/* roulang page: index */
:root {
  --primary: #2E6FF2;
  --primary-light: #EAF2FF;
  --primary-dark: #244E8C;
  --accent: #F08C00;
  --teal: #17B8A6;
  --text-dark: #1F2A44;
  --text-body: #5C6B8A;
  --text-light: #8A97AD;
  --text-white: #FFFFFF;
  --bg-page: #F7F9FC;
  --bg-card: #FFFFFF;
  --border-card: #E3EAF4;
  --border-line: #EDF1F6;
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-tag: 6px;
  --shadow-card: 0 4px 20px rgba(31,42,68,0.06);
  --shadow-hover: 0 12px 32px rgba(31,42,68,0.12);
  --transition: all 0.2s ease;
  --container-w: 1200px;
  --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
.grid-container { max-width: var(--container-w); margin-left: auto; margin-right: auto; padding-left: 20px; padding-right: 20px; }
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px auto; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 20px;
  padding: 4px 16px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.35;
  margin-bottom: 12px;
}
.section-head p { font-size: 15px; color: var(--text-light); line-height: 1.6; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 12px 24px;
  height: 44px;
  line-height: 1;
  border: 1px solid transparent;
  transition: var(--transition);
  text-align: center;
  vertical-align: middle;
  white-space: nowrap;
}
.btn:focus { outline: none; box-shadow: 0 0 0 2px var(--primary-light), 0 0 0 4px var(--primary); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-primary:active { background: #1a3a6e; transform: translateY(0); box-shadow: none; }
.btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); }
.btn-outline:active { background: #dbe7ff; transform: translateY(0); }
.btn-light { background: #fff; color: var(--primary-dark); }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-1px); }
.btn-sm { height: 36px; padding: 8px 18px; font-size: 13px; border-radius: 6px; }
.btn-lg { height: 48px; padding: 14px 32px; font-size: 15px; }
.text-link { font-size: 14px; color: var(--primary); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: var(--transition); }
.text-link:hover { color: var(--primary-dark); gap: 8px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo .logo-icon {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
}
.brand-logo .logo-text { font-size: 20px; font-weight: 700; color: var(--text-dark); letter-spacing: 0.5px; }
.brand-logo .logo-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 2px;
  letter-spacing: 0.5px;
}
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  padding: 8px 16px;
  border-radius: var(--radius-tag);
  transition: var(--transition);
}
.nav-link:hover { background: var(--primary-light); color: var(--primary-dark); }
.nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 20px;
  padding: 4px 14px;
  background: var(--primary-light);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  position: relative;
  display: inline-block;
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(23,184,166,0.5); }
  70% { box-shadow: 0 0 0 6px rgba(23,184,166,0); }
  100% { box-shadow: 0 0 0 0 rgba(23,184,166,0); }
}
.nav-toggle { display: none; background: none; border: none; width: 42px; height: 42px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border-radius: 8px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  background: var(--primary-light);
  padding: 72px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -60px; right: -60px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(46,111,242,0.08);
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -40px; left: -40px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(23,184,166,0.06);
}
.hero .grid-container { position: relative; z-index: 2; }
.hero-content { padding-right: 24px; }
.hero-flag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(46,111,242,0.2);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 20px;
}
.hero-flag i { font-size: 12px; }
.hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-sub {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-visual img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4/3;
  object-fit: cover;
  background: #dbe4f0;
}
.hero-float-card {
  position: absolute;
  bottom: 20px;
  left: -24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-hover);
  padding: 14px 20px;
  display: flex;
  gap: 20px;
  border: 1px solid var(--border-card);
}
.float-stats { display: flex; flex-direction: column; gap: 2px; }
.float-stats strong { font-size: 18px; font-weight: 700; color: var(--text-dark); }
.float-stats span { font-size: 12px; color: var(--text-light); }

/* ===== Features ===== */
.features { background: #fff; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 28px;
  height: 100%;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
}
.feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  margin-bottom: 18px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon { background: var(--primary); color: #fff; }
.feature-card h3 { font-size: 17px; font-weight: 600; color: var(--text-dark); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-body); line-height: 1.6; margin-bottom: 14px; }
.feature-card .text-link { font-size: 13px; }
.feature-card.wide {
  background: linear-gradient(135deg, var(--primary-light) 0%, #f7fbff 100%);
  border-color: rgba(46,111,242,0.15);
  padding: 32px 36px;
}
.feature-card.wide .feature-card-inner { display: flex; align-items: center; gap: 24px; }
.feature-card.wide .feature-icon { width: 52px; height: 52px; flex-shrink: 0; margin-bottom: 0; margin-right: 8px; }
.feature-card.wide h3 { font-size: 18px; margin-bottom: 6px; }
.feature-card.wide p { margin-bottom: 0; max-width: 680px; }

/* ===== Scenarios ===== */
.scenarios { background: var(--bg-page); }
.scenario-block { display: flex; align-items: center; gap: 48px; margin-bottom: 72px; }
.scenario-block:last-child { margin-bottom: 0; }
.scenario-block.reverse { flex-direction: row-reverse; }
.scenario-image { flex: 0 0 46%; }
.scenario-image img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  aspect-ratio: 4/3;
  object-fit: cover;
  background: #e2e9f2;
  transition: var(--transition);
}
.scenario-image img:hover { box-shadow: var(--shadow-hover); }
.scenario-text { flex: 1; }
.scenario-text .step-index { font-size: 13px; font-weight: 600; color: var(--primary); letter-spacing: 2px; margin-bottom: 10px; }
.scenario-text h3 { font-size: clamp(18px, 2vw, 22px); font-weight: 600; color: var(--text-dark); line-height: 1.4; margin-bottom: 12px; }
.scenario-text p { font-size: 15px; color: var(--text-body); line-height: 1.7; margin-bottom: 16px; }
.scenario-text .text-link { font-size: 14px; }

/* ===== Cases ===== */
.cases { background: #fff; }
.stats-row { margin-bottom: 56px; text-align: center; }
.stat-item { padding: 24px 16px; }
.stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  display: block;
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-item:nth-child(even) .stat-num { color: var(--teal); }
.stat-label { font-size: 13px; color: var(--text-light); }
.case-cards .case-card {
  background: var(--bg-page);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 28px;
  height: 100%;
  transition: var(--transition);
  position: relative;
}
.case-cards .case-card:hover { background: var(--primary-light); border-color: rgba(46,111,242,0.2); transform: translateY(-2px); }
.case-card .quote-icon { font-size: 18px; color: var(--primary); margin-bottom: 12px; opacity: 0.5; }
.case-card p { font-size: 15px; color: var(--text-body); line-height: 1.7; margin-bottom: 16px; }
.case-card .case-user { font-size: 13px; color: var(--text-light); display: flex; align-items: center; gap: 8px; }
.case-card .case-user::before { content: ""; width: 24px; height: 2px; background: var(--teal); border-radius: 2px; }

/* ===== Pricing ===== */
.pricing { background: var(--bg-page); }
.pricing-card {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: var(--shadow-card);
  text-align: center;
  transition: var(--transition);
  position: relative;
  height: 100%;
}
.pricing-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 8px 32px rgba(46,111,242,0.14);
  transform: translateY(-12px);
  padding-top: 44px;
}
.pricing-card.featured:hover { transform: translateY(-14px); }
.recommend-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  padding: 4px 16px;
  letter-spacing: 1px;
  white-space: nowrap;
}
.pricing-name { font-size: 16px; font-weight: 600; color: var(--text-dark); margin-bottom: 12px; }
.pricing-price { font-size: 36px; font-weight: 700; color: var(--text-dark); line-height: 1; margin-bottom: 4px; }
.pricing-price sup { font-size: 14px; font-weight: 500; color: var(--text-light); vertical-align: top; }
.pricing-price span { font-size: 14px; font-weight: 400; color: var(--text-light); }
.pricing-desc { font-size: 13px; color: var(--text-light); margin-bottom: 24px; }
.pricing-list { text-align: left; margin-bottom: 28px; }
.pricing-list li { display: flex; align-items: flex-start; gap: 10px; padding: 5px 0; font-size: 14px; color: var(--text-body); }
.pricing-list li i { color: var(--teal); font-size: 14px; margin-top: 3px; flex-shrink: 0; }
.pricing-card .btn { width: 100%; }

/* ===== News ===== */
.news { background: #fff; }
.news-card {
  background: var(--bg-page);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 24px;
  height: 100%;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover { background: var(--primary-light); border-color: rgba(46,111,242,0.2); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.news-card-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.news-cat {
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 4px;
  padding: 2px 10px;
}
.news-date { font-size: 12px; color: var(--text-light); }
.news-card h3 { font-size: 17px; font-weight: 600; color: var(--text-dark); line-height: 1.4; margin-bottom: 10px; }
.news-card h3 a { color: inherit; }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--text-body); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.news-more { font-size: 13px; color: var(--primary); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; }
.news-empty {
  grid-column: 1 / -1;
  background: var(--bg-page);
  border: 1px dashed var(--border-card);
  border-radius: var(--radius-card);
  padding: 48px;
  text-align: center;
  font-size: 14px;
  color: var(--text-light);
}

/* ===== CTA ===== */
.cta-banner { background: var(--primary-light); padding: 64px 0; text-align: center; position: relative; overflow: hidden; }
.cta-banner::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(46,111,242,0.06);
}
.cta-banner h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; color: var(--text-dark); margin-bottom: 12px; }
.cta-banner p { font-size: 15px; color: var(--text-body); margin-bottom: 28px; }
.cta-banner .btn { min-width: 180px; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-page); }
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-card);
  border-left: 4px solid var(--primary);
  border-radius: 12px;
  margin-bottom: 14px;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item[open] { background: var(--bg-page); box-shadow: var(--shadow-card); }
.faq-item summary {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "\f107";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--text-light);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
.faq-item summary:hover { color: var(--primary); }
.faq-content { padding: 0 24px 20px 24px; font-size: 14px; color: var(--text-body); line-height: 1.7; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.85); padding-top: 64px; }
.site-footer a { color: rgba(255,255,255,0.7); }
.site-footer a:hover { color: #fff; }
.footer-top { padding-bottom: 48px; }
.footer-brand { padding-right: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: #fff !important; margin-bottom: 10px; }
.footer-logo .logo-icon { width: 36px; height: 36px; border-radius: 8px; background: #fff; color: var(--primary-dark); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 16px; line-height: 1.5; }
.footer-links h4 { font-size: 14px; color: #fff; font-weight: 600; margin-bottom: 16px; }
.footer-links a { display: block; font-size: 13px; padding: 5px 0; color: rgba(255,255,255,0.7); }
.footer-links a:hover { color: #fff; transform: translateX(2px); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 24px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom p { margin-bottom: 4px; }
.footer-bottom p:last-child { margin-bottom: 0; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section { padding: 60px 0; }
  .hero { padding: 56px 0 64px; }
  .hero-float-card { left: 8px; bottom: 8px; }
  .scenario-block { gap: 28px; margin-bottom: 48px; }
  .pricing-card.featured { transform: translateY(0); }
  .pricing-card.featured:hover { transform: translateY(-4px); }
}
@media (max-width: 768px) {
  .section { padding: 40px 0; }
  .section-head { margin-bottom: 36px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border-line);
    box-shadow: var(--shadow-hover);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 999;
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link { display: block; width: 100%; padding: 12px 16px; border-radius: 8px; }
  .status-pill { display: none; }
  .nav-actions { gap: 10px; }
  .hero { padding: 40px 0 48px; }
  .hero-content { padding-right: 0; margin-bottom: 32px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .hero-visual { margin-top: 8px; }
  .hero-float-card { left: 12px; bottom: 12px; padding: 10px 16px; gap: 14px; }
  .feature-card { padding: 22px; }
  .feature-card.wide { padding: 24px; }
  .feature-card.wide .feature-card-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
  .scenario-block { flex-direction: column !important; gap: 24px; margin-bottom: 40px; }
  .scenario-image { flex: none; width: 100%; }
  .scenario-text { width: 100%; }
  .stat-item { padding: 16px 8px; }
  .stat-num { font-size: 26px; }
  .case-cards .cell { margin-bottom: 24px; }
  .pricing-card { padding: 28px 24px; margin-bottom: 28px; }
  .pricing-card.featured { padding-top: 40px; }
  .news-card { padding: 20px; }
  .cta-banner { padding: 40px 0; }
  .faq-item summary { padding: 16px 18px; }
  .faq-content { padding: 0 18px 16px 18px; }
  .footer-top { padding-bottom: 32px; }
}
@media (max-width: 520px) {
  .grid-container { padding-left: 16px; padding-right: 16px; }
  .brand-logo .logo-badge { display: none; }
  .brand-logo .logo-text { font-size: 18px; }
  .hero h1 { font-size: 24px; }
  .hero-actions .btn { width: 100%; }
  .hero-float-card { display: none; }
  .btn-lg { width: 100%; }
  .cta-banner .btn { width: 100%; }
  .footer-bottom { padding: 20px 0; }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root {
  --primary: #2E6FF2;
  --primary-light: #EAF2FF;
  --primary-dark: #244E8C;
  --accent: #F08C00;
  --teal: #17B8A6;
  --title-color: #1F2A44;
  --text-color: #5C6B8A;
  --muted-color: #8A97AD;
  --bg-page: #F7F9FC;
  --bg-card: #FFFFFF;
  --border-color: #E3EAF4;
  --divider: #EDF1F6;
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-badge: 6px;
  --shadow-card: 0 4px 20px rgba(31,42,68,0.06);
  --shadow-hover: 0 12px 32px rgba(31,42,68,0.12);
  --transition: all 0.2s ease;
}

/* ============ Reset / Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-color);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover, a:focus { color: var(--primary-dark); }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
h1, h2, h3, h4, h5, h6 { color: var(--title-color); font-weight: 700; line-height: 1.35; }

/* ============ 容器 ============ */
.grid-container { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}
.btn i { margin-right: 8px; font-size: 14px; }
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; box-shadow: 0 0 0 4px rgba(46,111,242,0.18); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(46,111,242,0.28); }
.btn-primary:active { transform: translateY(0) scale(0.98); box-shadow: 0 2px 8px rgba(46,111,242,0.2); }
.btn-outline { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-1px); }
.btn-outline:active { transform: scale(0.98); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-1px); }
.btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }
.btn-lg { height: 50px; padding: 0 32px; font-size: 16px; }
.btn-outline-light { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.7); }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); color: #fff; transform: translateY(-1px); }
.btn-block { width: 100%; }

/* ============ 徽章 / 标签 ============ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
}
.badge-accent { background: rgba(240,140,0,0.12); color: var(--accent); }
.badge-teal { background: rgba(23,184,166,0.12); color: var(--teal); }
.badge-primary { background: rgba(46,111,242,0.1); color: var(--primary); }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 100px;
  border: 1px solid rgba(46,111,242,0.28);
  background: rgba(46,111,242,0.06);
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  position: relative;
}
.status-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid rgba(23,184,166,0.5);
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.4); opacity: 0; }
}

/* ============ 头部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--divider);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(46,111,242,0.24);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--title-color);
  letter-spacing: 0.5px;
}
.logo-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--title-color);
  border-radius: 6px;
  transition: var(--transition);
  font-weight: 500;
}
.nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--title-color);
  transition: var(--transition);
}
.nav-toggle:hover span { background: var(--primary); }
.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); }

/* ============ 分类页 Hero ============ */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, #EAF2FF 0%, #F7F9FC 60%, #fff 100%);
  padding: 90px 0 88px;
  overflow: hidden;
  border-bottom: 1px solid var(--divider);
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -5%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: rgba(46,111,242,0.06);
  pointer-events: none;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 100px;
  background: rgba(46,111,242,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-eyebrow i { font-size: 12px; }
.page-hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--title-color);
}
.page-hero .hero-sub {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-color);
  max-width: 540px;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-visual {
  position: relative;
}
.hero-visual .main-img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4/3;
  object-fit: cover;
}
.hero-visual .float-card {
  position: absolute;
  bottom: -18px;
  left: 24px;
  background: #fff;
  border-radius: 12px;
  padding: 14px 18px;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 12px;
}
.float-card .fc-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}
.float-card .fc-text strong { display: block; font-size: 14px; color: var(--title-color); line-height: 1.3; }
.float-card .fc-text span { font-size: 12px; color: var(--muted-color); }

/* ============ 内容区块 ============ */
.section-block { padding: 80px 0; }
.section-block.bg-light { background: var(--bg-page); }
.section-block.bg-white { background: #fff; }
.section-head { margin-bottom: 48px; }
.section-head.center { text-align: center; max-width: 640px; margin-left: auto; margin-right: auto; }
.section-head .section-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(46,111,242,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head h2 {
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 14px;
}
.section-head p { font-size: 15px; color: var(--muted-color); line-height: 1.7; }

/* 图文交织 */
.media-block { display: flex; align-items: center; gap: 48px; }
.media-block.reverse { flex-direction: row-reverse; }
.media-block .media-text { flex: 1 1 50%; }
.media-block .media-img { flex: 1 1 50%; }
.media-block .media-img img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: var(--transition);
}
.media-block .media-img img:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.media-block h3 { font-size: clamp(20px, 2vw, 24px); margin-bottom: 16px; }
.media-block p { margin-bottom: 16px; line-height: 1.8; }
.check-list { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--text-color); line-height: 1.6; }
.check-list li i { color: var(--teal); font-size: 14px; margin-top: 4px; flex-shrink: 0; }

/* 提示信息条 */
.notice-bar {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  border-radius: 12px;
  background: rgba(240,140,0,0.08);
  border-left: 4px solid var(--accent);
  margin-top: 24px;
}
.notice-bar i { color: var(--accent); font-size: 16px; margin-top: 3px; }
.notice-bar p { font-size: 14px; line-height: 1.7; color: var(--title-color); }

/* 版本更新列表 */
.update-list { display: flex; flex-direction: column; gap: 20px; max-width: 680px; }
.update-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.update-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.version-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.update-card h3 { font-size: 16px; margin-bottom: 6px; }
.update-card p { font-size: 14px; color: var(--muted-color); line-height: 1.6; }
.update-meta { display: flex; gap: 10px; margin-top: 8px; flex-wrap: wrap; }

/* ============ 步骤流程 ============ */
.steps-grid { display: flex; flex-wrap: wrap; gap: 24px; }
.step-card {
  flex: 1 1 220px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
}
.step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: var(--transition);
}
.step-card:hover .step-num { background: var(--primary); color: #fff; }
.step-card h3 { font-size: 16px; margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--muted-color); line-height: 1.6; }

/* ============ FAQ 手风琴 ============ */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}
.faq-item summary {
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--title-color);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--muted-color);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary { background: var(--primary-light); }
.faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
.faq-item .faq-content { padding: 0 22px 20px; font-size: 14px; line-height: 1.75; color: var(--text-color); }

/* ============ CTA 横幅 ============ */
.cta-banner {
  background: var(--primary-dark);
  padding: 64px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::after {
  content: "";
  position: absolute;
  bottom: -60px;
  right: -40px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}
.cta-banner h2 { color: #fff; font-size: clamp(22px, 3vw, 30px); margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.7); font-size: 15px; margin-bottom: 28px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 2; }

/* ============ 页面底部 ============ */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.75);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-top { padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 300px; margin-bottom: 20px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links h4 { font-size: 15px; color: #fff; margin-bottom: 12px; font-weight: 600; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  padding: 20px 0 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  line-height: 1.6;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #fff; }

/* ============ 响应式 ============ */
@media (min-width: 641px) and (max-width: 1024px) {
  .hero-actions { flex-wrap: wrap; }
  .media-block, .media-block.reverse { gap: 32px; }
  .step-card { flex: 1 1 46%; }
}

@media (max-width: 640px) {
  .section-block { padding: 48px 0; }
  .nav-wrap { height: 64px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--divider);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    box-shadow: 0 16px 32px rgba(31,42,68,0.1);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 12px 14px; font-size: 15px; border-radius: 8px; }
  .nav-toggle { display: flex; }
  .nav-actions .status-pill { display: none; }
  .page-hero { padding: 56px 0 64px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-visual { margin-top: 40px; }
  .float-card { bottom: -14px; left: 16px; }
  .media-block, .media-block.reverse { flex-direction: column; gap: 24px; }
  .media-block .media-text, .media-block .media-img { flex: none; width: 100%; }
  .update-card { flex-direction: column; gap: 12px; }
  .steps-grid { flex-direction: column; }
  .step-card { flex: 1 1 auto; }
  .cta-banner { padding: 48px 0; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .footer-top { gap: 32px; }
  .site-footer { padding-top: 48px; }
}

/* ============ 工具 ============ */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }

/* ============ 动画 ============ */
.fade-up {
  animation: fadeUp 0.7s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* roulang page: article */
:root{
  --primary:#2E6FF2;
  --primary-light:#EAF2FF;
  --primary-dark:#244E8C;
  --accent:#F08C00;
  --teal:#17B8A6;
  --text-heading:#1F2A44;
  --text-body:#5C6B8A;
  --text-muted:#8A97AD;
  --bg-page:#F7F9FC;
  --bg-card:#FFFFFF;
  --border:#E3EAF4;
  --divider:#EDF1F6;
  --radius-lg:16px;
  --radius-md:8px;
  --radius-sm:6px;
  --shadow-card:0 4px 20px rgba(31,42,68,0.06);
  --shadow-hover:0 12px 32px rgba(31,42,68,0.12);
  --font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --header-h:72px;
  --section-gap:clamp(48px,8vw,80px);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  font-size:16px;
  line-height:1.7;
  color:var(--text-body);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  padding-top:var(--header-h);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--primary-light);color:var(--primary-dark)}

.grid-container{
  max-width:1240px;
  width:100%;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media screen and (max-width:640px){
  .grid-container{padding-left:16px;padding-right:16px}
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:42px;
  padding:0 22px;
  border-radius:var(--radius-md);
  font-size:14px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(46,111,242,.2);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0) scale(.98)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.btn-outline:active{transform:translateY(0) scale(.98)}
.btn-sm{height:36px;padding:0 18px;font-size:13px}
.btn-light{background:#fff;color:var(--primary-dark)}
.btn-light:hover{background:var(--primary-light);color:var(--primary);transform:translateY(-2px)}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--divider);
  display:flex;
  align-items:center;
}
.site-header .grid-container{width:100%}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:22px;
  font-weight:700;
  color:var(--text-heading);
  white-space:nowrap;
}
.logo-icon{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  font-weight:800;
}
.logo-text{letter-spacing:.5px}
.logo-badge{
  font-size:11px;
  font-weight:600;
  color:var(--primary);
  background:var(--primary-light);
  border:1px solid rgba(46,111,242,.25);
  border-radius:4px;
  padding:2px 6px;
  letter-spacing:.3px;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:24px;
}
.nav-link{
  display:inline-block;
  padding:8px 16px;
  font-size:14px;
  font-weight:500;
  color:var(--text-body);
  border-radius:var(--radius-md);
  transition:background .2s,color .2s;
}
.nav-link:hover{color:var(--primary);background:var(--primary-light)}
.nav-link.active{color:var(--primary);background:var(--primary-light);font-weight:600}
.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.status-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--primary);
  background:var(--primary-light);
  border:1px solid rgba(46,111,242,.3);
  border-radius:999px;
  padding:4px 12px;
  font-weight:500;
}
.status-dot{
  width:6px;height:6px;border-radius:50%;
  background:#16C46F;
  display:inline-block;
  animation:pulse 1.5s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:42px;height:42px;
  border-radius:8px;
  border:1px solid var(--divider);
  background:#fff;
}
.nav-toggle span{
  width:20px;height:2px;
  background:var(--text-heading);
  border-radius:2px;
  transition:transform .3s;
}

.breadcrumb-bar{
  background:var(--bg-page);
  border-bottom:1px solid var(--divider);
  padding:14px 0;
}
.breadcrumb-nav{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:6px;
  font-size:13px;
  color:var(--text-muted);
}
.breadcrumb-nav a{color:var(--text-muted);transition:color .2s}
.breadcrumb-nav a:hover{color:var(--primary)}
.breadcrumb-sep{color:#c6d0e0}
.breadcrumb-current{
  color:var(--text-body);
  font-weight:500;
  max-width:420px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

.article-section{padding:48px 0 24px}
.article-container{max-width:960px}
.article-card{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  padding:clamp(24px,5vw,48px);
}
.article-header{
  text-align:center;
  margin-bottom:28px;
  padding-bottom:24px;
  border-bottom:1px solid var(--divider);
}
.article-header h1{
  font-size:clamp(28px,4vw,38px);
  font-weight:700;
  line-height:1.3;
  color:var(--text-heading);
  margin-bottom:16px;
  letter-spacing:.5px;
}
.article-meta{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:8px 24px;
  font-size:13px;
  color:var(--text-muted);
}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-item i{color:var(--primary);font-size:14px}

.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:16px;
  line-height:1.9;
  color:var(--text-body);
}
.article-body h2,.article-body h3,.article-body h4{
  color:var(--text-heading);
  margin:28px 0 12px;
  font-weight:700;
  letter-spacing:.3px;
}
.article-body h2{font-size:22px}
.article-body h3{font-size:18px}
.article-body p{margin-bottom:16px}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--primary-dark)}
.article-body ul,.article-body ol{margin:0 0 16px;padding-left:24px}
.article-body li{margin-bottom:8px}
.article-body li::marker{color:var(--primary)}
.article-body blockquote{
  border-left:4px solid var(--primary);
  background:var(--primary-light);
  padding:16px 20px;
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  margin:0 0 16px;
  color:var(--text-body);
  font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:8px;border:1px solid var(--border);margin:16px 0}
.article-body table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  margin:16px 0;
}
.article-body table th,.article-body table td{
  border:1px solid var(--border);
  padding:10px 14px;
  text-align:left;
}
.article-body table th{background:var(--primary-light);color:var(--text-heading);font-weight:600}
.article-body table tr:nth-child(even){background:#FAFBFD}
.article-body pre{
  background:#F1F5F9;
  border-radius:8px;
  padding:16px;
  overflow:auto;
  font-size:14px;
  line-height:1.6;
  margin:16px 0;
  border:1px solid var(--border);
}
.article-body code{
  font-family:"SF Mono",Monaco,Consolas,"Liberation Mono",monospace;
  background:#F1F5F9;
  padding:2px 6px;
  border-radius:4px;
  font-size:13px;
  color:#D63384;
}
.article-body pre code{background:transparent;padding:0;color:var(--text-heading);display:block}
.article-body hr{margin:28px 0;border:0;border-top:1px solid var(--divider)}
.article-body strong{color:var(--text-heading)}

.prev-next-section{padding:28px 0 8px}
.article-prev-next{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.prev-next-btn{
  display:flex;
  flex-direction:column;
  gap:6px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:20px 24px;
  transition:box-shadow .2s,transform .2s,border-color .2s;
}
.prev-next-btn:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
  border-color:rgba(46,111,242,.4);
}
.prev-next-btn.next{text-align:right}
.pn-label{font-size:12px;color:var(--text-muted);font-weight:500}
.pn-title{
  font-size:15px;
  color:var(--text-heading);
  font-weight:600;
  line-height:1.4;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.related-section{padding:56px 0 24px}
.section-head{text-align:center;margin-bottom:36px}
.section-head h2{
  font-size:clamp(22px,3vw,30px);
  color:var(--text-heading);
  font-weight:700;
}
.section-head p{font-size:14px;color:var(--text-muted);margin-top:8px}
.related-card{
  display:flex;
  flex-direction:column;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:box-shadow .2s,transform .2s;
  height:100%;
}
.related-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.related-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--primary-light);
}
.related-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.related-card:hover .related-thumb img{transform:scale(1.05)}
.related-content{
  padding:20px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.related-tag{
  display:inline-block;
  font-size:12px;
  color:var(--primary);
  background:var(--primary-light);
  padding:3px 10px;
  border-radius:999px;
  font-weight:500;
  width:fit-content;
  margin-bottom:10px;
}
.related-content h3{
  font-size:16px;
  color:var(--text-heading);
  font-weight:600;
  line-height:1.45;
  margin-bottom:8px;
}
.related-content p{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.6;
  flex:1;
}
.related-date{font-size:12px;color:var(--text-muted);margin-top:12px}
.related-col{margin-bottom:20px}

.article-return{
  padding:24px 0 64px;
  text-align:center;
}

.empty-state-section{
  padding:120px 0;
  min-height:60vh;
  display:flex;
  align-items:center;
}
.empty-state{
  text-align:center;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:64px 32px;
  box-shadow:var(--shadow-card);
  max-width:520px;
  margin:0 auto;
}
.empty-state i{font-size:48px;color:var(--text-muted);margin-bottom:16px}
.empty-state p{font-size:18px;color:var(--text-heading);margin-bottom:20px}

.site-footer{
  background:var(--primary-dark);
  color:rgba(255,255,255,.85);
  padding:56px 0 0;
}
.footer-top{padding-bottom:32px}
.footer-brand .footer-logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:22px;
  font-weight:700;
  color:#fff;
  margin-bottom:12px;
}
.footer-brand .logo-icon{
  width:34px;height:34px;
  border-radius:9px;
  background:#fff;
  color:var(--primary-dark);
  font-size:16px;
}
.footer-brand p{
  font-size:13px;
  color:rgba(255,255,255,.55);
  max-width:280px;
  margin-bottom:20px;
  line-height:1.6;
}
.footer-links h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
  letter-spacing:.5px;
}
.footer-links a{
  display:block;
  color:rgba(255,255,255,.55);
  font-size:13px;
  padding:4px 0;
  transition:color .2s,padding-left .2s;
}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0;
  text-align:center;
}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,.4);margin:0}

@media screen and (max-width:1024px){
  .main-nav{
    display:none;
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    background:#fff;
    padding:16px;
    flex-direction:column;
    align-items:stretch;
    box-shadow:var(--shadow-hover);
    gap:4px;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 16px}
  .nav-toggle{display:inline-flex}
  .status-pill{display:none}
  .article-prev-next{grid-template-columns:1fr}
}

@media screen and (max-width:640px){
  :root{--header-h:64px}
  body{padding-top:64px}
  .brand-logo{font-size:18px}
  .logo-icon{width:30px;height:30px;font-size:14px}
  .nav-actions .btn-sm{padding:0 12px;height:32px;font-size:12px}
  .article-card{padding:20px;border-radius:12px}
  .article-header h1{font-size:24px}
  .article-meta{gap:6px 16px}
  .article-body{font-size:15px}
  .article-body h2{font-size:19px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .prev-next-btn{padding:16px}
  .related-section{padding-top:40px}
  .related-thumb{aspect-ratio:16/10}
  .site-footer{padding-top:40px}
  .footer-top{padding-bottom:16px}
  .footer-links{margin-bottom:20px}
  .empty-state-section{padding:80px 0}
  .empty-state{padding:48px 24px}
}

/* roulang page: category3 */
:root {
  --primary: #2E6FF2;
  --primary-light: #EAF2FF;
  --primary-dark: #244E8C;
  --accent: #F08C00;
  --teal: #17B8A6;
  --text-main: #1F2A44;
  --text-body: #5C6B8A;
  --text-muted: #8A97AD;
  --bg-page: #F7F9FC;
  --bg-card: #FFFFFF;
  --border: #E3EAF4;
  --border-light: #EDF1F6;
  --radius-card: 16px;
  --radius-btn: 8px;
  --radius-tag: 6px;
  --shadow-card: 0 4px 20px rgba(31,42,68,0.06);
  --shadow-hover: 0 12px 32px rgba(31,42,68,0.12);
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-page);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; }
.grid-container { max-width: 1280px; padding-left: 20px; padding-right: 20px; }
::selection { background: var(--primary-light); color: var(--primary-dark); }
.section-block { padding: 80px 0; }
.section-header {
  max-width: 640px;
  margin-bottom: 48px;
}
.section-header .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 12px;
}
.section-header p { color: var(--text-body); font-size: 15px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 10px 22px;
  min-height: 40px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  line-height: 1.4;
  text-decoration: none;
}
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(46,111,242,.35); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(46,111,242,.3); }
.btn-primary:active { background: #1a3d6e; transform: translateY(0) scale(.98); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(46,111,242,.15); }
.btn-outline:active { transform: translateY(0) scale(.98); }
.btn-light { background: #fff; color: var(--primary-dark); border-color: #fff; }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.15); }
.btn-sm { padding: 8px 16px; font-size: 14px; min-height: 36px; }

/* ===== 导航 ===== */
.site-header {
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 10px rgba(31,42,68,.03);
}
.site-header .nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 19px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(46,111,242,.25);
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--text-main); letter-spacing: .5px; }
.logo-badge {
  background: linear-gradient(135deg, var(--accent), #ff9a2e);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: .5px;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav .nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
  white-space: nowrap;
}
.main-nav .nav-link:hover { background: var(--primary-light); color: var(--primary); }
.main-nav .nav-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: .3px;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(23,184,166,.4); }
  50% { box-shadow: 0 0 0 4px rgba(23,184,166,.1); }
}
.nav-toggle {
  display: none;
  border: none;
  background: var(--primary-light);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; transition: all .3s ease; }
.nav-toggle:hover { background: #dbe9ff; }

/* ===== 分类页 Hero ===== */
.page-hero {
  background: linear-gradient(180deg, var(--primary-light) 0%, #f2f7ff 100%);
  padding: 60px 0 64px;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}
.page-hero .hero-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.page-hero .hero-title .highlight { color: var(--primary); }
.page-hero .hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-body);
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(31,42,68,.04);
}
.hero-badge i { color: var(--primary); }
.hero-visual { position: relative; }
.hero-visual .main-img {
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.hero-float-card {
  position: absolute;
  bottom: -18px;
  left: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-hover);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-light);
}
.hero-float-card .float-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}
.hero-float-card .float-text { font-size: 13px; color: var(--text-body); line-height: 1.4; }
.hero-float-card .float-text strong { color: var(--text-main); font-size: 13px; }

/* ===== 服务范围 ===== */
.service-zone { background: #fff; }
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 28px;
  box-shadow: var(--shadow-card);
  transition: transform .2s ease, box-shadow .2s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--teal));
  opacity: 0;
  transition: opacity .2s ease;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.service-card:hover::before { opacity: 1; }
.service-card .card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  margin-bottom: 18px;
  transition: background .2s ease, color .2s ease;
}
.service-card:hover .card-icon { background: var(--primary); color: #fff; }
.service-card h3 { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 10px; line-height: 1.4; }
.service-card p { font-size: 14px; color: var(--text-body); line-height: 1.7; margin-bottom: 14px; }
.service-card .card-link { font-size: 14px; font-weight: 600; color: var(--primary); margin-top: auto; display: inline-flex; align-items: center; gap: 4px; }
.service-card .card-link:hover { text-decoration: underline; }
.service-card-full {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 34px;
  background: linear-gradient(135deg, var(--primary-light), #f6f9ff);
  display: flex;
  align-items: center;
  gap: 24px;
  box-shadow: var(--shadow-card);
  margin-top: 24px;
  position: relative;
  overflow: hidden;
}
.service-card-full .card-icon { flex-shrink: 0; width: 52px; height: 52px; border-radius: 12px; background: var(--accent); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 22px; }
.service-card-full h3 { font-size: 18px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; }
.service-card-full p { font-size: 14px; color: var(--text-body); line-height: 1.6; max-width: 760px; }

/* ===== 统计条 ===== */
.stats-section {
  background: var(--primary-dark);
  background-image: linear-gradient(135deg, rgba(255,255,255,.04) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.04) 50%, rgba(255,255,255,.04) 75%, transparent 75%, transparent);
  background-size: 24px 24px;
  padding: 50px 0;
}
.stats-section .stat-item { text-align: center; padding: 16px 8px; }
.stats-section .stat-num {
  font-size: 34px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: .5px;
}
.stats-section .stat-label {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  display: block;
  margin-top: 6px;
  letter-spacing: .5px;
}
.stats-section .stat-num.teal { color: var(--teal); }
.stats-section .stat-num.orange { color: #ffb25e; }

/* ===== 处理流程 ===== */
.process-section { background: var(--bg-page); }
.process-steps { position: relative; padding-left: 0; }
.process-steps::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 28px;
  width: 3px;
  background: linear-gradient(180deg, var(--primary) 20%, rgba(46,111,242,.15) 100%);
  border-radius: 3px;
}
.process-step {
  position: relative;
  padding: 0 0 36px 76px;
  min-height: 70px;
}
.process-step:last-child { padding-bottom: 0; }
.process-step .step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: #fff;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(46,111,242,.15);
  z-index: 1;
}
.process-step .step-body { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card); padding: 22px 26px; box-shadow: var(--shadow-card); transition: transform .2s ease, box-shadow .2s ease; }
.process-step .step-body:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.process-step .step-body h3 { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.process-step .step-body h3 i { color: var(--primary); font-size: 14px; }
.process-step .step-body p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-section { background: #fff; }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 12px;
  margin-bottom: 16px;
  background: #fff;
  overflow: hidden;
  transition: background .2s ease, box-shadow .2s ease;
}
.faq-item:hover { box-shadow: var(--shadow-card); }
.faq-item summary {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background .2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
  color: var(--primary);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary { background: var(--primary-light); }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .faq-body { padding: 0 24px 20px; font-size: 14px; color: var(--text-body); line-height: 1.7; }
.faq-item .faq-body a { font-weight: 600; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-light), #e8f1ff);
  padding: 64px 0;
  text-align: center;
}
.cta-section .cta-inner { max-width: 720px; margin: 0 auto; }
.cta-section h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.cta-section p { font-size: 15px; color: var(--text-body); margin-bottom: 26px; }
.cta-buttons { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  background-image: linear-gradient(135deg, rgba(255,255,255,.03) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.03) 50%, rgba(255,255,255,.03) 75%, transparent 75%, transparent);
  background-size: 32px 32px;
  color: rgba(255,255,255,.8);
  padding: 60px 0 0;
}
.footer-top { padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  margin-bottom: 14px;
}
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.7); margin-bottom: 20px; max-width: 320px; }
.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: .5px;
}
.footer-links a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  margin-bottom: 10px;
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,.5); margin: 0; }

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
  .main-nav { gap: 4px; }
  .main-nav .nav-link { padding: 7px 10px; font-size: 14px; }
  .section-block { padding: 64px 0; }
}
@media screen and (max-width: 768px) {
  .site-header .nav-wrap { height: auto; min-height: 64px; flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0 16px;
    border-top: 1px solid var(--border-light);
  }
  .main-nav.open { display: flex; }
  .main-nav .nav-link { width: 100%; padding: 10px 12px; }
  .nav-actions .status-pill { display: none; }
  .section-block { padding: 48px 0; }
  .process-steps::before { left: 22px; }
  .process-step { padding-left: 62px; }
  .process-step .step-num { width: 44px; height: 44px; border-radius: 12px; font-size: 15px; }
  .service-card-full { flex-direction: column; text-align: center; padding: 24px 20px; gap: 14px; }
  .page-hero { padding: 44px 0 56px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media screen and (max-width: 520px) {
  .grid-container { padding-left: 16px; padding-right: 16px; }
  .brand-logo .logo-badge { display: none; }
  .nav-actions .btn-sm { padding: 7px 12px; font-size: 13px; }
  .hero-float-card { bottom: -14px; left: 12px; padding: 10px 14px; }
  .stats-section .stat-num { font-size: 26px; }
  .faq-item summary { padding: 14px 16px; font-size: 14px; }
  .faq-item .faq-body { padding: 0 16px 16px; }
  .cta-buttons .btn { width: 100%; }
}

/* roulang page: category2 */
:root{
  --primary:#2E6FF2;
  --primary-light:#EAF2FF;
  --primary-dark:#244E8C;
  --accent:#F08C00;
  --teal:#17B8A6;
  --text-main:#1F2A44;
  --text-body:#5C6B8A;
  --text-weak:#8A97AD;
  --text-white:#FFFFFF;
  --bg-page:#F7F9FC;
  --bg-card:#FFFFFF;
  --border-card:#E3EAF4;
  --border-divider:#EDF1F6;
  --radius-card:16px;
  --radius-btn:8px;
  --radius-tag:6px;
  --shadow-card:0 4px 20px rgba(31,42,68,0.06);
  --shadow-card-hover:0 12px 32px rgba(31,42,68,0.12);
  --font-stack:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --transition:all .2s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-stack);
  background:var(--bg-page);
  color:var(--text-body);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
a:focus-visible,.btn:focus-visible,.nav-link:focus-visible,.feature-link:focus-visible,.faq-item summary:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}
.grid-container{max-width:1200px}
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border-divider);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:20px;
}
.brand-logo{
  display:flex;align-items:center;gap:8px;
  text-decoration:none;color:var(--text-main);
  font-weight:700;font-size:20px;white-space:nowrap;
}
.logo-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;background:var(--primary);
  color:#fff;border-radius:10px;font-weight:800;font-size:18px;
}
.logo-badge{
  font-size:11px;font-weight:500;color:var(--primary);
  background:var(--primary-light);padding:3px 10px;border-radius:100px;
}
.main-nav{display:flex;gap:4px}
.nav-link{
  display:block;padding:8px 16px;border-radius:var(--radius-tag);
  font-size:15px;color:var(--text-body);text-decoration:none;transition:var(--transition);
}
.nav-link:hover{background:var(--primary-light);color:var(--primary)}
.nav-link.active{background:var(--primary-light);color:var(--primary);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px}
.status-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--primary);
  border:1px solid rgba(46,111,242,.3);
  padding:4px 12px;border-radius:100px;background:rgba(255,255,255,.7);white-space:nowrap;
}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--teal);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.78)}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:42px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;text-decoration:none;
  transition:var(--transition);cursor:pointer;border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 8px 20px rgba(36,78,140,.25)}
.btn-primary:active{transform:translateY(0) scale(.98)}
.btn-secondary{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-secondary:hover{background:var(--primary-light);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(0) scale(.98)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-light{background:#fff;color:var(--primary-dark);height:38px;padding:0 20px}
.btn-light:hover{background:var(--primary-light)}
.nav-toggle{
  display:none;flex-direction:column;gap:4px;
  background:none;border:none;padding:6px;cursor:pointer;
}
.nav-toggle span{width:22px;height:2px;background:var(--text-main);border-radius:2px;transition:var(--transition)}

.page-hero{
  background:var(--primary-light);
  padding:70px 0 80px;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;top:-80px;right:-40px;
  width:380px;height:380px;border-radius:50%;
  background:rgba(46,111,242,.08);
}
.page-hero::after{
  content:"";position:absolute;bottom:-60px;left:10%;
  width:220px;height:220px;border-radius:50%;
  background:rgba(240,140,0,.06);
}
.page-hero-wrap{position:relative;z-index:1}
.page-hero-content{position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(46,111,242,.1);color:var(--primary);
  font-size:13px;padding:5px 14px;border-radius:100px;margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(28px,4vw,40px);font-weight:700;line-height:1.25;
  color:var(--text-main);margin-bottom:18px;
}
.page-hero .lead{
  color:var(--text-body);font-size:16px;line-height:1.75;
  max-width:560px;margin-bottom:28px;
}
.hero-cta-group{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.hero-meta{display:flex;gap:20px;flex-wrap:wrap}
.hero-meta-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-weak)}
.hero-meta-item i{color:var(--primary)}
.page-hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius-card);box-shadow:var(--shadow-card-hover);
}

.section-block{padding:80px 0}
.section-block.alt{background:var(--bg-page)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.section-head h2{font-size:clamp(22px,3vw,30px);color:var(--text-main);margin-bottom:12px}
.section-head p{color:var(--text-body);font-size:15px;line-height:1.7}

.feature-row{margin-bottom:64px}
.feature-row:last-child{margin-bottom:0}
.feature-text{padding:20px}
.feature-media{padding:20px}
.feature-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
}
.feature-tag{
  display:inline-block;font-size:12px;color:var(--primary);
  background:var(--primary-light);padding:4px 12px;border-radius:100px;
  margin-bottom:12px;font-weight:500;
}
.feature-text h3{
  font-size:clamp(18px,2vw,22px);color:var(--text-main);
  margin-bottom:12px;line-height:1.4;
}
.feature-text p{color:var(--text-body);font-size:15px;line-height:1.75}
.feature-link{
  display:inline-flex;align-items:center;gap:4px;
  color:var(--primary);font-size:14px;text-decoration:none;margin-top:12px;
  transition:var(--transition);
}
.feature-link:hover{text-decoration:underline;gap:8px}

.process-step{
  background:var(--bg-card);border:1px solid var(--border-card);
  border-radius:var(--radius-card);padding:32px 24px;height:100%;
  box-shadow:var(--shadow-card);transition:var(--transition);
}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.process-step + .process-step{margin-top:24px}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;background:var(--primary);color:#fff;
  font-size:18px;font-weight:700;border-radius:12px;margin-bottom:16px;
}
.step-title{font-size:16px;font-weight:600;color:var(--text-main);margin-bottom:8px}
.step-desc{font-size:14px;color:var(--text-body);line-height:1.6}

.timeline-wrap{
  max-width:780px;margin:0 auto;position:relative;padding-left:30px;
}
.timeline-wrap::before{
  content:"";position:absolute;left:9px;top:10px;bottom:10px;
  width:2px;background:var(--border-divider);
}
.timeline-item{
  position:relative;display:flex;gap:24px;padding:16px 0;
}
.timeline-item::before{
  content:"";position:absolute;left:-26px;top:26px;
  width:12px;height:12px;border-radius:50%;
  background:var(--primary);border:3px solid #fff;
  box-shadow:0 0 0 2px rgba(46,111,242,.25);
}
.timeline-date{
  flex:0 0 170px;font-size:15px;font-weight:600;color:var(--primary);padding-top:4px;
}
.timeline-content{
  flex:1;background:var(--bg-card);border:1px solid var(--border-card);
  border-radius:var(--radius-card);padding:20px 24px;box-shadow:var(--shadow-card);
}
.timeline-content h4{font-size:16px;color:var(--text-main);margin-bottom:6px}
.timeline-content p{font-size:14px;color:var(--text-body);line-height:1.6;margin:0}

.faq-wrap{max-width:720px;margin:0 auto}
.faq-item{
  border-left:4px solid var(--primary);
  border-radius:0 12px 12px 0;
  margin-bottom:16px;overflow:hidden;list-style:none;
  background:var(--bg-card);box-shadow:var(--shadow-card);
}
.faq-item summary{
  padding:18px 24px;font-size:15px;font-weight:600;color:var(--text-main);
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  list-style:none;transition:background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;line-height:1;color:var(--primary);
  transition:transform .2s ease;font-weight:400;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item[open] summary{background:var(--bg-page)}
.faq-answer{padding:0 24px 20px;font-size:14px;color:var(--text-body);line-height:1.7}

.cta-banner{background:var(--primary-light);padding:64px 0;text-align:center}
.cta-banner h2{font-size:clamp(22px,3vw,28px);color:var(--text-main);margin-bottom:10px}
.cta-banner p{color:var(--text-body);font-size:15px;margin-bottom:26px}
.cta-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.85);padding:60px 0 0}
.footer-top{padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-logo{
  display:flex;align-items:center;gap:8px;color:#fff;
  font-size:20px;font-weight:700;text-decoration:none;margin-bottom:12px;
}
.footer-brand p{
  font-size:13px;color:rgba(255,255,255,.6);
  margin:12px 0 18px;line-height:1.7;padding-right:10px;
}
.footer-links h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:600}
.footer-links a{
  display:block;color:rgba(255,255,255,.65);font-size:13px;
  text-decoration:none;padding:4px 0;transition:var(--transition);
}
.footer-links a:hover{color:#fff;padding-left:2px}
.footer-bottom{padding:20px 0;text-align:center;color:rgba(255,255,255,.45);font-size:13px}

@media screen and (max-width:1024px){
  .status-pill{display:none}
  .page-hero{padding:56px 0 64px}
  .section-block{padding:64px 0}
  .feature-row{margin-bottom:40px}
}
@media screen and (max-width:768px){
  .nav-wrap{height:64px}
  .main-nav{
    position:absolute;top:64px;left:0;right:0;background:#fff;
    flex-direction:column;padding:16px 20px;display:none;
    box-shadow:0 12px 32px rgba(0,0,0,.1);
    border-bottom:1px solid var(--border-divider);
  }
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .nav-actions .btn-sm{padding:0 12px;font-size:13px}
  .page-hero-wrap{flex-direction:column}
  .page-hero-media{margin-top:8px}
  .feature-text,.feature-media{padding:12px}
  .section-block{padding:48px 0}
  .process-step + .process-step{margin-top:16px}
  .timeline-wrap{padding-left:20px}
  .timeline-date{flex:0 0 100px;font-size:14px}
  .cta-banner{padding:48px 0}
}
@media screen and (max-width:520px){
  .logo-badge{display:none}
  .brand-logo{font-size:18px}
  .logo-icon{width:32px;height:32px;font-size:16px}
  .hero-cta-group{flex-direction:column}
  .hero-cta-group .btn{width:100%}
  .hero-meta{flex-direction:column;gap:10px}
  .timeline-item{flex-direction:column;gap:10px}
  .timeline-date{flex:none}
  .feature-link{font-size:13px}
  .footer-links{margin-bottom:24px}
}