/* roulang page: index */
:root {
  --primary: #3E7CB1;
  --primary-hover: #356C9C;
  --primary-light: #EAF1F8;
  --accent: #C89B6D;
  --bg-white: #FFFFFF;
  --bg-alt: #F7F9FC;
  --text-body: #3D4F5F;
  --text-heading: #1A2C3B;
  --text-muted: #788895;
  --border: rgba(30, 60, 90, 0.08);
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 20px rgba(30, 60, 90, 0.06);
  --shadow-hover: 0 8px 30px rgba(30, 60, 90, 0.10);
  --font: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --container: 1140px;
  --spacing-section: 96px;
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-white);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  margin: 0 0 16px;
  font-weight: 700;
  line-height: 1.4;
}
p { margin: 0 0 16px; }
ul, ol { padding: 0; margin: 0 0 16px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--spacing-section) 0;
}
.section-alt {
  background: var(--bg-alt);
}

/* ===== Section Head ===== */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  padding: 4px 16px;
  background: var(--primary-light);
  border-radius: var(--radius-pill);
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.6;
  margin: 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(62, 124, 177, 0.25);
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(62, 124, 177, 0.32);
}
.btn-outline {
  background: transparent;
  border-color: rgba(62, 124, 177, 0.4);
  color: var(--primary);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-hover);
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}
.btn-light:hover {
  background: var(--primary-light);
  color: var(--primary-hover);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}
.btn-block { width: 100%; }

/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.header.scrolled {
  box-shadow: 0 6px 24px rgba(30, 60, 90, 0.06);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: 0.5px;
  line-height: 1.2;
}
.brand .brand-core {
  color: var(--primary);
}
.brand .brand-sub {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-top: 2px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.main-nav .nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 20px 0;
  transition: var(--transition);
}
.main-nav .nav-link:hover {
  color: var(--primary);
}
.main-nav .nav-link.active {
  color: var(--primary);
}
.main-nav .nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 8px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  padding: 10px 22px;
  border: 1px solid rgba(62, 124, 177, 0.3);
  border-radius: var(--radius-pill);
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-hover);
  transform: translateY(-1px);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-heading);
  cursor: pointer;
  padding: 8px;
  line-height: 1;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(180deg, var(--bg-alt) 0%, #FDFEFF 100%);
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-attachment: auto;
  opacity: 0.12;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 64px;
}
.hero-content {
  flex: 1.1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.hero-badge i {
  color: var(--accent);
}
.hero h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text-heading);
  letter-spacing: -0.5px;
}
.hero h1 .highlight {
  color: var(--primary);
}
.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-body);
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}
.hero-tags i {
  color: var(--primary);
  font-size: 12px;
}
.hero-visual {
  flex: 0.9;
  text-align: center;
}
.hero-visual img {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(30, 60, 90, 0.18);
  transform: translateY(-8px);
  transition: var(--transition);
}
.hero-visual img:hover {
  transform: translateY(-12px) scale(1.01);
  box-shadow: 0 28px 70px rgba(30, 60, 90, 0.22);
}

/* ===== Stats ===== */
.stats-section {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 16px;
}
.stat-num {
  font-size: 40px;
  font-weight: 200;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* ===== Promo Bar ===== */
.promo-bar {
  background: linear-gradient(135deg, #356C9C 0%, #3E7CB1 100%);
  padding: 28px 0;
  color: #fff;
}
.promo-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.promo-text {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 17px;
  font-weight: 600;
}
.promo-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 1px;
}
.promo-countdown {
  display: flex;
  gap: 10px;
}
.cd-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  padding: 10px 14px;
  min-width: 70px;
  font-size: 13px;
  line-height: 1.2;
}
.cd-item b {
  font-size: 26px;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 2px;
}

/* ===== Services ===== */
.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  opacity: 0;
  transition: var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(62, 124, 177, 0.2);
}
.service-card:hover::before {
  opacity: 1;
}
.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 14px;
  font-size: 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}
.service-card:hover .service-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
}
.service-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}
.service-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ===== Category Cards ===== */
.cat-card {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  height: 100%;
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}
.cat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.cat-img {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.cat-card:hover .cat-img {
  transform: scale(1.04);
}
.cat-body h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 8px;
}
.cat-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}
.cat-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.cat-link i {
  transition: transform 0.3s ease;
}
.cat-card:hover .cat-link i {
  transform: translateX(4px);
}

/* ===== Features ===== */
.feature-item {
  display: flex;
  gap: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: 100%;
  transition: var(--transition);
}
.feature-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  font-size: 20px;
}
.feature-text h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.feature-text p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ===== Process ===== */
.process-section {
  background: var(--bg-alt);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  text-align: center;
  padding: 40px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: var(--transition);
}
.process-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.process-num {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 26px;
  font-weight: 200;
}
.process-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.process-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}
.process-arrow {
  content: '';
  position: absolute;
  top: 50%;
  right: -18px;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 18px;
  z-index: 2;
}

/* ===== News ===== */
.news-card {
  display: block;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: 100%;
  transition: var(--transition);
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(62, 124, 177, 0.2);
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.news-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
}
.news-date {
  font-size: 13px;
  color: var(--text-muted);
}
.news-card h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  transition: var(--transition);
}
.news-card:hover h3 {
  color: var(--primary);
}
.news-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}
.empty-tip {
  text-align: center;
  padding: 48px 20px;
  font-size: 16px;
  color: var(--text-muted);
  background: var(--bg-white);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

/* ===== Testimonials ===== */
.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  height: 100%;
  transition: var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.testimonial-stars {
  color: var(--accent);
  font-size: 15px;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.testimonial-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 20px;
}
.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.testimonial-avatar {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 16px;
  font-weight: 600;
}
.testimonial-user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-heading);
}
.testimonial-user-type {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-alt);
}
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active {
  border-color: rgba(62, 124, 177, 0.3);
  box-shadow: var(--shadow-card);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  user-select: none;
  transition: var(--transition);
}
.faq-q:hover {
  color: var(--primary);
}
.faq-q .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 13px;
  transition: var(--transition);
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-a {
  display: none;
  padding: 0 24px 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}
.faq-item.active .faq-a {
  display: block;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #2E5F8A 0%, #3E7CB1 100%);
  padding: 80px 0;
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
}
.cta-inner h2 {
  color: #fff;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 17px;
  line-height: 1.7;
  opacity: 0.9;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
  background: #1E2C3A;
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .brand-core {
  color: #5FA3D6;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  margin: 0;
}
.footer-links li {
  margin-bottom: 12px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.65);
  transition: var(--transition);
  position: relative;
  padding-left: 0;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact {
  list-style: none;
  margin: 0;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-contact i {
  color: #5FA3D6;
  margin-top: 4px;
  font-size: 14px;
}
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 46px;
  height: 46px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: var(--transition);
  box-shadow: 0 6px 18px rgba(62, 124, 177, 0.3);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover {
  background: var(--primary-hover);
  transform: translateY(-3px);
}

/* ===== Responsive ===== */
@media screen and (max-width: 1023px) {
  :root {
    --spacing-section: 64px;
  }
  .hero {
    padding: 140px 0 80px;
  }
  .hero-inner {
    gap: 32px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .process-arrow {
    display: none;
  }
}

@media screen and (max-width: 768px) {
  .header {
    height: 64px;
  }
  .header-inner {
    height: 64px;
    padding: 0 16px;
  }
  .nav-toggle {
    display: block;
  }
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 24px 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(30, 60, 90, 0.1);
    display: none;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-link {
    display: block;
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
  }
  .main-nav .nav-link.active::after {
    left: 0;
    transform: none;
    bottom: 4px;
    width: 24px;
  }
  .nav-cta {
    margin-top: 16px;
    width: 100%;
    justify-content: center;
  }
  .hero {
    padding: 120px 0 60px;
  }
  .hero-inner {
    flex-direction: column-reverse;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-visual img {
    max-width: 340px;
    margin-bottom: 8px;
  }
  .promo-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .promo-countdown {
    justify-content: center;
  }
  .cat-card {
    flex-direction: column;
    text-align: center;
    padding: 24px;
  }
  .cat-img {
    width: 96px;
    height: 96px;
    margin: 0 auto;
  }
  .faq-q {
    padding: 18px 20px;
    font-size: 15px;
  }
  .faq-a {
    padding: 0 20px 18px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
}

@media screen and (max-width: 540px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .cta-actions {
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .promo-countdown {
    gap: 6px;
  }
  .cd-item {
    min-width: 56px;
    padding: 8px;
  }
  .cd-item b {
    font-size: 20px;
  }
}

/* roulang page: category1 */
:root{
  --primary:#3E7CB1;
  --primary-hover:#356C9C;
  --primary-light:#EAF1F8;
  --accent:#C89B6D;
  --bg:#FFFFFF;
  --bg-alt:#F7F9FC;
  --text:#3D4F5F;
  --heading:#1A2C3B;
  --muted:#788895;
  --border:rgba(30,60,90,0.08);
  --radius-card:12px;
  --radius-btn:8px;
  --radius-pill:999px;
  --shadow-card:0 4px 20px rgba(30,60,90,0.06);
  --shadow-hover:0 8px 30px rgba(30,60,90,0.10);
  --font-stack:-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --space-lg:96px;
  --space-md:64px;
  --space-sm:48px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-stack);color:var(--text);background:var(--bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:all .25s ease}
button{font-family:var(--font-stack);cursor:pointer}
ul{list-style:none}
.container{max-width:1140px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-lg) 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.section-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:6px 18px;border-radius:var(--radius-pill);letter-spacing:.5px;margin-bottom:16px}
.section-head h2{font-size:28px;font-weight:650;color:var(--heading);line-height:1.4;letter-spacing:.3px;margin:0 0 12px}
.section-head p{font-size:17px;color:var(--muted);line-height:1.6;margin:0}
/* ===== Header ===== */
.header{position:fixed;top:0;left:0;right:0;height:76px;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:1000}
.header-inner{max-width:1280px;height:100%;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:baseline;gap:2px}
.brand-core{font-size:22px;font-weight:700;color:var(--heading);letter-spacing:.5px}
.brand-sub{font-size:13px;font-weight:500;color:var(--primary);margin-left:2px}
.main-nav{display:flex;align-items:center;gap:8px}
.nav-link{position:relative;font-size:16px;font-weight:500;color:var(--text);padding:10px 18px;border-radius:var(--radius-btn);transition:color .25s ease}
.nav-link:hover{color:var(--primary)}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{content:'';position:absolute;left:50%;transform:translateX(-50%);bottom:2px;width:18px;height:2px;background:var(--primary);border-radius:2px}
.nav-cta{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--primary);padding:9px 20px;border:1px solid var(--primary);border-radius:var(--radius-btn);margin-left:10px;transition:all .25s ease}
.nav-cta:hover{background:var(--primary);color:#fff;box-shadow:var(--shadow-card)}
.nav-toggle{display:none;background:none;border:none;font-size:22px;color:var(--heading);padding:6px}
/* ===== Hero ===== */
.hero{position:relative;padding:190px 0 140px;background:url('/assets/images/backpic/back-1.png') center center / cover no-repeat}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,255,255,0.95) 0%,rgba(255,255,255,0.85) 55%,rgba(234,241,248,0.75) 100%)}
.hero-content{position:relative;z-index:2;max-width:760px}
.hero-tag{display:inline-block;background:rgba(62,124,177,0.12);color:var(--primary);font-size:14px;font-weight:600;letter-spacing:.5px;padding:8px 20px;border-radius:var(--radius-pill);margin-bottom:24px}
.hero h1{font-size:42px;font-weight:700;color:var(--heading);line-height:1.3;margin:0 0 20px;letter-spacing:.5px}
.hero p{font-size:17px;color:var(--text);line-height:1.8;margin:0 0 32px;max-width:620px}
.hero-buttons{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:36px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:500;padding:14px 32px;border-radius:var(--radius-btn);border:none;transition:all .3s ease}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(62,124,177,0.25)}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(62,124,177,0.30);color:#fff}
.btn-ghost{background:transparent;color:var(--primary);border:1px solid rgba(62,124,177,0.5)}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-hover);transform:translateY(-2px)}
.hero-points{display:flex;flex-wrap:wrap;gap:24px;margin:0}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.hero-points li i{color:var(--primary);font-size:15px}
/* ===== Stats ===== */
.stats-section{position:relative;z-index:5;margin-top:-56px;padding-bottom:80px}
.stats-inner{background:#fff;border-radius:16px;box-shadow:0 8px 30px rgba(30,60,90,0.08);padding:40px 48px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border:1px solid var(--border)}
.stat-item{text-align:center}
.stat-number{font-size:40px;font-weight:200;color:var(--primary);line-height:1.2;letter-spacing:1px}
.stat-label{font-size:13px;color:var(--muted);margin-top:6px;letter-spacing:.3px}
/* ===== Features ===== */
.features{padding:72px 0 var(--space-lg)}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .3s ease,box-shadow .3s ease;height:100%;display:flex;flex-direction:column}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.feature-img{overflow:hidden;aspect-ratio:16/10;position:relative}
.feature-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.feature-card:hover .feature-img img{transform:scale(1.05)}
.feature-body{padding:28px;display:flex;flex-direction:column;flex:1}
.feature-body h3{font-size:19px;font-weight:600;color:var(--heading);margin:0 0 12px;line-height:1.45}
.feature-body p{font-size:15px;color:var(--muted);line-height:1.75;margin:0}
.feature-body .feature-link{margin-top:16px;font-size:14px;font-weight:500;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.feature-body .feature-link:hover{color:var(--primary-hover);gap:10px}
/* ===== Scenarios ===== */
.scenarios{padding:var(--space-lg) 0;background:var(--bg-alt)}
.scenario-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:32px 28px;height:100%;text-align:center;transition:transform .3s ease,box-shadow .3s ease}
.scenario-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.scenario-icon{width:64px;height:64px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 20px}
.scenario-card h3{font-size:18px;font-weight:600;color:var(--heading);margin:0 0 10px}
.scenario-card p{font-size:14px;color:var(--muted);line-height:1.7;margin:0;min-height:72px}
.scenario-tag{display:inline-block;margin-top:18px;font-size:13px;font-weight:500;color:var(--accent);background:rgba(200,155,109,0.10);padding:5px 16px;border-radius:var(--radius-pill)}
/* ===== Process ===== */
.process{padding:var(--space-lg) 0}
.process-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.process-step{position:relative;text-align:center;padding:32px 20px;background:var(--bg-alt);border-radius:var(--radius-card);border:1px solid var(--border);transition:transform .3s ease,box-shadow .3s ease}
.process-step:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.process-step::before{counter-increment:step;content:counter(step);position:absolute;top:-18px;left:50%;transform:translateX(-50%);width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;font-size:16px;font-weight:600;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px rgba(62,124,177,0.25)}
.process-icon{font-size:30px;color:var(--primary);margin:8px 0 16px}
.process-step h3{font-size:17px;font-weight:600;color:var(--heading);margin:0 0 10px}
.process-step p{font-size:14px;color:var(--muted);line-height:1.7;margin:0}
/* ===== Security ===== */
.security{padding:var(--space-lg) 0;background:var(--bg-alt)}
.security-wrap{display:flex;align-items:center;gap:60px;flex-wrap:wrap}
.security-media{flex:1 1 420px;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card)}
.security-media img{width:100%;height:360px;object-fit:cover}
.security-text{flex:1 1 420px}
.security-text h2{font-size:28px;font-weight:650;color:var(--heading);line-height:1.4;margin:0 0 16px}
.security-text>p{font-size:16px;color:var(--muted);line-height:1.75;margin:0 0 28px}
.security-list{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.security-list li{display:flex;align-items:flex-start;gap:12px;padding:16px 18px;background:#fff;border-radius:var(--radius-card);border:1px solid var(--border);font-size:14px;color:var(--text);line-height:1.6;transition:box-shadow .25s ease}
.security-list li:hover{box-shadow:var(--shadow-card)}
.security-list li i{color:var(--primary);font-size:16px;flex-shrink:0;margin-top:4px}
.security-list strong{display:block;font-weight:600;color:var(--heading);margin-bottom:2px}
/* ===== FAQ ===== */
.faq{padding:var(--space-lg) 0}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);margin-bottom:16px;overflow:hidden;transition:box-shadow .25s ease}
.faq-item:hover{box-shadow:var(--shadow-card)}
.faq-item.open{border-color:rgba(62,124,177,0.25)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:none;padding:22px 28px;font-size:16px;font-weight:500;color:var(--heading);text-align:left;cursor:pointer;line-height:1.5;gap:16px}
.faq-question i{color:var(--primary);font-size:14px;transition:transform .3s ease;flex-shrink:0}
.faq-item.open .faq-question i{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s ease;padding:0 28px;border-top:0 solid var(--border)}
.faq-item.open .faq-answer{max-height:360px;padding:0 28px 22px;border-top-width:1px;border-top-style:solid;border-top-color:var(--border)}
.faq-answer p{font-size:15px;color:var(--muted);line-height:1.75;padding-top:16px;margin:0}
/* ===== CTA ===== */
.cta{padding:80px 0;background:var(--bg-alt)}
.cta-box{background:linear-gradient(135deg,#fff 0%,var(--primary-light) 100%);border-radius:20px;padding:56px 48px;text-align:center;border:1px solid rgba(62,124,177,0.12);box-shadow:var(--shadow-card);position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0.6}
.cta-box h2{font-size:28px;font-weight:650;color:var(--heading);margin:0 0 12px;line-height:1.4}
.cta-box p{font-size:16px;color:var(--muted);margin:0 0 32px}
.cta-box .btn-primary{padding:16px 40px;font-size:16px}
/* ===== Footer ===== */
.footer{background:#1A2C3B;color:#A9B8C5;padding:64px 0 24px}
.footer-inner{display:grid;grid-template-columns:1.4fr 0.8fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand{font-size:20px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand .brand-core{color:#fff}
.footer-brand .brand-sub{color:var(--primary)}
.footer-desc{font-size:14px;line-height:1.75;color:#8FA3B2;margin-bottom:20px;max-width:360px}
.footer-social{display:flex;gap:12px}
.footer-social a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;color:#A9B8C5;font-size:15px;transition:all .25s ease}
.footer-social a:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.5px}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:#8FA3B2;transition:color .25s ease}
.footer-links a:hover{color:#fff}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:#8FA3B2;margin-bottom:12px}
.footer-contact li i{color:var(--primary);width:16px}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:24px;text-align:center;font-size:13px;color:#7A8FA0}
/* ===== Responsive ===== */
@media(max-width:1023px){
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr);gap:32px}
  .security-wrap{gap:40px}
}
@media(max-width:640px){
  .section{padding:var(--space-sm) 0}
  .header{padding:0 12px}
  .header-inner{padding:0 20px}
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:76px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--border);box-shadow:0 12px 24px rgba(30,60,90,0.10)}
  .main-nav.open{display:flex}
  .nav-link{padding:12px 10px;font-size:16px}
  .nav-link.active::after{left:18px;transform:none;width:16px}
  .nav-cta{margin:10px 0 0;justify-content:center}
  .hero{padding:150px 0 100px}
  .hero h1{font-size:28px}
  .hero p{font-size:15px}
  .hero-buttons .btn{width:100%}
  .hero-points{flex-direction:column;gap:10px}
  .stats-section{margin-top:-40px;padding-bottom:56px}
  .stats-inner{grid-template-columns:repeat(2,1fr);padding:24px;gap:18px}
  .stat-number{font-size:28px}
  .section-head h2{font-size:24px}
  .section-head p{font-size:15px}
  .feature-body{padding:20px}
  .process-steps{grid-template-columns:1fr;gap:32px}
  .process-step{padding:28px 16px}
  .security-list{grid-template-columns:1fr}
  .faq-question{padding:18px 20px;font-size:15px}
  .faq-item.open .faq-answer{padding:0 20px 18px}
  .cta-box{padding:40px 24px}
  .cta-box h2{font-size:22px}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer{padding:48px 0 24px}
}
@media(max-width:360px){
  .hero h1{font-size:24px}
  .brand-core{font-size:18px}
  .stat-number{font-size:24px}
}

/* roulang page: article */
:root {
  --primary: #3E7CB1;
  --primary-hover: #356C9C;
  --primary-light: #EAF1F8;
  --accent: #C89B6D;
  --bg: #FFFFFF;
  --bg-alt: #F7F9FC;
  --text: #3D4F5F;
  --heading: #1A2C3B;
  --muted: #788895;
  --border: rgba(30, 60, 90, 0.08);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 20px rgba(30, 60, 90, 0.06);
  --shadow-hover: 0 8px 30px rgba(30, 60, 90, 0.10);
  --font: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --header-h: 76px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul, ol {
  list-style: none;
}

.grid-container,
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: 28px;
  font-weight: 650;
  color: var(--heading);
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 30px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(62, 124, 177, 0.18);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(62, 124, 177, 0.25);
}
.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
}
.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .3px;
  background: var(--primary-light);
  color: var(--primary);
}
.tag-primary {
  background: var(--primary);
  color: #fff;
}
.tag-light {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1140px;
  height: 100%;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: .5px;
  line-height: 1;
}
.brand-core {
  font-size: 20px;
  color: var(--heading);
}
.brand-sub {
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 26px;
  position: relative;
  transition: color .2s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link.active {
  color: var(--primary);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.nav-cta {
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-light);
  padding: 9px 22px;
  border-radius: var(--radius-pill);
  margin-left: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all .2s ease;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--primary);
  color: #fff;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
}

.article-hero {
  position: relative;
  margin-top: var(--header-h);
  padding: 130px 0 80px;
  background-image: linear-gradient(180deg, rgba(247, 249, 252, 0.55), rgba(255, 255, 255, 0.92)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
}
.article-hero .grid-container {
  position: relative;
  z-index: 1;
}
.article-hero__title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--heading);
  margin: 20px auto 0;
  max-width: 860px;
  letter-spacing: .3px;
}
.article-hero__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--muted);
}
.article-hero__meta i {
  color: var(--primary);
  margin-right: 4px;
}
.article-hero__meta .dot {
  color: var(--accent);
  font-weight: 700;
}

.article-main {
  padding: 72px 0 96px;
  background: #fff;
}
.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--heading);
  font-weight: 650;
  line-height: 1.4;
  margin: 44px 0 18px;
}
.article-content h1 {
  font-size: 28px;
}
.article-content h2 {
  font-size: 24px;
}
.article-content h3 {
  font-size: 19px;
}
.article-content h4 {
  font-size: 17px;
}
.article-content p {
  margin-bottom: 24px;
}
.article-content ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}
.article-content ul li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 12px;
}
.article-content ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}
.article-content ol {
  list-style: decimal;
  padding-left: 24px;
  margin: 0 0 24px;
}
.article-content ol li {
  margin-bottom: 8px;
  padding-left: 6px;
}
.article-content img {
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin: 28px auto;
}
.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--bg-alt);
  padding: 18px 24px;
  border-radius: 0 10px 10px 0;
  margin: 28px 0;
  color: var(--muted);
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content a {
  color: var(--primary);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.article-content a:hover {
  border-bottom-color: var(--primary);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: #fff;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
}
.article-content th {
  background: var(--primary-light);
  color: var(--heading);
  font-weight: 600;
}
.article-content tr:nth-child(even) td {
  background: #FAFCFE;
}
.article-footer-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  margin-top: 48px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
}
.not-found {
  text-align: center;
  padding: 64px 32px;
  background: var(--bg-alt);
  border-radius: 16px;
}
.not-found i {
  font-size: 44px;
  color: var(--primary);
  margin-bottom: 16px;
}
.not-found h2 {
  font-size: 24px;
  color: var(--heading);
  margin-bottom: 10px;
}
.not-found p {
  color: var(--muted);
  margin-bottom: 28px;
  font-size: 15px;
}

.related-section {
  padding: 96px 0;
  background: var(--bg-alt);
}
.related-card {
  display: block;
  background: #fff;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  height: 100%;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card__img {
  height: 200px;
  overflow: hidden;
}
.related-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.related-card:hover .related-card__img img {
  transform: scale(1.06);
}
.related-card__body {
  padding: 24px 26px 28px;
}
.related-card__body .tag {
  margin-bottom: 14px;
}
.related-card__body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.45;
  margin-bottom: 10px;
  transition: color .2s ease;
}
.related-card:hover .related-card__body h3 {
  color: var(--primary);
}
.related-card__body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.feature-section {
  padding: 96px 0;
  background: #fff;
}
.feature-card {
  padding: 36px 30px;
  background: var(--bg-alt);
  border-radius: var(--radius-card);
  border: 1px solid transparent;
  transition: all .3s ease;
  height: 100%;
}
.feature-card:hover {
  background: #fff;
  border-color: var(--border);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}
.feature-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.faq-section {
  padding: 96px 0;
  background: var(--bg-alt);
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: box-shadow .25s ease;
}
.faq-item[open] {
  box-shadow: var(--shadow-card);
}
.faq-item summary {
  padding: 20px 26px;
  font-size: 17px;
  font-weight: 600;
  color: var(--heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  color: var(--primary);
  font-size: 14px;
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary i {
  transform: rotate(180deg);
}
.faq-item p {
  padding: 0 26px 22px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
}

.cta-section {
  padding: 96px 0;
  background: #fff;
}
.cta-card {
  background: var(--primary);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 42px rgba(62, 124, 177, 0.22);
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-card::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 30px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.cta-card__content {
  position: relative;
  z-index: 1;
}
.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.4;
}
.cta-card p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 32px;
  line-height: 1.8;
}

.footer {
  background: var(--heading);
  color: #A9B8C5;
  padding-top: 72px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}
.footer-brand .brand-core {
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #A9B8C5;
  margin: 16px 0 20px;
  max-width: 380px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 14px;
  transition: all .2s ease;
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
}
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-links li,
.footer-contact li {
  margin-bottom: 10px;
  font-size: 14px;
}
.footer-links a {
  color: #A9B8C5;
  transition: color .2s ease;
}
.footer-links a:hover {
  color: #fff;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact i {
  color: var(--primary-light);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 1023px) {
  .grid-container,
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
  .header-inner {
    padding: 0 24px;
  }
  .nav-link {
    padding: 8px 18px;
  }
  .feature-section,
  .related-section,
  .faq-section,
  .cta-section {
    padding: 72px 0;
  }
  .article-hero {
    padding: 110px 0 64px;
  }
  .article-hero__title {
    font-size: 32px;
  }
}

@media (max-width: 767px) {
  .header-inner {
    padding: 0 20px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: absolute;
    top: calc(var(--header-h) + 10px);
    left: 16px;
    right: 16px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    padding: 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 14px 14px;
    width: 100%;
    font-size: 16px;
  }
  .nav-link.active::after {
    left: 14px;
    transform: none;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    bottom: 8px;
  }
  .nav-cta {
    margin: 12px 8px 0;
    justify-content: center;
  }
  .article-hero {
    padding: 96px 0 52px;
    margin-top: calc(var(--header-h) - 1px);
  }
  .article-hero__title {
    font-size: 27px;
    margin-top: 16px;
  }
  .article-hero__meta {
    flex-direction: column;
    gap: 4px;
  }
  .article-main {
    padding: 48px 0 64px;
  }
  .related-section,
  .feature-section,
  .faq-section,
  .cta-section {
    padding: 56px 0;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .cta-card {
    padding: 48px 24px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
  .footer-bottom {
    font-size: 12px;
    padding: 18px 12px;
  }
}

@media (max-width: 520px) {
  .grid-container,
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .article-hero {
    padding: 84px 0 48px;
  }
  .article-hero__title {
    font-size: 23px;
  }
  .feature-card {
    padding: 28px 22px;
  }
  .related-card__body {
    padding: 20px;
  }
  .faq-item summary {
    padding: 18px 20px;
    font-size: 16px;
  }
  .faq-item p {
    padding: 0 20px 18px;
    font-size: 14px;
  }
  .brand-core {
    font-size: 18px;
  }
  .nav-cta {
    font-size: 14px;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
    --primary: #3E7CB1;
    --primary-hover: #356C9C;
    --primary-light: #EAF1F8;
    --accent: #C89B6D;
    --bg: #FFFFFF;
    --bg-alt: #F7F9FC;
    --text: #3D4F5F;
    --heading: #1A2C3B;
    --text-weak: #788895;
    --divider: rgba(30, 60, 90, 0.08);
    --radius-card: 12px;
    --radius-btn: 8px;
    --shadow: 0 4px 20px rgba(30,60,90,0.06);
    --shadow-hover: 0 8px 30px rgba(30,60,90,0.10);
    --space-section: 96px;
    --font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --container: 1140px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.25s ease;
}

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

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading);
    line-height: 1.3;
    font-weight: 650;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(62, 124, 177, 0.25);
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
    box-shadow: 0 6px 24px rgba(62, 124, 177, 0.35);
    transform: translateY(-2px);
}

.btn-primary:focus-visible {
    outline: 3px solid rgba(62, 124, 177, 0.4);
    outline-offset: 2px;
}

.btn-outline {
    border-color: rgba(62, 124, 177, 0.35);
    color: var(--primary);
    background: transparent;
}

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--divider);
    height: 76px;
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 6px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-core {
    font-size: 24px;
    font-weight: 700;
    color: var(--heading);
    letter-spacing: 0.5px;
    line-height: 1;
}

.brand-sub {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-weak);
    letter-spacing: 1px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    padding: 6px 2px;
    position: relative;
    line-height: 1.6;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -4px;
    width: 18px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    padding: 8px 18px;
    border: 1px solid rgba(62, 124, 177, 0.3);
    border-radius: 999px;
    transition: all 0.3s ease;
    background: transparent;
}

.nav-cta:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    font-size: 22px;
    color: var(--heading);
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

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

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(26, 44, 59, 0.78) 0%, rgba(51, 92, 128, 0.72) 60%, rgba(62, 124, 177, 0.62) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    padding: 120px 0 80px;
    color: #fff;
}

.hero-content {
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    padding: 6px 18px;
    font-size: 13px;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    color: #fff;
}

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

.hero h1 {
    font-size: 40px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 18px;
}

.hero h1 span {
    color: var(--accent);
}

.hero-desc {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 32px;
    max-width: 620px;
}

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

.hero .btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(200, 155, 109, 0.35);
}

.hero .btn-primary:hover {
    background: #b58a5e;
    box-shadow: 0 6px 28px rgba(200, 155, 109, 0.45);
}

.hero .btn-outline {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}

.hero .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
    color: #fff;
}

/* ===== Section 通用 ===== */
.section {
    padding: 96px 0;
}

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

.section-head {
    text-align: center;
    margin-bottom: 56px;
}

.section-head .eyebrow {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}

.section-head h2 {
    font-size: 28px;
    font-weight: 650;
    line-height: 1.4;
    margin-bottom: 14px;
}

.section-head p {
    font-size: 16px;
    color: var(--text-weak);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== 权益卡片 ===== */
.benefits-grid .columns {
    margin-bottom: 24px;
}

.benefit-card {
    background: var(--bg);
    border-radius: var(--radius-card);
    padding: 28px;
    box-shadow: var(--shadow);
    height: 100%;
    transition: all 0.35s ease;
    position: relative;
    border: 1px solid rgba(30, 60, 90, 0.04);
}

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

.benefit-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 24px;
}

.benefit-card h3 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--heading);
}

.benefit-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 0;
}

/* ===== 流程 ===== */
.process-section {
    padding: 96px 0;
}

.process-img {
    border-radius: var(--radius-card);
    box-shadow: var(--shadow);
    overflow: hidden;
    height: 100%;
    min-height: 320px;
    object-fit: cover;
    width: 100%;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.step-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--divider);
    position: relative;
}

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

.step-num {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.step-content h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--heading);
}

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

/* ===== 推荐内容 ===== */
.recommend-card {
    background: var(--bg);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow);
    height: 100%;
    transition: all 0.35s ease;
    display: flex;
    flex-direction: column;
}

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

.recommend-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
}

.recommend-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.recommend-card:hover .recommend-thumb img {
    transform: scale(1.04);
}

.recommend-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(26, 44, 59, 0.75);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 999px;
    letter-spacing: 0.5px;
}

.recommend-body {
    padding: 20px 24px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.recommend-body h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--heading);
    line-height: 1.4;
}

.recommend-body p {
    font-size: 14px;
    color: var(--text);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 14px;
}

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

.recommend-more:hover {
    gap: 10px;
}

/* ===== 会员方案 ===== */
.plans-grid .columns {
    margin-bottom: 24px;
}

.plan-card {
    background: var(--bg);
    border-radius: var(--radius-card);
    padding: 32px 28px;
    box-shadow: var(--shadow);
    height: 100%;
    transition: all 0.35s ease;
    border: 1px solid rgba(30, 60, 90, 0.04);
    position: relative;
}

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

.plan-card.featured {
    border: 2px solid var(--primary);
}

.plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 999px;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.plan-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 6px;
}

.plan-price {
    font-size: 40px;
    font-weight: 200;
    color: var(--primary);
    margin: 16px 0 20px;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.plan-price .unit {
    font-size: 14px;
    color: var(--text-weak);
    font-weight: 400;
}

.plan-feats {
    margin-bottom: 24px;
}

.plan-feats li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 7px 0;
    font-size: 14px;
    color: var(--text);
}

.plan-feats li i {
    color: var(--primary);
    margin-top: 6px;
    font-size: 12px;
}

.plan-feats li.off i {
    color: #c0c8d0;
}

.plan-feats li.off span {
    color: var(--text-weak);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg);
    border-radius: 12px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(30, 60, 90, 0.04);
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.faq-item:hover {
    box-shadow: var(--shadow-hover);
}

.faq-item details {
    padding: 0;
}

.faq-item summary {
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--heading);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    list-style: none;
    transition: color 0.2s;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 14px;
    color: var(--primary);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item details[open] summary::after {
    transform: rotate(180deg);
}

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

.faq-answer {
    padding: 0 28px 24px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
}

/* ===== CTA ===== */
.cta-section {
    padding: 96px 0;
    background: linear-gradient(135deg, rgba(26, 44, 59, 0.82), rgba(62, 124, 177, 0.68)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    text-align: center;
    color: #fff;
}

.cta-section h2 {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    line-height: 1.3;
}

.cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(200, 155, 109, 0.4);
}

.cta-section .btn-primary:hover {
    background: #b58a5e;
    box-shadow: 0 6px 32px rgba(200, 155, 109, 0.5);
}

.cta-section .btn-outline {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border-color: #fff;
}

/* ===== Footer ===== */
.footer {
    background: #F7F9FC;
    border-top: 1px solid var(--divider);
    padding: 64px 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--heading);
    margin-bottom: 12px;
}

.footer-brand .brand-core {
    font-size: 20px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 16px;
    max-width: 360px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg);
    border: 1px solid var(--divider);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-weak);
    font-size: 15px;
    transition: all 0.3s;
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 16px;
}

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

.footer-links a {
    font-size: 14px;
    color: var(--text);
    transition: color 0.2s, padding-left 0.2s;
}

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

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text);
    margin-bottom: 12px;
}

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

.footer-bottom {
    border-top: 1px solid var(--divider);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-weak);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
    .hero {
        min-height: 500px;
        padding: 100px 0 60px;
    }
    .hero h1 {
        font-size: 34px;
    }
    .section {
        padding: 64px 0;
    }
    .process-section {
        padding: 64px 0;
    }
    .cta-section {
        padding: 64px 0;
    }
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 767px) {
    .header {
        height: 64px;
    }
    .header-inner {
        height: 64px;
        padding: 0 16px;
    }
    .brand-core {
        font-size: 22px;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
        border-bottom: 1px solid var(--divider);
        box-shadow: 0 12px 30px rgba(30, 60, 90, 0.12);
    }
    .main-nav.open {
        max-height: 420px;
    }
    .nav-link {
        width: 100%;
        padding: 14px 20px;
        border-top: 1px solid rgba(30, 60, 90, 0.05);
        font-size: 16px;
    }
    .nav-link.active::after {
        left: 20px;
        transform: none;
        bottom: auto;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        top: 50%;
        transform: translateY(-50%);
    }
    .nav-cta {
        margin: 16px 20px 20px;
        justify-content: center;
    }
    .nav-toggle {
        display: block;
    }
    .hero {
        min-height: 480px;
        padding: 96px 0 48px;
    }
    .hero h1 {
        font-size: 28px;
    }
    .hero-desc {
        font-size: 15px;
        margin-bottom: 24px;
    }
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    .hero-buttons .btn {
        width: 100%;
    }
    .section-head h2 {
        font-size: 24px;
    }
    .section-head p {
        font-size: 15px;
    }
    .process-img {
        min-height: 200px;
        margin-bottom: 24px;
    }
    .plan-price {
        font-size: 32px;
    }
    .cta-section h2 {
        font-size: 26px;
    }
    .cta-buttons {
        flex-direction: column;
    }
    .cta-buttons .btn {
        width: 100%;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .section {
        padding: 48px 0;
    }
    .process-section {
        padding: 48px 0;
    }
    .cta-section {
        padding: 48px 0;
    }
}

@media (max-width: 520px) {
    .hero {
        min-height: 440px;
    }
    .hero h1 {
        font-size: 24px;
    }
    .benefit-card {
        padding: 20px;
    }
    .faq-item summary {
        font-size: 15px;
        padding: 18px 20px;
    }
    .faq-answer {
        padding: 0 20px 18px;
        font-size: 14px;
    }
}