/* roulang page: index */
:root {
  --primary: #1E3A5F;
  --dark: #14253C;
  --accent: #C96432;
  --accent-hover: #A84B20;
  --bg: #FAFAF7;
  --card-bg: #FFFFFF;
  --border: #E6E4DE;
  --title-color: #1F2A3D;
  --text-color: #334155;
  --muted: #7C8698;
  --success: #2E9B6B;
  --disabled: #B9C0CC;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(20,37,60,0.05), 0 4px 12px rgba(20,37,60,0.06);
  --shadow-hover: 0 4px 12px rgba(20,37,60,0.10), 0 12px 24px rgba(20,37,60,0.10);
  --container: 1200px;
  --space-section: 120px;
  --space-section-mobile: 72px;
  --font-cn: "PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-num: "DIN Alternate","Bahnschrift",Arial,sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--text-color);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s ease;
}

a:hover,
a:focus {
  color: var(--accent);
}

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

ul,
ol {
  list-style: none;
}

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

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.95);
  border-bottom: 1px solid var(--border);
  height: 64px;
  backdrop-filter: blur(8px);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

.logo-badge {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: rgba(30, 58, 95, 0.08);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

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

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-color);
  position: relative;
  padding: 22px 0;
  line-height: 1;
}

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

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

.nav-link.active::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 6px;
  vertical-align: middle;
}

.nav-cta {
  margin-left: 32px;
  height: 40px;
  padding: 0 24px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all .2s ease;
}

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

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

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  height: 48px;
  padding: 0 32px;
  transition: all .2s ease;
  line-height: 1.2;
  white-space: nowrap;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 0 28px;
}

.btn-outline:hover,
.btn-outline:focus {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-light:hover,
.btn-light:focus {
  background: #f5f5f2;
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-sm {
  height: 40px;
  padding: 0 22px;
  font-size: 14px;
}

.btn-lg {
  height: 54px;
  padding: 0 40px;
  font-size: 16px;
}

.btn .btn-sub {
  display: block;
  font-size: 12px;
  font-weight: 400;
  opacity: .85;
  margin-left: 6px;
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 64px;
  background: var(--bg);
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
  padding-top: 72px;
  padding-bottom: 72px;
  min-height: 620px;
}

.hero-content {
  flex: 0 0 55%;
  max-width: 55%;
}

.hero-badge {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
}

.badge-ver,
.badge-safe {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  letter-spacing: .3px;
}

.badge-ver {
  background: rgba(30, 58, 95, 0.08);
  color: var(--primary);
}

.badge-safe {
  background: rgba(46, 155, 107, 0.12);
  color: var(--success);
}

.badge-safe::before {
  content: "✓";
  margin-right: 4px;
  font-weight: 700;
}

.hero h1 {
  font-size: 52px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--title-color);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-sub {
  font-size: 18px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-meta {
  font-size: 14px;
  color: var(--muted);
  font-family: var(--font-num);
  letter-spacing: .3px;
}

.hero-visual {
  flex: 0 0 45%;
  max-width: 45%;
  position: relative;
}

.hero-visual-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.hero-visual-main img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.hero-float-card {
  position: absolute;
  bottom: 24px;
  left: -20px;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
}

.float-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  position: relative;
}

.float-dot::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(46, 155, 107, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(0.8); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.6; }
}

/* ---------- Trust Bar ---------- */
.trust-bar {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}

.trust-grid {
  display: flex;
  justify-content: space-between;
  gap: 0;
}

.trust-item {
  flex: 1;
  text-align: center;
  border-left: 1px solid var(--border);
  padding: 0 24px;
}

.trust-item:first-child {
  border-left: none;
}

.trust-num {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.trust-label {
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
}

.trust-note {
  font-size: 12px;
  color: var(--disabled);
  margin-top: 2px;
}

/* ---------- Section Shared ---------- */
.section {
  padding: var(--space-section) 0;
}

.section-header {
  margin-bottom: 48px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--title-color);
  line-height: 1.3;
  margin-bottom: 8px;
}

.section-header p {
  color: var(--muted);
  font-size: 16px;
  max-width: 480px;
}

.section-header.light h2,
.section-header.light p {
  color: #fff;
}

/* ---------- Features Carousel ---------- */
.features-section {
  background: #F1F1EC;
  padding: var(--space-section) 0;
  overflow: hidden;
}

.carousel-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.carousel-arrow {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  transition: all .2s ease;
}

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

.carousel-indicator {
  font-size: 14px;
  color: var(--muted);
  font-family: var(--font-num);
}

.carousel-viewport {
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform .4s cubic-bezier(.4, 0, .2, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 0 4px;
}

.carousel-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.carousel-card img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.carousel-info {
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.carousel-info h3 {
  font-size: 20px;
  color: var(--title-color);
  font-weight: 600;
  white-space: nowrap;
}

.carousel-info p {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
  text-align: right;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--disabled);
  transition: all .3s ease;
  cursor: pointer;
}

.dot.active {
  width: 24px;
  border-radius: var(--radius-pill);
  background: var(--primary);
}

/* ---------- System Requirements ---------- */
.system-section {
  background: var(--dark);
  padding: var(--space-section) 0;
}

.platform-grid {
  display: flex;
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.platform-col {
  flex: 1;
  padding: 40px 32px;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.platform-col:first-child {
  border-left: none;
}

.platform-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.platform-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.platform-ver {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-num);
}

.req-list li {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.req-list li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

/* ---------- Reviews ---------- */
.reviews-section {
  background: var(--bg);
  padding: var(--space-section) 0;
}

.bento-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 24px;
}

.review-card {
  background: #F1F1EC;
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow .2s ease, transform .2s ease;
}

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

.review-large {
  grid-row: span 2;
  background: var(--dark);
  color: #fff;
  justify-content: center;
  padding: 40px;
}

.review-large .stars {
  color: var(--accent);
  font-size: 22px;
  letter-spacing: 4px;
}

.review-large p {
  font-size: 20px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}

.review-wide {
  grid-column: span 2;
  flex-direction: row;
  align-items: center;
  gap: 20px;
}

.review-wide p {
  flex: 1;
  font-size: 15px;
  color: var(--text-color);
  margin: 0;
}

.review-wide .stars {
  color: var(--accent);
  letter-spacing: 3px;
  font-size: 16px;
}

.stars {
  color: var(--accent);
  letter-spacing: 3px;
  font-size: 16px;
}

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

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.review-user span {
  font-size: 15px;
  font-weight: 600;
  color: var(--title-color);
  display: block;
}

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

.review-large .review-user span {
  color: #fff;
}

.review-large .review-user small {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- News / CMS ---------- */
.news-section {
  background: var(--card-bg);
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.news-feature {
  display: block;
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow .2s ease, transform .2s ease;
}

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

.news-feature img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.news-feature-body {
  padding: 24px 28px 28px;
}

.news-feature-body .news-cat {
  display: inline-block;
  background: rgba(30, 58, 95, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  margin-bottom: 12px;
}

.news-feature-body h3 {
  font-size: 22px;
  color: var(--title-color);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
}

.news-feature-body p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 14px;
}

.news-feature-body .news-meta {
  font-size: 13px;
  color: var(--disabled);
  font-family: var(--font-num);
}

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

.news-item {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: all .2s ease;
}

.news-item:first-child {
  padding-top: 0;
}

.news-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.news-item:hover h4 {
  color: var(--primary);
}

.news-item h4 {
  font-size: 17px;
  color: var(--title-color);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
  transition: color .2s ease;
}

.news-item p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  font-size: 13px;
  color: var(--disabled);
  font-family: var(--font-num);
}

.news-empty {
  grid-column: span 2;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

.news-empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.news-empty p {
  color: var(--muted);
  font-size: 16px;
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--bg);
  padding: var(--space-section) 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--title-color);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: color .2s ease;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  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 .3s ease, padding .3s ease;
}

.faq-answer-inner {
  padding-bottom: 24px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- CTA Download ---------- */
.cta-section {
  background: var(--dark);
  padding: 96px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12;
}

.cta-inner {
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-size: 36px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-inner > p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 36px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.cta-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.qr-box {
  width: 120px;
  height: 120px;
  background: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--muted);
  border: 1px solid var(--border);
}

.cta-qr p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

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

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

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

.footer-brand p {
  font-size: 15px;
  color: var(--muted);
  max-width: 320px;
}

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

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

.footer-links a {
  font-size: 15px;
  color: var(--muted);
}

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

.footer-copy {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Mobile Menu ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-hover);
  z-index: 99;
  padding: 16px 24px;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-link {
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-color);
  border-bottom: 1px solid var(--border);
}

.mobile-link:last-child {
  border-bottom: none;
}

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

.mobile-link.active::before {
  content: "•";
  margin-right: 6px;
  color: var(--accent);
}

.mobile-btn {
  margin-top: 8px;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    flex-direction: column;
    gap: 40px;
    padding-top: 48px;
    text-align: center;
  }

  .hero-content {
    flex: none;
    max-width: 100%;
  }

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

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

  .hero-visual {
    flex: none;
    max-width: 100%;
    width: 100%;
  }

  .hero-visual-main img {
    height: 320px;
  }

  .hero-float-card {
    left: 12px;
  }

  .platform-grid {
    flex-direction: column;
    border-top: none;
  }

  .platform-col {
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 32px 0;
  }

  .platform-col:first-child {
    border-top: none;
  }

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

  .review-large {
    grid-row: span 1;
  }

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

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

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .section {
    padding: var(--space-section-mobile) 0;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

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

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

  .hero-sub {
    font-size: 16px;
  }

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

  .hero-meta {
    font-size: 13px;
  }

  .trust-grid {
    flex-wrap: wrap;
  }

  .trust-item {
    flex: 0 0 50%;
    border-left: none;
    border-bottom: 1px solid var(--border);
    padding: 20px 12px;
  }

  .trust-item:nth-child(odd) {
    border-right: 1px solid var(--border);
  }

  .trust-item:nth-child(-n+2) {
    border-top: none;
  }

  .trust-num {
    font-size: 28px;
  }

  .carousel-card img {
    height: 220px;
  }

  .carousel-info {
    flex-direction: column;
    gap: 8px;
    padding: 20px;
  }

  .carousel-info p {
    text-align: left;
  }

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

  .review-wide {
    grid-column: span 1;
    flex-direction: column;
    align-items: flex-start;
  }

  .review-large {
    padding: 28px;
  }

  .review-large p {
    font-size: 17px;
  }

  .news-feature img {
    height: 200px;
  }

  .cta-section {
    padding: 72px 0;
  }

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

  .cta-buttons .btn {
    width: 100%;
    max-width: 360px;
  }

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

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

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

  .hero-inner {
    padding-top: 32px;
    padding-bottom: 48px;
  }

  .hero-visual-main img {
    height: 240px;
  }

  .hero-float-card {
    display: none;
  }

  .carousel-controls {
    display: none;
  }

  .platform-col {
    padding: 24px 0;
  }

  .news-feature-body {
    padding: 18px 20px 20px;
  }

  .news-feature-body h3 {
    font-size: 18px;
  }

  .btn {
    padding: 0 24px;
  }

  .logo-badge {
    display: none;
  }
}

/* roulang page: category1 */
:root {
  --primary: #1E3A5F;
  --primary-dark: #14253C;
  --accent: #C96432;
  --accent-hover: #A84B20;
  --bg: #FAFAF7;
  --card-bg: #FFFFFF;
  --border: #E6E4DE;
  --text-title: #1F2A3D;
  --text-body: #334155;
  --text-muted: #7C8698;
  --success: #2E9B6B;
  --disabled: #B9C0CC;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(20,37,60,0.05), 0 4px 12px rgba(20,37,60,0.06);
  --shadow-hover: 0 4px 12px rgba(20,37,60,0.10), 0 12px 24px rgba(20,37,60,0.10);
  --container: 1200px;
  --spacer: 120px;
  --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background-color: var(--bg);
  color: var(--text-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

.section {
  padding: var(--spacer) 0;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent);
  background: rgba(201, 100, 50, 0.08);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 16px;
}

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

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.25;
}

.section-head p {
  margin-top: 12px;
  max-width: 560px;
  color: var(--text-muted);
  font-size: 15px;
}

.section-head.light h2 {
  color: #FFFFFF;
}

.section-head.light p {
  color: rgba(255,255,255,0.7);
}

.section-head.light .section-tag {
  background: rgba(255,255,255,0.10);
  color: #F5C9A8;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-cn);
  line-height: 1;
  white-space: nowrap;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

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

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

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

.btn-sm {
  height: 40px;
  padding: 0 24px;
  font-size: 15px;
}

.btn-lg {
  height: 54px;
  padding: 0 40px;
  font-size: 17px;
}

/* 标签 */
.tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(30, 58, 95, 0.08);
  border-radius: 999px;
  padding: 4px 14px;
  line-height: 1.6;
}

.tag-accent {
  background: rgba(201, 100, 50, 0.12);
  color: var(--accent);
}

.tag-success {
  background: rgba(46, 155, 107, 0.12);
  color: var(--success);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(250, 250, 247, 0.95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 40px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

.logo-badge {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(201, 100, 50, 0.10);
  border-radius: 999px;
  padding: 3px 12px;
  line-height: 1.5;
}

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

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  padding: 8px 16px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(30, 58, 95, 0.05);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.header-download {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 横幅 */
.page-banner {
  margin-top: 64px;
  background: #F2F1EC;
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}

.banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.banner-inner h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  max-width: 680px;
}

.banner-inner .banner-sub {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 20px;
  box-shadow: var(--shadow-sm);
}

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

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

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

/* 分类介绍 */
.intro-section {
  padding: var(--spacer) 0 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.intro-text {
  max-width: 600px;
}

.intro-text h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 20px;
}

.intro-text p {
  font-size: 16px;
  color: var(--text-body);
  margin-bottom: 16px;
}

.intro-text .feature-list {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

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

.intro-text .feature-list li::before {
  content: "";
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  background: var(--success);
  border-radius: 50%;
  position: relative;
}

.intro-text .feature-list li::after {
  content: "✓";
  position: absolute;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.intro-text .feature-list li {
  position: relative;
  padding-left: 30px;
}

.intro-text .feature-list li::before {
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--success);
  border-radius: 50%;
}

.intro-text .feature-list li::after {
  position: absolute;
  left: 4px;
  top: 7px;
  font-size: 11px;
}

.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.intro-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* 步骤区 */
.steps-section {
  padding: var(--spacer) 0;
}

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

.step-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

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

.step-num {
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  color: rgba(30, 58, 95, 0.15);
  line-height: 1;
  margin-bottom: 20px;
}

.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 10px;
  line-height: 1.4;
}

.step-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 图文列表区 */
.list-section {
  padding: 0 0 var(--spacer);
}

.list-grid {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: 48px;
  align-items: start;
}

.text-list {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.list-item {
  padding: 28px 32px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s ease;
}

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

.list-item:hover {
  background: #F8F7F3;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.date {
  font-size: 14px;
  color: var(--text-muted);
  font-family: var(--font-num);
}

.list-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 6px;
  line-height: 1.4;
}

.list-item h3 a {
  color: inherit;
}

.list-item h3 a:hover {
  color: var(--accent);
}

.list-item p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 640px;
}

.side-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 88px;
  transition: box-shadow 0.3s ease;
}

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

.side-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

.side-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-title);
  margin: 12px 0 8px;
  line-height: 1.4;
}

.side-card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* 系统要求深色区 */
.system-section {
  background: var(--primary-dark);
  padding: var(--spacer) 0;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.platform-col {
  padding: 40px 32px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.platform-col:last-child {
  border-right: none;
}

.platform-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.platform-icon {
  font-weight: 700;
  font-size: 16px;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 6px 14px;
  letter-spacing: 0.5px;
}

.platform-version {
  font-family: var(--font-num);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 4px 12px;
}

.platform-col ul li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 14px;
  line-height: 1.6;
}

.platform-col ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--success);
  font-weight: 700;
  font-size: 14px;
}

/* FAQ */
.faq-section {
  padding: var(--spacer) 0;
}

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

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

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 0;
  text-align: left;
  background: none;
}

.faq-tag {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(201, 100, 50, 0.08);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}

.faq-text {
  flex: 1;
  font-size: 17px;
  font-weight: 500;
  color: var(--text-title);
  line-height: 1.5;
}

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--primary);
  border-radius: 1px;
}

.faq-icon::before {
  width: 12px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 12px;
  transition: opacity 0.3s ease;
}

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

.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: #FFFFFF;
}

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

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

.faq-item.open .faq-answer {
  max-height: 320px;
}

.faq-answer p {
  padding: 0 0 24px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 640px;
}

/* CTA */
.cta-section {
  background: var(--primary-dark);
  padding: 80px 0;
}

.cta-inner {
  text-align: center;
  max-width: 640px;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
}

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

.cta-section .btn-primary {
  background: var(--accent);
}

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

.cta-section .btn-secondary {
  border-color: rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
}

.cta-section .btn-secondary:hover {
  background: #FFFFFF;
  color: var(--primary-dark);
  border-color: #FFFFFF;
}

.back-link {
  display: inline-block;
  margin-top: 24px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.back-link:hover {
  color: #FFFFFF;
}

/* 页脚 */
.site-footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding-top: 64px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 360px;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 20px;
}

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

.footer-links ul li a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.footer-copy {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}

.footer-copy p {
  font-size: 13px;
  color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 1024px) {
  :root {
    --spacer: 80px;
  }

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

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .intro-text {
    max-width: 100%;
  }

  .intro-image img {
    height: 320px;
  }

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

  .side-card {
    position: static;
  }

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

  .platform-col {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding: 32px 24px;
  }

  .platform-col:last-child {
    border-bottom: none;
  }
}

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

  .header-inner {
    height: 60px;
    gap: 16px;
  }

  .header-download {
    display: none;
  }

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

  .main-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 16px 32px rgba(20, 37, 60, 0.08);
  }

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

  .nav-link {
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 16px;
  }

  .nav-link.active::after {
    left: 16px;
    right: auto;
    width: 24px;
  }

  .page-banner {
    margin-top: 60px;
    padding: 40px 0;
  }

  .banner-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .banner-inner h1 {
    font-size: 26px;
  }

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

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

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

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

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    max-width: 280px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }

  :root {
    --spacer: 72px;
  }

  .logo-text {
    font-size: 18px;
  }

  .logo-badge {
    display: none;
  }

  .list-item {
    padding: 20px;
  }

  .item-meta {
    flex-wrap: wrap;
    gap: 8px;
  }

  .faq-question {
    flex-wrap: wrap;
    gap: 8px 12px;
  }

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

  .faq-tag {
    font-size: 11px;
  }

  .intro-image img {
    height: 220px;
  }

  .btn {
    padding: 0 24px;
  }
}

/* roulang page: article */
:root {
  --color-bg: #FAFAF7;
  --color-surface: #FFFFFF;
  --color-primary: #1E3A5F;
  --color-primary-deep: #14253C;
  --color-accent: #C96432;
  --color-accent-hover: #A84B20;
  --color-text: #1F2A3D;
  --color-body: #334155;
  --color-muted: #7C8698;
  --color-border: #E6E4DE;
  --color-success: #2E9B6B;
  --color-disabled: #B9C0CC;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(20,37,60,0.05), 0 4px 12px rgba(20,37,60,0.06);
  --shadow-hover: 0 4px 12px rgba(20,37,60,0.10), 0 12px 24px rgba(20,37,60,0.10);
  --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  background: var(--color-bg);
  color: var(--color-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-accent); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-cn);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1;
  white-space: nowrap;
  background: transparent;
}
.btn-primary { background: var(--color-accent); color: #FFFFFF; }
.btn-primary:hover { background: var(--color-accent-hover); color: #FFFFFF; transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #FFFFFF; }
.btn-outline-light { background: transparent; border-color: rgba(255,255,255,0.65); color: #FFFFFF; }
.btn-outline-light:hover { background: #FFFFFF; border-color: #FFFFFF; color: var(--color-primary-deep); }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(250,250,247,0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}
.main-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}
.logo { display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0; }
.logo:hover .logo-text { color: var(--color-primary); }
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  line-height: 1.2;
  font-family: var(--font-cn);
}
.logo-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(201,100,50,0.10);
  border: 1px solid rgba(201,100,50,0.25);
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 36px; margin-left: 48px; margin-right: auto; }
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-body);
  padding: 8px 0;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav-cta { flex-shrink: 0; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  transition: border-color 0.2s;
}
.nav-toggle:hover { border-color: var(--color-primary); }
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.main-nav.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.main-nav.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.main-nav.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 文章头部 ===== */
.article-hero {
  margin-top: 64px;
  padding: 120px 0 48px;
  background: linear-gradient(180deg, rgba(30,58,95,0.035) 0%, rgba(250,250,247,0) 100%);
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 28px;
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb-sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-primary); font-weight: 500; max-width: 480px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.article-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  max-width: 820px;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-muted);
}
.article-meta .meta-cat {
  background: rgba(30,58,95,0.07);
  color: var(--color-primary);
  padding: 3px 14px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 13px;
}

/* ===== 正文区 ===== */
.article-body { padding: 64px 0 0; background: var(--color-bg); }
.article-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: var(--shadow-sm);
}
.article-content h1, .article-content h2, .article-content h3, .article-content h4 {
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.35;
  margin: 36px 0 16px;
}
.article-content h1 { font-size: 28px; }
.article-content h2 { font-size: 24px; }
.article-content h3 { font-size: 20px; }
.article-content h4 { font-size: 18px; }
.article-content p {
  line-height: 1.75;
  color: var(--color-body);
  margin: 16px 0;
  font-size: 17px;
}
.article-content blockquote {
  border-left: 3px solid var(--color-primary);
  background: rgba(30,58,95,0.04);
  padding: 16px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-body);
  font-size: 16px;
}
.article-content img { border-radius: var(--radius-md); margin: 28px auto; }
.article-content ul, .article-content ol { margin: 16px 0; padding-left: 22px; color: var(--color-body); }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin: 8px 0; }
.article-content code {
  background: #F1F0EC;
  padding: 2px 8px;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  color: var(--color-primary);
}
.article-content pre {
  background: var(--color-primary-deep);
  color: #E6E4DE;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 28px 0;
  font-size: 14px;
  line-height: 1.6;
}
.article-content pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}
.article-content th, .article-content td {
  border: 1px solid var(--color-border);
  padding: 12px 16px;
  text-align: left;
}
.article-content th { background: rgba(30,58,95,0.04); color: var(--color-text); font-weight: 600; }

.article-empty { text-align: center; padding: 72px 24px; }
.article-empty p { font-size: 18px; color: var(--color-muted); margin-bottom: 28px; }

/* ===== 文末标签与翻页 ===== */
.article-extra { padding: 48px 0 72px; background: var(--color-bg); }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; }
.tag {
  display: inline-flex;
  align-items: center;
  background: rgba(30,58,95,0.06);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  transition: all 0.2s;
}
.tag:hover { border-color: var(--color-primary); }
.article-pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}
.pager-link { font-size: 15px; font-weight: 500; padding: 8px 0; }
.pager-link:hover { color: var(--color-accent); }

/* ===== 相关推荐 ===== */
.related-section {
  padding: 80px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
.section-head.center { justify-content: center; text-align: center; }
.section-more { font-size: 15px; color: var(--color-primary); font-weight: 500; flex-shrink: 0; }
.section-more:hover { color: var(--color-accent); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(30,58,95,0.18);
}
.related-cover { aspect-ratio: 16 / 9; overflow: hidden; background: #F1F0EC; }
.related-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-cover img { transform: scale(1.03); }
.related-body { padding: 22px 24px 24px; }
.related-body .tag { margin-bottom: 12px; }
.related-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin: 12px 0 8px;
  transition: color 0.2s;
}
.related-card:hover .related-body h3 { color: var(--color-accent); }
.related-body p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.related-date { font-size: 14px; color: var(--color-muted); }

/* ===== FAQ ===== */
.faq-section { padding: 80px 0; background: var(--color-bg); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item:first-child { border-top: 1px solid var(--color-border); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  padding: 20px 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-cn);
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--color-accent); }
.faq-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(30,58,95,0.06);
  color: var(--color-primary);
  font-size: 20px;
  font-weight: 400;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer p {
  padding: 0 0 20px;
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 320px; }

/* ===== CTA 下载区 ===== */
.cta-section { background: var(--color-primary-deep); padding: 80px 0; }
.cta-wrapper { display: flex; align-items: center; justify-content: space-between; gap: 56px; }
.cta-content { flex: 1; min-width: 0; }
.cta-content h2 {
  font-size: 32px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
  line-height: 1.3;
}
.cta-content p {
  font-size: 16px;
  color: rgba(255,255,255,0.72);
  margin-bottom: 32px;
  line-height: 1.7;
}
.cta-buttons { display: flex; flex-wrap: wrap; gap: 16px; }
.cta-note { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 20px; }
.cta-qr { flex-shrink: 0; text-align: center; }
.qr-box {
  width: 148px;
  height: 148px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
  margin: 0 auto;
}
.cta-qr p { color: rgba(255,255,255,0.8); font-size: 13px; margin-top: 14px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 380px;
  line-height: 1.7;
}
.footer-links h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}
.footer-links ul li { margin-bottom: 10px; }
.footer-links ul a { font-size: 14px; color: var(--color-muted); transition: color 0.2s; }
.footer-links ul a:hover { color: var(--color-accent); }
.footer-copy {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  text-align: center;
}
.footer-copy p { font-size: 13px; color: var(--color-muted); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-links { gap: 24px; margin-left: 24px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-title { font-size: 32px; }
  .section-head h2 { font-size: 28px; }
  .cta-content h2 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .site-header { height: 60px; }
  .main-nav { height: 60px; gap: 16px; }
  .logo-text { font-size: 17px; }
  .logo-badge { font-size: 11px; padding: 1px 8px; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav-links {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 32px rgba(20,37,60,0.10);
    padding: 8px 24px 16px;
    gap: 0;
    margin: 0;
  }
  .main-nav.nav-open .nav-links { display: flex; }
  .nav-link {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 16px;
  }
  .nav-link.active::after { display: none; }
  .nav-link.active { color: var(--color-accent); }
  .article-hero { margin-top: 60px; padding: 96px 0 32px; }
  .article-title { font-size: 28px; }
  .article-content { padding: 28px 24px; }
  .article-content p { font-size: 16px; }
  .cta-wrapper { flex-direction: column; align-items: center; text-align: center; }
  .cta-buttons { flex-direction: column; width: 100%; max-width: 360px; margin: 0 auto; }
  .cta-buttons .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .container-narrow { padding: 0 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-title { font-size: 24px; }
  .article-content { border-radius: var(--radius-md); padding: 24px 18px; }
  .article-hero { padding: 88px 0 28px; }
  .article-tags { gap: 8px; }
  .article-pager { flex-direction: column; }
  .section-head h2 { font-size: 24px; }
  .breadcrumb .current { max-width: 220px; }
  .cta-content h2 { font-size: 24px; }
  .qr-box { width: 128px; height: 128px; }
}