/* roulang page: index */
:root {
  --primary: #7C3AED;
  --primary-light: #A78BFA;
  --pink: #EC4899;
  --orange: #FB923C;
  --cyan: #06B6D4;
  --green: #10B981;
  --amber: #F59E0B;
  --ink: #0B0B12;
  --ink-2: #131320;
  --paper: #FAFAF8;
  --white: #FFFFFF;
  --text-dark: #16151E;
  --text-mid: #4E4C61;
  --text-weak: #8A879C;
  --text-on-dark: #F1F0F7;
  --text-on-dark-2: #A9A6BD;
  --text-on-dark-3: #6F6C87;
  --border: #E2E0EA;
  --gradient: linear-gradient(120deg, #7C3AED, #EC4899, #FB923C);
  --shadow-sm: 0 2px 12px rgba(11,11,18,0.06);
  --shadow-lg: 0 12px 32px rgba(124,58,237,0.14);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1200px;
  --space-section: 88px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--paper);
  color: var(--text-dark);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }

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

/* ---------- Navigation ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11,11,18,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  height: 72px;
  transition: background .3s ease;
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  font-size: 20px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.nav-links {
  display: flex; align-items: center; gap: 36px;
  list-style: none;
}
.nav-links a {
  color: var(--text-on-dark-2);
  font-size: 15px; font-weight: 500;
  position: relative;
  padding: 8px 0;
  transition: color .2s ease;
}
.nav-links a:hover { color: var(--text-on-dark); }
.nav-links a.active { color: var(--text-on-dark); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--gradient);
  border-radius: 999px;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 22px;
  border-radius: 999px;
  background: var(--gradient);
  color: #fff;
  font-size: 14px; font-weight: 600;
  transition: all .2s ease;
  border: none;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); color: #fff; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: transparent;
  border: none;
  padding: 8px;
}
.hamburger span {
  display: block; height: 2px; width: 100%;
  background: var(--text-on-dark);
  border-radius: 2px;
  transition: all .3s ease;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: rgba(11,11,18,0.96);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 36px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text-on-dark);
  font-size: 22px; font-weight: 600;
  padding: 12px 24px;
  border-radius: 16px;
  transition: background .2s ease;
}
.mobile-menu a:hover { background: rgba(255,255,255,0.06); }
.mobile-menu a.active { color: var(--cyan); }
.mobile-close {
  position: absolute; top: 24px; right: 24px;
  font-size: 32px; color: var(--text-on-dark);
  background: none; border: none; line-height: 1;
  padding: 8px;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--ink) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  position: relative;
  padding: 160px 0 100px;
  min-height: 640px;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(11,11,18,0.95) 40%, rgba(124,58,237,0.25) 100%);
}
.hero .container { position: relative; z-index: 2; display: flex; gap: 60px; align-items: center; }
.hero-left { flex: 1.1; }
.hero-right { flex: 0.9; }
.hero-tag {
  display: inline-flex; align-items: center;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(167,139,250,0.3);
  color: #C4B5FD;
  font-size: 12px; font-weight: 600;
  padding: 6px 16px; border-radius: 999px;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
  gap: 6px;
}
.hero-tag::before {
  content: ''; width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  color: var(--text-on-dark);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin-bottom: 24px;
}
.hero h1 .grad-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-on-dark-2);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  border: none;
  transition: all .2s ease;
  cursor: pointer;
}
.btn-primary { background: var(--gradient); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); filter: brightness(1.06); }
.btn-secondary { background: transparent; color: var(--text-on-dark); border: 1px solid rgba(255,255,255,0.3); }
.btn-secondary:hover { border-color: var(--primary-light); color: #C4B5FD; }

.hero-cards {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.hero-card {
  background: rgba(19,19,32,0.8);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 24px;
  position: relative;
  transition: transform .2s ease, box-shadow .2s ease;
  backdrop-filter: blur(8px);
}
.hero-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.status-dot {
  position: absolute; top: 20px; right: 20px;
  width: 8px; height: 8px; border-radius: 50%;
}
.status-dot.green { background: var(--green); box-shadow: 0 0 8px rgba(16,185,129,0.6); }
.status-dot.cyan { background: var(--cyan); box-shadow: 0 0 8px rgba(6,182,212,0.6); }
.status-dot.amber { background: var(--amber); box-shadow: 0 0 8px rgba(245,158,11,0.6); }
.hero-card .num {
  font-size: 44px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 8px;
}
.hero-card:first-child .num { color: var(--cyan); background: none; -webkit-text-fill-color: var(--cyan); }
.hero-card:nth-child(4) .num { color: var(--cyan); background: none; -webkit-text-fill-color: var(--cyan); }
.hero-card .label { font-size: 13px; color: var(--text-on-dark-2); }
.hero-card .progress {
  height: 3px; background: rgba(255,255,255,0.08); border-radius: 2px;
  margin-top: 12px; overflow: hidden;
}
.hero-card .progress i {
  display: block; height: 100%; border-radius: 2px;
  background: var(--gradient);
}

/* ---------- Stats Section ---------- */
.stats-section {
  background: var(--paper);
  padding: var(--space-section) 0;
}
.stats-head { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: rgba(124,58,237,0.08);
  padding: 6px 18px; border-radius: 999px;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-title { font-size: 34px; font-weight: 700; color: var(--text-dark); line-height: 1.3; margin-bottom: 12px; }
.section-sub { font-size: 15px; color: var(--text-weak); max-width: 600px; margin: 0 auto; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 24px;
}
.stat-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  position: relative;
  transition: transform .2s ease, box-shadow .2s ease;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-dot {
  width: 8px; height: 8px; border-radius: 50%;
  position: absolute; top: 18px; left: 20px;
}
.stat-dot.green { background: var(--green); }
.stat-dot.cyan { background: var(--cyan); }
.stat-dot.amber { background: var(--amber); }
.stat-dot.purple { background: var(--primary); }
.stat-card .stat-num {
  font-size: 48px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin: 12px 0 8px;
}
.stat-card:nth-child(2) .stat-num { color: var(--cyan); background: none; -webkit-text-fill-color: var(--cyan); }
.stat-card .stat-label { font-size: 14px; color: var(--text-mid); }

/* ---------- Services ---------- */
.services-section {
  background: var(--white);
  padding: var(--space-section) 0;
}
.services-head { text-align: center; margin-bottom: 48px; }
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--paper);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  border: 1px solid rgba(226,224,234,0.6);
  position: relative;
  transition: all .2s ease;
}
.service-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card .icon-box {
  width: 52px; height: 52px;
  background: var(--gradient);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.service-card .icon-box svg { width: 24px; height: 24px; stroke: #fff; fill: none; stroke-width: 2; }
.service-card .card-no {
  position: absolute; top: 24px; right: 28px;
  font-size: 14px; font-weight: 600; color: var(--text-weak);
  letter-spacing: 0.05em;
}
.service-card h3 { font-size: 20px; font-weight: 600; color: var(--text-dark); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 20px; }
.service-card .card-line {
  height: 1px; background: var(--border); margin-bottom: 16px;
}
.service-card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--primary);
  transition: gap .2s ease;
}
.service-card .card-link:hover { gap: 10px; }
.service-card .card-link svg { width: 16px; height: 16px; stroke: var(--primary); fill: none; stroke-width: 2.5; }

/* ---------- Comparison ---------- */
.compare-section {
  background: var(--ink);
  padding: var(--space-section) 0;
  position: relative;
  overflow: hidden;
}
.compare-section::before {
  content: '';
  position: absolute; top: -120px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 60%);
  border-radius: 50%;
}
.compare-wrap {
  display: flex; gap: 60px; align-items: center;
  position: relative; z-index: 2;
}
.compare-left { flex: 1; }
.compare-left h2 { font-size: 34px; font-weight: 700; color: var(--text-on-dark); line-height: 1.3; margin-bottom: 24px; }
.compare-left p { color: var(--text-on-dark-2); font-size: 15px; line-height: 1.8; margin-bottom: 32px; }
.compare-data {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.compare-data-item .cd-num {
  font-size: 40px; font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.compare-data-item .cd-label { font-size: 13px; color: var(--text-on-dark-3); margin-top: 6px; }
.compare-right {
  flex: 1;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.compare-table { width: 100%; border-collapse: separate; border-spacing: 0 8px; }
.compare-table th {
  font-size: 13px; color: var(--text-on-dark-3);
  text-align: left; padding: 12px 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.compare-table td {
  background: rgba(255,255,255,0.05);
  padding: 14px 16px;
  font-size: 14px; color: var(--text-on-dark-2);
  border-radius: 12px;
}
.compare-table td:first-child { font-weight: 600; color: var(--text-on-dark); white-space: nowrap; }
.compare-table td:last-child { color: var(--primary-light); font-weight: 600; }
.compare-table .bad-row td:nth-child(2) { opacity: 0.5; }
.compare-note {
  margin-top: 20px;
  font-size: 13px; color: var(--text-on-dark-3);
  text-align: center;
}

/* ---------- News / CMS ---------- */
.news-section {
  background: var(--paper);
  padding: var(--space-section) 0;
}
.news-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 40px; }
.news-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.news-card {
  background: var(--white);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all .2s ease;
  display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.news-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.news-cat {
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: rgba(124,58,237,0.08);
  padding: 4px 12px; border-radius: 999px;
}
.news-date { font-size: 13px; color: var(--text-weak); }
.news-card h3 {
  font-size: 18px; font-weight: 600; color: var(--text-dark);
  line-height: 1.5; margin-bottom: 10px;
  transition: color .2s ease;
}
.news-card:hover h3 { color: var(--primary); }
.news-card p {
  font-size: 14px; color: var(--text-mid);
  line-height: 1.7; margin-bottom: 18px;
  flex: 1;
}
.news-more {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--primary);
}
.news-more svg { width: 15px; height: 15px; stroke: var(--primary); fill: none; stroke-width: 2.5; }
.news-more:hover { gap: 10px; }
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-weak);
  font-size: 16px;
  padding: 60px 20px;
  background: var(--white);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--white);
  padding: var(--space-section) 0;
}
.faq-head { text-align: center; margin-bottom: 44px; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .2s ease;
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.open { box-shadow: var(--shadow-sm); border-color: rgba(124,58,237,0.3); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 15px; font-weight: 600;
  color: var(--text-dark);
  gap: 16px;
}
.faq-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  border-radius: 50%;
  background: rgba(124,58,237,0.08);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: transform .3s ease;
}
.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  width: 12px; height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transition: transform .3s ease;
}
.faq-icon::after { transform: rotate(90deg); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-item.open .faq-icon::after { transform: rotate(0deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.75;
}

/* ---------- CTA Form ---------- */
.cta-section {
  background: var(--ink) url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  position: relative;
  padding: 96px 0;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(11,11,18,0.92);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -120px; left: -80px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(236,72,153,0.2) 0%, transparent 60%);
  border-radius: 50%;
}
.cta-wrap {
  position: relative; z-index: 2;
  display: flex; gap: 60px; align-items: center;
}
.cta-info { flex: 1; }
.cta-info h2 { font-size: 34px; font-weight: 700; color: var(--text-on-dark); line-height: 1.3; margin-bottom: 20px; }
.cta-info p { color: var(--text-on-dark-2); font-size: 15px; line-height: 1.8; margin-bottom: 28px; max-width: 440px; }
.cta-info ul { list-style: none; }
.cta-info ul li {
  display: flex; align-items: center; gap: 12px;
  color: var(--text-on-dark-2);
  font-size: 14px;
  margin-bottom: 12px;
}
.cta-info ul li::before {
  content: '✓';
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 20px; height: 20px;
  background: rgba(16,185,129,0.2);
  color: var(--green);
  border-radius: 50%;
  font-size: 12px; font-weight: 700;
  flex-shrink: 0;
}
.cta-form {
  flex: 1;
  background: var(--white);
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 24px 64px rgba(124,58,237,0.2);
}
.cta-form h3 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.cta-form .form-sub { font-size: 13px; color: var(--text-weak); margin-bottom: 28px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-dark); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 16px;
  background: var(--paper);
  transition: all .2s ease;
  outline: none;
}
.form-group textarea { height: 90px; padding: 12px 16px; resize: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
  background: #fff;
}
.form-submit {
  width: 100%; height: 52px;
  background: var(--gradient);
  color: #fff;
  border: none; border-radius: 999px;
  font-size: 16px; font-weight: 600;
  transition: all .2s ease;
  margin-top: 8px;
}
.form-submit:hover { filter: brightness(1.08); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.privacy-note { font-size: 12px; color: var(--text-weak); text-align: center; margin-top: 16px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  padding: 72px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { font-size: 22px; margin-bottom: 16px; display: inline-block; }
.footer-brand p { font-size: 14px; color: var(--text-on-dark-3); line-height: 1.7; max-width: 260px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-on-dark); margin-bottom: 20px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 14px; color: var(--text-on-dark-2); transition: color .2s ease; }
.footer-col ul a:hover { color: var(--cyan); }
.footer-col ul.contact li { display: flex; align-items: center; gap: 10px; color: var(--text-on-dark-2); font-size: 14px; }
.footer-col ul.contact li svg { width: 18px; height: 18px; stroke: var(--primary-light); fill: none; stroke-width: 2; flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  text-align: center;
}
.footer-bottom p { font-size: 12px; color: var(--text-on-dark-3); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero { padding: 140px 0 80px; }
  .hero h1 { font-size: 44px; }
  .hero .container { flex-direction: column; gap: 48px; }
  .hero-right { width: 100%; max-width: 560px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  :root { --space-section: 56px; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 120px 0 64px; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 15px; }
  .hero-cards { grid-template-columns: 1fr 1fr; }
  .hero-card .num { font-size: 30px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-card { padding: 24px 20px; }
  .stat-card .stat-num { font-size: 36px; }
  .services-grid { grid-template-columns: 1fr; }
  .compare-wrap { flex-direction: column; gap: 40px; }
  .compare-left h2 { font-size: 28px; }
  .news-grid { grid-template-columns: 1fr; }
  .cta-wrap { flex-direction: column; }
  .cta-info h2 { font-size: 28px; }
  .cta-form { padding: 28px 20px; }
  .section-title { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 520px) {
  .hero-cards { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; width: 100%; }
  .hero-btns .btn { width: 100%; }
  .compare-data { grid-template-columns: 1fr 1fr; gap: 12px; }
  .compare-data-item .cd-num { font-size: 30px; }
  .form-submit { font-size: 15px; }
}

/* roulang page: article */
:root {
  --primary: #7C3AED;
  --primary-2: #EC4899;
  --primary-3: #FB923C;
  --gradient: linear-gradient(120deg, #7C3AED, #EC4899, #FB923C);
  --dark-bg: #0B0B12;
  --dark-panel: #131320;
  --light-bg: #FAFAF8;
  --card: #FFFFFF;
  --cyan: #06B6D4;
  --green: #10B981;
  --amber: #F59E0B;
  --text-main: #16151E;
  --text-sub: #4E4C61;
  --text-muted: #8A879C;
  --text-dark-main: #F1F0F7;
  --text-dark-sub: #A9A6BD;
  --border: #E8E6F0;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 12px rgba(11,11,18,0.06);
  --shadow-lg: 0 12px 32px rgba(124,58,237,0.14);
  --container: 1200px;
  --gap: 24px;
  --transition: all 0.2s ease-out;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--light-bg);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
input, select, textarea, button { font-family: inherit; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}
.container.narrow {
  max-width: 760px;
  padding: 0 28px;
}
@media (max-width: 768px) {
  .container, .container.narrow { padding: 0 20px; }
}

.site-header {
  background: var(--dark-bg);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(11,11,18,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark-main);
  letter-spacing: -0.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 38px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dark-sub);
  position: relative;
  padding: 8px 0;
  letter-spacing: 0.02em;
  transition: color 0.2s ease-out;
}
.nav-links a:hover {
  color: var(--cyan);
}
.nav-links a.active {
  color: var(--text-dark-main);
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 20px;
  height: 3px;
  border-radius: 999px;
  background: var(--gradient);
  transform: translateX(-50%);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--gradient);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124,58,237,0.28);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  padding: 0 10px;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--text-dark-main);
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(11,11,18,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-dark-sub);
  padding: 14px 28px;
  transition: var(--transition);
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--text-dark-main); }
.mobile-menu a.active { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.mobile-menu .mobile-cta {
  margin-top: 16px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--gradient);
  border-radius: 999px;
  -webkit-text-fill-color: #fff;
}
.mobile-menu-close {
  position: absolute;
  top: 24px;
  right: 28px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  background: transparent;
  color: var(--text-dark-main);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

/* 面包屑 */
.breadcrumb-wrap {
  background: var(--dark-bg);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 22px 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-dark-sub);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-dark-sub);
  transition: var(--transition);
}
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { color: rgba(255,255,255,0.3); font-weight: 700; }
.breadcrumb .current {
  color: var(--text-dark-main);
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文章头部 */
.article-header-wrap {
  background: var(--dark-bg);
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}
.article-header-wrap::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.22), transparent 70%);
  pointer-events: none;
}
.article-header-wrap::after {
  content: "";
  position: absolute;
  bottom: -140px;
  left: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(236,72,153,0.16), transparent 70%);
  pointer-events: none;
}
.article-header {
  position: relative;
  z-index: 1;
}
.article-header .container.narrow {
  max-width: 860px;
}
.article-header .article-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-3);
  background: rgba(251,146,60,0.12);
  border: 1px solid rgba(251,146,60,0.3);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.article-header h1 {
  font-size: 42px;
  font-weight: 800;
  color: var(--text-dark-main);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-dark-sub);
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.article-meta .meta-icon {
  width: 16px;
  height: 16px;
  opacity: 0.6;
}
.article-meta .meta-divider {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
}
@media (max-width: 768px) {
  .article-header-wrap { padding: 48px 0 36px; }
  .article-header h1 { font-size: 30px; }
}

/* 正文 */
.article-body-wrap {
  padding: 56px 0 72px;
  background: var(--light-bg);
}
.article-content {
  color: var(--text-main);
}
.article-content > * {
  margin-bottom: 24px;
}
.article-content p {
  font-size: 16px;
  line-height: 1.9;
  color: #3A3845;
}
.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin: 48px 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  line-height: 1.35;
}
.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-main);
  margin: 36px 0 16px;
  line-height: 1.4;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin: 28px 0 12px;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
.article-content a:hover { color: var(--cyan); }
.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin: 24px 0;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: 8px;
  line-height: 1.85;
  color: #3A3845;
}
.article-content li::marker {
  color: var(--primary);
}
.article-content blockquote {
  position: relative;
  border-left: 4px solid transparent;
  border-image: linear-gradient(180deg, #7C3AED, #EC4899, #FB923C) 1;
  background: #F6F3FD;
  padding: 22px 28px;
  border-radius: 0 16px 16px 0;
  margin: 36px 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3A3845;
}
.article-content blockquote p {
  margin-bottom: 0;
  font-size: 15px;
  color: #3A3845;
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  margin: 36px auto;
  box-shadow: var(--shadow-sm);
}
.article-content figure {
  margin: 36px 0;
  text-align: center;
}
.article-content figure img {
  margin: 0 auto;
}
.article-content figcaption {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: center;
}
.article-content code {
  font-family: "SF Mono", "Fira Code", Consolas, monospace;
  background: #F0EDF8;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
}
.article-content pre {
  background: var(--dark-panel);
  color: var(--text-dark-main);
  padding: 24px;
  border-radius: 16px;
  overflow-x: auto;
  margin: 32px 0;
  font-size: 14px;
  line-height: 1.7;
}
.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 15px;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 14px 18px;
  text-align: left;
}
.article-content th {
  background: #F6F3FD;
  font-weight: 600;
  color: var(--text-main);
}
.article-content hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

.article-empty {
  text-align: center;
  padding: 100px 20px;
  background: var(--card);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
}
.article-empty-icon {
  font-size: 52px;
  margin-bottom: 20px;
  opacity: 0.4;
}
.article-empty p {
  font-size: 18px;
  color: var(--text-sub);
  margin-bottom: 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 30px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  line-height: 1.2;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(124,58,237,0.28);
}
.btn-outline {
  background: transparent;
  color: var(--text-dark-main);
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* 相关推荐 */
.related-section {
  background: var(--card);
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}
.section-title .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
  display: block;
}
.related-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}
.related-cover {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--dark-panel);
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease-out;
}
.related-card:hover .related-cover img {
  transform: scale(1.04);
}
.related-info {
  padding: 22px 24px 24px;
}
.related-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 10px;
  transition: var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover .related-info h3 { color: var(--primary); }
.related-date {
  font-size: 13px;
  color: var(--text-muted);
}
@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .related-grid { grid-template-columns: 1fr; }
}

/* CTA区 */
.cta-section {
  background: var(--dark-bg);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.28), transparent 70%);
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(251,146,60,0.18), transparent 70%);
}
.cta-card {
  position: relative;
  z-index: 1;
  background: var(--card);
  border-radius: 28px;
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.2);
}
.cta-left .cta-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(124,58,237,0.08);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.cta-left h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 14px;
}
.cta-left p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 480px;
}
.cta-btns {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}
.cta-btns .btn-primary {
  padding: 15px 38px;
  font-size: 15px;
}
.cta-btns .btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 38px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  border: 1.5px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.cta-btns .btn-outline-dark:hover {
  border-color: var(--primary);
  color: var(--primary);
}
@media (max-width: 860px) {
  .cta-card { flex-direction: column; text-align: center; padding: 40px 28px; }
  .cta-left p { margin: 0 auto; }
  .cta-btns { flex-direction: column; width: 100%; }
  .cta-btns .btn-primary, .cta-btns .btn-outline-dark { width: 100%; }
}

/* 页脚 */
.site-footer {
  background: var(--dark-bg);
  color: var(--text-dark-sub);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
  display: inline-block;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dark-sub);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark-main);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-dark-sub);
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: var(--cyan);
  padding-left: 4px;
}
.footer-col .contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dark-sub);
  margin-bottom: 14px;
}
.footer-col .contact svg {
  width: 16px;
  height: 16px;
  fill: var(--text-dark-sub);
  flex-shrink: 0;
  margin-top: 3px;
}
.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--text-dark-main); }
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand p { max-width: 100%; }
}

/* roulang page: category1 */
:root {
      --color-bg-dark: #0B0B12;
      --color-bg-surface: #131320;
      --color-bg-light: #FAFAF8;
      --color-bg-card: #FFFFFF;
      --color-primary: #7C3AED;
      --color-secondary: #EC4899;
      --color-accent: #FB923C;
      --color-info: #06B6D4;
      --color-success: #10B981;
      --color-warning: #F59E0B;
      --gradient-main: linear-gradient(120deg, #7C3AED 0%, #EC4899 50%, #FB923C 100%);
      --text-light-strong: #F1F0F7;
      --text-light-mid: #A9A6BD;
      --text-light-dim: #6F6C87;
      --text-dark-strong: #16151E;
      --text-dark-mid: #4E4C61;
      --text-dark-dim: #8A879C;
      --border-light: rgba(255,255,255,0.08);
      --border-mid: #E2E0EA;
      --border-soft: rgba(124,58,237,0.35);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 999px;
      --shadow-card: 0 2px 12px rgba(11,11,18,0.06);
      --shadow-hover: 0 12px 32px rgba(124,58,237,0.14);
      --container-w: 1200px;
      --section-pad: 84px;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--color-bg-light);
      color: var(--text-dark-strong);
      font-size: 15px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; }
    ul, ol { list-style: none; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    h1, h2, h3, h4 { line-height: 1.3; }

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

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11,11,18,0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-light);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      position: relative;
      z-index: 2;
    }
    .logo {
      font-size: 21px;
      font-weight: 800;
      letter-spacing: 0.02em;
      color: #fff;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }
    .logo span {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    .nav-links a {
      color: var(--text-light-mid);
      font-size: 14px;
      font-weight: 500;
      position: relative;
      padding: 10px 0;
      transition: color 200ms ease-out;
    }
    .nav-links a:hover { color: #fff; }
    .nav-links a.active { color: #fff; }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: 2px;
      width: 20px;
      height: 3px;
      background: var(--gradient-main);
      border-radius: var(--radius-pill);
    }
    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 22px;
      border-radius: var(--radius-pill);
      background: var(--gradient-main);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      transition: all 200ms ease-out;
      box-shadow: 0 2px 10px rgba(124,58,237,0.3);
    }
    .header-cta:hover {
      transform: translateY(-2px);
      filter: brightness(1.06);
      box-shadow: var(--shadow-hover);
    }
    .hamburger {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      background: transparent;
      cursor: pointer;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
    }
    .hamburger span {
      width: 20px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: transform 200ms ease-out, opacity 200ms ease-out;
    }
    .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: rgba(11,11,18,0.97);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-light);
      padding: 24px;
      z-index: 99;
    }
    .mobile-menu.open { display: block; }
    .mobile-nav-links { display: grid; gap: 8px; }
    .mobile-nav-links a {
      display: block;
      padding: 14px 16px;
      border-radius: 14px;
      color: var(--text-light-mid);
      font-size: 16px;
      font-weight: 500;
      background: transparent;
      transition: all 200ms ease-out;
    }
    .mobile-nav-links a:hover { background: rgba(124,58,237,0.12); color: #fff; }
    .mobile-nav-links a.active { background: rgba(124,58,237,0.16); color: #fff; }

    /* ===== Buttons ===== */
    .btn-primary, .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 600;
      transition: all 200ms ease-out;
      cursor: pointer;
    }
    .btn-primary {
      background: var(--gradient-main);
      color: #fff;
      box-shadow: 0 4px 18px rgba(124,58,237,0.25);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      filter: brightness(1.06);
      box-shadow: var(--shadow-hover);
    }
    .btn-ghost {
      background: transparent;
      color: var(--text-light-mid);
      border: 1px solid rgba(255,255,255,0.25);
    }
    .btn-ghost:hover { color: #fff; border-color: #fff; }
    .btn-ghost-light {
      background: transparent;
      color: var(--text-dark-strong);
      border: 1px solid #C8C4D4;
    }
    .btn-ghost-light:hover { border-color: var(--color-primary); color: var(--color-primary); }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      padding: 100px 0 88px;
      background: var(--color-bg-dark);
      background-image: linear-gradient(to right, rgba(11,11,18,0.88), rgba(11,11,18,0.70)), url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
    }
    .page-hero-content { max-width: 780px; position: relative; z-index: 1; }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 18px;
      border-radius: var(--radius-pill);
      background: rgba(124,58,237,0.14);
      border: 1px solid var(--border-soft);
      color: #C4A8FF;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.03em;
    }
    .hero-tag::before {
      content: '';
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--color-success);
      box-shadow: 0 0 8px rgba(16,185,129,0.6);
    }
    .page-hero h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      color: #fff;
      margin: 26px 0 18px;
      letter-spacing: -0.01em;
    }
    .page-hero h1 .grad-text {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .page-hero p {
      font-size: 17px;
      color: var(--text-light-mid);
      line-height: 1.8;
      max-width: 620px;
    }
    .hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 44px;
      padding-top: 28px;
      border-top: 1px solid var(--border-light);
      max-width: 640px;
    }
    .hero-meta-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 16px;
      border-radius: var(--radius-pill);
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--border-light);
    }
    .hero-meta-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-info); }
    .hero-meta-item .dot.green { background: var(--color-success); }
    .hero-meta-item .dot.amber { background: var(--color-warning); }
    .hero-meta-item span { font-size: 13px; color: var(--text-light-mid); }

    /* ===== Section shared ===== */
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      background: rgba(124,58,237,0.08);
      color: var(--color-primary);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.04em;
    }
    .section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
    .section-head h2 { font-size: 34px; font-weight: 700; margin: 16px 0 12px; color: var(--text-dark-strong); }
    .section-head p { color: var(--text-dark-mid); font-size: 16px; line-height: 1.7; }
    .section-head.light h2 { color: #fff; }
    .section-head.light p { color: var(--text-light-mid); }

    /* ===== Intro ===== */
    .intro-section { padding: var(--section-pad) 0; background: var(--color-bg-light); }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .intro-media { position: relative; }
    .intro-media::before {
      content: '';
      position: absolute;
      top: -20px;
      left: -20px;
      width: 140px;
      height: 140px;
      background: var(--gradient-main);
      border-radius: 50%;
      opacity: 0.12;
      z-index: 0;
      filter: blur(20px);
    }
    .intro-media img {
      position: relative;
      z-index: 1;
      width: 100%;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      object-fit: cover;
    }
    .intro-content { position: relative; z-index: 2; }
    .intro-content h2 { font-size: 32px; font-weight: 700; margin: 16px 0 16px; color: var(--text-dark-strong); }
    .intro-content p { color: var(--text-dark-mid); font-size: 15px; line-height: 1.85; }
    .check-list { margin: 26px 0 32px; display: grid; gap: 14px; }
    .check-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: var(--text-dark-strong);
    }
    .check-list li::before {
      content: '✓';
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: var(--gradient-main);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      margin-top: 2px;
    }

    /* ===== Steps ===== */
    .steps-section { padding: var(--section-pad) 0; background: var(--color-bg-dark); }
    .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .step-card {
      background: var(--color-bg-surface);
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 34px 26px;
      transition: border-color 200ms ease-out, transform 200ms ease-out, box-shadow 200ms ease-out;
      position: relative;
      overflow: hidden;
    }
    .step-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--gradient-main);
      opacity: 0;
      transition: opacity 200ms ease-out;
    }
    .step-card:hover { transform: translateY(-4px); border-color: var(--border-soft); box-shadow: var(--shadow-hover); }
    .step-card:hover::before { opacity: 1; }
    .step-num {
      display: block;
      font-size: 42px;
      font-weight: 800;
      background: var(--gradient-main);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      line-height: 1;
      margin-bottom: 22px;
    }
    .step-card h3 { color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 12px; }
    .step-card p { color: var(--text-light-mid); font-size: 14px; line-height: 1.75; }

    /* ===== Tips ===== */
    .tips-section { padding: var(--section-pad) 0; background: var(--color-bg-light); }
    .tips-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .tip-card {
      background: var(--color-bg-card);
      border-radius: 20px;
      padding: 34px;
      box-shadow: var(--shadow-card);
      transition: all 200ms ease-out;
      border: 1px solid transparent;
    }
    .tip-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); border-color: rgba(124,58,237,0.18); }
    .tip-icon {
      width: 50px;
      height: 50px;
      border-radius: 14px;
      background: rgba(124,58,237,0.10);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      color: var(--color-primary);
    }
    .tip-icon svg { width: 26px; height: 26px; }
    .tip-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: var(--text-dark-strong); }
    .tip-card p { font-size: 14px; color: var(--text-dark-mid); line-height: 1.75; }

    /* ===== FAQ ===== */
    .faq-section { padding: var(--section-pad) 0; background: var(--color-bg-dark); }
    .faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 16px; }
    .faq-item {
      background: var(--color-bg-surface);
      border: 1px solid var(--border-light);
      border-radius: 18px;
      overflow: hidden;
      transition: border-color 200ms ease-out;
    }
    .faq-item[open] { border-color: var(--border-soft); }
    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 26px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-light-strong);
      transition: color 200ms ease-out;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: '+';
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      width: 30px;
      height: 30px;
      border-radius: 50%;
      background: rgba(124,58,237,0.18);
      color: #C4A8FF;
      font-size: 20px;
      font-weight: 400;
      transition: transform 250ms ease-out, background 200ms ease-out;
    }
    .faq-item[open] summary::after { transform: rotate(45deg); background: rgba(124,58,237,0.3); }
    .faq-answer {
      padding: 0 26px 24px;
      color: var(--text-light-mid);
      font-size: 14px;
      line-height: 1.8;
    }
    .faq-answer p { margin: 0; }

    /* ===== CTA ===== */
    .cta-section {
      padding: var(--section-pad) 0;
      background: var(--color-bg-dark);
      position: relative;
      overflow: hidden;
      border-top: 1px solid var(--border-light);
    }
    .cta-section::before,
    .cta-section::after {
      content: '';
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: var(--gradient-main);
      filter: blur(130px);
      opacity: 0.18;
      pointer-events: none;
    }
    .cta-section::before { top: -160px; right: -120px; }
    .cta-section::after { bottom: -180px; left: -140px; }
    .cta-box { position: relative; z-index: 1; text-align: center; max-width: 680px; margin: 0 auto; }
    .cta-box h2 { color: #fff; font-size: 36px; font-weight: 800; }
    .cta-box p { color: var(--text-light-mid); margin: 18px auto 34px; font-size: 16px; line-height: 1.8; max-width: 560px; }
    .cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--color-bg-dark);
      padding: 64px 0 28px;
      border-top: 1px solid rgba(255,255,255,0.04);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
    }
    .footer-brand .logo { font-size: 22px; margin-bottom: 16px; }
    .footer-brand p { font-size: 14px; color: var(--text-light-mid); line-height: 1.8; max-width: 300px; }
    .footer-col h4 { font-size: 15px; color: var(--text-light-strong); font-weight: 600; margin-bottom: 20px; }
    .footer-col ul { display: grid; gap: 12px; }
    .footer-col ul li a { font-size: 14px; color: var(--text-light-mid); transition: color 200ms ease-out; }
    .footer-col ul li a:hover { color: var(--color-info); }
    .footer-col .contact li { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--text-light-mid); }
    .footer-col .contact svg { width: 18px; height: 18px; fill: rgba(255,255,255,0.4); flex-shrink: 0; }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid var(--border-light);
      text-align: center;
    }
    .footer-bottom p { font-size: 12px; color: var(--text-light-dim); letter-spacing: 0.02em; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .nav-links { gap: 24px; }
      .intro-grid { gap: 40px; }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
      :root { --section-pad: 56px; }
      .nav-links, .header-cta { display: none; }
      .hamburger { display: flex; }
      .page-hero { padding: 64px 0 56px; }
      .page-hero h1 { font-size: 32px; }
      .page-hero p { font-size: 15px; }
      .hero-actions { flex-direction: column; width: 100%; }
      .hero-actions .btn-primary, .hero-actions .btn-ghost { width: 100%; }
      .hero-meta { gap: 10px; }
      .hero-meta-item { width: 100%; }
      .intro-grid { grid-template-columns: 1fr; gap: 32px; }
      .intro-content h2 { font-size: 26px; }
      .steps-grid { grid-template-columns: 1fr; gap: 16px; }
      .tips-grid { grid-template-columns: 1fr; gap: 16px; }
      .section-head h2 { font-size: 26px; }
      .cta-box h2 { font-size: 28px; }
      .cta-actions { flex-direction: column; width: 100%; }
      .cta-actions .btn-primary, .cta-actions .btn-ghost { width: 100%; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-brand p { max-width: 100%; }
      .faq-item summary { padding: 18px 20px; font-size: 15px; }
      .faq-answer { padding: 0 20px 20px; }
    }
    @media (max-width: 520px) {
      .page-hero-content .hero-tag { font-size: 12px; padding: 6px 12px; }
      .page-hero h1 { font-size: 28px; }
      .intro-grid { gap: 24px; }
      .intro-media img { border-radius: 18px; }
      .tip-card { padding: 24px; }
      .step-card { padding: 26px 20px; }
    }

/* roulang page: category2 */
/* ========== Design Variables ========== */
:root {
  --primary: #7C3AED;
  --secondary: #EC4899;
  --tertiary: #FB923C;
  --gradient: linear-gradient(120deg, #7C3AED 0%, #EC4899 55%, #FB923C 100%);
  --bg-dark: #0B0B12;
  --bg-panel: #131320;
  --bg-light: #FAFAF8;
  --card-white: #FFFFFF;
  --cyan: #06B6D4;
  --green: #10B981;
  --amber: #F59E0B;
  --text-dark: #16151E;
  --text-sec: #4E4C61;
  --text-weak: #8A879C;
  --text-light: #F1F0F7;
  --text-light-sec: #A9A6BD;
  --text-light-weak: #6F6C87;
  --border-light: #E9E7F0;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow: 0 2px 12px rgba(11, 11, 18, 0.06);
  --shadow-hover: 0 12px 32px rgba(124, 58, 237, 0.14);
  --container-width: 1200px;
  --section-padding: 90px;
  --transition: all 0.2s ease-out;
}

/* ========== Reset & Base ========== */
*, *::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-light);
  color: var(--text-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font: inherit; border: none; outline: none; background: none; }

/* ========== Container ========== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ========== Section ========== */
.section { padding: var(--section-padding) 0; }
.section--light { background: var(--bg-light); }
.section--white { background: #FFFFFF; }
.section--dark { background: var(--bg-dark); }

.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head .section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--primary);
  background: rgba(124, 58, 237, 0.08);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-dark);
  margin-bottom: 14px;
}
.section-head p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-sec);
}
.section-head--dark .section-eyebrow { background: rgba(255, 255, 255, 0.08); color: #fff; }
.section-head--dark h2 { color: var(--text-light); }
.section-head--dark p { color: var(--text-light-sec); }

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  background: var(--gradient);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.38);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  background: transparent;
  color: var(--text-light);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
  cursor: pointer;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: #fff;
  background: rgba(124, 58, 237, 0.1);
}
.btn-outline--dark {
  color: var(--text-dark);
  border-color: rgba(22, 21, 30, 0.2);
}
.btn-outline--dark:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(124, 58, 237, 0.05);
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  border-radius: 999px;
  background: var(--gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
}
.btn-nav:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 11, 18, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.01em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  position: relative;
  color: var(--text-light-sec);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
}
.hamburger:hover { background: rgba(255, 255, 255, 0.08); }
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-light);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(11, 11, 18, 0.97);
  backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}
.mobile-close:hover { background: rgba(255, 255, 255, 0.14); }
.mobile-menu nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.mobile-menu nav a {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-light-sec);
  transition: color 0.2s;
}
.mobile-menu nav a:hover { color: #fff; }
.mobile-menu nav a.active {
  color: #fff;
  position: relative;
}
.mobile-menu nav a.active::after {
  content: "";
  display: block;
  margin: 6px auto 0;
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient);
}

/* ========== Hero ========== */
.hero {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 110px 0 90px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 480px;
  height: 520px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.3), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -25%;
  left: -8%;
  width: 420px;
  height: 460px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.22), transparent 70%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.hero-content h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}
.hero-content h1 .grad-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content p.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-light-sec);
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Stats */
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-badge {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 24px 20px;
  position: relative;
  transition: var(--transition);
}
.stat-badge:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-3px);
}
.stat-dot {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.stat-dot--green { background: var(--green); box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
.stat-dot--cyan { background: var(--cyan); box-shadow: 0 0 8px rgba(6, 182, 212, 0.5); }
.stat-dot--amber { background: var(--amber); box-shadow: 0 0 8px rgba(245, 158, 11, 0.5); }
.stat-number {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-number--cyan {
  background: none;
  -webkit-text-fill-color: var(--cyan);
  color: var(--cyan);
}
.stat-label {
  font-size: 13px;
  color: var(--text-light-sec);
  letter-spacing: 0.02em;
}

/* ========== Feature Cards (Two Columns) ========== */
.feature-cards { background: var(--bg-light); }
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.feature-card {
  background: var(--card-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(11, 11, 18, 0.04);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.feature-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 11, 18, 0.35), transparent 60%);
}
.feature-card__badge {
  position: absolute;
  left: 20px;
  bottom: 16px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
}
.feature-card__badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.feature-card__body {
  padding: 32px 32px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
}
.feature-card__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}
.feature-card__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sec);
  margin-bottom: 20px;
}
.feature-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  background: rgba(124, 58, 237, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
}
.feature-card__meta {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.feature-card__meta .meta-value {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.feature-card__meta .meta-label {
  font-size: 13px;
  color: var(--text-weak);
}

/* ========== Process ========== */
.process { background: #FFFFFF; }
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  background: var(--bg-light);
  border-radius: 20px;
  padding: 32px 24px;
  position: relative;
  border: 1px solid rgba(11, 11, 18, 0.03);
  transition: var(--transition);
}
.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.process-step__num {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.process-step__num::before {
  content: "0" counter(step);
  counter-increment: step;
}
.process-step h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.process-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-sec);
}

/* ========== Compare + Stats ========== */
.compare { background: var(--bg-light); }
.compare-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}
.compare-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 36px;
}
.compare-card .compare-card__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-dark);
}
.compare-table {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.compare-row {
  display: grid;
  grid-template-columns: 90px 1fr 1fr;
  align-items: center;
  background: var(--bg-light);
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 14px;
}
.compare-row + .compare-row {
  margin-top: 0;
}
.compare-row .row-label {
  color: var(--text-weak);
  font-weight: 500;
}
.compare-row .row-item {
  font-weight: 600;
  color: var(--text-dark);
  padding: 2px 10px;
  border-radius: 8px;
  text-align: center;
}
.compare-row .row-item--highlight {
  background: var(--gradient);
  color: #fff;
}

/* Stats Row */
.stats-panel {
  background: var(--bg-dark);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  color: var(--text-light);
}
.stats-panel h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}
.stats-panel > p {
  color: var(--text-light-sec);
  font-size: 14px;
  margin-bottom: 32px;
}
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.stats-item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 20px 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  transition: var(--transition);
}
.stats-item:hover {
  background: rgba(255, 255, 255, 0.1);
}
.stats-item .stats-num {
  font-size: 34px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stats-item .stats-label {
  font-size: 13px;
  color: var(--text-light-sec);
  margin-top: 6px;
}

/* ========== Quote ========== */
.quote-section {
  background: var(--bg-dark);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.quote-section::before {
  content: "";
  position: absolute;
  top: -40%;
  left: 30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.18), transparent 70%);
}
.quote-block {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: 0 32px;
}
.quote-block blockquote {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text-light);
  position: relative;
  padding: 0 0 20px;
}
.quote-block blockquote::before {
  content: "“";
  display: block;
  font-size: 64px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.quote-block .quote-source {
  font-size: 14px;
  color: var(--text-light-weak);
  letter-spacing: 0.04em;
  margin-top: 16px;
}

/* ========== FAQ ========== */
.faq { background: var(--bg-light); }
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #FFFFFF;
  border-radius: 18px;
  border: 1px solid rgba(11, 11, 18, 0.05);
  box-shadow: 0 2px 8px rgba(11, 11, 18, 0.03);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  transition: color 0.2s;
  width: 100%;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid rgba(124, 58, 237, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.25s, background 0.25s, color 0.25s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}
.faq-item.active .faq-answer { grid-template-rows: 1fr; }
.faq-answer__inner { overflow: hidden; }
.faq-answer__inner p {
  padding: 0 24px 22px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-sec);
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}

/* ========== CTA ========== */
.cta-section {
  background: var(--bg-dark);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -10%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.16), transparent 70%);
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.22), transparent 70%);
}
.cta-card {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 28px;
  padding: 56px 48px;
  text-align: center;
}
.cta-card h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.cta-card p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-light-sec);
  max-width: 560px;
  margin: 0 auto 32px;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.site-footer {
  background: #08080F;
  color: var(--text-light-sec);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 48px;
  padding-bottom: 50px;
}
.footer-brand .logo {
  font-size: 22px;
  margin-bottom: 16px;
  display: inline-block;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-light-weak);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-light-sec);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--cyan); }
.footer-col ul.contact li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-light-sec);
}
.footer-col ul.contact li svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--primary);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  margin-top: 2px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 12px;
  color: var(--text-light-weak);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-content {
    text-align: center;
  }
  .hero-content p.hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .process-steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 28px; }

  .nav-links { display: none; }
  .btn-nav { display: none; }
  .hamburger { display: flex; }

  .hero {
    padding: 80px 0 60px;
  }
  .hero-content h1 {
    font-size: 34px;
  }
  .hero-content p.hero-sub {
    font-size: 16px;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-number {
    font-size: 36px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .feature-card__body {
    padding: 24px;
  }

  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .process-step {
    padding: 24px 18px;
  }

  .compare-card {
    padding: 24px;
  }
  .compare-row {
    grid-template-columns: 70px 1fr 1fr;
    padding: 12px 12px;
    font-size: 13px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stats-panel {
    padding: 28px 20px;
  }

  .quote-block blockquote {
    font-size: 18px;
  }

  .cta-card {
    padding: 40px 24px;
  }
  .cta-card h2 {
    font-size: 26px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline {
    justify-content: center;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-outline {
    justify-content: center;
  }
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --purple: #7C3AED;
            --pink: #EC4899;
            --orange: #FB923C;
            --brand-grad: linear-gradient(120deg, #7C3AED, #EC4899, #FB923C);
            --dark: #0B0B12;
            --dark-panel: #131320;
            --light: #FAFAF8;
            --white: #FFFFFF;
            --cyan: #06B6D4;
            --green: #10B981;
            --amber: #F59E0B;
            --text-main: #16151E;
            --text-sub: #4E4C61;
            --text-weak: #8A879C;
            --text-light: #F1F0F7;
            --text-light-sub: #A9A6BD;
            --text-light-weak: #6F6C87;
            --border: #E2E0EA;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow: 0 2px 12px rgba(11, 11, 18, .06);
            --shadow-hover: 0 12px 32px rgba(124, 58, 237, .14);
            --spacer: 88px;
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--light);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease-out;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            font-weight: 700;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 13px 30px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all .2s ease-out;
            border: 1px solid transparent;
            line-height: 1;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand-grad);
            color: #fff;
            box-shadow: 0 4px 18px rgba(124, 58, 237, .25);
        }

        .btn-primary:hover {
            filter: brightness(1.06);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 58, 237, .32);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-light);
            border-color: rgba(255, 255, 255, .35);
        }

        .btn-secondary:hover {
            border-color: var(--purple);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

        .btn-light {
            background: var(--white);
            color: var(--text-main);
            border-color: transparent;
        }

        .btn-light:hover {
            background: var(--light);
            color: var(--purple);
            transform: translateY(-2px);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 11, 18, .94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            transition: box-shadow .25s ease-out;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(0, 0, 0, .3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            height: 72px;
            gap: 32px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: .5px;
            background: var(--brand-grad);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
            margin-left: auto;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light-sub);
            position: relative;
            padding: 6px 0;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: #fff;
        }

        .nav-links a.active {
            color: #fff;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 999px;
            background: var(--brand-grad);
        }

        .header-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            background: transparent;
            cursor: pointer;
            border-radius: 12px;
            align-items: center;
            margin-left: 8px;
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: all .25s ease-out;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 24px;
            }
        }

        @media (max-width: 860px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: 0;
                height: 100vh;
                width: min(360px, 85vw);
                background: var(--dark-panel);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 20px;
                padding: 40px 24px;
                margin: 0;
                transform: translateX(100%);
                transition: transform .3s ease-out;
                box-shadow: -12px 0 40px rgba(0, 0, 0, .4);
                border-left: 1px solid rgba(255, 255, 255, .06);
                z-index: 1001;
            }

            .nav-links.open {
                transform: translateX(0);
            }

            .nav-links a {
                font-size: 17px;
                padding: 8px 0;
                color: var(--text-light);
            }

            .header-cta {
                margin-left: auto;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-links a.active::after {
                width: 28px;
                height: 3px;
            }
        }

        @media (max-width: 560px) {
            .header-cta {
                display: none;
            }
        }

        /* ===== 页头 Hero ===== */
        .page-hero {
            position: relative;
            background: var(--dark);
            padding: 96px 0 84px;
            color: var(--text-light);
            isolation: isolate;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: .18;
            z-index: -2;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, #0B0B12 25%, rgba(124, 58, 237, .16) 65%, rgba(236, 72, 153, .1) 100%);
            z-index: -1;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124, 58, 237, .14);
            border: 1px solid rgba(124, 58, 237, .3);
            color: var(--text-light);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .05em;
            padding: 7px 16px;
            border-radius: 999px;
            margin-bottom: 24px;
        }

        .hero-tag .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--green);
            box-shadow: 0 0 8px rgba(16, 185, 129, .8);
        }

        .page-hero h1 {
            font-size: 46px;
            line-height: 1.2;
            max-width: 680px;
            margin-bottom: 20px;
            letter-spacing: .01em;
        }

        .page-hero h1 .grad {
            background: var(--brand-grad);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-light-sub);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 52px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, .08);
        }

        .hero-meta-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-meta-item .num {
            font-size: 28px;
            font-weight: 800;
            background: var(--brand-grad);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-meta-item .label {
            font-size: 13px;
            color: var(--text-light-weak);
        }

        @media (max-width: 860px) {
            .page-hero {
                padding: 64px 0 56px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-meta {
                gap: 20px;
                margin-top: 36px;
                padding-top: 24px;
            }
            .hero-meta-item .num {
                font-size: 22px;
            }
        }

        /* ===== 通用版块 ===== */
        .section {
            padding: var(--spacer) 0;
        }

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

        .section-head .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .05em;
            color: var(--purple);
            background: rgba(124, 58, 237, .08);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 52px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
        }

        /* ===== TOC 导读区 ===== */
        .toc-section {
            background: var(--light);
            padding: var(--spacer) 0;
        }

        .toc-grid {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 32px;
            align-items: start;
        }

        .toc-main {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .toc-intro {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .toc-intro h2 {
            font-size: 22px;
            color: var(--text-main);
        }

        .toc-intro p {
            font-size: 14px;
            color: var(--text-sub);
            max-width: 360px;
        }

        .toc-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .toc-nav a {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-sub);
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 16px;
            transition: all .2s ease-out;
        }

        .toc-nav a:hover {
            color: var(--purple);
            border-color: var(--purple);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .08);
        }

        .toc-block {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            border-left: 4px solid transparent;
            transition: border-color .25s ease-out, box-shadow .25s ease-out;
            scroll-margin-top: 90px;
        }

        .toc-block:hover {
            border-left-color: var(--purple);
            box-shadow: var(--shadow-hover);
        }

        .toc-block .toc-block-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 10px;
        }

        .toc-block .toc-num {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--brand-grad);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .toc-block h3 {
            font-size: 19px;
            color: var(--text-main);
        }

        .toc-block p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 10px;
        }

        .toc-block ul {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .toc-block ul li {
            font-size: 13px;
            color: var(--text-sub);
            background: var(--light);
            border-radius: 999px;
            padding: 5px 12px;
            border: 1px solid var(--border);
        }

        /* ===== 右栏摘要卡 ===== */
        .toc-sidebar {
            position: sticky;
            top: 92px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .summary-card {
            background: var(--dark-panel);
            border-radius: var(--radius-lg);
            padding: 24px;
            color: var(--text-light);
            box-shadow: 0 12px 32px rgba(11, 11, 18, .18);
            overflow: hidden;
        }

        .summary-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 20px;
        }

        .summary-card h3 {
            font-size: 17px;
            margin-bottom: 10px;
            color: #fff;
        }

        .summary-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-light-sub);
            margin-bottom: 18px;
        }

        .summary-stats {
            display: flex;
            flex-direction: column;
            gap: 10px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 16px;
        }

        .summary-stats li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 14px;
            color: var(--text-light-sub);
        }

        .summary-stats li strong {
            color: #fff;
            font-size: 16px;
            background: var(--brand-grad);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .summary-contact {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            text-align: center;
        }

        .summary-contact .icon {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: rgba(124, 58, 237, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }

        .summary-contact .icon svg {
            width: 22px;
            height: 22px;
            fill: var(--purple);
        }

        .summary-contact h4 {
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .summary-contact p {
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 16px;
        }

        @media (max-width: 960px) {
            .toc-grid {
                grid-template-columns: 1fr;
            }
            .toc-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .summary-card,
            .summary-contact {
                flex: 1;
                min-width: 260px;
            }
        }

        /* ===== 核心优势 ===== */
        .features-section {
            background: var(--white);
            padding: var(--spacer) 0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid rgba(0, 0, 0, .03);
            transition: all .2s ease-out;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--brand-grad);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .25s ease-out;
        }

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

        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            background: var(--brand-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .feature-icon svg {
            width: 24px;
            height: 24px;
            fill: #fff;
        }

        .feature-card h3 {
            font-size: 17px;
            color: var(--text-main);
            margin-bottom: 8px;
        }

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

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 适用场景 ===== */
        .scenarios-section {
            background: var(--dark);
            padding: var(--spacer) 0;
            color: var(--text-light);
            position: relative;
            overflow: hidden;
        }

        .scenarios-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(124, 58, 237, .25), transparent 70%);
            border-radius: 50%;
        }

        .scenarios-section .section-head h2 {
            color: #fff;
        }

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

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }

        .scenario-card {
            background: var(--dark-panel);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all .2s ease-out;
        }

        .scenario-card:hover {
            transform: translateY(-3px);
            border-color: rgba(124, 58, 237, .5);
            box-shadow: 0 12px 32px rgba(124, 58, 237, .12);
        }

        .scenario-num {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .06em;
            color: var(--purple);
            margin-bottom: 12px;
            display: block;
        }

        .scenario-card h3 {
            font-size: 17px;
            color: #fff;
            margin-bottom: 8px;
        }

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

        @media (max-width: 1024px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 登录流程 ===== */
        .flow-section {
            background: var(--light);
            padding: var(--spacer) 0;
        }

        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .flow-step {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            text-align: center;
            position: relative;
        }

        .flow-step::after {
            content: '→';
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            color: var(--purple);
            z-index: 2;
            font-weight: 300;
        }

        .flow-step:last-child::after {
            display: none;
        }

        .flow-step .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--brand-grad);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 16px rgba(124, 58, 237, .28);
        }

        .flow-step h3 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
                row-gap: 36px;
            }
            .flow-step:nth-child(2)::after {
                display: none;
            }
        }

        @media (max-width: 560px) {
            .flow-grid {
                grid-template-columns: 1fr;
            }
            .flow-step::after {
                display: none !important;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--white);
            padding: var(--spacer) 0;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--light);
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 0, 0, .04);
            overflow: hidden;
            transition: box-shadow .2s ease-out;
        }

        .faq-item.active {
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 58, 237, .2);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: transparent;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            text-align: left;
            transition: color .2s ease-out;
        }

        .faq-question:hover {
            color: var(--purple);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(124, 58, 237, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all .25s ease-out;
            position: relative;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            width: 10px;
            height: 2px;
            background: var(--purple);
            border-radius: 2px;
            transition: all .25s ease-out;
        }

        .faq-icon::after {
            transform: rotate(90deg);
        }

        .faq-item.active .faq-icon {
            background: var(--brand-grad);
        }

        .faq-item.active .faq-icon::before,
        .faq-item.active .faq-icon::after {
            background: #fff;
        }

        .faq-item.active .faq-icon::after {
            transform: rotate(0deg);
        }

        .faq-answer {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows .3s ease-out;
        }

        .faq-item.active .faq-answer {
            grid-template-rows: 1fr;
        }

        .faq-answer-inner {
            overflow: hidden;
        }

        .faq-answer-inner p {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.75;
        }

        @media (max-width: 768px) {
            .faq-question {
                font-size: 14px;
                padding: 18px 16px;
            }
            .faq-answer-inner p {
                padding: 0 16px 18px;
                font-size: 13px;
            }
        }

        /* ===== CTA 转化区 ===== */
        .cta-section {
            background: var(--dark);
            padding: var(--spacer) 0;
            position: relative;
            overflow: hidden;
            color: var(--text-light);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(124, 58, 237, .3), transparent 70%);
            bottom: -100px;
            left: -80px;
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(236, 72, 153, .2), transparent 70%);
            top: -80px;
            right: -60px;
            border-radius: 50%;
        }

        .cta-card {
            max-width: 1000px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            background: var(--dark-panel);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--radius-lg);
            padding: 48px;
            position: relative;
            z-index: 1;
        }

        .cta-copy h2 {
            font-size: 30px;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-copy p {
            font-size: 15px;
            color: var(--text-light-sub);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .cta-points {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .cta-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light-sub);
        }

        .cta-points li .check {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--green);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .cta-points li .check svg {
            width: 11px;
            height: 11px;
            fill: #fff;
        }

        .cta-form {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, .25);
        }

        .cta-form .form-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-sub);
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            height: 48px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0 16px;
            font-size: 14px;
            color: var(--text-main);
            background: var(--light);
            transition: all .2s ease-out;
            width: 100%;
        }

        .form-group textarea {
            height: 88px;
            padding: 12px 16px;
            resize: vertical;
            line-height: 1.5;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--purple);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .12);
            background: #fff;
        }

        .cta-form .btn {
            width: 100%;
            height: 50px;
            margin-top: 4px;
        }

        .form-privacy {
            font-size: 12px;
            color: var(--text-weak);
            text-align: center;
            margin-top: 0;
        }

        @media (max-width: 860px) {
            .cta-card {
                grid-template-columns: 1fr;
                padding: 32px 24px;
                gap: 32px;
            }
            .cta-copy h2 {
                font-size: 24px;
            }
            .cta-form {
                padding: 24px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: var(--text-light-sub);
            padding: 64px 0 0;
            border-top: 1px solid rgba(255, 255, 255, .05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            font-size: 20px;
            display: block;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-light-sub);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-light-sub);
            transition: color .2s ease-out;
        }

        .footer-col ul li a:hover {
            color: var(--cyan);
        }

        .footer-col ul.contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light-sub);
        }

        .footer-col ul.contact li svg {
            width: 17px;
            height: 17px;
            fill: var(--text-light-weak);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .05);
            padding: 24px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-light-weak);
        }

        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 768px) {
            .section-head {
                margin-bottom: 32px;
            }
            .section-head p {
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }
        }