/* roulang page: index */
:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --primary-light: #EFF6FF;
  --accent: #F97316;
  --accent-dark: #EA580C;
  --bg-body: #F5F9FC;
  --bg-card: #FFFFFF;
  --bg-alt: #F8FAFC;
  --text-main: #0F172A;
  --text-body: #334155;
  --text-weak: #8792A2;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --border-dark: #334155;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --shadow-sm: 0 4px 20px rgba(37, 99, 235, 0.06);
  --shadow-hover: 0 8px 30px rgba(37, 99, 235, 0.14);
  --shadow-form: 0 12px 40px rgba(15, 23, 42, 0.08);
  --space-section: 96px;
  --space-section-mobile: 64px;
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.2s; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; }

.content-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 左侧竖向导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 1050;
  padding: 28px 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px 28px;
  border-bottom: 1px solid var(--border-color);
}
.brand-logo {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  flex-shrink: 0;
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 1px;
}
.side-menu {
  flex: 1;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-body);
  font-size: 15px;
  font-weight: 600;
  position: relative;
  transition: all 0.22s;
}
.nav-item i { font-size: 18px; }
.nav-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}
.side-contact {
  margin: 0 16px;
  padding: 20px 18px;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  text-align: center;
}
.side-contact-label {
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 4px;
}
.side-contact-phone {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}
.side-contact-tip {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}

/* ===== 移动端顶部导航 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1060;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  height: 64px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-header .brand {
  padding: 0;
  border-bottom: none;
}
.mobile-toggle {
  font-size: 28px;
  color: var(--text-main);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  transition: background 0.2s;
}
.mobile-toggle:hover { background: var(--bg-alt); }
.mobile-menu {
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  padding: 8px 16px 16px;
  display: none;
}
.mobile-menu.open { display: block; }
.mobile-menu-item {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}
.mobile-menu-item:last-child { border-bottom: none; }
.mobile-menu-item:hover { background: var(--primary-light); color: var(--primary); }
.mobile-menu-item.active { color: var(--primary); font-weight: 700; }

/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: 240px;
  min-height: 100vh;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 540px;
  display: flex;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  z-index: 0;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #F5F9FC 0%, rgba(245, 249, 252, 0.75) 50%, transparent 90%);
  z-index: 1;
}
.hero-container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-main);
  max-width: 640px;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-body);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 700;
  border: 2px solid transparent;
  transition: all 0.22s;
  line-height: 1.5;
}
.btn-primary-custom {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary-custom:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
  color: #fff;
}
.btn-outline-custom {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline-custom:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== 指标看板 ===== */
.stats-section {
  padding: var(--space-section) 0;
  margin-top: -24px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px;
  text-align: center;
  height: 100%;
  transition: box-shadow 0.25s, transform 0.25s;
}
.stat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
}
.stat-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}
.stat-note {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 4px;
}

/* ===== 服务矩阵 ===== */
.services-section {
  padding: var(--space-section) 0;
  background: var(--bg-card);
}
.section-head {
  margin-bottom: 56px;
  max-width: 720px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.7;
}
.services-grid { align-items: flex-start; }
.services-grid .service-col:nth-child(n+4) {
  margin-top: 28px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  height: auto;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform 0.25s, box-shadow 0.25s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.service-card.featured {
  background: var(--primary-light);
  border-left: 4px solid var(--accent);
}
.service-icon {
  width: 46px;
  height: 46px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 22px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: background 0.25s, color 0.25s;
}
.service-card:hover .service-icon {
  background: var(--primary);
  color: #fff;
}
.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.service-card p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 16px;
}
.service-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s, color 0.2s;
}
.service-link:hover { color: var(--primary-dark); gap: 8px; }

/* ===== 结果对比 ===== */
.comparison-section {
  padding: var(--space-section) 0;
  background: var(--bg-alt);
}
.compare-card {
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  height: 100%;
}
.compare-card.traditional {
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
}
.compare-card.jiuyou {
  background: var(--primary-light);
  border: 1px solid #DBEAFE;
}
.compare-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  background: var(--bg-card);
  color: var(--text-body);
  border: 1px solid var(--border-color);
}
.compare-card.jiuyou .compare-tag {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.compare-card ul { padding: 0; }
.compare-card li {
  font-size: 15px;
  color: var(--text-body);
  padding: 8px 0 8px 24px;
  position: relative;
  line-height: 1.6;
}
.compare-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-light);
}
.compare-card.jiuyou li::before {
  background: var(--accent);
}
.summary-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  height: 100%;
  overflow: hidden;
}
.summary-cover {
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
}
.summary-cover img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s;
}
.summary-cover:hover img { transform: scale(1.02); }
.summary-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.summary-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 20px;
}
.summary-list {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}
.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-weak);
}
.summary-item strong {
  color: var(--text-main);
  font-size: 16px;
  font-weight: 700;
}

/* ===== 最新资讯 ===== */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg-card);
}
.news-list { max-width: 960px; }
.news-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 16px;
  transition: background 0.22s, box-shadow 0.22s, border-color 0.22s;
}
.news-card:hover {
  background: var(--bg-alt);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}
.news-card:hover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}
.news-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}
.news-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 8px;
}
.news-title a { transition: color 0.2s; }
.news-card:hover .news-title a { color: var(--primary); }
.news-summary {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.news-meta {
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  gap: 8px;
  align-items: center;
}
.news-more {
  position: absolute;
  right: 28px;
  bottom: 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}
.news-more:hover { color: var(--primary-dark); }
.news-empty {
  border: 1px dashed #CBD5E1;
  border-radius: 12px;
  padding: 60px 20px;
  text-align: center;
  color: var(--text-light);
  font-size: 15px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-alt);
}
.faq-intro .section-tag { margin-bottom: 14px; }
.faq-intro h2 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 16px;
}
.faq-intro p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-bottom: 14px;
  transition: all 0.3s;
  overflow: hidden;
}
.faq-item.active {
  background: var(--bg-alt);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.25s;
}
.faq-item.active .faq-question { color: var(--primary); }
.faq-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 400;
  color: var(--text-weak);
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  transition: transform 0.3s, color 0.3s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
}

/* ===== 转化表单 ===== */
.form-section {
  padding: var(--space-section) 0;
  background: var(--bg-card);
}
.form-section h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 16px;
}
.form-section .lead-text {
  font-size: 16px;
  color: var(--text-weak);
  margin-bottom: 28px;
  line-height: 1.7;
}
.service-guarantees { padding: 0; margin-bottom: 28px; }
.service-guarantees li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-body);
  padding: 8px 0;
  line-height: 1.6;
}
.service-guarantees i {
  color: var(--primary);
  font-size: 20px;
  flex-shrink: 0;
}
.form-side-img {
  border-radius: 12px;
  overflow: hidden;
}
.form-side-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 12px;
  transition: transform 0.3s;
}
.form-side-image:hover { transform: scale(1.02); }
.form-card {
  position: relative;
  background: var(--bg-card);
  border-radius: 20px;
  box-shadow: var(--shadow-form);
  padding: 40px 36px 36px;
  overflow: hidden;
}
.form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--accent);
}
.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.form-control,
.form-select {
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 15px;
  color: var(--text-main);
  transition: border-color 0.22s, box-shadow 0.22s;
}
.form-control:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background: #fff;
}
.form-control::placeholder { color: var(--text-light); }
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238792A2' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.btn-submit {
  width: 100%;
  height: 48px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  transition: background 0.22s, transform 0.22s;
  margin-top: 8px;
}
.btn-submit:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
}
.form-privacy {
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
  margin-top: 16px;
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0F172A;
  color: #CBD5E1;
  padding: 64px 0 0;
}
.site-footer .content-container { padding-bottom: 0; }
.footer-brand .brand-name {
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  display: block;
}
.footer-desc {
  font-size: 14px;
  color: #94A3B8;
  line-height: 1.8;
  max-width: 320px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: #94A3B8;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--primary); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #94A3B8;
  margin-bottom: 12px;
}
.footer-contact i { color: var(--primary); font-size: 16px; }
.footer-bottom {
  border-top: 1px solid #334155;
  margin-top: 48px;
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: #64748B;
}

/* ===== 响应式 ===== */
@media (max-width: 1199.98px) {
  .side-nav { display: none; }
  .mobile-header { display: flex; }
  .main-wrapper { margin-left: 0; }
  .mobile-header .mobile-menu { display: none; }
  .mobile-header .mobile-menu.open { display: block; }
}

@media (max-width: 991.98px) {
  .services-grid .service-col:nth-child(n+4) { margin-top: 0; }
  .services-grid .service-col:nth-child(n+4) .service-card { margin-top: 0; }
  .hero { min-height: 460px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .section-head h2 { font-size: 26px; }
  .form-section h2 { font-size: 26px; }
}

@media (max-width: 767.98px) {
  .content-container { padding: 0 16px; }
  .stats-section,
  .services-section,
  .comparison-section,
  .news-section,
  .faq-section,
  .form-section { padding: var(--space-section-mobile) 0; }
  .hero { padding: 56px 0; min-height: 400px; }
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .compare-card { margin-bottom: 16px; }
  .news-card { padding: 22px 20px; }
  .news-more { position: static; display: inline-block; margin-top: 10px; }
  .form-card { padding: 32px 20px 24px; }
  .site-footer { padding-top: 48px; }
  .footer-bottom { margin-top: 32px; }
}

@media (max-width: 575.98px) {
  .stat-card { padding: 20px 12px; }
  .stat-number { font-size: 32px; }
  .stat-name { font-size: 14px; }
  .stat-note { font-size: 12px; }
  .news-title { font-size: 16px; }
  .section-head { margin-bottom: 36px; }
  .btn { width: 100%; }
  .hero-actions .btn:last-child { margin-top: 0; }
}

/* roulang page: article */
:root {
    --primary: #2563EB;
    --primary-hover: #1E40AF;
    --primary-light: #EFF6FF;
    --accent: #F97316;
    --accent-hover: #EA580C;
    --bg-page: #F5F9FC;
    --bg-card: #FFFFFF;
    --bg-alt: #F8FAFC;
    --text-dark: #0F172A;
    --text-body: #334155;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-light: #8792A2;
    --border-color: #E2E8F0;
    --border-dark: #CBD5E1;
    --radius-card: 16px;
    --radius-btn: 8px;
    --radius-badge: 999px;
    --shadow-card: 0 4px 20px rgba(37,99,235,0.06);
    --shadow-hover: 0 8px 30px rgba(37,99,235,0.14);
    --shadow-form: 0 12px 40px rgba(15,23,42,0.08);
    --nav-width: 240px;
    --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-family);background:var(--bg-page);color:var(--text-body);font-size:16px;line-height:1.75;overflow-x:hidden;}
img{max-width:100%;height:auto;display:block;}
a{text-decoration:none;color:inherit;transition:color .2s ease;}
ul,ol{list-style:none;padding:0;margin:0;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
input,select,textarea{font-family:inherit;}

.content-container{max-width:1280px;margin:0 auto;padding:0 32px;}

/* 按钮 */
.btn-primary-custom{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary);color:#fff;border-radius:var(--radius-btn);padding:14px 36px;font-size:16px;font-weight:600;line-height:1;transition:background .2s ease,transform .2s ease,box-shadow .2s ease;border:2px solid var(--primary);}
.btn-primary-custom:hover{background:var(--primary-hover);border-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,0.24);color:#fff;}
.btn-outline-custom{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:transparent;color:var(--primary);border:2px solid var(--primary);border-radius:var(--radius-btn);padding:13px 36px;font-size:16px;font-weight:600;transition:background .2s ease,color .2s ease,transform .2s ease;}
.btn-outline-custom:hover{background:var(--primary-light);color:var(--primary-hover);transform:translateY(-2px);}

/* 导航 */
.mobile-header{position:relative;z-index:1000;}
.mobile-header .brand{display:none;}
.mobile-toggle{display:none;}
.side-nav{position:fixed;left:0;top:0;width:var(--nav-width);height:100vh;background:#fff;border-right:1px solid var(--border-color);padding:28px 0;display:flex;flex-direction:column;z-index:1100;}
.side-nav-logo{display:block;padding:0 24px 24px;border-bottom:1px solid var(--border-color);margin-bottom:24px;}
.side-nav-logo .logo-main{display:block;font-size:24px;font-weight:800;color:var(--text-dark);letter-spacing:1px;}
.side-nav-logo .logo-sub{display:block;font-size:12px;color:var(--text-muted);margin-top:2px;}
.side-nav-links{flex:1;overflow-y:auto;padding:0 12px;}
.side-nav-links li{margin-bottom:4px;}
.side-nav-link{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:10px;color:var(--text-body);font-size:15px;font-weight:500;position:relative;transition:background .2s ease,color .2s ease;}
.side-nav-link .nav-icon{color:var(--primary);font-size:8px;transition:transform .2s ease;}
.side-nav-link:hover{background:var(--primary-light);color:var(--primary);}
.side-nav-link.active{background:var(--primary-light);color:var(--primary);font-weight:700;}
.side-nav-link.active::before{content:'';position:absolute;left:-12px;top:50%;transform:translateY(-50%);width:4px;height:28px;background:var(--primary);border-radius:0 4px 4px 0;}
.side-nav-footer{padding:20px 24px;border-top:1px solid var(--border-color);font-size:13px;color:var(--text-muted);}
.mobile-menu{display:none;}

/* 桌面主体偏移 */
@media (min-width:1200px){
    body{margin-left:var(--nav-width);}
}

/* 移动端导航 */
@media (max-width:1199px){
    .mobile-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 20px;box-shadow:0 2px 12px rgba(15,23,42,0.04);}
    .mobile-header .brand{display:flex;align-items:center;gap:10px;}
    .brand-logo{width:38px;height:38px;background:var(--primary);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;}
    .brand-name{font-size:20px;font-weight:800;color:var(--text-dark);letter-spacing:1px;}
    .mobile-toggle{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;font-size:22px;color:var(--text-dark);background:var(--bg-alt);}
    .side-nav{display:none;}
    .mobile-menu{display:none;position:fixed;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border-color);box-shadow:0 12px 30px rgba(15,23,42,0.08);padding:12px 20px;z-index:1100;}
    .mobile-menu.open{display:block;}
    .mobile-menu-item{display:block;padding:14px 16px;font-size:16px;font-weight:500;color:var(--text-body);border-radius:10px;border-bottom:1px solid var(--border-color);}
    .mobile-menu-item:last-child{border-bottom:none;}
    .mobile-menu-item:hover{background:var(--primary-light);color:var(--primary);}
    .mobile-menu-item.active{color:var(--primary);font-weight:700;background:var(--primary-light);}
    body{margin-left:0;}
}

/* 面包屑 */
.breadcrumb-section{background:linear-gradient(90deg,#F5F9FC 0%,rgba(245,249,252,0.75) 50%,transparent 90%),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;border-bottom:1px solid var(--border-color);padding:40px 0 32px;}
.breadcrumb-nav{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-light);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb-nav a:hover{color:var(--primary);}
.breadcrumb-nav .separator{color:var(--border-dark);}
.breadcrumb-nav .current{color:var(--text-dark);font-weight:600;}

/* 文章区 */
.article-section{padding:48px 0 24px;}
.article-main{max-width:800px;margin:0 auto;}
.article-main h1{font-size:32px;font-weight:800;color:var(--text-dark);line-height:1.3;margin-bottom:20px;letter-spacing:0.5px;}
.article-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:14px;color:var(--text-muted);padding-bottom:24px;border-bottom:1px solid var(--border-color);margin-bottom:32px;}
.article-meta i{color:var(--primary);margin-right:4px;}
.article-content{max-width:760px;margin:0 auto 32px;}
.article-content p{font-size:16px;line-height:1.8;color:var(--text-body);margin-bottom:24px;}
.article-content h2,.article-content h3{color:var(--text-dark);font-weight:700;margin:32px 0 16px;}
.article-content h2{font-size:24px;}
.article-content h3{font-size:20px;}
.article-content blockquote{border-left:4px solid var(--primary);background:var(--primary-light);border-radius:0 12px 12px 0;padding:16px 20px;margin:24px 0;color:var(--text-secondary);}
.article-content ul,.article-content ol{margin:0 0 24px;padding-left:20px;}
.article-content ul li{list-style:disc;margin-bottom:8px;}
.article-content ol li{list-style:decimal;margin-bottom:8px;}
.article-content img{border-radius:12px;margin:24px 0;}
.article-content code{background:var(--bg-alt);border:1px solid var(--border-color);padding:2px 6px;border-radius:6px;font-size:14px;overflow-x:auto;white-space:nowrap;}
.article-not-found{text-align:center;padding:80px 20px;}
.article-not-found p{font-size:20px;color:var(--text-secondary);margin-bottom:24px;}

/* 标签 */
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;padding-top:28px;border-top:1px solid var(--border-color);}
.tag-pill{display:inline-block;padding:6px 16px;background:var(--primary-light);color:var(--primary);border-radius:var(--radius-badge);font-size:13px;font-weight:600;transition:background .2s ease,color .2s ease;}
.tag-pill:hover{background:var(--primary);color:#fff;}

/* 返回列表 */
.back-to-list{display:inline-flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:15px;font-weight:500;padding:10px 20px;margin-top:24px;border-radius:var(--radius-btn);transition:color .2s ease,background .2s ease;}
.back-to-list:hover{color:var(--primary);background:var(--primary-light);}
.back-to-list i{font-size:18px;}

/* 相关阅读 */
.related-section{padding:64px 0;background:var(--bg-card);border-top:1px solid var(--border-color);}
.related-header{text-align:center;margin-bottom:48px;}
.related-header h2{font-size:28px;font-weight:800;color:var(--text-dark);position:relative;display:inline-block;}
.related-header h2::after{content:'';position:absolute;left:50%;bottom:-10px;transform:translateX(-50%);width:48px;height:3px;background:var(--accent);border-radius:4px;}
.related-cards{max-width:980px;margin:0 auto;}
.related-card{display:flex;align-items:center;gap:24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-card);padding:20px;transition:box-shadow .3s ease,transform .3s ease;height:100%;}
.related-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.related-card-img{width:220px;height:140px;flex-shrink:0;overflow:hidden;border-radius:12px;}
.related-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.related-card:hover .related-card-img img{transform:scale(1.03);}
.related-card-body{flex:1;min-width:0;}
.related-card-body h3{font-size:17px;font-weight:700;color:var(--text-dark);margin-bottom:8px;line-height:1.4;transition:color .2s ease;}
.related-card:hover .related-card-body h3{color:var(--primary);}
.related-card-body p{font-size:14px;color:var(--text-secondary);line-height:1.6;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.related-card-link{font-size:14px;color:var(--primary);font-weight:600;}

/* FAQ */
.faq-section{padding:88px 0;background:var(--bg-page);}
.faq-wrap{max-width:1060px;margin:0 auto;}
.faq-intro h3{font-size:24px;font-weight:800;color:var(--text-dark);margin-bottom:12px;}
.faq-intro p{font-size:15px;color:var(--text-light);line-height:1.7;}
.faq-list .faq-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-card);margin-bottom:14px;transition:box-shadow .3s ease,border-color .3s ease;overflow:hidden;}
.faq-item.open{border-color:var(--primary);box-shadow:var(--shadow-card);}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;background:transparent;font-size:15px;font-weight:600;color:var(--text-dark);transition:color .2s ease;text-align:left;}
.faq-question:hover{color:var(--primary);}
.faq-question .faq-icon{font-size:18px;color:var(--primary);transition:transform .3s ease;flex-shrink:0;margin-left:16px;}
.faq-item.open .faq-question{color:var(--primary);}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .35s ease;font-size:14px;color:var(--text-secondary);line-height:1.8;}
.faq-item.open .faq-answer{max-height:400px;padding-bottom:20px;}

/* CTA */
.cta-section{padding:64px 0 88px;background:var(--bg-page);}
.cta-card{max-width:1060px;margin:0 auto;background:var(--primary-light);border-radius:var(--radius-card);padding:64px 48px;text-align:center;position:relative;overflow:hidden;}
.cta-card::before{content:'';position:absolute;top:0;left:0;width:6px;height:100%;background:var(--accent);border-radius:0 6px 6px 0;}
.cta-card h2{font-size:28px;font-weight:800;color:var(--text-dark);margin-bottom:12px;}
.cta-card p{font-size:16px;color:var(--text-secondary);margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto;}
.cta-card .btn-primary-custom{padding:16px 48px;font-size:16px;}

/* 页脚 */
.site-footer{background:var(--text-dark);padding:64px 0 0;color:#CBD5E1;}
.site-footer .content-container{max-width:1280px;}
.footer-brand .brand-name{font-size:24px;font-weight:800;color:#fff;letter-spacing:1px;display:inline-block;margin-bottom:12px;}
.footer-desc{font-size:14px;color:#94A3B8;line-height:1.7;max-width:320px;margin:0;padding-top:8px;border-top:1px solid #334155;}
.footer-title{color:#fff;font-size:18px;font-weight:700;margin-bottom:20px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:#94A3B8;font-size:14px;transition:color .2s ease;}
.footer-links a:hover{color:var(--primary);}
.footer-contact li{color:#94A3B8;font-size:14px;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.footer-contact i{color:var(--primary);font-size:16px;}
.footer-bottom{border-top:1px solid #334155;padding:24px 0;margin-top:48px;text-align:center;}
.footer-bottom p{font-size:13px;color:#64748B;margin:0;}

/* 响应式 */
@media (max-width:991px){
    .content-container{padding:0 24px;}
    .related-card{flex-direction:column;align-items:flex-start;}
    .related-card-img{width:100%;height:180px;}
    .article-main h1{font-size:28px;}
    .cta-card{padding:40px 24px;}
    .cta-card h2{font-size:24px;}
}
@media (max-width:767px){
    .content-container{padding:0 16px;}
    .breadcrumb-section{padding:28px 0 24px;}
    .article-main h1{font-size:24px;}
    .article-meta{font-size:13px;gap:10px;}
    .related-card-img{height:160px;}
    .faq-intro{text-align:center;margin-bottom:24px;}
    .cta-card{padding:32px 20px;}
    .cta-card h2{font-size:22px;}
    .cta-card .btn-primary-custom{width:100%;}
    .site-footer{padding-top:48px;}
}
@media (max-width:575px){
    .content-container{padding:0 14px;}
    .article-main h1{font-size:22px;}
    .article-content p{font-size:15px;}
    .tag-pill{font-size:12px;padding:5px 12px;}
    .back-to-list{width:100%;justify-content:center;}
    .related-card{padding:16px;}
    .related-card-body h3{font-size:16px;}
}

/* roulang page: category1 */
:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --primary-light: #EFF6FF;
  --accent: #F97316;
  --accent-dark: #EA580C;
  --bg: #F5F9FC;
  --card-bg: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #8792A2;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(37, 99, 235, 0.06);
  --shadow-hover: 0 8px 30px rgba(37, 99, 235, 0.14);
  --section-space: 96px;
  --container-max: 1280px;
  --nav-width: 240px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  padding-left: var(--nav-width);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
ul,
ol {
  margin: 0;
  padding: 0;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}
.container,
.content-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
}
.row {
  --bs-gutter-x: 24px;
}

/* ========== header & nav ========== */
.mobile-header .brand,
.mobile-header .mobile-toggle,
.mobile-header .mobile-menu {
  display: none;
}
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 32px 20px;
  z-index: 1040;
}
.side-nav-logo {
  display: flex;
  flex-direction: column;
  padding: 0 8px 24px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.logo-main {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 2px;
}
.logo-sub {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 2px;
  letter-spacing: .5px;
}
.side-nav-links {
  list-style: none;
  flex: 1;
  padding: 24px 0;
}
.side-nav-link {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: background .2s ease, color .2s ease;
}
.side-nav-link .nav-icon {
  color: var(--primary);
  margin-right: 10px;
  font-size: 8px;
  transition: transform .2s ease;
}
.side-nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.side-nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  position: relative;
}
.side-nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}
.side-nav-footer {
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
  padding: 16px 0 0;
  border-top: 1px solid var(--border);
}

/* ========== buttons ========== */
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border-width: 1px;
  border-style: solid;
  text-decoration: none;
  cursor: pointer;
  transition: all .25s ease;
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, .2);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ========== hero ========== */
.page-hero {
  padding: 120px 0 80px;
  background: linear-gradient(90deg, #F5F9FC 0%, rgba(245, 249, 252, .75) 50%, transparent 90%), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.hero-badge {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.page-hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
}
.page-hero .hero-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ========== section common ========== */
.content-section,
.features-section,
.scenarios-section,
.process-section,
.faq-section {
  padding: var(--section-space) 0;
}
.content-section {
  background: #fff;
}
.features-section {
  background: #F8FAFC;
}
.scenarios-section {
  background: #fff;
}
.process-section {
  background: #F8FAFC;
}
.faq-section {
  background: #fff;
}
.section-head {
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
}

/* ========== alternate cards ========== */
.alternate-grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.alt-card {
  display: flex;
  align-items: center;
  gap: 40px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  transition: box-shadow .3s ease, transform .3s ease;
}
.alt-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.alt-card-image {
  flex: 0 0 45%;
  border-radius: 12px;
  overflow: hidden;
  background: var(--border);
  aspect-ratio: 16 / 9;
}
.alt-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.alt-card:hover .alt-card-image img {
  transform: scale(1.02);
}
.alt-card-body {
  flex: 1;
}
.card-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.alt-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}
.alt-card-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .2s ease, color .2s ease;
}
.card-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}
.alt-card:nth-child(even) {
  flex-direction: row-reverse;
}

/* ========== feature cards ========== */
.feature-card {
  background: #fff;
  border: 1px solid rgba(226, 232, 240, .7);
  border-radius: var(--radius);
  padding: 28px 24px;
  height: 100%;
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, .2);
}
.feature-card i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  font-size: 22px;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 12px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== scenario cards ========== */
.scenario-card {
  background: #fff;
  border: 1px solid rgba(226, 232, 240, .7);
  border-radius: var(--radius);
  padding: 24px;
  height: 100%;
  transition: box-shadow .3s ease, transform .3s ease;
}
.scenario-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.scenario-card i {
  font-size: 26px;
  color: var(--primary);
  display: block;
  margin-bottom: 14px;
}
.scenario-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.scenario-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== process steps ========== */
.process-step {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  height: 100%;
  position: relative;
  transition: box-shadow .3s ease, transform .3s ease;
}
.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.step-num {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  opacity: .12;
  line-height: 1;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  padding-right: 32px;
}
.process-step p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== faq ========== */
.faq-wrap {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.faq-head-col {
  flex: 0 0 33.333%;
}
.faq-head-col h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.faq-head-col p {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 240px;
}
.faq-list-col {
  flex: 1;
  min-width: 0;
}
.accordion-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow .3s ease, background .3s ease;
}
.accordion-item:has(.accordion-button:not(.collapsed)) {
  background: #F8FAFC;
  box-shadow: var(--shadow);
}
.accordion-button {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: transparent;
  border: none;
  outline: none;
  cursor: pointer;
  transition: color .3s ease;
}
.accordion-button:not(.collapsed) {
  color: var(--primary);
  box-shadow: none;
}
.accordion-button:focus {
  box-shadow: none;
  outline: none;
}
.accordion-button::after {
  content: '+';
  background: none !important;
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  margin-left: auto;
  flex-shrink: 0;
  transform: rotate(0deg);
  transition: transform .3s ease;
}
.accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
}
.accordion-body {
  padding: 0 20px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ========== cta ========== */
.cta-section {
  padding: 64px 0 96px;
  background: var(--bg);
}
.cta-bar {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  border: 1px solid rgba(37, 99, 235, .08);
}
.cta-bar h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cta-bar p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========== footer ========== */
.site-footer {
  background: #0F172A;
  padding: 64px 0 0;
  color: #94A3B8;
  font-size: 14px;
}
.site-footer .footer-brand .brand-name {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}
.footer-desc {
  margin: 12px 0 0;
  max-width: 320px;
  line-height: 1.7;
  color: #8792A2;
}
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links,
.footer-contact {
  list-style: none;
  padding: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: #94A3B8;
  transition: color .2s ease;
}
.footer-links a:hover {
  color: #fff;
}
.footer-contact li {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i {
  color: var(--primary);
}
.footer-bottom {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid #334155;
  text-align: center;
  color: #64748B;
  font-size: 13px;
}

/* ========== responsive ========== */
@media (max-width: 1199.98px) {
  body {
    padding-left: 0;
  }
  .side-nav {
    display: none;
  }
  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 1050;
    background: #fff;
    border-bottom: 1px solid var(--border);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
  }
  .mobile-header .brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
  }
  .brand-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--primary);
    color: #fff;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
  }
  .brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
  }
  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 20px;
    color: var(--text);
    cursor: pointer;
    transition: background .2s ease;
  }
  .mobile-toggle:hover {
    background: var(--primary-light);
  }
  .mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
  }
  .mobile-menu.open {
    display: block;
  }
  .mobile-menu-item {
    display: block;
    height: 48px;
    padding: 0 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
  }
  .mobile-menu-item:last-child {
    border-bottom: none;
  }
  .mobile-menu-item.active {
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-light);
  }
}
@media (max-width: 991.98px) {
  .page-hero {
    padding: 80px 0 56px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .alt-card {
    flex-direction: column;
    gap: 24px;
  }
  .alt-card:nth-child(even) {
    flex-direction: column;
  }
  .alt-card-image {
    flex: 0 0 auto;
    width: 100%;
  }
  .faq-wrap {
    flex-direction: column;
  }
  .faq-head-col {
    flex: 0 0 100%;
  }
  .faq-head-col p {
    max-width: 100%;
  }
  :root {
    --section-space: 72px;
  }
}
@media (max-width: 767.98px) {
  .container,
  .content-container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .hero-desc {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .section-head h2 {
    font-size: 24px;
  }
  :root {
    --section-space: 64px;
  }
  .process-step {
    padding: 20px;
  }
  .cta-section {
    padding: 48px 0 64px;
  }
}
@media (max-width: 575.98px) {
  .hero-actions .btn {
    width: 100%;
  }
  .feature-card,
  .scenario-card,
  .process-step {
    padding: 20px 16px;
  }
  .alt-card {
    padding: 16px;
  }
  .cta-bar {
    padding: 32px 16px;
  }
  .cta-bar .btn {
    width: 100%;
  }
}