/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-deep: #1e40af;
  --primary-light: #eff6ff;
  --accent: #f59e0b;
  --accent-deep: #d97706;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1e2a3b;
  --text-secondary: #5a6b7f;
  --border: #e2e8f0;
  --success: #16a34a;
  --info: #0ea5e9;
  --warning: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 1px 2px rgba(15,30,50,.04), 0 8px 24px rgba(15,30,50,.05);
  --shadow-hover: 0 2px 4px rgba(15,30,50,.05), 0 16px 32px rgba(15,30,50,.09);
  --shadow-nav: 0 4px 12px rgba(15,30,50,.06);
  --container: 1200px;
  --transition: 180ms ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
h1, h2, h3 {
  line-height: 1.3;
  font-weight: 700;
}
.hidden {
  display: none !important;
}
/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, .25);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-deep);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(245, 158, 11, .3);
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: none;
  padding: 0 8px;
  height: 40px;
}
.btn-ghost:hover {
  background: var(--primary-light);
}
.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
/* ========== 标签与徽章 ========== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary-deep);
  white-space: nowrap;
}
.tag-accent {
  background: var(--accent);
  color: #fff;
}
.tag-warn {
  background: #fef3c7;
  color: #92400e;
}
/* ========== 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: 64px;
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}
.nav-wrap {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
}
.brand-text {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .5px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
}
.main-nav .nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.main-nav .nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.main-nav .nav-link.active {
  color: var(--primary-deep);
  background: var(--primary-light);
  font-weight: 600;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  height: 38px;
  padding: 0 8px 0 14px;
  width: 220px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
  background: #fff;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: 14px;
  color: var(--text);
}
.search-box .kbd {
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  white-space: nowrap;
}
.quick-link {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.quick-link:hover {
  color: var(--primary);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-menu {
  display: none;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  flex-direction: column;
  gap: 8px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu .nav-link {
  padding: 12px;
  border-radius: var(--radius-md);
  font-size: 16px;
  color: var(--text);
  font-weight: 500;
}
.mobile-menu .nav-link:hover,
.mobile-menu .nav-link.active {
  background: var(--primary-light);
  color: var(--primary-deep);
}
.mobile-menu .btn {
  margin-top: 8px;
  width: 100%;
}
.mobile-search {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-radius: var(--radius-md);
  height: 42px;
  padding: 0 14px;
  gap: 8px;
}
.mobile-search input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: 14px;
}
/* ========== Hero ========== */
.hero {
  position: relative;
  background: var(--bg);
  padding: 72px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.webp");
  background-size: cover;
  background-position: center;
  opacity: .12;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(37, 99, 235, .08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 55% 45%;
  gap: 48px;
  align-items: center;
}
.hero-copy .h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: .5px;
}
.hero-copy .h1 .highlight {
  color: var(--primary);
}
.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.hero-badges {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-badges .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 14px;
  background: rgba(255, 255, 255, .8);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.hero-badges .badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}
/* ===== 直播预告卡 ===== */
.live-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
  overflow: hidden;
}
.live-cover {
  position: relative;
  height: 180px;
  background-image: url("/assets/images/backpic/back-2.webp");
  background-size: cover;
  background-position: center;
}
.live-cover .live-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: .5px;
}
.live-body {
  padding: 24px;
}
.live-countdown-title {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.live-countdown-title::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}
.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.countdown-item {
  background: var(--bg);
  border-radius: var(--radius-md);
  text-align: center;
  padding: 12px 4px;
}
.countdown-item .num {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent-deep);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.countdown-item .unit {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.live-points {
  margin-bottom: 20px;
}
.live-points li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
  padding: 4px 0;
  line-height: 1.6;
}
.live-points li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 8px;
}
.live-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.live-actions .btn {
  flex: 1;
  min-width: 120px;
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  transition: gap var(--transition);
}
.link-arrow:hover {
  gap: 8px;
}
/* ========== 快速入口条 ========== */
.quick-entry {
  padding: 40px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.quick-entry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.quick-entry-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.quick-entry-item:hover {
  background: var(--primary-light);
  border-color: rgba(37, 99, 235, .15);
  box-shadow: var(--shadow-card);
}
.quick-entry-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  background: var(--primary-light);
  color: var(--primary);
}
.quick-entry-info .name {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 2px;
}
.quick-entry-info .desc {
  font-size: 13px;
  color: var(--text-secondary);
}
/* ========== 最新资讯 ========== */
.latest-news {
  padding: 96px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
}
.section-head .section-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}
.section-head .more-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
}
.news-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.feature-news {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-news:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.feature-news .news-cover {
  height: 100%;
  min-height: 160px;
  object-fit: cover;
}
.feature-news .news-body {
  padding: 24px 24px 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}
.feature-news .news-body h3 {
  font-size: 20px;
  line-height: 1.45;
  font-weight: 600;
}
.feature-news .news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}
.news-list {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}
.news-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.news-row:last-child {
  border-bottom: none;
}
.news-row:hover {
  background: var(--primary-light);
}
.news-row .news-title {
  flex: 1;
  font-weight: 500;
  font-size: 15px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-row .news-summary {
  flex: 1.2;
  color: var(--text-secondary);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-row .news-date {
  color: var(--text-secondary);
  font-size: 13px;
  white-space: nowrap;
}
.news-row .news-arrow {
  color: var(--text-secondary);
  font-size: 16px;
  transition: color var(--transition), transform var(--transition);
}
.news-row:hover .news-arrow {
  color: var(--primary);
  transform: translateX(4px);
}
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
  gap: 12px;
  text-align: center;
}
.empty-state .icon {
  font-size: 40px;
}
.empty-state p {
  color: var(--text-secondary);
}
/* ========== 平台优势 ========== */
.advantages {
  padding: 96px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.advantage-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 64px;
}
.advantage-item:last-child {
  margin-bottom: 0;
}
.advantage-item.reverse .advantage-image {
  order: 2;
}
.advantage-item.reverse .advantage-copy {
  order: 1;
}
.advantage-copy h3 {
  font-size: 24px;
  margin-bottom: 16px;
  line-height: 1.4;
}
.advantage-copy p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}
.advantage-list {
  margin-bottom: 20px;
}
.advantage-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 4px 0;
  font-size: 15px;
}
.advantage-list li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}
.advantage-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
}
.advantage-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.stat-item {
  text-align: center;
}
.stat-item .num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-item .label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}
/* ========== FAQ ========== */
.faq-section {
  padding: 96px 0;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover {
  box-shadow: var(--shadow-card);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  user-select: none;
  transition: background var(--transition);
}
.faq-q:hover {
  background: var(--primary-light);
}
.faq-q .faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--transition), background var(--transition);
}
.faq-q .faq-icon::before {
  width: 12px;
  height: 2px;
  top: 9px;
  left: 4px;
}
.faq-q .faq-icon::after {
  width: 2px;
  height: 12px;
  top: 4px;
  left: 9px;
}
.faq-item.open .faq-q .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}
.faq-item.open .faq-q .faq-icon::before {
  background: var(--primary);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-item.open .faq-a {
  max-height: 400px;
}
.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.faq-more {
  text-align: center;
  margin-top: 32px;
}
/* ========== CTA ========== */
.cta-section {
  padding: 80px 0;
  background: var(--primary);
  color: #fff;
  text-align: center;
}
.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 16px;
  opacity: .85;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .btn {
  background: #fff;
  color: var(--primary-deep);
  font-weight: 700;
}
.cta-section .btn:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
}
/* ========== 页脚 ========== */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand {
  margin-bottom: 12px;
}
.footer-brand .footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-status {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.footer-status .online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.footer-status .online::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-secondary);
}
/* ========== 焦点与无障碍 ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}
/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-copy .h1 {
    font-size: 36px;
  }
  .advantage-item {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .advantage-item.reverse .advantage-image {
    order: 0;
  }
  .advantage-item.reverse .advantage-copy {
    order: 0;
  }
  .quick-entry-grid {
    grid-template-columns: 1fr 1fr;
  }
  .search-box {
    width: 180px;
  }
}
@media (max-width: 768px) {
  .main-nav,
  .nav-actions .search-box,
  .nav-actions .quick-link {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-actions {
    margin-left: auto;
  }
  .nav-actions .btn {
    font-size: 14px;
    height: 36px;
    padding: 0 16px;
  }
  .features-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .feature-news {
    grid-template-columns: 1fr;
  }
  .feature-news .news-cover {
    width: 100%;
    height: 160px;
  }
  .feature-news .news-body {
    padding: 0 20px 20px;
  }
  .news-row {
    padding: 16px;
    gap: 10px;
  }
  .news-row .news-summary {
    display: none;
  }
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .hero {
    padding: 48px 0 56px;
  }
  .hero-copy .h1 {
    font-size: 30px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .countdown-item .num {
    font-size: 24px;
  }
  .quick-entry-grid {
    grid-template-columns: 1fr;
  }
  .quick-entry-item {
    padding: 14px;
  }
  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-item .num {
    font-size: 30px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .news-list .news-row {
    flex-wrap: wrap;
  }
  .news-row .news-date {
    margin-left: auto;
  }
  .news-row .news-title {
    flex-basis: 100%;
  }
}

/* roulang page: category1 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --accent-dark: #d97706;
  --bg: #f6f8fb;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-light: #edf1f6;
  --success: #10b981;
  --info: #3b82f6;
  --warning: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(15, 30, 50, 0.04), 0 8px 24px rgba(15, 30, 50, 0.05);
  --shadow-hover: 0 2px 4px rgba(15, 30, 50, 0.05), 0 16px 32px rgba(15, 30, 50, 0.09);
  --shadow-nav: 0 4px 12px rgba(15, 30, 50, 0.06);
  --transition: 150ms ease;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

input {
  font-family: inherit;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn:focus-visible,
.nav-link:focus-visible,
.brand:focus-visible,
.footer-col a:focus-visible,
.search-box input:focus-visible,
.faq-question:focus-visible,
.download-btn:focus-visible,
.step-item:focus-visible,
.menu-toggle:focus-visible,
.version-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

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

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

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

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.2;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
}

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

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 38px;
  padding: 0 10px 0 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box svg {
  flex-shrink: 0;
  width: 15px;
  height: 15px;
  stroke: var(--text-light);
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--text);
  outline: none;
  min-width: 0;
}

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

.search-box .kbd {
  font-size: 11px;
  color: var(--text-light);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  white-space: nowrap;
  font-family: inherit;
}

.header-link {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--transition);
}

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

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

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

.menu-toggle svg {
  width: 22px;
  height: 22px;
  stroke: var(--text);
}

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.7) 0%, rgba(246, 248, 251, 0) 100%);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  padding-top: 48px;
  padding-bottom: 56px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

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

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

.page-hero-content {
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--accent-light);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
  stroke: var(--accent-dark);
}

.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

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

.page-hero p.subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.hero-quick-stats {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stat strong {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.hero-stat span {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== Section ===== */
.section {
  padding-top: 88px;
  padding-bottom: 88px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  position: relative;
}

.section-head h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--primary);
  border-radius: 4px;
  margin-right: 10px;
  vertical-align: -2px;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-top: 8px;
  max-width: 500px;
}

.head-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}

.head-link:hover {
  gap: 8px;
}

.head-link svg {
  width: 16px;
  height: 16px;
}

/* ===== Download Cards ===== */
.download-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.download-version {
  min-width: 130px;
  text-align: left;
}

.download-version .ver-label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.download-version .ver-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font);
  letter-spacing: -0.01em;
}

.download-version .ver-date {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}

.download-info {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-left: 28px;
  border-left: 1px solid var(--border-light);
}

.download-info-item .item-label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 2px;
}

.download-info-item .item-value {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}

.download-action {
  display: flex;
  align-items: center;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 22px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.download-btn:hover {
  background: var(--primary-dark);
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.22);
  transform: translateY(-1px);
}

.download-btn svg {
  width: 16px;
  height: 16px;
  stroke: #fff;
}

.download-btn.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.download-btn.btn-outline:hover {
  background: var(--primary-light);
  box-shadow: none;
}

/* ===== Feature Comparison ===== */
.feature-section {
  background: var(--bg);
  border-top: 1px solid var(--border-light);
  padding-top: 88px;
  padding-bottom: 88px;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}

.feature-card {
  display: flex;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  min-height: 260px;
}

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

.feature-img {
  width: 140px;
  min-height: 120px;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  object-fit: cover;
  flex-shrink: 0;
}

.feature-content {
  flex: 1;
}

.feature-content h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.35;
}

.feature-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  transition: gap var(--transition);
}

.feature-link:hover {
  gap: 8px;
}

.feature-link svg {
  width: 15px;
  height: 15px;
  stroke: var(--primary);
}

/* ===== Steps Section ===== */
.steps-section {
  background: #fff;
  border-top: 1px solid var(--border-light);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step-item {
  position: relative;
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
  font-variant-numeric: tabular-nums;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Notice Panel ===== */
.notice-panel {
  background: var(--accent-light);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-top: 48px;
  border: 1px solid rgba(245, 158, 11, 0.2);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.notice-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.notice-icon svg {
  width: 18px;
  height: 18px;
  stroke: #fff;
}

.notice-content {
  flex: 1;
}

.notice-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #92400e;
}

.notice-content ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.notice-content li {
  font-size: 14px;
  color: #78350f;
  line-height: 1.6;
  position: relative;
  padding-left: 16px;
}

.notice-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
  border-top: 1px solid var(--border-light);
}

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

.faq-item {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: 0 1px 2px rgba(15, 30, 50, 0.03);
  transition: box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

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

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
  cursor: pointer;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}

.faq-icon svg {
  width: 14px;
  height: 14px;
  stroke: var(--text-secondary);
  transition: transform var(--transition);
}

.faq-item.open .faq-icon {
  background: var(--primary);
}

.faq-item.open .faq-icon svg {
  transform: rotate(45deg);
  stroke: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 200ms ease;
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  margin-top: 0;
}

.faq-answer-inner a {
  color: var(--primary);
  font-weight: 500;
}

.faq-answer-inner a:hover {
  text-decoration: underline;
}

.faq-more {
  text-align: center;
  margin-top: 28px;
}

/* ===== CTA ===== */
.cta-section {
  padding-top: 88px;
  padding-bottom: 88px;
}

.cta-card {
  background: linear-gradient(180deg, #1e3a8a 0%, #1d4ed8 100%);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
}

.cta-card .container-inner {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}

.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.cta-card p {
  font-size: 15px;
  color: #bfdbfe;
  line-height: 1.7;
  margin-bottom: 28px;
}

.cta-card .btn {
  min-width: 160px;
}

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

.cta-card .btn-white:hover {
  background: #f0f5ff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ===== Footer ===== */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--border-light);
  padding-top: 64px;
}

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

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

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color var(--transition), padding-left var(--transition);
}

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

.footer-status {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--success);
  background: rgba(16, 185, 129, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.online::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--text-light);
  flex-wrap: wrap;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .search-box {
    width: 160px;
  }

  .header-link {
    display: none;
  }

  .header-inner {
    gap: 16px;
  }

  .main-nav {
    gap: 2px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 13px;
  }

  .download-card {
    flex-wrap: wrap;
    gap: 16px;
  }

  .download-info {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--border-light);
    padding-top: 16px;
    order: 3;
    width: 100%;
    grid-template-columns: repeat(3, 1fr);
  }

  .download-action {
    margin-left: auto;
  }

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

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

@media (max-width: 768px) {
  .section {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .section-head {
    margin-bottom: 28px;
  }

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

  .header-inner {
    height: 56px;
  }

  .brand-text {
    font-size: 15px;
  }

  .brand-icon {
    width: 30px;
    height: 30px;
    font-size: 15px;
  }

  .search-box {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-nav);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 200ms ease;
    z-index: 99;
    overflow-y: auto;
    max-height: calc(100vh - 56px);
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-link {
    padding: 14px 12px;
    font-size: 15px;
    border-radius: var(--radius-md);
  }

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

  .menu-toggle {
    display: inline-flex;
  }

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

  .page-hero .container {
    padding-top: 32px;
    padding-bottom: 40px;
  }

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

  .page-hero p.subtitle {
    font-size: 15px;
  }

  .hero-quick-stats {
    gap: 20px;
  }

  .hero-stat strong {
    font-size: 20px;
  }

  .download-card{
    padding: 20px;
  }

  .download-info {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .download-version {
    min-width: 100px;
  }

  .download-version .ver-num {
    font-size: 18px;
  }

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

  .feature-card {
    padding: 24px;
    min-height: auto;
    flex-direction: column;
  }

  .feature-img {
    width: 100%;
    height: 180px;
  }

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

  .notice-panel {
    padding: 20px;
    flex-direction: column;
    gap: 12px;
  }

  .cta-card {
    padding: 40px 24px;
  }

  .cta-card h2 {
    font-size: 24px;
  }

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

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

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

  .page-hero h1 {
    font-size: 25px;
  }

  .download-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .download-version {
    min-width: auto;
  }

  .download-info {
    width: 100%;
  }

  .download-action {
    width: 100%;
    margin-left: 0;
  }

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

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-card {
    padding: 20px;
  }

  .notice-content li {
    font-size: 13px;
  }

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

  .faq-answer-inner {
    padding: 12px 16px 18px;
    font-size: 13px;
  }

  .cta-card {
    padding: 32px 16px;
  }

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

/* roulang page: article */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-accent: #f59e0b;
  --color-accent-light: #fef3c7;
  --color-bg: #f4f7fb;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --color-success: #10b981;
  --color-info: #3b82f6;
  --color-warning: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(15,30,50,0.04), 0 8px 24px rgba(15,30,50,0.05);
  --shadow-md: 0 2px 4px rgba(15,30,50,0.05), 0 16px 32px rgba(15,30,50,0.09);
  --shadow-nav: 0 4px 12px rgba(15,30,50,0.06);
  --transition: 150ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button, input {
  font: inherit;
  color: inherit;
}

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

a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

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

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

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary-light);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}

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

.badge-accent {
  background: var(--color-accent-light);
  color: #b45309;
}

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

.brand-text {
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}

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

.nav-link.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.mobile-cta {
  display: none;
  margin-top: 12px;
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  width: 200px;
  height: 40px;
  background: #f1f5f9;
  border-radius: var(--radius-md);
  padding: 0 12px;
  gap: 8px;
  border: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: #fff;
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

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

.search-box input::placeholder {
  color: #94a3b8;
}

.kbd {
  font-size: 12px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.account-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 28px 0 20px;
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

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

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

.breadcrumb .sep {
  color: #cbd5e1;
}

.breadcrumb .current {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 260px;
}

/* 文章卡片 */
.article-wrapper {
  max-width: 980px;
  margin: 0 auto;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 48px 56px;
}

.article-header {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 40px;
}

.article-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.article-header h1 {
  font-size: 36px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

.article-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #cbd5e1;
}

/* 正文排版 */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--color-primary);
  line-height: 1.4;
  color: var(--color-text);
}

.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
  line-height: 1.4;
  color: var(--color-text);
}

.article-content p {
  margin: 0 0 24px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
  padding-left: 2px;
}

.article-content ul li::marker {
  color: var(--color-primary);
}

.article-content ol li::marker {
  color: var(--color-primary);
  font-weight: 600;
}

.article-content blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  border-radius: 8px;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.article-content img {
  border-radius: 12px;
  margin: 24px auto;
  box-shadow: var(--shadow-sm);
}

.article-content figure {
  margin: 24px 0;
}

.article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.article-content code {
  background: #f1f5f9;
  border-radius: 4px;
  padding: 2px 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
  color: var(--color-primary-dark);
}

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

.article-content a:hover {
  text-decoration: underline;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.article-content th,
.article-content td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
}

.article-content th {
  background: var(--color-primary-light);
  font-weight: 600;
}

/* 空状态 */
.article-empty {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 72px 24px;
}

.article-empty .empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 28px;
  font-weight: 700;
}

.article-empty h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* 相关推荐 */
.related-section {
  margin-top: 48px;
}

.related-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.related-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
}

.related-header a {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  transition: opacity var(--transition);
}

.related-header a:hover {
  opacity: 0.75;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.related-card-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.related-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 200ms ease;
}

.related-card:hover .related-card-cover img {
  transform: scale(1.02);
}

.related-card-cover .badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(4px);
}

.related-card-body {
  padding: 20px;
}

.related-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-text);
  margin-bottom: 8px;
  transition: color var(--transition);
}

.related-card:hover .related-card-body h3 {
  color: var(--color-primary);
}

.related-card-body .date {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* 文章底部导航 */
.post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.post-nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.post-nav-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

/* CTA */
.cta-section {
  margin-top: 80px;
  background: var(--color-primary-light);
  border-top: 1px solid var(--color-border);
}

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 72px 24px 80px;
}

.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.cta-inner p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.cta-form input {
  flex: 1;
  min-width: 0;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 0 16px;
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cta-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.cta-form input::placeholder {
  color: #94a3b8;
}

/* 页脚 */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 56px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border-light);
}

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

.footer-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  transition: color var(--transition);
}

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

.footer-status .online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-success);
  margin-bottom: 8px;
}

.footer-status .online::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.footer-status p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .search-box {
    width: 160px;
  }

  .header-inner {
    gap: 16px;
  }

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

  .article-card {
    padding: 40px;
  }
}

@media (max-width: 767px) {
  .header-inner {
    height: 56px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-nav);
  }

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

  .nav-link {
    padding: 12px 14px;
    font-size: 15px;
  }

  .mobile-cta {
    display: inline-flex;
    margin-top: 16px;
  }

  .header-actions {
    gap: 8px;
  }

  .search-box,
  .account-link {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .breadcrumb {
    padding: 20px 0 16px;
  }

  .article-card {
    padding: 24px 20px;
    border-radius: var(--radius-lg);
  }

  .article-header {
    margin-bottom: 28px;
    padding-bottom: 24px;
  }

  .article-header h1 {
    font-size: 26px;
    line-height: 1.4;
  }

  .article-content {
    font-size: 15px;
  }

  .article-content h2 {
    font-size: 21px;
    margin-top: 32px;
  }

  .article-content h3 {
    font-size: 18px;
  }

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

  .related-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .post-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .post-nav-link {
    text-align: center;
  }

  .cta-inner {
    padding: 56px 20px 64px;
  }

  .cta-inner h2 {
    font-size: 24px;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .brand-text {
    font-size: 16px;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .header-inner {
    gap: 8px;
  }

  .container {
    padding: 0 16px;
  }

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

  .article-tags {
    gap: 8px;
  }

  .related-card-body {
    padding: 16px;
  }

  .related-card-cover .badge {
    left: 10px;
    bottom: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category2 */
:root {
  --primary: #2456b3;
  --primary-dark: #1b4390;
  --primary-light: #eaf0fb;
  --primary-ring: rgba(36, 86, 179, 0.2);
  --accent: #f0a020;
  --accent-light: #fdf1de;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --text: #26344a;
  --text-secondary: #63748e;
  --border: #dde5f0;
  --success: #2d9d6e;
  --info: #3b7ad9;
  --warning: #d9841f;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 1px 2px rgba(15, 30, 50, 0.04), 0 8px 24px rgba(15, 30, 50, 0.05);
  --shadow-hover: 0 2px 4px rgba(15, 30, 50, 0.05), 0 16px 32px rgba(15, 30, 50, 0.09);
  --shadow-nav: 0 4px 12px rgba(15, 30, 50, 0.06);
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}

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

ul,
ol {
  list-style: none;
}

button,
input {
  font: inherit;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  background: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: all var(--transition);
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(15, 30, 50, 0.1), 0 6px 14px rgba(36, 86, 179, 0.18);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(15, 30, 50, 0.08), 0 10px 20px rgba(36, 86, 179, 0.22);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-outline {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

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

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 2px rgba(15, 30, 50, 0.08), 0 6px 14px rgba(240, 160, 32, 0.2);
}

.btn-accent:hover {
  background: #d9841f;
  transform: translateY(-1px);
}

.btn-lg {
  height: 52px;
  padding: 0 34px;
  font-size: 16px;
  border-radius: 12px;
}

.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

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

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(36, 86, 179, 0.25);
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}

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

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 38px;
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0 10px;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.search-box input {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 14px;
}

.search-box input::placeholder {
  color: #9aabc0;
}

.search-kbd {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
}

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

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

/* Page Hero */
.page-hero {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 56px 0 48px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(36, 86, 179, 0.07) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

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

.breadcrumb-sep {
  color: #b0bdd0;
}

.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  letter-spacing: 0.01em;
}

.page-hero .hero-sub {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 720px;
}

/* Guide Layout */
.guide-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 56px;
  align-items: start;
}

.guide-toc {
  position: sticky;
  top: 90px;
}

.toc-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-card);
}

.toc-inner h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  padding: 0 8px 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.toc-inner ul li a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: all var(--transition);
}

.toc-inner ul li a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.toc-inner ul li a.active {
  color: var(--primary);
  background: var(--primary-light);
  border-left-color: var(--primary);
  font-weight: 600;
}

.toc-tip {
  margin-top: 16px;
  background: var(--accent-light);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.6;
  color: #8a5a12;
}

/* Guide Content */
.guide-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 48px 52px;
  min-width: 0;
}

.guide-content .lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.guide-section {
  margin-bottom: 48px;
}

.guide-section h2 {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 16px;
}

.guide-section h2::before {
  content: "";
  display: block;
  width: 4px;
  height: 26px;
  background: var(--primary);
  border-radius: 4px;
  margin-top: 4px;
  flex-shrink: 0;
}

.guide-section h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 12px;
  line-height: 1.4;
}

.guide-section p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
  margin-bottom: 16px;
}

.guide-section ul {
  margin: 12px 0 20px;
}

.guide-section ul li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 8px;
}

.guide-section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.guide-figure {
  margin: 24px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
}

.guide-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
}

.guide-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  background: var(--surface);
}

.tip-box {
  display: flex;
  gap: 12px;
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 16px 18px;
  margin: 24px 0;
}

.tip-box svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.tip-box p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.tip-box strong {
  color: var(--primary);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.step-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
}

.step-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* Tag Cloud */
.tag-cloud {
  margin-top: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.tag-cloud h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

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

/* CTA Section */
.cta-section {
  background: var(--primary);
  color: #fff;
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.cta-inner {
  text-align: center;
  position: relative;
}

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

.cta-inner p {
  font-size: 16px;
  line-height: 1.7;
  opacity: 0.85;
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-inner .btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.cta-inner .btn-white:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 320px;
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
}

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

.footer-status {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.footer-status .online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--success);
  margin-bottom: 8px;
}

.footer-status .online::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(45, 157, 110, 0.15);
}

.footer-status p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Focus visible */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Scroll margin for anchor targets */
.guide-section {
  scroll-margin-top: 80px;
}

/* Responsive */
@media (max-width: 1024px) {
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-toc {
    display: none;
  }

  .guide-content {
    padding: 40px;
  }

  .search-box {
    width: 160px;
  }

  .brand-text {
    font-size: 15px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    gap: 12px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-nav);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 4px;
    display: none;
    z-index: 99;
  }

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

  .nav-link {
    height: 46px;
    padding: 0 14px;
    font-size: 15px;
  }

  .search-box {
    display: none;
  }

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

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .page-hero {
    padding: 40px 0 36px;
  }

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

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

  .guide-content {
    padding: 28px 22px;
    border-radius: var(--radius-lg);
  }

  .guide-section h2 {
    font-size: 21px;
  }

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

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

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }

  .brand-text {
    font-size: 14px;
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
    border-radius: 8px;
  }

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

  .guide-content {
    padding: 24px 18px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* roulang page: category3 */
:root {
  --primary: #1e5ae8;
  --primary-dark: #1646c2;
  --primary-light: #eaf1fe;
  --accent: #f59f0c;
  --accent-dark: #d98a06;
  --accent-light: #fff4e0;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #17233d;
  --text-secondary: #5c6b84;
  --border: #dfe7f0;
  --success: #10b981;
  --info: #3b82f6;
  --warning: #f59f0c;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 30, 50, 0.04), 0 8px 24px rgba(15, 30, 50, 0.05);
  --shadow-md: 0 2px 4px rgba(15, 30, 50, 0.05), 0 16px 32px rgba(15, 30, 50, 0.09);
  --shadow-nav: 0 4px 12px rgba(15, 30, 50, 0.06);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

input {
  font-family: inherit;
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
}

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

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-icon {
  width: 35px;
  height: 35px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 10px rgba(30, 90, 232, 0.25);
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
  white-space: nowrap;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.desktop-nav .nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.18s, background 0.18s;
}

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

.desktop-nav .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 38px;
  padding: 0 10px 0 12px;
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  transition: border-color 0.18s, box-shadow 0.18s;
}

.nav-search svg {
  flex-shrink: 0;
}

.nav-search input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 13px;
  color: var(--text);
}

.nav-search input::placeholder {
  color: #9aa8ba;
}

.nav-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 90, 232, 0.14);
  background: #fff;
}

.search-kbd {
  flex-shrink: 0;
  font-size: 11px;
  color: #8a97ab;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
  line-height: 1.5;
  font-family: inherit;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 18px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background 0.18s, transform 0.15s, box-shadow 0.18s;
  white-space: nowrap;
}

.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(30, 90, 232, 0.28);
}

.header-cta:active {
  transform: translateY(0);
}

.user-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.18s;
  white-space: nowrap;
}

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

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: var(--text);
  background: transparent;
  transition: background 0.18s;
}

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

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: background 0.18s, transform 0.15s, box-shadow 0.18s, border-color 0.18s;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(30, 90, 232, 0.28);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

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

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(245, 159, 12, 0.3);
}

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

.btn-white:hover {
  background: #eef2fb;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

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

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  background: linear-gradient(180deg, #eef3fa 0%, #f7f9fd 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 56px 0 64px;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(30, 90, 232, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.4;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.breadcrumb a {
  transition: color 0.18s;
}

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

.breadcrumb .sep {
  color: #b0bdce;
}

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

.page-hero-content {
  display: flex;
  align-items: center;
  gap: 40px;
  justify-content: space-between;
}

.page-hero-copy {
  max-width: 640px;
}

.page-hero-copy h1 {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 14px;
}

.page-hero-copy h1 span {
  color: var(--primary);
}

.page-hero-copy p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 4px;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 22px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.hero-badge .shield-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  display: grid;
  place-items: center;
  color: var(--primary);
}

.hero-badge .shield-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.hero-badge .shield-sub {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== Section Common ===== */
.section {
  padding: 88px 0;
}

.section-header {
  max-width: 720px;
  margin-bottom: 44px;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.section-header h2 {
  font-size: 30px;
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== Self-Check List ===== */
.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.check-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.check-list {
  margin-top: 8px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

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

.check-item .check-box {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  border: 2px solid #c4d0de;
  background: #fff;
  flex-shrink: 0;
  margin-top: 3px;
  position: relative;
  transition: background 0.2s, border-color 0.2s;
}

.check-item.checked .check-box {
  background: var(--primary);
  border-color: var(--primary);
}

.check-item.checked .check-box::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.check-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.check-item-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.check-img-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.check-img-wrap img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.check-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(23, 35, 61, 0.08) 100%);
}

.check-img-tag {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(255, 255, 255, 0.94);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  z-index: 2;
  backdrop-filter: blur(4px);
}

/* ===== Steps ===== */
.steps-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.step-card {
  padding: 32px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  position: relative;
}

.step-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: #c7d5e8;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 12px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 18px;
}

.step-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.step-card .step-icon {
  position: absolute;
  top: 28px;
  right: 26px;
  color: #c9d6e4;
}

.step-card .step-icon svg {
  width: 26px;
  height: 26px;
}

/* ===== Stats ===== */
.stats-strip {
  background: var(--primary);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 38px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.stat-item .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 6px;
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.faq-item:hover {
  border-color: #c7d5e8;
}

.faq-item.active {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.18s;
}

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

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--bg);
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  font-size: 20px;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.25s, background 0.2s, color 0.2s;
  line-height: 1;
}

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

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

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

.faq-a-inner a {
  color: var(--primary);
  font-weight: 500;
}

.faq-a-inner a:hover {
  text-decoration: underline;
}

/* ===== Contact Card ===== */
.contact-section {
  padding: 96px 0 72px;
}

.contact-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.contact-card h3 {
  font-size: 24px;
  margin-bottom: 10px;
}

.contact-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
  max-width: 640px;
}

.contact-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.contact-link {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.18s;
  white-space: nowrap;
}

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

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

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.5;
}

.cta-section .container {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
}

.cta-section h2 {
  font-size: 34px;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.cta-buttons .btn:focus-visible {
  outline-color: #fff;
}

/* ===== Footer ===== */
.site-footer {
  background: #f9fbfd;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color 0.18s;
}

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

.footer-status {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.footer-status .online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--success);
  margin-bottom: 8px;
}

.footer-status .online::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
}

.footer-status p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #8a97ab;
}

.footer-bottom a {
  color: #8a97ab;
}

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

/* ===== Focus States ===== */
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

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

  .nav-toggle {
    display: inline-flex;
  }

  .nav-search {
    width: 160px;
  }

  .desktop-nav.open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .desktop-nav.open .nav-link {
    padding: 12px 16px;
    font-size: 15px;
  }

  .page-hero-content {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

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

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

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

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

  .check-card {
    padding: 24px;
  }

  .check-img-wrap img {
    height: 260px;
  }

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

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

  .stat-item .stat-number {
    font-size: 30px;
  }

  .contact-card {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .contact-actions .btn {
    flex: 1;
    min-width: 140px;
  }

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

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

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

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

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }

  .header-actions .user-link {
    display: none;
  }

  .nav-search {
    width: 42px;
    padding: 0;
    justify-content: center;
    background: var(--bg);
  }

  .nav-search input,
  .nav-search .search-kbd {
    display: none;
  }

  .nav-search:focus-within {
    position: absolute;
    right: 76px;
    left: 18px;
    width: auto;
    padding: 0 12px;
    justify-content: flex-start;
  }

  .nav-search:focus-within input {
    display: block;
  }

  .page-hero-copy h1 {
    font-size: 27px;
  }

  .hero-badge {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}