/* roulang page: index */
:root {
  --primary: #1871A8;
  --primary-dark: #11557F;
  --primary-light: #E6F2F8;
  --accent: #F08C3E;
  --accent-hover: #D9792F;
  --bg: #F6FAFC;
  --surface: #FFFFFF;
  --text-primary: #17324D;
  --text-secondary: #5B7186;
  --border: #D7E3EC;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --shadow-sm: 0 2px 8px rgba(23, 50, 77, 0.04);
  --shadow-md: 0 8px 24px rgba(23, 50, 77, 0.08);
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: inline-block;
  vertical-align: middle;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

p {
  margin: 0 0 16px;
}
p:last-child {
  margin-bottom: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 12px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 {
  font-size: 44px;
  line-height: 1.2;
}
h2 {
  font-size: 32px;
}
h3 {
  font-size: 20px;
}

.grid-container {
  max-width: 1200px;
}

.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  margin-bottom: 12px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn:active {
  transform: translateY(1px) scale(0.98);
  opacity: 0.92;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(240, 140, 62, 0.25);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.8);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  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);
}

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 15px;
}

.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}

/* ============ 导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 2px 12px rgba(23, 50, 77, 0.06);
  border-color: var(--border);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity var(--transition);
}
.site-logo:hover {
  opacity: 0.85;
}
.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.logo-icon::before {
  content: '';
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--accent);
  position: absolute;
  top: 4px;
  right: 4px;
  opacity: 0.9;
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav ul li a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.main-nav ul li a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.main-nav ul li a.active {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-cta {
  margin-left: 8px;
}
.nav-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
.nav-cta a:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: border-color var(--transition), background var(--transition);
}
.menu-toggle:hover {
  border-color: var(--primary);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 96px 0;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(23, 77, 105, 0.55);
}
.hero .grid-container {
  position: relative;
  z-index: 2;
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}
.hero-text {
  flex: 0 0 58%;
  max-width: 58%;
}
.hero-visual {
  flex: 0 0 42%;
  max-width: 42%;
}
.hero h1 {
  color: #fff;
  font-size: 44px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.hero-sub {
  color: rgba(255, 255, 255, 0.88);
  font-size: 18px;
  margin-bottom: 32px;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-screen {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}
.hero-screen img {
  border-radius: var(--radius-md);
  width: 100%;
  display: block;
}

/* ============ 信任徽章 ============ */
.trust-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.trust-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}
.trust-items span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.trust-items span i {
  color: var(--primary);
}

/* ============ 卖点三连 ============ */
.features {
  background: var(--bg);
}
.features-grid {
  display: flex;
  align-items: stretch;
  gap: 24px;
}
.feature-card {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 20px;
}
.feature-card h3 {
  margin-bottom: 10px;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}
.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-card.featured {
  margin-top: -16px;
  transform: translateY(-16px);
  border-top: 4px solid var(--primary);
  box-shadow: var(--shadow-md);
}
.feature-card.featured:hover {
  transform: translateY(-20px);
  box-shadow: var(--shadow-md);
}

/* ============ 场景演示 ============ */
.demo {
  background: var(--surface);
}
.demo-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}
.demo-browser {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.browser-top {
  height: 40px;
  background: #F0F3F5;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
}
.browser-top .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #E56E6E; }
.dot-yellow { background: #EDB458; }
.dot-green { background: #79B794; }
.browser-top .address {
  flex: 1;
  max-width: 300px;
  margin-left: 12px;
  height: 24px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  padding: 0 12px;
}
.browser-body img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  border-radius: 0;
}
.demo-steps {
  flex: 1;
}
.demo-steps h2 {
  margin-bottom: 12px;
}
.demo-steps > p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.demo-steps ol {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.demo-steps ol li {
  position: relative;
  padding-left: 48px;
  counter-increment: step;
}
.demo-steps ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.demo-steps ol li h3 {
  font-size: 17px;
  margin-bottom: 4px;
}
.demo-steps ol li p {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
}
.demo-more {
  margin-top: 28px;
  font-size: 14px;
}
.demo-more a {
  color: var(--primary);
  font-weight: 500;
}
.demo-more a:hover {
  color: var(--primary-dark);
}

/* ============ 最新信息 ============ */
.news {
  background: var(--bg);
}
.news-grid {
  row-gap: 24px;
}
.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  height: 100%;
  min-height: 150px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.news-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.news-date {
  flex: 0 0 80px;
  width: 80px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  padding: 10px 8px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-day {
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
}
.news-month {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.news-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-title {
  font-size: 17px;
  margin-bottom: 8px;
}
.news-title a {
  color: var(--text-primary);
  text-decoration: none;
}
.news-title a:hover {
  color: var(--primary);
}
.news-excerpt {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
  flex: 1;
}
.news-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.news-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
}
.news-link:hover {
  color: var(--primary-dark);
}
.news-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 48px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  font-size: 15px;
}

/* ============ 社会认同 ============ */
.social-proof {
  background: var(--surface);
}
.stats-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 56px;
  padding: 40px 32px;
  background: var(--primary-light);
  border-radius: var(--radius-lg);
}
.stat-item {
  text-align: center;
  flex: 1;
}
.stat-number {
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}
.testimonials-row {
  display: flex;
  gap: 24px;
}
.testimonial-card {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.testimonial-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.testimonial-quote {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 20px;
}
.testimonial-quote i {
  color: var(--primary);
  font-size: 22px;
  margin-right: 4px;
  opacity: 0.6;
}
.testimonial-author {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* ============ FAQ ============ */
.faq {
  background: var(--bg);
}
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  background: var(--surface);
  border: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-question:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}
.faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition) ease, padding var(--transition) ease;
}
.faq-item.active .faq-answer {
  max-height: 400px;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-top: 16px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}
.faq-answer-inner p:last-child {
  margin-bottom: 0;
}

/* ============ 最终CTA ============ */
.final-cta {
  background: var(--surface);
}
.cta-card {
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  border: 1px solid var(--border);
}
.cta-card h2 {
  margin-bottom: 12px;
}
.cta-card p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 460px;
  margin: 0 auto 32px;
}

/* ============ 页脚 ============ */
.site-footer {
  background: #12283A;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-text {
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--transition);
}
.footer-col ul li a:hover {
  color: #fff;
}
.footer-contact {
  font-size: 14px;
  line-height: 1.8;
}
.footer-contact p {
  margin-bottom: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

/* ============ 固定转化条 ============ */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  display: flex;
  justify-content: center;
  padding: 12px 16px;
  pointer-events: none;
}
.sticky-cta-inner {
  max-width: 680px;
  width: 100%;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 10px 14px 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  pointer-events: auto;
}
.sticky-cta-text {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-cta .btn {
  flex-shrink: 0;
}

body {
  padding-bottom: 96px;
}
.site-footer {
  margin-bottom: 0;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .section {
    padding: 72px 0;
  }
  .hero-inner {
    gap: 40px;
  }
  .hero-text {
    flex-basis: 55%;
    max-width: 55%;
  }
  .hero-visual {
    flex-basis: 45%;
    max-width: 45%;
  }
  .features-grid {
    gap: 16px;
  }
  .feature-card {
    padding: 24px;
  }
  .demo-inner {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 48px 0;
  }
  .section-header {
    margin-bottom: 36px;
  }
  .section-header h2 {
    font-size: 28px;
  }
  h1 {
    font-size: 34px;
  }
  body {
    padding-bottom: 80px;
  }

  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }
  .main-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 4px;
    width: 100%;
  }
  .main-nav ul li {
    width: 100%;
  }
  .main-nav ul li a {
    display: block;
    width: 100%;
    padding: 12px 16px;
  }
  .nav-cta {
    margin: 4px 0 0;
    width: 100%;
  }
  .nav-cta a {
    width: 100%;
  }

  .hero {
    min-height: auto;
    padding: 64px 0;
  }
  .hero-inner {
    flex-direction: column;
    gap: 32px;
  }
  .hero-text {
    flex-basis: 100%;
    max-width: 100%;
  }
  .hero-visual {
    flex-basis: 100%;
    max-width: 100%;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 16px;
  }

  .trust-items {
    gap: 12px;
  }
  .trust-items span {
    font-size: 13px;
  }

  .features-grid {
    flex-direction: column;
    gap: 16px;
  }
  .feature-card.featured {
    margin-top: 0;
    transform: none;
    border-top: 4px solid var(--primary);
  }
  .feature-card.featured:hover {
    transform: translateY(-4px);
  }

  .demo-inner {
    flex-direction: column;
    gap: 32px;
  }

  .stats-row {
    flex-wrap: wrap;
    gap: 20px;
    padding: 32px 20px;
  }
  .stat-item {
    flex: 0 0 45%;
  }

  .testimonials-row {
    flex-direction: column;
    gap: 16px;
  }

  .cta-card {
    padding: 48px 24px;
  }
  .cta-card h2 {
    font-size: 26px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .sticky-cta-inner {
    padding: 8px 8px 8px 16px;
  }
  .sticky-cta-text {
    font-size: 14px;
  }
}

@media (max-width: 520px) {
  .sticky-cta-inner {
    padding: 8px;
  }
  .sticky-cta-text {
    display: none;
  }
  .sticky-cta .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .stats-row {
    flex-direction: column;
  }
  .stat-item {
    flex: 0 0 100%;
  }
  .news-card {
    flex-direction: column;
    gap: 12px;
  }
  .news-date {
    flex: 0 0 auto;
    width: 100%;
    flex-direction: row;
    justify-content: center;
    gap: 6px;
    padding: 8px;
  }
  .news-day {
    font-size: 24px;
  }
  .News month {
    display: none;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #1871A8;
  --primary-dark: #11557F;
  --primary-light: #E6F2F8;
  --accent: #F08C3E;
  --accent-hover: #D9792F;
  --bg: #F6FAFC;
  --surface: #FFFFFF;
  --text-primary: #17324D;
  --text-secondary: #5B7186;
  --border: #D7E3EC;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --shadow-sm: 0 2px 8px rgba(23, 50, 77, 0.04);
  --shadow-lg: 0 8px 24px rgba(23, 50, 77, 0.08);
  --transition: 180ms 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", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: var(--primary); transition: color var(--transition); }
a:hover, a:focus { color: var(--primary-dark); outline: none; }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.grid-container { max-width: 1200px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  border-color: var(--border);
  box-shadow: 0 2px 16px rgba(23, 50, 77, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--primary-light);
  position: relative;
  display: inline-block;
  transition: background var(--transition);
}
.logo-icon::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 4px;
  opacity: 0.85;
}
.logo-icon::after {
  content: "";
  position: absolute;
  bottom: 7px;
  right: 7px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}
.logo:hover .logo-icon { background: var(--primary-dark); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav ul {
  display: flex;
  gap: 6px;
  align-items: center;
}
.main-nav ul li a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 32px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.main-nav ul li a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.main-nav ul li a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.main-nav ul li a:active {
  transform: scale(0.97);
}
.nav-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(240, 140, 62, 0.25);
  transition: all var(--transition);
}
.nav-cta a:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(240, 140, 62, 0.3);
}
.nav-cta a:active {
  transform: translateY(0) scale(0.98);
}

/* 汉堡菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 12px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Page Hero ===== */
.page-hero {
  background-color: var(--bg);
  background-image: linear-gradient(135deg, rgba(23, 113, 168, 0.06) 0%, rgba(246, 250, 252, 0.4) 60%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.88);
  pointer-events: none;
}
.page-hero .grid-container { position: relative; z-index: 1; }
.page-hero-inner {
  display: flex;
  align-items: center;
  gap: 56px;
}
.page-hero-text { flex: 0 0 56%; }
.page-hero-image { flex: 0 0 44%; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 32px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge i { font-size: 14px; }
.page-hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.page-hero h1 span {
  color: var(--primary);
}
.page-hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 560px;
  padding-left: 18px;
  border-left: 3px solid var(--primary);
}
.hero-meta {
  display: flex;
  gap: 20px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--surface);
  padding: 8px 16px;
  border-radius: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.hero-meta-item i {
  color: var(--primary);
  font-size: 15px;
}
.page-hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 4px solid #fff;
  width: 100%;
  object-fit: cover;
}

/* ===== Guide Section ===== */
.guide-section {
  padding: 96px 0;
}
.section-title-wrap {
  text-align: center;
  margin-bottom: 56px;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}
.guide-row {
  display: flex;
  align-items: center;
  gap: 64px;
  padding: 48px 0;
}
.guide-row + .guide-row {
  border-top: 1px solid var(--border);
}
.guide-row.reverse {
  flex-direction: row-reverse;
}
.guide-image {
  flex: 0 0 46%;
}
.guide-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  object-fit: cover;
  border: 3px solid var(--surface);
}
.guide-content {
  flex: 0 0 46%;
}
.guide-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all var(--transition);
}
.guide-icon i {
  font-size: 24px;
  color: var(--primary);
}
.guide-content:hover .guide-icon {
  background: var(--primary);
}
.guide-content:hover .guide-icon i {
  color: #fff;
}
.guide-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.4;
}
.guide-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}
.guide-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.guide-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  border-radius: 32px;
  font-weight: 500;
  transition: all var(--transition);
}
.guide-tag i { font-size: 13px; }
.guide-tag:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== Entry CTA ===== */
.entry-section {
  padding: 48px 0 96px;
}
.entry-card {
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(24, 113, 168, 0.12);
}
.entry-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
}
.entry-card::after {
  content: "";
  position: absolute;
  bottom: -30px;
  left: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(24, 113, 168, 0.06);
}
.entry-card h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.entry-card p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 32px;
  line-height: 1.8;
  position: relative;
  z-index: 1;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(240, 140, 62, 0.3);
  transition: all var(--transition);
  position: relative;
  z-index: 1;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(240, 140, 62, 0.35);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
}
.btn-primary i {
  font-size: 16px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 0 0 96px;
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--surface);
  text-align: left;
  transition: all var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-question i {
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  background: #F8FBFD;
  display: none;
}
.faq-item.active .faq-answer {
  display: block;
  padding-top: 4px;
}
.faq-answer p {
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

/* ===== Footer ===== */
.site-footer {
  background: #12283A;
  color: #A8B8C7;
  padding: 64px 0 0;
  font-size: 14px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.15);
}
.footer-logo .logo-icon::before {
  top: 7px; left: 7px;
  width: 11px; height: 11px;
  background: #74C0E8;
}
.footer-logo .logo-icon::after {
  bottom: 6px; right: 6px;
  width: 7px; height: 7px;
  background: var(--accent);
}
.footer-logo .logo-text {
  color: #fff;
  font-size: 19px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #A8B8C7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul a {
  color: #A8B8C7;
  font-size: 14px;
  transition: all var(--transition);
  display: inline-block;
}
.footer-col ul a:hover {
  color: #fff;
  transform: translateX(3px);
}
.footer-contact p {
  margin-bottom: 10px;
  line-height: 1.7;
  font-size: 14px;
  color: #9AAAB8;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #7A8C9C;
}
.footer-bottom a {
  color: #A8B8C7;
}
.footer-bottom a:hover {
  color: #fff;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .page-hero-inner {
    flex-direction: column;
    gap: 32px;
  }
  .page-hero-text, .page-hero-image { flex: 0 0 100%; }
  .page-hero h1 { font-size: 36px; }
  .guide-row {
    gap: 32px;
  }
  .guide-image, .guide-content { flex: 0 0 48%; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    border-bottom: 1px solid var(--border);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateY(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }
  .main-nav ul li {
    width: 100%;
  }
  .main-nav ul li a {
    display: block;
    padding: 12px 16px;
    width: 100%;
    font-size: 16px;
  }
  .nav-cta {
    width: 100%;
  }
  .nav-cta a {
    width: 100%;
    justify-content: center;
  }
  .page-hero {
    padding: 64px 0 56px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .page-hero-desc {
    font-size: 15px;
    padding-left: 14px;
  }
  .section-title {
    font-size: 28px;
  }
  .guide-section {
    padding: 64px 0;
  }
  .guide-row, .guide-row.reverse {
    flex-direction: column;
    gap: 24px;
  }
  .guide-image, .guide-content {
    flex: 0 0 100%;
  }
  .entry-section {
    padding: 24px 0 64px;
  }
  .entry-card {
    padding: 48px 24px;
  }
  .entry-card h2 {
    font-size: 24px;
  }
  .faq-section {
    padding-bottom: 64px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .page-hero h1 {
    font-size: 26px;
  }
  .hero-meta {
    gap: 8px;
  }
  .hero-meta-item {
    padding: 6px 12px;
    font-size: 13px;
  }
  .section-title {
    font-size: 24px;
  }
  .guide-content h2 {
    font-size: 20px;
  }
  .entry-card p {
    font-size: 14px;
  }
  .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 14px;
  }
  .faq-answer {
    padding: 0 18px 16px;
    font-size: 14px;
  }
  .footer-bottom {
    font-size: 12px;
    padding: 16px 8px;
  }
}

@media (max-width: 320px) {
  .container { padding: 0 12px; }
  .page-hero h1 {
    font-size: 24px;
    line-height: 1.35;
  }
  .header-inner {
    height: 64px;
  }
  .logo-text {
    font-size: 18px;
  }
  .faq-question {
    flex-wrap: wrap;
  }
}

/* roulang page: article */
:root {
  --primary: #1871A8;
  --primary-dark: #11557F;
  --primary-light: #E6F2F8;
  --accent: #F08C3E;
  --accent-hover: #D9792F;
  --bg: #F6FAFC;
  --surface: #FFFFFF;
  --text-primary: #17324D;
  --text-secondary: #5B7186;
  --border: #D7E3EC;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --shadow-sm: 0 2px 8px rgba(23, 50, 77, 0.04);
  --shadow-hover: 0 8px 24px rgba(23, 50, 77, 0.08);
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; color: var(--text-primary); }
p { margin: 0; }
a { color: var(--primary); text-decoration: none; transition: color 0.18s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; }
button { font-family: inherit; }
.grid-container { max-width: 1200px; padding-left: 16px; padding-right: 16px; }
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 4px 12px rgba(240, 140, 62, 0.22);
}
.btn-accent:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(240, 140, 62, 0.3);
}
.btn-accent:active { transform: translateY(0); opacity: 0.9; }
.btn-accent:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 18px rgba(23, 50, 77, 0.07); }
.header-inner {
  max-width: 1200px;
  height: 72px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--primary);
  display: block;
  position: relative;
}
.logo-icon::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 3px;
  background: var(--primary-light);
}
.logo-text { font-size: 20px; font-weight: 700; letter-spacing: 0.5px; color: var(--text-primary); }
.logo:hover .logo-text { color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 20px; }
.main-nav ul { list-style: none; display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; }
.main-nav ul a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  transition: color 0.18s ease, background 0.18s ease;
}
.main-nav ul a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav ul a.active { color: var(--primary); background: var(--primary-light); }
.main-nav ul a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.nav-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 3px 10px rgba(240, 140, 62, 0.18);
}
.nav-cta a:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(240, 140, 62, 0.26); }
.nav-cta a:active { transform: translateY(0); opacity: 0.9; }
.nav-cta a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.18s ease;
}
.nav-toggle:hover { background: var(--primary-light); }
.nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.nav-toggle span { display: block; height: 2px; width: 24px; background: var(--text-primary); border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.article-main { padding-top: 72px; }
.article-wrap { max-width: 760px; margin: 0 auto; padding: 56px 16px 0; }
.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 44px 48px;
}
.article-title { font-size: 34px; line-height: 1.35; font-weight: 700; margin-bottom: 6px; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  margin: 12px 0 20px;
  padding: 0;
}
.breadcrumb a { color: var(--text-secondary); transition: color 0.18s ease; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: #A8BCC9; font-size: 12px; }
.breadcrumb-current {
  color: var(--text-secondary);
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 14px;
}
.meta-item i { color: var(--primary); font-size: 14px; }
.article-excerpt {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 18px 22px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 28px;
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.75;
}
.article-content { font-size: 16px; line-height: 1.75; color: var(--text-primary); }
.article-content h2 {
  font-size: 26px;
  font-weight: 600;
  margin: 42px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.article-content h3 { font-size: 21px; font-weight: 600; margin: 34px 0 14px; }
.article-content p { margin: 0 0 20px; line-height: 1.8; }
.article-content ul, .article-content ol { margin: 0 0 20px; padding-left: 26px; }
.article-content li { margin-bottom: 10px; line-height: 1.7; }
.article-content li::marker { color: var(--primary); }
.article-content blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  border-radius: 0 8px 8px 0;
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.7;
}
.article-content img {
  border-radius: var(--radius-lg);
  margin: 28px auto;
  box-shadow: var(--shadow-sm);
  display: block;
}
.article-content strong { font-weight: 600; color: var(--primary-dark); }
.article-content em { font-style: italic; color: var(--text-secondary); }
.article-content code {
  background: var(--primary-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  color: var(--primary-dark);
}
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: var(--primary-dark); }
.content-not-found { padding: 48px 0; text-align: center; }
.content-not-found p { font-size: 18px; color: var(--text-secondary); margin-bottom: 16px; }
.content-not-found a {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 26px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.18s ease, transform 0.18s ease;
}
.content-not-found a:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }
.related-section { padding: 96px 0 72px; }
.section-title {
  font-size: 30px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 40px;
}
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 36px; }
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}
.related-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.related-card:active { transform: translateY(0); opacity: 0.95; }
.related-card-img { height: 168px; overflow: hidden; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.related-card:hover .related-card-img img { transform: scale(1.03); }
.related-card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.related-card-body h3 { font-size: 17px; font-weight: 600; line-height: 1.4; color: var(--text-primary); transition: color 0.18s ease; }
.related-card:hover .related-card-body h3 { color: var(--primary); }
.related-card-body p { font-size: 14px; line-height: 1.65; color: var(--text-secondary); }
.back-list { text-align: center; }
.back-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: 999px;
  transition: color 0.18s ease, background 0.18s ease;
}
.back-list a:hover { color: var(--primary); background: var(--primary-light); }
.back-list a i { font-size: 12px; }
.sticky-cta {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  width: 100%;
  max-width: 680px;
  padding: 0 16px;
}
.sticky-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 26px rgba(23, 50, 77, 0.13);
  border: 1px solid var(--border);
  padding: 12px 14px 12px 26px;
}
.sticky-cta-text { font-size: 15px; font-weight: 500; color: var(--text-primary); }
.sticky-cta .btn-accent { height: 42px; padding: 0 24px; font-size: 14px; white-space: nowrap; }
.sticky-cta .btn-accent:hover { transform: translateY(-1px); }
.site-footer {
  background: #12283A;
  color: #A7B8C7;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 44px;
  padding-bottom: 48px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon { width: 26px; height: 26px; border-radius: 7px; background: var(--primary); display: block; position: relative; }
.footer-logo .logo-icon::after { content: ""; position: absolute; inset: 5px; border-radius: 3px; background: var(--primary-light); }
.footer-logo .logo-text { color: #fff; font-size: 20px; font-weight: 700; }
.footer-desc { font-size: 14px; line-height: 1.7; color: #8FA3B5; max-width: 330px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: #A7B8C7; transition: color 0.18s ease; }
.footer-col ul a:hover { color: #fff; }
.footer-contact p { font-size: 13px; line-height: 1.7; margin-bottom: 10px; color: #8FA3B5; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0 110px;
  font-size: 13px;
  color: #7895A8;
  text-align: center;
}
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .related-card-img { height: 140px; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 16px 20px 20px;
    display: none;
    box-shadow: 0 12px 28px rgba(23, 50, 77, 0.1);
    border-bottom: 1px solid var(--border);
  }
  .main-nav.open { display: flex; }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav ul a { display: block; padding: 12px 16px; border-radius: 8px; }
  .nav-cta a { width: 100%; justify-content: center; }
  .article-card { padding: 32px 28px; }
  .article-title { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card-img { height: 190px; }
}
@media (max-width: 640px) {
  .article-main { padding-top: 72px; }
  .article-wrap { padding: 36px 12px 0; }
  .article-card { padding: 24px 20px; border-radius: 10px; }
  .article-title { font-size: 24px; }
  .article-meta { gap: 12px; row-gap: 8px; font-size: 13px; }
  .meta-item { font-size: 13px; }
  .breadcrumb { font-size: 12px; }
  .breadcrumb-current { max-width: 160px; }
  .article-excerpt { padding: 14px 16px; font-size: 14px; }
  .article-content h2 { font-size: 22px; }
  .article-content h3 { font-size: 18px; }
  .related-section { padding: 64px 0 48px; }
  .section-title { font-size: 26px; margin-bottom: 28px; }
  .related-card-img { height: 160px; }
  .sticky-cta { bottom: 10px; padding: 0 10px; }
  .sticky-cta-inner { padding: 8px; gap: 10px; }
  .sticky-cta-text { display: none; }
  .sticky-cta .btn-accent { width: 100%; padding: 0 16px; }
  .footer-bottom { padding: 20px 0 90px; }
}
@media (max-width: 520px) {
  .logo-text { font-size: 18px; }
  .header-inner { padding: 0 12px; gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer { padding: 48px 0 0; }
  .article-content { font-size: 15px; }
  .article-content p { margin-bottom: 18px; }
}