/* roulang page: index */
:root {
  --primary: #245CDF;
  --primary-hover: #1843B9;
  --primary-light: #EAF0FB;
  --accent: #0B8F87;
  --warning: #EF9A3F;
  --page-bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --text-dark: #1D2B45;
  --text-main: #41536C;
  --text-weak: #6C7E95;
  --border: #DCE4EF;
  --border-light: #E3E9F2;
  --disabled: #A0AEBD;
  --radius-xl: 18px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 8px 24px rgba(34, 60, 103, 0.06);
  --shadow-hover: 0 16px 36px rgba(34, 60, 103, 0.10);
  --shadow-float: 0 12px 32px rgba(34, 60, 103, 0.14);
  --container: 1200px;
  --header-height: 72px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--page-bg);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.55);
  outline-offset: 3px;
}

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: 1rem;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.kicker i {
  font-size: 12px;
}

.section-head h2 {
  color: var(--text-dark);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.4;
  font-weight: 700;
  margin: 18px 0 14px;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--text-weak);
  font-size: 17px;
  line-height: 1.8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 10px;
  padding: 14px 26px;
  font-weight: 600;
  font-size: 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  min-height: 48px;
  white-space: nowrap;
}

.btn i {
  font-size: 14px;
  transition: transform 0.2s var(--ease);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(36, 92, 223, 0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(36, 92, 223, 0.28);
}

.btn-primary:active {
  transform: translateY(0);
  opacity: 0.92;
}

.btn-primary:hover i {
  transform: translateX(4px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: rgba(36, 92, 223, 0.45);
}

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

.btn-light {
  background: #fff;
  color: var(--primary);
  border-color: var(--border);
  box-shadow: 0 6px 18px rgba(34, 60, 103, 0.08);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid rgba(220, 228, 239, 0.9);
  backdrop-filter: none;
}

.nav-wrap {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text-dark);
  font-size: 21px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  flex: 0 0 auto;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 18px;
  color: var(--text-main);
  font-weight: 500;
  font-size: 15.5px;
  border-radius: 8px;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--text-dark);
  background: rgba(36, 92, 223, 0.05);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-dark);
  font-size: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-toggle:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

/* Hero */
.hero {
  position: relative;
  padding: 84px 0 112px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, #f6f8fb 0%, #edf2fa 55%, #e7eefb 100%);
  z-index: -2;
}

.hero-bg {
  position: absolute;
  right: -80px;
  top: -100px;
  width: 720px;
  height: 720px;
  background-image: url("/assets/images/backpic/back-2.webp");
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: -1;
  mask-image: linear-gradient(135deg, transparent 20%, #000 100%);
  -webkit-mask-image: linear-gradient(135deg, transparent 20%, #000 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 64px;
}

.hero-copy {
  max-width: 580px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  box-shadow: 0 4px 14px rgba(34, 60, 103, 0.05);
  margin-bottom: 24px;
}

.badge i {
  color: var(--accent);
  font-size: 12px;
}

.hero h1 {
  font-size: clamp(32px, 4.2vw, 44px);
  line-height: 1.2;
  color: var(--text-dark);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.hero h1 .highlight {
  color: var(--primary);
}

.hero-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-weak);
  font-size: 14px;
}

.hero-note i {
  color: var(--accent);
}

.hero-visual {
  position: relative;
}

.hero-img-card {
  background: #fff;
  border-radius: 20px;
  padding: 10px;
  box-shadow: var(--shadow-float);
  border: 1px solid var(--border-light);
}

.hero-img-card img {
  width: 100%;
  border-radius: 14px;
  object-fit: cover;
}

.hero-info {
  position: absolute;
  left: -24px;
  bottom: 24px;
  background: #fff;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-float);
  border-radius: 14px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-info .pulse {
  width: 10px;
  height: 10px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(11, 143, 135, 0.14);
  border-radius: 50%;
}

.hero-info strong {
  color: var(--text-dark);
  font-size: 15px;
  display: block;
  line-height: 1.3;
}

.hero-info span {
  color: var(--text-weak);
  font-size: 13px;
}

/* Stats */
.stats {
  margin-top: -46px;
  position: relative;
  z-index: 5;
}

.stats-grid {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  padding: 16px 12px;
  border-right: 1px solid var(--border);
}

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

.stat-card .num {
  display: inline-block;
  color: var(--text-dark);
  font-size: clamp(30px, 3vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat-card .unit {
  color: var(--text-main);
  font-weight: 600;
  margin-left: 6px;
}

.stat-card p {
  color: var(--text-weak);
  font-size: 15px;
  margin-top: 8px;
}

.stat-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--accent);
  margin-top: 10px;
  font-weight: 500;
}

/* Services */
.services {
  padding: 112px 0 96px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: auto;
  gap: 28px;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease), border-color 0.3s ease;
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(36, 92, 223, 0.3);
}

.service-card--feature {
  grid-column: span 2;
  grid-row: span 2;
}

.service-card__media {
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: var(--primary-light);
}

.service-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-card:hover .service-card__media img {
  transform: scale(1.03);
}

.service-card__body {
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.service-tag {
  display: inline-flex;
  align-self: flex-start;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 13px;
  margin-bottom: 14px;
}

.service-card h3 {
  color: var(--text-dark);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.service-card p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  margin-top: 18px;
  transition: gap 0.2s ease;
}

.card-link:hover {
  gap: 12px;
  color: var(--primary-hover);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 16px;
}

.service-card:not(.service-card--feature) .service-card__body {
  padding: 24px 24px 22px;
}

.service-card:not(.service-card--feature) h3 {
  font-size: 17px;
}

.service-card:not(.service-card--feature) p {
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Compare */
.compare {
  background: linear-gradient(180deg, #fff 0%, #f3f6fb 100%);
  padding: 96px 0;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  gap: 0;
}

.compare-col {
  padding: 36px;
  border-radius: var(--radius-lg);
}

.compare-col.muted {
  background: #f2f4f8;
  border: 1px solid var(--border);
}

.compare-col.highlighted {
  background: #fff;
  border: 1px solid rgba(36, 92, 223, 0.35);
  box-shadow: var(--shadow-card);
}

.compare-type {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 22px;
}

.compare-col.muted .compare-type {
  color: var(--text-weak);
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.compare-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
}

.compare-list li i {
  flex: 0 0 auto;
  margin-top: 6px;
  font-size: 13px;
}

.compare-list li.is-muted i {
  color: var(--disabled);
}

.compare-list li.is-good i {
  color: var(--accent);
}

.compare-or {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-weak);
  font-weight: 600;
  font-size: 14px;
}

.compare-or .vs-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 18px;
  box-shadow: var(--shadow-card);
}

.compare-special {
  margin-top: 28px;
}

/* News */
.news {
  padding: 112px 0 96px;
}

.news-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 48px;
}

.news-list {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 8px 28px;
}

.news-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 24px;
}

.news-item:last-child {
  border-bottom: none;
}

.news-meta-line {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-weak);
  font-size: 13px;
  grid-column: 1 / -1;
}

.news-cat {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
}

.news-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.6;
  grid-column: 1 / -1;
}

.news-item h3 a {
  transition: color 0.2s ease;
}

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

.news-excerpt {
  color: var(--text-weak);
  font-size: 14.5px;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  grid-column: 1 / -1;
}

.news-arrow {
  display: none;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  grid-column: 2;
  grid-row: 2;
  align-self: center;
  transition: all 0.2s ease;
}

.news-item:hover .news-arrow {
  background: var(--primary);
  color: #fff;
}

.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--text-weak);
}

.empty-state i {
  display: block;
  font-size: 36px;
  color: var(--disabled);
  margin-bottom: 18px;
}

/* FAQ */
.faq-section {
  padding: 112px 0 96px;
  background: #fff;
  border-top: 1px solid var(--border-light);
}

.faq-wrap {
  max-width: 920px;
  margin: 0 auto;
}

.faq-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.faq-head h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--text-dark);
  font-weight: 700;
}

.faq-head p {
  color: var(--text-weak);
  margin-top: 12px;
  font-size: 16px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item.active {
  border-color: rgba(36, 92, 223, 0.5);
  box-shadow: var(--shadow-card);
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 22px 50px 22px 24px;
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 17px;
  cursor: pointer;
  display: block;
  position: relative;
  transition: color 0.2s ease;
}

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

.faq-q .faq-icon {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-style: normal;
  transition: all 0.25s var(--ease);
}

.faq-item.active .faq-q .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: translateY(-50%) rotate(135deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease);
}

.faq-a-inner {
  padding: 0 24px 24px 24px;
  color: var(--text-main);
  font-size: 15.5px;
  line-height: 1.9;
}

/* Contact */
.contact-section {
  padding: 96px 0;
  background: linear-gradient(150deg, #f6f8fb 0%, #eaf0fb 100%);
}

.contact-wrap {
  background: #fff;
  border-radius: 22px;
  box-shadow: var(--shadow-float);
  overflow: hidden;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
}

.contact-intro {
  background: var(--primary);
  color: #fff;
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-intro h2 {
  color: #fff;
  font-size: 26px;
  line-height: 1.5;
  margin-bottom: 16px;
  font-weight: 700;
}

.contact-intro p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 15.5px;
  line-height: 1.9;
  margin-bottom: 28px;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 12px;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.92);
}

.contact-list li i {
  width: 20px;
  text-align: center;
  margin-top: 3px;
  color: #fff;
}

.contact-form {
  padding: 44px 40px;
  background: #fff;
}

.form-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.form-sub {
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 14px;
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  height: 48px;
  border: 1px solid #D3DCE8;
  border-radius: 10px;
  padding: 12px 16px;
  background: #fff;
  color: var(--text-dark);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-size: 15px;
}

textarea.form-control {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 92, 223, 0.15);
  outline: none;
}

.form-privacy {
  color: var(--text-weak);
  font-size: 13px;
  margin-top: 16px;
  text-align: center;
}

/* Footer */
.site-footer {
  background: #f0f4f9;
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

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

.footer-brand {
  font-size: 21px;
  color: var(--text-dark);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-about {
  color: var(--text-weak);
  font-size: 14.5px;
  line-height: 1.9;
  max-width: 360px;
}

.footer-col h4 {
  color: var(--text-dark);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col ul a {
  color: var(--text-main);
  font-size: 14.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col ul a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 2px;
  background: var(--border);
  transition: background 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-col ul a:hover::before {
  background: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  color: var(--disabled);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 16px;
}

/* Responsive */
@media (max-width: 1199px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
  .service-card__media {
    height: 180px;
  }
}

@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 24px 26px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 30px rgba(34, 60, 103, 0.12);
    display: none;
    z-index: 99;
  }

  .main-nav.open {
    display: flex;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .nav-link {
    padding: 14px 16px;
    min-height: 50px;
    font-size: 17px;
    border-radius: 10px;
  }

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

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .hero {
    padding: 60px 0 90px;
  }

  .hero-visual {
    max-width: 560px;
  }

  .hero-info {
    left: 12px;
    bottom: 16px;
  }

  .stats {
    margin-top: -30px;
  }

  .stats-grid {
    padding: 24px;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stat-card {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 12px;
  }

  .stat-card:nth-child(3),
  .stat-card:nth-child(4) {
    border-bottom: none;
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .compare-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .compare-or {
    flex-direction: row;
  }

  .compare-or .vs-badge {
    width: 46px;
    height: 46px;
    font-size: 15px;
  }

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

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

@media (max-width: 767px) {
  .section {
    padding: 72px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .nav-wrap {
    gap: 12px;
  }

  .brand {
    font-size: 19px;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px;
    gap: 12px;
  }

  .stat-card {
    padding: 10px 6px;
  }

  .stat-card .num {
    font-size: 28px;
  }

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

  .service-card--feature {
    grid-column: auto;
    grid-row: auto;
  }

  .service-card__media {
    height: 200px;
  }

  .compare-col {
    padding: 24px;
  }

  .compare-or {
    margin: 8px 0;
  }

  .news-head-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .news-list {
    padding: 0 18px;
  }

  .news-item {
    padding: 22px 0;
  }

  .news-item h3 {
    font-size: 16px;
  }

  .contact-intro,
  .contact-form {
    padding: 30px 22px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 36px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .compare-grid {
    align-items: stretch;
  }

  .contact-list {
    gap: 10px;
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .stat-card p {
    font-size: 14px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-lead {
    font-size: 16.5px;
  }
}

/* roulang page: article */
:root {
  --primary: #245CDF;
  --primary-hover: #1843B9;
  --primary-soft: #EAF0FB;
  --accent: #0B8F87;
  --warning: #EF9A3F;
  --bg: #F6F8FB;
  --surface: #FFFFFF;
  --text: #1D2B45;
  --text-secondary: #41536C;
  --text-muted: #6C7E95;
  --border: #DCE4EF;
  --border-strong: #D3DCE8;
  --disable: #A0AEBD;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 8px 24px rgba(34, 60, 103, 0.06);
  --shadow-hover: 0 16px 36px rgba(34, 60, 103, 0.10);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.fixed-nav {
  padding-top: 76px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
}

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

.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 700;
  box-shadow: 0 6px 14px rgba(36, 92, 223, 0.26);
}

.brand span:last-child {
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 38px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 2px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.nav-link:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.4);
  outline-offset: 4px;
  border-radius: 4px;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  border-radius: 99px;
  background: var(--primary);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 20px;
  color: var(--text);
  transition: background 0.2s ease;
}

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

.nav-toggle:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.4);
  outline-offset: 2px;
}

.post-banner {
  position: relative;
  padding: 58px 0 40px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.post-banner::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -160px;
  top: -220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36, 92, 223, 0.08) 0%, rgba(36, 92, 223, 0) 68%);
  pointer-events: none;
}

.crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.crumbs a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

.crumbs .sep {
  color: var(--border-strong);
}

.banner-title {
  font-size: 40px;
  line-height: 1.25;
  font-weight: 700;
  max-width: 940px;
  color: var(--text);
  letter-spacing: -0.4px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-muted);
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
}

.meta-icon {
  margin-right: 4px;
  color: var(--text-muted);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  padding-top: 40px;
  padding-bottom: 80px;
  align-items: start;
}

.article-panel {
  background: var(--surface);
  border: 1px solid rgba(220, 228, 239, 0.8);
  border-radius: 18px;
  padding: 48px 52px;
  box-shadow: var(--shadow-card);
}

.article-content {
  font-size: 17px;
  line-height: 1.95;
  color: var(--text-secondary);
  word-break: break-word;
}

.article-content h2 {
  font-size: 27px;
  color: var(--text);
  margin: 44px 0 18px;
  font-weight: 700;
  line-height: 1.4;
}

.article-content h3 {
  font-size: 21px;
  color: var(--text);
  margin: 36px 0 14px;
  font-weight: 650;
  line-height: 1.5;
}

.article-content h4 {
  font-size: 18px;
  color: var(--text);
  margin: 28px 0 12px;
  font-weight: 600;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content strong {
  color: var(--text);
  font-weight: 600;
}

.article-content ul,
.article-content ol {
  margin: 0 0 24px;
  padding-left: 4px;
}

.article-content ul li,
.article-content ol li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}

.article-content ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.78em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.75;
}

.article-content ol {
  counter-reset: article-item;
}

.article-content ol li {
  counter-increment: article-item;
  padding-left: 32px;
}

.article-content ol li::before {
  content: counter(article-item) ".";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--primary);
  font-weight: 600;
}

.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(36, 92, 223, 0.3);
  transition: color 0.2s, border-color 0.2s;
}

.article-content a:hover {
  color: var(--primary-hover);
  border-color: var(--primary-hover);
}

.article-content blockquote {
  margin: 30px 0;
  padding: 18px 24px;
  background: var(--bg);
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
}

.article-content img {
  border-radius: 14px;
  margin: 30px auto;
  box-shadow: var(--shadow-card);
}

.article-content table {
  width: 100%;
  margin: 26px 0;
  border-collapse: collapse;
  font-size: 15px;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
  background: #fff;
}

.article-content th {
  background: var(--primary-soft);
  color: var(--text);
  font-weight: 600;
}

.article-content code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
  font-size: 0.9em;
  color: var(--primary);
}

.article-tags {
  margin-top: 46px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: 7px;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.tag-item i {
  color: var(--text-muted);
  font-size: 12px;
}

.content-footer-links {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 14px;
}

.content-footer-links a {
  color: var(--primary);
  font-weight: 500;
}

.content-footer-links a:hover {
  color: var(--primary-hover);
}

.article-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.sidebar-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 8px;
}

.sidebar-card-title i {
  color: var(--primary);
  font-size: 16px;
}

.sidebar-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

.sidebar-list {
  margin-top: 8px;
}

.sidebar-list li {
  border-top: 1px solid var(--border);
}

.sidebar-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 2px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s;
}

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

.sidebar-list a i {
  color: var(--text-muted);
  font-size: 13px;
}

.aside-image-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.aside-image-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.aside-image-mask {
  padding: 18px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.aside-image-mask h4 {
  font-size: 16px;
  color: var(--text);
  font-weight: 650;
  margin-bottom: 4px;
}

.aside-image-mask p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

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

.side-box {
  background: var(--primary-soft);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid rgba(36, 92, 223, 0.14);
  box-shadow: var(--shadow-card);
}

.side-box h4 {
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 8px;
}

.side-box p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.btn-primary,
.btn-light,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 15px;
  min-height: 46px;
  padding: 0 22px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(36, 92, 223, 0.24);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(36, 92, 223, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  opacity: 0.94;
}

.btn-primary:focus-visible,
.btn-light:focus-visible,
.btn-outline:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.45);
  outline-offset: 3px;
}

.btn-light {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--border-strong);
  min-width: 48px;
}

.btn-light:hover {
  border-color: var(--primary);
  color: var(--primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-soft);
}

.related-section {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 64px 0 72px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.section-sub {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 8px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
}

.related-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(36, 92, 223, 0.25);
  transform: translateY(-4px);
}

.related-card .dot-sign {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 15px;
  margin-bottom: 18px;
}

.related-card h3 {
  font-size: 18px;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 8px;
  font-weight: 650;
}

.related-card p {
  font-size: 14px;
  color: var(--text-muted);
}

.site-footer {
  background: #F0F4F9;
  border-top: 1px solid var(--border);
}

.site-footer .container {
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.footer-brand .brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  font-size: 16px;
}

.footer-about {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 390px;
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 14px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-col ul a:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  background: rgba(230, 238, 247, 0.55);
}

.footer-bottom .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.footer-bottom span {
  font-size: 13px;
  color: var(--text-muted);
}

.empty-wrap {
  padding: 70px 0 90px;
  display: flex;
  justify-content: center;
}

.notfound-card {
  width: 100%;
  max-width: 720px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  text-align: center;
  padding: 84px 40px;
  box-shadow: var(--shadow-card);
}

.notfound-icon {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 24px;
}

.notfound-card h2 {
  font-size: 28px;
  color: var(--text);
  margin-bottom: 12px;
  font-weight: 700;
}

.notfound-card p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

@media (max-width: 1199px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 32px;
  }

  .article-panel {
    padding: 38px 40px;
  }

  .related-grid {
    gap: 18px;
  }
}

@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 28px rgba(34, 60, 103, 0.08);
    align-items: stretch;
    flex-direction: column;
    gap: 4px;
  }

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

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 50px;
    border-radius: 9px;
    padding: 0 12px;
    font-size: 17px;
  }

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

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

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

  .article-layout {
    grid-template-columns: 1fr;
    padding-top: 32px;
    padding-bottom: 60px;
  }

  .article-panel {
    padding: 32px;
  }

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

@media (max-width: 767px) {
  .site-header .container {
    height: 68px;
  }

  .brand {
    font-size: 18px;
    gap: 8px;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
    font-size: 16px;
  }

  .post-banner {
    padding: 44px 0 28px;
  }

  .banner-title {
    font-size: 28px;
  }

  .crumbs {
    font-size: 13px;
  }

  .article-panel {
    padding: 24px 20px;
    border-radius: 14px;
  }

  .article-content {
    font-size: 16px;
    line-height: 1.9;
  }

  .article-content h2 {
    font-size: 22px;
    margin-top: 34px;
  }

  .article-content h3 {
    font-size: 19px;
  }

  .section-title {
    font-size: 24px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

@media (max-width: 520px) {
  .container {
    width: calc(100% - 40px);
  }

  .brand span:last-child {
    font-size: 17px;
  }

  .post-meta {
    gap: 10px;
  }

  .banner-title {
    font-size: 25px;
  }

  .article-panel {
    padding: 22px 16px;
  }

  .sidebar-card,
  .side-box {
    padding: 20px 18px;
  }

  .footer-bottom .container {
    gap: 4px;
  }
}

/* roulang page: category1 */
:root{
  --primary:#245CDF;
  --primary-dark:#1843B9;
  --primary-soft:#EAF0FB;
  --teal:#0B8F87;
  --amber:#EF9A3F;
  --page-bg:#F6F8FB;
  --white:#FFFFFF;
  --text:#1D2B45;
  --text2:#41536C;
  --muted:#6C7E95;
  --disable:#A0AEBD;
  --line:#DCE4EF;
  --line-strong:#E3E9F2;
  --radius:14px;
  --radius-sm:8px;
  --radius-md:10px;
  --shadow-sm:0 8px 24px rgba(34,60,103,0.06);
  --shadow-lg:0 16px 36px rgba(34,60,103,0.10);
  --container:1200px;
  --nav-h:72px;
  --section-space:96px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
  background:var(--page-bg);color:var(--text);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,textarea{font:inherit;border:none;outline:none;background:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
.main-wrap{overflow:clip}

/* 焦点状态 */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid rgba(36,92,223,0.55);
  outline-offset:3px;border-radius:4px;
}
::selection{background:var(--primary-soft);color:var(--primary-dark)}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,0.97);
  border-bottom:1px solid var(--line);
}
.nav-wrap{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:21px;font-weight:700;letter-spacing:.5px;
  color:var(--text);white-space:nowrap;
}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;flex:0 0 34px;
}
.main-nav{display:flex;align-items:center;gap:38px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;min-height:44px;
  font-size:15px;font-weight:500;color:var(--text2);
  transition:color .2s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:7px;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  font-size:22px;color:var(--text);cursor:pointer;border-radius:10px;
  transition:background .2s ease;
}
.nav-toggle:hover{background:var(--primary-soft)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:46px;padding:0 30px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;transition:all .25s ease;
}
.btn-primary{
  background:var(--primary);color:#fff;
  box-shadow:0 10px 24px rgba(36,92,223,0.22);
}
.btn-primary:hover{
  background:var(--primary-dark);transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(36,92,223,0.30);
}
.btn-primary:active{transform:translateY(0);opacity:.93}
.btn-ghost{
  background:#fff;color:var(--primary);
  border:1px solid #c3d4f2;
}
.btn-ghost:hover{background:var(--primary-soft);border-color:var(--primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0);opacity:.92}

/* ===== 分类页头 ===== */
.cat1-head{
  position:relative;
  background:linear-gradient(rgba(248,250,253,0.92),rgba(248,250,253,0.96)),url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border-bottom:1px solid var(--line);
  padding:54px 0 60px;
}
.crumb{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--muted);margin-bottom:24px;
}
.crumb a{color:var(--muted);transition:color .2s ease}
.crumb a:hover{color:var(--primary)}
.cat1-head-grid{
  display:grid;grid-template-columns:1.25fr .75fr;gap:72px;
  align-items:center;
}
.mini-tag{
  display:inline-flex;padding:7px 14px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);
  font-size:14px;font-weight:600;letter-spacing:.2px;margin-bottom:18px;
}
.cat1-head h1{
  font-size:40px;line-height:1.22;font-weight:700;letter-spacing:.5px;
  margin-bottom:20px;
}
.lede{
  font-size:17px;line-height:1.8;color:var(--text2);
  max-width:680px;margin-bottom:30px;
}
.head-actions{display:flex;flex-wrap:wrap;gap:16px}
.head-sidecard{
  background:#fff;border:1px solid var(--line-strong);
  border-radius:16px;padding:14px;box-shadow:var(--shadow-sm);
}
.head-sidecard img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;
  background:var(--primary-soft);
}
.float-note{
  display:flex;gap:12px;padding:14px 12px 6px;
}
.float-note i{
  width:38px;height:38px;flex:0 0 38px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);
  border-radius:10px;font-size:16px;
}
.float-note strong{font-size:15px;font-weight:600}
.float-note p{font-size:13px;color:var(--muted);line-height:1.55;margin-top:3px}

/* ===== 版面通用 ===== */
.section{padding:96px 0}
.section .container{max-width:var(--container)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:42px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700}
.section-sub{color:var(--muted);font-size:14px;margin-top:8px;max-width:700px}
.alt-bg{background:var(--page-bg)}
.white-bg{background:#fff}
.small-note{color:var(--muted);font-size:14px}

/* ===== 图文介绍 / 信息分组 ===== */
.guide-intro{
  display:grid;grid-template-columns:5fr 7fr;gap:64px;
  background:#fff;border:1px solid var(--line-strong);
  border-radius:20px;padding:48px;
  box-shadow:var(--shadow-sm);align-items:center;
}
.guide-intro-visual{
  border-radius:14px;overflow:hidden;position:relative;
  background:var(--primary-soft);
}
.guide-intro-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
}
.guide-intro-copy h3{font-size:26px;font-weight:700;line-height:1.4;margin-bottom:14px}
.guide-intro-copy p{color:var(--text2);font-size:16px}
.guide-rule{
  display:flex;gap:12px;margin-top:22px;padding:16px 18px;
  background:var(--page-bg);border-left:3px solid var(--teal);
  border-radius:10px;color:var(--text2);font-size:15px;
}
.guide-rule i{color:var(--teal);font-size:17px;margin-top:3px}

/* 入口确认区 */
.guard-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.guard-card{
  background:#fff;border:1px solid var(--line-strong);
  border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);
  transition:transfrom .25s ease,box-shadow .25s ease;
}
.guard-feature{grid-column:span 4;background:linear-gradient(180deg,#fff,#FBFCFE);}
.guard-normal{grid-column:span 3}
.guard-mini{grid-column:span 3}
.guard-card:hover{box-shadow:var(--shadow-lg)}
.icon-square{
  width:48px;height:48px;border-radius:12px;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:21px;margin-bottom:18px;
}
.guard-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.guard-card p{font-size:15px;color:var(--text2);line-height:1.75}
.diff-check{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.diff-item{
  display:flex;gap:10px;padding:12px 14px;border-radius:10px;
  background:var(--page-bg);font-size:14px;color:var(--text2);
}
.diff-item i{margin-top:3px;font-size:14px}
.diff-item.ok{color:var(--teal)}
.diff-item.ok i{color:var(--teal)}

/* 风险清单 */
.risk-grid{
  display:grid;grid-template-columns:5fr 7fr;gap:56px;
}
.risk-intro h3{font-size:26px;line-height:1.4;margin-bottom:14px;font-weight:700}
.risk-intro p{color:var(--text2);margin-bottom:18px}
.risk-key{
  background:var(--amber);border-radius:7px;padding:2px 10px;
  color:#fff;font-size:12px;font-weight:600;
}
.risk-list{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line-strong);
  border-radius:20px;padding:8px 28px;box-shadow:var(--shadow-sm);
}
.risk-row{
  display:grid;grid-template-columns:44px 1fr;gap:18px;
  padding:24px 0 26px;border-bottom:1px solid var(--line);
}
.risk-row:last-child{border-bottom:none}
.risk-num{
  width:36px;height:36px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;
}
.risk-row strong{display:block;font-size:16px}
.risk-row p{color:var(--muted);font-size:14px;margin-top:4px}

/* ===== 步骤流程 ===== */
.steps-flow{
  background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cat-flag{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--primary);background:var(--primary-soft);
  padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:600;margin-bottom:14px;
}
.flow-steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  position:relative;margin-top:42px;
}
.flow-step{
  position:relative;padding:28px 24px;background:var(--page-bg);
  border:1px solid var(--page-bg);border-radius:16px;
  transition:box-shadow .25s ease,background .25s ease;
}
.flow-step:hover{box-shadow:var(--shadow-lg);background:#fff}
.step-no{
  width:40px;height:40px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;margin-bottom:18px;
}
.flow-step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.flow-step p{font-size:14px;line-height:1.7;color:var(--muted)}
.flow-line{
  width:24px;height:2px;background:var(--primary);opacity:.22;
  margin:0 10px;align-self:center;
}

/* ===== 对比模块 ===== */
.compare-wrap{
  display:grid;grid-template-columns:1fr 84px 1fr;gap:8px;
  align-items:stretch;
}
.compare-card{
  border-radius:18px;padding:38px 36px;
}
.compare-card .vs-title{font-size:17px;font-weight:700;margin-bottom:22px}
.compare-before{background:var(--page-bg);border:1px solid var(--line)}
.compare-after{background:var(--primary-soft);border:1px solid rgba(36,92,223,0.25);position:relative}
.compare-after::after{
  content:"推荐";position:absolute;top:22px;right:28px;
  background:var(--primary);color:#fff;font-size:12px;
  padding:4px 12px;border-radius:999px;
}
.compare-list{display:flex;flex-direction:column;gap:16px}
.compare-list li{display:flex;gap:12px;color:var(--text2);font-size:15px}
.compare-list li i{min-width:20px;margin-top:3px;font-size:14px}
.compare-before .compare-list li i{color:#9AA9BC}
.compare-after .compare-list li{color:var(--text)}
.compare-after .compare-list li i{color:var(--primary)}
.vs-middle{
  display:flex;align-items:center;justify-content:center;
}
.vs-badge{
  width:52px;height:52px;border-radius:50%;background:#fff;
  color:var(--primary);font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);box-shadow:var(--shadow-sm);
}

/* service strip */
.service-strip{
  background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.service-rows{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-unit{
  border:1px solid var(--line-strong);border-left:3px solid var(--primary);
  background:#fff;border-radius:14px;padding:28px 30px;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s ease;
}
.service-unit:hover{box-shadow:var(--shadow-lg)}
.service-kit{color:var(--primary);font-size:13px;font-weight:700;letter-spacing:.4px}
.service-unit h3{font-size:19px;margin:10px 0 10px;font-weight:700}
.service-unit p{font-size:14px;color:var(--muted);margin-bottom:16px}
.service-unit a{font-size:14px;color:var(--primary);font-weight:600;display:inline-flex;gap:6px;align-items:center}
.service-unit a:hover{color:var(--primary-dark)}

/* ===== 动态提醒 ===== */
.tip-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.tip-card{
  background:#fff;border:1px solid var(--page-bg);
  border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;gap:12px;transition:box-shadow .25s ease;
}
.tip-card:hover{box-shadow:var(--shadow-lg)}
.tip-dot{
  width:8px;height:8px;border-radius:50%;background:var(--teal);
}
.tip-card h3{font-size:17px;font-weight:700}
.tip-card p{color:var(--muted);font-size:14px;flex:1}
.tip-date{font-size:13px;color:var(--disable);border-top:1px solid var(--line);padding-top:14px}

/* ===== FAQ ===== */
.faq-box{max-width:920px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line-strong);
  border-radius:var(--radius-md);margin-bottom:14px;
  overflow:hidden;transition:border-color .2s ease;
}
.faq-item[open]{border-color:rgba(36,92,223,.45);box-shadow:var(--shadow-sm)}
.faq-q{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 26px;font-size:17px;font-weight:600;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q .fa-plus{
  width:30px;height:30px;border-radius:50%;background:var(--primary-soft);
  color:var(--primary);display:flex;align-items:center;justify-content:center;
  font-size:13px;flex:0 0 30px;transition:transform .2s ease;
}
.faq-item[open] .fa-plus{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-a{padding:0 26px 24px 26px;color:var(--text2);font-size:15px;line-height:1.8;border-top:1px dashed var(--line);margin-top:0}
.faq-a div{padding-top:14px}

/* ===== 底部 CTA ===== */
.final-cta{
  padding:80px 0;
}
.cta-panel{
  background:linear-gradient(rgba(36,92,223,0.03),rgba(36,92,223,0.02)),url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  border:1px solid rgba(36,92,223,0.16);
  border-radius:22px;padding:56px 64px;text-align:center;
}
.cta-kicker{color:var(--primary);font-weight:600;letter-spacing:.3px;font-size:14px;margin-bottom:10px}
.cta-panel h2{font-size:30px;font-weight:700;line-height:1.4;margin-bottom:14px}
.cta-panel p{max-width:660px;margin:0 auto 30px;color:var(--text2);font-size:16px}
.cta-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== 页脚 ===== */
.site-footer{
  background:#F0F4F9;border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;
  padding:64px 0 50px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;color:var(--text);
  font-size:20px;font-weight:700;margin-bottom:16px;
}
.footer-about{color:var(--muted);font-size:14px;max-width:380px;line-height:1.8}
.footer-col h4{
  font-size:15px;font-weight:700;margin-bottom:18px;
  color:var(--text);
}
.footer-col ul li{margin-bottom:8px}
.footer-col ul a{
  color:var(--text2);font-size:14px;line-height:1.7;
  transition:color .2s ease;
}
.footer-col ul a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  text-align:center;color:var(--muted);font-size:13px;
  display:flex;justify-content:center;gap:28px;flex-wrap:wrap;background:#EBF0F7;
}

/* ===== 响应式 ===== */
@media (max-width: 1199px){
  .cat1-head h1{font-size:36px}
  .section{padding:80px 0}
}
@media (max-width: 991px){
  .main-nav{
    position:fixed;top:var(--nav-h);left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;gap:0;
    padding:12px 24px 20px;display:none;
    box-shadow:0 18px 30px rgba(34,60,103,0.12);
    border-bottom:1px solid var(--line);
  }
  .main-nav.open{display:flex}
  .nav-link{width:100%;padding:12px 0;border-bottom:1px solid var(--line-strong);min-height:52px}
  .nav-link:last-child{border-bottom:none}
  .nav-link.active::after{display:none}
  .nav-link.active{color:var(--primary)}
  .nav-toggle{display:inline-flex}
  .cat1-head-grid{grid-template-columns:1fr;gap:42px}
  .guide-intro{grid-template-columns:1fr;padding:32px;gap:32px}
  .guide-intro-visual img{aspect-ratio:16/9}
  .guard-feature,.guard-normal,.guard-mini{grid-column:span 6}
  .risk-grid{grid-template-columns:1fr;gap:40px}
  .flow-steps{grid-template-columns:1fr 1fr}
  .compare-wrap{grid-template-columns:1fr;gap:24px}
  .vs-middle{display:none}
  .service-rows{grid-template-columns:1fr}
  .tip-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width: 767px){
  .container{padding-left:20px;padding-right:20px}
  .brand{font-size:17px}
  .brand-mark{width:30px;height:30px;font-size:16px;flex-basis:30px}
  .section{padding:60px 0}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:28px}
  .section-head h2{font-size:24px}
  .cat1-head{padding:38px 0 44px}
  .cat1-head h1{font-size:29px}
  .lede{font-size:15px}
  .btn{min-height:44px;padding:0 22px}
  .guide-intro{padding:20px;border-radius:16px;gap:24px}
  .guide-intro-copy h3{font-size:21px}
  .guide-rule{font-size:14px;line-height:1.7}
  .guard-card{padding:24px}
  .guard-feature{padding:24px}
  .diff-check{grid-template-columns:1fr}
  .risk-row{grid-template-columns:36px 1fr;gap:14px}
  .risk-row strong{font-size:15px}
  .flow-steps{grid-template-columns:1fr}
  .flow-line{display:none}
  .compare-card{padding:28px 22px}
  .service-unit{padding:24px}
  .compare-after::after{top:18px;right:20px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px 20px 18px;font-size:14px}
  .final-cta{padding:56px 0}
  .cta-panel{padding:36px 22px;border-radius:16px}
  .cta-panel h2{font-size:23px}
  .cta-btns{flex-direction:column;align-items:center}
  .cta-btns .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding:50px 0}
  .footer-bottom{gap:8px 20px}
}

/* roulang page: category2 */
:root {
  --primary: #245CDF;
  --primary-hover: #1843B9;
  --primary-soft: #EAF0FB;
  --accent: #0B8F87;
  --warn: #EF9A3F;
  --page-bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --text-main: #1D2B45;
  --text-sub: #41536C;
  --text-weak: #6C7E95;
  --border-line: #DCE4EF;
  --white: #FFFFFF;
  --footer-bg: #F0F4F9;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 8px 24px rgba(34, 60, 103, 0.06);
  --shadow-hover: 0 16px 36px rgba(34, 60, 103, 0.10);
  --transition-fast: 0.2s ease;
  --header-height: 72px;
}
*,
*::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", "Arial", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background-color: var(--page-bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}
img {
  display: block;
  max-width: 100%;
}
button,
input,
textarea {
  font: inherit;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: none;
  border-bottom: 1px solid #E8EDF5;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text-main);
  white-space: nowrap;
}
.brand:hover {
  color: var(--primary);
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
}
.nav-link:hover {
  color: var(--text-main);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: translateX(-50%);
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-toggle:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
@media (max-width: 991px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    background: #fff;
    border-bottom: 1px solid #E8EDF5;
    gap: 4px;
    box-shadow: 0 18px 32px rgba(34, 60, 103, 0.08);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    justify-content: flex-start;
    padding: 0 8px;
    width: 100%;
    font-size: 17px;
  }
  .nav-link.active::after {
    left: 8px;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
    border-radius: 3px;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  background: linear-gradient(180deg, rgba(246, 248, 251, 0.96), rgba(234, 240, 251, 0.90)), url("/assets/images/backpic/back-2.webp") center / cover no-repeat;
  padding: 72px 0 60px;
}
.page-hero-inner {
  max-width: 860px;
}
.page-hero-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 13px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 500;
}
.tag-chip i {
  font-size: 12px;
}
.page-hero h1 {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
}
.page-hero .sub-title {
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  font-size: 14px;
  color: var(--text-weak);
}
.breadcrumb a {
  color: var(--text-weak);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb i {
  font-size: 12px;
  color: #a9b6c8;
}

/* ========== Docs Layout ========== */
.doc-section-space {
  padding: 80px 0 80px;
}
.doc-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 52px;
  align-items: start;
}
.toc-wrap {
  position: sticky;
  top: calc(var(--header-height) + 28px);
  background: var(--white);
  border: 1px solid #E3E9F2;
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  box-shadow: var(--shadow-card);
}
.toc-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}
.toc-title i {
  color: var(--primary);
  font-size: 15px;
}
.toc-list {
  list-style: none;
  padding: 0;
}
.toc-list li {
  border-top: 1px solid #EDF1F7;
}
.toc-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 11px 8px;
  font-size: 14px;
  color: var(--text-sub);
  border-radius: 6px;
}
.toc-list a i {
  font-size: 12px;
  opacity: 0.55;
  transition: opacity var(--transition-fast);
}
.toc-list a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.toc-list a:hover i {
  opacity: 1;
}
.doc-main {
  min-width: 0;
}
.doc-section {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid #E3E9F2;
  box-shadow: var(--shadow-card);
}
.doc-section:last-child {
  margin-bottom: 0;
}
.doc-section h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.doc-section h2::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: var(--primary);
}
.doc-section .lead {
  color: var(--text-sub);
  margin-bottom: 20px;
  font-size: 16px;
}
.rich-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.rich-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-main);
}
.rich-list li i {
  margin-top: 6px;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #fff;
  background: var(--primary);
  border-radius: 50%;
}
.rich-list li strong {
  font-weight: 600;
  color: var(--text-main);
}
.info-strip {
  display: flex;
  gap: 14px;
  background: #F4F7FC;
  border: 1px solid #E8EDF5;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin-top: 22px;
}
.info-strip i {
  font-size: 20px;
  color: var(--warn);
  margin-top: 2px;
}
.info-strip p {
  font-size: 14px;
  color: var(--text-sub);
}
.step-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: step;
}
.step-list li {
  position: relative;
  display: flex;
  gap: 16px;
  padding-left: 0;
}
.step-list li::before {
  content: counter(step);
  counter-increment: step;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
}
.step-list li p {
  padding-top: 3px;
  color: var(--text-sub);
  line-height: 1.8;
}
.step-list li strong {
  display: block;
  font-size: 16px;
  color: var(--text-main);
  font-weight: 600;
}
.content-img-block {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 24px;
  border: 1px solid #E7EDF5;
}
.content-img-block img {
  width: 100%;
  object-fit: cover;
}
.content-img-block figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-weak);
  background: #fafbfd;
}
.check-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-sub);
}
.check-list li i {
  margin-top: 4px;
  color: var(--accent);
  font-size: 15px;
  width: 20px;
  flex: 0 0 20px;
  text-align: center;
}
.check-list.warn-list li i {
  color: var(--warn);
}
.related-block {
  background: var(--primary-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-top: 24px;
}
.related-block p {
  font-size: 15px;
  color: var(--text-main);
}
.related-block a {
  color: var(--primary);
  font-weight: 600;
}
.related-block a:hover {
  color: var(--primary-hover);
}

/* ========== FAQ ========== */
.faq-section-wrap {
  background: var(--white);
  border-top: 1px solid #E8EDF5;
  border-bottom: 1px solid #E8EDF5;
  padding: 80px 0;
}
.faq-inner {
  max-width: 920px;
  margin: 0 auto;
}
.section-heading {
  margin-bottom: 34px;
}
.section-heading .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-heading .eyebrow i {
  font-size: 13px;
}
.section-heading h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}
.section-heading p {
  margin-top: 10px;
  color: var(--text-sub);
  max-width: 760px;
}
.faq-list {
  border-top: 1px solid #DCE4EF;
}
.faq-item {
  border-bottom: 1px solid #DCE4EF;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 6px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  gap: 16px;
  line-height: 1.6;
  transition: color var(--transition-fast);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-question .faq-icon {
  position: relative;
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border: 1px solid #C9D5E5;
  border-radius: 50%;
  background: #fbfcfe;
}
.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--text-sub);
  transform: translate(-50%, -50%);
  border-radius: 2px;
  transition: background var(--transition-fast);
}
.faq-question .faq-icon::before {
  width: 10px;
  height: 1.5px;
}
.faq-question .faq-icon::after {
  width: 1.5px;
  height: 10px;
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.faq-item.open .faq-question {
  color: var(--primary);
}
.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: var(--primary);
}
.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-answer {
  display: none;
  padding: 0 30px 24px 6px;
}
.faq-item.open .faq-answer {
  display: block;
}
.faq-answer p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-sub);
}

/* ========== CTA ========== */
.cta-banner {
  padding: 80px 0 88px;
}
.cta-card {
  position: relative;
  background: var(--white);
  border: 1px solid #E3E9F2;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  padding: 46px;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.cta-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}
.cta-card h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 10px;
}
.cta-card p {
  color: var(--text-sub);
  max-width: 680px;
  font-size: 15px;
}
.btn-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
  flex: 0 0 auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 18px rgba(36, 92, 223, 0.20);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 12px 24px rgba(24, 67, 185, 0.24);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  opacity: 0.92;
}
.btn-outline {
  background: #fff;
  border-color: #C9D5E5;
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn:focus-visible,
.faq-question:focus-visible,
.nav-link:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid rgba(36, 92, 223, 0.5);
  outline-offset: 2px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--footer-bg);
  border-top: 1px solid #E0E8F2;
  padding-top: 52px;
  font-size: 14px;
  color: var(--text-sub);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}
.footer-brand .brand-mark {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  font-size: 16px;
}
.footer-about {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.9;
  max-width: 380px;
  color: var(--text-weak);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}
.footer-col a {
  color: var(--text-sub);
  font-size: 14px;
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid #D9E2EE;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-weak);
  text-align: center;
  background: #EDF2F8;
}
.footer-bottom span {
  display: block;
}

/* ========== Responsive ========== */
@media (max-width: 1200px) {
  .doc-layout {
    gap: 36px;
  }
}
@media (max-width: 991px) {
  .page-hero {
    padding: 56px 0 48px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .doc-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .toc-wrap {
    position: static;
    padding: 18px;
  }
  .toc-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }
  .toc-list li {
    border-top: none;
  }
  .toc-list a {
    padding: 8px 12px;
    border-radius: 6px;
    background: #F4F7FC;
  }
  .cta-grid {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .sub-title {
    font-size: 16px;
  }
  .doc-section-space {
    padding: 56px 0;
  }
  .faq-section-wrap {
    padding: 56px 0;
  }
  .cta-banner {
    padding: 56px 0 64px;
  }
  .cta-card {
    padding: 28px 22px;
  }
  .doc-section {
    padding: 22px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-heading h2 {
    font-size: 26px;
  }
  .faq-question {
    font-size: 15px;
  }
  .faq-question .faq-icon {
    flex: 0 0 26px;
    width: 26px;
    height: 26px;
  }
  .cta-card h2 {
    font-size: 22px;
  }
}
@media (max-width: 520px) {
  .page-hero {
    padding: 44px 0 40px;
  }
  .page-hero h1 {
    font-size: 25px;
  }
  .page-hero .sub-title {
    font-size: 15px;
  }
  .brand {
    font-size: 18px;
    gap: 8px;
  }
  .brand-mark {
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    font-size: 15px;
  }
  .doc-section h2 {
    font-size: 20px;
  }
  .step-list li {
    gap: 12px;
  }
  .step-list li::before {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    font-size: 14px;
  }
  .info-strip {
    padding: 14px;
  }
  .faq-answer {
    padding: 0 14px 20px 0;
  }
  .cta-card p {
    font-size: 14px;
  }
}