/* roulang page: index */
:root {
  --primary: #2E6FF2;
  --primary-dark: #2458C4;
  --primary-light: #EAF1FE;
  --accent: #FFB020;
  --bg: #F6F9FC;
  --card: #FFFFFF;
  --dark: #152238;
  --text: #1D2B3A;
  --text-secondary: #5A6B7D;
  --text-muted: #8B98A8;
  --border: #E6ECF3;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow: 0 1px 4px rgba(18,40,70,.05), 0 4px 12px rgba(18,40,70,.06);
  --shadow-hover: 0 8px 24px rgba(18,40,70,.10);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --transition: all .3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 30px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  transition: var(--transition);
  min-height: 44px;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.btn-amber {
  background: var(--accent);
  color: var(--dark);
}
.btn-amber:hover {
  background: #f5a100;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,176,32,.35);
}
.btn-light {
  background: #fff;
  color: var(--dark);
}
.btn-light:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.section { padding: 96px 0; }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}
.section-desc {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .35s ease;
}
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(18,40,70,.08);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}
.brand-highlight {
  color: var(--primary);
}
.brand-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.6;
  margin-left: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width .3s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--bg);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  padding: 150px 0 100px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: 20px; right: 0;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(46,111,242,.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
}
.hero-content {
  flex: 1 1 52%;
  min-width: 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.28;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-title span {
  color: var(--primary);
}
.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 24px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.trust-item i {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
}
.hero-visual {
  flex: 1 1 48%;
  min-width: 0;
  position: relative;
}
.hero-visual img {
  width: 100%;
  border-radius: 12px;
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.hero-float-card {
  position: absolute;
  left: 20px;
  bottom: 20px;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.hero-float-card .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,.2);
}
.hero-scroll {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: floatDown 2s ease-in-out infinite;
}
@keyframes floatDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(46,111,242,.3);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}
.feature-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Demo */
.demo-section {
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.demo-inner {
  display: flex;
  align-items: center;
  gap: 56px;
}
.demo-content {
  flex: 1 1 45%;
  min-width: 0;
}
.demo-content .section-tag {
  margin-bottom: 14px;
}
.demo-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
}
.demo-list {
  list-style: none;
  margin: 24px 0;
}
.demo-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}
.demo-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 10px;
  color: var(--primary);
  font-weight: 700;
}
.demo-browser {
  flex: 1 1 55%;
  min-width: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-hover);
  overflow: hidden;
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.browser-bar .browser-actions {
  display: flex;
  gap: 6px;
}
.browser-bar .browser-actions span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #E6ECF3;
  display: block;
}
.browser-bar .browser-actions span:first-child { background: #f87171; }
.browser-bar .browser-actions span:nth-child(2) { background: #fbbf24; }
.browser-bar .browser-actions span:last-child { background: #34d399; }
.browser-url {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.browser-body {
  padding: 0;
  line-height: 0;
}
.browser-body img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

/* Proof */
.proof-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 24px;
  align-items: stretch;
}
.proof-quote {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
}
.quote-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
}
.quote-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  border-left: 3px solid var(--primary);
  padding-left: 20px;
}
.quote-author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.quote-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}
.quote-author-name {
  font-size: 15px;
  font-weight: 600;
}
.quote-author-role {
  font-size: 13px;
  color: var(--text-muted);
}
.proof-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stat-card {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.stat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -1px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  border-top: 4px solid transparent;
}
.pricing-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-top-color: var(--primary);
}
.pricing-card.recommended {
  border-top-color: var(--accent);
  box-shadow: var(--shadow-hover);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent);
  color: var(--dark);
  font-size: 13px;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 999px;
}
.pricing-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.pricing-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 4px;
}
.pricing-price small {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
}
.pricing-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 20px;
}
.pricing-list {
  list-style: none;
  flex: 1;
  margin-bottom: 24px;
}
.pricing-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.pricing-list li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* FAQ */
.faq-section {
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: 16px;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46,111,242,.08);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  min-height: 44px;
}
.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform .35s ease;
}
.faq-item.active .faq-question .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
  padding: 0 24px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 20px;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  align-items: stretch;
}
.news-feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.news-feature-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
  background: #fff;
}
.news-feature-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}
.news-feature-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}
.news-feature-title a:hover {
  color: var(--primary);
}
.news-feature-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(46,111,242,.2);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.badge {
  display: inline-block;
  padding: 3px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.news-time {
  font-size: 13px;
  color: var(--text-muted);
}
.news-card-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
}
.news-card-title a:hover {
  color: var(--primary);
}
.news-card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  margin-top: auto;
}
.news-link:hover {
  text-decoration: underline;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 16px;
}

/* CTA */
.cta-section {
  background: var(--dark);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 90px 0;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(21,34,56,.88);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-title {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 16px;
}
.cta-desc {
  font-size: 17px;
  color: #A9B7C6;
  line-height: 1.8;
  margin-bottom: 36px;
}
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* Footer */
.site-footer {
  background: var(--dark);
  padding: 70px 0 0;
  color: #A9B7C6;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 50px;
}
.footer-brand h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #A9B7C6;
  margin-top: 12px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: #A9B7C6;
  padding: 4px 0;
  display: inline-flex;
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: #fff;
  transform: translateX(3px);
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: #A9B7C6;
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  text-align: center;
  font-size: 14px;
  color: #8596A8;
}
.footer-bottom a {
  color: #A9B7C6;
}
.footer-bottom a:hover {
  color: #fff;
}

/* Float CTA */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
}
.float-cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--dark);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 26px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(255,176,32,.4);
  transition: var(--transition);
  min-height: 44px;
}
.float-cta-link:hover {
  transform: scale(1.05);
  background: #f5a100;
  box-shadow: 0 8px 24px rgba(255,176,32,.5);
}

/* Mobile drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  z-index: 999;
  flex-direction: column;
  padding: 32px 24px;
  gap: 8px;
  overflow-y: auto;
}
.mobile-drawer.open {
  display: flex;
}
.mobile-drawer a {
  padding: 14px 12px;
  border-radius: 8px;
  font-size: 17px;
  color: var(--text);
  font-weight: 500;
  border-bottom: 1px solid var(--bg);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.mobile-drawer a:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.mobile-drawer .btn {
  margin-top: 20px;
}

/* Responsive */
@media screen and (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .nav-cta {
    display: none;
  }
  .hero {
    padding: 130px 0 80px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-inner {
    gap: 32px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .demo-inner {
    flex-direction: column;
    gap: 40px;
  }
  .demo-content,
  .demo-browser {
    flex: 1 1 100%;
  }
  .proof-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .pricing-card {
    padding: 24px 20px;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media screen and (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .section-title {
    font-size: 24px;
  }
  .container {
    padding: 0 16px;
  }
  .header-inner {
    padding: 0 16px;
  }
  .hero {
    padding: 120px 0 60px;
  }
  .hero-inner {
    flex-direction: column;
  }
  .hero-content {
    flex: 1 1 100%;
  }
  .hero-visual {
    flex: 1 1 100%;
    margin-top: 20px;
  }
  .hero-title {
    font-size: 27px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-scroll {
    display: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .pricing-card.recommended {
    order: -1;
  }
  .faq-question {
    font-size: 15px;
    padding: 16px 18px;
  }
  .faq-answer {
    padding: 0 18px;
    font-size: 14px;
  }
  .faq-item.active .faq-answer {
    padding-bottom: 16px;
  }
  .cta-title {
    font-size: 26px;
  }
  .float-cta {
    right: 16px;
    bottom: 16px;
  }
  .float-cta-link {
    width: 52px;
    height: 52px;
    padding: 0;
    border-radius: 50%;
    justify-content: center;
    font-size: 0;
  }
  .float-cta-link::before {
    content: "→";
    font-size: 22px;
    line-height: 1;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media screen and (max-width: 520px) {
  .brand-text {
    font-size: 17px;
  }
  .hero-title {
    font-size: 24px;
  }
  .section-tag {
    font-size: 12px;
  }
  .news-feature-body {
    padding: 20px;
  }
  .news-card {
    padding: 18px;
  }
  .stat-num {
    font-size: 30px;
  }
}

/* roulang page: article */
:root {
    --primary: #2E6FF2;
    --primary-dark: #2458C4;
    --primary-light: #EAF1FE;
    --accent: #FFB020;
    --bg: #F6F9FC;
    --card-bg: #FFFFFF;
    --text: #1D2B3A;
    --text-secondary: #5A6B7D;
    --text-muted: #8B98A8;
    --border: #E6ECF3;
    --dark: #152238;
    --radius: 10px;
    --radius-sm: 8px;
    --shadow: 0 1px 4px rgba(18,40,70,.05), 0 4px 12px rgba(18,40,70,.06);
    --shadow-hover: 0 8px 24px rgba(18,40,70,.10);
    --container: 1200px;
    --spacing: 96px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif; background: var(--bg); color: var(--text); line-height: 1.75; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 840px; }

/* ========== 按钮 ========== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 8px; font-size: 15px; font-weight: 600; border: 1px solid transparent; cursor: pointer; transition: all .25s ease; line-height: 1.4; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(46,111,242,.28); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(46,111,242,.25); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--border); }
.btn-outline:hover { background: var(--primary-light); border-color: var(--primary); }
.btn-outline:active { background: #dbe6fd; }

/* ========== 标签 / 徽章 ========== */
.tag { display: inline-block; padding: 4px 14px; border-radius: 999px; font-size: 13px; background: var(--primary-light); color: var(--primary); line-height: 1.5; }
.tag-blue { background: var(--primary-light); color: var(--primary); }
.brand-badge { display: inline-flex; align-items: center; background: var(--accent); color: #fff; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; line-height: 1.4; }

/* ========== 顶部导航 ========== */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--border); box-shadow: 0 2px 12px rgba(18,40,70,.06); backdrop-filter: blur(8px); }
.header-inner { max-width: var(--container); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; height: 68px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.brand-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: .5px; }
.brand-highlight { color: var(--primary); font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: 8px; }
.nav-link { font-size: 15px; color: var(--text-secondary); padding: 22px 0; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s; white-space: nowrap; }
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.nav-cta { margin-left: auto; background: var(--primary); color: #fff; padding: 10px 24px; border-radius: 8px; font-size: 15px; font-weight: 600; transition: all .25s; white-space: nowrap; box-shadow: 0 2px 8px rgba(46,111,242,.25); }
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(46,111,242,.35); }
.nav-cta:active { transform: translateY(0); }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: none; cursor: pointer; padding: 10px; border-radius: 8px; transition: background .2s; }
.nav-toggle:hover { background: var(--primary-light); }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s, opacity .3s; }

/* ========== 面包屑 ========== */
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; font-size: 14px; color: var(--text-muted); margin-bottom: 24px; gap: 6px; }
.breadcrumb a { color: var(--text-muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--text-muted); opacity: .5; }
.breadcrumb-current { color: var(--text-secondary); max-width: 360px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; display: inline-block; }

/* ========== 文章 Hero ========== */
.article-hero { position: relative; background: url('/assets/images/backpic/back-1.webp') center 30% / cover no-repeat; padding: 64px 0 56px; border-bottom: 1px solid var(--border); }
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(255,255,255,.97) 30%, rgba(246,249,252,.92) 70%, rgba(234,241,254,.88) 100%); }
.article-hero .container { position: relative; z-index: 1; }
.article-title { font-size: 38px; font-weight: 700; line-height: 1.3; color: var(--text); max-width: 900px; margin-bottom: 20px; letter-spacing: .3px; }
.article-meta { display: flex; gap: 28px; color: var(--text-muted); font-size: 14px; flex-wrap: wrap; align-items: center; }
.article-meta-item { display: inline-flex; align-items: center; gap: 6px; position: relative; }
.article-meta-item + .article-meta-item::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--border); position: absolute; left: -16px; top: 50%; transform: translateY(-50%); }

/* ========== 正文区 ========== */
.article-main { padding: 56px 0 40px; }
.article-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 48px 52px; }
.article-content { font-size: 16px; line-height: 1.85; color: var(--text); }
.article-content p { margin-bottom: 1.5em; }
.article-content h2 { font-size: 24px; font-weight: 700; margin: 40px 0 16px; padding-top: 8px; color: var(--text); }
.article-content h3 { font-size: 19px; font-weight: 600; margin: 28px 0 12px; color: var(--text); }
.article-content h4 { font-size: 17px; font-weight: 600; margin: 20px 0 10px; color: var(--text); }
.article-content ul, .article-content ol { margin: 0 0 1.5em 1.6em; }
.article-content li { margin-bottom: .4em; }
.article-content blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 14px 22px; border-radius: 0 8px 8px 0; margin: 0 0 1.5em; color: var(--text-secondary); }
.article-content img { border-radius: 8px; border: 1px solid var(--border); margin: 24px 0; max-width: 100%; height: auto; }
.article-content a { color: var(--primary); border-bottom: 1px solid rgba(46,111,242,.3); transition: all .2s; }
.article-content a:hover { border-bottom-color: var(--primary); }
.article-content pre { background: #0f172a; color: #e2e8f0; padding: 20px; border-radius: 8px; overflow-x: auto; margin: 0 0 1.5em; font-size: 14px; line-height: 1.7; }
.article-content table { width: 100%; border-collapse: collapse; margin: 0 0 1.5em; font-size: 15px; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--primary-light); font-weight: 600; }

/* 标签区 */
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border); }

/* 内容未找到 */
.not-found { text-align: center; padding: 48px 20px; }
.not-found h2 { font-size: 26px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.not-found p { color: var(--text-secondary); margin-bottom: 28px; }

/* ========== 相关推荐 ========== */
.related-section { padding: 64px 0 72px; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 36px; flex-wrap: wrap; gap: 16px; }
.section-tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 5px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.section-title { font-size: 28px; font-weight: 700; color: var(--text); line-height: 1.35; margin-top: 4px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-cover { display: block; overflow: hidden; }
.related-cover img { width: 100%; height: 180px; object-fit: cover; transition: transform .4s ease; }
.related-card:hover .related-cover img { transform: scale(1.04); }
.related-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.related-body .tag { align-self: flex-start; margin-bottom: 12px; }
.related-body h3 { font-size: 18px; font-weight: 600; line-height: 1.5; margin-bottom: 10px; }
.related-body h3 a { color: var(--text); transition: color .2s; }
.related-body h3 a:hover { color: var(--primary); }
.related-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-time { font-size: 13px; color: var(--text-muted); margin-top: auto; }

/* ========== 返回入口 ========== */
.back-section { padding: 0 0 80px; }
.back-links { display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px 32px; }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-size: 15px; font-weight: 500; padding: 8px 16px; border-radius: 8px; transition: background .2s, color .2s; }
.back-link:hover { background: var(--primary-light); }
.back-link + .back-link { border-left: 1px solid var(--border); }

/* ========== 页脚 ========== */
.site-footer { background: var(--dark); color: #A9B7C6; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.75; color: #A9B7C6; max-width: 320px; }
.footer-col h4 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #A9B7C6; font-size: 14px; transition: color .2s, padding-left .2s; }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { font-size: 14px; color: #A9B7C6; display: flex; align-items: center; gap: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; text-align: center; font-size: 13px; color: rgba(169,183,198,.7); }
.footer-bottom a { color: rgba(169,183,198,.85); }
.footer-bottom a:hover { color: #fff; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .nav-links, .nav-cta { display: none; }
    .nav-toggle { display: flex; margin-left: auto; }
    .site-header.nav-open .nav-links { display: flex; position: fixed; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: center; gap: 4px; padding: 28px 24px 32px; border-bottom: 1px solid var(--border); box-shadow: 0 24px 40px rgba(18,40,70,.12); z-index: 999; }
    .site-header.nav-open .nav-links .nav-link { padding: 14px 0; font-size: 16px; width: 100%; text-align: center; border-bottom: 1px solid var(--border); }
    .site-header.nav-open .nav-links .nav-link.active { border-bottom-color: var(--primary); }
    .site-header.nav-open .nav-cta { display: inline-flex; margin: 16px auto 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .article-title { font-size: 32px; }
    .article-card { padding: 36px 32px; }
}
@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .article-hero { padding: 44px 0 40px; }
    .article-title { font-size: 26px; line-height: 1.35; }
    .article-meta { gap: 16px 22px; }
    .article-main { padding: 36px 0 28px; }
    .article-card { padding: 24px 20px; border-radius: 8px; }
    .article-content { font-size: 15px; }
    .related-section { padding: 44px 0 56px; }
    .section-title { font-size: 22px; }
    .related-grid { grid-template-columns: 1fr; gap: 20px; }
    .back-section { padding: 0 0 56px; }
    .back-links { flex-direction: column; padding: 24px 20px; }
    .back-link + .back-link { border-left: none; border-top: 1px solid var(--border); }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-brand p { max-width: 100%; }
    .breadcrumb { font-size: 13px; }
    .breadcrumb-current { max-width: 180px; }
}
@media (max-width: 520px) {
    .brand-text { font-size: 17px; }
    .header-inner { gap: 12px; padding: 0 16px; height: 60px; }
    .site-header.nav-open .nav-links { top: 60px; }
    .article-meta { font-size: 13px; gap: 12px 18px; }
    .related-cover img { height: 150px; }
    .footer-bottom { padding: 18px 16px; line-height: 1.6; }
}

/* roulang page: category1 */
:root {
            --primary: #2E6FF2;
            --primary-dark: #2458C4;
            --primary-light: #EAF1FE;
            --accent: #FFB020;
            --bg: #F6F9FC;
            --card-bg: #FFFFFF;
            --dark: #152238;
            --text: #1D2B3A;
            --text-secondary: #5A6B7D;
            --text-muted: #8B98A8;
            --border: #E6ECF3;
            --radius: 10px;
            --radius-sm: 8px;
            --radius-lg: 12px;
            --shadow: 0 1px 4px rgba(18, 40, 70, .05), 0 4px 12px rgba(18, 40, 70, .06);
            --shadow-hover: 0 8px 24px rgba(18, 40, 70, .10);
            --container: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s;
        }
        a:hover {
            color: var(--primary-dark);
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

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

        /* ---------- Header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .96);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: var(--header-height);
            display: flex;
            align-items: center;
            gap: 32px;
        }

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

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .5px;
            line-height: 1.2;
        }

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

        .brand-badge {
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 999px;
            letter-spacing: 1px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-left: auto;
        }

        .nav-link {
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
            white-space: nowrap;
            transition: color .25s;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .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-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            transition: all .3s;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 14px rgba(46, 111, 242, .30);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            background: none;
            border: 0;
            padding: 10px;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .3s;
        }

        /* ---------- Breadcrumb ---------- */
        .breadcrumb-bar {
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 13px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: #C4CFDA;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ---------- Page Hero ---------- */
        .page-hero {
            position: relative;
            background: linear-gradient(rgba(21, 34, 56, .88), rgba(21, 34, 56, .92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 80px 0 68px;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            right: 6%;
            top: 50%;
            transform: translateY(-50%);
            width: 130px;
            height: 130px;
            border: 2px solid rgba(255, 255, 255, .10);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            right: 10%;
            bottom: -40px;
            width: 90px;
            height: 90px;
            border: 2px solid rgba(255, 255, 255, .08);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(255, 255, 255, .12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .16);
            padding: 5px 16px;
            border-radius: 999px;
            font-size: 13px;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .page-hero h1 {
            font-size: 36px;
            line-height: 1.25;
            font-weight: 700;
            margin-bottom: 16px;
            max-width: 680px;
            color: #fff;
        }

        .page-hero .hero-desc {
            font-size: 16px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .84);
            max-width: 640px;
            margin-bottom: 24px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .10);
            border: 1px solid rgba(255, 255, 255, .12);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            color: rgba(255, 255, 255, .88);
        }

        /* ---------- Section Head ---------- */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ---------- Steps Section ---------- */
        .steps-section {
            padding: 72px 0 40px;
        }

        .steps-wrap {
            display: grid;
            grid-template-columns: 1.35fr .65fr;
            gap: 40px;
            align-items: start;
        }

        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .step-item {
            display: flex;
            gap: 20px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            transition: box-shadow .3s, transform .3s;
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .step-num {
            flex-shrink: 0;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            box-shadow: 0 4px 10px rgba(46, 111, 242, .22);
        }

        .step-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }

        .step-content p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .steps-aside {
            position: sticky;
            top: calc(var(--header-height) + 24px);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .steps-aside img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3;
            border: 1px solid var(--border);
        }

        .steps-note {
            background: var(--primary-light);
            border: 1px solid rgba(46, 111, 242, .18);
            border-radius: var(--radius);
            padding: 20px 22px;
        }
        .steps-note strong {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }
        .steps-note p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ---------- Tips Section ---------- */
        .tips-section {
            padding: 40px 0 72px;
        }

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

        .tip-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            transition: box-shadow .3s, transform .3s;
        }
        .tip-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .tip-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .tip-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }

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

        /* ---------- FAQ Section ---------- */
        .faq-section {
            padding: 64px 0 80px;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }

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

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            background: var(--card-bg);
            transition: border-color .3s, box-shadow .3s;
            overflow: hidden;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 111, 242, .08);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            user-select: none;
            transition: color .2s;
        }
        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            transition: transform .3s;
            line-height: 1;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
            border-top: 1px solid transparent;
        }
        .faq-item.active .faq-answer {
            border-top-color: var(--border);
            padding-top: 14px;
        }

        /* ---------- CTA Section ---------- */
        .cta-section {
            background: var(--dark);
            padding: 72px 0 76px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            left: 50%;
            top: -60px;
            transform: translateX(-50%);
            width: 400px;
            height: 120px;
            background: radial-gradient(ellipse, rgba(46, 111, 242, .18), transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-section p {
            color: #A9B7C6;
            font-size: 15px;
            margin-bottom: 30px;
        }

        .cta-btn {
            display: inline-block;
            background: var(--accent);
            color: var(--dark);
            padding: 14px 36px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 16px;
            transition: all .3s;
        }
        .cta-btn:hover {
            background: #fff;
            color: var(--dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .22);
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--dark);
            color: #A9B7C6;
            padding-top: 64px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: #A9B7C6;
            line-height: 1.75;
            font-size: 14px;
            max-width: 280px;
        }

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

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            color: #A9B7C6;
            transition: color .2s, padding-left .2s;
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-contact li {
            line-height: 1.7;
        }

        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 13px;
            color: #7E8B9C;
        }
        .footer-bottom a {
            color: #A9B7C6;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1024px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 24px 20px;
                border-bottom: 1px solid var(--border);
                display: none;
                box-shadow: 0 12px 24px rgba(18, 40, 70, .08);
                z-index: 999;
            }
            .site-header.nav-open .nav-links {
                display: flex;
            }
            .nav-link {
                padding: 14px 0;
                border-bottom: 1px solid #F0F3F8;
                font-size: 15px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: auto;
            }
            .nav-toggle {
                margin-left: 4px;
            }

            .steps-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .steps-aside {
                position: static;
                max-width: 520px;
            }

            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tip-card:last-child {
                grid-column: span 2;
            }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
                gap: 16px;
            }
            .brand-text {
                font-size: 18px;
            }
            .brand-badge {
                font-size: 10px;
                padding: 2px 8px;
            }
            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }

            .page-hero {
                padding: 56px 0 48px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .page-hero::before,
            .page-hero::after {
                display: none;
            }

            .section-head {
                margin-bottom: 36px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .section-head p {
                font-size: 14px;
            }

            .steps-section {
                padding: 56px 0 32px;
            }
            .step-item {
                flex-direction: column;
                gap: 14px;
                padding: 24px 20px;
            }
            .step-num {
                width: 40px;
                height: 40px;
                font-size: 17px;
            }
            .step-content h3 {
                font-size: 17px;
            }
            .step-content p {
                font-size: 14px;
            }

            .tips-section {
                padding: 32px 0 56px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .tip-card:last-child {
                grid-column: auto;
            }

            .faq-section {
                padding: 56px 0 64px;
            }
            .faq-question {
                font-size: 15px;
                padding: 18px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px 18px;
            }

            .cta-section {
                padding: 56px 0 60px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-btn {
                padding: 13px 28px;
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 36px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                padding: 20px 16px;
                font-size: 12px;
                line-height: 1.7;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 10px;
            }
            .nav-cta {
                display: none;
            }
            .nav-links {
                padding: 8px 16px 16px;
            }
            .steps-aside img {
                aspect-ratio: 16 / 10;
            }
            .cta-section h2 {
                font-size: 20px;
            }
        }

/* roulang page: category2 */
:root {
  --primary: #2E6FF2;
  --primary-dark: #2458C4;
  --primary-light: #EAF1FE;
  --accent: #FFB020;
  --bg: #F6F9FC;
  --card: #FFFFFF;
  --dark: #152238;
  --text: #1D2B3A;
  --text-muted: #5A6B7D;
  --text-faint: #8B98A8;
  --border: #E6ECF3;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 4px rgba(18, 40, 70, .05), 0 4px 12px rgba(18, 40, 70, .06);
  --shadow-lg: 0 8px 24px rgba(18, 40, 70, .10);
  --transition: all .25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; border: none; background: none; cursor: pointer; }
input { font: inherit; }

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

/* ---------- 头部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid rgba(230, 236, 243, .9);
  z-index: 1000;
  transition: box-shadow .25s ease;
}
.site-header.scrolled { box-shadow: 0 4px 16px rgba(18, 40, 70, .07); }
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}
.brand-highlight { color: var(--primary); }
.brand-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 2px 8px;
  line-height: 1.5;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); font-weight: 600; background: var(--primary-light); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 20px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 999px;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(46, 111, 242, .28); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 24px;
  box-shadow: 0 16px 24px rgba(18, 40, 70, .08);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: var(--transition);
}
.mobile-menu a:hover { color: var(--primary); background: var(--primary-light); }
.mobile-menu .mobile-cta {
  margin-top: 12px;
  text-align: center;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
}
.mobile-menu .mobile-cta:hover { background: var(--primary-dark); color: #fff; }

/* ---------- 页面横幅 ---------- */
.page-banner {
  position: relative;
  padding: 168px 0 72px;
  background-color: var(--bg);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, .88);
}
.page-banner .container { position: relative; z-index: 2; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--primary); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary-dark); }
.breadcrumb-sep { color: var(--border); }

.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 14px;
}
.banner-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.page-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
}
.page-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.8;
}

/* ---------- 通用板块头 ---------- */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 14px;
}
.section-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 12px;
}
.section-head p { font-size: 15px; color: var(--text-muted); }

/* ---------- 问答网格 ---------- */
.qa-section { padding: 96px 0; }
.qa-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.qa-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.qa-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: rgba(46, 111, 242, .35);
}
.qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}
.qa-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
.qa-q h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}
.qa-a {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  padding-left: 40px;
}

/* ---------- 特色详解 ---------- */
.detail-section { padding: 96px 0; background: #fff; border-top: 1px solid var(--border); }
.detail-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.detail-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.detail-content .section-tag { margin-bottom: 10px; }
.detail-content h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 14px;
  color: var(--text);
}
.detail-content > p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.feature-list li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 15px;
  color: var(--text-muted);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 10px;
}
.detail-content .btn { margin-top: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(46, 111, 242, .30); }
.btn-primary:active { transform: translateY(0); }

/* ---------- CTA 转化区 ---------- */
.cta-section { background: var(--dark); padding: 72px 0; }
.cta-section .container { text-align: center; }
.cta-section h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.4;
}
.cta-section p {
  font-size: 15px;
  color: rgba(169, 183, 198, .9);
  max-width: 560px;
  margin: 0 auto 28px;
}
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-light { background: #fff; color: var(--dark); }
.btn-light:hover { background: var(--primary-light); color: var(--primary); transform: translateY(-2px); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.btn-outline-light:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #A9B7C6; font-size: 14px; }
.site-footer .container { padding-top: 64px; padding-bottom: 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand h3 {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.footer-brand p { line-height: 1.8; color: #A9B7C6; font-size: 14px; }
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: #A9B7C6;
  transition: var(--transition);
}
.footer-col ul li a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { padding-left: 20px; position: relative; }
.footer-contact li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding-top: 22px;
  text-align: center;
  font-size: 13px;
  color: #7D8CA0;
}
.footer-bottom a { color: #A9B7C6; transition: var(--transition); }
.footer-bottom a:hover { color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .page-banner { padding-top: 140px; }
  .qa-grid { grid-template-columns: 1fr 1fr; }
  .detail-wrap { gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .header-inner { padding: 0 16px; }
  .page-banner { padding: 124px 0 48px; }
  .page-title { font-size: 26px; }
  .page-desc { font-size: 15px; }
  .section-head h2 { font-size: 23px; }
  .section-head { margin-bottom: 32px; }
  .qa-section { padding: 64px 0; }
  .qa-grid { grid-template-columns: 1fr; gap: 16px; }
  .qa-card { padding: 22px; }
  .qa-a { padding-left: 0; }
  .detail-section { padding: 64px 0; }
  .detail-wrap { grid-template-columns: 1fr; gap: 28px; }
  .detail-content h2 { font-size: 23px; }
  .cta-section { padding: 56px 0; }
  .cta-section h2 { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer .container { padding-top: 48px; }
}
@media (max-width: 520px) {
  .page-title { font-size: 24px; }
  .cta-actions { flex-direction: column; }
  .btn { width: 100%; }
}