/* roulang page: index */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1A4A73;
  --primary-tint: #EAF1F8;
  --gold: #C59B45;
  --green: #2F855A;
  --red: #C53030;
  --bg-page: #F5F7FA;
  --bg-card: #FFFFFF;
  --text-main: #1A202C;
  --text-sub: #4A5568;
  --text-weak: #A0AEC0;
  --border-line: #E2E8F0;
  --heading-blue: #1A365D;
  --text-body: #333333;
  --font-body: 16px;
  --font-sm: 14px;
  --font-xs: 12px;
  --font-h1: 40px;
  --font-h2: 30px;
  --font-h3: 20px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 12px rgba(26, 54, 93, 0.06), 0 1px 3px rgba(26, 54, 93, 0.04);
  --shadow-hover: 0 8px 24px rgba(26, 54, 93, 0.12), 0 2px 6px rgba(26, 54, 93, 0.06);
  --container-w: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-size: var(--font-body);
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

input {
  font-family: inherit;
}

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

.section-head {
  margin-bottom: 40px;
  text-align: center;
}

.section-head .section-tag {
  display: inline-block;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: var(--font-xs);
  font-weight: 600;
  letter-spacing: 1px;
  padding: 4px 16px;
  border-radius: 999px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-head h2 {
  font-size: var(--font-h2);
  font-weight: 700;
  color: var(--heading-blue);
  line-height: 1.35;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-line);
  box-shadow: 0 2px 8px rgba(26, 54, 93, 0.04);
}

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

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

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 2px 8px rgba(43, 108, 176, 0.3);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

.logo-text span {
  color: var(--primary);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, color 0.2s ease;
  position: relative;
}

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

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

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

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

.search-box {
  position: relative;
}

.search-box input {
  width: 180px;
  height: 38px;
  border: 1px solid var(--border-line);
  border-radius: 999px;
  padding: 0 38px 0 16px;
  font-size: 14px;
  background: #F7FAFC;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, width 0.3s ease;
}

.search-box input::placeholder {
  color: var(--text-weak);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.2);
  width: 220px;
  background: #fff;
}

.search-box .search-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: background 0.2s ease, color 0.2s ease;
}

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

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 22px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.header-cta:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3);
}

.header-cta:active {
  transform: translateY(1px);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 20px;
  transition: background 0.2s ease;
}

.menu-toggle:hover {
  background: var(--primary-tint);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 90px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.92) 0%, rgba(234,241,248,0.78) 50%, rgba(234,241,248,0.35) 100%);
}

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

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border-line);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 13px;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(26, 54, 93, 0.06);
  backdrop-filter: blur(4px);
}

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

.hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--heading-blue);
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

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

.hero-sub {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 30px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(43, 108, 176, 0.3);
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(43, 108, 176, 0.35);
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 30px;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-sm);
  transition: background 0.25s ease, color 0.2s ease, border-color 0.2s ease;
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background: var(--primary-tint);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.hero-trust {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  font-weight: 500;
}

.trust-item i {
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  box-shadow: 0 2px 6px rgba(26, 54, 93, 0.06);
}

/* ===== Collection Section ===== */
.collection-section {
  padding: 80px 0;
}

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

.collection-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.collection-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.collection-card .card-cover {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.collection-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.collection-card .card-cover img:hover {
  transform: scale(1.03);
}

.collection-card .card-body {
  padding: 24px;
}

.card-badge {
  display: inline-block;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  padding: 3px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 0.3px;
}

.collection-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}

.collection-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s ease;
}

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

/* ===== Featured Section ===== */
.featured-section {
  padding: 80px 0;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
}

.featured-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.featured-main-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(226, 232, 240, 0.6);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

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

.featured-main-card .featured-label {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 5;
  background: var(--gold);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(197, 155, 69, 0.3);
}

.featured-main-card .cover-wrap {
  height: 240px;
  overflow: hidden;
}

.featured-main-card .cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.featured-main-card .cover-wrap img:hover {
  transform: scale(1.03);
}

.featured-main-card .card-body {
  padding: 24px;
}

.featured-main-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.featured-main-card .card-desc {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 16px;
}

.card-meta .chip {
  display: inline-block;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 12px;
  padding: 2px 12px;
  border-radius: 999px;
  font-weight: 500;
}

.featured-cards-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.featured-side-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  gap: 16px;
  padding: 16px;
  border: 1px solid rgba(226, 232, 240, 0.6);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  flex: 1;
}

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

.featured-side-card .side-cover {
  width: 120px;
  min-width: 120px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.featured-side-card .side-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-side-card .side-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-side-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-side-card .meta-line {
  font-size: 12px;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== News / CMS Section ===== */
.news-section {
  padding: 80px 0;
}

.news-list {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(226, 232, 240, 0.6);
  overflow: hidden;
}

.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-line);
  transition: background 0.2s ease;
}

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

.news-item:hover {
  background: var(--primary-tint);
}

.news-item .news-content {
  flex: 1;
  min-width: 0;
}

.news-item .news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s ease;
}

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

.news-item .news-summary {
  font-size: 14px;
  color: var(--text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0;
}

.news-item .news-tag {
  flex-shrink: 0;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 999px;
  font-weight: 500;
}

.news-item .news-date {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-item .news-link {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  padding: 6px 14px;
  border: 1px solid var(--border-line);
  border-radius: 999px;
  transition: all 0.2s ease;
}

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

.news-empty {
  text-align: center;
  padding: 60px 20px;
}

.news-empty i {
  font-size: 40px;
  color: var(--text-weak);
  margin-bottom: 16px;
  display: block;
}

.news-empty p {
  font-size: 15px;
  color: var(--text-sub);
}

/* ===== Grid Nav ===== */
.gridnav-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
}

.gridnav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gridnav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-page);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-line);
  transition: all 0.25s ease;
}

.gridnav-item:hover {
  background: var(--primary-tint);
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.gridnav-item .icon-wrap {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(43, 108, 176, 0.25);
}

.gridnav-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.gridnav-item p {
  font-size: 13px;
  color: var(--text-sub);
}

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

.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(226, 232, 240, 0.6);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}

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

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

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  background: none;
  width: 100%;
  text-align: left;
  transition: color 0.2s ease;
}

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

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-sub);
  border-top: 1px solid #EDF2F7;
}

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 64px 0;
  background: linear-gradient(135deg, var(--primary-tint) 0%, #dbe7f3 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.6);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.cta-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--heading-blue);
  margin-bottom: 14px;
  line-height: 1.35;
}

.cta-inner p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 28px;
  line-height: 1.6;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .logo-text {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}

.footer-brand .logo-text span {
  color: #90cdf4;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-col p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
}

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

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

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

  .main-nav a {
    padding: 8px 12px;
    font-size: 14px;
  }

  .search-box input {
    width: 140px;
  }

  .search-box input:focus {
    width: 160px;
  }

  .hero h1 {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-line);
    box-shadow: 0 8px 16px rgba(26, 54, 93, 0.08);
    padding: 12px 16px;
  }

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

  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .main-nav a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

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

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

  .search-box {
    display: none;
  }

  .header-cta {
    padding: 8px 16px;
    font-size: 13px;
  }

  .hero {
    padding: 60px 0 50px;
    background-position: 70% center;
  }

  .hero::before {
    background: linear-gradient(0deg, rgba(255,255,255,0.94) 0%, rgba(234,241,248,0.85) 100%);
  }

  .hero-content {
    text-align: center;
    margin: 0 auto;
  }

  .hero h1 {
    font-size: 30px;
  }

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

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

  .hero-trust {
    justify-content: center;
    gap: 20px;
  }

  .collection-section,
  .featured-section,
  .news-section,
  .gridnav-section,
  .faq-section {
    padding: 56px 0;
  }

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

  .news-item {
    flex-wrap: wrap;
    padding: 16px 20px;
    gap: 10px;
  }

  .news-item .news-content {
    flex: 1 1 calc(100% - 70px);
  }

  .news-item .news-tag {
    display: none;
  }

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

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

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

  .gridnav-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .gridnav-item {
    padding: 20px 12px;
  }

  .gridnav-item .icon-wrap {
    width: 44px;
    height: 44px;
    font-size: 18px;
    border-radius: 12px;
  }

  .featured-side-card {
    flex-direction: column;
  }

  .featured-side-card .side-cover {
    width: 100%;
    min-width: 100%;
    height: 140px;
  }

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

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

  .hero-trust {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

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

  .news-item .news-link {
    display: none;
  }

  .news-item .news-content {
    flex: 1;
  }
}

/* roulang page: category1 */
/* ===== Design Tokens ===== */
    :root {
      --primary: #2B6CB0;
      --primary-dark: #1A4A73;
      --primary-light: #EAF1F8;
      --accent: #C59B45;
      --green: #2F855A;
      --red: #C53030;
      --bg-page: #F5F7FA;
      --bg-card: #FFFFFF;
      --text-strong: #1A202C;
      --text-body: #333333;
      --text-secondary: #4A5568;
      --text-muted: #A0AEC0;
      --border-light: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-card: 0 2px 12px rgba(26, 54, 93, 0.06), 0 1px 3px rgba(26, 54, 93, 0.04);
      --shadow-hover: 0 8px 24px rgba(26, 54, 93, 0.12), 0 2px 6px rgba(26, 54, 93, 0.06);
      --container-width: 1200px;
      --space-section: 80px;
      --space-section-mobile: 48px;
      --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Inter, "Helvetica Neue", Arial, sans-serif;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-family);
      font-size: 16px;
      line-height: 1.6;
      background-color: var(--bg-page);
      color: var(--text-body);
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    ul, ol {
      list-style: none;
    }
    button, input {
      font-family: inherit;
      font-size: inherit;
      border: none;
      background: none;
      outline: none;
    }
    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: var(--space-section) 0;
    }
    .section-inner {
      padding: 0;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-strong);
      text-align: center;
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-secondary);
      text-align: center;
      max-width: 560px;
      margin: 0 auto 48px;
      line-height: 1.65;
    }
    .text-center {
      text-align: center;
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1.5px solid transparent;
      line-height: 1.4;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(43, 108, 176, 0.3);
    }
    .btn-primary:active {
      transform: translateY(0);
    }
    .btn-primary:focus-visible {
      outline: 3px solid rgba(43, 108, 176, 0.4);
      outline-offset: 2px;
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(43, 108, 176, 0.06);
      border-color: var(--primary-dark);
      transform: translateY(-2px);
    }
    .btn-outline:active {
      transform: translateY(0);
    }
    .btn-large {
      padding: 16px 36px;
      font-size: 16px;
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
      box-shadow: 0 2px 8px rgba(197, 155, 69, 0.25);
    }
    .btn-accent:hover {
      background: #b3892e;
      border-color: #b3892e;
      transform: translateY(-2px);
    }

    /* ===== Badge / Chip ===== */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 12px;
      font-weight: 500;
      background: var(--primary-light);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 999px;
      line-height: 1.4;
    }
    .badge-accent {
      background: rgba(197, 155, 69, 0.12);
      color: #8a6a1c;
    }
    .badge-green {
      background: rgba(47, 133, 90, 0.1);
      color: var(--green);
    }

    /* ===== Header & Nav ===== */
    .site-header {
      background: #fff;
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 1px 6px rgba(26, 54, 93, 0.04);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }
    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 12px rgba(43, 108, 176, 0.28);
    }
    .logo-text {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-strong);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .logo-text span {
      color: var(--primary);
    }
    .main-nav ul {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .main-nav a {
      display: block;
      padding: 10px 16px;
      font-size: 15px;
      color: var(--text-secondary);
      border-radius: var(--radius-sm);
      font-weight: 500;
      position: relative;
      transition: background 0.2s, color 0.2s;
    }
    .main-nav a:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    .main-nav a.active {
      color: var(--primary);
      font-weight: 600;
    }
    .main-nav a.active::after {
      content: "";
      position: absolute;
      left: 14px;
      right: 14px;
      bottom: 2px;
      height: 3px;
      border-radius: 2px;
      background: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: var(--bg-page);
      border-radius: 999px;
      padding: 0 14px;
      height: 38px;
      border: 1.5px solid transparent;
      transition: border-color 0.25s, box-shadow 0.25s;
    }
    .search-box i {
      font-size: 13px;
      color: var(--text-muted);
      margin-right: 8px;
    }
    .search-box input {
      border: none;
      background: transparent;
      font-size: 14px;
      width: 140px;
      color: var(--text-strong);
    }
    .search-box input::placeholder {
      color: var(--text-muted);
    }
    .search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15);
      background: #fff;
    }
    .header-cta {
      padding: 10px 20px;
      font-size: 14px;
    }
    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--text-strong);
      cursor: pointer;
      border: 1px solid var(--border-light);
      background: #fff;
    }
    .nav-toggle:hover {
      background: var(--primary-light);
    }

    /* ===== Mobile Nav Panel ===== */
    .mobile-nav {
      display: none;
      background: #fff;
      border-top: 1px solid var(--border-light);
      padding: 16px 24px 20px;
    }
    .mobile-nav ul {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .mobile-nav a {
      display: block;
      padding: 12px 16px;
      font-size: 15px;
      color: var(--text-secondary);
      border-radius: var(--radius-sm);
      font-weight: 500;
    }
    .mobile-nav a:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    .mobile-nav a.active {
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 600;
    }
    .mobile-nav.open {
      display: block;
    }

    /* ===== Hero Banner ===== */
    .category-hero {
      background: linear-gradient(135deg, rgba(234, 241, 248, 0.94), rgba(255, 255, 255, 0.9)),
        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      padding: 76px 0;
      position: relative;
      border-bottom: 1px solid var(--border-light);
    }
    .category-hero .breadcrumb {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 18px;
    }
    .category-hero .breadcrumb a {
      color: var(--primary);
    }
    .category-hero .breadcrumb a:hover {
      color: var(--primary-dark);
    }
    .category-hero .breadcrumb i {
      font-size: 11px;
      color: var(--text-muted);
    }
    .category-hero h1 {
      font-size: 38px;
      font-weight: 700;
      color: #1A365D;
      line-height: 1.25;
      margin-bottom: 14px;
      max-width: 640px;
    }
    .category-hero .hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 580px;
      line-height: 1.7;
      margin-bottom: 30px;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }
    .hero-trust {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }
    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-secondary);
    }
    .trust-item i {
      color: var(--green);
      font-size: 15px;
    }

    /* ===== Download Channels ===== */
    .channels-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .channel-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.25s;
      border: 1px solid rgba(226, 232, 240, 0.6);
      position: relative;
    }
    .channel-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .channel-card .icon-circle {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 18px;
    }
    .channel-card h3 {
      font-size: 19px;
      font-weight: 600;
      color: var(--text-strong);
      margin-bottom: 10px;
    }
    .channel-card p {
      font-size: 14px;
      line-height: 1.65;
      color: var(--text-secondary);
      margin-bottom: 14px;
    }
    .channel-card .card-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .channel-card .card-link:hover {
      color: var(--primary-dark);
      gap: 8px;
    }

    /* ===== Download Steps ===== */
    .steps-section {
      background: #fff;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step-counter;
    }
    .step-item {
      text-align: center;
      padding: 24px 16px;
      position: relative;
    }
    .step-number {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 16px;
      font-weight: 700;
      margin: 0 auto 14px;
      counter-increment: step-counter;
    }
    .step-item h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-strong);
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .step-arrow {
      position: absolute;
      top: 50%;
      right: -20px;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 14px;
    }
    .step-item:last-child .step-arrow {
      display: none;
    }

    /* ===== Scenarios ===== */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .scenario-card {
      display: flex;
      gap: 20px;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(226, 232, 240, 0.5);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .scenario-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .scenario-card img {
      width: 140px;
      height: 105px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      flex-shrink: 0;
    }
    .scenario-card .scenario-content {
      flex: 1;
    }
    .scenario-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-strong);
      margin-bottom: 8px;
    }
    .scenario-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
    }
    .scenario-card .badge-group {
      margin-top: 10px;
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    /* ===== Security Tips ===== */
    .security-section {
      background: linear-gradient(135deg, #1A4A73, #1e3a5f);
      color: #fff;
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .security-item {
      background: rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: background 0.25s, transform 0.25s;
    }
    .security-item:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-3px);
    }
    .security-item .icon-circle {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: #fff;
      margin: 0 auto 14px;
    }
    .security-item h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .security-item p {
      font-size: 14px;
      line-height: 1.6;
      color: rgba(255, 255, 255, 0.75);
    }
    .security-note {
      text-align: center;
      margin-top: 36px;
      font-size: 15px;
      color: rgba(255, 255, 255, 0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .security-note i {
      color: #f0c04a;
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      margin-bottom: 12px;
      border: 1px solid rgba(226, 232, 240, 0.6);
      overflow: hidden;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-strong);
      cursor: pointer;
      background: transparent;
      text-align: left;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(234, 241, 248, 0.4);
    }
    .faq-question .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      border-top: 0 solid var(--border-light);
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      border-top-width: 1px;
    }
    .faq-answer p {
      padding: 16px 24px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-secondary);
    }

    /* ===== CTA Banner ===== */
    .cta-banner {
      background: linear-gradient(135deg, var(--primary-light), #e0edf7);
      border-radius: var(--radius-lg);
      padding: 48px 36px;
      text-align: center;
      border: 1px solid rgba(43, 108, 176, 0.08);
    }
    .cta-banner h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-strong);
      margin-bottom: 12px;
    }
    .cta-banner p {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 520px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    /* ===== Other Categories ===== */
    .other-cats {
      background: #fff;
      border-top: 1px solid var(--border-light);
    }
    .other-cats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .other-cat-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(226, 232, 240, 0.5);
      transition: transform 0.25s, box-shadow 0.25s;
      text-align: left;
      display: block;
    }
    .other-cat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .other-cat-card .cat-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: 16px;
    }
    .other-cat-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-strong);
      margin-bottom: 8px;
    }
    .other-cat-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 12px;
    }
    .other-cat-card .card-link {
      font-size: 14px;
      color: var(--primary);
      font-weight: 500;
    }
    .other-cat-card .card-link:hover {
      color: var(--primary-dark);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--primary-dark);
      color: rgba(255, 255, 255, 0.85);
      padding: 56px 0 24px;
    }
    .site-footer .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand .logo-text {
      color: #fff;
      font-size: 20px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .footer-brand .logo-text span {
      color: #7cb3e0;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.65);
      margin-top: 12px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-col h4::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 28px;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.65);
      transition: color 0.2s, padding-left 0.2s;
    }
    .footer-col ul a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-col p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.65);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.5);
    }
    .footer-bottom a {
      color: rgba(255, 255, 255, 0.7);
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1023px) {
      .main-nav {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .search-box {
        display: none;
      }
      .header-cta {
        display: none;
      }
      .channels-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-arrow {
        display: none;
      }
      .scenarios-grid {
        grid-template-columns: 1fr;
      }
      .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .other-cats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .site-footer .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (min-width: 768px) and (max-width: 1023px) {
      .category-hero h1 {
        font-size: 34px;
      }
    }
    @media (max-width: 767px) {
      :root {
        --space-section: 48px;
      }
      .container {
        padding: 0 16px;
      }
      .header-inner {
        height: 64px;
      }
      .logo-text {
        font-size: 16px;
      }
      .category-hero {
        padding: 48px 0;
      }
      .category-hero h1 {
        font-size: 28px;
      }
      .category-hero .hero-desc {
        font-size: 15px;
      }
      .hero-btns .btn {
        width: 100%;
        justify-content: center;
      }
      .hero-trust {
        gap: 18px;
        flex-direction: column;
      }
      .channels-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .scenario-card {
        flex-direction: column;
        padding: 20px;
      }
      .scenario-card img {
        width: 100%;
        height: 160px;
      }
      .security-grid {
        grid-template-columns: 1fr;
      }
      .other-cats-grid {
        grid-template-columns: 1fr;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .cta-banner {
        padding: 32px 20px;
      }
      .cta-banner h2 {
        font-size: 24px;
      }
      .cta-banner .btn {
        width: 100%;
      }
      .section-subtitle {
        font-size: 14px;
        margin-bottom: 32px;
      }
    }

    /* ===== Utility ===== */
    .text-small {
      font-size: 14px;
    }
    .text-muted {
      color: var(--text-muted);
    }
    .mt-2 { margin-top: 20px; }
    .mb-2 { margin-bottom: 20px; }

/* roulang page: article */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1A4A73;
  --primary-light: #EAF1F8;
  --accent: #C59B45;
  --green: #2F855A;
  --red: #C53030;
  --bg: #F5F7FA;
  --card-bg: #FFFFFF;
  --text: #1A202C;
  --text-secondary: #4A5568;
  --text-muted: #A0AEC0;
  --border: #E2E8F0;
  --title-color: #1A365D;
  --body-text: #333333;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(26, 54, 93, 0.06), 0 1px 3px rgba(26, 54, 93, 0.04);
  --shadow-hover: 0 8px 24px rgba(26, 54, 93, 0.12), 0 2px 6px rgba(26, 54, 93, 0.06);
  --transition: 0.25s ease;
  --font-body: 16px;
  --font-sm: 14px;
  --font-xs: 12px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-size: var(--font-body);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
ul, ol {
  list-style: none;
  padding: 0;
}
button, input {
  font-family: inherit;
  border: none;
  outline: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(26, 54, 93, 0.04);
}
.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 i {
  font-size: 26px;
  color: var(--primary);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: 0.3px;
}
.logo-text span {
  color: var(--primary);
}
.main-nav ul {
  display: flex;
  gap: 6px;
}
.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: 8px;
  font-weight: 500;
  transition: all var(--transition);
}
.main-nav a:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.main-nav a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
}
.search-box input {
  width: 180px;
  height: 38px;
  padding: 0 12px 0 36px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid transparent;
  font-size: 14px;
  transition: all var(--transition);
}
.search-box input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.12);
}
.search-box i {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid transparent;
  background: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(43, 108, 176, 0.2);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.25);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-primary:focus {
  outline: 3px solid rgba(43, 108, 176, 0.4);
  outline-offset: 2px;
}
.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
}
.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
  border-radius: 10px;
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}
.breadcrumb-wrap {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  padding: 14px 0;
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: #cbd5e0;
  font-size: 12px;
}
.breadcrumb .current {
  color: var(--text-secondary);
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-wrap {
  padding: 36px 0 72px;
}
.article-main {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 48px 56px;
}
.article-main .article-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--title-color);
  line-height: 1.3;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  font-size: 14px;
  color: var(--text-muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.article-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-item i {
  font-size: 14px;
  color: var(--text-muted);
}
.article-meta .badge {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.article-cover {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
}
.article-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-text);
}
.article-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--title-color);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.article-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--title-color);
  margin: 24px 0 12px;
}
.article-content p {
  margin-bottom: 16px;
}
.article-content ul,
.article-content ol {
  margin-bottom: 16px;
  padding-left: 20px;
}
.article-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 20px 0;
  color: var(--text-secondary);
}
.article-content img {
  border-radius: var(--radius);
  margin: 20px 0;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--primary-dark);
}
.article-content code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
}
.article-content th {
  background: var(--primary-light);
  color: var(--title-color);
  font-weight: 600;
}
.not-found {
  max-width: 720px;
  margin: 48px auto;
  text-align: center;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 64px 48px;
}
.not-found i {
  font-size: 52px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.not-found h1 {
  font-size: 28px;
  color: var(--title-color);
  margin-bottom: 12px;
}
.not-found p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 15px;
}
.related-wrap {
  padding: 72px 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--title-color);
  display: inline-block;
  position: relative;
  padding-bottom: 10px;
}
.section-header h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all var(--transition);
  display: block;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card-cover {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.related-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.related-card:hover .related-card-cover img {
  transform: scale(1.02);
}
.related-card-body {
  padding: 20px 24px 24px;
}
.related-card-body .badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.related-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
  transition: color var(--transition);
}
.related-card:hover .related-card-body h3 {
  color: var(--primary);
}
.related-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-date {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.related-date i {
  font-size: 12px;
}
.cta-wrap {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--primary-light) 0%, #f7fafc 100%);
  border-top: 1px solid var(--border);
}
.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--title-color);
  margin-bottom: 14px;
  line-height: 1.4;
}
.cta-inner p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 16px;
}
.cta-inner .btn {
  margin: 0 6px;
}
.site-footer {
  background: var(--primary-dark);
  color: #cbd5e0;
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
}
.footer-brand .logo-text span {
  color: #90cdf4;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: #a0aec0;
  margin-top: 14px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col a {
  color: #a0aec0;
  font-size: 14px;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: #fff;
}
.footer-col p {
  font-size: 13px;
  line-height: 1.7;
  color: #a0aec0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #a0aec0;
}
.footer-bottom a {
  color: #a0aec0;
}
.footer-bottom a:hover {
  color: #fff;
}
@media (max-width: 1024px) {
  .header-actions .search-box input {
    width: 140px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    height: 64px;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 16px 24px;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 4px;
  }
  .main-nav a {
    padding: 12px 16px;
    font-size: 16px;
  }
  .header-actions .search-box {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .btn-sm {
    padding: 8px 16px;
    font-size: 13px;
  }
  .article-main {
    padding: 24px 20px;
    border-radius: var(--radius);
  }
  .article-main .article-title {
    font-size: 24px;
  }
  .article-meta {
    gap: 12px;
    font-size: 13px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .article-wrap {
    padding: 24px 0 48px;
  }
  .related-wrap,
  .cta-wrap {
    padding: 48px 0;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .cta-inner h2 {
    font-size: 22px;
  }
  .not-found {
    padding: 48px 24px;
  }
  .not-found h1 {
    font-size: 24px;
  }
}
@media (max-width: 520px) {
  .header-actions .btn-sm {
    display: none;
  }
  .logo-text {
    font-size: 16px;
  }
  .logo i {
    font-size: 22px;
  }
  .footer-brand .logo-text {
    font-size: 18px;
  }
  .article-content {
    font-size: 15px;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1A4A73;
  --primary-tint: #EAF1F8;
  --gold: #C59B45;
  --green: #2F855A;
  --red: #C53030;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --text: #1A202C;
  --text2: #4A5568;
  --muted: #A0AEC0;
  --border: #E2E8F0;
  --title-dark: #1A365D;
  --body-text: #333333;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 12px rgba(26,54,93,0.06), 0 1px 3px rgba(26,54,93,0.04);
  --shadow-lg: 0 8px 24px rgba(26,54,93,0.12), 0 2px 6px rgba(26,54,93,0.06);
  --transition: .3s ease;
  --font-stack: "PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --container-w: 1200px;
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: var(--primary); transition: color .3s ease; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}
section { position: relative; }

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  padding: 13px 30px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(43,108,176,0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(26,74,115,0.3);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(26,74,115,0.2); }
.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline: 3px solid rgba(43,108,176,0.4);
  outline-offset: 2px;
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: rgba(43,108,176,0.06);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}
.btn-outline:active { transform: scale(0.98); }
.btn-lg { padding: 16px 38px; font-size: 16px; border-radius: 10px; }
.btn-sm { padding: 10px 20px; font-size: 14px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(26,54,93,0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-tint);
  color: var(--primary);
  border-radius: 10px;
  font-size: 18px;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text span { color: var(--primary); }
.main-nav ul { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text2);
  border-radius: var(--radius-sm);
  transition: all .3s ease;
  position: relative;
}
.main-nav a:hover {
  background: var(--primary-tint);
  color: var(--primary);
}
.main-nav a.active {
  color: var(--primary);
  font-weight: 600;
  background: transparent;
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -4px;
  height: 3px;
  background: var(--primary);
  border-radius: 99px;
}
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box input {
  width: 180px;
  height: 38px;
  padding: 0 38px 0 16px;
  border: 1.5px solid var(--border);
  border-radius: 99px;
  background: var(--bg);
  font-size: 14px;
  color: var(--text);
  transition: all .3s ease;
}
.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43,108,176,0.15);
  width: 220px;
}
.search-box i {
  position: absolute;
  right: 13px;
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Page Hero ===== */
.page-hero {
  padding: 96px 0 88px;
  background: linear-gradient(135deg, rgba(234,241,248,0.92), rgba(255,255,255,0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  text-align: center;
  overflow: hidden;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--white);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 99px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.hero-badge i { font-size: 14px; }
.page-hero h1 {
  font-size: 42px;
  font-weight: 700;
  color: var(--title-dark);
  line-height: 1.3;
  margin-bottom: 20px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}
.hero-subtitle {
  font-size: 16px;
  color: var(--text2);
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-trust {
  display: flex;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}
.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
}
.hero-trust i { color: var(--primary); font-size: 16px; }

/* ===== 数据徽章条 ===== */
.stats-bar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
  box-shadow: var(--shadow-sm);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item { padding: 10px; }
.stat-num {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.stat-num small { font-size: 18px; font-weight: 600; }
.stat-label {
  font-size: 14px;
  color: var(--text2);
  margin-top: 6px;
}

/* ===== 通用 Section 头部 ===== */
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head .section-tag {
  display: inline-block;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 99px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--title-dark);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-head p {
  font-size: 15px;
  color: var(--text2);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 卖点卡片 ===== */
.features {
  padding: 88px 0 80px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226,232,240,0.6);
  transition: all var(--transition);
  text-align: left;
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(43,108,176,0.2);
}
.feature-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-tint);
  color: var(--primary);
  border-radius: var(--radius-md);
  font-size: 22px;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--title-dark);
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text2);
}

/* ===== 上手流程 ===== */
.process {
  padding: 88px 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  counter-reset: process;
}
.process-step {
  text-align: center;
  position: relative;
  padding: 20px 12px 0;
}
.process-step::before {
  counter-increment: process;
  content: counter(process, decimal-leading-zero);
  display: block;
  width: 42px;
  height: 42px;
  margin: 0 auto 18px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(43,108,176,0.25);
  position: relative;
  z-index: 2;
}
.process-step::after {
  content: "";
  position: absolute;
  top: 42px;
  left: calc(50% + 28px);
  width: calc(100% - 56px);
  height: 2px;
  background: var(--border);
  z-index: 1;
}
.process-step:last-child::after { display: none; }
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--title-dark);
  margin-bottom: 10px;
}
.process-step p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.7;
}
.process-step .step-icon {
  display: block;
  font-size: 26px;
  color: var(--primary);
  margin: 0 auto 12px;
}

/* ===== 适用场景 ===== */
.scenarios {
  padding: 88px 0;
}
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid rgba(226,232,240,0.5);
  display: flex;
  flex-direction: column;
}
.scenario-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.scenario-card .scenario-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.scenario-card .scenario-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.scenario-card:hover .scenario-img img { transform: scale(1.04); }
.scenario-body {
  padding: 22px 22px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.scenario-body .scenario-tag {
  display: inline-block;
  align-self: flex-start;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 99px;
  margin-bottom: 12px;
}
.scenario-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--title-dark);
  margin-bottom: 10px;
  line-height: 1.4;
}
.scenario-body p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.7;
  flex: 1;
}

/* ===== 指南要点 ===== */
.guide-tips {
  padding: 88px 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.tips-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.tip-card {
  display: flex;
  gap: 20px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid rgba(226,232,240,0.5);
  transition: all var(--transition);
}
.tip-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  background: var(--white);
}
.tip-icon {
  width: 46px;
  height: 46px;
  background: var(--white);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}
.tip-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--title-dark);
  margin-bottom: 8px;
}
.tip-body p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.7;
}
.tip-body .tip-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-top: 10px;
}
.tip-body .tip-link:hover { color: var(--primary-dark); }
.tip-body .tip-link i { font-size: 12px; }

/* ===== FAQ ===== */
.faq {
  padding: 88px 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226,232,240,0.6);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.open { box-shadow: var(--shadow-lg); border-color: rgba(43,108,176,0.2); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color .3s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-q .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-tint);
  color: var(--primary);
  border-radius: 50%;
  font-size: 14px;
  transition: all .3s ease;
}
.faq-item.open .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(135deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-a-inner {
  padding: 0 26px 22px;
  font-size: 14px;
  color: var(--text2);
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.faq-item.open .faq-a { max-height: 500px; }

/* ===== CTA Banner ===== */
.cta-banner {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary-tint), #fff);
  border-top: 1px solid var(--border);
}
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(26,74,115,0.25);
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 160px;
  height: 160px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.cta-box h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.cta-box p {
  font-size: 15px;
  color: rgba(255,255,255,0.9);
  max-width: 500px;
  margin: 0 auto 32px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}
.cta-box .btn-light {
  background: #fff;
  color: var(--primary);
  position: relative;
  z-index: 1;
}
.cta-box .btn-light:hover {
  background: var(--primary-tint);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 20px;
}
.footer-brand .logo-text span { color: #B3D1F0; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.65);
  margin-top: 16px;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  transition: all .3s ease;
}
.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-col p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.55);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a {
  color: rgba(255,255,255,0.55);
}
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .process-step::after { display: none; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .search-box { display: none; }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(26,54,93,0.08);
    padding: 12px 24px 20px;
    transform: translateY(-150%);
    transition: transform .35s ease;
    z-index: 99;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav a { padding: 12px 14px; border-radius: 8px; }
  .main-nav a.active::after { display: none; }
  .main-nav a.active { background: var(--primary-tint); }
  .menu-toggle { display: flex; }
  .page-hero h1 { font-size: 34px; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .header-inner { height: 64px; }
  .logo-text { font-size: 16px; }
  .logo-icon { width: 34px; height: 34px; font-size: 15px; }
  .page-hero { padding: 56px 0 48px; }
  .page-hero h1 { font-size: 26px; line-height: 1.4; }
  .hero-subtitle { font-size: 14px; margin-bottom: 24px; }
  .hero-actions { flex-direction: column; align-items: center; gap: 12px; }
  .hero-actions .btn { width: 100%; max-width: 280px; }
  .hero-trust { gap: 20px; }
  .hero-trust span { font-size: 13px; }
  .stats-bar { padding: 24px 0; }
  .stats-grid { display: flex; justify-content: center; gap: 30px; }
  .stat-item { padding: 4px; }
  .stat-num { font-size: 26px; }
  .stat-label { font-size: 12px; }
  .features { padding: 56px 0 48px; }
  .features-grid { grid-template-columns: 1fr; gap: 18px; }
  .feature-card { padding: 28px 24px; }
  .process { padding: 56px 0; }
  .process-grid { grid-template-columns: 1fr; gap: 28px; }
  .process-step { padding: 0 20px; }
  .scenarios { padding: 56px 0; }
  .scenarios-grid { grid-template-columns: 1fr; gap: 18px; }
  .guide-tips { padding: 56px 0; }
  .tips-grid { grid-template-columns: 1fr; gap: 18px; }
  .tip-card { flex-direction: column; padding: 24px; }
  .faq { padding: 56px 0; }
  .section-head h2 { font-size: 24px; }
  .section-head p { font-size: 14px; }
  .faq-q { font-size: 15px; padding: 18px 20px; }
  .faq-a-inner { padding: 0 20px 18px; font-size: 13px; }
  .cta-banner { padding: 48px 0; }
  .cta-box { padding: 40px 24px; border-radius: 18px; }
  .cta-box h2 { font-size: 22px; }
  .cta-box p { font-size: 14px; margin-bottom: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { font-size: 12px; line-height: 1.7; }
}

@media (max-width: 520px) {
  .header-actions .btn-sm { display: none; }
  .stats-grid { gap: 18px; }
}

/* roulang page: category3 */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1A4A73;
  --primary-tint: #EAF1F8;
  --accent: #C59B45;
  --success: #2F855A;
  --danger: #C53030;
  --page-bg: #F5F7FA;
  --card-bg: #ffffff;
  --text-main: #1A202C;
  --text-secondary: #4A5568;
  --text-muted: #A0AEC0;
  --border: #E2E8F0;
  --title-blue: #1A365D;
  --body-text: #333333;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 12px rgba(26, 54, 93, 0.06), 0 1px 3px rgba(26, 54, 93, 0.04);
  --shadow-md: 0 8px 24px rgba(26, 54, 93, 0.12), 0 2px 6px rgba(26, 54, 93, 0.06);
  --font-body: 16px;
  --font-sm: 14px;
  --space-section: 80px;
  --space-section-mobile: 48px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", Inter, "Helvetica Neue", Arial, sans-serif; font-size: var(--font-body); line-height: 1.7; color: var(--body-text); background: var(--page-bg); -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

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

.site-header { position: sticky; top: 0; z-index: 100; background: #ffffff; border-bottom: 1px solid var(--border); box-shadow: 0 2px 8px rgba(26, 54, 93, 0.04); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.logo a { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 38px; height: 38px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; border-radius: 10px; font-size: 18px; flex-shrink: 0; }
.logo-text { font-size: 18px; font-weight: 700; color: var(--title-blue); white-space: nowrap; }
.logo-text span { color: var(--primary); }
.main-nav ul { display: flex; gap: 6px; }
.main-nav a { display: block; padding: 8px 16px; font-size: 15px; color: var(--text-secondary); border-radius: 8px; font-weight: 500; transition: background .2s, color .2s; }
.main-nav a:hover { background: var(--primary-tint); color: var(--primary); }
.main-nav a.active { color: var(--primary); background: var(--primary-tint); position: relative; font-weight: 600; }
.main-nav a.active::after { content: ""; position: absolute; left: 16px; right: 16px; bottom: 0; height: 3px; background: var(--primary); border-radius: 3px 3px 0 0; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box { display: flex; align-items: center; background: var(--page-bg); border: 1px solid var(--border); border-radius: 999px; padding: 0 6px 0 16px; height: 40px; width: 200px; transition: border-color .2s, box-shadow .2s, background .2s; }
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15); background: #fff; }
.search-box input { border: none; outline: none; background: transparent; flex: 1; font-size: 14px; color: var(--text-main); min-width: 0; }
.search-box button { background: var(--primary); color: #fff; border: none; width: 28px; height: 28px; border-radius: 50%; font-size: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: background .2s; }
.search-box button:hover { background: var(--primary-dark); }
.menu-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; width: 42px; height: 42px; font-size: 18px; color: var(--text-main); align-items: center; justify-content: center; transition: background .2s, color .2s; }
.menu-toggle:hover { background: var(--primary-tint); color: var(--primary); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 8px; font-size: 15px; font-weight: 600; line-height: 1; border: none; transition: all .25s ease; }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 6px rgba(43, 108, 176, 0.25); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3); }
.btn-primary:active { transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-tint); color: var(--primary-dark); transform: translateY(-2px); }

.page-hero { position: relative; min-height: 420px; display: flex; align-items: center; overflow: hidden; background-color: var(--primary-tint); }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(234, 241, 248, 0.96) 0%, rgba(255, 255, 255, 0.88) 50%, rgba(234, 241, 248, 0.72) 100%); z-index: 1; }
.hero-content { position: relative; z-index: 2; max-width: 760px; padding: 64px 0; }
.hero-badge { display: inline-block; background: var(--primary); color: #fff; font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 999px; margin-bottom: 20px; letter-spacing: 0.5px; }
.page-hero h1 { font-size: 40px; line-height: 1.25; color: var(--title-blue); font-weight: 700; margin-bottom: 16px; }
.hero-desc { font-size: 16px; color: var(--text-secondary); max-width: 560px; line-height: 1.7; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.section { padding: var(--space-section) 0; }
.section-alt { background: var(--primary-tint); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--title-blue); margin-bottom: 12px; line-height: 1.3; }
.section-head p { font-size: 15px; color: var(--text-secondary); }

.stats-section { padding: 56px 0 0; margin-top: -44px; position: relative; z-index: 5; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stat-card { background: var(--card-bg); border-radius: var(--radius-md); padding: 28px 24px; box-shadow: var(--shadow-sm); text-align: center; border: 1px solid rgba(226, 232, 240, 0.6); transition: box-shadow .25s, transform .25s; }
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.stat-card i { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 22px; background: var(--primary-tint); color: var(--primary); margin: 0 auto 16px; }
.stat-num { font-size: 20px; font-weight: 700; color: var(--title-blue); margin-bottom: 8px; }
.stat-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.content-card { background: var(--card-bg); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid rgba(226, 232, 240, 0.55); transition: transform .25s, box-shadow .25s; }
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-thumb { position: relative; overflow: hidden; aspect-ratio: 16 / 10; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.content-card:hover .card-thumb img { transform: scale(1.03); }
.card-tag { position: absolute; top: 12px; left: 12px; background: rgba(255, 255, 255, 0.92); color: var(--primary); font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; box-shadow: 0 2px 8px rgba(26, 54, 93, 0.12); }
.card-body { padding: 22px 20px 20px; }
.card-body h3 { font-size: 18px; font-weight: 700; color: var(--text-main); margin-bottom: 10px; line-height: 1.4; }
.card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.card-link i { transition: transform .2s; }
.card-link:hover i { transform: translateX(3px); }

.timeline { max-width: 900px; margin: 0 auto; }
.timeline-item { display: flex; gap: 24px; padding: 0 0 36px; position: relative; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ""; position: absolute; left: 27px; top: 60px; bottom: 0; width: 2px; background: var(--border); }
.timeline-item:last-child::before { display: none; }
.timeline-icon { width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 22px; background: var(--card-bg); color: var(--primary); box-shadow: var(--shadow-sm); border: 1px solid var(--border); flex-shrink: 0; position: relative; z-index: 1; }
.timeline-content { flex: 1; background: var(--card-bg); border-radius: var(--radius-md); padding: 24px 28px; box-shadow: var(--shadow-sm); border: 1px solid rgba(226, 232, 240, 0.5); }
.timeline-content h3 { font-size: 17px; font-weight: 700; color: var(--title-blue); margin-bottom: 8px; }
.timeline-content p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scene-card { background: var(--card-bg); border-radius: var(--radius-md); padding: 30px 26px; box-shadow: var(--shadow-sm); border-left: 4px solid var(--primary); transition: transform .25s, box-shadow .25s; }
.scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.scene-num { font-size: 14px; font-weight: 700; color: var(--accent); margin-bottom: 10px; letter-spacing: 1px; }
.scene-card h3 { font-size: 17px; font-weight: 700; color: var(--title-blue); margin-bottom: 10px; }
.scene-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.faq-section { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--card-bg); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); margin-bottom: 14px; overflow: hidden; border: 1px solid rgba(226, 232, 240, 0.5); transition: box-shadow .25s; }
.faq-item.active { box-shadow: var(--shadow-md); }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 24px; background: none; border: none; font-size: 16px; font-weight: 600; color: var(--text-main); text-align: left; }
.faq-question .faq-icon { width: 28px; height: 28px; border-radius: 50%; background: var(--primary-tint); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; transition: transform .3s, background .3s, color .3s; }
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 16px 24px 20px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; border-top: 1px solid #EDF2F7; }
.faq-item.active .faq-answer { max-height: 400px; }

.cta-section { padding: 72px 0; background: var(--primary-tint); }
.cta-content { text-align: center; max-width: 660px; margin: 0 auto; }
.cta-content h2 { font-size: 28px; font-weight: 700; color: var(--title-blue); margin-bottom: 14px; line-height: 1.4; }
.cta-content p { font-size: 15px; color: var(--text-secondary); margin-bottom: 28px; }

.site-footer { background: var(--primary-dark); color: rgba(255, 255, 255, 0.82); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 36px; }
.footer-brand .logo-text { color: #fff; font-size: 18px; }
.footer-brand .logo-text span { color: #8ec5f5; }
.footer-brand p { font-size: 14px; color: rgba(255, 255, 255, 0.68); margin-top: 14px; line-height: 1.7; }
.footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 18px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: rgba(255, 255, 255, 0.68); font-size: 14px; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-col p { font-size: 13px; color: rgba(255, 255, 255, 0.55); line-height: 1.7; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); padding: 18px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, 0.5); }
.footer-bottom a { color: rgba(255, 255, 255, 0.65); }
.footer-bottom a:hover { color: #fff; }

@media (max-width: 1024px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .search-box { width: 160px; }
  .logo-text { font-size: 16px; }
}

@media (max-width: 768px) {
  .section { padding: var(--space-section-mobile) 0; }
  .section-head h2 { font-size: 24px; }
  .section-head { margin-bottom: 32px; }
  .header-inner { height: 64px; }
  .menu-toggle { display: flex; }
  .header-actions .search-box { display: none; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); max-height: 0; overflow: hidden; transition: max-height .3s ease; }
  .main-nav.nav-open { max-height: 360px; }
  .main-nav ul { flex-direction: column; padding: 12px 16px; gap: 4px; }
  .main-nav a { padding: 12px 16px; font-size: 15px; }
  .main-nav a.active::after { display: none; }
  .page-hero { min-height: 340px; }
  .page-hero h1 { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .hero-content { padding: 48px 0; }
  .hero-actions .btn { padding: 11px 22px; font-size: 14px; }
  .stats-section { margin-top: -32px; padding-top: 32px; }
  .stats-grid { grid-template-columns: 1fr; gap: 16px; }
  .stat-card { padding: 24px 20px; }
  .card-grid-4 { grid-template-columns: 1fr; gap: 18px; }
  .timeline-item { gap: 14px; }
  .timeline-icon { width: 46px; height: 46px; border-radius: 12px; font-size: 18px; }
  .timeline-item::before { left: 22px; }
  .timeline-content { padding: 18px 20px; }
  .scene-grid { grid-template-columns: 1fr; gap: 18px; }
  .cta-section { padding: 48px 0; }
  .cta-content h2 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .logo-text { font-size: 15px; }
  .logo-icon { width: 34px; height: 34px; font-size: 16px; }
  .header-actions .btn-sm { padding: 8px 16px; font-size: 13px; }
  .page-hero h1 { font-size: 24px; }
  .hero-badge { font-size: 12px; padding: 4px 12px; }
  .card-body h3 { font-size: 17px; }
  .scene-card { padding: 24px 20px; }
  .faq-question { font-size: 15px; padding: 18px 18px; }
  .faq-answer-inner { padding: 14px 18px 18px; }
}