/* roulang page: index */
:root {
  --primary: #2463E3;
  --primary-dark: #1B46B0;
  --primary-soft: #EDF2FB;
  --accent: #FF7A3C;
  --bg: #F5F8FC;
  --card-bg: #FFFFFF;
  --text: #1B2D4A;
  --text-secondary: #61728C;
  --text-muted: #8A99B0;
  --border: #E1E8F2;
  --shadow-sm: 0 2px 8px rgba(27, 46, 90, .06);
  --shadow-lg: 0 10px 24px rgba(27, 46, 90, .10);
  --radius-card: 14px;
  --radius-hero: 20px;
  --radius-btn: 10px;
  --pill: 999px;
  --container: 1200px;
  --section-pad: 88px;
  --section-pad-tab: 64px;
  --section-pad-mobile: 48px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll {
  overflow: hidden;
}
img {
  display: block;
  max-width: 100%;
}
ul,
ol {
  list-style: none;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
textarea {
  font: inherit;
  color: inherit;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 88px 0;
}
.section-head {
  max-width: 720px;
  margin-bottom: 44px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 14px;
  border-radius: var(--pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--text);
  margin-bottom: 14px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 16px;
}
.text-accent {
  color: var(--accent);
}
.num {
  font-variant-numeric: tabular-nums;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 0 rgba(27, 46, 90, .04);
  transition: box-shadow .2s ease, background .2s ease;
}
.site-header.scrolled {
  background: #fff;
  box-shadow: 0 8px 30px rgba(27, 46, 90, .06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.brand-mark {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.02em;
  border-radius: 9px;
  box-shadow: 0 6px 14px rgba(36, 99, 227, .22);
}
.brand-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  position: relative;
  padding: 8px 13px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  text-align: center;
  transition: color .2s, background .2s;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(36, 99, 227, .06);
}
.nav-link.active,
.nav-link[aria-current="page"] {
  color: var(--primary);
  background: rgba(36, 99, 227, .10);
}
.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 0 22px;
  height: 44px;
  border-radius: var(--radius-btn);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  box-shadow: 0 8px 18px rgba(36, 99, 227, .18);
}
.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(36, 99, 227, .22);
}
.btn:active {
  transform: translateY(0);
}
.btn-pill {
  border-radius: var(--pill);
  height: 40px;
  padding: 0 22px;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: none;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(36, 99, 227, .04);
  box-shadow: none;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.menu-toggle-bar {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  display: block;
  position: relative;
  transition: transform .2s;
}
.menu-toggle-bar::before,
.menu-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .2s;
}
.menu-toggle-bar::before {
  top: -6px;
}
.menu-toggle-bar::after {
  top: 6px;
}

/* Hero */
.hero {
  position: relative;
  padding: 120px 0 64px;
  background: linear-gradient(180deg, rgba(245, 248, 252, .96) 0%, rgba(237, 243, 251, .96) 100%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
}
.hero .container {
  position: relative;
  z-index: 2;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 52px;
  align-items: center;
}
.hero-copy {
  max-width: 640px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .86);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--pill);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.hero h1 {
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  font-weight: 700;
  line-height: 1.28;
  margin-bottom: 20px;
  letter-spacing: 0;
  color: var(--text);
}
.hero h1 .text-primary {
  color: var(--primary);
}
.hero-sub {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.hero-leaf {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 18px;
}
.hero-visual-wrap {
  border-radius: var(--radius-hero);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 22px 60px rgba(36, 99, 227, .16);
}
.hero-visual {
  border-radius: var(--radius-hero);
  width: 100%;
  height: 320px;
  object-fit: cover;
}
.hero-visual-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  background: #fff;
}
.signal-text {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #2A9D6F;
  font-weight: 600;
}
.signal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3DBC84;
}
.subtle-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(36, 99, 227, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 99, 227, .03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* Metrics */
.metrics-section {
  padding: 30px 0 56px;
  position: relative;
  z-index: 3;
  background: transparent;
  margin-top: -30px;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.metric-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid rgba(225, 232, 242, .6);
  box-shadow: var(--shadow-sm);
  padding: 30px 24px;
  transition: box-shadow .2s;
}
.metric-card:hover {
  box-shadow: var(--shadow-lg);
}
.metric-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 14px;
}
.metric-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.15;
  letter-spacing: .01em;
}
.metric-label {
  margin-top: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.metric-trend {
  margin-top: 5px;
  font-size: 13px;
  color: var(--text-secondary);
}
.trend-up {
  color: #3DBC84;
}
.trend-orange {
  color: var(--accent);
}

/* Services */
.services-section {
  padding-top: 20px;
  background: #fff;
}
.services-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 48px;
  align-items: start;
}
.service-row {
  display: grid;
  grid-template-columns: 58px 42px 1fr;
  gap: 16px;
  align-items: flex-start;
  padding: 26px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  background: #fff;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.service-row + .service-row {
  border-top: 1px solid var(--border);
}
.service-row:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-left: 3px solid var(--primary);
}
.service-index {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 600;
  line-height: 1;
  padding-top: 6px;
}
.service-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.service-title {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}
.service-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 11px;
  background: #F2F6FC;
  color: var(--text-secondary);
  border-radius: var(--pill);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}
.tag-blue {
  background: var(--primary-soft);
  color: var(--primary);
}
.services-aside {
  position: sticky;
  top: 90px;
}
.side-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.side-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.side-card-body {
  padding: 24px;
}
.side-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.side-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 18px;
}
.side-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}
.side-link:hover {
  color: var(--primary-dark);
}
.side-link .arrow {
  transition: transform .2s;
}
.side-link:hover .arrow {
  transform: translateX(3px);
}

/* Compare */
.compare-section {
  background: var(--primary-soft);
}
.compare-head {
  display: grid;
  grid-template-columns: 180px 1fr 1fr;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, .7);
  border-radius: var(--radius-card);
  font-weight: 600;
  color: var(--text);
  align-items: center;
  margin-bottom: 10px;
  font-size: 14px;
}
.compare-row {
  display: grid;
  grid-template-columns: 180px 1fr 1fr;
  gap: 16px;
  align-items: center;
  background: #fff;
  padding: 18px 20px;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: 10px;
}
.compare-label {
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}
.compare-cell {
  display: flex;
  align-items: center;
  gap: 14px;
}
.compare-cell .bar-wrap {
  flex: 1;
}
.bar-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 7px;
  line-height: 1.4;
}
.bar-track {
  height: 8px;
  border-radius: var(--pill);
  background: #EFF3F9;
  overflow: hidden;
}
.bar-fill {
  height: 8px;
  border-radius: var(--pill);
}
.bar-fill.blue {
  background: var(--primary);
}
.bar-fill.orange {
  background: var(--accent);
  width: 36%;
}
.bar-fill.dark {
  background: #4E6F94;
}
.dot-on {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3DBC84;
  box-shadow: 0 0 0 3px rgba(61, 188, 132, .12);
  flex: none;
}
.dot-wait {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #B9C5D6;
  flex: none;
}
.compare-note {
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: 14px;
  background: #fff;
  border-radius: var(--radius-card);
  padding: 14px 18px;
  line-height: 1.7;
}
.compare-note strong {
  color: var(--primary);
}

/* News */
.news-section {
  background: #fff;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.news-thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.news-card:hover .news-thumb img {
  transform: scale(1.03);
}
.news-badge {
  position: absolute;
  left: 12px;
  top: 12px;
  background: rgba(255, 255, 255, .92);
  color: var(--primary);
  border-radius: var(--pill);
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
}
.news-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.news-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.news-more {
  margin-top: auto;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.empty-news {
  grid-column: 1 / -1;
  text-align: center;
  background: #FBFCFE;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  padding: 40px 24px;
  color: var(--text-secondary);
}

/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-inner {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 48px;
  align-items: start;
}
.faq-left .section-title {
  font-size: clamp(1.8rem, 2.6vw, 2.5rem);
}
.faq-list-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 8px 22px;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  transition: color .2s;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 400;
  transition: transform .25s, background .25s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  padding: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 180px;
  padding-bottom: 20px;
}
.faq-cta {
  margin-top: 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.faq-cta-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.faq-cta p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Contact CTA */
.contact-section {
  background: #0E2140;
  color: rgba(255, 255, 255, .9);
  padding: 96px 0;
}
.contact-inner {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.contact-left h2 {
  color: #fff;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1.35;
  margin-bottom: 16px;
}
.contact-left p {
  color: rgba(255, 255, 255, .72);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 28px;
}
.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.contact-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, .8);
}
.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.contact-form-card {
  background: #fff;
  border-radius: 18px;
  padding: 34px;
  box-shadow: 0 28px 60px rgba(0, 0, 0, .12);
}
.form-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.form-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  height: 46px;
  background: #FBFCFE;
  border: 1px solid #D7E0EA;
  border-radius: var(--radius-btn);
  padding: 0 14px;
  font-size: 15px;
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
textarea.form-control {
  height: auto;
  min-height: 110px;
  resize: vertical;
  padding-top: 12px;
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 99, 227, .16);
}
.form-submit {
  width: 100%;
  height: 48px;
  margin-top: 6px;
}
.form-status {
  display: none;
  font-size: 14px;
  line-height: 1.6;
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  margin-bottom: 14px;
}
.form-status.is-success {
  display: block;
  color: #1A7F4E;
  background: #E6F7ED;
}
.form-status.is-error {
  display: block;
  color: #B2333A;
  background: #FBEAEB;
}

/* Footer */
.site-footer {
  background: #0B1B31;
  color: rgba(255, 255, 255, .7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .9fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand .brand-text {
  color: #fff;
}
.footer-about {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .62);
}
.footer-title {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255, 255, 255, .7);
  font-size: 14px;
  transition: color .2s, padding-left .2s;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, .68);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 18px 0;
  font-size: 13px;
  text-align: center;
  color: rgba(255, 255, 255, .4);
}

/* Back to top */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 22px rgba(27, 46, 90, .16);
  border: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  z-index: 60;
  transition: transform .2s, box-shadow .2s;
}
.back-top.show {
  display: flex;
}
.back-top:hover {
  transform: translateY(-3px);
  color: var(--primary-dark);
  box-shadow: 0 12px 28px rgba(27, 46, 90, .2);
}

/* Responsive */
@media (max-width: 1024px) {
  .header-inner {
    position: relative;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    box-shadow: 0 20px 36px rgba(27, 46, 90, .08);
    border-top: 1px solid var(--border);
    border-radius: 0 0 16px 16px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    gap: 6px;
    transition: max-height .3s, opacity .2s, visibility .2s;
    pointer-events: none;
  }
  .site-nav.is-open {
    max-height: 560px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .nav-link {
    text-align: left;
    padding: 12px 14px;
  }
  .header-cta {
    width: 100%;
    margin-top: 8px;
  }
  .header-cta .btn {
    width: 100%;
  }
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero {
    padding-top: 110px;
  }
  .hero-visual-wrap {
    max-width: 640px;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .services-inner {
    grid-template-columns: 1fr;
  }
  .services-aside {
    position: static;
  }
  .compare-head,
  .compare-row {
    grid-template-columns: 140px 1fr 1fr;
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .faq-inner {
    grid-template-columns: 1fr;
  }
  .faq-left {
    margin-bottom: 10px;
  }
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  .section {
    padding: 48px 0;
  }
  .section-title {
    font-size: 28px;
  }
  .hero {
    padding-top: 104px;
    padding-bottom: 26px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-visual {
    height: 220px;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .metrics-section {
    padding-top: 44px;
  }
  .service-row {
    grid-template-columns: 36px 36px 1fr;
    padding: 20px 14px;
    gap: 12px;
  }
  .service-row:hover {
    border-left-width: 3px;
  }
  .compare-head {
    display: none;
  }
  .compare-row {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .compare-label {
    font-size: 15px;
  }
  .compare-cell {
    align-items: flex-start;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .news-thumb {
    aspect-ratio: 16 / 8;
  }
  .faq-question {
    font-size: 15px;
    line-height: 1.6;
  }
  .faq-item.open .faq-answer {
    max-height: 300px;
  }
  .contact-section {
    padding: 64px 0;
  }
  .contact-form-card {
    padding: 24px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 20px;
  }
  .site-footer {
    padding-top: 48px;
  }
}
@media (max-width: 520px) {
  .brand-text {
    font-size: 15px;
  }
  .brand-mark {
    width: 32px;
    height: 32px;
  }
  .btn {
    padding: 0 18px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .service-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .service-meta {
    margin-top: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}

/* roulang page: category1 */
:root{
  --primary:#2463E3;
  --primary-dark:#1B46B0;
  --primary-soft:#EDF2FB;
  --accent:#FF7A3C;
  --accent-soft:#FFF1E9;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --text:#1B2D4A;
  --muted:#61728C;
  --light:#8A99B0;
  --border:#E1E8F2;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 2px 8px rgba(27,46,90,.06);
  --shadow-hover:0 10px 24px rgba(27,46,90,.10);
  --container:1200px;
  --header-h:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,ul{margin:0;}
ul{list-style:none;padding:0;}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
button,input,textarea{font-family:inherit;}
.container{
  width:min(var(--container),calc(100% - 40px));
  margin-inline:auto;
}
.page-section{padding:88px 0;}
.band{background:#EDF2FB;}

/* ===== Header ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:var(--header-h);
  background:#FFFFFF;
  z-index:1000;
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.scrolled{
  border-bottom-color:var(--border);
  box-shadow:0 6px 20px rgba(27,46,90,.06);
}
.header-inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  position:relative;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:800;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  letter-spacing:.02em;
}
.brand-text{
  font-size:20px;
  font-weight:800;
  color:var(--text);
  line-height:1.2;
  letter-spacing:0;
}
.site-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:8px;
  font-size:15px;
  color:var(--muted);
  line-height:1.4;
  transition:background .2s,color .2s;
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft);}
.nav-link.active{
  color:var(--primary);
  background:var(--primary-soft);
  font-weight:600;
}
.header-cta{
  display:inline-flex;
  align-items:center;
  margin-left:12px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:none;
  cursor:pointer;
  font-size:15px;
  font-weight:600;
  border-radius:10px;
  padding:10px 20px;
  line-height:1.4;
  background:transparent;
  transition:background .2s,color .2s,transform .2s,box-shadow .2s;
  text-align:center;
}
.btn-pill{border-radius:999px;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 8px 18px rgba(36,99,227,.18);}
.btn-outline{border:1px solid var(--border);color:var(--primary);background:#fff;}
.btn-outline:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-1px);}
.btn-light-outline{background:transparent;border:1px solid rgba(255,255,255,.7);color:#fff;}
.btn-light-outline:hover{background:rgba(255,255,255,.14);color:#fff;}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--border);
  border-radius:10px;
  background:#fff;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  cursor:pointer;
}
.nav-toggle .bar{
  width:18px;height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .2s,opacity .2s;
}

/* ===== Page Hero ===== */
.page-hero{
  padding:calc(var(--header-h) + 64px) 0 72px;
  background:
    radial-gradient(circle at 82% 18%,rgba(36,99,227,.10),transparent 26%),
    var(--bg);
  border-bottom:1px solid var(--border);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:52px;
  align-items:center;
}
.hero-kicker{
  display:inline-flex;
  padding:6px 14px;
  border-radius:999px;
  background:var(--accent-soft);
  color:var(--accent);
  font-size:14px;
  font-weight:600;
  margin-bottom:20px;
}
.hero-copy h1{
  font-size:clamp(2.25rem,3.4vw,3.1rem);
  line-height:1.2;
  margin-bottom:20px;
  color:var(--text);
  letter-spacing:0;
}
.hero-lead{
  font-size:17px;
  color:var(--muted);
  max-width:540px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.hero-points{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px 16px;
  max-width:560px;
}
.hero-points li{
  position:relative;
  padding-left:30px;
  font-size:14px;
  color:var(--muted);
}
.hero-points li::before{
  content:"";
  position:absolute;
  left:2px;top:6px;
  width:7px;height:14px;
  border:solid var(--primary);
  border-width:0 2px 2px 0;
  transform:rotate(45deg);
}
.hero-figure{
  position:relative;
}
.hero-figure img{
  width:100%;
  height:auto;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hover);
}
.hero-figure::after{
  content:"";
  position:absolute;
  right:-16px;bottom:-18px;
  width:90px;height:90px;
  background:
    radial-gradient(circle at 20% 20%,var(--accent),transparent 45%),
    var(--primary);
  border-radius:18px;
  opacity:.16;
  z-index:-1;
}

/* ===== Split ===== */
.split-grid{
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:48px;
  align-items:center;
}
.overline{
  color:var(--primary);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(1.7rem,2.4vw,2rem);
  line-height:1.35;
  margin-bottom:18px;
}
.section-head p{
  color:var(--muted);
  font-size:15px;
}
.split-copy p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:22px;
}
.feature-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
  margin-top:22px;
}
.feature-list li{
  display:flex;
  align-items:center;
  gap:10px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px 14px;
  font-size:15px;
  color:var(--text);
  font-weight:500;
  box-shadow:var(--shadow);
}
.feature-list li::before{
  content:"";
  width:8px;height:8px;
  border-radius:50%;
  background:var(--primary);
  flex-shrink:0;
}
.split-media img{
  width:100%;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hover);
}

/* ===== Service Matrix ===== */
.service-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.service-card{
  position:relative;
  display:flex;
  gap:20px;
  background:var(--card);
  border:1px solid var(--border);
  border-left:3px solid transparent;
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.service-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-left-color:var(--primary);
}
.service-num{
  flex-shrink:0;
  font-size:15px;
  color:var(--light);
  font-weight:700;
  line-height:1;
  letter-spacing:.01em;
  font-family:"DIN Alternate","Bahnschrift",sans-serif;
  padding-top:2px;
}
.service-body h3{
  font-size:20px;
  margin-bottom:10px;
  color:var(--text);
}
.service-body p{
  color:var(--muted);
  font-size:14.5px;
  margin-bottom:16px;
}
.tag-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.tag{
  display:inline-flex;
  padding:4px 12px;
  font-size:12.5px;
  font-weight:500;
  color:var(--primary);
  background:var(--primary-soft);
  border-radius:999px;
}
.service-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  margin-top:12px;
}
.service-link::after{
  content:"→";
  transition:transform .2s;
}
.service-link:hover::after{transform:translateX(4px);}

/* ===== Metrics ===== */
.metrics-wrap{
  background:#fff;
  border:1px solid var(--border);
  border-radius:20px;
  box-shadow:var(--shadow);
  padding:36px 32px;
}
.metric-head{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  margin-bottom:26px;
}
.metric-head h2{
  font-size:22px;
}
.metric-note{
  color:var(--light);
  font-size:14px;
}
.metric-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.metric-item{
  border-left:1px solid var(--border);
  padding-left:24px;
}
.metric-item:first-child{border-left:none;padding-left:0;}
.metric-label{
  font-size:14px;
  color:var(--muted);
  margin-bottom:10px;
}
.metric-value{
  font-family:"DIN Alternate","Bahnschrift",sans-serif;
  font-size:44px;
  line-height:1;
  color:var(--primary-dark);
  letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
  font-weight:700;
}
.metric-value span{font-size:18px;color:var(--light);margin-left:4px;font-weight:600;}
.metric-desc{
  margin-top:10px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--light);
}
.metric-desc::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
}

/* ===== Process ===== */
.process-sub{
  max-width:660px;
  color:var(--muted);
  font-size:15px;
  margin-top:10px;
}
.step-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:16px;
  margin-top:40px;
  counter-reset:step;
}
.step-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:24px 20px;
  transition:transform .25s,box-shadow .25s;
}
.step-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
}
.step-num{
  display:block;
  font-family:"DIN Alternate","Bahnschrift",sans-serif;
  font-size:15px;
  color:var(--primary);
  font-weight:700;
  margin-bottom:14px;
}
.step-card h3{
  font-size:16px;
  margin-bottom:8px;
}
.step-card p{
  font-size:13.5px;
  color:var(--muted);
  line-height:1.7;
}

/* ===== Compare ===== */
.compare-panel{
  background:#fff;
  border:1px solid var(--border);
  border-radius:20px;
  box-shadow:var(--shadow);
  padding:32px;
}
.compare-intro{
  display:grid;
  grid-template-columns:130px 1fr 1fr;
  gap:14px;
  padding-bottom:22px;
}
.compare-intro-holder{color:var(--light);font-size:13px;}
.compare-mode-title{
  font-weight:700;
  background:#fff;
}
.compare-mode-title.modern{color:var(--primary);}
.compare-body-rows{border-top:1px solid var(--border);}
.compare-row{
  display:grid;
  grid-template-columns:130px 1fr 1fr;
  gap:14px;
  border-bottom:1px solid var(--border);
  padding:22px 0;
  align-items:center;
}
.compare-row:last-child{border-bottom:none;padding-bottom:0;}
.compare-row-label{
  font-size:14px;
  font-weight:600;
  color:var(--text);
}
.compare-mode-title,.compare-state{
  font-size:13.5px;
  color:var(--muted);
  margin-bottom:8px;
  display:flex;
  align-items:center;
  gap:8px;
}
.compare-mode-title.modern,.compare-state.modern{color:var(--primary);font-weight:600;}
.compare-dot{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--accent);
  flex-shrink:0;
}
.compare-dot.modern{background:var(--primary);}
.bar-track{
  height:8px;
  border-radius:999px;
  background:#EEF2F8;
  overflow:hidden;
  margin-top:6px;
}
.bar-fill{
  display:block;
  height:100%;
  border-radius:999px;
  background:var(--accent);
}
.bar-fill.high{background:var(--primary);}

/* ===== FAQ ===== */
.faq-layout{
  display:grid;
  grid-template-columns:.85fr 2.15fr;
  gap:48px;
}
.faq-side .section-head{
  max-width:none;
  margin-bottom:20px;
}
.faq-side h2{font-size:clamp(1.7rem,2.2vw,2rem);margin-bottom:16px;}
.faq-side p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:28px;
}
.faq-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
}
.faq-accordion{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.faq-item{
  border-bottom:1px solid var(--border);
}
.faq-item:last-child{border-bottom:none;}
.faq-question{
  width:100%;
  background:none;
  border:none;
  text-align:left;
  padding:22px 26px;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  transition:color .2s;
}
.faq-question:hover{color:var(--primary);}
.faq-icon{
  flex-shrink:0;
  width:26px;height:26px;
  border-radius:50%;
  background:var(--primary-soft);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  transition:transform .25s,background .2s;
}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-answer{
  max-height:0;
  overflow:hidden;
  padding:0 26px;
  transition:max-height .3s ease,padding .3s ease;
}
.faq-item.open .faq-answer{
  max-height:220px;
  padding:0 26px 22px;
}
.faq-answer p{
  font-size:15px;
  color:var(--muted);
  border-top:1px solid var(--border);
  padding-top:16px;
}

/* ===== CTA ===== */
.cta-card{
  position:relative;
  border-radius:20px;
  background:
    linear-gradient(100deg,rgba(14,33,64,.96),rgba(27,46,90,.82)),
    url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
  padding:56px 56px;
  color:#fff;
  overflow:hidden;
}
.cta-card h2{
  font-size:clamp(1.7rem,2.4vw,2.2rem);
  margin-bottom:14px;
  line-height:1.35;
}
.cta-card p{
  color:rgba(255,255,255,.85);
  max-width:620px;
  font-size:16px;
  margin-bottom:28px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ===== Footer ===== */
.site-footer{
  background:#0E2140;
  color:#C7D4E8;
  margin-top:88px;
}
.site-footer .container{
  max-width:var(--container);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding:60px 0 46px;
}
.footer-brand .brand{
  color:#fff;
  margin-bottom:18px;
}
.footer-brand .brand-mark{
  background:#fff;
  color:#0E2140;
}
.footer-brand .brand-text{
  color:#fff;
}
.footer-about{
  font-size:14px;
  line-height:1.9;
  color:#A7B9D2;
  max-width:320px;
}
.site-footer h4.footer-title{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:22px;
}
.footer-links li,.footer-contact li{
  margin-bottom:12px;
  font-size:14px;
}
.footer-links a{
  color:#A7B9D2;
  transition:color .2s;
}
.footer-links a:hover{color:#fff;}
.footer-contact{
  color:#A7B9D2;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;
  font-size:14px;
  color:#8FA5BD;
  text-align:center;
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .page-section{padding:64px 0;}
  .brand-text{font-size:18px;}
  .site-nav{
    display:none;
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    width:100%;
    background:#fff;
    box-shadow:0 18px 30px rgba(27,46,90,.12);
    border-bottom:1px solid var(--border);
    padding:18px 20px 26px;
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
  }
  .site-nav.open{display:flex;}
  .site-nav .nav-link{
    width:100%;
    padding:12px 16px;
    font-size:16px;
  }
  .site-nav .header-cta{
    width:100%;
    margin:12px 0 0;
    display:block;
  }
  .site-nav .header-cta .btn{
    width:100%;
  }
  .nav-toggle{display:inline-flex;}
  .hero-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
  .hero-points{grid-template-columns:1fr;}
  .split-grid{grid-template-columns:1fr;gap:36px;}
  .split-copy p{max-width:680px;}
  .service-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:30px;}
  .metric-item:nth-child(3){border-left:none;padding-left:0;}
  .metric-item{border-left:none;padding-left:0;}
  .step-grid{
    grid-template-columns:repeat(3,1fr);
    gap:16px;
  }
  .compare-intro,.compare-row{grid-template-columns:110px 1fr 1fr;}
  .faq-layout{grid-template-columns:1fr;gap:36px;}
}

@media (max-width:768px){
  .page-section{padding:48px 0;}
  .container{width:min(100% - 40px,1200px);}
  .hero-grid{grid-template-columns:1fr;}
  .page-hero{padding:calc(var(--header-h) + 32px) 0 52px;}
  .hero-copy h1{font-size:2.2rem;}
  .hero-points{grid-template-columns:repeat(2,1fr);}
  .hero-figure::after{display:none;}
  .feature-list,.split-copy .feature-list{grid-template-columns:1fr;}
  .service-card{flex-direction:row;}
  .metrics-wrap{padding:24px 20px;}
  .metric-grid{grid-template-columns:1fr 1fr;gap:22px;}
  .metric-value{font-size:36px;}
  .step-grid{grid-template-columns:1fr 1fr;}
  .compare-panel{padding:22px 18px;overflow-x:auto;}
  .compare-intro,.compare-row{min-width:620px;}
  .cta-card{padding:40px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-bottom{padding:18px 20px;}
}

@media (max-width:520px){
  .container{width:min(100% - 32px,1200px);}
  .brand-mark{width:34px;height:34px;}
  .brand-text{
    font-size:16px;
  }
  .header-inner{gap:8px;}
  .hero-copy h1{font-size:1.8rem;}
  .hero-lead{font-size:15px;}
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
    width:100%;
  }
  .btn{width:100%;}
  .hero-points{grid-template-columns:1fr;}
  .section-head{margin-bottom:32px;}
  .service-card{
    padding:22px;
    gap:14px;
    flex-direction:column;
  }
  .metric-grid{grid-template-columns:1fr 1fr;}
  .metric-value{font-size:30px;}
  .metric-label{font-size:12px;}
  .step-grid{grid-template-columns:1fr;}
  .faq-question{padding:18px 20px;font-size:15px;}
  .faq-answer{padding:0 20px;}
  .faq-item.open .faq-answer{padding:0 20px 18px;}
  .cta-card{padding:32px 22px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 30px;}
}

/* roulang page: article */
:root{
  --primary:#2463E3;
  --primary-dark:#1B46B0;
  --accent:#FF7A3C;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --band:#EDF2FB;
  --text:#1B2D4A;
  --text-secondary:#61728C;
  --text-weak:#8A99B0;
  --border:#E1E8F2;
  --input-border:#D7E0EA;
  --radius-card:14px;
  --radius-hero:20px;
  --radius-btn:10px;
  --shadow-card:0 2px 8px rgba(27,46,90,.06);
  --shadow-hover:0 10px 24px rgba(27,46,90,.10);
  --header-height:64px;
  --transition:.25s ease;
  --container:1200px;
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.75;
  display:flex;
  flex-direction:column;
  min-height:100vh;
}
main{flex:1}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition),background var(--transition),box-shadow var(--transition),transform var(--transition)}
a:hover{color:var(--primary-dark)}
button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol,figure,p,h1,h2,h3,h4,h5,blockquote,table{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:3px solid rgba(36,99,227,.22);outline-offset:2px;box-shadow:0 0 0 4px rgba(36,99,227,.10)}
::selection{background:rgba(36,99,227,.16);color:var(--text)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.section{padding:88px 0}
.section-title{
  font-size:clamp(1.5rem,2.4vw,1.875rem);
  line-height:1.35;
  margin-bottom:10px;
  color:var(--text);
  letter-spacing:0;
}
.section-desc{color:var(--text-secondary);max-width:680px;margin-bottom:32px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  min-height:46px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  line-height:1.2;
  transition:background var(--transition),color var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 8px 18px rgba(27,70,176,.22)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-pill{border-radius:999px;padding:10px 22px;min-height:42px;background:var(--primary);color:#fff}
.btn-pill:hover{background:var(--primary-dark);color:#fff}
.btn-block{width:100%}
.btn-ghost{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.32)}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:var(--header-height);
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(160%);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--transition),border-color var(--transition);
}
.site-header.is-scrolled{
  border-bottom-color:var(--border);
  box-shadow:0 6px 18px rgba(27,46,90,.05);
}
.header-inner{
  height:var(--header-height);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;
  border-radius:12px;
  background:var(--primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:16px;
  letter-spacing:.02em;
  box-shadow:0 6px 14px rgba(36,99,227,.22);
}
.brand-text{
  font-size:1.15rem;
  font-weight:700;
  color:var(--text);
  letter-spacing:.01em;
}
.site-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 14px;
  border-radius:10px;
  color:var(--text-secondary);
  font-size:15px;
  font-weight:500;
  transition:background var(--transition),color var(--transition);
}
.nav-link span{line-height:1.2}
.nav-link:hover{color:var(--primary);background:#EBF1FE}
.nav-link.active{color:var(--primary);background:#EBF1FE;font-weight:600}
.header-cta{margin-left:12px;display:inline-flex;align-items:center}
.header-cta .btn-pill{box-shadow:0 8px 16px rgba(36,99,227,.18)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  background:transparent;
  transition:background var(--transition);
}
.nav-toggle:hover{background:#EDF2FB}
.nav-toggle span{
  display:block;
  width:20px;height:2px;
  background:var(--text);
  border-radius:3px;
  transition:transform var(--transition),opacity var(--transition),background var(--transition);
}
.site-header.is-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.site-header.is-open .nav-toggle span:nth-child(2){opacity:0}
.site-header.is-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.article-head{
  padding-top:calc(var(--header-height) + 68px);
  padding-bottom:48px;
  background:
    linear-gradient(180deg,rgba(245,248,252,.94),rgba(237,242,251,.95)),
    url('/assets/images/backpic/back-1.webp') center 35% / cover no-repeat;
  border-bottom:1px solid var(--border);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-weak);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb-sep{color:#C3CEE0;user-select:none}
.breadcrumb .current{color:var(--text);font-weight:500}
.article-header-content{max-width:980px}
.article-title{
  font-size:clamp(1.875rem,3vw,2.5rem);
  line-height:1.4;
  color:var(--text);
  letter-spacing:0;
  margin:18px 0 16px;
  text-balance:balance;
  overflow-wrap:break-word;
}
.article-lead{color:var(--text-secondary);font-size:16px;max-width:860px}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid rgba(225,232,242,.90);
  color:var(--text-secondary);
  font-size:14px;
}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item svg{width:16px;height:16px;stroke:var(--text-weak);flex-shrink:0}
.meta-sep{width:4px;height:4px;border-radius:50%;background:#CDD6E5}
.meta-strong{color:var(--text)}

.post-section{padding:56px 0 32px}
.post-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 280px;
  gap:32px;
  align-items:start;
}
.post-main{
  min-width:0;
  max-width:860px;
}
.post-content-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-hero);
  box-shadow:var(--shadow-card);
  padding:42px;
}
.article-content{font-size:16px;line-height:1.9;color:#243858}
.article-content p{margin:0 0 1.5em}
.article-content a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(36,99,227,.35)}
.article-content a:hover{text-decoration-color:var(--primary)}
.article-content h2{
  font-size:1.65rem;
  line-height:1.5;
  color:var(--text);
  margin:2.2em 0 .8em;
  padding-bottom:.55em;
  border-bottom:1px solid var(--border);
}
.article-content h3{
  font-size:1.25rem;
  line-height:1.55;
  color:var(--text);
  margin:1.8em 0 .7em;
}
.article-content h4{
  font-size:1.05rem;
  color:var(--text);
  margin:1.6em 0 .6em;
}
.article-content ul,.article-content ol{
  margin:0 0 1.6em;
  padding-left:1.4em;
}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin:.45em 0}
.article-content blockquote{
  margin:1.8em 0;
  padding:16px 22px;
  background:var(--bg);
  border-left:4px solid var(--primary);
  border-radius:0 12px 12px 0;
  color:var(--text-secondary);
}
.article-content img{
  max-width:100%;
  height:auto;
  border-radius:14px;
  margin:1.8em 0;
  box-shadow:var(--shadow-card);
}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:1.8em 0;
  font-size:15px;
  background:#fff;
  border-radius:12px;
  overflow:hidden;
}
.article-content th{
  background:#EDF2FB;
  color:var(--text);
  font-weight:600;
  text-align:left;
  padding:12px 14px;
  border:1px solid var(--border);
}
.article-content td{
  padding:12px 14px;
  border:1px solid var(--border);
  color:var(--text-secondary);
  vertical-align:top;
}
.article-content code{
  background:#EDF2FB;
  border:1px solid var(--border);
  border-radius:6px;
  padding:2px 7px;
  font-size:.9em;
  color:var(--primary-dark);
}
.article-content hr{
  border:0;
  height:1px;
  background:var(--border);
  margin:2.4em 0;
}
.article-note{
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:14px;
  padding:18px 20px;
  color:var(--text-secondary);
  margin:1.8em 0;
  display:flex;
  gap:12px;
  align-items:flex-start;
}
.article-note strong{color:var(--text)}

.article-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  border-top:1px solid var(--border);
  margin-top:34px;
  padding-top:24px;
}
.article-tags-label{
  font-size:13px;
  color:var(--text-weak);
  font-weight:600;
  margin-right:2px;
}
.tag-chip{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  background:#EDF2FB;
  color:var(--primary-dark);
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  line-height:1.2;
}
.post-pager{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  border-top:1px solid var(--border);
  padding:26px 0 0;
  margin-top:30px;
}
.pager-muted{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--text-weak);
  font-size:14px;
  background:#F5F8FC;
  border:1px dashed var(--border);
  border-radius:10px;
  padding:10px 16px;
  line-height:1.2;
}
.pager-center{font-weight:600}

.post-aside{
  position:sticky;
  top:calc(var(--header-height) + 28px);
  display:grid;
  gap:18px;
}
.side-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:22px;
}
.side-card-title{
  font-size:1rem;
  color:var(--text);
  font-weight:700;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card-title em{
  font-style:normal;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 4px rgba(36,99,227,.10);
  display:inline-block;
}
.side-toc{display:grid;gap:2px}
.toc-link{
  display:block;
  padding:9px 12px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.5;
  border-left:2px solid transparent;
}
.toc-link:hover{color:var(--primary);background:#EDF2FB;border-left-color:var(--primary)}
.toc-link.toc-sub{padding-left:26px;font-size:13px}
.toc-empty{color:var(--text-weak);font-size:14px;padding:6px 2px}
.side-list{display:grid;gap:10px}
.side-mini-card{
  display:flex;
  gap:12px;
  align-items:center;
  background:#FBFCFE;
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px;
  color:var(--text);
  transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition);
}
.side-mini-card:hover{
  border-color:rgba(36,99,227,.35);
  box-shadow:var(--shadow-card);
  transform:translateY(-2px);
  color:var(--primary-dark);
}
.side-mini-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:#EDF2FB;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  font-weight:700;
  flex-shrink:0;
}
.side-mini-copy{display:grid;gap:3px;min-width:0}
.side-mini-copy strong{font-size:14px;color:var(--text)}
.side-mini-copy small{font-size:12px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-callout{
  background:linear-gradient(145deg,#F7FAFF,#EDF2FB);
  border:1px solid var(--border);
}
.side-callout .side-callout-title{font-size:15px;color:var(--text);margin-bottom:8px}
.side-callout p{font-size:13px;color:var(--text-secondary);margin-bottom:16px;line-height:1.7}
.side-callout .btn{width:100%}

.link-section{padding:56px 0 88px}
.link-section .section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:28px;
}
.link-section .section-head .section-desc{margin-bottom:0}
.link-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.link-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:18px;
  overflow:hidden;
  color:var(--text);
  box-shadow:var(--shadow-card);
  transition:box-shadow var(--transition),transform var(--transition),border-color var(--transition);
}
.link-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-hover);
  border-color:transparent;
  color:var(--text);
}
.link-card-img{position:relative;overflow:hidden;aspect-ratio:16/8;background:#EDF2FB}
.link-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.link-card:hover .link-card-img img{transform:scale(1.04)}
.link-card-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 50%,rgba(15,33,64,.18));
  pointer-events:none;
}
.link-card-badge{
  position:absolute;
  top:14px;left:14px;
  background:rgba(255,255,255,.92);
  color:var(--primary-dark);
  font-size:12px;
  font-weight:600;
  padding:6px 12px;
  border-radius:999px;
  box-shadow:0 4px 10px rgba(27,46,90,.10);
  z-index:1;
}
.link-card-body{display:flex;flex-direction:column;gap:8px;padding:20px 20px 22px;flex:1}
.link-card-body h3{font-size:1.1rem;color:var(--text);line-height:1.45}
.link-card-body h3 a{color:inherit}
.link-card-body h3 a:hover{color:var(--primary)}
.link-card-body p{color:var(--text-secondary);font-size:14px;line-height:1.75;flex:1}
.link-card-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  margin-top:12px;
}
.link-card-more::after{content:"→";transition:transform var(--transition)}
.link-card:hover .link-card-more::after{transform:translateX(4px)}

.not-found-wrap{padding:56px 0 96px}
.not-found-card{
  max-width:680px;
  margin:0 auto;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-hero);
  box-shadow:var(--shadow-card);
  padding:52px 40px;
  text-align:center;
}
.not-found-code{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:72px;height:72px;
  border-radius:20px;
  background:#EDF2FB;
  color:var(--primary);
  font-size:34px;
  font-weight:800;
  margin-bottom:18px;
}
.not-found-card h2{font-size:1.4rem;color:var(--text);margin-bottom:10px}
.not-found-card p{color:var(--text-secondary);margin-bottom:24px}
.not-found-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

.site-footer{
  background:#0E2140;
  color:#9FB2CC;
  margin-top:auto;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.25fr;
  gap:48px;
  padding:64px 0 44px;
}
.footer-brand .brand-text{color:#fff}
.footer-about{margin-top:18px;font-size:14px;line-height:1.85;color:#9FB2CC;max-width:380px}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px}
.footer-links{display:grid;gap:10px;font-size:14px}
.footer-links a{color:#9FB2CC}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-contact{display:grid;gap:10px;font-size:14px;color:#9FB2CC;line-height:1.8}
.footer-contact strong{color:#fff;display:block;font-weight:600}
.footer-contact li{display:flex;align-items:flex-start;gap:8px}
.footer-contact li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);margin-top:9px;flex-shrink:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);padding:20px 0;font-size:13px;color:#7C92B0}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}

.back-top{
  position:fixed;
  right:26px;
  bottom:26px;
  z-index:90;
  width:44px;height:44px;
  border-radius:50%;
  background:var(--card);
  color:var(--primary);
  border:1px solid var(--border);
  box-shadow:0 8px 20px rgba(27,46,90,.12);
  font-size:22px;
  line-height:1;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transform:translateY(14px);
  transition:opacity var(--transition),transform var(--transition),background var(--transition),color var(--transition),box-shadow var(--transition);
}
.back-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

@media (max-width:1024px){
  .section{padding:64px 0}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:var(--header-height);
    left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    background:var(--card);
    padding:14px 24px 22px;
    border-bottom:1px solid var(--border);
    box-shadow:0 24px 40px rgba(27,46,90,.08);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
    margin-left:0;
  }
  .site-header.is-open .site-nav{opacity:1;visibility:visible;transform:none}
  .site-nav .nav-link{
    justify-content:flex-start;
    padding:13px 16px;
    font-size:16px;
    border-radius:12px;
  }
  .site-nav .nav-link.active{background:#EDF2FB}
  .header-cta{
    margin:14px 0 0;
    padding:0;
    display:block;
  }
  .header-cta .btn{
    width:100%;
    min-height:46px;
  }
  .post-layout{grid-template-columns:1fr}
  .post-aside{display:none}
  .post-content-card{padding:32px}
  .link-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}

@media (max-width:767px){
  .section{padding:48px 0}
  .container{padding-left:20px;padding-right:20px}
  .article-head{padding-top:calc(var(--header-height) + 42px);padding-bottom:34px}
  .article-title{font-size:1.7rem;line-height:1.45}
  .article-lead{font-size:15px}
  .article-meta{gap:8px 14px;font-size:13px}
  .post-section{padding:32px 0 24px}
  .post-content-card{padding:22px 18px;border-radius:16px}
  .article-content{font-size:15px}
  .article-content h2{font-size:1.4rem}
  .article-content h3{font-size:1.15rem}
  .post-pager{justify-content:center}
  .pager-muted{width:100%;justify-content:center;order:1}
  .post-pager .btn{order:2;width:100%}
  .link-section{padding:40px 0 56px}
  .link-grid{grid-template-columns:1fr;gap:16px}
  .link-section .section-head{flex-direction:column;align-items:flex-start;gap:6px}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 28px;gap:28px}
  .footer-bottom .container{flex-direction:column;text-align:center}
  .back-top{right:16px;bottom:16px;width:40px;height:40px}
}

@media (max-width:520px){
  .article-meta{display:grid;grid-template-columns:1fr}
  .meta-sep{display:none}
  .article-header-content{max-width:100%}
  .article-lead{font-size:14px}
  .side-toc{display:none}
  .not-found-card{padding:34px 20px}
  .not-found-actions{flex-direction:column}
  .not-found-actions .btn{width:100%}
}

/* roulang page: category2 */
:root {
            --primary: #2463E3;
            --primary-deep: #1B46B0;
            --orange: #FF7A3C;
            --bg-light: #F5F8FC;
            --bg-band: #EDF2FB;
            --card-bg: #FFFFFF;
            --text-primary: #1B2D4A;
            --text-secondary: #61728C;
            --text-weak: #8A99B0;
            --border-color: #E1E8F2;
            --radius-card: 14px;
            --radius-hero: 20px;
            --radius-btn: 10px;
            --shadow-card: 0 2px 8px rgba(27, 46, 90, .06);
            --shadow-card-hover: 0 10px 24px rgba(27, 46, 90, .10);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
            --container-width: 1200px;
            --space-section: 88px;
            --space-section-md: 64px;
            --space-section-sm: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
        }
        img,
        svg {
            display: block;
            max-width: 100%;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background: #FFFFFF;
            z-index: 1000;
            border-bottom: 1px solid transparent;
            transition: box-shadow .25s ease, border-color .25s ease;
        }
        .site-header.scrolled {
            border-bottom-color: var(--border-color);
            box-shadow: 0 6px 20px rgba(27, 46, 90, .06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1;
        }
        .brand-text {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-nav .nav-link {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.4;
            transition: background-color .2s ease, color .2s ease;
        }
        .site-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(36, 99, 227, .06);
        }
        .site-nav .nav-link.active {
            color: var(--primary);
            background: rgba(36, 99, 227, .08);
            font-weight: 600;
        }
        .site-nav .header-cta {
            margin-left: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            padding: 0 22px;
            height: 46px;
            border-radius: var(--radius-btn);
            transition: background-color .2s ease, transform .2s ease, box-shadow .2s ease, color .2s ease;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-deep);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(36, 99, 227, .18);
        }
        .btn-pill {
            border-radius: 999px;
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(36, 99, 227, .06);
            border-color: var(--primary-deep);
            color: var(--primary-deep);
        }
        .btn-block {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            background: #fff;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }
        .nav-toggle svg {
            width: 20px;
            height: 20px;
            stroke: var(--text-primary);
        }

        .page-banner {
            background: #F5F8FC;
            padding-top: 144px;
            padding-bottom: 56px;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }
        .page-banner-inner {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 40px;
            flex-wrap: wrap;
        }
        .page-banner-left {
            max-width: 720px;
        }
        .crumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .crumb a {
            color: var(--text-secondary);
        }
        .crumb a:hover {
            color: var(--primary);
        }
        .crumb-sep {
            color: #CDD5E0;
            margin: 0 4px;
        }
        .page-h1 {
            font-size: clamp(2.25rem, 3.5vw, 3rem);
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .page-h1-highlight {
            color: var(--primary);
        }
        .page-lead {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 680px;
        }
        .page-banner-art {
            flex-shrink: 0;
            background: linear-gradient(135deg, #E9F0FB, #D9E4F5);
            border-radius: var(--radius-hero);
            overflow: hidden;
            width: 280px;
            height: 160px;
            position: relative;
        }
        .page-banner-art img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .75;
        }

        .section {
            padding-top: var(--space-section);
            padding-bottom: var(--space-section);
        }
        .section-band {
            background: var(--bg-band);
        }
        .section-header {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-block;
            background: rgba(36, 99, 227, .08);
            color: var(--primary);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: .01em;
        }
        .section-title {
            font-size: clamp(1.75rem, 2.4vw, 2.15rem);
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .compare-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }
        .compare-col {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }
        .compare-col-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .compare-col-title .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .dot-gray {
            background: #C6CDD9;
        }
        .dot-orange {
            background: var(--orange);
        }
        .dot-primary {
            background: var(--primary);
        }
        .compare-sub {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 28px;
        }
        .compare-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .compare-item {
            border-bottom: 1px solid #F0F3F8;
            padding-bottom: 16px;
        }
        .compare-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .compare-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .compare-label .val {
            font-weight: 600;
            font-size: 13px;
        }
        .bar-bg {
            background: #F0F3F8;
            height: 8px;
            border-radius: 999px;
            overflow: hidden;
            width: 100%;
        }
        .bar-fill {
            height: 100%;
            border-radius: 999px;
            background: var(--primary);
            transition: width .4s ease;
        }
        .bar-fill-orange {
            background: var(--orange);
        }
        .compare-note {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 18px;
            background: #F8FAFD;
            border-radius: 10px;
            padding: 12px 16px;
            line-height: 1.6;
        }

        .solution-feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-top: 32px;
        }
        .solution-feature-row+.solution-feature-row {
            margin-top: 72px;
        }
        .feature-media {
            border-radius: var(--radius-hero);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: #E9F0FB;
            aspect-ratio: 4 / 3;
        }
        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-content .section-tag {
            margin-bottom: 12px;
        }
        .feature-content h2 {
            font-size: 28px;
            line-height: 1.35;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .feature-content p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .feature-points {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 12px;
        }
        .badge {
            display: inline-block;
            background: rgba(36, 99, 227, .08);
            color: var(--primary);
            border-radius: 999px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
        }
        .badge-orange {
            background: rgba(255, 122, 60, .10);
            color: var(--orange);
        }

        .stage-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .stage-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 28px;
            position: relative;
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
        }
        .stage-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: #D2DCEA;
        }
        .stage-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .stage-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .stage-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 24px;
        }
        .case-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s ease, transform .25s ease;
            display: flex;
            height: 100%;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .case-card-media {
            width: 160px;
            flex-shrink: 0;
            background: #E9F0FB;
            overflow: hidden;
        }
        .case-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-card-body {
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }
        .case-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .case-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .case-card-meta {
            font-size: 13px;
            color: var(--text-weak);
        }

        .faq-wrap {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 32px;
            align-items: start;
        }
        .faq-guide {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 24px;
            position: sticky;
            top: 88px;
            box-shadow: var(--shadow-card);
        }
        .faq-guide h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .faq-guide-list li {
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-secondary);
            border-bottom: 1px dashed #EDF0F5;
        }
        .faq-guide-list li:last-child {
            border-bottom: none;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow .2s ease;
        }
        .faq-item.active {
            box-shadow: 0 6px 20px rgba(27, 46, 90, .07);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            line-height: 1.5;
            transition: color .2s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: #F0F3F8;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform .25s ease, background-color .25s ease, color .25s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .faq-answer-inner {
            border-top: 1px solid #F0F3F8;
            margin: 0 22px;
            padding: 16px 0 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .cta-card {
            background: #0E2140;
            border-radius: 20px;
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            color: #fff;
            background-image: radial-gradient(rgba(36, 99, 227, .2) 1px, transparent 1px);
            background-size: 22px 22px;
            margin-bottom: 0;
        }
        .cta-card h2 {
            font-size: min(32px, 4vw);
            line-height: 1.35;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-card p {
            font-size: 15px;
            opacity: .8;
            max-width: 520px;
            line-height: 1.7;
        }
        .cta-card .btn {
            flex-shrink: 0;
        }

        .site-footer {
            background: #0E2140;
            color: #B6C2D3;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding: 56px 0 40px;
        }
        .footer-brand .brand-mark {
            background: #fff;
            color: #0E2140;
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-about {
            font-size: 14px;
            color: #9FB0C4;
            line-height: 1.75;
            margin-top: 18px;
            max-width: 320px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
            color: #9FB0C4;
            line-height: 1.6;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .07);
            padding: 20px 0;
            text-align: left;
            font-size: 13px;
            color: #7E8FA3;
        }

        .back-top {
            position: fixed;
            right: 24px;
            bottom: 24px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card-hover);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
            z-index: 99;
            font-size: 18px;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary);
            color: #fff;
        }

        @media (max-width: 1024px) {
            .nav-toggle {
                display: flex;
            }
            .site-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 16px 30px rgba(27, 46, 90, .08);
                display: none;
                gap: 2px;
                max-height: calc(100vh - 64px);
                overflow-y: auto;
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav .nav-link {
                padding: 12px 14px;
                font-size: 16px;
                border-radius: 10px;
                width: 100%;
            }
            .site-nav .header-cta {
                margin-left: 0;
                margin-top: 14px;
                padding-top: 14px;
                border-top: 1px solid #F0F3F8;
                width: 100%;
            }
            .site-nav .header-cta .btn {
                width: 100%;
            }
            .section {
                padding-top: var(--space-section-md);
                padding-bottom: var(--space-section-md);
            }
            .compare-wrap {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .solution-feature-row {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .stage-list {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .case-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .faq-wrap {
                grid-template-columns: 1fr;
            }
            .faq-guide {
                position: static;
            }
            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .section {
                padding-top: var(--space-section-sm);
                padding-bottom: var(--space-section-sm);
            }
            .brand-text {
                font-size: 17px;
            }
            .page-banner {
                padding-top: 120px;
                padding-bottom: 32px;
            }
            .page-banner-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            .page-banner-art {
                width: 100%;
                height: auto;
                aspect-ratio: 16 / 7;
            }
            .page-kpi-row {
                grid-template-columns: 1fr 1fr !important;
                gap: 12px !important;
            }
            .page-kpi-grid {
                grid-template-columns: 1fr 1fr !important;
                gap: 12px;
                padding: 20px !important;
            }
            .stage-list {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .case-card {
                flex-direction: column;
            }
            .case-card-media {
                width: 100%;
                height: 140px;
            }
            .case-card-body {
                padding: 18px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 40px 0 24px;
            }
            .cta-card {
                border-radius: 16px;
                padding: 28px 24px;
            }
            .compare-col {
                padding: 24px;
            }
            .feature-media {
                aspect-ratio: 4 / 3;
            }
            .back-top {
                right: 16px;
                bottom: 16px;
                width: 40px;
                height: 40px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 14px;
            }
            .faq-answer-inner {
                margin: 0 18px;
                padding: 14px 0 18px;
                font-size: 14px;
            }
        }
        @media (max-width: 520px) {
            .stage-list {
                grid-template-columns: 1fr;
            }
            .page-kpi-row,
            .page-kpi-grid {
                grid-template-columns: 1fr 1fr !important;
            }
            .service-entry {
                padding: 18px !important;
            }
        }
        .page-kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            grid-template-rows: repeat(2, auto);
            gap: 16px;
            padding: 32px;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .page-kpi-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-bottom: 16px;
        }
        .page-kpi-row:last-child {
            margin-bottom: 0;
        }
        .kpi-box {
            text-align: center;
            padding: 20px 12px;
            border-radius: 12px;
            background: #F8FAFD;
            border: 1px solid rgba(225, 232, 242, .4);
        }
        .kpi-box .kpi-num {
            font-size: clamp(2rem, 2.8vw, 2.6rem);
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .kpi-box .kpi-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.4;
        }
        .kpi-box .kpi-trend {
            font-size: 12px;
            margin-top: 4px;
            color: var(--orange);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 2px;
        }

        .solution-affinity {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 40px;
            border-radius: var(--radius-card);
            border-left: 4px solid var(--primary);
            background: #EDF2FB;
            padding: 20px 24px;
        }
        .solution-affinity .icon {
            font-size: 28px;
            flex-shrink: 0;
        }
        .solution-affinity p {
            font-size: 15px;
            color: var(--text-primary);
            line-height: 1.7;
        }
        .solution-affinity strong {
            font-weight: 700;
            color: var(--primary);
        }

/* roulang page: category3 */
:root {
  --primary: #2463E3;
  --primary-dark: #1B46B0;
  --accent: #FF7A3C;
  --bg: #F5F8FC;
  --card-bg: #FFFFFF;
  --band-bg: #EDF2FB;
  --text: #1B2D4A;
  --text-muted: #61728C;
  --text-faint: #8A99B0;
  --border: #E1E8F2;
  --border-soft: #D7E0EA;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(27, 46, 90, .06);
  --shadow-md: 0 10px 24px rgba(27, 46, 90, .10);
  --header-h: 70px;
  --container: 1200px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, background .2s ease, box-shadow .25s ease, transform .2s ease, border-color .2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
}

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

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  color: var(--text);
  margin: 0 0 14px;
  font-weight: 700;
}

p {
  margin: 0 0 14px;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-right: auto;
  margin-left: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: #FFFFFF;
  box-shadow: 0 1px 0 rgba(27, 46, 90, .04);
  transition: box-shadow .25s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 6px 24px rgba(27, 46, 90, .08), 0 1px 0 rgba(27, 46, 90, .02);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
}

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

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--primary);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .03em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(36, 99, 227, .24);
}

.brand-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}

.nav-toggle {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  margin: 0 2px;
  border-radius: 10px;
  font-size: 15px;
  line-height: 22px;
  color: var(--text);
  font-weight: 500;
}

.nav-link span {
  display: block;
}

.nav-link.active {
  color: var(--primary);
  background: var(--band-bg);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--primary);
  background: var(--bg);
  outline: none;
}

.header-cta {
  margin-left: 12px;
  padding-left: 12px;
  border-left: 1px solid var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 20px;
  line-height: 1.4;
  background: var(--primary);
  color: #FFFFFF;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(27, 70, 176, .22);
}

.btn:focus-visible {
  outline: 3px solid rgba(36, 99, 227, .25);
  outline-offset: 2px;
}

.btn-pill {
  border-radius: var(--radius-pill);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, .7);
  color: #FFFFFF;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, .12);
  border-color: #FFFFFF;
  color: #FFFFFF;
  box-shadow: none;
}

.page-lead {
  position: relative;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 40px 0 48px;
}

.page-lead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 32%;
  opacity: .16;
  pointer-events: none;
}

.page-lead::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(245, 248, 252, 1) 0%, rgba(245, 248, 252, .9) 44%, rgba(237, 242, 251, .55) 100%);
  pointer-events: none;
}

.page-lead .container {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb-sep {
  color: var(--text-faint);
}

.lead-title {
  max-width: 820px;
}

h1 {
  font-size: clamp(34px, 5vw, 52px);
  letter-spacing: -.02em;
  margin: 0 0 18px;
  font-weight: 800;
}

.lead-desc {
  max-width: 820px;
  color: var(--text-muted);
  font-size: 16px;
  margin: 0;
}

.section {
  padding: 88px 0;
}

.section-tight {
  padding: 48px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}

.section-eyebrow::before {
  content: "";
  width: 14px;
  height: 2px;
  border-radius: 4px;
  background: var(--primary);
  margin-right: 8px;
}

.section-head h2 {
  font-size: 32px;
  line-height: 1.3;
  margin: 0;
}

.section-intro {
  max-width: 640px;
  color: var(--text-muted);
  margin: 0;
}

.news-feature {
  padding-bottom: 8px;
}

.feature-row {
  display: grid;
  grid-template-columns: 1.75fr 1fr;
  gap: 24px;
  align-items: stretch;
}

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

.feature-main {
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s ease, transform .25s ease;
}

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

.feature-cover {
  position: relative;
  height: 260px;
  overflow: hidden;
  background: var(--band-bg);
}

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

.feature-content {
  padding: 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}

.badge-blue {
  background: var(--band-bg);
  color: var(--primary);
}

.badge-orange {
  background: #FFF1EA;
  color: var(--accent);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--text-faint);
  font-size: 13px;
  margin: 16px 0 10px;
}

.feature-content h3 {
  font-size: 24px;
  line-height: 1.45;
  margin: 0 0 12px;
}

.feature-content h3 a {
  color: var(--text);
}

.feature-content h3 a:hover {
  color: var(--primary);
}

.feature-content p {
  color: var(--text-muted);
  margin: 0;
}

.feature-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.side-item {
  display: flex;
  gap: 14px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}

.side-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: #C7D4E8;
}

.side-thumb {
  width: 110px;
  height: 82px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--band-bg);
}

.side-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.side-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.side-body h3 {
  font-size: 16px;
  line-height: 1.55;
  margin: 0 0 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.side-body .date {
  font-size: 13px;
  color: var(--text-faint);
}

.topic-band {
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
}

.topic-band .section-head {
  margin-bottom: 26px;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.topic-list span {
  display: inline-flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-weight: 500;
}

.news-grid-section {
  background: var(--bg);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-card {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: #CBD9ED;
}

.news-cover {
  height: 210px;
  background: var(--band-bg);
  overflow: hidden;
}

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

.news-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-card-content .badge {
  margin-bottom: 12px;
}

.news-card-content h3 {
  font-size: 20px;
  margin: 0 0 10px;
  line-height: 1.5;
}

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

.news-card-content p {
  color: var(--text-muted);
  margin: 0;
  font-size: 15px;
}

.card-date {
  margin-top: auto;
  padding-top: 18px;
  font-size: 13px;
  color: var(--text-faint);
}

.updates-section {
  background: var(--band-bg);
}

.timeline-wrap {
  display: grid;
  grid-template-columns: 0.9fr 2.1fr;
  gap: 40px;
}

.timeline-intro h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.timeline-intro p {
  color: var(--text-muted);
  margin: 0;
}

.timeline {
  position: relative;
  margin: 0;
  padding-left: 28px;
  border-left: 2px solid #D6DFEE;
}

.timeline-item {
  position: relative;
  padding: 0 0 30px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 5px rgba(36, 99, 227, .12);
}

.timeline-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 6px;
}

.timeline-meta .badge {
  font-size: 12px;
}

.timeline-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.timeline-item h3 a:hover {
  color: var(--primary);
}

.timeline-item p {
  color: var(--text-muted);
  margin: 0;
  max-width: 760px;
}

.contact-strip-section {
  padding: 88px 0 96px;
}

.cta-panel {
  background: #0E2140;
  border-radius: var(--radius-lg);
  color: #FFFFFF;
  padding: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: 0 16px 36px rgba(14, 33, 64, .16);
}

.cta-panel h2 {
  color: #FFFFFF;
  font-size: 28px;
  margin-bottom: 14px;
}

.cta-panel p {
  color: #C7D4E6;
  margin: 0;
  max-width: 660px;
}

.cta-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 24px;
  font-size: 13px;
  color: #9FB0C8;
}

.cta-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.cta-meta span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.cta-action {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex-shrink: 0;
}

.site-footer {
  background: #0E2140;
  color: #9FB2C9;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
  gap: 48px;
  padding: 72px 0 48px;
}

.footer-brand .brand {
  margin-bottom: 20px;
}

.footer-brand .brand-text {
  color: #FFFFFF;
}

.footer-brand .footer-about {
  font-size: 14px;
  line-height: 1.85;
  margin: 0;
  max-width: 360px;
}

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

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a,
.footer-contact li {
  color: #A9B9CE;
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 22px 0;
  font-size: 14px;
  color: #7E91AA;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(36, 99, 227, .2);
  background: #FFFFFF;
  color: var(--primary);
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  z-index: 80;
}

.back-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--primary);
  color: #FFFFFF;
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    margin-left: auto;
    border: 0;
    border-radius: 10px;
    background: transparent;
    padding: 0;
  }

  .nav-toggle:hover {
    background: var(--bg);
  }

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

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

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

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

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    background: #FFFFFF;
    box-shadow: 0 24px 32px rgba(27, 46, 90, .16);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px 22px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
  }

  .nav-link.active {
    background: var(--band-bg);
  }

  .header-cta {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
    padding-top: 14px;
    margin-top: 10px;
    border-top: 1px solid var(--border);
  }

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

  .section {
    padding: 64px 0;
  }

  .feature-row {
    grid-template-columns: 1fr;
  }

  .feature-cover {
    height: 240px;
  }

  .timeline-wrap {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    padding: 36px;
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-action {
    width: 100%;
  }

  .cta-action .btn {
    flex: 1;
  }
}

@media (max-width: 767px) {
  .container {
    width: calc(100% - 32px);
  }

  .section {
    padding: 48px 0;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 26px;
  }

  .section-head h2 {
    font-size: 25px;
  }

  h1 {
    font-size: 32px;
  }

  .lead-desc {
    font-size: 15px;
  }

  .brand-text {
    font-size: 17px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 12px;
  }

  .feature-cover {
    height: 200px;
  }

  .feature-content {
    padding: 22px;
  }

  .feature-content h3 {
    font-size: 20px;
  }

  .side-item {
    flex-direction: column;
  }

  .side-thumb {
    width: 100%;
    height: 170px;
  }

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

  .news-cover {
    height: 190px;
  }

  .updates-section .section-head {
    margin-bottom: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 56px 0 32px;
  }

  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }

  .cta-panel {
    padding: 28px 24px;
    border-radius: var(--radius);
  }

  .cta-panel h2 {
    font-size: 24px;
  }

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

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

  .back-top {
    right: 18px;
    bottom: 20px;
    width: 40px;
    height: 40px;
  }

  .page-lead {
    padding: 34px 0 40px;
  }
}

@media (max-width: 480px) {
  .page-lead::before {
    opacity: .1;
  }

  .container {
    width: calc(100% - 24px);
  }

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

  .feature-title-wrap h3 {
    font-size: 20px;
  }

  .side-item {
    padding: 12px;
  }
}

/* roulang page: category4 */
:root {
  --primary: #2463E3;
  --primary-dark: #1B46B0;
  --accent: #FF7A3C;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --tinted: #EDF2FB;
  --text: #1B2D4A;
  --muted: #61728C;
  --light: #8A99B0;
  --border: #E1E8F2;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(27, 46, 90, 0.06);
  --shadow-md: 0 10px 24px rgba(27, 46, 90, 0.10);
  --header-h: 64px;
  --section-pad: 88px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll { overflow: hidden; }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--text); line-height: 1.35; }
h1 { font-size: clamp(2.25rem, 3.5vw, 3rem); font-weight: 700; letter-spacing: 0; }
h2 { font-size: clamp(1.65rem, 2.4vw, 2rem); font-weight: 700; letter-spacing: 0; }
h3 { font-size: 20px; font-weight: 600; }
img { max-width: 100%; display: block; }
p { margin: 0 0 16px; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: 0; background: none; cursor: pointer; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  background: var(--primary);
  color: #fff;
  border: 1px solid transparent;
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 8px 18px rgba(27, 70, 176, 0.22); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid rgba(36, 99, 227, 0.35); outline-offset: 2px; }
.btn-pill { border-radius: var(--radius-pill); }
.btn-outline { background: transparent; color: var(--primary); border-color: #B9C9E8; }
.btn-outline:hover { background: #F0F6FF; border-color: var(--primary); }
.btn-on-dark { background: #fff; color: var(--primary); }
.btn-on-dark:hover { background: #F0F5FE; }
.btn-ghost-dark { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, 0.55); }
.btn-ghost-dark:hover { background: rgba(255, 255, 255, 0.1); border-color: #fff; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
section, footer, header { display: block; }
.section { padding: var(--section-pad) 0; }
.section-band { background: var(--bg); }
.section-tinted { background: var(--tinted); }
.section-header { max-width: 680px; margin-bottom: 48px; }
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-header.center .eyebrow { margin-left: auto; margin-right: auto; }
.section-header p { color: var(--muted); margin: 12px 0 0; font-size: 16px; }

/* ======= Header & Navigation ======= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: #fff;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(27, 46, 90, 0.06);
  transition: box-shadow .25s ease;
}
.site-header.scrolled { box-shadow: 0 6px 20px rgba(27, 46, 90, 0.09); }
.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: 8px;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.01em;
  font-family: "DIN Alternate", "Bahnschrift", "Segoe UI", sans-serif;
  box-shadow: 0 6px 14px rgba(36, 99, 227, 0.25);
}
.brand-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  transition: color .2s ease;
}
.nav-link span {
  display: inline-block;
  padding: 8px 13px;
  border-radius: 10px;
  transition: background .2s ease, color .2s ease;
}
.nav-link:hover { color: var(--text); }
.nav-link:hover span { background: #F3F6FB; }
.nav-link.active { color: var(--primary); }
.nav-link.active span { background: #ECF2FF; color: var(--primary); font-weight: 600; }
.nav-link:focus-visible { outline: 3px solid rgba(36, 99, 227, 0.3); outline-offset: -2px; border-radius: 10px; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: 10px;
}
.nav-toggle:focus-visible { outline: 3px solid rgba(36, 99, 227, 0.3); }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .25s ease, opacity .25s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.header-cta { margin-left: 8px; }
.header-cta .btn { padding: 10px 22px; font-size: 14px; }

/* ======= Page Hero / 关于我们页头 ======= */
.site-main { padding-top: var(--header-h); }
.page-hero {
  position: relative;
  background: #E4ECF8 url("/assets/images/backpic/back-2.png") center / cover no-repeat;
  padding: 70px 0 64px;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.83) 55%, rgba(255, 255, 255, 0.55) 100%);
  pointer-events: none;
  z-index: 0;
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  color: var(--light);
  font-size: 13px;
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #C0C9D9; }
.page-hero-content { max-width: 760px; }
.page-hero h1 { margin-bottom: 18px; }
.page-hero .page-hero-desc {
  color: var(--muted);
  font-size: 17px;
  max-width: 640px;
  margin: 0;
}
.page-hero-actions { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ======= 通用图文区 ======= */
.about-intro { background: #fff; }
.about-wrap { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 56px; align-items: center; }
.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--tinted);
  aspect-ratio: 4 / 3;
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-copy p { color: var(--muted); margin-bottom: 18px; }
.about-copy p strong { color: var(--text); font-weight: 600; }
.brief-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 40px;
}
.brief-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.brief-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.brief-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #ECF2FF;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
}
.brief-item h3 { font-size: 16px; margin-bottom: 8px; }
.brief-item p { font-size: 14px; color: var(--muted); margin: 0; }

/* ======= 指标看板 ======= */
.metric-section { background: var(--bg); }
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.metric-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px 22px;
  text-align: center;
  transition: transform .25s ease, box-shadow .25s ease;
}
.metric-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.metric-label { font-size: 14px; color: var(--muted); margin-top: 6px; }
.metric-desc { font-size: 12px; color: var(--light); margin-top: 8px; line-height: 1.6; }
.metric-number {
  font-family: "DIN Alternate", "Bahnschrift", "Segoe UI", sans-serif;
  font-size: 38px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.metric-number small { font-size: 18px; font-weight: 600; margin-left: 2px; }
.metric-trend { color: var(--accent); font-weight: 600; font-size: 13px; }

/* ======= 服务能力卡 ======= */
.capability-section { background: #fff; }
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.capability-card {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.capability-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-left: 3px solid var(--primary); }
.capability-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  font-family: "DIN Alternate", sans-serif;
}
.capability-card h3 { font-size: 18px; margin-bottom: 6px; }
.capability-card p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.75; }

/* ======= 时间线 ======= */
.timeline-section { background: var(--tinted); }
.timeline-list {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 30px;
  border-left: 2px solid #CBD9EE;
}
.timeline-item { padding: 0 0 42px 28px; position: relative; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(36, 99, 227, 0.12);
}
.timeline-year {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  font-family: "DIN Alternate", "Segoe UI", sans-serif;
}
.timeline-item h3 { font-size: 18px; margin-bottom: 6px; }
.timeline-item p { margin: 0; color: var(--muted); font-size: 15px; }

/* ======= 团队与原则 ======= */
.team-section { background: #fff; }
.team-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.team-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--tinted);
  aspect-ratio: 4 / 3;
}
.team-image img { width: 100%; height: 100%; object-fit: cover; }
.team-copy p { color: var(--muted); }
.team-groups { margin-top: 14px; display: grid; gap: 12px; }
.team-group {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.team-group strong { font-size: 15px; color: var(--primary); }
.team-group span { font-size: 14px; color: var(--muted); }
.principle-wrap { margin-top: 56px; background: var(--tinted); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 36px; }
.principle-wrap h3 { margin-bottom: 18px; }
.principle-list { display: grid; gap: 16px; }
.principle-item { display: grid; grid-template-columns: 34px 1fr; gap: 12px; }
.principle-index {
  color: var(--accent);
  font-weight: 800;
  font-family: "DIN Alternate", sans-serif;
  font-size: 16px;
  line-height: 1.8;
}
.principle-item p { margin: 0; font-size: 15px; color: var(--muted); }
.principle-item strong { color: var(--text); }

/* ======= FAQ ======= */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s ease;
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.open { box-shadow: var(--shadow-sm); border-color: #CBD9EE; }
.faq-question {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  text-align: left;
  padding: 20px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ECF2FF;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  line-height: 1;
  transition: transform .25s ease, background .25s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer p { margin: 0; padding: 0 22px 22px; color: var(--muted); font-size: 15px; }

/* ======= CTA / 联系 ======= */
.contact-section { background: #fff; }
.cta-card {
  background: var(--primary);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 48px;
  color: #fff;
  box-shadow: 0 18px 44px rgba(27, 46, 90, 0.22);
  scroll-margin-top: 120px;
}
.cta-card h2 { color: #fff; margin-bottom: 10px; }
.cta-card p { color: rgba(255, 255, 255, 0.85); margin: 0; font-size: 15px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.cta-actions .btn { min-width: 150px; }
.cta-note { margin-top: 14px; font-size: 13px; color: rgba(255, 255, 255, 0.7); }

/* ======= Footer ======= */
.site-footer {
  background: #0E2140;
  color: #B7C4D8;
  font-size: 14px;
}
.site-footer .container { padding-top: 0; padding-bottom: 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 48px;
  padding: 64px 0 40px;
}
.footer-brand .brand-text { color: #fff; }
.footer-about { margin: 18px 0 10px; line-height: 1.8; max-width: 300px; }
.footer-title { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #B7C4D8; transition: color .2s ease; }
.footer-links a:hover { color: #fff; }
.footer-contact li { margin-bottom: 10px; color: #B7C4D8; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  font-size: 13px;
  color: #7C8AA6;
}
.footer-bottom .container { display: flex; align-items: center; justify-content: center; }

/* ======= BackTop ======= */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 60;
  font-size: 20px;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}
.to-top.show { display: flex; }
.to-top:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.to-top:focus-visible { outline: 3px solid rgba(36, 99, 227, 0.35); outline-offset: 2px; }

/* ======= 响应式 ======= */
@media (max-width: 1199px) {
  .container { padding: 0 28px; }
}
@media (max-width: 1023px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 18px 26px rgba(27, 46, 90, 0.10);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin-left: 0;
    z-index: 99;
  }
  .site-nav.open { display: flex; }
  .nav-link { width: 100%; margin: 2px 0; }
  .nav-link span { display: block; padding: 12px 14px; }
  .header-cta { margin: 10px 0 0; width: 100%; }
  .header-cta .btn { width: 100%; }
  .about-wrap, .team-grid, .cta-card { grid-template-columns: 1fr; }
  .cta-card { padding: 36px; }
  .cta-actions { justify-content: flex-start; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; padding-top: 48px; }
}
@media (max-width: 767px) {
  :root { --section-pad: 64px; }
  .container { padding: 0 20px; }
  .page-hero { padding: 48px 0 52px; }
  .brief-list { grid-template-columns: 1fr; }
  .metric-grid { gap: 16px; }
  .metric-card { padding: 22px 16px; }
  .metric-label { font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 24px; }
  .timeline-list { padding-left: 22px; }
  .timeline-item { padding-left: 18px; }
  .cta-card { padding: 28px 24px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .to-top { right: 16px; bottom: 16px; }
}
@media (max-width: 520px) {
  .about-wrap, .team-grid { gap: 28px; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .metric-number { font-size: 30px; }
  .page-hero h1 { font-size: 1.8rem; }
  .page-hero .page-hero-desc { font-size: 15px; }
  .team-group { grid-template-columns: 1fr; gap: 2px; }
  .principle-wrap { padding: 22px 20px; }
  .capability-card { grid-template-columns: 1fr; padding: 20px; }
  .faq-icon { width: 20px; height: 20px; font-size: 16px; }
  .footer-grid { gap: 28px; }
}