/* roulang page: index */
/* ===== design variables ===== */
:root {
  --primary: #2B7CD3;
  --primary-dark: #1E6AB8;
  --primary-light: #E8F1FA;
  --accent: #12A5A0;
  --accent-hover: #21C7C0;
  --bg: #F7F9FC;
  --card-bg: #FFFFFF;
  --dark-bg: #112B47;
  --text: #3D5167;
  --heading: #16293D;
  --muted: #8494A7;
  --border: #E5EBF1;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(27, 91, 156, 0.08);
  --shadow-hover: 0 16px 40px rgba(27, 91, 156, 0.14);
  --transition: 0.3s ease;
  --container-width: 1200px;
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: var(--font);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  font-weight: 700;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}

p {
  margin-bottom: 1rem;
}

/* ===== container ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  font-variant-numeric: tabular-nums;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(43, 124, 211, 0.3);
}

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

.btn-accent:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(18, 165, 160, 0.25);
}

.btn-accent:active {
  transform: translateY(1px);
  box-shadow: none;
}

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

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(43, 124, 211, 0.15);
}

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

.btn-sm {
  padding: 10px 24px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

/* ===== header / nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(43, 124, 211, 0.25);
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 16px;
  font-weight: 700;
  color: var(--heading);
  margin-left: 2px;
}

.main-nav ul {
  display: flex;
  gap: 8px;
}

.main-nav li a {
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
  transition: all 0.3s ease;
}

.main-nav li a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

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

.main-nav li.active a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.hamburger:hover {
  background: #d5e5f5;
}

/* mobile drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(320px, 85vw);
  height: 100vh;
  background: #fff;
  z-index: 200;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
  transition: right 0.35s ease;
  display: flex;
  flex-direction: column;
  padding: 32px 24px;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 43, 71, 0.5);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer .drawer-close {
  align-self: flex-end;
  font-size: 22px;
  color: var(--text);
  padding: 8px;
  margin-bottom: 8px;
}

.mobile-drawer ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.mobile-drawer ul li a {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.mobile-drawer ul li a:hover,
.mobile-drawer ul li.active a {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-drawer .btn {
  margin-top: 16px;
  width: 100%;
}

/* ===== hero ===== */
.hero {
  background: linear-gradient(135deg, #F0F6FC, #F7F9FC 50%, #E8F0F8);
  position: relative;
  overflow: hidden;
  padding: 80px 0 96px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(43, 124, 211, 0.06);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-text {
  flex: 7;
}

.hero-image {
  flex: 5;
}

.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--heading);
  margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 440px;
  line-height: 1.7;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-note {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(27, 91, 156, 0.18);
}

.hero-img-wrap img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.hero-img-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.hero-img-badge .badge-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}

.hero-img-badge .badge-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--heading);
}

.hero-img-badge .badge-text span {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
}

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

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

.section-header h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--heading);
  margin-bottom: 12px;
}

.section-header .section-sub {
  font-size: 14px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto;
}

.section-header-left {
  text-align: left;
  margin-bottom: 40px;
}

.section-header-left h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--heading);
  margin-bottom: 8px;
}

.section-header-left .section-sub {
  font-size: 14px;
  color: var(--muted);
}

/* ===== feature cards ===== */
.features {
  background: #fff;
}

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

.feature-card {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary-light), #e3f0f9);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 26px;
  color: var(--primary);
  transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.08);
  background: var(--primary);
  color: #fff;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== carousel section ===== */
.carousel-section {
  background: var(--bg);
  overflow: hidden;
}

.carousel-wrapper {
  position: relative;
  margin: 0 -4%;
  padding: 0 4%;
}

.carousel-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s ease;
  will-change: transform;
}

.carousel-card {
  flex: 0 0 calc(33.333% - 16px);
  max-width: calc(33.333% - 16px);
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.carousel-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 12px 12px 0 0;
}

.carousel-card-body {
  padding: 16px 20px 20px;
}

.carousel-card-body h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 4px;
}

.carousel-card-body p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
}

.carousel-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--primary);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

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

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d0dae4;
  transition: all 0.3s ease;
  cursor: pointer;
}

.carousel-dot.active {
  background: var(--primary);
  width: 28px;
  border-radius: 4px;
}

/* ===== requirements ===== */
.requirements {
  background: #fff;
}

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

.req-left h3,
.req-right h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.req-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.req-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.req-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}

.req-item-text .req-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.4;
}

.req-item-text .req-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 2px;
}

.req-right .badge-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 32px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.compat-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: #fff;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--heading);
  transition: all 0.3s ease;
}

.compat-badge i {
  color: var(--primary);
}

.compat-badge:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== reviews ===== */
.reviews {
  background: var(--bg);
}

.review-summary {
  text-align: center;
  margin-bottom: 48px;
}

.review-score {
  font-size: 36px;
  font-weight: 800;
  color: var(--heading);
  font-variant-numeric: tabular-nums;
}

.review-stars {
  color: #F59E0B;
  font-size: 18px;
  margin: 8px 0;
  letter-spacing: 4px;
}

.review-total {
  font-size: 13px;
  color: var(--muted);
}

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

.review-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.review-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.review-card .stars {
  color: #F59E0B;
  font-size: 16px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-card blockquote {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.review-user-info .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.3;
}

.review-user-info .source {
  font-size: 12px;
  color: var(--muted);
}

/* ===== news ===== */
.news {
  background: #fff;
}

.news-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.news-header-row .view-all {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s ease;
}

.news-header-row .view-all:hover {
  color: var(--primary-dark);
  gap: 10px;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.news-item {
  display: flex;
  gap: 20px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.news-item:hover {
  background: #F0F6FC;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.news-thumb {
  flex: 0 0 160px;
  max-width: 160px;
}

.news-thumb img {
  width: 160px;
  height: 110px;
  object-fit: cover;
  border-radius: 10px;
}

.news-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
}

.news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.4;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-title a {
  color: inherit;
}

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

.news-excerpt {
  font-size: 14px;
  color: #5A6B7F;
  line-height: 1.6;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}

.news-badge {
  padding: 3px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.news-more {
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.3s ease;
}

.news-more:hover {
  gap: 8px;
}

.news-empty {
  text-align: center;
  padding: 48px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  color: var(--muted);
  font-size: 14px;
}

/* ===== faq ===== */
.faq-section {
  background: var(--bg);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 124, 211, 0.08);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  transition: all 0.3s ease;
}

.faq-item.open .faq-question {
  color: var(--primary);
}

.faq-q-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  font-weight: 700;
}

.faq-toggle {
  margin-left: auto;
  font-size: 18px;
  color: var(--muted);
  transition: transform 0.3s ease;
  font-weight: 400;
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  padding: 0 24px 20px 66px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  padding-top: 14px;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== cta ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #155E9E 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: -120px;
  right: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  color: #fff;
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-inner .cta-sub {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin-bottom: 32px;
}

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

.cta-section .btn-accent {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
}

.cta-section .btn-accent:hover {
  background: var(--primary-light);
  border-color: var(--primary-light);
  color: var(--primary-dark);
}

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

.cta-section .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
}

/* ===== footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand .logo-sub {
  color: rgba(255, 255, 255, 0.8);
}

.footer-brand .logo-icon {
  background: var(--primary);
}

.footer-brand-desc {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 20px;
}

.social-icons {
  display: flex;
  gap: 10px;
}

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}

.social-icon:hover {
  background: var(--accent);
  color: #fff;
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: all 0.3s ease;
}

.footer-col ul li a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-contact p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
}

/* ===== responsive ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .carousel-card {
    flex: 0 0 calc(50% - 12px);
    max-width: calc(50% - 12px);
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-img-wrap img {
    height: 380px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 56px 0;
  }

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

  .hero-text {
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-btns {
    justify-content: center;
  }

  .hero-note {
    justify-content: center;
  }

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

  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header-actions .btn {
    display: none;
  }

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

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

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

  .news-thumb,
  .news-thumb img {
    width: 100%;
    max-width: 100%;
    height: 160px;
  }

  .news-meta {
    flex-wrap: wrap;
  }

  .news-more {
    margin-left: 0;
  }

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

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

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

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

  .carousel-card {
    flex: 0 0 100%;
    max-width: 100%;
  }

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

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

  .hero h1 {
    font-size: 28px;
  }

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

  .faq-question {
    font-size: 14px;
    padding: 16px;
  }

  .faq-answer {
    padding-left: 16px;
  }
}

/* ===== focus states ===== */
a:focus-visible,
button:focus-visible,
.faq-question:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(43, 124, 211, 0.3);
  border-radius: 4px;
}

/* ===== animation ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-up {
  animation: fadeInUp 0.6s ease both;
}

/* roulang page: category1 */
:root {
      --primary: #2B7CD3;
      --primary-dark: #1E6AB8;
      --primary-light: #E8F1FA;
      --accent: #12A5A0;
      --accent-hover: #21C7C0;
      --accent-light: #E6F7F6;
      --bg: #F7F9FC;
      --card: #FFFFFF;
      --dark: #112B47;
      --heading: #16293D;
      --body: #3D5167;
      --muted: #8494A7;
      --border: #E5EBF1;
      --radius-card: 16px;
      --radius-btn: 999px;
      --radius-badge: 8px;
      --shadow-card: 0 8px 32px rgba(27, 91, 156, 0.08);
      --shadow-hover: 0 16px 40px rgba(27, 91, 156, 0.14);
      --transition: 0.3s ease;
      --font: system-ui, -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);
      background: var(--bg);
      color: var(--body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    ul {
      list-style: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== 导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow var(--transition);
    }

    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }

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

    .logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 12px rgba(43, 124, 211, 0.25);
    }

    .logo-text {
      font-size: 22px;
      font-weight: 800;
      color: var(--heading);
      line-height: 1.2;
    }

    .logo-text .logo-sub {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      margin-left: 2px;
    }

    .main-nav ul {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .main-nav a {
      display: inline-block;
      font-size: 15px;
      font-weight: 500;
      color: var(--body);
      padding: 8px 0;
      position: relative;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }

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

    .main-nav li.active a {
      color: var(--primary);
      border-bottom-color: var(--primary);
      font-weight: 600;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn-download-nav {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
      box-shadow: 0 4px 16px rgba(18, 165, 160, 0.25);
    }

    .btn-download-nav:hover {
      filter: brightness(1.08);
      transform: translateY(-2px);
      color: #fff;
      box-shadow: 0 8px 24px rgba(18, 165, 160, 0.35);
    }

    .btn-download-nav:active {
      transform: translateY(-1px);
    }

    .hamburger {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--border);
      background: var(--card);
      border-radius: 12px;
      font-size: 18px;
      color: var(--heading);
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: all var(--transition);
    }

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

    .mobile-drawer {
      display: none;
      position: fixed;
      top: 0;
      right: -100%;
      width: 300px;
      height: 100%;
      background: #fff;
      z-index: 200;
      padding: 24px;
      border-radius: 16px 0 0 16px;
      box-shadow: -8px 0 40px rgba(0, 0, 0, 0.1);
      transition: right var(--transition);
    }

    .mobile-drawer.open {
      right: 0;
    }

    .drawer-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(22, 41, 61, 0.5);
      z-index: 199;
      opacity: 0;
      transition: opacity var(--transition);
    }

    .drawer-overlay.open {
      display: block;
      opacity: 1;
    }

    .mobile-drawer .drawer-menu li a {
      display: block;
      padding: 12px 0;
      font-size: 16px;
      font-weight: 500;
      color: var(--heading);
      border-bottom: 1px solid var(--border);
    }

    .mobile-drawer .drawer-menu li.active a {
      color: var(--primary);
    }

    .mobile-drawer .drawer-btn {
      margin-top: 24px;
      width: 100%;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      font-weight: 600;
      padding: 14px 32px;
      cursor: pointer;
      border: none;
      transition: all var(--transition);
      line-height: 1.4;
    }

    .btn-primary {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 6px 20px rgba(18, 165, 160, 0.3);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(18, 165, 160, 0.35);
    }

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

    .btn-outline {
      background: #fff;
      color: var(--primary);
      border: 2px solid var(--primary);
    }

    .btn-outline:hover {
      background: #F0F6FC;
      color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(43, 124, 211, 0.15);
    }

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

    .btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(43, 124, 211, 0.3);
    }

    /* ===== Hero ===== */
    .category-hero {
      background: linear-gradient(135deg, #F0F6FC, #F7F9FC 50%, #E8F0F8);
      padding: 72px 0 64px;
      position: relative;
      overflow: hidden;
    }

    .category-hero::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 360px;
      height: 360px;
      background: rgba(43, 124, 211, 0.06);
      border-radius: 50%;
      pointer-events: none;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 28px;
      flex-wrap: wrap;
    }

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

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

    .breadcrumb .sep {
      color: #B8C4D0;
    }

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

    .hero-content {
      max-width: 820px;
    }

    .hero-content .category-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent-light);
      color: var(--accent);
      font-size: 14px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: var(--radius-badge);
      margin-bottom: 20px;
    }

    .category-hero h1 {
      font-size: 40px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--heading);
      margin-bottom: 16px;
    }

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

    .hero-desc {
      font-size: 16px;
      color: var(--body);
      max-width: 640px;
      margin-bottom: 28px;
      line-height: 1.8;
    }

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

    .hero-note {
      margin-top: 16px;
      font-size: 12px;
      color: var(--muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }

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

    .section-alt {
      background: #fff;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }

    .section-header h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--heading);
      line-height: 1.4;
      margin-bottom: 12px;
    }

    .section-header p {
      font-size: 15px;
      color: var(--muted);
      line-height: 1.7;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      padding: 6px 16px;
      border-radius: var(--radius-badge);
      margin-bottom: 16px;
    }

    /* ===== 图文交错 ===== */
    .split-block {
      padding: 80px 0;
    }

    .split-block-alt {
      background: #fff;
    }

    .split-grid {
      display: flex;
      align-items: center;
      gap: 64px;
    }

    .split-grid.reverse .split-grid {
      flex-direction: row-reverse;
    }

    .split-image {
      flex: 0 0 48%;
      position: relative;
    }

    .split-image .img-wrap {
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      aspect-ratio: 4/3;
    }

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

    .split-image:hover img {
      transform: scale(1.03);
    }

    .split-image::after {
      content: '';
      position: absolute;
      bottom: -16px;
      right: -16px;
      width: 120px;
      height: 120px;
      border: 4px solid var(--primary-light);
      border-radius: 20px;
      z-index: -1;
    }

    .split-text {
      flex: 1;
    }

    .split-text .step-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      padding: 6px 16px;
      border-radius: var(--radius-badge);
      margin-bottom: 16px;
    }

    .split-text h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--heading);
      line-height: 1.4;
      margin-bottom: 16px;
    }

    .split-text p {
      font-size: 15px;
      color: var(--body);
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .feature-list {
      margin-top: 16px;
    }

    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 8px 0;
      font-size: 15px;
      color: var(--body);
    }

    .feature-list li i {
      color: var(--accent);
      margin-top: 4px;
      font-size: 14px;
      width: 20px;
      text-align: center;
      background: var(--accent-light);
      border-radius: 50%;
      width: 22px;
      height: 22px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    /* ===== 适用场景 ===== */
    .scenario-section {
      background: var(--bg);
      padding: 96px 0;
    }

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

    .scenario-card {
      background: var(--card);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border: 1px solid transparent;
      transition: all var(--transition);
    }

    .scenario-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--primary-light);
    }

    .scenario-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
    }

    .scenario-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--heading);
      margin-bottom: 12px;
    }

    .scenario-card p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
    }

    /* ===== 流程 ===== */
    .process-section {
      background: var(--dark);
      padding: 96px 0;
      position: relative;
      overflow: hidden;
    }

    .process-section::before {
      content: '';
      position: absolute;
      bottom: -120px;
      right: -80px;
      width: 320px;
      height: 320px;
      background: rgba(43, 124, 211, 0.2);
      border-radius: 50%;
    }

    .process-section .section-header h2 {
      color: #fff;
    }

    .process-section .section-header p {
      color: rgba(255, 255, 255, 0.7);
    }

    .process-section .section-kicker {
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      z-index: 1;
    }

    .process-step {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      backdrop-filter: blur(4px);
      transition: all var(--transition);
    }

    .process-step:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-4px);
    }

    .process-num {
      font-size: 36px;
      font-weight: 800;
      color: var(--accent);
      font-variant-numeric: tabular-nums;
      margin-bottom: 8px;
      display: block;
    }

    .process-step h3 {
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.6);
      line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 96px 0;
      background: #fff;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color var(--transition), box-shadow var(--transition);
    }

    .faq-item:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--heading);
      user-select: none;
    }

    .faq-question .q-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      flex-shrink: 0;
    }

    .faq-question .q-toggle {
      margin-left: auto;
      font-size: 18px;
      color: var(--muted);
      transition: transform var(--transition), color var(--transition);
      flex-shrink: 0;
    }

    .faq-item.active .faq-question {
      color: var(--primary);
    }

    .faq-item.active .q-toggle {
      transform: rotate(45deg);
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-answer p {
      padding: 0 24px 20px 68px;
      font-size: 14px;
      color: var(--body);
      line-height: 1.8;
      border-top: 1px dashed var(--border);
      margin-top: 4px;
      padding-top: 16px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 88px 0;
      background: linear-gradient(135deg, var(--primary), var(--dark));
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -60px;
      width: 280px;
      height: 280px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      bottom: -80px;
      left: -40px;
      width: 220px;
      height: 220px;
      background: rgba(18, 165, 160, 0.2);
      border-radius: 50%;
    }

    .cta-inner {
      position: relative;
      z-index: 1;
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.4;
    }

    .cta-inner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.8);
      margin-bottom: 32px;
      line-height: 1.8;
    }

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

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

    .cta-btns .btn-primary:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
    }

    .cta-btns .btn-outline {
      border-color: #fff;
      color: #fff;
      background: transparent;
    }

    .cta-btns .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--dark);
      padding: 64px 0 0;
      color: rgba(255, 255, 255, 0.7);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .logo-text {
      color: #fff;
    }

    .footer-brand .logo-text .logo-sub {
      color: var(--accent);
    }

    .footer-brand-desc {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.6);
      margin: 16px 0 20px;
      line-height: 1.8;
      max-width: 320px;
    }

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

    .social-icon {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.08);
      color: rgba(255, 255, 255, 0.8);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      transition: all var(--transition);
    }

    .social-icon:hover {
      background: var(--accent);
      color: #fff;
      transform: translateY(-2px);
    }

    .footer-title {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 20px;
    }

    .footer-col ul li {
      margin-bottom: 12px;
    }

    .footer-col ul li a {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
      transition: color var(--transition);
    }

    .footer-col ul li a:hover {
      color: #fff;
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .footer-contact p {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

    .footer-bottom {
      padding: 24px 0;
      text-align: center;
      font-size: 12px;
      color: rgba(255, 255, 255, 0.5);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .main-nav {
        display: none;
      }

      .hamburger {
        display: flex;
      }

      .split-grid {
        gap: 40px;
      }

      .split-image {
        flex: 0 0 45%;
      }

      .scenario-grid {
        gap: 16px;
      }

      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      .section {
        padding: 72px 0;
      }

      .split-block {
        padding: 56px 0;
      }

      .split-grid {
        flex-direction: column;
      }

      .split-grid.reverse {
        flex-direction: column;
      }

      .split-image {
        flex: 1 1 auto;
        width: 100%;
      }

      .split-image::after {
        display: none;
      }

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

      .category-hero h1 {
        font-size: 32px;
      }

      .hero-btns .btn {
        width: 100%;
        justify-content: center;
      }

      .section-header h2 {
        font-size: 26px;
      }

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

      .process-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }

      .faq-question {
        padding: 16px 20px;
        font-size: 15px;
      }

      .faq-answer p {
        padding: 14px 20px 16px 56px;
      }

      .cta-inner h2 {
        font-size: 26px;
      }

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

      .footer-brand-desc {
        max-width: 100%;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

      .header-inner {
        height: 64px;
      }

      .logo-text {
        font-size: 20px;
      }

      .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
      }

      .btn-download-nav {
        display: none;
      }

      .category-hero h1 {
        font-size: 28px;
      }

      .hero-note {
        font-size: 11px;
        align-items: flex-start;
      }

      .split-text h2 {
        font-size: 24px;
      }

      .cta-btns .btn {
        width: 100%;
        justify-content: center;
      }

      .social-icons {
        flex-wrap: wrap;
      }
    }

/* roulang page: article */
:root {
  --primary: #2B7CD3;
  --primary-dark: #1E6AB8;
  --primary-light: #E8F1FA;
  --accent: #12A5A0;
  --accent-hover: #21C7C0;
  --bg-page: #F7F9FC;
  --bg-card: #FFFFFF;
  --bg-dark: #112B47;
  --text-body: #3D5167;
  --text-title: #16293D;
  --text-muted: #8494A7;
  --border: #E5EBF1;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-btn: 999px;
  --shadow: 0 8px 32px rgba(27, 91, 156, 0.08);
  --shadow-hover: 0 16px 40px rgba(27, 91, 156, 0.14);
  --transition: 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px; line-height: 1.8; color: var(--text-body);
  background: var(--bg-page); -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; object-fit: cover; }
a { color: var(--primary); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--primary-dark); }
p { margin-bottom: 1rem; }
ul, ol { margin: 0 0 1rem 1.25rem; }
h1, h2, h3, h4, h5, h6 { color: var(--text-title); line-height: 1.4; font-weight: 700; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(43,124,211,0.3); border-radius: 4px; }
::selection { background: var(--primary-light); color: var(--primary-dark); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; position: relative; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px;
  box-shadow: 0 4px 12px rgba(43,124,211,0.25);
}
.logo-text { font-size: 22px; font-weight: 800; color: var(--text-title); letter-spacing: -0.02em; }
.logo-sub { color: var(--primary); }
.main-nav { display: flex; align-items: center; }
.main-nav ul { display: flex; list-style: none; margin: 0; padding: 0; gap: 4px; }
.main-nav a {
  display: block; padding: 10px 16px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--text-body);
  text-decoration: none; position: relative;
  transition: all var(--transition);
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav li.active a { color: var(--primary); font-weight: 600; }
.main-nav li.active a::after {
  content: ''; position: absolute; left: 16px; right: 16px; bottom: 4px;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.header-cta { margin-left: 12px; flex-shrink: 0; }
.mobile-cta { display: none; }
.nav-toggle {
  display: none; width: 44px; height: 44px; border: none; background: transparent;
  border-radius: var(--radius-sm); font-size: 20px; color: var(--text-title);
  cursor: pointer; align-items: center; justify-content: center;
  transition: background 0.3s ease; flex-shrink: 0;
}
.nav-toggle:hover { background: var(--primary-light); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-btn);
  font-size: 16px; font-weight: 600; font-family: inherit;
  border: none; cursor: pointer; text-decoration: none;
  transition: all var(--transition);
  line-height: 1; white-space: nowrap;
}
.btn i { font-size: 15px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(18,165,160,0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: #fff; color: var(--primary); border: 2px solid var(--primary); }
.btn-secondary:hover { background: #F0F6FC; color: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }
.btn-sm { padding: 10px 22px; font-size: 14px; }

/* Breadcrumb */
.breadcrumb { padding: 28px 0 8px; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: #C5CED9; }
.breadcrumb .current { color: var(--text-body); }

/* Article */
.article-section { padding: 16px 0 40px; }
.article-card {
  background: var(--bg-card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 48px 56px;
  border: 1px solid rgba(229,235,241,0.6);
}
.article-content { max-width: 780px; margin: 0 auto; }
.article-title { font-size: 36px; font-weight: 800; color: var(--text-title); line-height: 1.3; margin-bottom: 20px; letter-spacing: -0.02em; }
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 20px;
  padding-bottom: 24px; border-bottom: 1px solid var(--border); margin-bottom: 32px;
}
.meta-item { font-size: 13px; color: var(--text-muted); display: inline-flex; align-items: center; gap: 6px; font-variant-numeric: tabular-nums; }
.meta-item i { color: var(--primary); font-size: 14px; }
.article-text { font-size: 16px; line-height: 1.85; color: var(--text-body); }
.article-text p { margin-bottom: 1.25rem; }
.article-text h2 { font-size: 24px; font-weight: 700; color: var(--text-title); margin: 40px 0 16px; padding-top: 8px; }
.article-text h3 { font-size: 19px; font-weight: 600; color: var(--text-title); margin: 32px 0 12px; }
.article-text h4 { font-size: 17px; font-weight: 600; color: var(--text-title); margin: 28px 0 10px; }
.article-text a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-text a:hover { color: var(--primary-dark); }
.article-text ul, .article-text ol { margin: 16px 0 20px 24px; }
.article-text li { margin-bottom: 8px; }
.article-text img { border-radius: 12px; margin: 28px auto; box-shadow: var(--shadow); }
.article-text blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 24px;
  border-radius: 0 12px 12px 0;
  margin: 28px 0; color: var(--text-body); font-style: normal;
}
.article-text blockquote p:last-child { margin-bottom: 0; }
.article-text pre {
  background: var(--bg-dark); color: #E6F0FA;
  padding: 20px 24px; border-radius: 12px;
  overflow-x: auto; font-size: 14px; line-height: 1.7;
  margin: 24px 0;
}
.article-text code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.9em; background: var(--primary-light); padding: 2px 6px; border-radius: 4px; }
.article-text pre code { background: transparent; padding: 0; color: inherit; }
.article-text table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-text th, .article-text td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; font-size: 14px; }
.article-text th { background: var(--primary-light); font-weight: 600; color: var(--text-title); }

/* Empty state */
.article-empty { text-align: center; padding: 60px 20px; }
.article-empty .empty-icon { font-size: 48px; color: var(--text-muted); margin-bottom: 20px; }
.article-empty h2 { font-size: 28px; margin-bottom: 12px; }
.article-empty p { color: var(--text-muted); margin-bottom: 28px; }

/* Pagination */
.pagination-section { padding: 24px 0 8px; }
.pagination-card {
  display: flex; flex-direction: column; justify-content: center;
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border); padding: 22px 28px;
  min-height: 96px; text-decoration: none;
  transition: all var(--transition);
  height: 100%;
}
.pagination-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); text-decoration: none; }
.pagination-label { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.pagination-title { font-size: 16px; font-weight: 600; color: var(--text-title); line-height: 1.5; }
.pagination-card.next { text-align: right; }
.pagination-card.next .pagination-label { justify-content: flex-end; }

/* Related */
.related-section { padding: 40px 0 16px; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.section-title { font-size: 28px; font-weight: 800; color: var(--text-title); margin: 0; letter-spacing: -0.02em; }
.section-sub { font-size: 14px; color: var(--text-muted); }
.related-card {
  background: var(--bg-card); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  transition: all var(--transition);
  display: flex; flex-direction: column; height: 100%;
  text-decoration: none; border: 1px solid rgba(229,235,241,0.5);
}
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); text-decoration: none; }
.related-thumb { overflow: hidden; position: relative; padding-top: 56.25%; }
.related-thumb img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.related-tag {
  align-self: flex-start; font-size: 12px; font-weight: 600; color: var(--primary);
  background: var(--primary-light); padding: 4px 12px; border-radius: 999px;
  margin-bottom: 12px;
}
.related-title { font-size: 17px; font-weight: 700; color: var(--text-title); line-height: 1.5; margin-bottom: 10px; }
.related-desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-link { font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.related-link i { transition: transform 0.3s ease; }
.related-card:hover .related-link i { transform: translateX(4px); }

/* CTA */
.article-cta-section { padding: 40px 0 80px; }
.cta-box {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
  border-radius: 20px; padding: 44px 52px; color: #fff;
  position: relative; overflow: hidden;
}
.cta-box::before {
  content: ''; position: absolute; width: 200px; height: 200px; border-radius: 50%;
  background: rgba(255,255,255,0.06); top: -80px; right: -40px;
}
.cta-box h3 { font-size: 26px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.cta-box p { font-size: 15px; color: rgba(255,255,255,0.8); margin: 0; }
.cta-actions { display: flex; gap: 16px; flex-shrink: 0; position: relative; z-index: 1; }
.btn-accent {
  background: var(--accent); color: #fff; border: none;
}
.btn-accent:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(18,165,160,0.35); }
.btn-white {
  background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6);
}
.btn-white:hover { background: rgba(255,255,255,0.12); color: #fff; border-color: #fff; }

/* Footer */
.site-footer { background: var(--bg-dark); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-icon { background: linear-gradient(135deg, var(--primary), var(--accent)); }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-sub { color: var(--accent); }
.footer-brand-desc { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.8; margin-top: 12px; }
.social-icons { display: flex; gap: 12px; margin-top: 20px; }
.social-icon {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.1); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; transition: all var(--transition); text-decoration: none;
}
.social-icon:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,0.65); font-size: 14px; text-decoration: none; transition: all 0.3s ease; }
.footer-col a:hover { color: #fff; padding-left: 2px; }
.footer-contact p { font-size: 13px; color: rgba(255,255,255,0.65); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 24px 0; margin-top: 16px; }
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.45); margin: 0; text-align: center; }

/* Responsive */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .cta-box { padding: 36px 32px; }
}

@media (max-width: 768px) {
  .header-inner { height: 64px; }
  .nav-toggle { display: inline-flex; }
  .main-nav {
    display: none;
    position: absolute; top: 64px; left: -24px; right: -24px;
    background: #fff; padding: 20px 24px 28px;
    box-shadow: 0 12px 32px rgba(0,0,0,0.1);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; margin-bottom: 12px; }
  .main-nav a { padding: 14px 16px; font-size: 16px; }
  .main-nav li.active a::after { display: none; }
  .header-cta { display: none; }
  .mobile-cta { display: inline-flex; width: 100%; justify-content: center; margin-top: 8px; }
  .article-card { padding: 32px 24px; border-radius: 16px; }
  .article-title { font-size: 28px; }
  .article-meta { gap: 12px; }
  .meta-item { font-size: 12px; }
  .cta-box { flex-direction: column; text-align: center; padding: 36px 24px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .related-section { padding-top: 24px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .breadcrumb { padding-top: 20px; }
  .article-card { padding: 24px 18px; }
  .article-title { font-size: 24px; line-height: 1.4; }
  .article-text { font-size: 15px; }
  .article-text h2 { font-size: 21px; }
  .section-title { font-size: 24px; }
  .pagination-card { padding: 16px 20px; min-height: 84px; }
  .pagination-card.next { text-align: left; }
  .pagination-card.next .pagination-label { justify-content: flex-start; }
}

/* Utility */
.fade-up { animation: fadeUp 0.6s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: category2 */
:root {
      --primary: #2B7CD3;
      --primary-dark: #1E6AB8;
      --primary-light: #E8F1FA;
      --teal: #12A5A0;
      --teal-hover: #21C7C0;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --dark: #112B47;
      --text-body: #3D5167;
      --text-heading: #16293D;
      --text-muted: #8494A7;
      --text-secondary: #5A6B7F;
      --border: #E5EBF1;
      --radius: 16px;
      --radius-sm: 8px;
      --shadow: 0 8px 32px rgba(27, 91, 156, 0.08);
      --shadow-hover: 0 16px 40px rgba(27, 91, 156, 0.14);
      --transition: 0.3s ease;
      --font-base: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-base);
      background: var(--bg);
      color: var(--text-body);
      line-height: 1.8;
      margin: 0;
      font-size: 15px;
      letter-spacing: 0.01em;
    }
    img { max-width: 100%; height: auto; object-fit: cover; }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-dark); }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; color: var(--text-heading); line-height: 1.4; margin: 0 0 16px; }
    p { margin: 0 0 16px; }
    button { font-family: var(--font-base); }
    a:focus-visible, button:focus-visible, .btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(43, 124, 211, 0.3);
    }

    .grid-container { max-width: 1200px; }

    /* ========== 按钮 ========== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 999px;
      font-size: 16px;
      font-weight: 600;
      line-height: 1;
      text-decoration: none;
      border: 2px solid transparent;
      cursor: pointer;
      transition: all var(--transition);
      white-space: nowrap;
    }
    .btn i { font-size: 16px; }
    .btn-primary {
      background: var(--teal);
      color: #fff;
      box-shadow: 0 8px 20px rgba(18, 165, 160, 0.25);
    }
    .btn-primary:hover {
      background: var(--teal-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(18, 165, 160, 0.3);
    }
    .btn-primary:active { transform: translateY(-1px); }
    .btn-secondary {
      background: #fff;
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-secondary:hover { background: #F0F6FC; color: var(--primary-dark); transform: translateY(-2px); }
    .btn-light-primary {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }
    .btn-light-primary:hover { background: #F0F6FC; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18); }
    .btn-light-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.65);
      color: #fff;
    }
    .btn-light-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; transform: translateY(-2px); }

    /* ========== 导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow var(--transition);
    }
    .site-header.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06); }
    .header-inner {
      display: flex;
      align-items: center;
      gap: 32px;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--teal));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 12px rgba(43, 124, 211, 0.3);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      letter-spacing: -0.02em;
    }
    .logo-sub {
      font-size: 12px;
      font-weight: 500;
      color: var(--text-muted);
      margin-left: 3px;
    }
    .main-nav {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .main-nav ul {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .main-nav ul li { margin: 0; }
    .main-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
      display: inline-block;
    }
    .main-nav a::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transform: scaleX(0);
      transform-origin: center;
      transition: transform var(--transition);
    }
    .main-nav li.active a,
    .main-nav a:hover { color: var(--primary); }
    .main-nav li.active a::after { transform: scaleX(1); }
    .btn-download-nav { margin-left: auto; flex-shrink: 0; }
    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 10px;
      flex-shrink: 0;
    }
    .nav-toggle span {
      width: 22px;
      height: 2px;
      background: var(--text-heading);
      border-radius: 2px;
      transition: all var(--transition);
    }
    .nav-overlay {
      position: fixed;
      inset: 0;
      background: rgba(17, 43, 71, 0.45);
      z-index: 999;
      opacity: 0;
      visibility: hidden;
      transition: all var(--transition);
    }
    .nav-overlay.show { opacity: 1; visibility: visible; }
    .nav-download-mobile { display: none; }

    @media (max-width: 900px) {
      .nav-toggle { display: flex; }
      .btn-download-nav { display: none; }
      .main-nav {
        position: fixed;
        top: 0;
        right: -300px;
        width: 280px;
        height: 100vh;
        background: #fff;
        z-index: 1001;
        padding: 84px 24px 32px;
        border-radius: 20px 0 0 20px;
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
        flex-direction: column;
        justify-content: flex-start;
        transition: right 0.35s ease;
        display: block;
      }
      .main-nav.open { right: 0; }
      .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
      }
      .main-nav a { font-size: 17px; }
      .nav-download-mobile {
        display: block;
        margin-top: 34px;
        padding-top: 24px;
        border-top: 1px solid var(--border);
      }
      body.nav-open { overflow: hidden; }
    }

    @media (max-width: 520px) {
      .header-inner { gap: 16px; }
      .logo-text { font-size: 19px; }
      .logo-sub { font-size: 11px; }
    }

    /* ========== 面包屑 ========== */
    .breadcrumb-section {
      padding: 18px 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
    }
    .breadcrumb {
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .breadcrumb a { color: var(--text-secondary); }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb span { color: var(--text-body); font-weight: 500; }

    /* ========== 页头 ========== */
    .page-hero {
      padding: 88px 0 76px;
      background: linear-gradient(135deg, #F0F6FC, #F7F9FC 50%, #E8F0F8);
      position: relative;
      overflow: hidden;
      text-align: center;
    }
    .page-hero::before {
      content: '';
      position: absolute;
      width: 360px;
      height: 360px;
      background: rgba(43, 124, 211, 0.06);
      border-radius: 50%;
      top: -90px;
      right: -80px;
    }
    .page-hero::after {
      content: '';
      position: absolute;
      width: 240px;
      height: 240px;
      background: rgba(18, 165, 160, 0.05);
      border-radius: 50%;
      bottom: -80px;
      left: -60px;
    }
    .page-hero h1 {
      font-size: 40px;
      font-weight: 700;
      color: var(--text-heading);
      line-height: 1.3;
      margin: 0 0 18px;
      position: relative;
      z-index: 1;
    }
    .page-hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.8;
      position: relative;
      z-index: 1;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    @media (max-width: 640px) {
      .page-hero { padding: 56px 0 48px; }
      .page-hero h1 { font-size: 30px; }
      .hero-actions { flex-direction: column; align-items: center; }
      .hero-actions .btn { width: 100%; max-width: 320px; }
    }

    /* ========== 通用板块 ========== */
    .section { padding: 96px 0; }
    .section-header { text-align: center; margin-bottom: 56px; }
    .section-header h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 14px;
      position: relative;
      display: inline-block;
    }
    .section-header h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: -8px;
      transform: translateX(-50%);
      width: 44px;
      height: 3px;
      border-radius: 3px;
      background: var(--teal);
    }
    .section-header p {
      font-size: 14px;
      color: var(--text-muted);
      margin: 20px 0 0;
    }

    @media (max-width: 1024px) { .section { padding: 72px 0; } }
    @media (max-width: 640px) { .section { padding: 56px 0; } }

    /* ========== 核心能力卡片 ========== */
    .feature-cards { background: #fff; }
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
      transition: all var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
      border: 1px solid transparent;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-light);
    }
    .card-image { position: relative; overflow: hidden; }
    .card-image img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }
    .feature-card:hover .card-image img { transform: scale(1.03); }
    .card-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(255, 255, 255, 0.94);
      color: var(--primary);
      padding: 5px 14px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
    .card-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .card-body h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-heading);
      margin: 0 0 12px;
    }
    .card-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 18px;
      flex: 1;
    }
    .card-tags { display: flex; gap: 8px; flex-wrap: wrap; }
    .tag {
      font-size: 12px;
      font-weight: 500;
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 4px 12px;
      border-radius: 6px;
    }

    /* ========== 适用赛事 ========== */
    .sports-types { background: var(--bg); }
    .type-list {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .badge-icon {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 16px 28px;
      background: #fff;
      border-radius: 999px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      transition: all var(--transition);
    }
    .badge-icon:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .badge-icon i { color: var(--primary); font-size: 20px; }

    @media (max-width: 640px) {
      .type-list { gap: 12px; }
      .badge-icon { padding: 12px 20px; font-size: 14px; }
    }

    /* ========== 工作流程 ========== */
    .workflow {
      background: linear-gradient(180deg, var(--bg) 0%, #fff 100%);
    }
    .step-item {
      text-align: center;
      padding: 36px 24px 32px;
      background: #fff;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      height: 100%;
      border: 1px solid transparent;
      transition: all var(--transition);
    }
    .step-item:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .step-num {
      font-size: 40px;
      font-weight: 800;
      color: var(--primary-light);
      display: block;
      margin-bottom: 16px;
      font-variant-numeric: tabular-nums;
      line-height: 1;
      letter-spacing: 0.02em;
      background: linear-gradient(135deg, var(--primary-light), #D6E7F8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .step-item h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 12px;
    }
    .step-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* ========== 统计 ========== */
    .stats-section {
      background: var(--dark);
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }
    .stats-section::before {
      content: '';
      position: absolute;
      width: 320px;
      height: 320px;
      background: rgba(43, 124, 211, 0.18);
      border-radius: 50%;
      top: -120px;
      right: -80px;
    }
    .stat-item { padding: 24px 16px; text-align: center; position: relative; z-index: 1; }
    .stat-num {
      font-size: 46px;
      font-weight: 800;
      color: #fff;
      display: block;
      font-variant-numeric: tabular-nums;
      line-height: 1.2;
      letter-spacing: -0.02em;
    }
    .stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.75);
      margin-top: 8px;
      display: block;
      font-weight: 400;
    }

    @media (max-width: 640px) {
      .stats-section { padding: 56px 0; }
      .stat-num { font-size: 36px; }
    }

    /* ========== FAQ ========== */
    .faq-section { background: #fff; }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
      transition: box-shadow var(--transition), border-color var(--transition);
    }
    .faq-item.open {
      border-color: var(--primary);
      box-shadow: 0 8px 24px rgba(43, 124, 211, 0.08);
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 14px;
      width: 100%;
      padding: 20px;
      background: none;
      border: none;
      cursor: pointer;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-heading);
      transition: color var(--transition);
    }
    .faq-question:hover { color: var(--primary); }
    .faq-icon {
      width: 30px;
      height: 30px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      flex-shrink: 0;
    }
    .faq-arrow {
      margin-left: auto;
      color: var(--text-muted);
      font-size: 15px;
      transition: transform var(--transition), color var(--transition);
      flex-shrink: 0;
    }
    .faq-item.open .faq-arrow { transform: rotate(45deg); color: var(--primary); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    .faq-item.open .faq-answer { max-height: 320px; }
    .faq-answer p {
      margin: 0;
      padding: 16px 20px 20px 64px;
      font-size: 14px;
      line-height: 1.8;
      color: var(--text-secondary);
      border-top: 1px dashed var(--border);
    }

    @media (max-width: 640px) {
      .faq-question { font-size: 15px; padding: 16px; }
      .faq-answer p { padding: 14px 16px 16px 56px; }
    }

    /* ========== CTA ========== */
    .cta-section { background: var(--bg); }
    .cta-box {
      background: linear-gradient(135deg, var(--primary) 0%, #1E6AB8 55%, var(--dark) 100%);
      border-radius: 24px;
      padding: 64px 40px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 48px rgba(17, 43, 71, 0.25);
    }
    .cta-box::before {
      content: '';
      position: absolute;
      width: 280px;
      height: 280px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
      top: -100px;
      right: -60px;
    }
    .cta-box::after {
      content: '';
      position: absolute;
      width: 160px;
      height: 160px;
      background: rgba(18, 165, 160, 0.25);
      border-radius: 50%;
      bottom: -60px;
      left: -40px;
    }
    .cta-box h2 {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
      margin: 0 0 14px;
      position: relative;
      z-index: 1;
    }
    .cta-box p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.88);
      margin-bottom: 36px;
      position: relative;
      z-index: 1;
    }
    .cta-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    @media (max-width: 640px) {
      .cta-box { padding: 44px 24px; }
      .cta-box h2 { font-size: 24px; }
      .cta-actions { flex-direction: column; align-items: center; }
      .cta-actions .btn { width: 100%; max-width: 280px; }
    }

    /* ========== 页脚 ========== */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.8);
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-brand .logo .logo-text { color: #fff; }
    .footer-brand .logo .logo-sub { color: rgba(255, 255, 255, 0.6); }
    .footer-brand-desc {
      font-size: 13px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.7);
      margin: 18px 0 24px;
      max-width: 300px;
    }
    .social-icons { display: flex; gap: 12px; }
    .social-icon {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(255, 255, 255, 0.8);
      font-size: 15px;
      transition: all var(--transition);
    }
    .social-icon:hover {
      background: var(--teal);
      color: #fff;
      transform: translateY(-2px);
    }
    .footer-title {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-col ul li { margin-bottom: 12px; }
    .footer-col ul a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.7);
      text-decoration: none;
      transition: color var(--transition);
    }
    .footer-col ul a:hover {
      color: #fff;
      text-decoration: underline;
    }
    .footer-contact p {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.7);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-contact p i { width: 16px; color: var(--teal); }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 24px 0;
      text-align: center;
    }
    .footer-bottom p {
      font-size: 12px;
      color: rgba(255, 255, 255, 0.5);
      margin: 0;
    }

    @media (max-width: 1024px) {
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
    }
    @media (max-width: 640px) {
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .site-footer { padding-top: 48px; }
    }

/* roulang page: category3 */
:root {
      --primary: #2B7CD3;
      --primary-dark: #1E6AB8;
      --primary-light: #E8F1FA;
      --accent: #12A5A0;
      --accent-hover: #21C7C0;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --dark: #112B47;
      --text: #3D5167;
      --heading: #16293D;
      --muted: #8494A7;
      --border: #E5EBF1;
      --radius: 16px;
      --radius-sm: 8px;
      --shadow: 0 8px 32px rgba(27, 91, 156, 0.08);
      --shadow-hover: 0 16px 40px rgba(27, 91, 156, 0.14);
      --transition: all .3s ease;
      --focus-ring: 0 0 0 3px rgba(43, 124, 211, 0.3);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

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

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      margin: 0;
      font-family: inherit;
      line-height: 1.4;
      color: var(--heading);
    }

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

    :focus-visible {
      outline: none;
      box-shadow: var(--focus-ring);
      border-radius: 4px;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      font-size: 16px;
      font-weight: 600;
      line-height: 1.2;
      border-radius: 999px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }

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

    .btn-primary:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(18, 165, 160, 0.25);
    }

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

    .btn-secondary {
      background: #fff;
      color: var(--primary);
      border: 2px solid var(--primary);
    }

    .btn-secondary:hover {
      background: #F0F6FC;
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    /* ===== 顶部导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      transition: box-shadow .3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    .logo-text {
      font-size: 22px;
      font-weight: 800;
      color: var(--heading);
      letter-spacing: -0.5px;
    }

    .logo-sub {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      margin-left: 2px;
    }

    .main-nav {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .main-nav ul {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .main-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      position: relative;
      padding: 6px 2px;
    }

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

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

    .main-nav li.active a::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -4px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-mobile-download {
      display: none;
    }

    .btn-download {
      flex-shrink: 0;
      padding: 10px 24px;
      font-size: 15px;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .hamburger span {
      width: 22px;
      height: 2px;
      background: var(--heading);
      border-radius: 2px;
      transition: var(--transition);
    }

    .hamburger.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
      opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== 页头 ===== */
    .page-hero {
      padding: 56px 0 48px;
      text-align: center;
      background: linear-gradient(180deg, #F0F6FC 0%, var(--bg) 100%);
    }

    .breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 20px;
    }

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

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

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

    .breadcrumb [aria-current="page"] {
      color: var(--heading);
      font-weight: 500;
    }

    .page-hero h1 {
      font-size: 38px;
      font-weight: 800;
      color: var(--heading);
      margin: 8px 0 12px;
      line-height: 1.3;
    }

    .hero-desc {
      font-size: 16px;
      color: #5A6B7F;
      max-width: 560px;
      margin: 0 auto 32px;
    }

    .anchor-nav {
      display: inline-flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      padding: 10px 14px;
      background: #fff;
      border-radius: 999px;
      box-shadow: var(--shadow);
    }

    .anchor-nav a {
      display: inline-flex;
      align-items: center;
      padding: 8px 22px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
      background: #F0F6FC;
      transition: var(--transition);
    }

    .anchor-nav a:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

    .anchor-nav a.active {
      background: var(--primary);
      color: #fff;
    }

    /* ===== 长文正文 ===== */
    .article-body {
      background: #fff;
      padding: 24px 0 72px;
    }

    .section-block {
      padding: 48px 0;
      scroll-margin-top: 88px;
    }

    .section-block + .section-block {
      border-top: 1px solid var(--border);
    }

    .section-content {
      padding: 16px 0;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 999px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .section-content h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--heading);
      margin: 0 0 16px;
      line-height: 1.4;
    }

    .section-content p {
      font-size: 15px;
      line-height: 1.9;
      color: var(--text);
      margin: 0 0 20px;
    }

    .section-image {
      text-align: center;
    }

    .section-image img {
      width: 100%;
      max-width: 520px;
      margin: 0 auto;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    /* 强度区间卡 */
    .info-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .info-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 24px 20px;
      transition: var(--transition);
    }

    .info-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--primary-light);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      margin-bottom: 14px;
    }

    .info-card h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--heading);
      margin: 0 0 8px;
    }

    .info-card p {
      font-size: 13px;
      color: var(--muted);
      margin: 0;
      line-height: 1.7;
    }

    /* 恢复清单 */
    .check-list {
      margin-top: 20px;
    }

    .check-list li {
      position: relative;
      padding-left: 34px;
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text);
      line-height: 1.7;
    }

    .check-list li::before {
      content: "\f00c";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      position: absolute;
      left: 0;
      top: 2px;
      width: 22px;
      height: 22px;
      background: var(--accent);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
    }

    /* 数据追踪指标卡 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .metric-card {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

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

    .metric-icon {
      font-size: 26px;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .metric-card h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--heading);
      margin: 0 0 6px;
    }

    .metric-card p {
      font-size: 13px;
      color: var(--muted);
      margin: 0;
      line-height: 1.6;
    }

    /* ===== 工具推荐 ===== */
    .tools-section {
      padding: 72px 0;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--heading);
      text-align: center;
      margin: 0 0 12px;
    }

    .section-subtitle {
      font-size: 14px;
      color: var(--muted);
      text-align: center;
      max-width: 480px;
      margin: 0 auto 40px;
    }

    .tool-card {
      background: #fff;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }

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

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

    .tool-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .tool-card-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--heading);
      margin: 0 0 10px;
    }

    .tool-card-body p {
      font-size: 14px;
      color: var(--text);
      line-height: 1.7;
      margin: 0 0 16px;
      flex: 1;
    }

    .tool-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }

    .tool-link:hover {
      color: var(--primary-dark);
      gap: 10px;
    }

    /* ===== 流程 ===== */
    .process-section {
      padding: 72px 0;
      background: #fff;
    }

    .process-card {
      text-align: center;
      padding: 32px 20px;
      border-radius: 16px;
      background: var(--bg);
      transition: var(--transition);
      height: 100%;
    }

    .process-card:hover {
      background: var(--primary-light);
      transform: translateY(-4px);
    }

    .process-step {
      display: inline-flex;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      font-size: 18px;
      font-weight: 700;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .process-card h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--heading);
      margin: 0 0 8px;
    }

    .process-card p {
      font-size: 13px;
      color: var(--muted);
      margin: 0;
      line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 72px 0;
    }

    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }

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

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

    .faq-question {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--heading);
      margin: 0;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      flex-shrink: 0;
      font-weight: 700;
    }

    .faq-toggle {
      margin-left: auto;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: #F0F6FC;
      color: var(--primary);
      font-size: 14px;
      flex-shrink: 0;
      transition: transform .3s ease;
    }

    .faq-item.open .faq-toggle {
      transform: rotate(45deg);
    }

    .faq-item.open .faq-question {
      color: var(--primary);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px 64px;
      font-size: 14px;
      color: var(--text);
      line-height: 1.8;
      border-top: 1px dashed var(--border);
      margin-top: 0;
    }

    .faq-item.open .faq-answer {
      display: block;
      padding-top: 16px;
      margin-top: 14px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 80px 0;
      background: linear-gradient(135deg, rgba(18, 165, 160, 0.92), rgba(30, 106, 184, 0.95)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      top: -120px;
      right: -80px;
    }

    .cta-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      color: #fff;
    }

    .cta-inner h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin: 0 0 12px;
    }

    .cta-inner p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.85);
      margin: 0 0 32px;
    }

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

    .cta-inner .btn-primary:hover {
      background: #F0F6FC;
      color: var(--primary-dark);
    }

    .cta-inner .btn-secondary {
      background: transparent;
      color: #fff;
      border-color: rgba(255, 255, 255, 0.7);
    }

    .cta-inner .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.7);
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand .logo {
      margin-bottom: 16px;
    }

    .footer-brand .logo-text {
      color: #fff;
    }

    .footer-brand .logo-sub {
      color: #7FB8E8;
    }

    .footer-brand-desc {
      font-size: 13px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.65);
      margin: 0 0 20px;
      max-width: 280px;
    }

    .social-icons {
      display: flex;
      gap: 10px;
    }

    .social-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      color: rgba(255, 255, 255, 0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      transition: var(--transition);
    }

    .social-icon:hover {
      background: var(--accent);
      color: #fff;
      transform: translateY(-2px);
    }

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

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

    .footer-col a {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
    }

    .footer-col a:hover {
      color: #fff;
      text-decoration: underline;
    }

    .footer-contact p {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.65);
      margin-bottom: 12px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px 0;
      text-align: center;
      font-size: 12px;
      color: rgba(255, 255, 255, 0.5);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .header-inner {
        height: 64px;
      }

      .main-nav ul {
        gap: 20px;
      }

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

      .info-card-grid,
      .metric-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }

      .hamburger {
        display: flex;
      }

      .main-nav {
        position: fixed;
        top: 64px;
        left: 16px;
        right: 16px;
        background: #fff;
        border-radius: 16px;
        box-shadow: var(--shadow-hover);
        padding: 24px;
        display: none;
        z-index: 100;
      }

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

      .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
      }

      .main-nav a {
        display: block;
        padding: 12px 16px;
        border-radius: 10px;
      }

      .main-nav li.active a {
        background: var(--primary-light);
      }

      .main-nav li.active a::after {
        display: none;
      }

      .nav-mobile-download {
        display: block;
        margin-top: 16px;
        text-align: center;
      }

      .nav-mobile-download .btn {
        width: 100%;
      }

      .btn-download {
        display: none;
      }

      .page-hero {
        padding: 40px 0 32px;
      }

      .page-hero h1 {
        font-size: 28px;
      }

      .anchor-nav {
        border-radius: 16px;
        width: 100%;
      }

      .category-section {
        padding: 56px 0;
      }

      .section-block {
        scroll-margin-top: 76px;
      }

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

      .faq-answer {
        padding: 0 20px 20px 56px;
      }

      .cta-section {
        padding: 56px 0;
      }

      .cta-inner h2 {
        font-size: 26px;
      }
    }

    @media (max-width: 640px) {
      .page-hero h1 {
        font-size: 24px;
      }

      .anchor-nav a {
        flex: 1;
        justify-content: center;
        padding: 8px 14px;
      }

      .info-card-grid,
      .metric-grid {
        grid-template-columns: 1fr;
      }

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

      .section-content h2 {
        font-size: 22px;
      }

      .tool-card img {
        height: 160px;
      }

      .process-card {
        padding: 24px 16px;
      }

      .cta-inner h2 {
        font-size: 22px;
      }

      .cta-inner .btn-group .btn {
        width: 100%;
        margin-bottom: 12px;
      }
    }