/* roulang page: index */
:root {
  --color-primary: #4A7FB5;
  --color-primary-dark: #2B4D7E;
  --color-accent: #E8A33D;
  --color-accent-dark: #B26F1B;
  --color-bg: #F4F7FA;
  --color-card: #FFFFFF;
  --color-text: #1C2B39;
  --color-text-secondary: #5B6B7B;
  --color-text-muted: #8A97A5;
  --color-border: #E3EAF0;
  --color-footer: #122A3E;
  --color-footer-text: #C6D4E0;
  --color-success: #2E8B6D;
  --color-warning: #C0422B;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-img: 12px;
  --shadow-card: 0 2px 4px rgba(27,55,82,0.06), 0 12px 24px rgba(27,55,82,0.07);
  --shadow-card-hover: 0 4px 8px rgba(27,55,82,0.08), 0 20px 40px rgba(27,55,82,0.12);
  --space-section: clamp(3rem, 6vw, 5rem);
  --container-width: 1200px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }
input, select, textarea { font-family: inherit; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-alt { background: #EDF2F6; }

/* 面包屑 */
.breadcrumb {
  padding-top: 110px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.breadcrumb a { color: var(--color-text-muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { margin: 0 8px; color: #C0CBD6; }

/* 导航 */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1100px;
  width: 100%;
  background: rgba(255,255,255,0.94);
  border-radius: var(--radius-btn);
  padding: 10px 16px 10px 24px;
  box-shadow: 0 4px 20px rgba(27,55,82,0.10);
  pointer-events: auto;
  transition: box-shadow .3s ease;
}
.nav-wrap:hover { box-shadow: 0 6px 24px rgba(27,55,82,0.14); }
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background .2s ease, color .2s ease;
}
.nav-links a:hover { background: rgba(74,127,181,0.18); color: var(--color-primary); }
.nav-links a.active { background: rgba(74,127,181,0.10); color: var(--color-primary); font-weight: 600; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-accent);
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 9px 22px;
  border-radius: 999px;
  transition: background .2s ease, color .2s ease, transform .15s ease;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--color-accent-dark); color: #fff; }
.nav-cta:active { transform: scale(0.97); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform .3s ease, opacity .3s ease; }
.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;
  position: fixed;
  top: 80px;
  left: 16px;
  right: 16px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(27,55,82,0.16);
  padding: 12px;
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  font-weight: 500;
}
.mobile-menu a:hover { background: #EDF3F9; color: var(--color-primary); }
.mobile-menu a.active { background: rgba(74,127,181,0.10); color: var(--color-primary); font-weight: 600; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .15s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--color-accent); color: var(--color-text); }
.btn-primary:hover { background: var(--color-accent-dark); color: #fff; box-shadow: 0 4px 16px rgba(232,163,61,0.35); }
.btn-secondary { background: transparent; border: 1px solid var(--color-primary); color: var(--color-primary); }
.btn-secondary:hover { background: rgba(74,127,181,0.08); border-color: var(--color-primary-dark); color: var(--color-primary-dark); }
.btn-lg { height: 56px; padding: 0 40px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Hero */
.hero {
  padding: clamp(130px, 14vw, 190px) 0 var(--space-section);
  background:
    radial-gradient(circle at 85% 20%, rgba(74,127,181,0.05) 0, transparent 40%),
    var(--color-bg);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}
.hero-content .tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,163,61,0.12);
  color: #9A6B15;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-content h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--color-text);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 30px;
}
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.8rem; color: var(--color-text-muted); }
.hero-meta span { display: inline-flex; align-items: center; gap: 5px; }
.hero-meta svg { width: 14px; height: 14px; }
.hero-visual {
  position: relative;
  border-radius: 24px;
  min-height: 420px;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-visual::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(244,247,250,0) 0%, rgba(244,247,250,0.4) 100%); pointer-events: none; }
.hero-shot-main {
  width: 72%;
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(27,55,82,0.18);
  border: 4px solid #fff;
  position: relative;
  z-index: 2;
}
.hero-shot-float {
  position: absolute;
  bottom: -18px;
  right: -6px;
  width: 45%;
  border-radius: 12px;
  box-shadow: 0 12px 28px rgba(27,55,82,0.16);
  border: 3px solid #fff;
  z-index: 3;
}

/* 板块标题 */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 32px;
}
.section-head h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.section-head p { color: var(--color-text-muted); font-size: 0.9rem; }
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.88rem;
  color: var(--color-primary);
  font-weight: 500;
  transition: color .2s ease;
  white-space: nowrap;
}
.link-more:hover { color: var(--color-primary-dark); }
.link-more::after { content: '→'; transition: transform .2s ease; }
.link-more:hover::after { transform: translateX(3px); }

/* 特征 */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.feature-item {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 28px 26px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
  border: 1px solid rgba(227,234,240,0.5);
}
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #EDF3F9;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  stroke: var(--color-primary);
  stroke-width: 1.5px;
  fill: none;
}
.feature-item h3 { font-size: 0.98rem; font-weight: 600; margin-bottom: 4px; line-height: 1.4; }
.feature-item p { font-size: 0.85rem; color: var(--color-text-secondary); line-height: 1.6; }

/* 截图轮播 */
.slider-section { background: #EDF2F6; }
.slider-arrows { display: flex; gap: 8px; }
.slider-arrow {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: var(--color-text-secondary);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.slider-arrow:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.slider-wrap { position: relative; }
.slider-viewport { overflow: hidden; border-radius: var(--radius-card); }
.slider-track { display: flex; transition: transform .35s ease; }
.slide { flex: 0 0 100%; min-width: 0; }
.slide-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.slide-media {
  aspect-ratio: 16 / 9;
  background: #DCE6F0;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.slide-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.slide-media:hover img { transform: scale(1.02); }
.slide-info { padding: 16px 20px; min-height: 54px; display: flex; align-items: center; }
.slide-info h3 { font-size: 1rem; font-weight: 600; }
.slide-info p { font-size: 0.85rem; color: var(--color-text-muted); margin-left: 12px; }
.slider-dots { display: flex; justify-content: center; gap: 8px; margin-top: 20px; }
.slider-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #C7D3DF;
  transition: background .2s ease, transform .2s ease;
}
.slider-dot.active { background: var(--color-primary); transform: scale(1.3); }

/* 系统要求 */
.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.spec-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(227,234,240,0.5);
  position: relative;
}
.spec-badge {
  display: inline-block;
  background: #EDF3F9;
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.spec-card.recommend .spec-badge { background: rgba(232,163,61,0.14); color: #9A6B15; }
.spec-card dl { display: grid; grid-template-columns: 90px 1fr; gap: 14px 12px; }
.spec-card dt { color: var(--color-text-muted); font-size: 0.85rem; }
.spec-card dd { font-weight: 600; font-size: 0.9rem; font-variant-numeric: tabular-nums; text-align: right; }

/* 评价墙 */
.reviews-overview {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}
.rating-stars { color: var(--color-accent); font-size: 1.2rem; letter-spacing: 2px; }
.rating-score { font-size: 1.6rem; font-weight: 700; color: var(--color-text); }
.rating-count { font-size: 0.85rem; color: var(--color-text-muted); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 28px 26px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
  border: 1px solid rgba(227,234,240,0.5);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.review-stars { color: var(--color-accent); font-size: 0.85rem; letter-spacing: 1px; margin-bottom: 12px; }
.review-text { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 16px; max-width: 32em; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: #EDF3F9;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
}
.review-meta .name { font-size: 0.88rem; font-weight: 600; color: var(--color-text); }
.review-meta .meta { font-size: 0.78rem; color: var(--color-text-muted); }

/* 第二下载区 */
.download-zone { background: #E8F0F7; }
.download-box {
  background: var(--color-card);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.download-box .version-line { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 24px; }
.download-box .version-line span { color: var(--color-text-secondary); font-weight: 600; }
.download-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; max-width: 640px; margin: 0 auto; }
.download-btns .btn { flex: 1; min-width: 200px; }

/* 资讯列表 */
.news-list { border-top: 1px solid var(--color-border); }
.news-item {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background .2s ease;
}
.news-item:hover { background: rgba(244,247,250,0.6); }
.news-date {
  text-align: center;
  padding: 6px 0;
  border-right: 1px solid var(--color-border);
  margin-right: 4px;
}
.news-date .month { display: block; font-size: 0.75rem; color: var(--color-text-muted); letter-spacing: 0.05em; }
.news-date .day { display: block; font-size: 1.3rem; font-weight: 700; color: var(--color-text); font-variant-numeric: tabular-nums; line-height: 1.2; }
.news-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.news-body h3 a { transition: color .2s ease; }
.news-body h3 a:hover { color: var(--color-primary); }
.news-body p { font-size: 0.85rem; color: var(--color-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.news-cat {
  display: inline-block;
  background: rgba(74,127,181,0.10);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.empty-state {
  background: #F0F3F6;
  border-radius: var(--radius-card);
  padding: 60px 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}
.empty-icon { display: block; font-size: 2rem; margin-bottom: 8px; opacity: 0.5; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--color-card);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border: 1px solid rgba(227,234,240,0.5);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background .2s ease;
}
.faq-question:hover { background: #F8FAFC; }
.faq-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(232,163,61,0.12);
  color: #B26F1B;
  font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform .25s ease;
}
.faq-item.open .faq-icon { transform: rotate(135deg); }
.faq-answer { padding: 0 24px 20px 66px; font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.7; display: none; }
.faq-item.open .faq-answer { display: block; }

/* 页脚前 CTA */
.prefooter-cta { padding: clamp(3rem, 6vw, 5rem) 0; text-align: center; }
.prefooter-cta .cta-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(74,127,181,0.08);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.prefooter-cta h2 { font-size: clamp(1.4rem, 2.8vw, 2rem); font-weight: 700; margin-bottom: 24px; line-height: 1.35; }
.prefooter-cta p { color: var(--color-text-muted); max-width: 480px; margin: 0 auto 32px; font-size: 0.95rem; }

/* 页脚 */
.site-footer { background: var(--color-footer); color: var(--color-footer-text); padding-top: 64px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo { color: #fff; font-size: 1.15rem; margin-bottom: 14px; }
.footer-brand .logo-icon { background: var(--color-accent); color: var(--color-text); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; color: #9FB4C7; max-width: 280px; }
.footer-col h4 { color: #E8EEF3; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; padding: 4px 0; font-size: 0.87rem; color: #9FB4C7; transition: color .2s ease; }
.footer-col a:hover { color: var(--color-accent); }
.footer-contact li { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 0.87rem; color: #9FB4C7; }
.footer-contact svg { width: 16px; height: 16px; stroke: var(--color-accent); fill: none; stroke-width: 1.6; flex-shrink: 0; }
.copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  font-size: 0.82rem;
  color: #6F8AA0;
  text-align: center;
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #EFF3F6; }
::-webkit-scrollbar-thumb { background: #C7D3DF; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #A9B8C7; }

/* 响应式 */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { min-height: 340px; }
  .reviews-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-header { top: 10px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-wrap { border-radius: 999px; padding: 8px 12px 8px 20px; }
  .mobile-menu.open { display: block; }
  .hero { padding: 110px 0 var(--space-section); }
  .hero-inner { gap: 32px; }
  .hero-content h1 { font-size: 1.75rem; }
  .hero-btns { flex-direction: column; align-items: stretch; }
  .hero-btns .btn { width: 100%; }
  .hero-visual { min-height: 240px; }
  .hero-shot-main { width: 80%; }
  .hero-shot-float { width: 40%; bottom: -10px; }
  .feature-grid { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 64px 1fr; gap: 12px; padding: 18px 0; }
  .news-cat { grid-column: 2; justify-self: start; }
  .news-date { border-right: 0; border-bottom: 1px solid var(--color-border); padding: 0 0 6px; text-align: left; }
  .news-date .month, .news-date .day { display: inline; margin-right: 4px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .download-btns { flex-direction: column; }
  .download-box { padding: 32px 20px; }
  .faq-answer { padding-left: 24px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .btn-lg { height: 52px; padding: 0 28px; }
  .hero-sub { font-size: 0.95rem; }
  .slide-info { flex-direction: column; align-items: flex-start; padding: 14px 16px; }
  .slide-info p { margin-left: 0; }
}

/* roulang page: category1 */
:root {
  --brand: #4A7FB5;
  --brand-dark: #2B4D7E;
  --accent: #E8A33D;
  --accent-dark: #D48F2E;
  --accent-deep: #8E5A00;
  --bg-body: #F4F7FA;
  --bg-card: #FFFFFF;
  --text-main: #1C2B39;
  --text-sub: #5B6B7B;
  --text-muted: #8A97A5;
  --border: #E3EAF0;
  --success: #2E8B6D;
  --warn: #C0422B;
  --info: #3B6FA0;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 4px rgba(27, 55, 82, 0.06), 0 12px 24px rgba(27, 55, 82, 0.07);
  --shadow-card-hover: 0 4px 8px rgba(27, 55, 82, 0.08), 0 20px 40px rgba(27, 55, 82, 0.12);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol,
dl,
dd,
p,
h1,
h2,
h3,
h4 {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3 {
  line-height: 1.3;
  color: var(--text-main);
}

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

.section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-title {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-sub);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  line-height: 1;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-main);
}

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

.btn-primary:active {
  transform: scale(0.97);
}

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

.btn-secondary:hover {
  background: rgba(74, 127, 181, 0.08);
  border-color: var(--brand-dark);
  color: var(--brand-dark);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.btn-accent {
  background: var(--accent);
  color: var(--text-main);
}

.btn-accent:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(232, 163, 61, 0.3);
}

.btn-accent:active {
  transform: scale(0.97);
}

.btn-lg {
  height: 54px;
  padding: 0 36px;
  font-size: 1rem;
}

.btn-icon {
  font-size: 1.15rem;
}

.btn-downloading {
  background: var(--success);
  color: #fff;
  pointer-events: none;
  opacity: 0.9;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 16px;
}

.nav-wrap {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 20px rgba(27, 55, 82, 0.1);
  padding: 10px 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--text-main);
  white-space: nowrap;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

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

.nav-links a {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  background: rgba(74, 127, 181, 0.12);
  color: var(--brand);
}

.nav-links a.active {
  background: var(--brand);
  color: #fff;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 12px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ===== Hero ===== */
.hero {
  padding: 150px 0 70px;
  background: #fff;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(232, 163, 61, 0.12);
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 18px 0 16px;
}

.hero-sub {
  font-size: 1.06rem;
  color: var(--text-sub);
  max-width: 34em;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.hero-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
  min-height: 340px;
}

.hero-visual-bg {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background-color: rgba(74, 127, 181, 0.06);
  background-size: cover;
  background-position: center;
  opacity: 0.16;
}

.hero-visual::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 30px solid rgba(74, 127, 181, 0.06);
  top: -30px;
  right: -20px;
  z-index: 0;
  pointer-events: none;
}

.hero-img {
  position: relative;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}

.hero-img-primary {
  width: 78%;
  z-index: 2;
}

.hero-img-secondary {
  width: 52%;
  margin: -64px 0 0 auto;
  z-index: 3;
}

/* ===== Download Bar ===== */
.download-bar {
  background: var(--bg-body);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}

.download-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.download-version {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(74, 127, 181, 0.1);
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.download-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-desc {
  font-size: 0.95rem;
  color: var(--text-sub);
}

/* ===== Features ===== */
.features-section {
  background: #fff;
}

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

.feature-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: #EDF3F9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-text h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.feature-text p {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===== Process ===== */
.process-section {
  background: var(--bg-body);
}

.process-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.process-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

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

.process-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  width: 60px;
  flex-shrink: 0;
  padding-top: 2px;
}

.process-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.process-content p {
  color: var(--text-sub);
  max-width: 46em;
}

/* ===== System Requirements ===== */
.sysreq-section {
  background: #fff;
}

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

.sysreq-card {
  position: relative;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.sysreq-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand);
  background: rgba(74, 127, 181, 0.1);
  margin-bottom: 20px;
}

.sysreq-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.sysreq-card dl {
  display: grid;
  gap: 14px;
}

.sysreq-card dt {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.sysreq-card dd {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  border: 0;
  background: transparent;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  gap: 16px;
  transition: color 0.2s ease;
}

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

.faq-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(232, 163, 61, 0.12);
  color: var(--accent-deep);
  font-size: 1.1rem;
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 360px;
  padding-bottom: 20px;
}

.faq-answer p {
  color: var(--text-sub);
  font-size: 0.94rem;
}

/* ===== CTA ===== */
.cta-section {
  background: #EFF4F9;
  border-top: 1px solid var(--border);
  text-align: center;
  padding: clamp(3.5rem, 6vw, 5rem) 0;
}

.cta-label {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(232, 163, 61, 0.14);
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.cta-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.cta-desc {
  color: var(--text-sub);
  max-width: 36em;
  margin: 0 auto 28px;
}

.cta-meta {
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.site-footer {
  background: #122A3E;
  color: #C6D4E0;
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .logo {
  color: #fff;
}

.footer-brand p {
  color: #8FA5B5;
  font-size: 0.88rem;
  margin-top: 14px;
  max-width: 26em;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: #C6D4E0;
  font-size: 0.88rem;
  padding: 5px 0;
  transition: color 0.2s ease;
}

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

.footer-col li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #C6D4E0;
  padding: 5px 0;
}

.footer-col li svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
  color: #7E94A5;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    max-width: 560px;
  }

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

@media (max-width: 768px) {
  .site-header {
    top: 10px;
  }

  .nav-wrap {
    border-radius: 16px;
    flex-wrap: wrap;
    padding: 8px 12px;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 10px 4px 4px;
    gap: 4px;
    margin-left: 0;
  }

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

  .nav-links a {
    height: 44px;
    justify-content: center;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding-top: 130px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

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

  .download-bar-inner {
    flex-direction: column;
    text-align: center;
  }

  .process-item {
    flex-direction: column;
    gap: 12px;
  }

  .process-num {
    width: auto;
  }

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

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-visual {
    min-height: 240px;
  }

  .hero-img-primary {
    width: 86%;
  }

  .hero-img-secondary {
    width: 60%;
    margin-top: -40px;
  }

  .process-item,
  .sysreq-card,
  .feature-card {
    padding: 20px;
  }

  .faq-question {
    padding: 16px;
    font-size: 0.94rem;
  }

  .faq-answer {
    padding: 0 16px;
  }

  .faq-item.active .faq-answer {
    padding-bottom: 16px;
  }

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

/* roulang page: article */
:root {
  --primary: #4A7FB5;
  --primary-dark: #2B4D7E;
  --accent: #E8A33D;
  --accent-hover: #D48F2E;
  --bg: #F4F7FA;
  --card: #FFFFFF;
  --text: #1C2B39;
  --text-secondary: #5B6B7B;
  --text-muted: #8A97A5;
  --border: #E3EAF0;
  --success: #2E8B6D;
  --warning: #C0422B;
  --info: #3B6FA0;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-input: 12px;
  --radius-img: 12px;
  --shadow-card: 0 2px 4px rgba(27,55,82,0.06), 0 12px 24px rgba(27,55,82,0.07);
  --shadow-card-hover: 0 4px 8px rgba(27,55,82,0.08), 0 20px 40px rgba(27,55,82,0.12);
  --nav-bg: rgba(255,255,255,0.92);
  --footer-bg: #122A3E;
  --footer-text: #C6D4E0;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  padding-top: 108px;
  min-width: 320px;
}

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

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

button {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: rgba(74, 127, 181, 0.18);
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-thumb {
  background: #C7D3DF;
  border-radius: 8px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.15s, border-color 0.2s;
}

.btn:active {
  transform: scale(0.97);
}

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

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

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.btn-outline:hover {
  background: rgba(74, 127, 181, 0.08);
  border-color: var(--primary-dark);
}

.btn-lg {
  height: 54px;
  padding: 0 36px;
  font-size: 1rem;
}

/* ========= Header / Nav ========= */
.site-header {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
}

.nav-wrap {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--nav-bg);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(27, 55, 82, 0.10);
  height: 64px;
  padding: 0 12px 0 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--text);
  white-space: nowrap;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-dark);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover {
  background: rgba(74, 127, 181, 0.18);
  color: var(--primary);
}

.nav-links a.active {
  background: rgba(74, 127, 181, 0.12);
  color: var(--primary);
  font-weight: 600;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}

.nav-cta:hover {
  background: var(--accent-hover);
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  margin-left: auto;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

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

/* ========= Breadcrumb ========= */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 28px 0 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.breadcrumb .sep {
  color: #BFCDD9;
}

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

/* ========= Article Hero ========= */
.article-hero {
  margin: 16px 0 8px;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.article-hero img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  display: block;
}

/* ========= Article Head ========= */
.article-head {
  padding: 28px 0 32px;
}

.article-head h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.meta-divider {
  color: #C9D5E0;
}

.article-category {
  display: inline-block;
  background: rgba(74, 127, 181, 0.10);
  color: var(--primary);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ========= Article Body ========= */
.article-body {
  padding: 8px 0 40px;
  font-size: 1rem;
  line-height: 1.85;
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body h2 {
  font-size: 1.5rem;
  line-height: 1.4;
  margin: 2em 0 0.8em;
  padding-top: 0.8em;
  border-top: 1px solid var(--border);
}

.article-body h3 {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 1.6em 0 0.6em;
}

.article-body h4 {
  font-size: 1.05rem;
  margin: 1.4em 0 0.4em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5em 1.6em;
}

.article-body ul li,
.article-body ol li {
  margin-bottom: 0.4em;
}

.article-body img {
  max-width: 100%;
  border-radius: var(--radius-img);
  margin: 1.5em auto;
  display: block;
}

.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: #F0F6FC;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 1.5em 0;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  font-size: 0.9rem;
  background: #EEF2F6;
  padding: 2px 8px;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.article-body pre {
  background: #1C2B39;
  color: #E8EDF2;
  padding: 16px 20px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.article-body pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.92rem;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-body figure {
  margin: 1.5em 0;
}

.article-body figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

/* ========= Not Found ========= */
.not-found {
  padding: 60px 24px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  background: #FAFCFE;
  margin-bottom: 40px;
}

.not-found p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ========= Back Row ========= */
.back-row {
  display: flex;
  justify-content: flex-start;
  padding: 0 0 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

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

/* ========= Article Footer ========= */
.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 32px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.article-tags {
  display: flex;
  gap: 8px;
}

.article-tags .tag {
  background: #EEF2F6;
  color: var(--text-secondary);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
}

.share-placeholder {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ========= Related ========= */
.related-wrap {
  background: var(--card);
  padding: 64px 0;
}

.related-head {
  text-align: center;
  margin-bottom: 24px;
}

.related-head h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
}

.related-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border-radius: var(--radius-card);
  padding: 56px 24px;
  text-align: center;
}

.related-empty svg {
  width: 40px;
  height: 40px;
  stroke: var(--text-muted);
  margin-bottom: 12px;
}

.related-empty p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ========= CTA Block ========= */
.cta-block {
  background: var(--primary-dark);
  padding: 80px 24px;
  text-align: center;
}

.cta-inner {
  max-width: 680px;
  margin: 0 auto;
}

.cta-label {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}

.cta-block h2 {
  color: #fff;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 12px;
}

.cta-desc {
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 28px;
  font-size: 1rem;
}

/* ========= Footer ========= */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand .logo .logo-icon {
  background: var(--primary);
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.58);
  max-width: 260px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--footer-text);
  margin-bottom: 10px;
  transition: color 0.2s;
}

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

.footer-contact ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  margin-bottom: 10px;
  color: var(--footer-text);
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 0;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ========= Responsive ========= */
@media (max-width: 1024px) {
  .container {
    max-width: 960px;
  }

  .nav-wrap {
    gap: 16px;
  }

  .nav-links a {
    padding: 8px 14px;
    font-size: 0.86rem;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 96px;
  }

  .site-header {
    top: 12px;
    padding: 0 16px;
  }

  .nav-wrap {
    height: 60px;
    border-radius: 999px;
    padding: 0 12px 0 16px;
    gap: 8px;
  }

  .logo {
    font-size: 1rem;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 84px;
    left: 16px;
    right: 16px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-card-hover);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    margin-left: 0;
    max-height: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height 0.25s ease, visibility 0.25s;
  }

  .nav-links.open {
    max-height: 320px;
    visibility: visible;
  }

  .nav-links a {
    display: block;
    padding: 0 16px;
    line-height: 48px;
    border-radius: 12px;
  }

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

  .cta-block {
    padding: 64px 16px;
  }
}

@media (max-width: 520px) {
  body {
    padding-top: 92px;
  }

  .container {
    padding: 0 16px;
  }

  .article-container {
    padding: 0 16px;
  }

  .article-head h1 {
    font-size: 1.65rem;
  }

  .article-body {
    font-size: 0.96rem;
  }

  .article-hero img {
    aspect-ratio: 16 / 9;
  }

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

  .related-wrap {
    padding: 48px 0;
  }
}

/* roulang page: category2 */
:root {
  --primary: #4A7FB5;
  --primary-dark: #2B4D7E;
  --accent: #E8A33D;
  --accent-hover: #D48F2E;
  --bg: #F4F7FA;
  --card-bg: #FFFFFF;
  --text: #1C2B39;
  --text-secondary: #5B6B7B;
  --text-muted: #8A97A5;
  --border: #E3EAF0;
  --success: #2E8B6D;
  --warning: #C0422B;
  --info: #3B6FA0;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-input: 12px;
  --shadow-card: 0 2px 4px rgba(27, 55, 82, 0.06), 0 12px 24px rgba(27, 55, 82, 0.07);
  --shadow-hover: 0 4px 8px rgba(27, 55, 82, 0.08), 0 20px 40px rgba(27, 55, 82, 0.12);
  --transition: all 0.25s ease;
  --section-space: clamp(3rem, 6vw, 5rem);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
  border-radius: 12px;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--section-space) 0;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}
.nav-wrap {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(27, 55, 82, 0.10);
  padding: 8px 14px 8px 18px;
  max-width: 1080px;
  width: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--primary-dark);
  color: #fff;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.nav-links a:hover {
  background: rgba(74, 127, 181, 0.12);
  color: var(--primary-dark);
}
.nav-links a.active {
  background: rgba(74, 127, 181, 0.10);
  color: var(--primary-dark);
  font-weight: 600;
}
.nav-cta {
  background: var(--accent);
  color: var(--text);
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-cta:hover {
  background: var(--accent-hover);
  color: #fff;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 30px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--text);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: rgba(74, 127, 181, 0.08);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}
.btn:active {
  transform: scale(0.97);
}
.btn .btn-icon {
  font-size: 1.1rem;
  line-height: 1;
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.65);
  color: #fff;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}
.btn-accent {
  background: var(--accent);
  color: var(--text);
  height: 54px;
  padding: 0 40px;
  font-size: 1rem;
}
.btn-accent:hover {
  background: var(--accent-hover);
  color: #fff;
}

/* ---------- Hero ---------- */
.page-hero {
  position: relative;
  padding: 170px 0 90px;
  background: var(--bg);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: 90px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(74, 127, 181, 0.07);
}
.page-hero::after {
  content: "";
  position: absolute;
  bottom: 30px;
  left: -50px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(232, 163, 61, 0.08);
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(74, 127, 181, 0.10);
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 18px;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 32em;
  margin-bottom: 32px;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-meta span::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
}
.hero-visual {
  position: relative;
  min-height: 320px;
}
.hero-bg {
  position: absolute;
  inset: 4% 2% 8% 6%;
  background-size: cover;
  background-position: center;
  border-radius: 24px;
  z-index: 0;
  box-shadow: var(--shadow-card);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(27, 55, 82, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  z-index: 1;
  pointer-events: none;
}
.hero-img-main {
  position: absolute;
  top: 0;
  left: 0;
  width: 68%;
  z-index: 2;
  border-radius: 16px;
  box-shadow: var(--shadow-hover);
  border: 4px solid #fff;
}
.hero-img-sub {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 52%;
  z-index: 3;
  border-radius: 16px;
  box-shadow: var(--shadow-hover);
  border: 4px solid #fff;
}

/* ---------- Section Head ---------- */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--primary);
  background: rgba(74, 127, 181, 0.08);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 14px;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- Feature Overview 2x2 ---------- */
.feature-overview {
  background: var(--card-bg);
}
.feature-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  background: var(--card-bg);
}
.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #EDF3F9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
}
.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.feature-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---------- Feature Detail ---------- */
.feature-detail {
  background: var(--bg);
}
.detail-block {
  display: grid;
  grid-template-columns: 72px 1fr 220px;
  gap: 28px;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px;
  margin-bottom: 32px;
  transition: var(--transition);
}
.detail-block:hover {
  box-shadow: var(--shadow-card);
}
.detail-block:last-child {
  margin-bottom: 0;
}
.detail-num {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.detail-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}
.detail-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 44em;
}
.detail-image img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.detail-quote {
  margin-top: 14px;
  background: #F0F6FC;
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Scenario ---------- */
.scenario-section {
  background: var(--card-bg);
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.scenario-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.6;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.scenario-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: #EDF3F9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  margin-bottom: 18px;
}
.scenario-icon svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.scenario-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}
.scenario-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Stats ---------- */
.stats-section {
  background: var(--primary-dark);
  padding: 64px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item h3 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}
.stat-item p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.02em;
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open {
  box-shadow: var(--shadow-card);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  background: none;
  border: none;
  padding: 20px 22px;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}
.faq-question:hover {
  color: var(--primary-dark);
}
.faq-q-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(232, 163, 61, 0.12);
  color: var(--accent-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}
.faq-toggle {
  margin-left: auto;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  transition: transform 0.25s ease;
}
.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--primary);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.faq-answer-inner {
  padding: 0 22px 22px 64px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- CTA ---------- */
.cta-section {
  background: var(--card-bg);
  padding: 80px 0;
}
.cta-box {
  text-align: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 64px 32px;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(74, 127, 181, 0.08);
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(232, 163, 61, 0.10);
}
.cta-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-hover);
  text-transform: uppercase;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.cta-box h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}
.cta-box p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 36em;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}
.cta-btns {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
  z-index: 1;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #122A3E;
  color: #C6D4E0;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .logo .logo-icon {
  background: var(--accent);
  color: var(--text);
}
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: #93A7B8;
  max-width: 22em;
  margin-top: 10px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: #93A7B8;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-col ul li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: #93A7B8;
  padding: 5px 0;
}
.footer-col ul li svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  color: var(--accent);
}
.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  text-align: center;
  font-size: 0.8rem;
  color: #7A8FA3;
}

/* ---------- Responsive ---------- */
@media (min-width: 1440px) {
  .container {
    max-width: 1280px;
  }
}
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .hero-visual {
    min-height: 280px;
  }
  .detail-block {
    grid-template-columns: 60px 1fr 180px;
    padding: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  .nav-wrap {
    border-radius: 24px;
    padding: 8px 10px 8px 14px;
  }
  .nav-cta {
    padding: 8px 14px;
    font-size: 0.82rem;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 12px 32px rgba(27, 55, 82, 0.14);
    padding: 12px;
    gap: 4px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 12px 18px;
    border-radius: 12px;
    font-size: 0.95rem;
  }
  .page-hero {
    padding: 130px 0 60px;
  }
  .hero-btns .btn {
    height: 44px;
    padding: 0 22px;
    font-size: 0.88rem;
  }
  .feature-grid-2x2 {
    grid-template-columns: 1fr;
  }
  .detail-block {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .detail-num {
    text-align: left;
  }
  .detail-image img {
    height: 110px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 16px;
  }
  .faq-answer-inner {
    padding-left: 22px;
  }
  .cta-box {
    padding: 44px 20px;
  }
  .cta-btns .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .logo {
    font-size: 0.95rem;
  }
  .logo-icon {
    width: 30px;
    height: 30px;
  }
  .nav-cta {
    display: none;
  }
  .nav-wrap {
    justify-content: space-between;
  }
  .page-hero h1 {
    font-size: 1.6rem;
  }
  .hero-sub {
    font-size: 0.95rem;
  }
  .feature-card {
    padding: 20px;
    flex-direction: column;
  }
  .detail-block {
    padding: 20px;
  }
  .cta-box h2 {
    font-size: 1.3rem;
  }
}