/* roulang page: index */
:root {
  --bg: #F6F9FC;
  --surface: #FFFFFF;
  --primary: #2E6FB6;
  --primary-deep: #1F4E80;
  --primary-soft: #EAF3FB;
  --accent: #E08A3C;
  --ink: #1A2E45;
  --ink-2: #5B7286;
  --line: #DFE8F0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16,42,67,.04), 0 10px 24px rgba(16,42,67,.06);
  --shadow-lg: 0 4px 8px rgba(16,42,67,.06), 0 16px 32px rgba(16,42,67,.10);
  --container: 1200px;
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
}

a { text-decoration: none; color: var(--primary); transition: color .2s ease; }
a:hover { color: var(--primary-deep); }

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

ul, ol { list-style: none; }

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

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 30px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-deep);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46,111,182,.28);
}

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

.btn-outline:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
}

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

.btn-white:hover {
  background: var(--primary-soft);
  color: var(--primary-deep);
  transform: translateY(-2px);
}

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

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 10px;
  letter-spacing: .5px;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.main-nav .nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 2px;
  transition: color .2s;
}

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

.main-nav .nav-link.active {
  color: var(--primary);
}

.main-nav .nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: all .3s;
}

.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: linear-gradient(180deg, #EAF3FB 0%, #F7FBFE 100%);
  padding: 72px 0 80px;
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-content {
  flex: 1;
  max-width: 580px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--primary-deep);
  font-weight: 500;
  margin-bottom: 22px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 17px;
  color: var(--ink-2);
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--primary-soft);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 540px;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}

.hero-visual:hover img {
  transform: scale(1.02);
}

/* 统计数据 */
.stats-section {
  padding: 56px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  box-shadow: var(--shadow-sm);
}

.stat-item {
  text-align: center;
  padding: 0 16px;
  border-right: 1px solid var(--line);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 14px;
  color: var(--ink-2);
  margin-top: 6px;
}

/* 卖点 */
.section {
  padding: 96px 0;
}

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

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--ink-2);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}

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

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  background: var(--primary-soft);
  border-radius: 14px;
  color: var(--primary);
  margin-bottom: 22px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.7;
}

/* 场景 */
.scenarios-section {
  background: var(--surface);
  padding: 96px 0;
}

.scenario-card {
  display: flex;
  align-items: center;
  gap: 56px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
  transition: box-shadow .3s, transform .3s;
}

.scenario-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.scenario-card.reverse {
  flex-direction: row-reverse;
}

.scenario-media {
  flex: 1;
  min-height: 320px;
  background: var(--primary-soft);
  overflow: hidden;
}

.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scenario-content {
  flex: 1;
  padding: 40px 48px;
}

.scenario-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 18px;
}

.scenario-content h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 14px;
}

.scenario-content p {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.7;
  margin-bottom: 24px;
}

.scenario-link {
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.scenario-link:hover {
  gap: 10px;
}

/* 资讯 */
.news-section {
  padding: 96px 0;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform .25s, box-shadow .25s;
}

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

.news-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 14px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 16px;
}

.news-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card h3 a {
  color: inherit;
}

.news-card p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
}

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.news-meta time {
  font-size: 13px;
  color: var(--ink-2);
}

.news-meta a {
  font-size: 13px;
  font-weight: 600;
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
  color: var(--ink-2);
  font-size: 15px;
}

/* 客户评价 */
.testimonials-section {
  background: var(--bg);
  padding: 96px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}

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

.stars {
  color: #F5B944;
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-card blockquote {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.75;
  margin-bottom: 22px;
}

.testimonial-card footer {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.avatar-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.client-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.client-role {
  font-size: 13px;
  color: var(--ink-2);
}

/* FAQ */
.faq-section {
  padding: 96px 0;
  background: var(--surface);
}

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow .25s;
}

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

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

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

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-style: normal;
  transition: transform .3s, background .3s, color .3s;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s;
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 22px;
}

/* CTA 区 */
.cta-section {
  background: linear-gradient(180deg, #F6F9FC 0%, #EAF3FB 100%);
  padding: 96px 0 120px;
}

.cta-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.cta-inner > p {
  font-size: 16px;
  color: var(--ink-2);
  margin-bottom: 40px;
}

.cta-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  text-align: left;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

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

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(46,111,182,.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  grid-column: 1 / -1;
  text-align: center;
  margin-top: 6px;
}

.form-hint {
  font-size: 13px;
  color: var(--ink-2);
  margin-top: 12px;
}

/* 页脚 */
.site-footer {
  background: #0F2235;
  color: #A8B8C8;
  padding: 72px 0 100px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.footer-brand .brand-icon {
  background: #fff;
  color: var(--primary-deep);
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #8FA3B8;
  margin-bottom: 20px;
  max-width: 360px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #8FA3B8;
  font-size: 14px;
}

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

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #8FA3B8;
  margin-bottom: 14px;
}

.footer-contact .icon {
  width: 18px;
  text-align: center;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #6E8498;
}

/* 底部固定转化条 */
.float-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--primary-deep);
  color: #fff;
  transform: translateY(100%);
  opacity: 0;
  transition: transform .35s ease, opacity .35s ease;
  box-shadow: 0 -4px 20px rgba(15,34,53,.15);
}

.float-cta.visible {
  transform: translateY(0);
  opacity: 1;
}

.float-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}

.float-cta-inner p {
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 响应式 */
@media (max-width: 1023px) {
  .hero h1 { font-size: 36px; }
  .hero-inner { flex-direction: column; }
  .hero-visual { max-width: 100%; width: 100%; min-height: 300px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .stat-item { border-right: none; }
  .features-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .feature-card { padding: 28px 20px; }
  .scenario-card, .scenario-card.reverse { flex-direction: column; gap: 24px; }
  .scenario-media { width: 100%; min-height: 260px; }
  .scenario-content { padding: 24px 28px 36px; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .container { padding: 0 20px; }
  body { font-size: 15px; }
  .section { padding: 56px 0; }
  .scenarios-section { padding: 56px 0; }
  .news-section { padding: 56px 0; }
  .testimonials-section { padding: 56px 0; }
  .faq-section { padding: 56px 0; }
  .cta-section { padding: 56px 0 100px; }

  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 16px 24px 28px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(16,42,67,.08);
    transform: translateY(-120%);
    transition: transform .35s ease;
    z-index: 99;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .main-nav .nav-link {
    display: block;
    width: 100%;
    padding: 14px 0;
    font-size: 16px;
    line-height: 1.4;
    border-bottom: 1px solid var(--line);
  }

  .main-nav .nav-link:last-child {
    border-bottom: none;
  }

  .main-nav .nav-link.active::after {
    display: none;
  }

  .nav-toggle { display: flex; }
  .nav-cta { display: none; }

  .hero { padding: 48px 0 56px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-visual { min-height: 220px; }

  .stats-section { padding: 32px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); padding: 28px 16px; }

  .features-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }

  .news-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }

  .cta-form { grid-template-columns: 1fr; padding: 24px; }
  .form-group.full, .form-submit { grid-column: 1; }

  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .site-footer { padding: 56px 0 100px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .float-cta-inner { height: 56px; }
  .float-cta-inner p { font-size: 13px; max-width: 70%; }
  .float-cta .btn { padding: 9px 18px; font-size: 13px; }
}

/* roulang page: category1 */
:root {
  --bg: #F6F9FC;
  --surface: #FFFFFF;
  --primary: #2E6FB6;
  --primary-deep: #1F4E80;
  --primary-soft: #EAF3FB;
  --accent: #E08A3C;
  --ink: #1A2E45;
  --ink-2: #5B7286;
  --line: #DFE8F0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16,42,67,.04), 0 10px 24px rgba(16,42,67,.06);
  --shadow-hover: 0 4px 8px rgba(16,42,67,.06), 0 16px 32px rgba(16,42,67,.10);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); font-size: 15px; line-height: 1.75; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--primary-deep); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  height: 68px;
  display: flex;
  align-items: center;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 8px; font-size: 14px; font-weight: 800; letter-spacing: .5px; }
.brand-name { white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { padding: 8px 14px; font-size: 15px; color: var(--ink-2); border-radius: 8px; font-weight: 500; transition: all .25s ease; }
.nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.nav-link.active { color: var(--primary); background: var(--primary-soft); font-weight: 600; }
.nav-cta { margin-left: 8px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border-radius: var(--radius-md); font-size: 15px; font-weight: 600; border: 1px solid transparent; transition: all .25s ease; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 8px rgba(46,111,182,.25); }
.btn-primary:hover { background: var(--primary-deep); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(31,78,128,.30); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-soft); color: var(--primary-deep); border-color: var(--primary-deep); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary-deep); }
.btn-white:hover { background: #edf4fc; color: var(--primary-deep); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #c9742a; color: #fff; transform: translateY(-2px); }
.nav-toggle { display: none; background: none; border: none; width: 44px; height: 44px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border-radius: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: all .3s ease; }

/* Page Hero */
.page-hero {
  background: linear-gradient(180deg, #EAF3FB 0%, #F7FBFE 100%);
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(46,111,182,.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.breadcrumb { font-size: 14px; color: var(--ink-2); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: var(--ink-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #b6c8d8; }
.page-hero h1 { font-size: 40px; font-weight: 700; margin-bottom: 12px; letter-spacing: -.5px; }
.page-hero .subtitle { font-size: 17px; color: var(--ink-2); max-width: 720px; line-height: 1.75; }

/* Section */
.section { padding: var(--space-section) 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head .tag { display: inline-block; background: var(--primary-soft); color: var(--primary); font-size: 13px; font-weight: 600; padding: 4px 16px; border-radius: 999px; margin-bottom: 14px; }
.section-head h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; letter-spacing: -.3px; }
.section-head p { font-size: 15px; color: var(--ink-2); line-height: 1.7; }

/* Product Cards */
.product-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; margin-bottom: 40px; display: flex; flex-direction: column; transition: box-shadow .35s ease, transform .35s ease; }
.product-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.product-card-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.product-card.reverse .product-card-inner { direction: rtl; }
.product-card.reverse .product-body { direction: ltr; }
.product-img { position: relative; min-height: 320px; overflow: hidden; }
.product-img img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; transition: transform .6s ease; }
.product-card:hover .product-img img { transform: scale(1.03); }
.product-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(16,42,67,.18) 0%, transparent 50%); pointer-events: none; }
.product-body { padding: 44px 44px 36px; display: flex; flex-direction: column; justify-content: center; }
.product-body .card-tag { display: inline-block; background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 999px; margin-bottom: 14px; letter-spacing: .3px; }
.product-body h3 { font-size: 24px; font-weight: 700; margin-bottom: 10px; }
.product-body .desc { font-size: 15px; color: var(--ink-2); line-height: 1.75; margin-bottom: 24px; }
.spec-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; border-top: 1px solid var(--line); padding-top: 24px; }
.spec-item { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--ink-2); line-height: 1.5; }
.spec-item::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); margin-top: 7px; flex-shrink: 0; }
.spec-item strong { color: var(--ink); font-weight: 600; margin-right: 2px; }

/* Param Standards */
.param-section { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.param-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.param-item { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px 28px; transition: all .3s ease; }
.param-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); background: var(--surface); }
.param-icon { width: 48px; height: 48px; background: var(--primary-soft); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 18px; }
.param-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.param-item p { font-size: 14px; color: var(--ink-2); line-height: 1.7; }

/* Scenes */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scene-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: all .3s ease; }
.scene-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.scene-card .scene-img { height: 150px; overflow: hidden; position: relative; }
.scene-card .scene-img img { width: 100%; height: 100%; object-fit: cover; }
.scene-card .scene-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(16,42,67,.30) 100%); }
.scene-body { padding: 24px 20px 22px; }
.scene-body h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.scene-body p { font-size: 14px; color: var(--ink-2); line-height: 1.65; }

/* Process */
.process-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: all .3s ease; }
.process-step:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.step-num { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 18px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.process-step h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--ink-2); line-height: 1.65; }

/* CTA */
.cta-section { background: linear-gradient(135deg, #1F4E80 0%, #2E6FB6 100%); padding: 64px 0; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat; opacity: .12; }
.cta-inner { position: relative; text-align: center; max-width: 760px; margin: 0 auto; }
.cta-inner h2 { color: #fff; font-size: 30px; font-weight: 700; margin-bottom: 14px; }
.cta-inner p { color: rgba(255,255,255,.85); font-size: 16px; line-height: 1.7; margin-bottom: 32px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.cta-form { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 12px; align-items: center; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.20); padding: 20px; border-radius: var(--radius-lg); backdrop-filter: blur(4px); }
.cta-form input { height: 44px; border: 1px solid rgba(255,255,255,.30); background: rgba(255,255,255,.95); border-radius: var(--radius-md); padding: 0 14px; font-size: 14px; color: var(--ink); outline: none; transition: all .25s ease; width: 100%; }
.cta-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(224,138,60,.18); }
.cta-form input::placeholder { color: #8ba0b5; }
.cta-form .btn { height: 44px; padding: 0 28px; }

/* FAQ */
.faq-section { background: var(--surface); border-top: 1px solid var(--line); }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; overflow: hidden; background: var(--surface); transition: box-shadow .3s ease; }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question { width: 100%; background: none; border: none; padding: 22px 24px; font-size: 16px; font-weight: 600; color: var(--ink); display: flex; align-items: center; justify-content: space-between; gap: 16px; text-align: left; transition: color .25s ease; }
.faq-question:hover { color: var(--primary); }
.faq-icon { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-size: 18px; font-weight: 400; flex-shrink: 0; transition: all .35s ease; }
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .3s ease; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 22px; }
.faq-answer p { font-size: 15px; color: var(--ink-2); line-height: 1.7; }

/* Footer */
.site-footer { background: #0F2235; color: #9bb3c9; padding-top: 64px; padding-bottom: 96px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; }
.footer-brand .brand { color: #fff; margin-bottom: 16px; font-size: 20px; }
.footer-brand .brand-icon { background: #2563a0; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: #8aa5bd; }
.footer-col h5 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: #8aa5bd; font-size: 14px; transition: all .25s ease; }
.footer-col ul li a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: #8aa5bd; margin-bottom: 12px; line-height: 1.6; }
.footer-contact li .icon { color: #60a5d6; font-weight: 700; flex-shrink: 0; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.10); text-align: center; font-size: 14px; color: #6f8aa3; }

/* Fixed CTA bar */
.fixed-bar { position: fixed; bottom: 0; left: 0; right: 0; background: var(--primary-deep); padding: 10px 24px; z-index: 200; display: flex; align-items: center; justify-content: center; gap: 24px; box-shadow: 0 -4px 16px rgba(16,42,67,.12); }
.fixed-bar .bar-text { color: rgba(255,255,255,.90); font-size: 15px; font-weight: 500; }
.fixed-bar .btn { height: 40px; padding: 0 24px; font-size: 14px; }
.fixed-bar .btn-accent { box-shadow: 0 2px 12px rgba(224,138,60,.30); }

/* Responsive */
@media (max-width: 1024px) {
  :root { --space-section: 72px; }
  .param-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .process-wrap { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .product-card-inner { grid-template-columns: 1fr; }
  .product-img img { position: relative; }
  .product-img { min-height: 260px; }
  .product-card.reverse .product-card-inner { direction: ltr; }
  .cta-form { grid-template-columns: 1fr 1fr; }
  .cta-form .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-cta { display: none; }
  .main-nav { position: fixed; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 16px 24px 28px; gap: 4px; border-bottom: 1px solid var(--line); box-shadow: 0 24px 32px rgba(16,42,67,.08); transform: translateY(-120%); opacity: 0; transition: all .4s ease; max-height: calc(100vh - 68px); overflow-y: auto; }
  .main-nav.active { transform: translateY(0); opacity: 1; }
  .nav-link { display: block; padding: 14px 12px; font-size: 16px; border-radius: 10px; }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  .page-hero { padding: 40px 0 48px; }
  .page-hero h1 { font-size: 32px; }
  .page-hero .subtitle { font-size: 16px; }
  .section-head h2 { font-size: 26px; }
  .spec-list { grid-template-columns: 1fr; }
  .product-body { padding: 28px 24px; }
  .fixed-bar .bar-text { display: none; }
  .site-footer { padding-bottom: 80px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 520px) {
  :root { --space-section: 56px; }
  .container { padding-left: 18px; padding-right: 18px; }
  .brand-name { font-size: 16px; }
  .brand-icon { width: 32px; height: 32px; font-size: 13px; }
  .page-hero h1 { font-size: 27px; }
  .section-head h2 { font-size: 23px; }
  .param-grid, .scene-grid { grid-template-columns: 1fr; }
  .process-wrap { grid-template-columns: 1fr; }
  .cta-form { grid-template-columns: 1fr; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons .btn { width: 100%; }
}

/* roulang page: article */
:root {
  --bg: #F6F9FC;
  --surface: #FFFFFF;
  --primary: #2E6FB6;
  --primary-deep: #1F4E80;
  --primary-soft: #EAF3FB;
  --accent: #E08A3C;
  --ink: #1A2E45;
  --ink-2: #5B7286;
  --line: #DFE8F0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-default: 0 1px 2px rgba(16,42,67,.04), 0 10px 24px rgba(16,42,67,.06);
  --shadow-hover: 0 4px 8px rgba(16,42,67,.06), 0 16px 32px rgba(16,42,67,.10);
  --container: 1200px;
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-family); font-size: 15px; line-height: 1.75; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-deep); }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }

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

/* ===== Button ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 22px; border-radius: var(--radius-md);
  font-size: 15px; font-weight: 600; line-height: 1.4;
  border: 1px solid transparent; cursor: pointer;
  transition: background .25s, color .25s, transform .25s, box-shadow .25s, border-color .25s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-deep); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #c9722a; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-light { background: rgba(255,255,255,.15); color: #fff; border-color: rgba(255,255,255,.5); }
.btn-light:hover { background: rgba(255,255,255,.25); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(46,111,182,.07); color: var(--primary-deep); }
.btn-block { width: 100%; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: .5px;
  display: inline-flex; align-items: center; justify-content: center;
}
.brand-name { font-size: 18px; font-weight: 700; color: var(--ink); white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 26px; flex: 1; }
.nav-link { color: var(--ink-2); font-size: 15px; font-weight: 500; position: relative; padding: 6px 2px; white-space: nowrap; }
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px;
  background: var(--primary); border-radius: 2px;
}
.nav-cta { margin-left: auto; }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .25s; }

/* ===== Article Banner ===== */
.article-banner {
  background: linear-gradient(180deg, rgba(234,243,251,.94), rgba(247,251,254,.88)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding: 54px 0 44px;
  border-bottom: 1px solid var(--line);
}
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--ink-2); margin-bottom: 22px; }
.breadcrumb a { color: var(--ink-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #B8C9D8; }
.breadcrumb .current { color: var(--ink); font-weight: 600; max-width: 520px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.article-heading h1 {
  font-size: 38px; font-weight: 700; line-height: 1.3; color: var(--ink);
  max-width: 880px; margin-bottom: 18px; letter-spacing: -.5px;
}
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-2); }
.article-meta span + span::before { content: '·'; margin: 0 10px; color: #C3D2DF; }

/* ===== Article Content ===== */
.article-content-section { padding: 56px 0 32px; }
.article-container { max-width: 820px; margin: 0 auto; }

.article-body {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 48px 54px;
  box-shadow: var(--shadow-default);
}
.article-body > * + * { margin-top: 20px; }
.article-body h2 {
  font-size: 26px; font-weight: 700; color: var(--ink);
  padding-bottom: 10px; border-bottom: 2px solid var(--primary-soft); margin-top: 36px;
}
.article-body h3 { font-size: 21px; font-weight: 600; color: var(--ink); margin-top: 28px; }
.article-body h4 { font-size: 18px; font-weight: 600; color: var(--ink); margin-top: 22px; }
.article-body p { color: var(--ink); line-height: 1.85; }
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body li { margin-bottom: 8px; color: var(--ink); line-height: 1.75; }
.article-body blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-soft);
  padding: 16px 20px; margin: 24px 0; border-radius: 0 10px 10px 0;
  color: var(--ink-2); font-size: 15px;
}
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-body th, .article-body td { padding: 11px 14px; border: 1px solid var(--line); text-align: left; }
.article-body th { background: var(--primary-soft); font-weight: 600; color: var(--ink); }
.article-body img { border-radius: 12px; margin: 24px 0; object-fit: cover; }
.article-body hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }
.article-body code { background: #F2F6FA; border-radius: 4px; padding: 2px 7px; font-size: 13px; color: var(--primary-deep); font-family: "SF Mono", "Consolas", monospace; }
.article-body pre { background: #0F2235; color: #E7F0F8; border-radius: 12px; padding: 18px 20px; overflow-x: auto; font-size: 13px; line-height: 1.65; margin: 24px 0; }
.article-body pre code { background: none; color: inherit; padding: 0; }
.article-body a { text-decoration: underline; text-underline-offset: 3px; }

/* ===== Article Tags ===== */
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--line); }
.tag-label { font-size: 14px; color: var(--ink-2); }
.article-tag {
  display: inline-block; background: var(--primary-soft); color: var(--primary);
  font-size: 13px; font-weight: 500; padding: 5px 15px; border-radius: var(--radius-pill);
  transition: background .2s, color .2s;
}
.article-tag:hover { background: var(--primary); color: #fff; }

/* ===== Prev Next ===== */
.article-prev-next { display: flex; gap: 16px; margin-top: 24px; }
.pn-item {
  flex: 1; background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 20px;
  display: flex; flex-direction: column; gap: 5px;
  transition: box-shadow .25s, transform .25s;
}
.pn-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.pn-label { font-size: 13px; color: var(--ink-2); }
.pn-title { font-size: 15px; font-weight: 500; color: var(--ink); line-height: 1.4; }
.pn-item.next { text-align: right; }

/* ===== Article Empty ===== */
.article-empty {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 72px 40px; text-align: center; box-shadow: var(--shadow-default);
}
.article-empty p { font-size: 17px; color: var(--ink-2); margin-bottom: 20px; }

/* ===== Related ===== */
.related-section { padding: 64px 0; background: var(--surface); border-top: 1px solid var(--line); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.section-head p { font-size: 15px; color: var(--ink-2); }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: box-shadow .3s, transform .3s;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.news-cover { height: 180px; overflow: hidden; flex-shrink: 0; }
.news-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s; }
.news-card:hover .news-cover img { transform: scale(1.05); }
.news-info { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.news-tag {
  align-self: flex-start; background: var(--primary-soft); color: var(--primary);
  font-size: 12px; font-weight: 600; padding: 4px 13px; border-radius: var(--radius-pill);
}
.news-info h3 { font-size: 19px; font-weight: 600; color: var(--ink); line-height: 1.45; margin: 12px 0 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-info p { font-size: 14px; color: var(--ink-2); line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; } 
.news-meta { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--ink-2); margin-top: auto; }

/* ===== FAQ ===== */
.faq-section { padding: 64px 0; background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 0; margin-bottom: 12px;
  overflow: hidden; transition: box-shadow .25s;
}
.faq-item:hover { box-shadow: var(--shadow-default); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  background: none; border: none; padding: 18px 22px;
  font-size: 16px; font-weight: 600; color: var(--ink); cursor: pointer; text-align: left;
}
.faq-q .faq-icon { font-size: 20px; color: var(--primary); transition: transform .3s; line-height: 1; }
.faq-item.open .faq-q .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 22px 20px; font-size: 14px; color: var(--ink-2); line-height: 1.75; }

/* ===== CTA ===== */
.cta-section { padding: 72px 0; background: linear-gradient(135deg, #1F4E80 0%, #14324E 100%); }
.cta-card {
  display: flex; gap: 48px; align-items: center; justify-content: space-between;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  border-radius: var(--radius-lg); padding: 48px 56px;
  box-shadow: 0 20px 40px rgba(16,42,67,.22);
}
.cta-content { flex: 1; }
.cta-content h2 { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,.88); margin-bottom: 24px; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.cta-form {
  width: 350px; flex-shrink: 0;
  background: rgba(255,255,255,.14);
  border-radius: 14px; padding: 26px;
  display: flex; flex-direction: column; gap: 12px;
}
.cta-form input, .cta-form textarea {
  background: #fff; border: 1px solid transparent; border-radius: var(--radius-md);
  padding: 11px 14px; font-size: 14px; color: var(--ink); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.cta-form input:focus, .cta-form textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(224,138,60,.22); }
.cta-form textarea { resize: vertical; min-height: 60px; }
.cta-form .btn { margin-top: 4px; }

/* ===== Footer ===== */
.site-footer { background: #0F2235; color: rgba(255,255,255,.72); padding: 60px 0 96px; }
.footer-main { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 48px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .brand-icon { background: var(--primary); }
.footer-logo .brand-text { color: #fff; font-size: 17px; font-weight: 600; }
.footer-brand p { font-size: 14px; line-height: 1.75; color: rgba(255,255,255,.6); }
.site-footer h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.site-footer a { display: block; color: rgba(255,255,255,.62); font-size: 14px; padding: 5px 0; transition: color .2s; }
.site-footer a:hover { color: #fff; }
.footer-contact p { font-size: 14px; padding: 4px 0; color: rgba(255,255,255,.55); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 52px; padding-top: 24px;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,.4);
}

/* ===== Fixed CTA Bar ===== */
.mobile-cta-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 80;
  background: rgba(255,255,255,.97);
  border-top: 1px solid var(--line);
  padding: 10px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  transform: translateY(100%); opacity: 0;
  transition: transform .35s ease, opacity .35s ease;
}
.mobile-cta-bar.show { transform: translateY(0); opacity: 1; }
.mobile-cta-bar p { font-size: 14px; font-weight: 600; color: var(--ink); margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav { gap: 18px; }
  .cta-card { flex-direction: column; padding: 36px; }
  .cta-form { width: 100%; }
  .footer-main { grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
  .footer-contact { grid-column: span 3; }
}

@media (max-width: 768px) {
  .header-inner { gap: 12px; }
  .main-nav {
    position: fixed; top: 68px; right: 0; width: 280px; height: calc(100vh - 68px);
    background: #fff; flex-direction: column; align-items: flex-start;
    padding: 28px 28px; gap: 8px;
    box-shadow: -10px 0 30px rgba(16,42,67,.08);
    transform: translateX(100%); transition: transform .3s ease;
    overflow-y: auto; z-index: 99;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav .nav-link { font-size: 16px; padding: 10px 0; width: 100%; }
  .main-nav .nav-link.active::after { display: none; }
  .main-nav .nav-link.active { color: var(--primary); font-weight: 600; }
  .main-nav .btn { margin-top: 16px; width: 100%; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }

  .article-banner { padding: 36px 0 28px; }
  .article-heading h1 { font-size: 27px; }
  .article-body { padding: 28px 20px; }
  .article-body h2 { font-size: 22px; }
  .article-prev-next { flex-direction: column; }

  .news-grid { grid-template-columns: 1fr; gap: 18px; }
  .related-section { padding: 48px 0; }
  .faq-section { padding: 48px 0; }
  .cta-section { padding: 48px 0; }
  .cta-card { padding: 28px 20px; }
  .cta-content h2 { font-size: 24px; }

  .footer-main { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: span 2; }
  .footer-contact { grid-column: span 2; }
}

@media (max-width: 520px) {
  .header-inner { gap: 8px; }
  .brand-name { font-size: 15px; }
  .brand-icon { width: 34px; height: 34px; font-size: 12px; }
  .container { padding: 0 16px; }
  .article-meta { font-size: 13px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-contact { grid-column: auto; }
  .mobile-cta-bar p { font-size: 13px; }
}

/* roulang page: category2 */
:root{
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --primary:#2E6FB6;
  --primary-deep:#1F4E80;
  --primary-soft:#EAF3FB;
  --accent:#E08A3C;
  --ink:#1A2E45;
  --ink-2:#5B7286;
  --line:#DFE8F0;
  --radius-lg:16px;
  --radius-md:10px;
  --shadow:0 1px 2px rgba(16,42,67,.04),0 10px 24px rgba(16,42,67,.06);
  --shadow-hover:0 4px 8px rgba(16,42,67,.06),0 16px 32px rgba(16,42,67,.10);
  --font:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:15px;line-height:1.75;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-deep)}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px}
.section-head .tag{display:inline-block;font-size:13px;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:4px 16px;margin-bottom:14px;font-weight:600}
.section-head h2{font-size:32px;font-weight:700;line-height:1.3;color:var(--ink)}
.section-head p{font-size:16px;color:var(--ink-2);margin-top:14px}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;height:68px;gap:32px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;letter-spacing:.5px}
.brand-name{font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.main-nav .nav-link{font-size:15px;color:var(--ink-2);font-weight:500;padding:6px 2px;position:relative;transition:color .2s}
.main-nav .nav-link:hover{color:var(--ink)}
.main-nav .nav-link.active{color:var(--primary);font-weight:600}
.main-nav .nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--primary)}
.nav-cta{margin-left:8px;flex-shrink:0}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;background:transparent;border:1px solid var(--line);border-radius:8px;cursor:pointer;padding:8px;transition:border-color .2s}
.nav-toggle span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.nav-toggle:hover{border-color:var(--primary)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;border-radius:var(--radius-md);padding:12px 24px;border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;font-family:var(--font)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(46,111,182,.25)}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px rgba(46,111,182,.3)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-deep);transform:translateY(-2px)}
.btn-lg{padding:14px 32px;font-size:16px}

/* page hero */
.page-hero{background:linear-gradient(180deg,#EAF3FB,#F7FBFE);padding:72px 0 64px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;right:-120px;top:-80px;width:360px;height:360px;border-radius:50%;background:rgba(46,111,182,.08)}
.page-hero::after{content:"";position:absolute;left:-80px;bottom:-120px;width:280px;height:280px;border-radius:50%;background:rgba(224,138,60,.06)}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:20px}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line);font-weight:300}
.page-hero h1{font-size:40px;font-weight:700;line-height:1.25;color:var(--ink);margin-bottom:16px}
.page-hero .hero-desc{font-size:17px;color:var(--ink-2);max-width:720px;line-height:1.8}

/* scenario blocks */
.scenario-block{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:80px}
.scenario-block:last-child{margin-bottom:0}
.scenario-block.reverse .scenario-img{order:2}
.scenario-block.reverse .scenario-info{order:1}
.scenario-info .mini-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:4px 14px;margin-bottom:14px}
.scenario-info h3{font-size:24px;font-weight:700;color:var(--ink);margin-bottom:12px;line-height:1.4}
.scenario-info p{font-size:15px;color:var(--ink-2);margin-bottom:18px;line-height:1.8}
.scenario-info ul li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink);padding:6px 0}
.scenario-info ul li::before{content:"✓";flex-shrink:0;width:20px;height:20px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:3px}
.scenario-img{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);background:var(--primary-soft);min-height:280px}
.scenario-img img{width:100%;height:100%;object-fit:cover;min-height:280px;transition:transform .4s}
.scenario-img:hover img{transform:scale(1.03)}

/* compare table */
.compare-section{background:var(--bg)}
.compare-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.compare-table{width:100%;border-collapse:collapse;font-size:14px}
.compare-table th,.compare-table td{padding:18px 22px;text-align:left;border-bottom:1px solid var(--line);line-height:1.7}
.compare-table tr:last-child td{border-bottom:none}
.compare-table thead th{background:var(--primary-soft);font-size:15px;font-weight:600;color:var(--ink)}
.compare-table thead th:first-child{width:120px}
.compare-table tbody tr{transition:background .2s}
.compare-table tbody tr:hover{background:rgba(234,243,251,.5)}
.compare-table .row-label{font-weight:600;color:var(--primary-deep)}
@media(max-width:768px){
  .compare-table{display:block;overflow-x:auto;white-space:nowrap}
}

/* steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.step-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow);position:relative;transition:transform .2s,box-shadow .2s}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.step-num{font-size:28px;font-weight:800;color:var(--accent);margin-bottom:12px;line-height:1}
.step-item h4{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:8px}
.step-item p{font-size:13px;color:var(--ink-2);line-height:1.7}
.step-item::after{content:"";position:absolute;right:-13px;top:50%;transform:translateY(-50%);width:24px;height:24px;background:var(--bg);border-radius:50%;z-index:2;opacity:.7}
.step-item:last-child::after{display:none}

/* case cards */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.case-card .case-img{height:180px;overflow:hidden;background:var(--primary-soft);position:relative}
.case-card .case-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-card:hover .case-img img{transform:scale(1.04)}
.case-card .case-body{padding:20px 22px 24px}
.case-card .case-tag{display:inline-block;font-size:12px;color:var(--accent);background:rgba(224,138,60,.1);border-radius:999px;padding:3px 12px;font-weight:600;margin-bottom:10px}
.case-card h4{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:10px;line-height:1.4}
.case-card p{font-size:13px;color:var(--ink-2);line-height:1.7}

/* faq */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:box-shadow .2s}
.faq-item.active{box-shadow:var(--shadow)}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 24px;background:transparent;border:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);font-family:var(--font);text-align:left;transition:color .2s}
.faq-question:hover{color:var(--primary)}
.faq-icon{flex-shrink:0;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--primary);transition:transform .3s,background .3s;margin-left:12px}
.faq-item.active .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff;border-color:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 24px 18px;font-size:14px;color:var(--ink-2);line-height:1.8}

/* cta */
.cta-section{padding:80px 0 120px;background:var(--bg)}
.cta-card{background:linear-gradient(135deg,var(--primary-deep),#2c5f93);border-radius:20px;padding:56px 48px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;box-shadow:0 20px 48px rgba(31,78,128,.2);position:relative;overflow:hidden}
.cta-card::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.06)}
.cta-left h2{font-size:28px;font-weight:700;color:#fff;margin-bottom:14px;line-height:1.3}
.cta-left p{font-size:15px;color:rgba(255,255,255,.8);line-height:1.8}
.cta-form{display:flex;flex-direction:column;gap:14px;background:rgba(255,255,255,.08);border-radius:16px;padding:28px;backdrop-filter:blur(4px)}
.cta-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cta-form input,.cta-form textarea{width:100%;padding:12px 14px;border:1px solid rgba(255,255,255,.3);border-radius:var(--radius-md);background:rgba(255,255,255,.95);font-size:14px;font-family:var(--font);color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s}
.cta-form textarea{resize:vertical;min-height:68px}
.cta-form input:focus,.cta-form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(46,111,182,.12)}
.cta-form .btn{width:100%}

/* footer */
.site-footer{background:#0F2235;color:rgba(255,255,255,.7);padding:64px 0 0;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px}
.footer-brand .brand-name{color:#fff;font-size:20px;font-weight:700;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col h5{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.55);transition:color .2s}
.footer-col ul li a:hover{color:#fff}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.55);margin-bottom:10px;display:flex;align-items:flex-start;gap:8px}
.footer-contact li span{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0 100px}
.footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom-inner a{color:rgba(255,255,255,.4);margin-left:16px}
.footer-bottom-inner a:hover{color:#fff}

/* mobile sticky bar */
.mobile-sticky{position:fixed;bottom:0;left:0;right:0;background:var(--primary-deep);z-index:99;display:none;padding:10px 20px;justify-content:space-between;align-items:center;gap:16px;box-shadow:0 -4px 20px rgba(31,78,128,.2)}
.mobile-sticky .sticky-msg{color:rgba(255,255,255,.85);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mobile-sticky .btn{background:#fff;color:var(--primary-deep);padding:8px 20px;font-size:14px;border-radius:8px;flex-shrink:0}

/* responsive */
@media(max-width:1024px){
  .section{padding:72px 0}
  .scenario-block{grid-template-columns:1fr;gap:32px}
  .scenario-block.reverse .scenario-img{order:1}
  .scenario-block.reverse .scenario-info{order:2}
  .steps-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .step-item::after{display:none}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .header-inner{height:60px;gap:16px}
  .nav-toggle{display:flex;margin-left:auto}
  .brand-name{font-size:16px}
  .main-nav{position:fixed;top:60px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:20px 24px 28px;gap:4px;transform:translateY(-120%);opacity:0;pointer-events:none;transition:transform .3s ease,opacity .3s ease;box-shadow:0 20px 40px rgba(16,42,67,.1);border-bottom:1px solid var(--line)}
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav .nav-link{font-size:16px;padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .main-nav .nav-link.active::after{display:none}
  .nav-cta{display:none}
  .page-hero{padding:52px 0 44px}
  .page-hero h1{font-size:30px}
  .page-hero .hero-desc{font-size:15px}
  .section-head h2{font-size:26px}
  .scenario-block{margin-bottom:56px}
  .scenario-info h3{font-size:20px}
  .steps-grid{grid-template-columns:1fr;gap:16px}
  .case-grid{grid-template-columns:1fr}
  .cta-form .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{padding-bottom:72px}
  .footer-bottom-inner{flex-direction:column;gap:8px;text-align:center}
  .mobile-sticky{display:flex}
  .cta-section{padding-bottom:160px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .brand-icon{width:34px;height:34px;font-size:12px}
  .brand-name{font-size:15px}
  .page-hero h1{font-size:26px}
  .section-head p{font-size:14px}
  .compare-table th,.compare-table td{padding:14px 16px}
}

/* roulang page: category3 */
:root {
  --bg: #F6F9FC;
  --surface: #FFFFFF;
  --primary: #2E6FB6;
  --primary-deep: #1F4E80;
  --primary-soft: #EAF3FB;
  --accent: #E08A3C;
  --ink: #1A2E45;
  --ink-2: #5B7286;
  --line: #DFE8F0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow: 0 1px 2px rgba(16,42,67,.04), 0 10px 24px rgba(16,42,67,.06);
  --shadow-lg: 0 4px 8px rgba(16,42,67,.06), 0 16px 32px rgba(16,42,67,.10);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--primary); transition: color .2s; }
a:hover { color: var(--primary-deep); }
ul, ol { list-style: none; }

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

.section-block { padding: 96px 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.4;
  transition: all .25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(46, 111, 182, .25);
}

.btn-primary:hover {
  background: var(--primary-deep);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(46, 111, 182, .32);
}

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

.btn-outline:hover {
  background: var(--primary-soft);
  color: var(--primary-deep);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--primary-deep);
  box-shadow: 0 6px 16px rgba(0, 0, 0, .15);
}

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

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .02em;
  box-shadow: 0 4px 10px rgba(46, 111, 182, .28);
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
  transition: all .2s;
}

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

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

.nav-cta {
  margin-left: 12px;
}

.nav-cta-mobile { display: none; }

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

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}

.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); }

/* ===== 页面Hero ===== */
.page-hero {
  position: relative;
  padding: 80px 0 96px;
  background-size: cover;
  background-position: center;
}

.page-hero .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(234,243,251,.97) 0%, rgba(247,251,254,.93) 55%, rgba(234,243,251,.78) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 20px;
}

.breadcrumb a { color: var(--ink-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--line); }

.page-hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: .01em;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 660px;
  margin: 20px 0 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 通用标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head .tag { margin-bottom: 16px; }

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -.01em;
}

.section-head p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
  margin-top: 16px;
}

.section-head.left {
  text-align: left;
  margin-left: 0;
}

/* ===== 服务范围卡片 ===== */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
  position: relative;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 22px;
}

.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--ink);
}

.service-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ===== 服务流程时间线 ===== */
.service-process {
  background: linear-gradient(180deg, var(--primary-soft), var(--bg));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.process-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 72px;
  align-items: start;
}

.process-left .tag { margin-bottom: 16px; }

.process-left h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 16px;
}

.process-left > p {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 520px;
  line-height: 1.75;
}

.timeline {
  margin-top: 32px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), rgba(46,111,182,.2));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding: 0 0 34px 60px;
}

.timeline-item:last-child { padding-bottom: 0; }

.step-num {
  position: absolute;
  left: 0;
  top: -2px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--primary);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.timeline-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
}

.timeline-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
  max-width: 470px;
}

.process-visual {
  position: relative;
}

.process-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.process-visual::after {
  content: '';
  position: absolute;
  top: 20px;
  left: 20px;
  right: -20px;
  bottom: -20px;
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  opacity: .25;
  z-index: -1;
}

/* ===== 服务标准表格 ===== */
.standard-table-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  max-width: 920px;
  margin: 0 auto;
}

.standard-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.standard-table thead th {
  background: var(--primary-soft);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 18px 24px;
}

.standard-table tbody td {
  padding: 18px 24px;
  font-size: 15px;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
  line-height: 1.7;
}

.standard-table tbody td:first-child {
  color: var(--ink);
  font-weight: 600;
  width: 180px;
}

.standard-table tbody tr:hover td {
  background: rgba(234, 243, 251, .3);
}

.table-note {
  text-align: center;
  font-size: 13px;
  color: var(--ink-2);
  margin-top: 20px;
}

/* ===== FAQ ===== */
.service-faq {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow .25s, border-color .25s;
}

.faq-item.open {
  box-shadow: var(--shadow);
  border-color: rgba(46, 111, 182, .35);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  font-family: inherit;
  transition: background .2s;
}

.faq-q:hover { background: rgba(234, 243, 251, .4); }

.faq-q .q-mark {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-q i {
  margin-left: auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-soft);
  position: relative;
  flex-shrink: 0;
  transition: transform .3s;
}

.faq-q i::before,
.faq-q i::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: translate(-50%, -50%);
}

.faq-q i::after { transform: translate(-50%, -50%) rotate(90deg); }

.faq-item.open .faq-q i { transform: rotate(135deg); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}

.faq-a-inner {
  padding: 0 24px 22px 62px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ===== CTA ===== */
.service-cta {
  background: var(--bg);
}

.cta-box {
  background: linear-gradient(135deg, var(--primary-deep), var(--primary));
  border-radius: 20px;
  padding: 52px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  box-shadow: 0 20px 50px rgba(31, 78, 128, .28);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .07);
  top: -80px;
  right: -60px;
}

.cta-info {
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-info .tag {
  background: rgba(255, 255, 255, .16);
  color: #fff;
}

.cta-info h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: #fff;
  margin: 20px 0 16px;
}

.cta-info p {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .85);
  margin-bottom: 28px;
}

.cta-contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cta-contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, .92);
}

.cta-contact-list li i {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .14);
  display: grid;
  place-items: center;
  font-size: 14px;
  color: #fff;
}

.cta-form {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .12);
  position: relative;
  z-index: 1;
}

.cta-form input,
.cta-form textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--ink);
  font-family: inherit;
  background: var(--bg);
  transition: border-color .2s, box-shadow .2s, background .2s;
  resize: vertical;
}

.cta-form textarea { min-height: 100px; }

.cta-form input:focus,
.cta-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(46, 111, 182, .12);
}

.cta-form .btn {
  margin-top: 6px;
  width: 100%;
}

.form-tip {
  font-size: 13px;
  color: var(--ink-2);
  text-align: center;
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0F2235;
  color: rgba(255, 255, 255, .7);
  padding: 64px 0 100px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  gap: 48px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand .brand-name {
  color: #fff;
}

.footer-brand .brand-icon {
  background: rgba(255, 255, 255, .12);
  color: #fff;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .6);
  max-width: 280px;
}

.footer-title {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.footer-links li {
  margin-bottom: 4px;
}

.footer-links a {
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  line-height: 2.1;
  transition: color .2s, padding-left .2s;
}

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

.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .6);
  margin-bottom: 14px;
}

.footer-contact-list i {
  margin-top: 4px;
  color: var(--primary);
  width: 16px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  margin-top: 50px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 底部固定条 ===== */
.fixed-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background: var(--primary-deep);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  height: 64px;
  transform: translateY(100%);
  transition: transform .35s ease;
  box-shadow: 0 -6px 20px rgba(16, 42, 67, .18);
}

.fixed-bar.show { transform: translateY(0); }

.fixed-bar-text {
  font-size: 15px;
  font-weight: 500;
}

.fixed-bar .btn {
  background: #fff;
  color: var(--primary-deep);
  padding: 9px 24px;
  font-size: 14px;
}

.fixed-bar .btn:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .process-visual {
    order: 2;
    max-width: 520px;
  }

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

  .cta-box {
    grid-template-columns: 1fr;
    padding: 40px;
  }
}

@media (max-width: 767px) {
  .section-block { padding: 56px 0; }

  .header-inner { gap: 12px; }

  .nav-cta { display: none; }

  .brand-name { font-size: 16px; }

  .main-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 20px 40px rgba(16, 42, 67, .12);
    border-bottom: 1px solid var(--line);
    display: none;
  }

  .main-nav.open { display: flex; }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 10px;
  }

  .nav-cta-mobile {
    display: inline-flex;
    margin-top: 16px;
    justify-content: center;
  }

  .nav-toggle { display: flex; }

  .page-hero { padding: 56px 0 64px; }

  .page-hero h1 { font-size: 32px; }

  .hero-lead { font-size: 16px; }

  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .section-head h2 { font-size: 26px; }
  .process-left h2 { font-size: 26px; }
  .cta-info h2 { font-size: 24px; }

  .grid-4 { grid-template-columns: 1fr; }

  .standard-table thead th,
  .standard-table tbody td {
    padding: 14px 16px;
    font-size: 14px;
  }

  .standard-table tbody td:first-child { width: auto; }

  .faq-q { padding: 16px 18px; }
  .faq-a-inner { padding: 0 18px 18px 18px; }

  .cta-box { padding: 32px 24px; }
  .cta-form { padding: 24px; }

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

  .fixed-bar { height: 54px; gap: 16px; }
  .fixed-bar-text { font-size: 14px; max-width: 55%; line-height: 1.4; }
  .fixed-bar .btn { font-size: 13px; padding: 8px 18px; }

  .timeline-item { padding-left: 52px; }
}