/* roulang page: index */
:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-dark: #172554;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg: #f8fafc;
  --surface: #ffffff;
  --dark: #0b1220;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
ul,
ol {
  list-style: none;
}
button,
input {
  font-family: inherit;
  font-size: 100%;
  border: none;
  outline: none;
  background: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(30, 58, 138, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 58, 138, 0.4);
}
.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--text);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
}
.btn-accent:hover {
  background: var(--accent-dark);
  color: #ffffff;
  transform: translateY(-2px);
}
.btn-small {
  padding: 8px 20px;
  font-size: 14px;
}
.section {
  padding: 88px 0;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  background: rgba(30, 58, 138, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 999px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
}
.header-placeholder {
  height: 80px;
}
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 20px;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 999px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 68px;
  gap: 16px;
}
.logo {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.3px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.08);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.12);
  font-weight: 600;
}
.nav-cta {
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: rgba(30, 58, 138, 0.06);
  flex-shrink: 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
  position: relative;
}
.nav-toggle span::before {
  position: absolute;
  top: -6px;
}
.nav-toggle span::after {
  position: absolute;
  top: 6px;
}
.nav-toggle.active span {
  background: transparent;
}
.nav-toggle.active span::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle.active span::after {
  top: 0;
  transform: rotate(-45deg);
}
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 140px 0 100px;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.88) 0%, rgba(11, 18, 32, 0.68) 50%, rgba(30, 58, 138, 0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.18);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stat {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 16px 24px;
  backdrop-filter: blur(8px);
}
.hero-stat strong {
  font-size: 24px;
  color: #fcd34d;
  display: block;
  font-weight: 700;
}
.hero-stat span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}
.features-section {
  background: var(--bg);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.3);
}
.feature-card:hover::after {
  transform: scaleX(1);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(59, 130, 246, 0.16));
  color: var(--primary);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.category-section {
  background: var(--surface);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: block;
  position: relative;
}
.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}
.category-card-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.category-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-card-cover img {
  transform: scale(1.06);
}
.category-card-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(11, 18, 32, 0.7) 100%);
}
.category-card-body {
  padding: 24px;
}
.category-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.category-card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.category-link::after {
  content: "→";
  transition: transform var(--transition);
}
.category-card:hover .category-link::after {
  transform: translateX(4px);
}
.latest-section {
  background: var(--bg);
}
.post-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  display: block;
  position: relative;
}
.post-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.3);
}
.post-tag {
  display: inline-block;
  background: rgba(30, 58, 138, 0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.post-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}
.post-card h3 a {
  color: var(--text);
}
.post-card h3 a:hover {
  color: var(--primary);
}
.post-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
}
.post-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  color: var(--text-muted);
}
.process-section {
  background: var(--surface);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}
.process-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.process-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.process-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #ffffff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(30, 58, 138, 0.3);
}
.process-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}
.process-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.hot-section {
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.hot-section::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.25);
  filter: blur(80px);
}
.hot-section .section-tag {
  background: rgba(245, 158, 11, 0.15);
  color: #fcd34d;
}
.hot-section .section-head h2 {
  color: #ffffff;
}
.hot-section .section-head p {
  color: rgba(255, 255, 255, 0.6);
}
.hot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
}
.hot-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(10px);
  transition: all var(--transition);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.hot-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.4);
}
.hot-rank {
  font-size: 32px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, #fcd34d, #f59e0b);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  flex-shrink: 0;
  min-width: 44px;
  text-align: center;
}
.hot-card h3 {
  color: #ffffff;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}
.hot-card p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  line-height: 1.6;
}
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item.open {
  box-shadow: var(--shadow);
  border-color: rgba(59, 130, 246, 0.3);
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: none;
  transition: color var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  position: relative;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 10px;
  left: 4px;
}
.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 4px;
  left: 10px;
}
.faq-item.open .faq-icon::after {
  transform: scaleY(0);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.cta-section {
  background: var(--surface);
}
.cta-box {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.92), rgba(30, 58, 138, 0.82));
}
.cta-box > * {
  position: relative;
  z-index: 1;
}
.cta-box h2 {
  font-size: 32px;
  color: #ffffff;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-box p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.site-footer {
  background: var(--dark);
  padding: 56px 0 24px;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand {
  max-width: 320px;
}
.footer-brand .logo {
  color: #ffffff;
  font-size: 20px;
  margin-bottom: 12px;
}
.footer-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  line-height: 1.7;
}
.footer-links {
  display: flex;
  gap: 40px;
}
.footer-links h4 {
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links ul li {
  margin-bottom: 10px;
}
.footer-links ul a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  transition: color var(--transition);
}
.footer-links ul a:hover {
  color: #fcd34d;
}
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 13px;
}
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  z-index: 99;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
}
.scroll-top.show {
  opacity: 1;
  visibility: visible;
}
.scroll-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hot-grid {
    grid-template-columns: 1fr;
    max-width: 680px;
  }
  .process-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .hero h1 {
    font-size: 42px;
  }
}
@media (max-width: 768px) {
  .site-header {
    top: 10px;
    padding: 0 12px;
  }
  .header-inner {
    height: 60px;
    padding: 0 14px;
    border-radius: 18px;
  }
  .logo {
    font-size: 16px;
  }
  .site-nav {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    gap: 2px;
  }
  .site-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav-link {
    padding: 14px 16px;
    text-align: center;
    border-radius: 12px;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero {
    min-height: 580px;
    padding: 120px 0 80px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero p {
    font-size: 16px;
  }
  .hero-stats {
    gap: 12px;
  }
  .hero-stat {
    padding: 12px 18px;
    flex: 1;
    min-width: 120px;
  }
  .hero-stat strong {
    font-size: 20px;
  }
  .section {
    padding: 64px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .post-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .post-card {
    padding: 22px;
  }
  .cta-box {
    padding: 48px 24px;
  }
  .cta-box h2 {
    font-size: 24px;
  }
  .footer-top {
    flex-direction: column;
    gap: 24px;
  }
  .footer-links {
    flex-wrap: wrap;
    gap: 24px;
  }
  .scroll-top {
    bottom: 20px;
    right: 20px;
  }
}
@media (max-width: 520px) {
  .hero h1 {
    font-size: 26px;
  }
  .hero p {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-stats {
    flex-direction: column;
  }
  .hero-stat {
    min-width: auto;
    text-align: center;
  }
  .section {
    padding: 48px 0;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .feature-card {
    padding: 24px;
  }
  .category-card-body {
    padding: 18px;
  }
  .post-card {
    padding: 18px;
  }
  .post-card h3 {
    font-size: 16px;
  }
  .process-card {
    padding: 28px 20px;
  }
  .cta-box {
    padding: 40px 18px;
    border-radius: 16px;
  }
  .cta-box h2 {
    font-size: 20px;
  }
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
  --primary: #e94560;
  --primary-dark: #c3374f;
  --primary-light: #ffe0e6;
  --secondary: #16213e;
  --secondary-light: #1a2b4a;
  --accent: #ffa726;
  --bg: #f7f8fc;
  --bg-dark: #0f1626;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 12px rgba(15, 22, 38, 0.06);
  --shadow-md: 0 8px 30px rgba(15, 22, 38, 0.1);
  --shadow-lg: 0 16px 48px rgba(15, 22, 38, 0.14);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-w: 1200px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

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

/* ===== 浮动 Dock 导航 ===== */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}

.header-inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: 1100px;
  height: 60px;
  padding: 0 28px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 8px 32px rgba(15, 22, 38, 0.12);
  transition: var(--transition);
}

.site-header .header-inner:hover {
  box-shadow: 0 12px 40px rgba(15, 22, 38, 0.18);
  background: rgba(255, 255, 255, 0.96);
}

.logo {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.5px;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--primary), #ff8a65);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.nav-cta {
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  position: absolute;
  transition: var(--transition);
}

.nav-toggle span::before {
  transform: translateY(-6px);
}

.nav-toggle span::after {
  transform: translateY(6px);
}

.nav-toggle.active span {
  background: transparent;
}

.nav-toggle.active span::before {
  transform: rotate(45deg);
}

.nav-toggle.active span::after {
  transform: rotate(-45deg);
}

/* ===== 按钮体系 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
}

.btn-small {
  padding: 8px 20px;
  font-size: 14px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(233, 69, 96, 0.4);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(233, 69, 96, 0.3);
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(233, 69, 96, 0.04);
}

.btn-outline-light {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #fff;
  color: #fff;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 17px;
}

/* ===== 文章页 Banner ===== */
.article-banner {
  position: relative;
  padding: 140px 0 60px;
  background: linear-gradient(135deg, var(--bg-dark), var(--secondary) 60%, var(--secondary-light));
  color: #fff;
  overflow: hidden;
}

.article-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.article-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(233, 69, 96, 0.25) 0%, transparent 50%),
              linear-gradient(180deg, rgba(15, 22, 38, 0.7) 0%, rgba(15, 22, 38, 0.9) 100%);
}

.banner-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.banner-crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px 16px;
  border-radius: 999px;
  backdrop-filter: blur(10px);
}

.banner-crumb a:hover {
  color: #fff;
}

.banner-crumb .sep {
  opacity: 0.5;
}

.banner-crumb .current {
  color: #fff;
  font-weight: 600;
}

.banner-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.banner-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.banner-meta .badge {
  background: var(--accent);
  color: var(--bg-dark);
  font-weight: 700;
}

/* ===== 文章主体 ===== */
.article-main {
  position: relative;
  z-index: 3;
  margin-top: -40px;
  padding: 0 0 80px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: start;
}

.article-content-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 48px 56px;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.article-content-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-content-body h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}

.article-content-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--secondary);
}

.article-content-body p {
  margin: 12px 0;
}

.article-content-body ul,
.article-content-body ol {
  margin: 12px 0;
  padding-left: 20px;
}

.article-content-body ul li {
  position: relative;
  padding: 6px 0 6px 8px;
}

.article-content-body ul li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.article-content-body ol {
  list-style: decimal;
}

.article-content-body ol li {
  padding: 4px 0;
}

.article-content-body blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
  color: var(--secondary);
  font-style: normal;
}

.article-content-body img {
  border-radius: var(--radius);
  margin: 24px 0;
  box-shadow: var(--shadow-md);
}

.article-content-body a {
  color: var(--primary);
  font-weight: 500;
  border-bottom: 1px solid transparent;
}

.article-content-body a:hover {
  border-bottom-color: var(--primary);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.article-tags .tag {
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--bg);
  font-size: 13px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.article-tags .tag:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== 侧边栏 ===== */
.article-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  border: 1px solid var(--border);
}

.sidebar-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-card-title::after {
  content: "";
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), transparent);
  border-radius: 2px;
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-list li a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.sidebar-list li a:hover {
  background: var(--bg);
}

.sidebar-list .num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg);
  color: var(--text-muted);
  margin-top: 2px;
}

.sidebar-list li:nth-child(1) .num {
  background: linear-gradient(135deg, #ff6b6b, var(--primary));
  color: #fff;
}

.sidebar-list li:nth-child(2) .num {
  background: linear-gradient(135deg, #ffa726, #ff9800);
  color: #fff;
}

.sidebar-list li:nth-child(3) .num {
  background: linear-gradient(135deg, #42a5f5, #1976d2);
  color: #fff;
}

.sidebar-list .text {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

.sidebar-list li a:hover .text {
  color: var(--primary);
}

.sidebar-ad {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  border-radius: var(--radius);
  padding: 32px 28px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.sidebar-ad::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(233, 69, 96, 0.4);
}

.sidebar-ad h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.sidebar-ad p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  line-height: 1.7;
}

/* ===== 推荐文章 ===== */
.recommend-section {
  padding: 60px 0;
  background: var(--bg);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), #ff8a65);
  margin-top: 8px;
}

.section-sub {
  color: var(--text-muted);
  font-size: 14px;
}

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

.recommend-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.recommend-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.recommend-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.recommend-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.recommend-card:hover .recommend-img img {
  transform: scale(1.06);
}

.recommend-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(233, 69, 96, 0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

.recommend-body {
  padding: 20px;
}

.recommend-body h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recommend-body h3 a:hover {
  color: var(--primary);
}

.recommend-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 空状态 ===== */
.not-found-wrap {
  text-align: center;
  padding: 80px 32px;
}

.not-found-icon {
  font-size: 64px;
  margin-bottom: 20px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.not-found-wrap h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
}

.not-found-wrap p {
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ===== FAQ 区块 ===== */
.faq-section {
  padding: 80px 0;
  background: var(--bg);
}

.faq-grid {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  transition: var(--transition);
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ===== CTA 区块 ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, var(--secondary), var(--bg-dark));
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

.cta-section::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.2) 0%, transparent 70%);
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.cta-inner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: #fff;
  padding: 60px 0 0;
}

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

.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  flex: 1;
  min-width: 280px;
}

.footer-brand .logo {
  font-size: 24px;
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 15px;
  line-height: 1.8;
  max-width: 360px;
}

.footer-links {
  display: flex;
  gap: 48px;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.9);
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 通用工具类 ===== */
.text-gradient {
  background: linear-gradient(100deg, var(--primary), #ff8a65);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center {
  text-align: center;
}

.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-card {
    flex: 1;
    min-width: 260px;
  }

  .recommend-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --container-w: 100%;
  }

  .site-header {
    top: 12px;
  }

  .header-inner {
    height: 56px;
    padding: 0 16px;
    gap: 8px;
  }

  .logo {
    font-size: 16px;
  }

  .site-nav {
    position: fixed;
    top: 80px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px) scale(0.96);
    transition: var(--transition);
    max-height: 70vh;
    overflow-y: auto;
  }

  .site-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .article-banner {
    padding: 120px 0 50px;
  }

  .banner-title {
    font-size: 28px;
  }

  .banner-meta {
    gap: 12px;
  }

  .article-content-card {
    padding: 28px 24px;
    border-radius: 20px;
  }

  .article-content-body {
    font-size: 15px;
  }

  .article-content-body h2 {
    font-size: 22px;
  }

  .article-content-body h3 {
    font-size: 18px;
  }

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

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .section-title {
    font-size: 24px;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 24px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer-inner {
    padding: 0 20px 20px;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 0 12px;
  }

  .header-inner {
    padding: 0 12px;
  }

  .logo {
    font-size: 15px;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .article-banner {
    padding: 110px 0 40px;
  }

  .banner-title {
    font-size: 24px;
  }

  .banner-crumb {
    font-size: 12px;
    padding: 5px 12px;
  }

  .banner-meta {
    gap: 8px;
    font-size: 13px;
  }

  .banner-meta .badge {
    font-size: 12px;
    padding: 3px 10px;
  }

  .article-content-card {
    padding: 20px 16px;
    border-radius: 16px;
  }

  .article-content-body ul,
  .article-content-body ol {
    padding-left: 16px;
  }

  .sidebar-card {
    padding: 20px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .footer-brand .logo {
    font-size: 20px;
  }
}

/* ===== 焦点可访问性 ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

a:active,
button:active,
.btn:active {
  transform: scale(0.97);
}

/* roulang page: category1 */
:root {
  --primary: #14213d;
  --primary-light: #1d2f52;
  --accent: #f0a12b;
  --accent-2: #e85d3f;
  --bg: #f5f7fb;
  --bg-card: #ffffff;
  --bg-dark: #0f1a2e;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(20, 33, 61, 0.08);
  --shadow-lg: 0 16px 48px rgba(20, 33, 61, 0.14);
  --transition: 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
::selection { background: rgba(240, 161, 43, 0.25); }
:focus-visible { outline: 3px solid rgba(240, 161, 43, 0.5); outline-offset: 2px; border-radius: 6px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-head .section-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(240, 161, 43, 0.12); color: #b07d1e; font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 999px; letter-spacing: 0.5px; }
.section-head h2 { font-size: 34px; line-height: 1.3; margin: 16px 0 12px; color: var(--text); font-weight: 700; }
.section-head p { font-size: 16px; color: var(--text-weak); }
.section-tag.light { background: rgba(255, 255, 255, 0.12); color: var(--accent); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: none; border-radius: 999px; font-weight: 600; text-align: center; transition: all var(--transition); }
.btn:active { transform: scale(0.97); }
.btn-small { padding: 8px 20px; font-size: 14px; }
.btn-primary { background: var(--accent); color: #14213d; box-shadow: 0 4px 14px rgba(240, 161, 43, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240, 161, 43, 0.4); }
.btn-ghost { background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.35); color: #fff; padding: 12px 28px; border-radius: 999px; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); transform: translateY(-2px); }

.site-header { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); width: min(1200px, calc(100% - 32px)); z-index: 1000; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-radius: 999px; padding: 12px 16px 12px 24px; box-shadow: 0 4px 24px rgba(20, 33, 61, 0.1); border: 1px solid rgba(255, 255, 255, 0.7); }
.logo { font-size: 19px; font-weight: 800; color: var(--primary); letter-spacing: 0.3px; display: flex; align-items: center; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 2px; flex: 1; justify-content: center; }
.nav-link { padding: 8px 16px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--text); white-space: nowrap; transition: all var(--transition); }
.nav-link:hover { background: rgba(20, 33, 61, 0.06); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(20, 33, 61, 0.24); }
.nav-cta { white-space: nowrap; }
.nav-toggle { display: none; background: none; border: none; width: 42px; height: 42px; border-radius: 50%; align-items: center; justify-content: center; position: relative; }
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after { content: ''; display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--primary); position: relative; transition: all 0.3s; }
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

.page-hero { position: relative; padding: 196px 0 104px; background-size: cover; background-position: center; background-color: #0f1a2e; color: #fff; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15, 26, 46, 0.9) 0%, rgba(20, 33, 61, 0.76) 60%, rgba(20, 33, 61, 0.52) 100%); }
.page-hero .container { position: relative; z-index: 2; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(240, 161, 43, 0.18); border: 1px solid rgba(240, 161, 43, 0.4); color: var(--accent); font-size: 13px; font-weight: 600; padding: 6px 18px; border-radius: 999px; letter-spacing: 1px; }
.page-hero h1 { font-size: 52px; line-height: 1.2; margin: 20px 0 16px; font-weight: 800; letter-spacing: 1px; }
.page-hero .lead { font-size: 18px; max-width: 620px; color: rgba(255, 255, 255, 0.85); }
.hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; margin-top: 54px; padding-top: 36px; border-top: 1px solid rgba(255, 255, 255, 0.2); }
.hero-stats strong { display: block; font-size: 32px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stats span { font-size: 14px; color: rgba(255, 255, 255, 0.7); }

.entry-overview { background: var(--bg); }
.entry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.entry-card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: all var(--transition); border: 1px solid var(--border); }
.entry-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(240, 161, 43, 0.3); }
.entry-cover { position: relative; height: 200px; overflow: hidden; }
.entry-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.entry-card:hover .entry-cover img { transform: scale(1.06); }
.entry-badge { position: absolute; top: 14px; right: 14px; background: var(--accent); color: #14213d; font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 999px; box-shadow: 0 4px 12px rgba(240, 161, 43, 0.3); }
.entry-body { padding: 26px 24px; }
.entry-body h3 { font-size: 20px; margin-bottom: 10px; color: var(--text); }
.entry-body p { font-size: 14px; color: var(--text-weak); margin-bottom: 16px; line-height: 1.7; }
.entry-body ul { margin-bottom: 18px; display: grid; gap: 8px; }
.entry-body li { font-size: 14px; color: var(--text); padding-left: 22px; position: relative; line-height: 1.6; }
.entry-body li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.text-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; transition: gap 0.3s; }
.text-link:hover { gap: 10px; }

.section-dark { background: var(--bg-dark); }
.section-dark .section-head h2 { color: #fff; }
.section-dark .section-head p { color: rgba(255, 255, 255, 0.65); }
.steps-list { display: grid; gap: 0; max-width: 840px; margin: 0 auto; position: relative; }
.steps-list::before { content: ''; position: absolute; left: 55px; top: 40px; bottom: 40px; width: 2px; background: linear-gradient(to bottom, rgba(240, 161, 43, 0.6), rgba(240, 161, 43, 0.12)); }
.step-item { display: flex; gap: 28px; position: relative; padding: 28px 0; }
.step-num { width: 64px; height: 64px; flex-shrink: 0; background: var(--primary-light); border: 2px solid var(--accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 800; color: var(--accent); position: relative; z-index: 2; }
.step-content { flex: 1; background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius); padding: 26px 30px; transition: all 0.3s; }
.step-content:hover { border-color: rgba(240, 161, 43, 0.35); background: rgba(240, 161, 43, 0.04); }
.step-content h3 { font-size: 18px; color: #fff; margin-bottom: 6px; }
.step-content p { font-size: 14px; color: rgba(255, 255, 255, 0.65); line-height: 1.7; }
.step-progress { position: absolute; left: 0; right: 0; bottom: 8px; height: 2px; background: rgba(255, 255, 255, 0.06); border-radius: 2px; overflow: hidden; }
.step-progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 2px; }

.access-tips { background: var(--bg-card); }
.tips-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: center; }
.tips-media { position: relative; }
.tips-media img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.tips-media::after { content: ''; position: absolute; inset: 20px -20px -20px 20px; border-radius: var(--radius); background: linear-gradient(135deg, rgba(240, 161, 43, 0.2), transparent); z-index: -1; }
.tips-content .section-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(240, 161, 43, 0.12); color: #b07d1e; font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 999px; letter-spacing: 0.5px; }
.tips-content h2 { font-size: 32px; margin: 14px 0 26px; line-height: 1.3; }
.tip-list { display: grid; gap: 24px; }
.tip-item { display: flex; gap: 16px; }
.tip-icon { width: 38px; height: 38px; flex-shrink: 0; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; }
.tip-item h3 { font-size: 16px; margin-bottom: 2px; }
.tip-item p { font-size: 14px; color: var(--text-weak); line-height: 1.7; }

.hot-grid { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.rank-item { display: grid; grid-template-columns: 56px 1fr auto; align-items: center; gap: 20px; background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius); padding: 20px 24px; position: relative; transition: all 0.3s; overflow: hidden; }
.rank-item:hover { border-color: rgba(240, 161, 43, 0.35); transform: translateX(6px); }
.rank-num { font-size: 28px; font-weight: 800; color: rgba(255, 255, 255, 0.2); font-style: italic; line-height: 1; }
.rank-item:nth-child(1) .rank-num { color: var(--accent); }
.rank-item:nth-child(2) .rank-num { color: #c0c0c0; }
.rank-item:nth-child(3) .rank-num { color: #cd7f32; }
.rank-info h3 { color: #fff; font-size: 16px; margin-bottom: 4px; }
.rank-info p { font-size: 13px; color: rgba(255, 255, 255, 0.55); }
.rank-tag { font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 999px; white-space: nowrap; }
.rank-tag.hot { background: rgba(232, 93, 63, 0.2); color: #ff9d8a; }
.rank-tag.normal { background: rgba(255, 255, 255, 0.1); color: rgba(255, 255, 255, 0.7); }
.rank-bar { position: absolute; bottom: 0; left: 0; height: 3px; background: rgba(255, 255, 255, 0.06); width: 100%; }
.rank-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--bg-card); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: all 0.3s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(240, 161, 43, 0.25); }
.news-tag { display: inline-flex; align-self: flex-start; background: rgba(240, 161, 43, 0.12); color: #b07d1e; font-size: 12px; font-weight: 600; padding: 3px 14px; border-radius: 999px; margin-bottom: 14px; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 16px; color: var(--text); flex: 1; }
.news-date { font-size: 13px; color: var(--text-weak); display: flex; align-items: center; gap: 6px; }

.faq-list { max-width: 780px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: border-color 0.3s; }
.faq-item.open { border-color: rgba(240, 161, 43, 0.35); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; background: none; border: none; font-size: 16px; font-weight: 600; color: var(--text); text-align: left; }
.faq-icon { width: 32px; height: 32px; flex-shrink: 0; border-radius: 50%; background: rgba(20, 33, 61, 0.06); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 400; transition: all 0.3s; }
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-answer .inner { padding: 0 24px 24px; font-size: 14px; color: var(--text-weak); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 400px; }

.cta-section { padding: 80px 0; }
.cta-box { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: 28px; padding: 72px 48px; text-align: center; color: #fff; position: relative; overflow: hidden; box-shadow: var(--shadow-lg); }
.cta-box::before { content: ''; position: absolute; width: 420px; height: 420px; border-radius: 50%; background: rgba(240, 161, 43, 0.18); top: -180px; right: -120px; }
.cta-box::after { content: ''; position: absolute; width: 260px; height: 260px; border-radius: 50%; background: rgba(255, 255, 255, 0.06); bottom: -100px; left: -60px; }
.cta-box h2 { font-size: 34px; margin-bottom: 12px; position: relative; z-index: 2; }
.cta-box p { font-size: 16px; color: rgba(255, 255, 255, 0.7); margin-bottom: 32px; position: relative; z-index: 2; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 2; }
.btn-light { background: #fff; color: var(--primary); padding: 12px 32px; }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16); }
.btn-outline-light { border: 1px solid rgba(255, 255, 255, 0.5); color: #fff; padding: 12px 32px; }
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }

.site-footer { background: var(--bg-dark); color: rgba(255, 255, 255, 0.7); padding: 60px 0 0; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.footer-brand .logo { color: #fff; font-size: 20px; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; max-width: 340px; color: rgba(255, 255, 255, 0.5); line-height: 1.7; }
.footer-links h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-links ul { display: grid; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.6); transition: color 0.3s; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { padding: 22px 0; text-align: center; font-size: 13px; color: rgba(255, 255, 255, 0.4); }

@media (max-width: 1024px) {
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
  .site-nav { gap: 0; }
  .nav-link { padding: 8px 12px; font-size: 13px; }
  .tips-grid { gap: 40px; }
  .page-hero { padding: 176px 0 80px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .page-hero { padding: 158px 0 64px; }
  .page-hero h1 { font-size: 36px; }
  .page-hero .lead { font-size: 16px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .entry-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; gap: 40px; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .site-nav { display: none; position: absolute; top: calc(100% + 12px); left: 0; right: 0; background: #fff; border-radius: 20px; flex-direction: column; padding: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
  .site-nav.open { display: flex; }
  .site-nav .nav-link { width: 100%; text-align: center; padding: 12px 16px; }
  .nav-toggle { display: flex; }
  .header-inner { padding: 10px 12px 10px 20px; }
  .nav-cta { display: none; }
  .step-item { flex-direction: column; gap: 12px; padding: 20px 0; }
  .steps-list::before { left: 31px; top: 30px; bottom: 30px; }
  .step-num { width: 48px; height: 48px; font-size: 16px; }
  .step-content { padding: 20px; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 28px; }
  .cta-actions .btn { width: 100%; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .page-hero h1 { font-size: 30px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { gap: 16px; }
  .hero-stats strong { font-size: 26px; }
  .section-head h2 { font-size: 26px; }
  .rank-item { grid-template-columns: 40px 1fr; gap: 12px; padding: 16px; }
  .rank-tag { grid-column: 2; justify-self: start; margin-top: 4px; }
  .rank-num { font-size: 24px; }
  .entry-body { padding: 20px; }
  .news-card { padding: 22px; }
  .faq-question { font-size: 15px; padding: 18px 16px; }
  .faq-answer .inner { padding: 0 16px 18px; }
  .cta-box { padding: 40px 20px; border-radius: 20px; }
  .cta-box h2 { font-size: 24px; }
  .logo { font-size: 16px; }
}

/* roulang page: category2 */
:root{
  --primary:#3b6cff;
  --primary-dark:#2a50cc;
  --accent:#00d4aa;
  --ink:#0d1220;
  --text:#1f2937;
  --muted:#64748b;
  --bg:#f6f8fc;
  --surface:#ffffff;
  --border:#e5eaf2;
  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-xs:0 2px 10px rgba(13,18,32,.05);
  --shadow-sm:0 4px 18px rgba(13,18,32,.07);
  --shadow-md:0 10px 34px rgba(13,18,32,.09);
  --shadow-lg:0 22px 60px rgba(13,18,32,.15);
  --header-h:64px;
  --space-section:110px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:all .25s ease}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 28px}
.section{padding:var(--space-section) 0}
.section-alt{background:var(--surface)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border-radius:999px;font-weight:600;font-size:15px;
  transition:all .28s cubic-bezier(.4,0,.2,1);white-space:nowrap;
}
.btn:focus-visible{outline:3px solid rgba(59,108,255,.4);outline-offset:3px}
.btn-primary{
  background:linear-gradient(135deg,#3b6cff,#00c8f0);
  color:#fff;box-shadow:0 10px 28px rgba(59,108,255,.35);
  padding:15px 36px;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(59,108,255,.48)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  border:1px solid rgba(255,255,255,.35);color:#fff;
  padding:15px 34px;background:rgba(255,255,255,.06);backdrop-filter:blur(8px);
}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.14)}
.btn-small{padding:8px 20px;font-size:14px}
.btn-block{width:100%}
.btn-outline-dark{
  border:1px solid var(--border);color:var(--text);background:var(--surface);
  padding:10px 22px;font-size:14px;
}
.btn-outline-dark:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow-sm)}

.site-header{
  position:sticky;top:14px;z-index:200;padding:0 20px;
}
.header-inner{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  height:var(--header-h);padding:0 18px 0 26px;
  background:rgba(13,18,32,.82);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.09);
  border-radius:999px;
  box-shadow:0 14px 44px rgba(13,18,32,.38);
}
.logo{
  font-size:20px;font-weight:800;letter-spacing:.4px;white-space:nowrap;
  background:linear-gradient(120deg,#fff 0%,#cfd8ff 60%,#7ef5dd 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.site-nav{display:flex;align-items:center;gap:4px}
.nav-link{
  padding:8px 17px;border-radius:999px;font-size:15px;font-weight:500;
  color:rgba(255,255,255,.74);transition:all .25s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.09)}
.nav-link.active{
  color:#fff;
  background:linear-gradient(135deg,#3b6cff,#00c8f0);
  box-shadow:0 6px 20px rgba(59,108,255,.45);
}
.nav-cta{
  margin-left:4px;
  background:linear-gradient(135deg,#3b6cff,#00d4aa);
  color:#fff;box-shadow:0 8px 24px rgba(59,108,255,.35);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(59,108,255,.5)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:50%;
  background:rgba(255,255,255,.08);
  align-items:center;justify-content:center;
}
.nav-toggle span{
  position:relative;width:20px;height:2px;background:#fff;border-radius:2px;
  transition:background .3s ease;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:'';position:absolute;left:0;width:20px;height:2px;background:#fff;border-radius:2px;
  transition:transform .3s ease,top .3s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{top:0;transform:rotate(45deg)}
.nav-toggle.open span::after{top:0;transform:rotate(-45deg)}

.hero{
  position:relative;
  min-height:540px;
  display:flex;align-items:center;
  background:
    linear-gradient(115deg,rgba(8,12,26,.88) 0%,rgba(10,16,32,.72) 45%,rgba(15,22,42,.55) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:140px 0 84px;
  overflow:hidden;
}
.hero::after{
  content:'';position:absolute;right:-140px;top:-80px;width:460px;height:460px;
  background:radial-gradient(circle,rgba(59,108,255,.35) 0%,transparent 68%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:820px;margin:0 auto;text-align:center;color:#fff}
.hero .badge{display:inline-flex;align-items:center;gap:8px;padding:7px 18px;border-radius:999px;
  background:rgba(0,212,170,.16);border:1px solid rgba(0,212,170,.4);
  color:#7ef5dd;font-size:13px;font-weight:600;letter-spacing:.4px;
  backdrop-filter:blur(6px);margin-bottom:26px;
}
.hero h1{
  font-size:clamp(32px,5vw,56px);line-height:1.16;font-weight:800;letter-spacing:1px;
  text-shadow:0 4px 30px rgba(0,0,0,.3);
}
.hero h1 span{
  background:linear-gradient(120deg,#7ef5dd,#4f8cff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-desc{
  max-width:680px;margin:22px auto 0;font-size:17px;line-height:1.8;
  color:rgba(255,255,255,.82);
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.hero-stats{
  display:flex;justify-content:center;gap:52px;flex-wrap:wrap;
  margin-top:56px;padding-top:34px;border-top:1px solid rgba(255,255,255,.14);
}
.hero-stats .stat-item{text-align:center}
.hero-stats .stat-num{
  font-size:30px;font-weight:800;color:#fff;line-height:1.2;
  background:linear-gradient(120deg,#fff,#9ec5ff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-stats .stat-label{font-size:13px;color:rgba(255,255,255,.6);margin-top:4px;letter-spacing:.3px}

.section-head{max-width:720px;margin:0 auto 54px;text-align:center}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 20px;border-radius:999px;font-size:13px;font-weight:700;letter-spacing:.6px;
  background:rgba(59,108,255,.09);color:var(--primary);
}
.section-title{font-size:clamp(28px,3.4vw,38px);line-height:1.24;font-weight:800;margin:18px 0 14px;color:var(--ink)}
.section-sub{font-size:16px;color:var(--muted)}

.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.download-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--shadow-xs);
  transition:transform .3s ease,box-shadow .3s ease;
}
.download-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.download-cover{position:relative;height:210px;overflow:hidden}
.download-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.download-card:hover .download-cover img{transform:scale(1.06)}
.download-cover::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(10,14,26,.55) 100%);
}
.heat-tag{
  position:absolute;top:14px;left:14px;z-index:2;
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#ff5f6d,#ff9a56);
  box-shadow:0 6px 18px rgba(255,95,109,.4);
}
.heat-tag i{font-size:11px}
.version-tag{
  position:absolute;bottom:14px;right:14px;z-index:2;
  padding:5px 14px;border-radius:999px;font-size:12px;font-weight:700;color:#fff;
  background:rgba(0,0,0,.42);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.18);
}
.download-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.download-body h3{font-size:21px;font-weight:800;color:var(--ink)}
.download-body .device-line{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-top:6px;
}
.download-body .device-line i{color:var(--primary)}
.download-body p{font-size:14px;color:var(--muted);margin-top:14px;line-height:1.7}
.feature-list{margin:18px 0 24px;display:grid;gap:10px;flex:1}
.feature-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text);line-height:1.6;
}
.feature-list li i{
  color:var(--accent);font-size:14px;margin-top:3px;
  background:rgba(0,212,170,.12);border-radius:50%;
  width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px 30px;transition:all .3s ease;position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;left:0;top:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:opacity .3s ease;
}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:transparent}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:54px;height:54px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  font-size:22px;color:#fff;margin-bottom:20px;
  background:linear-gradient(135deg,var(--primary),#00c8f0);
  box-shadow:0 8px 22px rgba(59,108,255,.28);
}
.feature-card:nth-child(2) .feature-icon{background:linear-gradient(135deg,#ff6b6b,#ff9a56);box-shadow:0 8px 22px rgba(255,107,107,.28)}
.feature-card:nth-child(3) .feature-icon{background:linear-gradient(135deg,#00d4aa,#3b6cff);box-shadow:0 8px 22px rgba(0,212,170,.28)}
.feature-card:nth-child(4) .feature-icon{background:linear-gradient(135deg,#9b5cff,#5b8cff);box-shadow:0 8px 22px rgba(155,92,255,.28)}
.feature-card:nth-child(5) .feature-icon{background:linear-gradient(135deg,#f7b500,#ff7a59);box-shadow:0 8px 22px rgba(247,181,0,.28)}
.feature-card:nth-child(6) .feature-icon{background:linear-gradient(135deg,#2bd9c5,#4f9cff);box-shadow:0 8px 22px rgba(43,217,197,.28)}
.feature-card h3{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.75}

.steps-section{
  background:
    linear-gradient(135deg,rgba(13,18,32,.94),rgba(20,30,56,.92)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;
}
.steps-section .section-head .section-tag{background:rgba(0,212,170,.14);color:#7ef5dd}
.steps-section .section-head .section-title{color:#fff}
.steps-section .section-head .section-sub{color:rgba(255,255,255,.6)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.step-item{
  position:relative;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-lg);padding:30px 24px 26px;
  backdrop-filter:blur(8px);transition:transform .3s ease,background .3s ease;
}
.step-item:hover{transform:translateY(-5px);background:rgba(255,255,255,.1)}
.step-num{
  width:50px;height:50px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:800;color:#fff;margin-bottom:20px;
  background:linear-gradient(135deg,#3b6cff,#00d4aa);
  box-shadow:0 8px 22px rgba(59,108,255,.4);
}
.step-item h3{font-size:17px;font-weight:700;margin-bottom:9px}
.step-item p{font-size:14px;color:rgba(255,255,255,.62);line-height:1.7}
.step-progress{position:absolute;bottom:20px;left:24px;right:24px;height:4px;border-radius:4px;background:rgba(255,255,255,.12);overflow:hidden;}
.step-progress i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,#3b6cff,#00d4aa)}

.changelog-wrap{
  max-width:840px;margin:0 auto;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.changelog-list{display:grid;grid-template-columns:1fr 1fr;gap:0}
.changelog-item{padding:28px 30px;border-bottom:1px solid var(--border);transition:background .25s ease}
.changelog-item:nth-child(odd){border-right:1px solid var(--border)}
.changelog-item:hover{background:#fafbff}
.changelog-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.version-badge{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;
  padding:5px 14px;border-radius:999px;
  background:linear-gradient(135deg,rgba(59,108,255,.1),rgba(0,212,170,.1));
  color:var(--primary);
}
.ver-stable{background:rgba(0,212,170,.13);color:#00997b}
.changelog-item h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px}
.changelog-item p{font-size:13.5px;color:var(--muted);line-height:1.7}
.release-bar{display:flex;align-items:center;gap:14px;margin-top:16px}
.release-bar .progress-track{flex:1;height:7px;background:#eef1f8;border-radius:99px;overflow:hidden}
.release-bar .progress-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,#3b6cff,#00d4aa)}
.release-bar span{font-size:12px;font-weight:700;color:var(--muted);white-space:nowrap}

.faq-wrap{max-width:840px;margin:0 auto;display:grid;gap:16px}
.faq-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
  overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease;
}
.faq-item.open{border-color:rgba(59,108,255,.35);box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;font-size:16px;font-weight:700;color:var(--ink);text-align:left;
  cursor:pointer;transition:color .25s ease;
}
.faq-q:hover{color:var(--primary)}
.faq-q .faq-icon{
  width:32px;height:32px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(59,108,255,.09);color:var(--primary);
  transition:transform .35s ease,background .3s ease,color .3s ease;
}
.faq-item.open .faq-q .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-inner{padding:0 26px 24px;font-size:14.5px;color:var(--muted);line-height:1.8}

.cta-section{
  position:relative;border-radius:var(--radius-xl);
  background:
    linear-gradient(120deg,rgba(13,18,32,.92),rgba(30,45,85,.88)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding:70px 50px;text-align:center;color:#fff;overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.cta-section::before{
  content:'';position:absolute;left:50%;top:-100px;transform:translateX(-50%);
  width:500px;height:300px;background:radial-gradient(ellipse,rgba(59,108,255,.35),transparent 70%);
}
.cta-inner{position:relative;z-index:2}
.cta-inner h2{font-size:clamp(26px,3vw,36px);font-weight:800;margin-bottom:14px;letter-spacing:.5px}
.cta-inner p{max-width:620px;margin:0 auto 34px;color:rgba(255,255,255,.72);font-size:16px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

.site-footer{
  background:var(--ink);color:rgba(255,255,255,.72);
  padding:70px 0 0;margin-top:0;
}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 28px}
.footer-top{display:flex;justify-content:space-between;gap:48px;padding-bottom:46px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{max-width:400px}
.footer-brand .logo{font-size:22px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.56)}
.footer-links{display:flex;gap:70px}
.footer-links h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.4px}
.footer-links ul{display:grid;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.62);transition:color .25s ease;padding-left:0}
.footer-links a:hover{color:#fff;padding-left:6px}
.footer-bottom{
  padding:24px 0 28px;text-align:center;font-size:13px;color:rgba(255,255,255,.45);
}

@media (max-width:1024px){
  :root{--space-section:84px}
  .download-grid{grid-template-columns:1fr 1fr}
  .features-grid{grid-template-columns:1fr 1fr}
  .steps-grid{grid-template-columns:1fr 1fr;gap:20px}
  .changelog-list{grid-template-columns:1fr}
  .changelog-item:nth-child(odd){border-right:none}
}
@media (max-width:768px){
  .site-header{top:10px;padding:0 12px}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .site-nav{
    position:fixed;top:72px;left:14px;right:14px;
    background:rgba(13,18,32,.97);
    backdrop-filter:blur(20px);
    flex-direction:column;align-items:stretch;gap:8px;
    padding:18px;border-radius:22px;
    border:1px solid rgba(255,255,255,.1);
    box-shadow:0 24px 60px rgba(0,0,0,.5);
    transform:translateY(-14px);opacity:0;visibility:hidden;
    transition:all .3s ease;
  }
  .site-nav.open{transform:translateY(0);opacity:1;visibility:visible}
  .site-nav .nav-link{
    display:block;text-align:center;padding:13px 16px;font-size:15px;
    color:rgba(255,255,255,.85);
  }
  .site-nav .nav-link.active{
    background:linear-gradient(135deg,#3b6cff,#00c8f0);
    color:#fff;box-shadow:0 6px 20px rgba(59,108,255,.4);
  }
  .hero{min-height:480px;padding:120px 0 60px}
  .hero-stats{gap:32px}
  .footer-top{flex-direction:column;gap:36px}
  .footer-links{gap:36px}
}
@media (max-width:520px){
  :root{--space-section:66px}
  .container{padding:0 18px}
  .header-inner{height:58px;padding:0 10px 0 18px}
  .logo{font-size:17px}
  .hero h1{font-size:30px}
  .hero-desc{font-size:15px}
  .hero-actions .btn{padding:13px 26px;font-size:14px}
  .hero-stats{gap:24px}
  .hero-stats .stat-num{font-size:24px}
  .download-grid,.features-grid,.steps-grid{grid-template-columns:1fr}
  .section-title{font-size:25px}
  .section-sub{font-size:14.5px}
  .cta-section{padding:50px 24px;border-radius:20px}
  .footer-links{flex-direction:column;gap:28px}
  .footer-bottom{padding:20px 0 24px}
}

/* roulang page: category3 */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --success: #10b981;
  --danger: #ef4444;
  --bg: #f8fafc;
  --bg-deep: #0f172a;
  --surface: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
  --spacing: 24px;
  --container-w: 1200px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
}

.btn-light {
  background: #fff;
  color: var(--primary);
}

.btn-light:hover {
  background: #f1f5f9;
  transform: translateY(-2px);
}

.btn-small {
  padding: 8px 18px;
  font-size: 14px;
}

.btn:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.4);
  outline-offset: 2px;
}

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}

.badge-accent {
  background: var(--accent-light);
  color: #b45309;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 13px;
  background: #f1f5f9;
  color: var(--text-weak);
  transition: all 0.2s ease;
}

.tag:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== Header / Dock 导航 ===== */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  pointer-events: none;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
  border-radius: 56px;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  pointer-events: auto;
}

.logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 15px;
  color: var(--text-weak);
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.nav-link:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.4);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--primary-light);
  border-radius: 50%;
  cursor: pointer;
  position: relative;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  position: relative;
  transition: all 0.3s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

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

/* ===== Hero / Banner ===== */
.page-hero {
  position: relative;
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #312e81 100%);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.4), transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.page-hero .badge {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #c7d2fe;
  backdrop-filter: blur(10px);
  margin-bottom: 20px;
}

.page-hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.page-hero p {
  color: #cbd5e1;
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #a5b4fc, #c7d2fe);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-stat span {
  font-size: 14px;
  color: #94a3b8;
}

/* ===== 板块通用 ===== */
.section {
  padding: 90px 0;
}

.section-alt {
  background: var(--surface);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-head .badge {
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-head p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.8;
}

/* ===== 安全核心卡片 ===== */
.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.security-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.security-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #8b5cf6);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.security-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.security-card:hover::before {
  transform: scaleX(1);
}

.security-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: var(--primary-light);
  color: var(--primary);
}

.security-card:nth-child(1) .icon-wrap {
  background: var(--primary-light);
  color: var(--primary);
}

.security-card:nth-child(2) .icon-wrap {
  background: #d1fae5;
  color: var(--success);
}

.security-card:nth-child(3) .icon-wrap {
  background: var(--accent-light);
  color: #d97706;
}

.security-card:nth-child(4) .icon-wrap {
  background: #fee2e2;
  color: var(--danger);
}

.security-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.security-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ===== 内容卡片列表 ===== */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  display: flex;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all 0.3s ease;
  align-items: center;
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.3);
}

.article-card .thumb {
  width: 160px;
  height: 110px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
}

.article-card .content {
  flex: 1;
}

.article-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.article-card h3 a:hover {
  color: var(--primary);
}

.article-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
}

.card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.card-meta span i {
  color: var(--primary);
  font-size: 12px;
}

.card-meta .hot {
  color: var(--danger);
  font-weight: 600;
}

.card-meta .hot i {
  color: var(--danger);
}

/* ===== 流程 / 步骤 ===== */
.flow-section {
  background: var(--bg);
}

.flow-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.flow-visual {
  background: linear-gradient(160deg, var(--bg-deep), #1e1b4b);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.flow-visual::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.flow-visual img {
  position: relative;
  z-index: 1;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.flow-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-item {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.flow-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.flow-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 15px;
}

.flow-item h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.flow-item p {
  font-size: 14px;
  color: var(--text-weak);
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 16px;
  background: var(--surface);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  padding: 22px 28px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  position: relative;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--primary);
  transition: transform 0.3s ease;
  font-size: 14px;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
}

.faq-item .faq-body {
  padding: 0 28px 24px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  padding-top: 20px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

.cta-section::after {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
}

.cta-inner {
  text-align: center;
  color: #fff;
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.cta-inner p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 32px;
  line-height: 1.8;
}

.cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-note {
  margin-top: 20px;
  font-size: 13px;
  opacity: 0.7;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  padding: 70px 0 0;
  color: #94a3b8;
}

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

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  font-size: 22px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #a5b4fc 0%, #818cf8 50%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
  color: #94a3b8;
}

.footer-links {
  display: flex;
  justify-content: flex-end;
}

.footer-links h4 {
  color: #e2e8f0;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 14px;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  padding: 28px 0;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-bottom: 20px;
}

.breadcrumb a,
.breadcrumb span {
  color: #94a3b8;
  font-size: 14px;
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb span {
  color: #cbd5e1;
}

.breadcrumb i {
  font-size: 10px;
  margin: 0 8px;
  color: #64748b;
}

/* ===== 安全提示条 ===== */
.tip-bar {
  background: var(--surface);
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  margin: 32px 0;
  box-shadow: var(--shadow-sm);
  font-size: 15px;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.tip-bar i {
  color: var(--primary);
  font-size: 20px;
  margin-top: 2px;
}

.tip-bar strong {
  color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .security-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-list {
    grid-template-columns: 1fr;
  }

  .flow-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .flow-visual {
    min-height: 300px;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat strong {
    font-size: 22px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 10px 16px;
  }

  .site-nav {
    position: fixed;
    top: calc(16px + 60px);
    left: 24px;
    right: 24px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .site-nav.open {
    transform: translateY(0) scale(1);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 14px 20px;
    text-align: center;
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-toggle.open span {
    background: transparent;
  }

  .nav-toggle.open span::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle.open span::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .nav-cta {
    display: none;
  }

  .page-hero {
    padding: 140px 0 70px;
  }

  .page-hero h1 {
    font-size: 28px;
  }

  .page-hero p {
    font-size: 15px;
  }

  .section {
    padding: 60px 0;
  }

  .section-head {
    margin-bottom: 40px;
  }

  .section-head h2 {
    font-size: 26px;
  }

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

  .article-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-card .thumb {
    width: 100%;
    height: 180px;
  }

  .hero-stats {
    gap: 16px;
  }

  .hero-stat strong {
    font-size: 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .flow-item {
    padding: 16px;
    gap: 14px;
  }

  .cta-section {
    padding: 70px 0;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 8px 12px;
    border-radius: 40px;
    gap: 10px;
  }

  .logo {
    font-size: 15px;
  }

  .nav-toggle {
    width: 36px;
    height: 36px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }

  .page-hero h1 {
    font-size: 24px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 12px;
  }

  .security-card {
    padding: 24px;
  }

  .article-card .content h3 {
    font-size: 15px;
  }

  .card-meta {
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .faq-item summary {
    padding: 18px;
    font-size: 15px;
  }

  .faq-item .faq-body {
    padding: 0 18px 18px;
  }

  .flow-visual {
    padding: 20px;
  }

  .tip-bar {
    padding: 16px;
    font-size: 14px;
  }

  .cta-btns {
    flex-direction: column;
  }

  .cta-btns .btn {
    width: 100%;
  }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease both;
}

.section {
  animation: fadeInUp 0.6s ease both;
}

.section:nth-child(2) {
  animation-delay: 0.1s;
}

/* focus 可访问性 */
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.4);
  outline-offset: 2px;
  border-radius: 6px;
}

::selection {
  background: var(--primary);
  color: #fff;
}