/* roulang page: index */
:root {
  --color-primary: #1C7DD6;
  --color-primary-dark: #1565B7;
  --color-primary-soft: #E8F2FC;
  --color-accent: #21B8BD;
  --color-accent-soft: #E5F7F7;
  --color-cta: #FF7843;
  --color-cta-hover: #F56A32;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #1A2E45;
  --color-text-secondary: #52677D;
  --color-border: #E2E9F2;
  --color-success: #2FBF71;
  --color-warning: #F5A623;
  --color-error: #E5484D;
  --shadow-sm: 0 1px 4px rgba(26,46,69,0.06);
  --shadow-md: 0 4px 16px rgba(26,46,69,0.08);
  --shadow-lg: 0 8px 30px rgba(26,46,69,0.10);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --font-sans: system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max: 1200px;
  --space-section: clamp(56px, 6vw, 96px);
  --space-inner: 24px;
  --header-height: 72px;
  --transition-base: all 0.2s ease-out;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition-base); }
a:hover { color: var(--color-primary-dark); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
ul, ol { list-style: none; }
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}
.section-padding { padding: var(--space-section) 0; }
.text-center { text-align: center; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}
.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  display: inline-block;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 8px;
  transition: var(--transition-base);
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 600;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 220px;
  height: 40px;
  padding: 0 12px;
  background: #F1F4F8;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: var(--transition-base);
}
.search-box:hover, .search-box:focus-within {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(28,125,214,0.12);
}
.search-box svg { flex-shrink: 0; }
.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--color-text);
  outline: none;
  min-width: 0;
}
.search-box input::placeholder { color: var(--color-text-secondary); }
.kbd {
  font-size: 11px;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
  white-space: nowrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition-base);
  white-space: nowrap;
}
.btn:active { transform: translateY(0) scale(0.98); }
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); }
.btn-cta { background: var(--color-cta); color: #fff; }
.btn-cta:hover { background: var(--color-cta-hover); color: #fff; transform: scale(1.02); }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }
.btn-sm { height: 34px; padding: 0 14px; font-size: 13px; }
.btn-lg { height: 48px; padding: 0 28px; font-size: 15px; }
.btn-block { width: 100%; }
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: var(--transition-base);
}
.hamburger:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: var(--color-surface);
  z-index: 1100;
  box-shadow: var(--shadow-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: right 0.3s ease-out;
}
.mobile-menu.open { right: 0; }
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.mobile-menu-close {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.mobile-menu-close:hover { background: var(--color-bg); }
.mobile-menu a {
  display: block;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 10px;
  transition: var(--transition-base);
}
.mobile-menu a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu a.active { background: var(--color-primary-soft); color: var(--color-primary); font-weight: 600; }
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}
.menu-overlay.show { opacity: 1; visibility: visible; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background:
    linear-gradient(135deg, rgba(232,242,252,0.72) 0%, rgba(245,248,252,0.2) 40%, rgba(255,255,255,0.1) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-content { max-width: 560px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid rgba(28,125,214,0.3);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(255,255,255,0.8);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--color-text);
}
.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
}
.trust-item svg { color: var(--color-primary); flex-shrink: 0; }
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.phone-mock {
  width: 240px;
  height: 480px;
  background: var(--color-surface);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  position: relative;
}
.phone-mock img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.phone-mock::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: rgba(0,0,0,0.12);
  border-radius: var(--radius-pill);
}
.float-card {
  position: absolute;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 12px 14px;
  z-index: 3;
}
.float-card-rating {
  top: 60px;
  left: -20px;
  width: 120px;
}
.rating-score { display: flex; align-items: center; gap: 8px; }
.rating-score .score { font-size: 22px; font-weight: 700; color: var(--color-text); font-variant-numeric: tabular-nums; }
.rating-stars { color: var(--color-warning); font-size: 13px; letter-spacing: 1px; }
.rating-label { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; }
.float-card-download {
  bottom: 70px;
  right: -15px;
  width: 180px;
}
.download-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.download-header span { font-size: 12px; font-weight: 600; color: var(--color-text); }
.download-header em { font-style: normal; font-size: 11px; color: var(--color-accent); font-weight: 600; }
.progress-track { height: 6px; background: var(--color-bg); border-radius: var(--radius-pill); overflow: hidden; }
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-pill);
  width: 85%;
}
.download-meta { display: flex; justify-content: space-between; margin-top: 6px; font-size: 11px; color: var(--color-text-secondary); }

/* ===== Stats bar ===== */
.stats-section { padding: 32px 0; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
}
.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}
.stat-value {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 13px; color: var(--color-text-secondary); }

/* ===== Features ===== */
.features-section { background: var(--color-bg); }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-header .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-header p { color: var(--color-text-secondary); font-size: 15px; line-height: 1.8; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}
.feature-card:nth-child(1) { background: linear-gradient(180deg, var(--color-primary-soft) 0%, var(--color-surface) 40%); }
.feature-card:nth-child(2) { background: linear-gradient(180deg, var(--color-accent-soft) 0%, var(--color-surface) 40%); }
.feature-card:nth-child(3) { background: linear-gradient(180deg, #F0F4F8 0%, var(--color-surface) 40%); }
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  color: var(--color-primary);
}
.feature-card:nth-child(2) .feature-icon { color: var(--color-accent); }
.feature-card h3 { font-size: 16px; font-weight: 600; }
.feature-card p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; flex: 1; }
.feature-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.feature-link:hover { color: var(--color-primary-dark); }

/* ===== Steps ===== */
.steps-section { background: var(--color-surface); }
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 960px;
  margin: 0 auto;
}
.step-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.step-row:nth-child(even) .step-text { order: 2; }
.step-row:nth-child(even) .step-visual { order: 1; }
.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.step-text h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.step-text p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.8; max-width: 400px; }
.step-visual {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 16/10;
}
.step-visual img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Testimonials ===== */
.testimonials-section { background: var(--color-bg); }
.testimonials-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}
.testimonial-main {
  background: var(--color-primary-soft);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.testimonial-main blockquote {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text);
  font-weight: 500;
}
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.testimonial-author .name { font-size: 14px; font-weight: 600; }
.testimonial-author .from { font-size: 12px; color: var(--color-text-secondary); }
.testimonial-grid-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.testimonial-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.testimonial-item blockquote { font-size: 14px; line-height: 1.8; color: var(--color-text); margin-bottom: 12px; }

/* ===== News / CMS ===== */
.news-section { background: var(--color-surface); }
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  border: 1px solid transparent;
}
.news-card:hover {
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border);
  transform: translateY(-2px);
}
.news-thumb {
  width: 120px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-border);
}
.news-body { flex: 1; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.news-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.news-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-text);
  transition: var(--transition-base);
}
.news-title:hover { color: var(--color-primary); }
.news-summary {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}
.news-empty {
  text-align: center;
  padding: 48px 24px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
}
.news-empty svg { margin-bottom: 12px; }
.news-empty p { color: var(--color-text-secondary); font-size: 14px; margin-bottom: 16px; }

/* ===== FAQ ===== */
.faq-section { background: var(--color-bg); }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition-base);
}
.faq-item.open { background: var(--color-primary-soft); box-shadow: var(--shadow-md); }
.faq-question {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  width: 100%;
  text-align: left;
}
.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease-out;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--color-primary); color: #fff; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}
.faq-answer-inner {
  padding: 0 20px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* ===== CTA ===== */
.cta-section {
  background: var(--color-primary);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}
.cta-content p {
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 28px;
}
.cta-content .btn-cta { background: #fff; color: var(--color-primary); }
.cta-content .btn-cta:hover { background: rgba(255,255,255,0.9); color: var(--color-primary-dark); transform: scale(1.02); }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer-brand .brand-text { font-size: 16px; }
.footer-brand p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 12px;
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: var(--transition-base);
}
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p { font-size: 13px; color: var(--color-text-secondary); }
.social-links { display: flex; gap: 8px; }
.social-links a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: var(--transition-base);
}
.social-links a:hover { background: var(--color-primary); color: #fff; }

/* ===== Bottom bar ===== */
.bottom-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 60px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  z-index: 900;
  display: none;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 24px;
  transition: transform 0.3s ease-out;
}
.bottom-bar.hidden { transform: translateY(100%); }
.bottom-bar-text { font-size: 13px; font-weight: 500; color: var(--color-text); }
.bottom-bar-text span { color: var(--color-accent); font-weight: 600; }
.bottom-bar-close {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
}
.bottom-bar-close:hover { background: var(--color-bg); color: var(--color-text); }

/* ===== Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-up { opacity: 1; transform: none; }
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-links { display: none; }
  .search-box { width: 180px; }
  .hamburger { display: flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; min-height: 400px; }
  .step-row { grid-template-columns: 1fr; gap: 24px; }
  .step-row:nth-child(even) .step-text { order: 0; }
  .step-row:nth-child(even) .step-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .nav-right .btn { padding: 0 14px; font-size: 13px; }
  .nav-right .search-box { width: 40px; padding: 0; justify-content: center; }
  .nav-right .search-box input, .nav-right .search-box .kbd { display: none; }
  .hero { padding: 100px 0 60px; }
  .hero h1 { font-size: clamp(1.75rem, 6vw, 2.25rem); }
  .hero-sub { font-size: 15px; }
  .hero-actions .btn { flex: 1; }
  .hero-trust { gap: 12px; }
  .trust-item { font-size: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-item { padding: 12px; gap: 8px; }
  .stat-value { font-size: 18px; }
  .stat-label { font-size: 12px; }
  .features-grid { grid-template-columns: 1fr; }
  .testimonial-grid-side { grid-template-columns: 1fr; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 120px; }
  .faq-item { border-radius: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: center; text-align: center; }
  .bottom-bar { padding: 0 48px; }
  .bottom-bar-text { font-size: 12px; }
}
@media (max-width: 420px) {
  .nav-right .btn { display: none; }
  .stats-grid { grid-template-columns: 1fr; }
  .bottom-bar-text { display: none; }
  .bottom-bar { height: 52px; }
}

/* roulang page: category1 */
:root {
      --color-primary: #1C7DD6;
      --color-primary-dark: #1565B0;
      --color-primary-soft: #E8F2FC;
      --color-accent: #21B8BD;
      --color-accent-dark: #179A9F;
      --color-cta: #FF7843;
      --color-cta-dark: #F06432;
      --color-bg: #F7F9FC;
      --color-surface: #FFFFFF;
      --color-text: #1A2E45;
      --color-text-secondary: #52677D;
      --color-border: #E2E9F2;
      --color-success: #2FBF71;
      --color-warning: #F5A623;
      --color-error: #E5484D;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 10px;
      --radius-pill: 999px;
      --shadow-sm: 0 1px 4px rgba(26,46,69,0.06);
      --shadow-md: 0 4px 16px rgba(26,46,69,0.08);
      --shadow-lg: 0 8px 30px rgba(26,46,69,0.10);
      --container: 1200px;
      --space-section: clamp(56px, 6vw, 96px);
      --header-h: 72px;
      --transition: all 0.2s ease-out;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

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

    button {
      font-family: inherit;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }

    input {
      font-family: inherit;
    }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding-left: clamp(16px, 4vw, 32px);
      padding-right: clamp(16px, 4vw, 32px);
    }

    /* ---------- Buttons ---------- */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 24px;
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      font-weight: 500;
      letter-spacing: 0.01em;
      transition: var(--transition);
      white-space: nowrap;
    }

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

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

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

    .btn-cta:hover {
      background: var(--color-cta-dark);
      color: #fff;
      transform: scale(1.02);
    }

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

    .btn-outline:hover {
      border-color: var(--color-primary);
      color: var(--color-primary-dark);
      transform: translateY(-1px);
    }

    .btn:active,
    .btn-cta:active {
      transform: translateY(0) scale(0.98);
    }

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

    /* ---------- Badge ---------- */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      font-size: 0.75rem;
      font-weight: 500;
      background: var(--color-primary-soft);
      color: var(--color-primary);
    }

    .badge-tag {
      background: rgba(33,184,189,0.12);
      color: var(--color-accent-dark);
    }

    /* ---------- Header ---------- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: var(--header-h);
      background: rgba(255,255,255,0.90);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
    }

    .header-inner {
      height: var(--header-h);
      display: flex;
      align-items: center;
      gap: 32px;
    }

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

    .brand-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--color-primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(28,125,214,0.25);
    }

    .brand-text {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--color-text);
      letter-spacing: -0.01em;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-left: 8px;
      flex: 1;
    }

    .nav-links a {
      padding: 10px 14px;
      border-radius: 8px;
      font-size: 0.9375rem;
      color: var(--color-text-secondary);
      font-weight: 500;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: var(--color-primary-soft);
      color: var(--color-primary);
    }

    .nav-links a.active {
      background: var(--color-primary-soft);
      color: var(--color-primary);
      font-weight: 600;
    }

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

    .search-trigger {
      display: flex;
      align-items: center;
      gap: 8px;
      width: 220px;
      height: 40px;
      padding: 0 12px;
      border-radius: var(--radius-pill);
      background: #F1F4F8;
      border: 1px solid transparent;
      color: var(--color-text-secondary);
      font-size: 0.875rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .search-trigger:hover {
      border-color: var(--color-border);
      background: #EDF1F6;
    }

    .search-trigger .kbd {
      margin-left: auto;
      font-size: 0.6875rem;
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-text-secondary);
      font-family: inherit;
    }

    .header-cta {
      height: 40px;
      padding: 0 20px;
      font-size: 0.875rem;
      border-radius: var(--radius-sm);
    }

    .help-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      transition: var(--transition);
    }

    .help-icon:hover {
      background: var(--color-primary);
      color: #fff;
    }

    .hamburger {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      align-items: center;
      justify-content: center;
    }

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

    /* Mobile drawer */
    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.6);
      backdrop-filter: blur(4px);
      z-index: 120;
      opacity: 0;
      visibility: hidden;
      transition: var(--transition);
    }

    .drawer-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .drawer {
      position: fixed;
      top: 0;
      right: -320px;
      width: 300px;
      height: 100dvh;
      background: var(--color-surface);
      z-index: 130;
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 20px;
      transition: right 0.3s ease-out;
      box-shadow: var(--shadow-lg);
    }

    .drawer.open {
      right: 0;
    }

    .drawer .drawer-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .drawer-close {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--color-bg);
      color: var(--color-text-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .drawer-close:hover {
      background: var(--color-error);
      color: #fff;
    }

    .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .drawer-nav a {
      padding: 14px 16px;
      border-radius: 10px;
      font-size: 1rem;
      font-weight: 500;
      color: var(--color-text-secondary);
      background: var(--color-bg);
    }

    .drawer-nav a.active {
      background: var(--color-primary-soft);
      color: var(--color-primary);
      font-weight: 600;
    }

    .drawer .search-trigger {
      width: 100%;
    }

    .drawer .btn {
      width: 100%;
    }

    /* Search modal */
    .search-modal {
      position: fixed;
      inset: 0;
      z-index: 140;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 120px 16px 40px;
      background: rgba(20,32,48,0.55);
      backdrop-filter: blur(4px);
      opacity: 0;
      visibility: hidden;
      transition: var(--transition);
    }

    .search-modal.open {
      opacity: 1;
      visibility: visible;
    }

    .search-panel {
      width: 100%;
      max-width: 640px;
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      padding: 24px;
      transform: translateY(-8px);
      transition: transform 0.25s ease-out;
    }

    .search-modal.open .search-panel {
      transform: translateY(0);
    }

    .search-panel-input {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
      padding: 0 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border);
      background: var(--color-bg);
      font-size: 0.9375rem;
      color: var(--color-text);
    }

    .search-panel-input:focus-within {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px rgba(28,125,214,0.15);
    }

    .search-panel-input input {
      flex: 1;
      border: none;
      background: transparent;
      outline: none;
      font-size: 1rem;
      color: var(--color-text);
    }

    .search-hint {
      margin-top: 16px;
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
    }

    .search-hot {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .search-hot span {
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      background: var(--color-primary-soft);
      color: var(--color-primary);
      font-size: 0.8125rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .search-hot span:hover {
      background: var(--color-primary);
      color: #fff;
    }

    /* ---------- Page Hero ---------- */
    .page-hero {
      position: relative;
      padding-top: calc(var(--header-h) + clamp(48px, 6vw, 80px));
      padding-bottom: clamp(48px, 5vw, 72px);
      background: linear-gradient(135deg, rgba(232,242,252,0.92) 0%, rgba(247,249,252,0.88) 50%, rgba(255,255,255,0.82) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--color-border);
      overflow: hidden;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: linear-gradient(rgba(26,46,69,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(26,46,69,0.025) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 860px;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--color-primary);
      background: rgba(255,255,255,0.7);
      color: var(--color-primary);
      font-size: 0.8125rem;
      font-weight: 500;
      margin-bottom: 20px;
    }

    .hero-content h1 {
      font-size: clamp(2rem, 4vw, 3.25rem);
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--color-text);
    }

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

    .hero-content .hero-sub {
      font-size: 1.0625rem;
      line-height: 1.8;
      color: var(--color-text-secondary);
      max-width: 640px;
      margin-bottom: 28px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 32px;
    }

    .hero-actions .btn {
      min-width: 140px;
    }

    .trust-row {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
    }

    .trust-item svg {
      color: var(--color-primary);
    }

    /* ---------- Section base ---------- */
    .section {
      padding-top: var(--space-section);
      padding-bottom: var(--space-section);
    }

    .section-alt {
      background: var(--color-bg);
    }

    .section-white {
      background: var(--color-surface);
    }

    .section-soft {
      background: var(--color-primary-soft);
    }

    .section-head {
      max-width: 680px;
      margin-bottom: 40px;
    }

    .section-head .section-eyebrow {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--color-primary);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 8px;
    }

    .section-head h2 {
      font-size: clamp(1.5rem, 2.5vw, 2rem);
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.01em;
      margin-bottom: 12px;
    }

    .section-head p {
      color: var(--color-text-secondary);
      font-size: 1rem;
      line-height: 1.8;
    }

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

    /* ---------- Stats ---------- */
    .stats-band {
      position: relative;
      z-index: 3;
      margin-top: -4px;
      padding-top: 32px;
      padding-bottom: 8px;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .stat-card {
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      gap: 14px;
      transition: var(--transition);
    }

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

    .stat-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .stat-num {
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--color-text);
      line-height: 1.2;
      font-variant-numeric: tabular-nums;
    }

    .stat-label {
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
      margin-top: 2px;
    }

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

    .version-card {
      position: relative;
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

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

    .version-card .card-thumb {
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
    }

    .version-card .card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease-out;
    }

    .version-card:hover .card-thumb img {
      transform: scale(1.03);
    }

    .version-card .thumb-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      z-index: 2;
    }

    .version-card .card-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex: 1;
      gap: 8px;
    }

    .version-card .card-title {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--color-text);
      line-height: 1.4;
    }

    .version-card .card-title a {
      color: inherit;
    }

    .version-card .card-title a:hover {
      color: var(--color-primary);
    }

    .version-card .card-excerpt {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      flex: 1;
    }

    .version-card .card-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
      border-top: 1px solid var(--color-border);
      padding-top: 14px;
      margin-top: 4px;
      font-variant-numeric: tabular-nums;
    }

    .stretched-link::after {
      content: "";
      position: absolute;
      inset: 0;
      z-index: 1;
    }

    /* ---------- Scenario ---------- */
    .scenario-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: clamp(32px, 5vw, 72px);
      align-items: center;
    }

    .scenario-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .scenario-visual img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    .scenario-visual .visual-caption {
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 16px;
      padding: 12px 16px;
      border-radius: var(--radius-md);
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(8px);
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
      box-shadow: var(--shadow-sm);
    }

    .scenario-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 8px;
    }

    .scenario-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .scenario-item .scenario-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .scenario-item h4 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .scenario-item p {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      line-height: 1.7;
    }

    /* ---------- Steps ---------- */
    .steps-wrapper {
      position: relative;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .steps-wrapper::before {
      content: "";
      position: absolute;
      top: 32px;
      left: 16%;
      right: 16%;
      border-top: 2px dashed var(--color-primary);
      opacity: 0.35;
      z-index: 0;
    }

    .step-item {
      position: relative;
      z-index: 1;
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .step-item:hover {
      border-color: var(--color-border);
      box-shadow: var(--shadow-md);
    }

    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--color-primary);
      color: #fff;
      font-size: 1.125rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 14px rgba(28,125,214,0.28);
    }

    .step-item h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      line-height: 1.7;
    }

    .step-thumb {
      margin-top: 16px;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .step-thumb img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
    }

    /* ---------- Table ---------- */
    .table-wrap {
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      overflow-x: auto;
      background: var(--color-surface);
      box-shadow: var(--shadow-sm);
    }

    .table-wrap table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      font-size: 0.9375rem;
    }

    .table-wrap th,
    .table-wrap td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--color-border);
    }

    .table-wrap th {
      background: var(--color-primary-soft);
      color: var(--color-primary);
      font-weight: 600;
      font-size: 0.8125rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .table-wrap tr:last-child td {
      border-bottom: none;
    }

    .table-wrap tr:hover td {
      background: #FAFCFF;
    }

    .table-tag {
      display: inline-block;
      padding: 2px 10px;
      border-radius: var(--radius-pill);
      font-size: 0.75rem;
      font-weight: 500;
    }

    .table-tag.current {
      background: var(--color-primary-soft);
      color: var(--color-primary);
    }

    /* ---------- FAQ ---------- */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--color-surface);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.expanded {
      background: var(--color-primary-soft);
      box-shadow: var(--shadow-md);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 56px;
      padding: 16px 20px;
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--color-text);
      cursor: pointer;
      background: transparent;
      text-align: left;
      width: 100%;
    }

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

    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: transform 0.25s ease-out;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }

    .faq-answer-inner {
      padding: 0 20px 20px;
      font-size: 0.9375rem;
      line-height: 1.8;
      color: var(--color-text-secondary);
    }

    /* ---------- CTA band ---------- */
    .cta-band {
      padding: var(--space-section) 0;
      background: var(--color-primary-soft);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .cta-band .cta-inner {
      max-width: 720px;
      margin: 0 auto;
      text-align: center;
    }

    .cta-band h2 {
      font-size: clamp(1.5rem, 2.5vw, 2rem);
      font-weight: 700;
      margin-bottom: 12px;
    }

    .cta-band p {
      color: var(--color-text-secondary);
      font-size: 1rem;
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

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

    .footer-brand p {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      line-height: 1.8;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--color-text);
    }

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

    .footer-col ul a {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
    }

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

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      border-top: 1px solid var(--color-border);
      padding: 24px 0;
      flex-wrap: wrap;
    }

    .footer-bottom p {
      font-size: 0.8125rem;
      color: var(--color-text-secondary);
    }

    .social-links {
      display: flex;
      gap: 10px;
    }

    .social-links a {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

    .social-links a:hover {
      background: var(--color-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    /* ---------- Sticky bar ---------- */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 90;
      height: 64px;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--color-border);
      display: flex;
      align-items: center;
      padding-left: clamp(16px, 4vw, 32px);
      padding-right: clamp(16px, 4vw, 32px);
      transform: translateY(0);
      transition: transform 0.3s ease-out;
    }

    .sticky-bar.hidden {
      transform: translateY(100%);
    }

    .sticky-bar .bar-text {
      font-size: 0.9375rem;
      color: var(--color-text);
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .sticky-bar .bar-text .bar-safe {
      font-size: 0.8125rem;
      color: var(--color-success);
      font-weight: 400;
    }

    .sticky-bar .bar-cta {
      margin-left: auto;
      height: 40px;
      padding: 0 24px;
      font-size: 0.875rem;
    }

    .sticky-bar .bar-close {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: transparent;
      color: var(--color-text-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-left: 8px;
      flex-shrink: 0;
    }

    .sticky-bar .bar-close:hover {
      background: var(--color-bg);
      color: var(--color-text);
    }

    /* ---------- Reveal on scroll ---------- */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
      .reveal {
        opacity: 1;
        transform: none;
      }
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 1023px) {
      .nav-links {
        display: none;
      }
      .header-cta {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .search-trigger {
        width: 44px;
        padding: 0;
        justify-content: center;
      }
      .search-trigger .kbd {
        display: none;
      }
      .search-trigger span:not(.kbd) {
        display: none;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-layout {
        grid-template-columns: 1fr;
      }
      .steps-wrapper {
        grid-template-columns: 1fr;
      }
      .steps-wrapper::before {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-brand {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 767px) {
      :root {
        --space-section: 48px;
      }
      .header-inner {
        gap: 12px;
      }
      .brand-text {
        font-size: 0.9375rem;
      }
      .brand-icon {
        width: 32px;
        height: 32px;
      }
      .header-actions {
        gap: 8px;
      }
      .help-icon {
        display: none;
      }
      .page-hero {
        padding-top: calc(var(--header-h) + 32px);
      }
      .hero-content h1 {
        font-size: clamp(1.625rem, 6vw, 2rem);
      }
      .hero-actions {
        flex-direction: column;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .trust-row {
        gap: 10px;
        row-gap: 8px;
      }
      .card-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
      }
      .stat-card {
        padding: 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
      .stat-num {
        font-size: 1.125rem;
      }
      .steps-wrapper {
        gap: 16px;
      }
      .cta-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .cta-actions .btn {
        width: 100%;
      }
      .faq-item .faq-question {
        font-size: 0.875rem;
        padding: 14px 16px;
      }
      .faq-item .faq-answer-inner {
        padding: 0 16px 16px;
      }
      .site-footer {
        padding-top: 48px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
        justify-content: center;
      }
      .sticky-bar {
        padding-bottom: env(safe-area-inset-bottom);
        height: auto;
        min-height: 64px;
        padding-top: 8px;
        padding-bottom: calc(8px + env(safe-area-inset-bottom));
      }
      .sticky-bar .bar-text {
        font-size: 0.8125rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
      }
      .sticky-bar .bar-text .bar-safe {
        font-size: 0.75rem;
      }
      .sticky-bar .bar-cta {
        height: 36px;
        padding: 0 18px;
        font-size: 0.8125rem;
      }
      .table-wrap {
        border-radius: var(--radius-md);
      }
      .table-wrap th,
      .table-wrap td {
        padding: 12px 14px;
      }
      .scenario-visual {
        order: -1;
      }
    }

    @media (max-width: 520px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stat-card {
        padding: 14px;
      }
      .stat-icon {
        width: 36px;
        height: 36px;
      }
      .stat-num {
        font-size: 1rem;
      }
      .footer-grid {
        gap: 24px;
      }
    }

/* roulang page: article */
:root {
  --color-primary: #1C7DD6;
  --color-primary-soft: #E8F2FC;
  --color-primary-deep: #1565AC;
  --color-accent: #21B8BD;
  --color-accent-soft: #E6F7F8;
  --color-cta: #FF7843;
  --color-cta-hover: #E75F2B;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #1A2E45;
  --color-text-secondary: #52677D;
  --color-text-muted: #7288A0;
  --color-border: #E2E9F2;
  --color-success: #2FBF71;
  --color-warning: #F5A623;
  --color-error: #E5484D;
  --font-sans: system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 4px rgba(26,46,69,0.06);
  --shadow-md: 0 4px 16px rgba(26,46,69,0.08);
  --shadow-lg: 0 8px 30px rgba(26,46,69,0.10);
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: clamp(56px, 6vw, 96px);
  --container-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

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

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: var(--font-sans);
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  transition: all 0.2s ease-out;
  border: 1px solid transparent;
}

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

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

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

.btn-cta {
  background: var(--color-cta);
  color: #FFFFFF;
}

.btn-cta:hover {
  background: var(--color-cta-hover);
  color: #FFFFFF;
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

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

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

.btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 0.875rem;
}

.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255,255,255,0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.2s ease-out;
}

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

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

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

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.nav-links a {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.2s ease-out;
}

.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav-links a.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

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

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 14px;
  background: #F1F4F8;
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all 0.2s ease-out;
  min-width: 200px;
}

.search-trigger:hover {
  border-color: var(--color-border);
  background: var(--color-surface);
}

.search-text {
  flex: 1;
  text-align: left;
  font-size: 0.875rem;
}

.search-kbd {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2px 6px;
  background: var(--color-surface);
}

.header-cta {
  height: 40px;
  padding: 0 20px;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  background: var(--color-primary-soft);
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all 0.25s ease-out;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: var(--color-surface);
  z-index: 1101;
  transform: translateX(100%);
  transition: transform 0.3s ease-out;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 48px;
  flex: 1;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav a {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
}

.mobile-nav a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.mobile-nav a.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

.menu-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-out;
}

.menu-mask.open {
  opacity: 1;
  visibility: visible;
}

/* 搜索面板 */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
  background: rgba(26,46,69,0.4);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease-out;
}

.search-modal.open {
  opacity: 1;
  visibility: visible;
}

.search-modal-inner {
  width: 600px;
  max-width: calc(100vw - 32px);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  transform: translateY(-12px);
  transition: transform 0.25s ease-out;
}

.search-modal.open .search-modal-inner {
  transform: translateY(0);
}

.search-modal-header {
  display: flex;
  gap: 12px;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
}

.search-modal-header input {
  flex: 1;
  height: 44px;
  padding: 0 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: all 0.2s ease-out;
}

.search-modal-header input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(28,125,214,0.15);
  background: var(--color-surface);
}

.search-modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  transition: all 0.2s ease-out;
}

.search-modal-close:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.search-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  align-items: center;
}

.hot-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-right: 4px;
}

.hot-tag {
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all 0.2s ease-out;
}

.hot-tag:hover {
  background: var(--color-primary);
  color: #FFFFFF;
}

/* 面包屑 */
.breadcrumb {
  margin-top: var(--header-height);
  padding: 16px 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb .container {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

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

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

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

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
  max-width: 60ch;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文章主区 */
.article-main {
  padding: 48px 0 var(--spacing-section);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--spacing-xl);
  align-items: start;
}

.article-main-col {
  min-width: 0;
}

.aside-col {
  min-width: 0;
}

/* 文章卡片 */
.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--color-border);
}

.article-h1 {
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.meta-cat {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.8125rem;
}

.meta-dot {
  color: var(--color-text-muted);
}

.meta-source {
  color: var(--color-text-muted);
}

/* 正文排版 */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--color-text);
  max-width: 76ch;
}

.article-body > * + * {
  margin-top: 1.5em;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin-top: 2em;
  margin-bottom: 0.6em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.8em;
  margin-bottom: 0.5em;
  color: var(--color-text);
}

.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--color-text);
}

.article-body p {
  margin-bottom: 1.5em;
  color: var(--color-text);
}

.article-body strong {
  font-weight: 600;
  color: var(--color-text);
}

.article-body em {
  font-style: italic;
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-soft);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
  font-style: normal;
  margin: 1.8em 0;
}

.article-body ul,
.article-body ol {
  margin: 1.5em 0;
  padding-left: 1.4em;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.5em;
  color: var(--color-text);
}

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 1.8em 0;
  font-size: 0.9375rem;
}

.article-body th {
  background: var(--color-primary-soft);
  font-weight: 600;
  text-align: left;
  color: var(--color-text);
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.article-body tr:last-child th,
.article-body tr:last-child td {
  border-bottom: none;
}

.article-body img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: 1.5em 0;
}

.article-body figure {
  margin: 1.8em 0;
}

.article-body figure img {
  margin: 0;
}

.article-body figcaption {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.article-body pre {
  background: #F1F4F8;
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.article-body code {
  background: var(--color-primary-soft);
  color: var(--color-primary-deep);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: "SF Mono", "JetBrains Mono", Consolas, monospace;
}

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

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2em 0;
}

/* 文章标签 */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.article-tags .tag {
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all 0.2s ease-out;
}

.article-tags .tag:hover {
  background: var(--color-primary);
  color: #FFFFFF;
}

/* 侧边栏 */
.side-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
}

.side-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.side-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 32px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px;
}

/* 作者卡 */
.author-card {
  text-align: center;
}

.author-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}

.author-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.author-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* 相关推荐 */
.related-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.related-list a {
  display: flex;
  gap: 12px;
  align-items: center;
  transition: all 0.2s ease-out;
}

.related-list a:hover .related-title {
  color: var(--color-primary);
}

.related-list img {
  width: 72px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}

.related-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.related-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease-out;
}

.related-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* 分类导航 */
.category-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: all 0.2s ease-out;
}

.category-list a::after {
  content: "→";
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.2s ease-out;
}

.category-list a:hover,
.category-list a.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 500;
}

.category-list a:hover::after,
.category-list a.active::after {
  opacity: 1;
  transform: translateX(0);
}

/* 文末翻页 */
.post-pager {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  margin-top: 32px;
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease-out;
  min-width: 0;
}

.pager-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.pager-link.is-disabled {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.pager-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.pager-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.pager-link.next {
  text-align: right;
}

.pager-home {
  flex-shrink: 0;
}

/* 未找到 */
.not-found {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 64px 24px;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.not-found svg {
  width: 72px;
  height: 72px;
  color: var(--color-text-muted);
  margin: 0 auto 24px;
}

.not-found h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.not-found p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

/* CTA */
.cta-band {
  background: var(--color-primary);
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-text h2 {
  font-size: clamp(1.375rem, 2.5vw, 2rem);
  color: #FFFFFF;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-text p {
  color: rgba(255,255,255,0.85);
  font-size: 0.9375rem;
}

.cta-inner .btn-cta {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 700;
}

.cta-inner .btn-cta:hover {
  background: var(--color-primary-soft);
  transform: scale(1.03);
}

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

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

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

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s ease-out;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.social-links {
  display: flex;
  gap: 10px;
}

.social-links a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease-out;
}

.social-links a:hover {
  background: var(--color-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* 底部固定转化条 */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(255,255,255,0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 20px rgba(26,46,69,0.06);
  transition: transform 0.35s ease-out;
}

.sticky-cta.hidden {
  transform: translateY(100%);
}

.sticky-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  height: 64px;
  position: relative;
  padding-right: 48px;
}

.sticky-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sticky-close {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease-out;
}

.sticky-close:hover {
  background: var(--color-error);
  color: #FFFFFF;
}

/* 滚动动效 */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* 响应式 */
@media (min-width: 1024px) {
  .mobile-menu,
  .menu-mask {
    display: none;
  }
}

@media (max-width: 1023px) {
  .header-cta {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .search-trigger {
    min-width: 40px;
    width: 40px;
    padding: 0;
    justify-content: center;
  }
  .search-text,
  .search-kbd {
    display: none;
  }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .post-pager {
    grid-template-columns: 1fr;
  }
  .pager-home {
    order: -1;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 64px;
  }
  .breadcrumb {
    padding: 12px 0;
  }
  .breadcrumb .current {
    max-width: 40ch;
  }
  .article-main {
    padding: 24px 0 56px;
  }
  .article-card {
    padding: 24px;
  }
  .article-h1 {
    font-size: 1.5rem;
    margin-bottom: 16px;
  }
  .article-meta {
    gap: 8px;
    font-size: 0.75rem;
  }
  .article-body {
    font-size: 1rem;
    line-height: 1.85;
  }
  .article-body th,
  .article-body td {
    padding: 8px 10px;
    font-size: 0.8125rem;
  }
  .post-pager {
    grid-template-columns: 1fr;
  }
  .pager-link {
    padding: 12px 16px;
  }
  .side-card {
    padding: 20px;
  }
  .cta-inner {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .sticky-inner {
    justify-content: space-between;
    gap: 8px;
    padding-right: 40px;
  }
  .sticky-text {
    font-size: 0.8125rem;
    max-width: 70%;
  }
  .sticky-cta .btn-sm {
    padding: 0 14px;
    font-size: 0.8125rem;
    height: 34px;
    flex-shrink: 0;
  }
}

@media (max-width: 520px) {
  .header-inner {
    gap: 8px;
  }
  .brand-text {
    font-size: 0.9375rem;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
  }
  .search-trigger {
    width: 36px;
    height: 36px;
  }
  .menu-toggle {
    width: 36px;
    height: 36px;
  }
  .breadcrumb a,
  .breadcrumb span {
    font-size: 0.75rem;
  }
  .article-meta {
    flex-wrap: wrap;
  }
  .meta-dot {
    display: none;
  }
  .sticky-text {
    max-width: 60%;
  }
}

/* roulang page: category2 */
:root {
  --color-primary: #1C7DD6;
  --color-primary-dark: #1565B0;
  --color-primary-soft: #E8F2FC;
  --color-accent: #21B8BD;
  --color-cta: #FF7843;
  --color-cta-hover: #F5662E;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #1A2E45;
  --color-text-secondary: #52677D;
  --color-border: #E2E9F2;
  --color-success: #2FBF71;
  --color-warning: #F5A623;
  --color-error: #E5484D;
  --shadow-sm: 0 1px 4px rgba(26,46,69,0.06);
  --shadow-md: 0 4px 16px rgba(26,46,69,0.08);
  --shadow-lg: 0 8px 30px rgba(26,46,69,0.10);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-btn: 10px;
  --radius-full: 999px;
  --container-w: 1200px;
  --header-h: 72px;
  --space-section: clamp(56px, 6vw, 96px);
  --space-inner: 32px;
  --font-stack: system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

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

body {
  font-family: var(--font-stack);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,0.90);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease-out;
}

.brand:hover .brand-icon {
  transform: rotate(-6deg) scale(1.04);
}

.brand-text {
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.2s ease-out;
}

.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 600;
}

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

.command-search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 220px;
  height: 40px;
  padding: 0 14px;
  background: #F1F4F8;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  transition: box-shadow 0.2s ease-out, background 0.2s ease-out;
}

.command-search:hover {
  background: #ECF0F6;
}

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

.command-search span {
  flex: 1;
  font-size: 0.875rem;
  color: #8A9BB0;
}

.command-search kbd {
  font-family: var(--font-stack);
  font-size: 0.6875rem;
  padding: 2px 6px;
  background: #E6EAF0;
  border-radius: 4px;
  color: var(--color-text-secondary);
  border: 1px solid #D8DFE8;
}

.quick-entry {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--color-text-secondary);
  background: #F1F4F8;
  transition: all 0.2s ease-out;
}

.quick-entry:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  background: var(--color-cta);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(255,120,67,0.35);
  transition: all 0.2s ease-out;
}

.btn-primary:hover {
  background: var(--color-cta-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255,120,67,0.4);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s ease-out;
}

.btn-outline:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-outline:active {
  transform: translateY(0) scale(0.98);
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--color-text-secondary);
  transition: all 0.2s ease-out;
}

.icon-btn:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #F1F4F8;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

/* drawer */
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(15,23,42,0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-out;
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.drawer-panel {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  z-index: 1200;
  background: var(--color-surface);
  box-shadow: -8px 0 30px rgba(26,46,69,0.15);
  padding: 28px 24px;
  transition: right 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

.drawer-panel.open {
  right: 0;
}

.drawer-panel .brand {
  margin-bottom: 8px;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-nav a {
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.2s ease-out;
}

.drawer-nav a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.drawer-nav a.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}

.drawer-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 14px;
  background: #F1F4F8;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
}

.drawer-search span {
  font-size: 0.875rem;
  color: #8A9BB0;
}

.drawer-panel .btn-primary {
  width: 100%;
}

/* ========== Page Hero ========== */
.cat-hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary-soft) 0%, #F7F9FC 55%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  background-blend-mode: overlay;
  padding: clamp(64px, 8vw, 100px) 0 clamp(48px, 6vw, 80px);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.cat-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(33,184,189,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.cat-hero::after {
  content: '';
  position: absolute;
  right: -60px;
  bottom: -100px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(28,125,214,0.15) 0%, transparent 70%);
  pointer-events: none;
}

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

.cat-hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.cat-hero-text {
  max-width: 560px;
}

.cat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(28,125,214,0.4);
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.7);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.cat-hero-badge svg {
  width: 16px;
  height: 16px;
}

.cat-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

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

.cat-hero p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

.cat-hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.cat-hero-trust {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.cat-hero-trust .trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cat-hero-trust .trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
}

.cat-hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-device-card {
  width: 260px;
  border-radius: 28px;
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--color-border);
}

.hero-device-card .device-notch {
  height: 32px;
  background: #1A2E45;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-device-card .device-notch span {
  width: 90px;
  height: 6px;
  background: #33445C;
  border-radius: 3px;
}

.hero-device-card .device-body {
  background: var(--color-surface);
  padding-bottom: 12px;
}

.hero-device-card .device-body img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.device-status-bar {
  display: flex;
  justify-content: space-between;
  padding: 10px 16px;
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  background: var(--color-surface);
}

.hero-float-card {
  position: absolute;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-float-card.feedback {
  top: 30px;
  left: 0;
  min-width: 120px;
}

.hero-float-card.download-progress {
  bottom: 40px;
  right: 0;
  min-width: 150px;
}

.hero-float-card .label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.hero-float-card .value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.hero-float-card .stars {
  color: var(--color-warning);
  font-size: 0.75rem;
  letter-spacing: 1px;
}

.progress-track {
  width: 70px;
  height: 6px;
  background: #EDF1F6;
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 3px;
  width: 85%;
}

.download-btn-inline {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ========== Stats Bar ========== */
.stats-section {
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease-out;
}

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

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.stat-icon.accent {
  background: rgba(33,184,189,0.12);
  color: var(--color-accent);
}

.stat-info .stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.stat-info .stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

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

.section-alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-head p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

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

.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  transition: all 0.2s ease-out;
  position: relative;
  overflow: hidden;
}

.feature-card.c1 {
  background: var(--color-primary-soft);
}

.feature-card.c2 {
  background: rgba(33,184,189,0.08);
}

.feature-card.c3 {
  background: #F5F7FA;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

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

.feature-icon.orange-icon {
  background: var(--color-surface);
  color: var(--color-cta);
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
}

.feature-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease-out;
}

.feature-link:hover svg {
  transform: translateX(3px);
}

/* ========== Flow Section ========== */
.flow-section {
  background: var(--color-surface);
}

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

.flow-grid::before {
  content: '';
  position: absolute;
  top: 56px;
  left: 15%;
  right: 15%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--color-border) 0 6px, transparent 6px 12px);
  pointer-events: none;
}

.flow-step {
  text-align: center;
  padding: 0 16px;
}

.flow-step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.375rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(28,125,214,0.3);
  position: relative;
  z-index: 2;
  border: 4px solid var(--color-surface);
}

.flow-step-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 16px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.flow-step-img img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform 0.3s ease-out;
}

.flow-step:hover .flow-step-img img {
  transform: scale(1.04);
}

.flow-step h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.flow-step p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ========== Compatibility Bento ========== */
.bento-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
}

.bento-main {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.bento-main img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.bento-main-content {
  padding: 28px;
}

.bento-main-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.bento-main-content p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.bento-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.bento-card {
  flex: 1;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.bento-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.bento-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.bento-card p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ========== Version Info ========== */
.version-band {
  background: linear-gradient(135deg, #1C7DD6 0%, #155EAA 100%);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.version-band::before {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 220px;
  height: 220px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
  pointer-events: none;
}

.version-band-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.version-item {
  text-align: center;
  padding: 16px 8px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  backdrop-filter: blur(4px);
}

.version-item .v-label {
  font-size: 0.8125rem;
  opacity: 0.85;
  margin-bottom: 4px;
}

.version-item .v-value {
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.version-item .v-note {
  font-size: 0.75rem;
  opacity: 0.75;
  margin-top: 4px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  transition: all 0.2s ease-out;
}

.faq-item.open {
  background: var(--color-primary-soft);
  border-color: rgba(28,125,214,0.2);
}

.faq-question {
  min-height: 56px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease-out;
}

.faq-icon svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease-out;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer-inner {
  padding: 0 20px 18px 20px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
}

/* ========== CTA Band ========== */
.cta-band {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.1;
  pointer-events: none;
}

.cta-band h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
}

.cta-band p {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 28px;
  position: relative;
}

.cta-band .btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  background: #fff;
  color: var(--color-primary);
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.9375rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transition: all 0.2s ease-out;
  position: relative;
}

.cta-band .btn-light:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
  margin-top: 0;
}

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

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

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

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

.footer-col ul a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s ease-out;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.social-links {
  display: flex;
  gap: 8px;
}

.social-links a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease-out;
}

.social-links a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ========== Bottom Fixed Bar ========== */
.fix-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  z-index: 900;
  display: flex;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 32px);
  box-shadow: 0 -4px 20px rgba(26,46,69,0.04);
  transition: transform 0.3s ease-out;
}

.fix-bar.hidden {
  transform: translateY(100%);
}

.fix-bar-content {
  max-width: var(--container-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
}

.fix-bar-text {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: 500;
}

.fix-bar-text .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  flex-shrink: 0;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fix-bar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fix-bar-close {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  background: #F1F4F8;
  transition: all 0.2s ease-out;
}

.fix-bar-close:hover {
  background: #E6EAF0;
  color: var(--color-text);
}

.fix-bar .btn-primary {
  height: 38px;
  padding: 0 18px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .nav-links {
    gap: 2px;
  }
  .nav-links a {
    padding: 8px 10px;
    font-size: 0.875rem;
  }
  .command-search {
    width: 160px;
  }
  .features-grid {
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  :root {
    --header-h: 64px;
  }
  .nav-links {
    display: none;
  }
  .command-search,
  .quick-entry {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .header-actions .btn-primary {
    display: none;
  }
  .cat-hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cat-hero-visual {
    order: 2;
  }
  .cat-hero-text {
    text-align: center;
  }
  .cat-hero-actions,
  .cat-hero-trust {
    justify-content: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .flow-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .flow-grid::before {
    display: none;
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .version-band-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .version-band {
    padding: 32px 20px;
  }
  .faq-question {
    font-size: 0.9375rem;
  }
  .cta-band {
    padding: 40px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .fix-bar-text .desktop-only {
    display: none;
  }
  .fix-bar .btn-primary {
    padding: 0 14px;
    font-size: 0.875rem;
  }
}

@media (max-width: 520px) {
  .hero-float-card.feedback {
    top: 12px;
    left: -4px;
  }
  .hero-float-card.download-progress {
    bottom: 16px;
    right: -4px;
  }
  .version-band-grid {
    grid-template-columns: 1fr 1fr;
  }
  .version-item .v-value {
    font-size: 1.0625rem;
  }
  .fix-bar {
    height: 60px;
  }
  .fix-bar-text {
    font-size: 0.8125rem;
  }
  .faq-item {
    border-radius: 12px;
  }
}

/* Focus accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* roulang page: category3 */
:root {
  --color-primary: #1C7DD6;
  --color-primary-dark: #145FA8;
  --color-primary-soft: #E8F2FC;
  --color-accent: #21B8BD;
  --color-accent-soft: #E1F5F6;
  --color-cta: #FF7843;
  --color-cta-dark: #EE5D26;
  --color-bg: #F7F9FC;
  --color-surface: #FFFFFF;
  --color-text: #1A2E45;
  --color-text-secondary: #52677D;
  --color-border: #E2E9F2;
  --color-success: #2FBF71;
  --color-warning: #F5A623;
  --color-error: #E5484D;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 4px rgba(26,46,69,0.06);
  --shadow-md: 0 4px 16px rgba(26,46,69,0.08);
  --shadow-lg: 0 8px 30px rgba(26,46,69,0.10);
  --font-family: system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-section: clamp(56px, 6vw, 96px);
  --container-pad: clamp(16px, 4vw, 32px);
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 1rem;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s ease-out, background-color 0.2s ease-out, border-color 0.2s ease-out, box-shadow 0.2s ease-out, transform 0.2s ease-out; }
a:hover { color: var(--color-primary-dark); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; font-size: 0.9375rem; color: var(--color-text); background: var(--color-surface); border: none; outline: none; width: 100%; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { font-weight: 700; line-height: 1.35; color: var(--color-text); }
[id] { scroll-margin-top: calc(var(--header-h) + 24px); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--color-primary-soft); color: var(--color-primary-dark); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.section { padding: var(--space-section) 0; }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto clamp(36px, 4vw, 56px);
}
.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.8125rem;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  font-weight: 600;
}
.section-head h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); margin-bottom: 12px; }
.section-head p { color: var(--color-text-secondary); font-size: 0.9625rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: all 0.22s ease-out;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn-cta {
  background: var(--color-cta);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,120,67,0.28);
}
.btn-cta:hover { background: var(--color-cta-dark); color: #fff; box-shadow: 0 6px 20px rgba(255,120,67,0.34); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(28,125,214,0.22);
}
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(28,125,214,0.35);
}
.btn-outline:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }
.btn-sm { padding: 9px 18px; font-size: 0.875rem; border-radius: 10px; }

/* Badges */
.badge {
  display: inline-block;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  line-height: 1.4;
}
.badge-accent { background: var(--color-accent-soft); color: var(--color-accent); }

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 10px rgba(28,125,214,0.28);
}
.brand-text { font-size: 1.0625rem; font-weight: 700; color: var(--color-text); letter-spacing: 0.2px; }
.brand:hover .brand-text { color: var(--color-primary); }
.nav-links { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 10px 14px;
  border-radius: 8px;
  transition: all 0.2s ease-out;
  line-height: 1.2;
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.nav-links a.active { background: var(--color-primary-soft); color: var(--color-primary); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 220px;
  height: 40px;
  background: #F1F4F8;
  border-radius: var(--radius-pill);
  padding: 0 14px;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all 0.2s ease-out;
  cursor: text;
}
.search-box:hover { border-color: var(--color-border); background: var(--color-surface); box-shadow: var(--shadow-sm); }
.search-box:focus-within { border-color: var(--color-primary); background: var(--color-surface); box-shadow: 0 0 0 3px rgba(28,125,214,0.14); }
.search-box svg { flex-shrink: 0; }
.search-kbd {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2px 7px;
  margin-left: auto;
  white-space: nowrap;
  font-family: inherit;
}
.menu-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--radius-xs); color: var(--color-text); transition: all 0.2s ease-out; }
.menu-toggle:hover { background: var(--color-primary-soft); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0; right: -320px;
  width: 320px;
  max-width: 86vw;
  height: 100vh;
  height: 100dvh;
  background: var(--color-surface);
  box-shadow: -8px 0 30px rgba(26,46,69,0.14);
  z-index: 1200;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: right 0.32s ease-out;
  overflow-y: auto;
}
.mobile-menu.open { right: 0; }
.mobile-menu .drawer-top { display: flex; align-items: center; justify-content: space-between; }
.mobile-menu .drawer-close { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 8px; color: var(--color-text); }
.mobile-menu .drawer-close:hover { background: var(--color-primary-soft); }
.mobile-menu .drawer-nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu .drawer-nav a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease-out;
}
.mobile-menu .drawer-nav a:hover, .mobile-menu .drawer-nav a.active { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu .search-box { width: 100%; }
.mobile-menu .btn-cta { justify-content: center; width: 100%; }
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,27,40,0.6);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transition: all 0.28s ease-out;
}
.mobile-overlay.show { opacity: 1; visibility: visible; }
body.menu-open { overflow: hidden; }

/* Page Hero */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 72px;
  background: url('/assets/images/backpic/back-1.webp') center 30% / cover no-repeat;
  border-bottom: 1px solid rgba(232,242,252,0.7);
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 18% 12%, rgba(232,242,252,0.94), rgba(247,249,252,0.84) 70%);
  z-index: 0;
}
.hero-content { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-secondary); font-weight: 500; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { color: var(--color-text-secondary); }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(28,125,214,0.3);
  background: rgba(255,255,255,0.7);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 18px;
  max-width: 680px;
  letter-spacing: -0.3px;
}
.page-hero h1 .highlight { color: var(--color-primary); position: relative; }
.hero-desc {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }
.hero-trust {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 32px);
  flex-wrap: wrap;
  padding-top: 22px;
  border-top: 1px solid rgba(226,233,242,0.8);
}
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: var(--color-text-secondary); }
.trust-item svg { color: var(--color-accent); flex-shrink: 0; }

/* Checklist cards - two-column horizontal list */
.safety-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.h-card {
  display: flex;
  gap: 20px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  transition: all 0.25s ease-out;
  align-items: flex-start;
}
.h-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-border);
}
.h-card .h-thumb {
  width: 180px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-primary-soft);
}
.h-card .h-thumb img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform 0.3s ease-out; }
.h-card:hover .h-thumb img { transform: scale(1.04); }
.h-card .h-body { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; min-width: 0; }
.h-card .h-body h3 { font-size: 1.125rem; font-weight: 700; }
.h-card .h-body p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}
.h-card .h-link { font-size: 0.875rem; font-weight: 600; color: var(--color-primary); margin-top: 2px; }
.h-card .h-link:hover { color: var(--color-primary-dark); }

/* Steps */
.steps-wrap {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: clamp(28px, 4vw, 48px);
}
.steps-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.step-item { flex: 1; text-align: center; padding: 0 8px; position: relative; }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 1.125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: inset 0 0 0 1px rgba(28,125,214,0.12);
}
.step-item h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.step-item p { font-size: 0.875rem; color: var(--color-text-secondary); max-width: 220px; margin: 0 auto; }
.step-arrow {
  flex-shrink: 0;
  padding-top: 16px;
  color: var(--color-border);
  display: flex;
  align-items: center;
}
.step-arrow svg { width: 28px; height: 28px; }

/* Scenario cards */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
  transition: all 0.25s ease-out;
  text-align: center;
}
.scenario-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--color-border); }
.scenario-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.scenario-card:nth-child(1) .scenario-icon { background: var(--color-primary-soft); color: var(--color-primary); }
.scenario-card:nth-child(2) .scenario-icon { background: var(--color-accent-soft); color: var(--color-accent); }
.scenario-card:nth-child(3) .scenario-icon { background: #FFF0E9; color: var(--color-cta); }
.scenario-card h3 { font-size: 1.0625rem; margin-bottom: 10px; }
.scenario-card p { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.7; }

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease-out;
  overflow: hidden;
}
.faq-item.open {
  background: var(--color-primary-soft);
  border-color: rgba(28,125,214,0.25);
  box-shadow: var(--shadow-md);
}
.faq-question {
  width: 100%;
  min-height: 58px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  transition: all 0.2s ease-out;
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease-out;
}
.faq-item.open .faq-icon { background: var(--color-primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease-out;
}
.faq-answer-inner { padding: 0 20px 20px; font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.8; }

/* CTA Band */
.cta-band {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: clamp(40px, 5vw, 64px) clamp(24px, 4vw, 56px);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: -40px; right: -30px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  pointer-events: none;
}
.cta-band::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -20px;
  width: 140px; height: 140px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}
.cta-band h2 { color: #fff; font-size: clamp(1.5rem, 2.5vw, 2.1rem); margin-bottom: 14px; position: relative; z-index: 1; }
.cta-band p { color: rgba(255,255,255,0.88); font-size: 1rem; max-width: 520px; margin: 0 auto 28px; position: relative; z-index: 1; }
.cta-band .btn-cta { position: relative; z-index: 1; background: #fff; color: var(--color-primary); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
.cta-band .btn-cta:hover { background: var(--color-primary-soft); }

/* Footer */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { font-size: 0.875rem; color: var(--color-text-secondary); max-width: 300px; margin-top: 8px; line-height: 1.8; }
.footer-col h4 { font-size: 0.875rem; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s ease-out;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col a::before { content: ''; width: 4px; height: 4px; border-radius: 50%; background: var(--color-border); transition: all 0.2s ease-out; flex-shrink: 0; }
.footer-col a:hover { color: var(--color-primary); }
.footer-col a:hover::before { background: var(--color-primary); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease-out;
}
.social-links a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }

/* Sticky bottom bar */
.sticky-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 64px;
  background: rgba(255,255,255,0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  z-index: 900;
  display: flex;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 32px);
  transition: transform 0.3s ease-out;
}
.sticky-bar.hidden { transform: translateY(100%); }
.sticky-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.sticky-bar-text { font-size: 0.875rem; color: var(--color-text); font-weight: 600; display: flex; align-items: center; gap: 10px; }
.sticky-bar-text .badge { font-size: 0.75rem; }
.sticky-bar .btn-cta { padding: 10px 22px; font-size: 0.875rem; }
.sticky-close {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-secondary);
  transition: all 0.2s ease-out;
  flex-shrink: 0;
}
.sticky-close:hover { background: var(--color-primary-soft); color: var(--color-primary); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.45s ease-out, transform 0.45s ease-out; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Responsive */
@media (max-width: 1023px) {
  .search-box { width: 40px; padding: 0 10px; }
  .search-kbd { display: none; }
  .search-box input { display: none; }
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .steps-row { flex-direction: column; gap: 28px; }
  .step-arrow { display: none; }
  .step-item { text-align: left; display: flex; align-items: flex-start; gap: 16px; }
  .step-num { margin: 0; flex-shrink: 0; }
  .step-item p { margin: 0; }
  .scenario-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .header-actions { gap: 8px; }
  .header-actions .btn-cta { display: none; }
  .search-box { width: 40px; padding: 0 10px; }
  .safety-grid { grid-template-columns: 1fr; }
  .h-card { padding: 14px; }
  .h-card .h-thumb { width: 132px; }
  .page-hero { padding: calc(var(--header-h) + 40px) 0 56px; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { gap: 14px 22px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .faq-item { border-radius: 12px; }
  .sticky-bar-text { font-size: 0.8125rem; }
  .sticky-bar-text .badge { display: none; }
  .cta-band { border-radius: var(--radius-lg); }
}
@media (max-width: 520px) {
  .h-card { flex-direction: column; }
  .h-card .h-thumb { width: 100%; }
  .h-card .h-thumb img { aspect-ratio: 16/8; }
  .page-hero h1 { font-size: 1.75rem; }
  .sticky-bar { padding: 0 14px; }
  .sticky-bar .btn-cta { padding: 9px 16px; font-size: 0.8125rem; }
  .sticky-bar-text { max-width: 170px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
}
@media (min-width: 1024px) {
  .mobile-menu, .mobile-overlay { display: none !important; }
}