/* roulang page: index */
:root {
  --primary: #1B6CA8;
  --primary-dark: #145A8C;
  --deep: #0E3B5C;
  --bg: #F5F8FB;
  --white: #FFFFFF;
  --accent: #E58E2E;
  --accent-dark: #C97A24;
  --success: #3C7A6E;
  --text: #1E2A33;
  --text-secondary: #5B6B7A;
  --text-muted: #8A9AA8;
  --border: #E2EAF2;
  --radius: 12px;
  --radius-btn: 8px;
  --radius-pill: 999px;
  --shadow: 0 4px 16px rgba(28, 45, 72, .08);
  --shadow-hover: 0 8px 24px rgba(28, 45, 72, .12);
  --transition: .2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===== 按钮 ===== */
.btn {
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-btn);
  padding: 10px 22px;
  transition: all var(--transition);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-sm {
  padding: 7px 16px;
  font-size: 14px;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 16px;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

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

.btn-accent:hover,
.btn-accent:focus {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: #fff;
  border: 1px solid rgba(27, 108, 168, .3);
  color: var(--primary);
}

.btn-outline:hover {
  background: rgba(27, 108, 168, .08);
  border-color: var(--primary);
  color: var(--primary);
}

.btn:focus-visible {
  outline: 3px solid rgba(27, 108, 168, .35);
  outline-offset: 2px;
}

/* ===== 顶部标题标签 ===== */
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(27, 108, 168, .08);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  margin-bottom: 12px;
  letter-spacing: .02em;
}

.section-heading h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--deep);
  margin: 0;
}

.section-heading p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 10px 0 0;
}

/* ===== 顶部双层导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 1px 0 rgba(28, 45, 72, .06);
}

.header-main {
  border-bottom: 1px solid rgba(226, 234, 242, .7);
  padding: 14px 0;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--deep);
  letter-spacing: .01em;
  white-space: nowrap;
}

.brand-logo:hover {
  color: var(--deep);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.header-search {
  position: relative;
  max-width: 320px;
  width: 100%;
}

.header-search input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0 44px 0 16px;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(27, 108, 168, .1);
  background: #fff;
}

.header-search button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), background var(--transition);
}

.header-search button:hover {
  color: var(--primary);
  background: rgba(27, 108, 168, .08);
}

.btn-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: #fff;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}

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

.channel-nav-wrap {
  background: #fff;
}

.channel-nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0 0 2px;
}

.channel-nav::-webkit-scrollbar {
  display: none;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px 8px 0 0;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.channel-link:hover {
  color: var(--primary);
  background: rgba(27, 108, 168, .04);
}

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

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 72px 0 64px;
  background: linear-gradient(135deg, #F0F6FB 0%, #E8F0F7 55%, #DEEAF2 100%);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: rgba(27, 108, 168, .05);
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 20%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(229, 142, 46, .04);
  pointer-events: none;
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 520px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid rgba(27, 108, 168, .12);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.hero-badge i {
  font-size: 12px;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--deep);
  margin: 0 0 16px;
  letter-spacing: .01em;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.hero-visual img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.hero-float-card {
  position: absolute;
  left: 16px;
  bottom: 16px;
  background: rgba(255, 255, 255, .95);
  border-radius: 12px;
  padding: 14px 18px;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(4px);
}

.hero-float-card .float-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--success);
  line-height: 1;
}

.hero-float-card .float-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* ===== Stats 条 ===== */
.stats-section {
  padding: 28px 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 8px 12px;
}

.stat-num {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ===== Steps ===== */
.steps-section {
  padding: 80px 0;
  background: var(--bg);
}

.steps-head {
  text-align: center;
  margin-bottom: 48px;
}

.steps-head h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--deep);
  margin: 0;
}

.steps-head p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 10px 0 0;
}

.steps-row {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.steps-row::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 15%;
  right: 15%;
  height: 1px;
  border-top: 2px dashed rgba(27, 108, 168, .2);
  transform: translateY(-50%);
  z-index: 0;
}

.step-item {
  position: relative;
  z-index: 1;
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px 28px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.step-num {
  font-size: 42px;
  font-weight: 800;
  color: rgba(27, 108, 168, .16);
  line-height: 1;
  display: block;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.step-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(27, 108, 168, .08);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
}

.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--deep);
  margin: 0 0 8px;
}

.step-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* ===== Cases ===== */
.cases-section {
  padding: 80px 0;
  background: #fff;
}

.cases-head {
  text-align: center;
  margin-bottom: 48px;
}

.cases-head h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--deep);
  margin: 0;
}

.cases-head p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 10px 0 0;
}

.case-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(226, 234, 242, .5);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
}

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

.case-card-main .case-cover {
  height: 220px;
}

.case-cover {
  position: relative;
  overflow: hidden;
}

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

.case-card-sm .case-cover {
  height: 120px;
}

.case-tag {
  position: absolute;
  left: 14px;
  top: 14px;
  background: rgba(255, 255, 255, .92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  box-shadow: var(--shadow);
}

.case-body {
  padding: 20px 20px 22px;
}

.case-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--deep);
  margin: 0 0 6px;
}

.case-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

.case-metrics {
  display: flex;
  gap: 28px;
  margin-top: 16px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--success);
  line-height: 1.2;
}

.metric-item span:last-child {
  font-size: 13px;
  color: var(--text-muted);
}

.case-card-sm .case-body h3 {
  font-size: 15px;
}

/* ===== Why ===== */
.why-section {
  padding: 80px 0;
  background: var(--bg);
}

.why-visual {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.why-visual img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.why-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
}

.why-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.why-item i {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 12px;
  display: block;
}

.why-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--deep);
  margin: 0 0 6px;
}

.why-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: #fff;
}

.faq-head {
  text-align: center;
  margin-bottom: 44px;
}

.faq-head h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--deep);
  margin: 0;
}

.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
}

.faq-accordion .accordion-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  overflow: hidden;
  background: #fff;
}

.faq-accordion .accordion-button {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  padding: 18px 20px;
  background: #fff;
  box-shadow: none;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-accordion .accordion-button::after {
  display: none;
}

.faq-accordion .accordion-button::before {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(27, 108, 168, .08);
  transition: transform var(--transition);
}

.faq-accordion .accordion-button[aria-expanded="true"] {
  color: var(--primary);
  font-weight: 600;
  background: rgba(27, 108, 168, .02);
}

.faq-accordion .accordion-button[aria-expanded="true"]::before {
  content: '−';
  background: rgba(27, 108, 168, .12);
}

.faq-accordion .accordion-button:focus {
  box-shadow: none;
  border-color: var(--primary);
}

.faq-accordion .accordion-body {
  padding: 0 20px 20px 56px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== CTA / Form ===== */
.cta-section {
  padding: 80px 0;
  background: var(--deep);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .04);
}

.cta-card {
  background: rgba(255, 255, 255, .04);
  border-radius: 16px;
  padding: 44px;
  border: 1px solid rgba(255, 255, 255, .08);
  position: relative;
  z-index: 1;
}

.cta-card h2 {
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 12px;
}

.cta-card > .row > .col-lg-6 > p {
  color: rgba(255, 255, 255, .7);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.cta-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
}

.cta-points li {
  color: rgba(255, 255, 255, .85);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cta-points i {
  color: var(--accent);
  font-size: 13px;
}

.cta-form {
  background: #fff;
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-hover);
}

.cta-form .form-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.cta-form .form-control {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 15px;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.cta-form .form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(27, 108, 168, .1);
  background: #fff;
}

.cta-form .form-control::placeholder {
  color: var(--text-muted);
}

.form-privacy {
  font-size: 13px;
  color: var(--text-muted);
  margin: 8px 0 0;
  text-align: center;
}

/* ===== News / CMS ===== */
.news-section {
  padding: 80px 0;
  background: var(--bg);
}

.news-heading h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--deep);
  margin: 0 0 12px;
}

.news-heading p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 20px;
}

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

.news-item {
  display: block;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 22px;
  border: 1px solid rgba(226, 234, 242, .5);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.news-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(27, 108, 168, .2);
}

.news-cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(27, 108, 168, .08);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  margin-bottom: 8px;
}

.news-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--deep);
  margin-bottom: 4px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-desc {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 8px;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.news-more {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.news-more i {
  font-size: 11px;
  transition: transform var(--transition);
}

.news-item:hover .news-more i {
  transform: translateX(3px);
}

.news-empty {
  background: #fff;
  border-radius: var(--radius);
  padding: 48px 20px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  font-size: 15px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--deep);
  color: rgba(255, 255, 255, .7);
  padding: 56px 0 20px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}

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

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .6);
  max-width: 280px;
  margin-bottom: 0;
}

.site-footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 16px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, .6);
}

.footer-contact i {
  color: rgba(255, 255, 255, .4);
  width: 16px;
  text-align: center;
}

.footer-note {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .45);
  margin-bottom: 0;
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, .4);
  margin: 0;
}

.footer-domain {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .hero-content h1 {
    font-size: 30px;
  }

  .hero-visual img {
    height: 300px;
  }

  .hero-section {
    padding: 56px 0 48px;
  }

  .hero-visual {
    margin-top: 32px;
  }

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

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

  .steps-row::before {
    display: none;
  }

  .cta-card {
    padding: 28px 24px;
  }

  .cta-points {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .header-main {
    padding: 10px 0;
  }

  .brand-logo {
    font-size: 19px;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 15px;
  }

  .hero-section {
    padding: 40px 0 44px;
  }

  .hero-content h1 {
    font-size: 26px;
  }

  .hero-sub {
    font-size: 15px;
  }

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

  .hero-visual img {
    height: 220px;
  }

  .hero-float-card {
    left: 12px;
    bottom: 12px;
    padding: 10px 14px;
  }

  .hero-float-card .float-num {
    font-size: 22px;
  }

  .stats-section {
    padding: 20px 0;
  }

  .stat-num {
    font-size: 26px;
  }

  .steps-section,
  .cases-section,
  .why-section,
  .faq-section,
  .cta-section,
  .news-section {
    padding: 48px 0;
  }

  .section-heading h2,
  .steps-head h2,
  .cases-head h2,
  .faq-head h2 {
    font-size: 24px;
  }

  .step-item {
    padding: 24px 20px;
  }

  .why-visual img {
    height: 240px;
  }

  .why-item {
    padding: 18px 16px;
  }

  .cta-card {
    padding: 20px 16px;
  }

  .cta-form {
    padding: 20px 16px;
  }

  .news-item {
    padding: 16px;
  }

  .news-title {
    font-size: 15px;
  }

  .site-footer {
    padding: 40px 0 16px;
  }

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

@media (max-width: 520px) {
  .brand-logo {
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-item {
    padding: 6px;
  }

  .stat-num {
    font-size: 22px;
  }

  .case-metrics {
    flex-direction: column;
    gap: 10px;
  }

  .cta-points {
    grid-template-columns: 1fr;
  }

  .footer-contact {
    gap: 6px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #1B6CA8;
            --primary-dark: #145580;
            --secondary: #0E3B5C;
            --accent: #E58E2E;
            --accent-dark: #c97a24;
            --bg: #F5F8FB;
            --white: #FFFFFF;
            --text: #1E2A33;
            --text-muted: #5B6B7A;
            --text-weak: #8A9AA8;
            --line: #E2EAF2;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow: 0 4px 16px rgba(28, 45, 72, .08);
            --shadow-hover: 0 10px 24px rgba(28, 45, 72, .12);
            --transition: all .25s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1200px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button, input, textarea {
            font-family: inherit;
        }
        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            background: var(--white);
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 2px 12px rgba(28, 45, 72, .06);
        }
        .header-main {
            padding: 12px 0;
            border-bottom: 1px solid var(--line);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            color: var(--text);
        }
        .brand-logo:hover {
            text-decoration: none;
            color: var(--text);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: var(--white);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: 0 4px 10px rgba(27, 108, 168, .2);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .5px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            padding: 4px 4px 4px 16px;
            width: 100%;
            max-width: 360px;
            transition: var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            background: var(--white);
            box-shadow: 0 0 0 3px rgba(27, 108, 168, .12);
        }
        .header-search input {
            border: none;
            outline: none;
            background: transparent;
            flex: 1;
            font-size: 14px;
            color: var(--text);
            min-width: 0;
        }
        .header-search input::placeholder {
            color: var(--text-weak);
        }
        .header-search button {
            background: var(--primary);
            color: var(--white);
            border: none;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .header-search button:hover {
            background: var(--primary-dark);
        }
        .btn-icon {
            background: none;
            border: 1px solid var(--line);
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-icon:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--bg);
        }
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 500;
            transition: var(--transition);
            font-size: 15px;
            padding: 8px 18px;
            border: none;
        }
        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            border: none;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: var(--white);
            transform: translateY(-1px);
            box-shadow: 0 6px 14px rgba(27, 108, 168, .22);
        }
        .btn-accent {
            background-color: var(--accent);
            color: var(--white);
            border: none;
        }
        .btn-accent:hover {
            background-color: var(--accent-dark);
            color: var(--white);
            transform: translateY(-1px);
            box-shadow: 0 6px 14px rgba(229, 142, 46, .25);
        }
        .btn-outline-primary {
            background: var(--white);
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: rgba(27, 108, 168, .06);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .btn-lg {
            padding: 12px 28px;
            font-size: 16px;
        }

        .channel-nav-wrap {
            background: var(--white);
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            text-decoration: none;
            transition: var(--transition);
        }
        .channel-link:hover {
            color: var(--primary);
            background: rgba(27, 108, 168, .07);
            text-decoration: none;
        }
        .channel-link.active {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(27, 108, 168, .2);
        }

        .category-hero {
            background: linear-gradient(135deg, #E9F1F8 0%, #F7FAFD 100%);
            padding: 64px 0;
            border-bottom: 1px solid var(--line);
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, .92);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
            padding: 0;
            background: transparent;
        }
        .breadcrumb a {
            color: var(--text-weak);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-weak);
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            margin: 0 0 14px;
            color: var(--text);
            line-height: 1.35;
        }
        .category-hero h1 .highlight {
            color: var(--primary);
        }
        .category-hero .lead {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 760px;
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .hero-badges .badge {
            background: var(--white);
            border: 1px solid var(--line);
            color: var(--text-muted);
            font-weight: 500;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: none;
        }
        .hero-badges .badge i {
            color: var(--primary);
        }

        .page-main {
            padding: 80px 28px;
        }
        .section-wrapper {
            margin-bottom: 72px;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 40px;
            gap: 24px;
            flex-wrap: wrap;
        }
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text);
        }
        .section-header .sub {
            font-size: 15px;
            color: var(--text-weak);
            margin: 0;
        }
        .section-title-line {
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin-top: 10px;
        }

        .service-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 30px 26px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border: 1px solid rgba(226, 234, 242, .5);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(27, 108, 168, .08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .service-card:hover .icon-wrap {
            background: var(--primary);
            color: var(--white);
        }
        .service-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text);
        }
        .service-card p {
            font-size: 14.5px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.65;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .service-tags .badge {
            background: var(--bg);
            color: var(--text-muted);
            font-weight: 400;
            font-size: 12.5px;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
        }

        .feature-grid {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .feature-item {
            display: flex;
            gap: 20px;
            background: var(--white);
            border-radius: var(--radius);
            padding: 28px 30px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 234, 242, .4);
            transition: var(--transition);
        }
        .feature-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .feature-num {
            font-size: 32px;
            font-weight: 700;
            color: rgba(27, 108, 168, .2);
            line-height: 1;
            min-width: 56px;
            text-align: center;
        }
        .feature-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .feature-content p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .scene-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border: none;
        }
        .scene-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .scene-card .img-wrap {
            overflow: hidden;
            position: relative;
        }
        .scene-card .img-wrap img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .scene-card:hover .img-wrap img {
            transform: scale(1.05);
        }
        .scene-card .img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(14, 59, 92, .6));
        }
        .scene-card .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-size: 13px;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }
        .scene-card .body {
            padding: 24px;
        }
        .scene-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .scene-card .metric-row {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            padding-top: 14px;
            border-top: 1px solid var(--line);
        }
        .metric-item .value {
            font-size: 22px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        .metric-item .label {
            font-size: 13px;
            color: var(--text-weak);
        }

        .process-wrap {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 36px;
        }
        .process-step {
            display: flex;
            gap: 20px;
            position: relative;
            align-items: flex-start;
        }
        .process-step:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 27px;
            top: 68px;
            bottom: -12px;
            width: 2px;
            background: var(--line);
        }
        .step-dot {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(27, 108, 168, .08);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 20px;
            flex-shrink: 0;
            z-index: 2;
            background: var(--white);
        }
        .step-box {
            flex: 1;
            padding-bottom: 28px;
        }
        .step-box h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }
        .step-box p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.65;
        }

        .faq-card {
            border: none;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 14px;
            overflow: hidden;
        }
        .faq-card .accordion-button {
            background: var(--white);
            color: var(--text);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            gap: 12px;
        }
        .faq-card .accordion-button:not(.collapsed) {
            background: rgba(27, 108, 168, .04);
            color: var(--primary);
        }
        .faq-card .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B6CA8' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-card .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B6CA8' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
        }
        .faq-card .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.75;
            background: rgba(27, 108, 168, .02);
            border-top: 1px solid rgba(226, 234, 242, .4);
        }

        .cta-banner {
            background: var(--secondary);
            border-radius: var(--radius);
            padding: 48px;
            color: var(--white);
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
        }
        .cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-banner p {
            color: rgba(255, 255, 255, .8);
            font-size: 16px;
            margin-bottom: 0;
            max-width: 560px;
        }

        .contact-form-card {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-hover);
            padding: 36px;
            margin-top: -40px;
            position: relative;
            z-index: 3;
        }
        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }
        .form-control {
            border-radius: var(--radius-sm);
            border: 1px solid var(--line);
            padding: 10px 14px;
            font-size: 15px;
            color: var(--text);
            transition: var(--transition);
            background: var(--white);
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 108, 168, .12);
        }
        .form-control::placeholder {
            color: var(--text-weak);
        }
        textarea.form-control {
            min-height: 90px;
        }
        .form-note {
            font-size: 13px;
            color: var(--text-weak);
            margin-top: 10px;
        }

        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, .75);
            padding: 48px 0 0;
            margin-top: 60px;
        }
        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--white);
            font-size: 18px;
            font-weight: 700;
            text-decoration: none;
            margin-bottom: 14px;
        }
        .footer-brand:hover {
            color: var(--white);
            text-decoration: none;
        }
        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, .12);
            color: var(--white);
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .site-footer h4 {
            color: var(--white);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--white);
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 10px;
            color: rgba(255, 255, 255, .65);
        }
        .footer-contact li i {
            color: var(--accent);
            width: 16px;
        }
        .footer-note {
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 18px 0;
            margin-top: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, .55);
            font-size: 13px;
            margin: 0;
        }
        .footer-domain {
            font-family: 'SF Mono', 'Consolas', monospace;
            font-size: 13px;
            letter-spacing: .5px;
        }

        @media (max-width: 1024px) {
            .feature-item {
                flex-direction: column;
                gap: 12px;
            }
            .feature-num {
                text-align: left;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 40px 0;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .lead {
                font-size: 15px;
            }
            .page-main {
                padding: 48px 20px;
            }
            .section-wrapper {
                margin-bottom: 56px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .cta-banner {
                padding: 32px 24px;
            }
            .contact-form-card {
                padding: 24px;
                margin-top: -20px;
            }
            .process-wrap {
                padding: 24px 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .header-actions .btn-sm {
                padding: 6px 12px;
                font-size: 14px;
            }
        }
        @media (max-width: 520px) {
            .brand-text {
                font-size: 17px;
            }
            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .channel-link {
                padding: 6px 12px;
                font-size: 14px;
            }
            .service-card {
                padding: 22px 18px;
            }
            .scene-card .img-wrap img {
                height: 160px;
            }
            .btn-lg {
                padding: 10px 20px;
                font-size: 15px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1B6CA8;
            --primary-dark: #155a8a;
            --primary-light: rgba(27, 108, 168, .08);
            --secondary: #0E3B5C;
            --accent: #E58E2E;
            --accent-dark: #cc7a1f;
            --success: #3C7A6E;
            --bg: #F5F8FB;
            --white: #FFFFFF;
            --text: #1E2A33;
            --text-secondary: #5B6B7A;
            --text-muted: #8A9AA8;
            --border: #E2EAF2;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-pill: 999px;
            --shadow: 0 4px 16px rgba(28, 45, 72, .08);
            --shadow-hover: 0 8px 24px rgba(28, 45, 72, .12);
            --transition: .2s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 按钮 */
        .btn {
            --bs-btn-font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .btn-primary {
            --bs-btn-bg: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            --bs-btn-active-bg: var(--primary-dark);
            --bs-btn-active-border-color: var(--primary-dark);
            box-shadow: 0 2px 8px rgba(27, 108, 168, .18);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(27, 108, 168, .24);
        }

        .btn-accent {
            --bs-btn-bg: var(--accent);
            --bs-btn-border-color: var(--accent);
            --bs-btn-hover-bg: var(--accent-dark);
            --bs-btn-hover-border-color: var(--accent-dark);
            --bs-btn-active-bg: var(--accent-dark);
            --bs-btn-active-border-color: var(--accent-dark);
            color: #fff;
            box-shadow: 0 2px 10px rgba(229, 142, 46, .22);
        }

        .btn-accent:hover {
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(229, 142, 46, .3);
        }

        .btn-outline-primary {
            --bs-btn-color: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-light);
            --bs-btn-hover-color: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            background: #fff;
        }

        .btn-outline-primary:hover {
            transform: translateY(-1px);
        }

        /* Header */
        .site-header {
            background: var(--white);
            box-shadow: 0 1px 0 var(--border), var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-main {
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            background: var(--white);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            font-size: 22px;
            font-weight: 700;
            letter-spacing: .5px;
        }

        .brand-logo:hover {
            color: var(--text);
            text-decoration: none;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 10px;
            font-size: 15px;
            box-shadow: 0 2px 8px rgba(27, 108, 168, .22);
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 4px 6px 4px 16px;
            width: 320px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 108, 168, .12);
            background: #fff;
        }

        .header-search input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--text);
            min-width: 0;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search button {
            width: 34px;
            height: 34px;
            border: none;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            cursor: pointer;
            transition: background var(--transition);
        }

        .header-search button:hover {
            background: var(--primary-dark);
        }

        .header-actions .btn-icon {
            width: 38px;
            height: 38px;
            border: 1px solid var(--border);
            background: #fff;
            border-radius: 50%;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .header-actions .btn-icon:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .header-actions .btn-sm {
            padding: 8px 20px;
            border-radius: var(--radius-pill);
            font-size: 14px;
        }

        /* 频道导航 */
        .channel-nav-wrap {
            background: var(--white);
            border-bottom: 1px solid var(--border);
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            white-space: nowrap;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: all var(--transition);
        }

        .channel-link i {
            font-size: 13px;
        }

        .channel-link:hover {
            color: var(--primary);
            background: var(--primary-light);
            text-decoration: none;
        }

        .channel-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(27, 108, 168, .22);
        }

        /* 面包屑 */
        .breadcrumb-area {
            background: var(--bg);
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb-area .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 14px;
            color: var(--text-muted);
        }

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

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

        .breadcrumb-area .breadcrumb .active {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
        }

        /* 文章主区 */
        .article-page {
            padding: 40px 0 72px;
        }

        .article-main {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            box-shadow: var(--shadow);
        }

        .article-main h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 28px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .article-meta .badge {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            border-radius: var(--radius-pill);
            padding: 5px 14px;
        }

        .article-meta .article-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .article-cat {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
        }

        /* 正文排版 */
        .article-content {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            word-wrap: break-word;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text);
            margin: 40px 0 14px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 12px;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 6px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 14px 22px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            color: var(--text-secondary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 16px;
            text-align: left;
        }

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

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 8px 0;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
        }

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

        .article-content strong {
            font-weight: 600;
        }

        /* 正文底部导航 */
        .article-footer-nav {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .article-footer-nav .nav-link-btn {
            padding: 8px 20px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-size: 14px;
            background: #fff;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-footer-nav .nav-link-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            text-decoration: none;
        }

        /* 未找到 */
        .not-found-box {
            text-align: center;
            padding: 48px 24px;
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
        }

        .not-found-box i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .not-found-box h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }

        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* 侧边栏 */
        .sidebar-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 26px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            margin-bottom: 18px;
            position: relative;
        }

        .sidebar-card h3::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--accent);
        }

        .sidebar-about p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-list li {
            margin-bottom: 12px;
        }

        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 9px 14px;
            border-radius: var(--radius-md);
            background: var(--bg);
            transition: all var(--transition);
        }

        .sidebar-list a:hover {
            color: var(--primary);
            background: var(--primary-light);
            text-decoration: none;
        }

        .sidebar-list a i {
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            border-radius: var(--radius-md);
            color: var(--primary);
            font-size: 13px;
            box-shadow: 0 1px 3px rgba(28, 45, 72, .06);
        }

        .sidebar-contact-card {
            background: linear-gradient(160deg, var(--secondary), #164d68);
            border: none;
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }

        .sidebar-contact-card h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, .2);
        }

        .sidebar-contact-card h3::after {
            background: var(--accent);
        }

        .sidebar-contact-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 20px;
        }

        .sidebar-contact-card .btn {
            font-size: 14px;
        }

        /* 相关推荐 */
        .related-section {
            padding: 24px 0 0;
        }

        .related-section .section-title {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-section .section-title::before {
            content: '';
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: var(--radius-pill);
            display: inline-block;
        }

        .related-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            display: block;
            transition: all var(--transition);
            height: 100%;
            border: 1px solid transparent;
        }

        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            text-decoration: none;
            border-color: var(--border);
        }

        .related-card__img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            display: block;
        }

        .related-card__body {
            padding: 20px;
        }

        .related-card__tag {
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 10px;
        }

        .related-card__title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card__desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card__link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-card__link i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .related-card:hover .related-card__link i {
            transform: translateX(3px);
        }

        /* 轻量 CTA */
        .article-cta {
            margin-top: 40px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            background: linear-gradient(120deg, var(--secondary), #1d5675);
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            color: #fff;
        }

        .article-cta__title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .article-cta__desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            max-width: 480px;
        }

        .article-cta .btn-accent {
            padding: 12px 30px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, .75);
            padding: 56px 0 0;
            margin-top: 40px;
        }

        .site-footer .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 300px;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
            border-radius: var(--radius-pill);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 5px;
            text-decoration: none;
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact li {
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact li i {
            color: var(--accent);
        }

        .footer-note {
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0 24px;
            margin-top: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 14px;
            color: rgba(255, 255, 255, .45);
        }

        .footer-domain {
            letter-spacing: .5px;
        }

        /* 响应式 */
        @media (max-width: 992px) {
            .article-main {
                padding: 32px;
            }
            .article-main h1 {
                font-size: 28px;
            }
            .article-content h2 {
                font-size: 22px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .article-page {
                padding: 28px 0 56px;
            }
            .article-cta {
                padding: 30px;
            }
        }

        @media (max-width: 768px) {
            .header-main {
                padding: 10px 0;
            }
            .brand-logo {
                font-size: 19px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
            .article-main {
                padding: 24px 20px;
                border-radius: var(--radius-md);
            }
            .article-main h1 {
                font-size: 24px;
            }
            .article-meta {
                gap: 10px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-content h3 {
                font-size: 17px;
            }
            .article-cta {
                flex-direction: column;
                text-align: center;
                padding: 28px 24px;
            }
            .article-cta__desc {
                max-width: 100%;
            }
            .sidebar-card {
                padding: 20px;
            }
            .related-card__img {
                height: 150px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-main h1 {
                font-size: 22px;
            }
            .article-meta {
                font-size: 13px;
            }
            .article-footer-nav {
                flex-direction: column;
                align-items: stretch;
            }
            .article-footer-nav .nav-link-btn {
                width: 100%;
                justify-content: center;
            }
            .related-card__img {
                height: 140px;
            }
            .site-footer {
                padding-top: 40px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 768px) {
            .article-content table {
                display: block;
                overflow-x: auto;
                white-space: nowrap;
                -webkit-overflow-scrolling: touch;
            }
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }