/* roulang page: index */
:root {
  --brand: #1B6BBF;
  --brand-hover: #155E9E;
  --brand-soft: #EAF2FB;
  --accent: #18A38B;
  --accent-hover: #128372;
  --accent-soft: #E3F5F1;
  --bg: #F6F9FC;
  --card-bg: #FFFFFF;
  --text: #1F2A3D;
  --text-secondary: #5E6E85;
  --border: #E2EAF2;
  --success: #24965C;
  --warning: #D9830F;
  --error: #CC3A3A;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 999px;
  --shadow-card: 0 1px 2px rgba(16,42,67,.04), 0 8px 24px rgba(16,42,67,.06);
  --shadow-hover: 0 12px 32px rgba(16,42,67,.10);
  --transition: all .3s ease;
  --font-stack: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

h1 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: 0.01em;
}

h2 {
  font-size: clamp(22px, 2.5vw, 28px);
  margin-bottom: 16px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 15px;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  font-size: 15px;
}

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

/* 左侧导航 */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  height: 100vh;
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-brand {
  height: 72px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-brand .logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.sidebar-brand .logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.sidebar-brand .logo-badge {
  font-size: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 999px;
  line-height: 1.4;
  font-weight: 500;
  flex-shrink: 0;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.sidebar-nav .nav-group-title {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 12px 12px 6px;
  font-weight: 500;
}

.sidebar-nav a.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 14px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 2px;
  transition: var(--transition);
}

.sidebar-nav a.nav-item .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-nav a.nav-item:hover {
  background: var(--brand-soft);
  color: var(--brand);
}

.sidebar-nav a.nav-item.active {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 12px rgba(27,107,191,.25);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-footer a {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0;
}

.sidebar-footer a:hover {
  color: var(--brand);
}

.sidebar-footer .copyright {
  font-size: 12px;
  color: #9AABC0;
  margin-top: 8px;
  line-height: 1.5;
}

/* 移动端顶栏 */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 200;
}

.mobile-header .logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}

.mobile-header .logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.mobile-header .logo-badge {
  font-size: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 999px;
  font-weight: 500;
}

/* ==================== 补充样式 ==================== */

.main-content {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Hero */
.hero {
  position: relative;
  padding: 72px 0 56px;
  background: linear-gradient(135deg, rgba(27,107,191,.06), rgba(24,163,139,.04));
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 55fr 45fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.hero-text h1 {
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 28px;
}

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

.hero-visual {
  position: relative;
}

.hero-img {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

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

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

.btn-primary:hover {
  background: var(--brand-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(27,107,191,.25);
}

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

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

.btn-secondary:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
  transform: translateY(-1px);
}

.btn-lg {
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
}

.btn-download {
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
  min-width: 160px;
}

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

.btn-light:hover {
  background: var(--brand-soft);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(255,255,255,.2);
}

/* 板块通用 */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
}

.features {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

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

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon.blue {
  background: var(--brand-soft);
  color: var(--brand);
}

.feature-icon.green {
  background: var(--accent-soft);
  color: var(--accent);
}

.feature-icon.brand {
  background: var(--brand);
  color: #fff;
}

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.65;
}

/* 轮播 */
.carousel-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.carousel-wrapper {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
}

.carousel-track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 12px 4px 20px;
  scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-card {
  flex: 0 0 300px;
  scroll-snap-align: center;
  background: var(--card-bg);
  border-radius: 14px;
  padding: 12px 12px 20px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.carousel-card img {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: 10px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
}

.carousel-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  padding: 0 8px;
}

.carousel-card p {
  font-size: 14px;
  line-height: 1.6;
  padding: 0 8px;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: var(--transition);
  z-index: 2;
  box-shadow: var(--shadow-card);
}

.carousel-arrow:hover {
  background: var(--brand-soft);
  color: var(--brand);
}

.carousel-arrow.prev {
  left: -52px;
}

.carousel-arrow.next {
  right: -52px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #C7D6E4;
  transition: var(--transition);
  cursor: pointer;
}

.carousel-dots .dot.active {
  width: 24px;
  background: var(--brand);
}

/* 系统要求 */
.sysreq {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.sysreq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.sysreq-text h3 {
  margin-bottom: 16px;
}

.version-list {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}

.version-list li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}

.version-list li:last-child {
  border-bottom: none;
}

.version-list li span:first-child {
  color: var(--text-secondary);
}

.version-list li span:last-child {
  font-weight: 500;
  color: var(--text);
}

.sysreq-text p {
  font-size: 14px;
}

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

.sysreq-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.sysreq-card:hover {
  box-shadow: var(--shadow-hover);
}

.sysreq-card.recommended {
  border-top: 3px solid var(--accent);
}

.sysreq-card h3 {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sysreq-card.recommended h3::after {
  content: "推荐";
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 500;
}

.sysreq-card ul li {
  display: flex;
  flex-direction: column;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.sysreq-card ul li:last-child {
  border-bottom: none;
}

.sysreq-card ul li span:first-child {
  color: var(--text-secondary);
  font-size: 12px;
}

.sysreq-card ul li span:last-child {
  font-weight: 500;
  color: var(--text);
  margin-top: 2px;
}

/* 最新资讯 */
.latest {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

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

.news-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.news-thumb {
  display: block;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  transition: transform .3s ease;
}

.news-card:hover .news-thumb img {
  transform: scale(1.02);
}

.news-body {
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-body h3 {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 8px;
}

.news-body h3 a {
  color: var(--text);
}

.news-body h3 a:hover {
  color: var(--brand);
}

.news-body p {
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.news-meta .date {
  font-size: 12px;
  color: var(--text-secondary);
}

.news-meta .tag {
  font-size: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}

.news-meta .read-link {
  margin-left: auto;
  font-size: 13px;
  font-weight: 500;
  color: var(--brand);
  transition: var(--transition);
}

.news-meta .read-link:hover {
  transform: translateX(4px);
  color: var(--brand-hover);
}

.empty-state {
  grid-column: 1 / -1;
  border: 1px dashed #C7D6E4;
  border-radius: var(--radius-card);
  padding: 60px 20px;
  text-align: center;
  background: var(--bg);
}

.empty-state svg {
  margin-bottom: 12px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 评价墙 */
.testimonials {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg), #fff);
}

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

.testimonial-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.testimonial-card.alt {
  background: var(--brand-soft);
  border-color: transparent;
}

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

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.testimonial-user .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
}

.testimonial-user strong {
  display: block;
  font-size: 15px;
}

.stars {
  color: #F5A623;
  font-size: 14px;
  letter-spacing: 2px;
}

.testimonial-card > p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
  color: var(--text);
}

.testimonial-card .source {
  font-size: 12px;
  color: var(--text-secondary);
}

/* 下载区 */
.download {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.download-inner {
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(27,107,191,.05), rgba(24,163,139,.03));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 56px 32px;
}

.download-inner h2 {
  margin-bottom: 10px;
}

.download-inner > p {
  max-width: 520px;
  margin: 0 auto 24px;
}

.download-buttons {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.version-note {
  font-size: 13px;
  color: var(--text-secondary);
}

/* FAQ */
.faq {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  text-align: left;
  transition: var(--transition);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

.faq-icon::before {
  width: 12px;
  height: 2px;
  top: 9px;
  left: 4px;
}

.faq-icon::after {
  width: 2px;
  height: 12px;
  top: 4px;
  left: 9px;
}

.faq-item.open .faq-icon::after {
  opacity: 0;
}

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

.faq-answer {
  display: none;
  padding: 0 0 16px;
}

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

.faq-answer p {
  font-size: 14px;
  line-height: 1.7;
}

/* CTA */
.cta-section {
  padding: 80px 0;
}

.cta-box {
  text-align: center;
  background: var(--brand);
  border-radius: 20px;
  padding: 56px 32px;
  color: #fff;
}

.cta-box h2 {
  color: #fff;
  margin-bottom: 10px;
}

.cta-box p {
  color: rgba(255,255,255,.85);
  max-width: 480px;
  margin: 0 auto 24px;
}

/* 页脚 */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 48fr 26fr 26fr;
  gap: 32px;
  padding: 48px 32px 32px;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 320px;
}

.footer-links h4,
.footer-contact h4 {
  margin-bottom: 16px;
}

.footer-links ul li,
.footer-contact ul li {
  padding: 4px 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-links ul li a {
  color: var(--text-secondary);
}

.footer-links ul li a:hover {
  color: var(--brand);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 32px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
}

/* 移动端抽屉 */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--card-bg);
  z-index: 300;
  padding: 24px;
  flex-direction: column;
}

.mobile-drawer.active {
  display: flex;
}

.mobile-drawer .drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 56px;
  margin-bottom: 24px;
}

.mobile-drawer .drawer-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text);
  font-size: 24px;
  border: 1px solid var(--border);
}

.mobile-drawer a.drawer-link {
  display: block;
  font-size: 24px;
  font-weight: 600;
  padding: 14px 0;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.mobile-drawer a.drawer-link:hover,
.mobile-drawer a.drawer-link.active {
  color: var(--brand);
}

.mobile-drawer .drawer-cta {
  margin-top: auto;
  display: block;
}

/* ==================== 响应式 ==================== */

@media (max-width: 1023px) {
  .sidebar {
    display: none;
  }

  .mobile-header {
    display: flex;
  }

  .main-content {
    margin-left: 0;
    padding-top: 56px;
  }

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

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

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

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

  .carousel-arrow {
    display: none;
  }

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

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

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

  .features-grid,
  .news-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .sysreq-cards,
  .download-buttons {
    grid-template-columns: 1fr;
    flex-direction: column;
    gap: 16px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    padding: 32px 16px 24px;
  }

  .hero {
    padding: 48px 0 40px;
  }

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

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

  .features,
  .carousel-section,
  .sysreq,
  .latest,
  .testimonials,
  .download,
  .faq,
  .cta-section {
    padding: 48px 0;
  }

  .carousel-card {
    flex: 0 0 80vw;
  }

  .section-header {
    text-align: left;
    margin-bottom: 28px;
  }

  .section-header p {
    margin: 0;
  }
}

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

/* roulang page: category1 */
:root {
  --brand: #1B6BBF;
  --brand-hover: #155E9E;
  --brand-soft: #EAF2FB;
  --accent: #18A38B;
  --accent-hover: #12856F;
  --accent-soft: #E3F5F1;
  --bg: #F6F9FC;
  --card-bg: #FFFFFF;
  --text: #1F2A3D;
  --text-secondary: #5E6E85;
  --border: #E2EAF2;
  --success: #24965C;
  --warning: #D9830F;
  --error: #CC3A3A;
  --star: #F5A623;
  --radius-lg: 14px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-md: 0 1px 2px rgba(16,42,67,.04), 0 8px 24px rgba(16,42,67,.06);
  --shadow-lg: 0 12px 32px rgba(16,42,67,.10);
  --sidebar-w: 220px;
  --spacing-section: 80px;
  --font-stack: PingFang SC, Hiragino Sans GB, Microsoft YaHei, Noto Sans CJK SC, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  margin: 0;
}
img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-hover); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* ===== Sidebar Layout ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: #fff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0 16px 20px;
  z-index: 100;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 8px 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.logo-icon {
  width: 28px; height: 28px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}
.logo-text { font-size: 16px; font-weight: 600; color: var(--text); white-space: nowrap; }
.logo-badge {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
  font-weight: 500;
}
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 2px; overflow-y: auto; }
.nav-group-title {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: none;
  letter-spacing: .5px;
  padding: 16px 12px 6px;
  font-weight: 500;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  line-height: 44px;
  transition: background .2s ease, color .2s ease;
}
.nav-item:hover { background: var(--brand-soft); color: var(--brand); }
.nav-item.active { background: var(--brand); color: #fff; }
.nav-item.active .nav-icon { color: #fff; }
.nav-icon { display: flex; align-items: center; justify-content: center; color: var(--text-secondary); flex-shrink: 0; }
.nav-item:hover .nav-icon { color: var(--brand); }
.sidebar-footer { padding-top: 12px; border-top: 1px solid var(--border); margin-top: 8px; }
.sidebar-copyright { font-size: 12px; color: var(--text-secondary); padding: 0 8px; line-height: 1.5; }

.main-wrapper { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }

/* ===== Topbar (mobile) ===== */
.topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}
.topbar-brand { display: flex; align-items: center; gap: 8px; }
.hamburger {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 20px;
}
.drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: #fff;
  z-index: 200;
  padding: 24px;
  display: none;
  overflow-y: auto;
}
.drawer.open { display: block; }
.drawer-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.drawer-close {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius-sm);
  font-size: 20px;
  color: var(--text);
}
.drawer-nav { display: flex; flex-direction: column; gap: 8px; }
.drawer-nav .nav-item {
  height: 52px;
  font-size: 18px;
  padding: 0 8px;
  line-height: 52px;
}
.drawer-cta {
  position: absolute;
  bottom: 32px; left: 24px; right: 24px;
}
.drawer-cta .btn { width: 100%; justify-content: center; }

/* ===== Page Header (紧凑标题区) ===== */
.page-header {
  padding: 48px 0 36px;
  background: linear-gradient(135deg, var(--brand-soft) 0%, #f0f6fc 60%, var(--accent-soft) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-header::after {
  content: "";
  position: absolute;
  right: -80px; top: -60px;
  width: 300px; height: 300px;
  background: url('/assets/images/backpic/back-1.webp') no-repeat center / cover;
  opacity: .12;
  border-radius: 50%;
  pointer-events: none;
}
.page-header-inner { position: relative; z-index: 2; }
.breadcrumb {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { color: #C0CCDA; }
.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.page-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 720px;
}
.header-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
  padding: 4px 14px;
  border-radius: 999px;
  font-weight: 400;
}
.tag::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== Section ===== */
.section { padding: var(--spacing-section) 0; }
.section-head { margin-bottom: 36px; }
.section-head h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.section-head p { color: var(--text-secondary); font-size: 15px; max-width: 640px; }
.section-divider { border: none; border-top: 1px solid var(--border); margin: 0 32px; }

/* ===== Cards Grid ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: box-shadow .3s ease, transform .3s ease;
  display: flex;
  flex-direction: column;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.card-thumb { position: relative; overflow: hidden; aspect-ratio: 16 / 9; background: var(--brand-soft); }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.card:hover .card-thumb img { transform: scale(1.02); }
.card-body { padding: 20px 22px 18px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 18px; font-weight: 600; color: var(--text); line-height: 1.4; margin-bottom: 8px; transition: color .2s; }
.card-body h3 a { color: var(--text); }
.card-body h3 a:hover { color: var(--brand); }
.card-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: auto;
}
.card-meta .time { display: flex; align-items: center; gap: 4px; }
.card-cat {
  background: var(--brand-soft);
  color: var(--brand);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.card-link { margin-left: auto; font-size: 13px; color: var(--brand); display: flex; align-items: center; gap: 2px; transition: transform .2s ease; }
.card:hover .card-link { transform: translateX(4px); }

/* ===== Feature Banner / 特色板块 ===== */
.feature-strip {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-item { display: flex; gap: 14px; padding: 8px 0; }
.feature-icon {
  width: 44px; height: 44px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.feature-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.feature-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ===== Hot Topic 热点专题 ===== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.topic-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-md);
  transition: box-shadow .3s ease, transform .3s ease;
}
.topic-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.topic-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.topic-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.topic-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.topic-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0 6px 18px;
  position: relative;
  border-bottom: 1px dashed var(--border);
}
.topic-list li:last-child { border-bottom: none; }
.topic-list li::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  position: absolute;
  left: 0; top: 13px;
}

/* ===== Flow / 获取资讯流程 ===== */
.flow-section { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: var(--shadow-md); padding: 40px; }
.flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 8px; }
.flow-step { text-align: center; padding: 16px 8px; position: relative; }
.flow-step::after {
  content: "→";
  position: absolute;
  right: -16px; top: 32px;
  color: #C0CCDA;
  font-size: 18px;
}
.flow-step:last-child::after { display: none; }
.step-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}
.flow-step h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.flow-step p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ===== Data Comparison / 赛事数据对比 ===== */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compare-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
.compare-header { padding: 18px 24px; background: var(--brand-soft); display: flex; align-items: center; gap: 12px; }
.compare-header h3 { font-size: 17px; font-weight: 600; color: var(--brand); }
.compare-header .sub { font-size: 13px; color: var(--text-secondary); margin-left: auto; }
.compare-body { padding: 20px 24px; }
.compare-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.compare-row:last-child { border-bottom: none; }
.compare-row .label { color: var(--text-secondary); }
.compare-row .value { font-weight: 600; color: var(--text); }
.stat-badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}

/* ===== FAQ ===== */
.faq-list { border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card-bg); overflow: hidden; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  text-align: left;
  transition: background .2s ease;
}
.faq-question:hover { background: var(--brand-soft); }
.faq-icon { font-size: 20px; color: var(--brand); transition: transform .3s ease; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 0 24px 18px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { padding: 60px 0; }
.cta-box {
  background: linear-gradient(135deg, var(--brand) 0%, #1F7CCE 100%);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0; bottom: 0;
  background: url('/assets/images/backpic/back-2.webp') no-repeat center / cover;
  opacity: .1;
}
.cta-box h2 { font-size: 28px; color: #fff; font-weight: 700; margin-bottom: 10px; position: relative; }
.cta-box p { color: rgba(255,255,255,.9); font-size: 15px; max-width: 560px; margin: 0 auto 28px; line-height: 1.7; position: relative; }
.btn-group { display: flex; gap: 14px; justify-content: center; position: relative; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease, border-color .2s ease, box-shadow .2s ease;
  text-decoration: none;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-hover); color: #fff; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--brand);
}
.btn-secondary:hover { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); }
.btn-secondary:active { transform: translateY(1px); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); }
.btn-white { background: #fff; color: var(--brand); }
.btn-white:hover { background: var(--brand-soft); color: var(--brand-hover); transform: translateY(-1px); }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; }

/* ===== Footer ===== */
.footer {
  background: #fff;
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 48% 26% 26%;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 32px;
}
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; max-width: 360px; margin-top: 8px; }
.footer h4 { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 14px; }
.footer-links li, .footer-contact li { font-size: 14px; color: var(--text-secondary); padding: 4px 0; }
.footer-links a { color: var(--text-secondary); font-size: 14px; }
.footer-links a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 0;
}
.footer-bottom p { font-size: 13px; color: var(--text-secondary); text-align: center; }

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 44px; height: 44px;
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, background .2s ease;
  z-index: 90;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--brand-hover); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-up { animation: fadeInUp .45s ease both; }
.delay-1 { animation-delay: .05s; }
.delay-2 { animation-delay: .12s; }
.delay-3 { animation-delay: .18s; }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .sidebar { display: none; }
  .topbar { display: flex; }
  .main-wrapper { margin-left: 0; }
  .page-header { padding-top: 88px; }
  .cards-grid, .topic-grid, .feature-strip { grid-template-columns: repeat(2, 1fr); }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .flow-step::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .section { padding: 48px 0; }
}
@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .page-header { padding: 80px 0 28px; }
  .page-header h1 { font-size: 28px; }
  .cards-grid, .topic-grid, .feature-strip, .compare-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .flow-step { text-align: left; display: flex; align-items: flex-start; gap: 14px; }
  .step-num { margin: 0; flex-shrink: 0; }
  .btn-group { flex-direction: column; align-items: stretch; }
  .btn-group .btn { justify-content: center; }
  .section { padding: 36px 0; }
  .cta-box { padding: 32px 24px; }
  .cta-box h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-brand { grid-column: 1; }
  .breadcrumb { font-size: 12px; flex-wrap: wrap; }
}

/* roulang page: article */
:root {
  --brand: #1B6BBF;
  --brand-hover: #155E9E;
  --brand-soft: #EAF2FB;
  --accent: #18A38B;
  --accent-soft: #E3F5F1;
  --bg: #F6F9FC;
  --card-bg: #FFFFFF;
  --text: #1F2A3D;
  --text-secondary: #5E6E85;
  --border: #E2EAF2;
  --success: #24965C;
  --warning: #D9830F;
  --error: #CC3A3A;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 14px;
  --shadow: 0 1px 2px rgba(16,42,67,.04), 0 8px 24px rgba(16,42,67,.06);
  --shadow-hover: 0 12px 32px rgba(16,42,67,.10);
  --font: 'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
  --sidebar-width: 220px;
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); 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: var(--brand); text-decoration: none; transition: color .2s ease; }
ul,ol { list-style: none; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; width: 100%; }

/* ===== 左侧导航 ===== */
.sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-width); background: #fff; border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 120; }
.sidebar-brand { height: 72px; display: flex; align-items: center; gap: 10px; padding: 0 20px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.logo-icon { width: 32px; height: 32px; border-radius: 8px; background: var(--brand); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 17px; font-weight: 700; }
.logo-text { font-size: 16px; font-weight: 600; color: var(--text); }
.logo-badge { font-size: 11px; background: var(--accent-soft); color: var(--accent); padding: 2px 8px; border-radius: 999px; font-weight: 600; white-space: nowrap; }
.sidebar-nav { flex: 1; padding: 12px; overflow-y: auto; }
.nav-group-title { font-size: 12px; color: var(--text-secondary); padding: 16px 12px 6px; font-weight: 500; }
.nav-item { display: flex; align-items: center; gap: 12px; height: 44px; padding: 0 16px; border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 15px; font-weight: 500; transition: background .2s ease,color .2s ease; }
.nav-item:hover { background: var(--brand-soft); color: var(--brand); }
.nav-item.active { background: var(--brand); color: #fff; }
.nav-item .nav-icon { width: 18px; height: 18px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.sidebar-footer { border-top: 1px solid var(--border); padding: 12px; flex-shrink: 0; }
.sidebar-footer .nav-group-title { padding-top: 4px; }
.sidebar-copyright { font-size: 12px; color: var(--text-secondary); text-align: center; padding: 14px 0 6px; }

/* ===== 移动端顶栏 ===== */
.mobile-header { display: none; position: sticky; top: 0; height: 56px; background: #fff; border-bottom: 1px solid var(--border); align-items: center; justify-content: space-between; padding: 0 16px; z-index: 90; }
.mobile-logo { display: flex; align-items: center; gap: 8px; }
.mobile-toggle { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 8px; color: var(--text); transition: background .2s ease; }
.mobile-toggle:hover { background: var(--brand-soft); color: var(--brand); }
.mobile-overlay { display: none; position: fixed; inset: 0; background: rgba(31,42,61,.4); z-index: 110; opacity: 0; visibility: hidden; transition: opacity .3s ease,visibility .3s ease; }
.mobile-overlay.show { opacity: 1; visibility: visible; }

/* ===== 主内容区 ===== */
.main { margin-left: var(--sidebar-width); min-height: 100vh; display: flex; flex-direction: column; }
.main-content { flex: 1; }
.article-wrap { max-width: 860px; margin: 0 auto; }
.breadcrumb { display: flex; align-items: center; gap: 8px; padding: 32px 0 4px; font-size: 13px; color: var(--text-secondary); flex-wrap: wrap; }
.breadcrumb a { color: var(--brand); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: #C0CCDA; }
.breadcrumb-back { display: none; font-weight: 500; }

/* ===== 文章头部 ===== */
.article-header { padding: 28px 0 24px; }
.article-title, .article-header h1 { font-size: 34px; line-height: 1.3; font-weight: 700; color: var(--text); margin: 0 0 16px; letter-spacing: -0.01em; }
.article-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--text-secondary); }
.badge { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--brand-soft); color: var(--brand); }
.meta-time::before, .meta-author::before { content: ''; display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: #C0CCDA; margin-right: 10px; vertical-align: middle; }

/* ===== 正文区 ===== */
.article-body { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 44px 48px; box-shadow: var(--shadow); color: var(--text); font-size: 16px; line-height: 1.8; }
.article-body > p:first-of-type::first-letter { font-size: 2.5em; font-weight: 700; color: var(--brand); float: left; line-height: 1; margin-right: 10px; padding-top: 5px; }
.article-body p { margin-bottom: 1.2em; text-align: justify; }
.article-body img { max-width: 100%; border-radius: var(--radius); margin: 24px auto; height: auto; }
.article-body .backpic { background: var(--brand-soft); padding: 8px; }
.article-body h2 { font-size: 24px; font-weight: 700; margin: 40px 0 16px; padding-top: 8px; line-height: 1.4; }
.article-body h3 { font-size: 19px; font-weight: 600; margin: 28px 0 12px; line-height: 1.4; }
.article-body blockquote { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 24px 0; color: var(--text-secondary); }
.article-body ul, .article-body ol { margin: 0 0 1.2em 1.4em; }
.article-body ul li { list-style: disc; margin-bottom: .5em; }
.article-body ol li { list-style: decimal; margin-bottom: .5em; }
.article-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--brand-hover); }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-body table th { background: var(--brand-soft); font-weight: 600; }

/* ===== 文章标签 ===== */
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 24px 0 8px; }
.tag { display: inline-flex; align-items: center; padding: 4px 14px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 13px; font-weight: 500; transition: background .2s ease; }
.tag:hover { background: var(--accent-soft); color: var(--accent); }

/* ===== 空态 ===== */
.not-found { background: #fff; border: 1px dashed var(--border); border-radius: var(--radius-lg); padding: 80px 40px; text-align: center; margin: 40px 0; }
.not-found-icon { font-size: 52px; margin-bottom: 16px; }
.not-found-title { font-size: 24px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.not-found p { color: var(--text-secondary); margin-bottom: 24px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 44px; padding: 0 24px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; border: 1px solid transparent; transition: background .2s ease, transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-hover); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(27,107,191,.25); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: #fff; border-color: var(--border); color: var(--brand); }
.btn-secondary:hover { border-color: var(--brand); background: var(--brand-soft); transform: translateY(-1px); }
.btn-secondary:active { transform: translateY(0); }
.btn-download { height: 52px; padding: 0 32px; font-size: 16px; }
.btn-download svg { width: 20px; height: 20px; }

/* ===== 相关推荐 ===== */
.related-section { padding: 40px 0 16px; }
.section-title { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 24px; line-height: 1.4; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: box-shadow .3s ease, transform .3s ease; }
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.related-thumb { display: block; overflow: hidden; aspect-ratio: 16/9; background: var(--brand-soft); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.related-card:hover .related-thumb img { transform: scale(1.02); }
.related-card-body { padding: 16px 20px 20px; }
.related-card h3 { font-size: 16px; font-weight: 600; line-height: 1.45; margin-bottom: 10px; }
.related-card h3 a { color: var(--text); display: block; }
.related-card h3 a:hover { color: var(--brand); }
.related-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-secondary); }
.read-link { color: var(--brand); font-size: 13px; font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: gap .2s ease; }
.read-link:hover { gap: 8px; }
.related-back { margin-top: 24px; font-size: 14px; }
.related-back a { color: var(--text-secondary); }
.related-back a:hover { color: var(--brand); }

/* ===== CTA 下载区 ===== */
.cta-section { padding: 48px 0 56px; }
.cta-inner { position: relative; background: #fff url('/assets/images/backpic/back-2.webp') center/cover no-repeat; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 48px 40px; text-align: center; overflow: hidden; box-shadow: var(--shadow); }
.cta-inner::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(255,255,255,.92), rgba(227,245,241,.88)); }
.cta-inner > * { position: relative; z-index: 1; }
.cta-inner h2 { font-size: 26px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.cta-inner > p { color: var(--text-secondary); margin-bottom: 28px; font-size: 15px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-version { margin-top: 20px !important; font-size: 13px; color: var(--text-secondary); margin-bottom: 0 !important; }

/* ===== 页脚 ===== */
.footer { background: #fff; border-top: 1px solid var(--border); padding: 40px 0 0; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 48% 26% 26%; gap: 32px; padding-bottom: 32px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); max-width: 340px; margin-top: 6px; }
.footer-links h4, .footer-contact h4 { font-size: 15px; font-weight: 600; margin-bottom: 12px; color: var(--text); }
.footer-links ul li, .footer-contact ul li { margin-bottom: 8px; font-size: 14px; color: var(--text-secondary); }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--brand); }
.footer-bottom { border-top: 1px solid var(--border); padding: 16px 0; text-align: center; font-size: 13px; color: var(--text-secondary); }

/* ===== 响应式 ===== */
@media (max-width: 1023.98px) {
  .sidebar { width: 100%; transform: translateX(-100%); transition: transform .3s ease; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-nav { padding: 20px 32px; }
  .nav-group-title { font-size: 14px; padding: 18px 16px 10px; }
  .nav-item { height: 56px; font-size: 22px; padding: 0 20px; }
  .nav-item .nav-icon { width: 24px; height: 24px; }
  .main { margin-left: 0; }
  .mobile-header { display: flex; }
  .mobile-overlay { display: block; }
  .container { padding: 0 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767.98px) {
  .article-header h1 { font-size: 27px; }
  .article-body { padding: 24px 20px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .cta-buttons { flex-direction: column; }
  .btn-download { width: 100%; }
  .breadcrumb-others { display: none; }
  .breadcrumb-back { display: inline-block; }
  .cta-inner { padding: 36px 20px; }
  .article-meta { gap: 10px; font-size: 13px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-body { padding: 20px 16px; }
  .section-title { font-size: 21px; }
  .cta-inner h2 { font-size: 22px; }
  .related-card h3 { font-size: 15px; }
}

/* roulang page: category2 */
:root {
  --brand: #1B6BBF;
  --brand-hover: #155E9E;
  --brand-soft: #EAF2FB;
  --accent: #18A38B;
  --accent-soft: #E3F5F1;
  --bg: #F6F9FC;
  --card-bg: #FFFFFF;
  --text: #1F2A3D;
  --text-secondary: #5E6E85;
  --border: #E2EAF2;
  --success: #24965C;
  --warning: #D9830F;
  --error: #CC3A3A;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16,42,67,.04), 0 8px 24px rgba(16,42,67,.06);
  --shadow-hover: 0 12px 32px rgba(16,42,67,.10);
  --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 15px; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

.layout { display: flex; min-height: 100vh; }

/* 侧栏 */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: #fff;
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 0 16px;
}
.sidebar-brand {
  height: 72px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
}
.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-text { font-size: 16px; font-weight: 600; color: var(--text); }
.logo-badge {
  font-size: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.nav-group-title {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 16px 12px 6px;
  letter-spacing: .5px;
}
.sidebar-nav { flex: 1; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background-color .2s ease, color .2s ease, transform .2s ease;
}
.nav-item:hover { background: var(--brand-soft); color: var(--brand); }
.nav-item.active { background: var(--brand); color: #fff; }
.nav-item .nav-icon { display: inline-flex; align-items: center; justify-content: center; width: 18px; }
.sidebar-bottom { padding: 16px 8px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-secondary); }

/* 主内容 */
.main { margin-left: 220px; flex: 1; min-width: 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* 移动端头部 */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  z-index: 200;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.mobile-brand { display: flex; align-items: center; gap: 8px; }
.mobile-menu-btn {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: background-color .2s ease;
}
.mobile-menu-btn:hover { background: var(--brand-soft); }
.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 300;
  flex-direction: column;
  padding: 20px 24px;
  transform: translateX(100%);
  transition: transform .3s ease;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-header { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.drawer-brand { display: flex; align-items: center; gap: 8px; }
.drawer-close { width: 40px; height: 40px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; color: var(--text); }
.drawer-close:hover { background: var(--brand-soft); }
.drawer-nav { flex: 1; display: flex; flex-direction: column; gap: 8px; padding-top: 24px; }
.drawer-nav a {
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  padding: 12px 8px;
  border-radius: 8px;
  transition: background-color .2s ease, color .2s ease;
}
.drawer-nav a:hover { background: var(--brand-soft); color: var(--brand); }
.drawer-nav a.active { color: var(--brand); }
.drawer-footer { padding-top: 16px; }
.btn-block { width: 100%; }

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color .2s ease, border-color .2s ease, transform .2s ease, color .2s ease;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-hover); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary { background: #fff; border-color: var(--border); color: var(--brand); }
.btn-secondary:hover { border-color: var(--brand); background: var(--brand-soft); }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; }

/* 页头 */
.page-header {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; }
.breadcrumb a { color: var(--brand); }
.breadcrumb .sep { opacity: .6; }
.breadcrumb .current { color: var(--text-secondary); }
.page-header h1 { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 8px; }
.page-desc { font-size: 15px; color: var(--text-secondary); max-width: 680px; }

/* 通用 section */
.section { padding: 80px 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-head { margin-bottom: 40px; }
.section-head h2 { font-size: 26px; font-weight: 700; line-height: 1.3; margin-bottom: 8px; }
.section-head p { font-size: 15px; color: var(--text-secondary); max-width: 560px; }

/* 网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* 卡片通用 */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  transition: box-shadow .3s ease, transform .3s ease;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

/* 核心能力 */
.feature-card { text-align: left; }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* 数据维度面板 */
.dimensions-panel {
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  padding: 56px;
}
.dimensions-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(16,42,67,.92), rgba(27,107,191,.82));
}
.dimensions-content { position: relative; z-index: 1; color: #fff; }
.dimensions-content h2 { font-size: 26px; font-weight: 700; margin-bottom: 8px; }
.dimensions-content > p { font-size: 15px; opacity: .85; max-width: 520px; margin-bottom: 32px; }
.dimension-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.dimension-item {
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: background-color .2s ease, transform .2s ease;
}
.dimension-item:hover { background: rgba(255,255,255,.16); transform: translateY(-2px); }
.dimension-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,.16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.dimension-item strong { display: block; font-size: 16px; font-weight: 600; margin-bottom: 2px; }
.dimension-item span { font-size: 13px; opacity: .8; line-height: 1.5; }

/* 流程 */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  position: relative;
  transition: box-shadow .3s ease, transform .3s ease;
}
.step:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.step-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
  line-height: 1;
}
.step h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* 场景 */
.scenario-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.scenario-card .img-wrap { width: 100%; aspect-ratio: 16/9; overflow: hidden; }
.scenario-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.scenario-card:hover img { transform: scale(1.02); }
.scenario-body { padding: 24px; }
.scenario-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.scenario-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* FAQ */
.faq-list { max-width: 860px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow .2s ease;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  width: 100%;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-question::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform .3s ease;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* 系统要求 */
.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.req-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 32px;
  transition: box-shadow .3s ease;
}
.req-card:hover { box-shadow: var(--shadow); }
.req-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.req-card ul li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid #F0F4F8;
  font-size: 14px;
}
.req-card ul li:last-child { border-bottom: none; }
.req-card ul li span { color: var(--text-secondary); }
.req-card ul li strong { font-weight: 600; text-align: right; }

/* CTA */
.cta-section { padding: 64px 0 80px; }
.cta-box {
  background: var(--brand);
  border-radius: 16px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
}
.cta-box .badge-line {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.14);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 13px;
  margin-bottom: 16px;
}
.cta-box h2 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.cta-box p { font-size: 15px; opacity: .85; margin-bottom: 28px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-box .btn-primary { background: #fff; color: var(--brand); }
.cta-box .btn-primary:hover { background: var(--brand-soft); }
.cta-box .btn-secondary { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.cta-box .btn-secondary:hover { background: rgba(255,255,255,.1); border-color: #fff; }

/* 页脚 */
.footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 48px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 48% 26% 26%;
  gap: 24px;
  padding-bottom: 32px;
}
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; max-width: 420px; margin-top: 8px; }
.footer-links h4, .footer-contact h4 { font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.footer-links ul li, .footer-contact ul li { font-size: 13px; color: var(--text-secondary); padding: 4px 0; }
.footer-links ul li a { transition: color .2s ease; }
.footer-links ul li a:hover { color: var(--brand); }
.footer-bottom { border-top: 1px solid var(--border); padding: 16px 0; }
.footer-bottom p { font-size: 13px; color: var(--text-secondary); }

/* 响应式 */
@media (max-width: 1023px) {
  .sidebar { display: none; }
  .mobile-header { display: flex; }
  .mobile-drawer { display: flex; }
  .main { margin-left: 0; padding-top: 56px; }
  .section { padding: 48px 0; }
  .page-header { padding: 32px 0 20px; }
  .dimensions-panel { padding: 40px 32px; }
  .cta-section { padding: 40px 0 48px; }
  .cta-box { padding: 48px 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .dimension-list { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 26px; }
  .section-head h2 { font-size: 22px; }
  .cta-box h2 { font-size: 22px; }
  .step { padding: 24px; }
}

/* roulang page: category3 */
:root {
      --brand: #1B6BBF;
      --brand-hover: #155E9E;
      --brand-soft: #EAF2FB;
      --accent: #18A38B;
      --accent-hover: #148A76;
      --accent-soft: #E3F5F1;
      --bg: #F6F9FC;
      --card-bg: #FFFFFF;
      --text: #1F2A3D;
      --text-secondary: #5E6E85;
      --border: #E2EAF2;
      --success: #24965C;
      --warning: #D9830F;
      --error: #CC3A3A;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 999px;
      --shadow-card: 0 1px 2px rgba(16,42,67,.04), 0 8px 24px rgba(16,42,67,.06);
      --shadow-hover: 0 12px 32px rgba(16,42,67,.10);
      --container-max: 1280px;
      --sidebar-width: 220px;
      --section-space: 80px;
      --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    }
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-family);
      font-size: 15px;
      line-height: 1.7;
      background: var(--bg);
      color: var(--text);
      display: flex;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      color: var(--brand);
      text-decoration: none;
      transition: color .2s ease;
    }
    a:hover {
      color: var(--brand-hover);
    }
    button {
      font-family: var(--font-family);
      cursor: pointer;
      border: none;
      background: none;
    }
    ul,
    ol {
      list-style: none;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: var(--section-space) 0;
    }
    .section-divider {
      border-top: 1px solid var(--border);
      margin: 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-header h2 {
      font-size: 28px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      margin-bottom: 12px;
    }
    .section-header p {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 640px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .section-subtitle {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: var(--radius-tag);
      margin-bottom: 14px;
    }
    .section-subtitle::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
    }

    /* ===== 左侧导航（桌面端） ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: var(--sidebar-width);
      background: var(--card-bg);
      border-right: 1px solid var(--border);
      z-index: 1000;
      display: flex;
      flex-direction: column;
      transition: transform .3s ease;
    }
    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 16px;
      height: 72px;
      border-bottom: 1px solid var(--border);
      flex-shrink: 0;
    }
    .logo-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: var(--brand);
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .logo-text {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.2;
    }
    .logo-badge {
      font-size: 11px;
      font-weight: 600;
      background: var(--accent-soft);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: var(--radius-tag);
      line-height: 1.6;
    }
    .sidebar-nav {
      flex: 1;
      padding: 20px 12px;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .nav-group-title {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-secondary);
      text-transform: none;
      letter-spacing: .02em;
      padding: 14px 12px 6px;
    }
    .nav-item {
      display: flex;
      align-items: center;
      gap: 10px;
      height: 44px;
      padding: 0 12px;
      border-radius: var(--radius-btn);
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: background .2s ease, color .2s ease;
      position: relative;
    }
    .nav-item .nav-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 18px;
      height: 18px;
      color: currentColor;
    }
    .nav-item:hover {
      background: var(--brand-soft);
      color: var(--brand);
    }
    .nav-item.active {
      background: var(--brand);
      color: #fff;
    }
    .nav-item.active::before {
      content: "";
      position: absolute;
      left: 2px;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 20px;
      border-radius: 2px;
      background: var(--accent);
    }
    .sidebar-bottom {
      border-top: 1px solid var(--border);
      padding: 16px;
      background: var(--brand-soft);
      border-radius: 0 0 0 0;
      flex-shrink: 0;
    }
    .sidebar-bottom p {
      font-size: 12px;
      color: var(--text-secondary);
      margin-bottom: 4px;
      line-height: 1.6;
    }

    /* ===== 主内容区域 ===== */
    .main-wrap {
      flex: 1;
      margin-left: var(--sidebar-width);
      min-width: 0;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }
    .content {
      flex: 1;
    }

    /* ===== 移动端顶部导航 ===== */
    .topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 999;
      height: 56px;
      background: var(--card-bg);
      border-bottom: 1px solid var(--border);
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
    }
    .menu-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      color: var(--text);
    }
    .menu-btn:hover {
      background: var(--brand-soft);
    }
    .topbar-logo {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .topbar-cta {
      font-size: 13px;
      font-weight: 600;
      background: var(--brand);
      color: #fff;
      padding: 6px 14px;
      border-radius: var(--radius-btn);
    }
    .topbar-cta:hover {
      background: var(--brand-hover);
      color: #fff;
    }
    .drawer-cta {
      display: none;
      margin-top: auto;
      padding: 16px;
      border-top: 1px solid var(--border);
    }
    .drawer-cta a {
      display: block;
      text-align: center;
      height: 48px;
      line-height: 48px;
      background: var(--brand);
      color: #fff;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
    }
    .overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(31, 42, 61, .45);
      z-index: 999;
    }

    /* ===== 平台指南页首屏 ===== */
    .page-hero {
      padding: 48px 0 40px;
      background: linear-gradient(180deg, var(--brand-soft) 0%, var(--bg) 100%);
      border-bottom: 1px solid var(--border);
    }
    .page-hero .breadcrumb {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
    }
    .page-hero .breadcrumb a {
      color: var(--brand);
    }
    .page-hero .breadcrumb .sep {
      color: var(--border);
    }
    .page-hero-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: var(--radius-tag);
      margin-bottom: 16px;
    }
    .page-hero-label::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
    }
    .page-hero h1 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      margin-bottom: 12px;
    }
    .page-hero .lead {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 720px;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .hero-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 24px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      transition: background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    .btn:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    .btn-primary {
      background: var(--brand);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--brand-hover);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(27, 107, 191, .20);
    }
    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: none;
    }
    .btn-secondary {
      background: var(--card-bg);
      color: var(--brand);
      border: 1px solid var(--border);
    }
    .btn-secondary:hover {
      background: var(--brand-soft);
      border-color: var(--brand);
      color: var(--brand);
      transform: translateY(-1px);
    }
    .btn-secondary:active {
      transform: translateY(1px);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(24, 163, 139, .25);
    }
    .btn-lg {
      height: 52px;
      padding: 0 32px;
      font-size: 16px;
    }

    /* ===== 平台版本卡片 ===== */
    .version-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 20px;
    }
    .version-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: box-shadow .3s ease, transform .3s ease;
    }
    .version-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .version-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--brand-soft);
      color: var(--brand);
      margin-bottom: 16px;
    }
    .version-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
    }
    .version-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .version-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 14px;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 4px 10px;
      border-radius: var(--radius-tag);
    }

    /* ===== 上手流程 ===== */
    .steps-section {
      padding: 80px 0;
    }
    .steps-section .section-header {
      margin-bottom: 48px;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      counter-reset: step;
    }
    .step-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      position: relative;
      box-shadow: var(--shadow-card);
      transition: box-shadow .3s ease;
    }
    .step-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .step-card::before {
      counter-increment: step;
      content: "0" counter(step);
      font-size: 40px;
      font-weight: 700;
      color: var(--brand-soft);
      line-height: 1;
      display: block;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
    }
    .step-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .step-arrow {
      position: absolute;
      top: 40px;
      right: -18px;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      z-index: 2;
      box-shadow: 0 4px 12px rgba(24, 163, 139, .25);
    }

    /* ===== 适用场景 ===== */
    .scenario-section {
      background: var(--brand-soft);
      padding: 80px 0;
    }
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-card);
      transition: box-shadow .3s ease, transform .3s ease;
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .scenario-card .number {
      font-size: 24px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 12px;
    }
    .scenario-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
    }
    .scenario-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .scenario-list {
      margin-top: 16px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .scenario-list li {
      font-size: 13px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .scenario-list li::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      flex-shrink: 0;
    }

    /* ===== 功能模块速览 ===== */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: box-shadow .3s ease, transform .3s ease;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .feature-card .thumb {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      position: relative;
      background: var(--brand-soft);
    }
    .feature-card .thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .3s ease;
    }
    .feature-card:hover .thumb img {
      transform: scale(1.02);
    }
    .feature-card .body {
      padding: 20px 20px 22px;
    }
    .feature-card .body h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text);
    }
    .feature-card .body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .feature-meta {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 14px;
      font-size: 13px;
      color: var(--brand);
    }
    .feature-meta .arrow {
      transition: transform .3s ease;
    }
    .feature-card:hover .feature-meta .arrow {
      transform: translateX(4px);
    }

    /* ===== 配置要求 ===== */
    .requirements-section {
      background: var(--card-bg);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .requirements-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }
    .req-card {
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px;
      background: var(--bg);
    }
    .req-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 20px;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .req-card h3 .badge-req {
      font-size: 12px;
      font-weight: 600;
      padding: 2px 10px;
      border-radius: var(--radius-tag);
      background: var(--brand-soft);
      color: var(--brand);
    }
    .req-card:last-child h3 .badge-req {
      background: var(--accent-soft);
      color: var(--accent);
    }
    .req-table {
      display: flex;
      flex-direction: column;
    }
    .req-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 0;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }
    .req-row:last-child {
      border-bottom: none;
    }
    .req-row .label {
      color: var(--text-secondary);
    }
    .req-row .value {
      color: var(--text);
      font-weight: 500;
      text-align: right;
    }
    .req-note {
      margin-top: 24px;
      font-size: 13px;
      color: var(--text-secondary);
      background: var(--brand-soft);
      border-radius: 8px;
      padding: 12px 16px;
      line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 80px 0;
    }
    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      background: var(--card-bg);
    }
    .faq-item {
      border-bottom: 1px solid var(--border);
    }
    .faq-item:last-child {
      border-bottom: none;
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 500;
      color: var(--text);
      text-align: left;
      transition: background .2s ease;
    }
    .faq-question:hover {
      background: var(--brand-soft);
    }
    .faq-icon {
      width: 20px;
      height: 20px;
      position: relative;
      flex-shrink: 0;
    }
    .faq-icon::before,
    .faq-icon::after {
      content: "";
      position: absolute;
      background: var(--brand);
      border-radius: 2px;
      transition: transform .3s ease, opacity .3s ease;
    }
    .faq-icon::before {
      width: 14px;
      height: 2px;
      top: 9px;
      left: 3px;
    }
    .faq-icon::after {
      width: 2px;
      height: 14px;
      top: 3px;
      left: 9px;
    }
    .faq-item.open .faq-icon::after {
      transform: rotate(90deg);
      opacity: 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .3s ease, padding .3s ease;
      padding: 0 24px;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }
    .faq-answer p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      padding-top: 4px;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: linear-gradient(180deg, var(--bg) 0%, var(--brand-soft) 100%);
      padding: 80px 0;
      border-top: 1px solid var(--border);
    }
    .cta-box {
      background: var(--brand);
      border-radius: 20px;
      padding: 64px 48px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, .12) 0%, transparent 50%);
      pointer-events: none;
    }
    .cta-box h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
      position: relative;
    }
    .cta-box p {
      font-size: 15px;
      color: rgba(255, 255, 255, .85);
      margin-bottom: 28px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.7;
      position: relative;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
      position: relative;
    }
    .btn-white {
      background: #fff;
      color: var(--brand);
    }
    .btn-white:hover {
      background: var(--brand-soft);
      color: var(--brand-hover);
      transform: translateY(-1px);
    }
    .btn-outline-white {
      background: transparent;
      color: #fff;
      border: 1px solid rgba(255, 255, 255, .6);
    }
    .btn-outline-white:hover {
      background: rgba(255, 255, 255, .1);
      color: #fff;
      border-color: #fff;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: var(--card-bg);
      border-top: 1px solid var(--border);
      padding-top: 48px;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 48% 26% 26%;
      gap: 24px;
      padding-bottom: 36px;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-top: 8px;
    }
    .footer h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 14px;
    }
    .footer-links ul,
    .footer-contact ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-secondary);
      transition: color .2s ease;
    }
    .footer-links a:hover {
      color: var(--brand);
    }
    .footer-contact li {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 16px 0;
      text-align: center;
    }
    .footer-bottom p {
      font-size: 13px;
      color: var(--text-secondary);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1023px) {
      .sidebar {
        transform: translateX(-100%);
        box-shadow: 4px 0 24px rgba(16, 42, 67, .12);
      }
      .sidebar.open {
        transform: translateX(0);
      }
      .overlay.show {
        display: block;
      }
      .main-wrap {
        margin-left: 0;
      }
      .topbar {
        display: flex;
      }
      .drawer-cta {
        display: block;
      }
      .content {
        padding-top: 0;
      }
      .section {
        padding: 48px 0;
      }
      .version-grid,
      .steps-grid,
      .scenario-grid,
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-arrow {
        display: none;
      }
    }
    @media (max-width: 767px) {
      .container {
        padding: 0 16px;
      }
      .section-header {
        margin-bottom: 32px;
      }
      .section-header h2 {
        font-size: 24px;
      }
      .version-grid,
      .steps-grid,
      .scenario-grid,
      .feature-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .requirements-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .page-hero {
        padding: 32px 0 28px;
      }
      .page-hero h1 {
        font-size: 26px;
      }
      .page-hero .lead {
        font-size: 15px;
      }
      .breadcrumb {
        display: none;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .cta-box {
        padding: 40px 20px;
        border-radius: 16px;
      }
      .cta-box h2 {
        font-size: 22px;
      }
      .cta-actions {
        flex-direction: column;
      }
      .cta-actions .btn {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .faq-question {
        font-size: 15px;
        padding: 16px 18px;
      }
      .faq-answer {
        padding: 0 18px;
      }
      .faq-item.open .faq-answer {
        padding: 0 18px 16px;
      }
      .step-card {
        padding: 24px 20px;
      }
      .feature-card .body {
        padding: 16px 16px 18px;
      }
      .req-card {
        padding: 20px;
      }
    }
    @media (max-width: 520px) {
      .topbar-cta {
        font-size: 12px;
        padding: 5px 10px;
      }
      .btn-lg {
        height: 48px;
        font-size: 15px;
      }
    }