.06); }
.guide-card-body { flex: 1; min-width: 0; }
.guide-card-body h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.guide-card-body p { font-size: 14px; color: var(--text-sub); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 10px; }
.guide-tag { display: inline-block; font-size: 12px; color: var(--primary-light); background: rgba(77, 143, 255, 0.12); padding: 3px 10px; border-radius: 4px; }

/* ============ Scenarios ============ */
.scenarios { background: var(--bg-deep); }
.scenarios-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card {
  text-align: center;
  padding: 40px 30px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.scenario-card::before { content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 60%; height: 1px; background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent); }
.scenario-card:hover { transform: translateY(-5px); border-color: rgba(0, 224, 255, 0.25); box-shadow: 0 12px 36px rgba(0,0,0,0.4); }
.scenario-icon {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(18, 102, 255, 0.16), rgba(0, 224, 255, 0.08));
  border: 1px solid rgba(0, 224, 255, 0.18);
  font-size: 28px;
}
.scenario-card h3 { font-size: 19px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.scenario-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* ============ Timeline ============ */
.timeline-section { background: var(--bg-sections); position: relative; }
.timeline-wrap { max-width: 720px; margin: 0 auto; position: relative; }
.timeline-wrap::before { content: ""; position: absolute; left: 23px; top: 12px; bottom: 12px; width: 1px; background: linear-gradient(to bottom, rgba(0,224,255,0.5), rgba(18,102,255,0.2)); }
.timeline-item { position: relative; padding: 0 0 32px 72px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute; left: 12px; top: 6px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-sections);
  border: 2px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(18, 102, 255, 0.15), 0 0 12px rgba(18, 102, 255, 0.3);
}
.timeline-dot .inner { position: absolute; inset: 5px; border-radius: 50%; background: var(--accent-cyan); }
.timeline-item h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.timeline-item p { font-size: 15px; color: var(--text-sub); }

/* ============ Notice ============ */
.notice-section { background: var(--bg-deep); padding: 40px 0; }
.notice-card {
  display: flex; align-items: flex-start; gap: 16px;
  background: rgba(255, 197, 85, 0.06);
  border: 1px solid rgba(255, 197, 85, 0.22);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  color: #FFE8B8;
  font-size: 15px;
  line-height: 1.7;
}
.notice-card .fi { font-size: 22px; margin-top: 2px; color: var(--warn); }

/* ============ FAQ ============ */
.faq-section { background: var(--bg-sections); }
.faq-wrap { max-width: 780px; margin: 0 auto; }
.accordion { background: transparent !important; border: 0 !important; margin: 0 !important; }
.accordion-item {
  background: var(--glass-bg) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  margin-bottom: 14px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color .2s ease;
  overflow: hidden;
}
.accordion-item:hover { border-color: rgba(255,255,255,0.18) !important; }
.accordion-item.is-active { border-color: rgba(0,224,255,0.3) !important; }
.accordion-title {
  font-size: 16px !important;
  font-weight: 600 !important;
  color: var(--text-main) !important;
  padding: 18px 22px !important;
  line-height: 1.5;
  background: transparent !important;
  border: 0 !important;
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
}
.accordion-title .q { color: var(--accent-cyan); font-weight: 800; }
.accordion-title::before { content: "›"; position: absolute; right: 18px; font-size: 22px; color: var(--text-sub); transform: rotate(90deg); transition: transform .25s ease; }
.accordion-item.is-active .accordion-title::before { transform: rotate(-90deg); }
.accordion-content { background: transparent !important; border: 0 !important; color: var(--text-sub); font-size: 15px; line-height: 1.8; padding: 0 22px 20px 52px !important; }

/* ============ CTA ============ */
.cta-section { position: relative; padding: 100px 0; text-align: center; background: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px), radial-gradient(400px 260px at 50% 50%, rgba(0,224,255,0.12), transparent 70%), url('/assets/images/backpic/back-2.png') center / cover no-repeat; background-size: 44px 44px, 44px 44px, auto, cover; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(10, 17, 40, 0.68); }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; color: #fff; margin-bottom: 14px; }
.cta-section .cta-desc { color: var(--text-sub); font-size: 16px; margin-bottom: 32px; }
.cta-note { margin-top: 18px; font-size: 13px; color: var(--text-mute); }

/* ============ Footer ============ */
.footer { background: var(--bg-sections); border-top: 1px solid rgba(255, 255, 255, 0.06); padding: 60px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-logo svg { width: 26px; height: 26px; fill: rgba(255,255,255,0.1); stroke: var(--accent-cyan); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.footer .desc { font-size: 14px; color: var(--text-sub); line-height: 1.7; max-width: 300px; }
.footer h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 14px; color: var(--text-sub); transition: color .2s ease; }
.footer-links a:hover { color: var(--accent-cyan); }
.footer-disclaimer { font-size: 13px; color: var(--text-mute); line-height: 1.7; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 20px 0; text-align: center; font-size: 13px; color: var(--text-mute); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .header-actions .status-badge { display: none; }
  .guide-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(10, 17, 40, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    align-items: flex-start;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .3s ease, opacity .3s ease;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; }
  .nav-toggle { display: flex; }
  .page-hero { padding: 140px 0 70px; }
  .page-hero h1 { font-size: 32px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section { padding: 60px 0; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .guide-card { flex-direction: column; }
  .guide-thumb { width: 100%; height: 150px; }
  .timeline-wrap::before { left: 17px; }
  .timeline-item { padding-left: 52px; }
  .timeline-dot { left: 6px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .page-hero h1 { font-size: 27px; }
  .header-actions .btn-sm { display: none; }
  .guide-thumb { height: 120px; }
  .accordion-title { font-size: 15px !important; padding: 16px 16px !important; }
  .accordion-content { padding: 0 16px 18px 36px !important; }
  .cta-section h2 { font-size: 26px; }
}

/* roulang page: article */
:root {
  --bg-deep: #0A1128;
  --bg-sections: #0D1530;
  --glass-bg: rgba(255,255,255,0.045);
  --glass-border: rgba(255,255,255,0.09);
  --glass-highlight: rgba(255,255,255,0.18);
  --primary: #1266FF;
  --primary-light: #4D8FFF;
  --accent-cyan: #00E0FF;
  --success: #2DD4BF;
  --warn: #FFC555;
  --text-main: #F1F5FF;
  --text-sub: #A9B7D4;
  --text-mute: #6C7A99;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 24px rgba(18,102,255,0.45);
  --grid-line: rgba(255,255,255,0.04);
  --max-width: 1200px;
  --font-cn: "PingFang SC","Microsoft YaHei","Heiti SC",sans-serif;
  --font-en: Inter,"Segoe UI",system-ui;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-light); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-cyan); }
img { max-width: 100%; height: auto; display: inline-block; vertical-align: middle; }
ul, ol { list-style: none; padding: 0; margin: 0; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: 10px; font-size: 16px; font-weight: 600;
  font-family: var(--font-cn); border: 1px solid transparent; cursor: pointer;
  transition: all .25s ease; line-height: 1.4; text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #fff; box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  box-shadow: 0 0 36px rgba(0,224,255,0.55);
  transform: translateY(-1px); color: #fff; filter: brightness(1.08);
}
.btn-primary:active { transform: translateY(1px); box-shadow: 0 0 12px rgba(18,102,255,0.35); }
.btn-ghost {
  background: transparent; color: var(--text-main); border-color: rgba(255,255,255,0.25);
}
.btn-ghost:hover { background: rgba(77,143,255,0.1); border-color: var(--primary-light); color: var(--text-main); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 8px; }
.btn-large { padding: 16px 42px; font-size: 17px; border-radius: 14px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,17,40,0.72);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background .3s, box-shadow .3s;
}
.site-header.scrolled { background: rgba(10,17,40,0.9); box-shadow: 0 4px 30px rgba(0,0,0,0.35); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text-main); font-weight: 700; font-size: 20px; letter-spacing: 0.01em; }
.logo svg { width: 30px; height: 30px; fill: none; stroke: var(--accent-cyan); stroke-width: 1.8; }
.logo:hover { color: var(--text-main); }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--text-sub); font-size: 15px; font-weight: 500;
  padding: 8px 0 6px; position: relative; letter-spacing: 0.02em;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text-main); }
.nav-links a.active { color: var(--text-main); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 16px; }
.status-badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; color: var(--text-sub);
  background: rgba(45,212,191,0.08); border: 1px solid rgba(45,212,191,0.18);
  padding: 4px 14px; border-radius: 999px;
}
.status-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); box-shadow: 0 0 8px rgba(45,212,191,0.6); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: all .25s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 24px 0 20px; font-size: 13px; color: var(--text-mute);
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--text-mute); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb span { color: var(--text-main); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 260px; }

/* ===== Article Layout ===== */
.article-page { padding: 20px 0 60px; }
.article-main {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px 42px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.article-main::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}
.article-title {
  font-size: 36px; font-weight: 700; line-height: 1.35;
  color: var(--text-main); margin-bottom: 16px; letter-spacing: 0.01em;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  color: var(--text-mute); font-size: 13px; padding-bottom: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06); margin-bottom: 24px;
}
.article-meta .sep { color: var(--text-mute); }
.article-meta a { color: var(--text-sub); }
.article-meta a:hover { color: var(--primary-light); }
.article-excerpt {
  background: rgba(18,102,255,0.06);
  border-left: 3px solid var(--primary);
  border-radius: 0 10px 10px 0;
  padding: 18px 22px; margin-bottom: 28px;
  font-size: 16px; line-height: 1.9; color: var(--text-sub);
}
.article-body { font-size: 16px; color: var(--text-main); }
.article-body p { margin-bottom: 18px; }
.article-body h2 {
  font-size: 24px; font-weight: 700; margin: 36px 0 16px;
  padding-left: 14px; border-left: 4px solid var(--primary);
  line-height: 1.4; letter-spacing: 0.01em;
}
.article-body h3 {
  font-size: 20px; font-weight: 600; margin: 28px 0 12px;
  color: var(--text-main); letter-spacing: 0.01em;
}
.article-body img { border-radius: 12px; margin: 20px 0; box-shadow: var(--shadow-card); }
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(77,143,255,0.06);
  padding: 14px 22px; margin: 20px 0; border-radius: 0 10px 10px 0;
  color: var(--text-sub); font-style: normal;
}
.article-body ul, .article-body ol { margin: 16px 0; padding-left: 22px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body code {
  background: rgba(255,255,255,0.07); border-radius: 4px;
  padding: 2px 8px; font-size: 14px; color: var(--accent-cyan);
  font-family: var(--font-en);
}
.article-body pre {
  background: rgba(0,0,0,0.35); border: 1px solid var(--glass-border);
  border-radius: 10px; padding: 16px 20px; overflow-x: auto; margin: 20px 0;
  font-size: 14px; line-height: 1.6;
}
.article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.article-body th, .article-body td { border: 1px solid var(--glass-border); padding: 10px 14px; text-align: left; }
.article-body th { background: rgba(255,255,255,0.04); }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.06); }
.article-tags .tag {
  display: inline-block; background: rgba(77,143,255,0.1);
  color: var(--primary-light); border-radius: 6px;
  padding: 4px 12px; font-size: 13px; font-weight: 500;
}

/* ===== Sidebar ===== */
.sidebar { display: flex; flex-direction: column; gap: 22px; }
.sidebar .card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  position: relative; overflow: hidden;
}
.sidebar .card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}
.sidebar .card h3 {
  font-size: 18px; font-weight: 700; color: var(--text-main);
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.sidebar .card h3 i { color: var(--primary-light); font-size: 18px; }
.quick-card { text-align: center; }
.quick-card p { color: var(--text-sub); font-size: 14px; margin-bottom: 18px; }
.quick-card .btn { width: 100%; }
.toc-card ul li { margin-bottom: 8px; }
.toc-card ul a {
  color: var(--text-sub); font-size: 14px; display: block;
  padding: 4px 8px; border-radius: 6px; transition: all .2s;
  border-left: 2px solid transparent;
}
.toc-card ul a:hover { color: var(--text-main); background: rgba(77,143,255,0.08); border-left-color: var(--primary); }
.toc-card ul li.toc-h3 a { padding-left: 22px; font-size: 13px; }
.toc-empty, .empty-text { color: var(--text-mute); font-size: 14px; padding: 12px 0; text-align: center; }
.category-card ul li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,0.04);
}
.category-card ul li:last-child { border-bottom: none; }
.category-card ul a { color: var(--text-sub); font-size: 14px; }
.category-card ul a:hover { color: var(--text-main); }
.category-card ul .count {
  background: rgba(255,255,255,0.06); font-size: 12px;
  color: var(--text-mute); padding: 2px 10px; border-radius: 999px;
}

/* ===== Not Found ===== */
.not-found { text-align: center; padding: 80px 20px; }
.not-found i { font-size: 40px; color: var(--text-mute); margin-bottom: 16px; display: block; }
.not-found p { font-size: 20px; color: var(--text-sub); margin-bottom: 24px; }

/* ===== Related Section ===== */
.related-section {
  background: var(--bg-sections);
  padding: 60px 0 40px;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.related-section .container { padding-top: 0; }
.related-section h2 {
  font-size: 26px; font-weight: 700; margin-bottom: 28px;
  text-align: center; letter-spacing: 0.01em;
}
.related-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden; position: relative;
  transition: all .25s ease; height: 100%;
  display: flex; flex-direction: column;
}
.related-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}
.related-card:hover {
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.5);
}
.related-card img { width: 100%; height: 150px; object-fit: cover; display: block; }
.related-card .card-body { padding: 18px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.related-card .card-tag {
  align-self: flex-start; font-size: 12px; color: var(--primary-light);
  background: rgba(77,143,255,0.1); border-radius: 4px;
  padding: 2px 10px; margin-bottom: 10px;
}
.related-card h3 { font-size: 16px; font-weight: 600; line-height: 1.5; margin-bottom: 8px; }
.related-card h3 a { color: var(--text-main); transition: color .2s; }
.related-card h3 a:hover { color: var(--accent-cyan); }
.related-card .card-date { font-size: 13px; color: var(--text-mute); margin-top: auto; padding-top: 8px; }
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 32px; color: var(--text-sub); font-size: 15px;
  transition: color .2s;
}
.back-link:hover { color: var(--primary-light); }

/* ===== CTA Section ===== */
.cta-section {
  padding: 70px 0; position: relative; overflow: hidden;
  background:
    linear-gradient(rgba(10,17,40,0.82), rgba(10,17,40,0.9)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  text-align: center;
}
.cta-section::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  font-size: 32px; font-weight: 700; margin-bottom: 12px;
  letter-spacing: 0.01em; color: var(--text-main);
}
.cta-section p { color: var(--text-sub); font-size: 16px; margin-bottom: 24px; }
.cta-note { font-size: 12px !important; color: var(--text-mute) !important; margin-top: 14px !important; }

/* ===== Footer ===== */
.footer {
  background: var(--bg-sections);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 56px 0 0;
}
.footer-inner {
  display: grid; grid-template-columns: 1.3fr 0.8fr 1.1fr;
  gap: 40px; padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.footer-logo svg { width: 28px; height: 28px; fill: none; stroke: var(--accent-cyan); stroke-width: 1.8; }
.footer-logo:hover { color: var(--text-main); }
.footer .desc { color: var(--text-sub); font-size: 14px; line-height: 1.8; max-width: 320px; }
.footer h4 {
  font-size: 16px; font-weight: 700; color: var(--text-main);
  margin-bottom: 14px; letter-spacing: 0.02em;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  color: var(--text-sub); font-size: 14px; transition: color .2s;
}
.footer-links a:hover { color: var(--accent-cyan); }
.footer-disclaimer {
  color: var(--text-mute); font-size: 12px; line-height: 1.9;
  max-width: 320px;
}
.footer-bottom {
  padding: 20px 0; text-align: center;
  color: var(--text-mute); font-size: 13px;
  border-top: 1px solid rgba(255,255,255,0.04);
  margin-top: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .header-inner { height: 68px; }
  .nav-links { gap: 20px; }
  .status-badge { display: none; }
  .article-title { font-size: 32px; }
  .article-main { padding: 30px 26px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .hamburger { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: rgba(10,17,40,0.97);
    padding: 12px 24px; border-bottom: 1px solid rgba(255,255,255,0.05);
    box-shadow: 0 20px 30px rgba(0,0,0,0.4);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 16px; width: 100%;
  }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { color: var(--accent-cyan); }
  .header-actions .btn { display: none; }
  .article-page { padding: 0 0 40px; }
  .article-main { padding: 26px 20px; border-radius: var(--radius-md); }
  .article-title { font-size: 26px; }
  .sidebar { margin-top: 28px; }
  .cta-section { padding: 50px 0; }
  .cta-section h2 { font-size: 24px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .related-section h2 { font-size: 22px; }
  .breadcrumb { font-size: 12px; padding: 16px 0; }
  .related-card img { height: 130px; }
}
@media (max-width: 520px) {
  .article-meta { flex-wrap: wrap; gap: 4px; }
  .article-title { font-size: 22px; }
  .article-body h2 { font-size: 20px; }
  .article-body { font-size: 15px; }
  .btn-large { padding: 14px 28px; font-size: 15px; }
  .cta-section h2 { font-size: 20px; }
  .breadcrumb span { max-width: 160px; }
}