/* roulang page: index */
:root {
  --brand-50: #EFF8F9;
  --brand-100: #D8EFF1;
  --brand-200: #B0DFE3;
  --brand-500: #0F7B80;
  --brand-600: #0C666C;
  --brand-700: #0A5158;
  --brand-800: #083E44;
  --accent: #E2A45B;
  --accent-weak: #F9EFE3;
  --ink-900: #17262B;
  --ink-600: #46565C;
  --ink-400: #7A8A90;
  --bg-page: #F6F9FA;
  --bg-surface: #FFFFFF;
  --border-light: #E4ECEE;
  --radius-card: 20px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --radius-chip: 999px;
  --shadow-card: 0 1px 2px rgba(15,71,75,0.06), 0 4px 12px rgba(15,71,75,0.05);
  --shadow-hover: 0 8px 20px rgba(15,71,75,0.10), 0 20px 40px rgba(15,71,75,0.08);
  --shadow-float: 0 12px 24px rgba(15,71,75,0.16), 0 24px 56px rgba(15,71,75,0.12);
  --container-w: 1280px;
  --header-h: 72px;
  --space-section: 112px;
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-900);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-head .tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--brand-50);
  color: var(--brand-700);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius-chip);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-900);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--ink-600);
  line-height: 1.8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: all .2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-600);
  color: #fff;
  border-color: var(--brand-600);
}

.btn-primary:hover {
  background: var(--brand-700);
  border-color: var(--brand-700);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0) scale(.99);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--brand-700);
  border-color: var(--brand-200);
}

.btn-secondary:hover {
  border-color: var(--brand-400, var(--brand-500));
  background: var(--brand-50);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent);
  color: var(--ink-900);
  border-color: var(--accent);
}

.btn-accent:hover {
  background: #d8954c;
  transform: translateY(-1px);
}

.btn-sm { height: 42px; padding: 0 22px; font-size: 14px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--brand-800);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo .logo-dot {
  color: var(--accent);
}

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

.nav-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-chip);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-600);
  background: transparent;
  border: 1px solid transparent;
  transition: all .2s ease;
}

.nav-chip:hover {
  color: var(--brand-700);
  background: var(--brand-50);
}

.nav-chip.active {
  color: var(--brand-700);
  background: var(--brand-50);
  border-color: var(--brand-100);
  font-weight: 600;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--brand-50);
  align-items: center;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-700);
  transition: all .2s;
}

.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  position: relative;
  background: var(--bg-surface);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,.95) 0%, rgba(255,255,255,.82) 45%, rgba(255,255,255,.55) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 96px 24px;
  max-width: 760px;
  margin-left: 0;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  color: var(--brand-700);
  border-radius: var(--radius-chip);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink-900);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--ink-600);
  line-height: 1.75;
  max-width: 620px;
  margin-bottom: 32px;
}

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

/* Capability */
.capability-section {
  background: var(--bg-page);
}

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

.capability-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .3s ease, transform .3s ease;
}

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

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--brand-50);
  color: var(--brand-600);
  margin-bottom: 20px;
}

.capability-icon svg {
  width: 26px;
  height: 26px;
}

.capability-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 12px;
}

.capability-card p {
  font-size: 15px;
  color: var(--ink-600);
  line-height: 1.8;
}

/* Demo */
.demo-section {
  background: var(--bg-surface);
}

.demo-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}

.demo-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.demo-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.demo-media::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(to top, rgba(8,62,68,.35), transparent);
}

.demo-content .section-head {
  margin-bottom: 24px;
}

.demo-features {
  margin: 20px 0 28px;
  display: grid;
  gap: 12px;
}

.demo-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--ink-600);
  line-height: 1.7;
}

.demo-features li::before {
  content: "✓";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--brand-100);
  color: var(--brand-700);
  font-size: 12px;
  font-weight: 700;
  margin-top: 2px;
}

/* Proof */
.proof-section {
  background: var(--brand-50);
  position: relative;
  overflow: hidden;
}

.proof-section::before {
  content: "9";
  position: absolute;
  right: -60px;
  top: -80px;
  font-size: 320px;
  font-weight: 800;
  color: rgba(15,123,128,.06);
  line-height: 1;
  pointer-events: none;
}

.proof-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--brand-700);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-600);
}

.proof-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.proof-badge {
  padding: 10px 22px;
  background: var(--bg-surface);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius-chip);
  font-size: 14px;
  font-weight: 500;
  color: var(--brand-700);
}

/* Price */
.price-section {
  background: var(--bg-page);
}

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

.price-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: box-shadow .3s ease, transform .3s ease;
}

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

.price-card--featured {
  border-color: var(--brand-200);
  padding: 40px 32px;
  box-shadow: var(--shadow-hover);
  position: relative;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--brand-50) 100%);
}

.price-card--featured::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--accent);
}

.price-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--brand-50);
  color: var(--brand-700);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius-chip);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  align-self: flex-start;
}

.price-card--featured .price-tag {
  background: var(--accent-weak);
  border-color: #f0d5b8;
  color: var(--ink-900);
}

.price-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 8px;
}

.price-note {
  font-size: 15px;
  color: var(--ink-400);
  margin-bottom: 20px;
}

.price-list {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
  flex: 1;
}

.price-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-600);
  line-height: 1.7;
}

.price-list li::before {
  content: "✓";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--brand-100);
  color: var(--brand-700);
  font-size: 11px;
  font-weight: 700;
  margin-top: 3px;
}

.price-card--featured .price-list li::before {
  background: var(--accent);
  color: #fff;
}

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

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow .3s ease;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-900);
  text-align: left;
  line-height: 1.5;
}

.faq-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand-50);
  color: var(--brand-700);
  font-size: 18px;
  font-weight: 300;
  transition: transform .25s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  border-top: 1px dashed var(--border-light);
  margin: 0 24px 0 24px;
}

.faq-answer p {
  padding-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-600);
}

/* News */
.news-section {
  background: var(--bg-page);
}

.news-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.news-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow .3s ease, transform .3s ease;
  display: flex;
}

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

.news-card--large {
  grid-column: 1 / -1;
  flex-direction: row;
}

.news-card--large .news-card__thumb {
  width: 320px;
  min-width: 320px;
}

.news-card--large .news-card__thumb img {
  height: 100%;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.news-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-card__body h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}

.news-card--large .news-card__body h3 {
  font-size: 20px;
}

.news-card__body h3 a:hover {
  color: var(--brand-700);
}

.news-card__excerpt {
  font-size: 14px;
  color: var(--ink-600);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.chip {
  display: inline-block;
  padding: 3px 12px;
  background: var(--brand-50);
  color: var(--brand-700);
  border-radius: var(--radius-chip);
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--brand-100);
}

.news-card__meta time {
  font-size: 12px;
  color: var(--ink-400);
}

.news-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-600);
  transition: gap .2s ease, color .2s ease;
}

.news-more:hover {
  gap: 8px;
  color: var(--brand-700);
}

.news-card--small {
  flex-direction: row;
}

.news-card--small .news-card__thumb {
  width: 96px;
  min-width: 96px;
}

.news-card--small .news-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card--small .news-card__body {
  padding: 16px;
}

.news-card--small .news-card__body h3 {
  font-size: 16px;
}

.news-card--small .news-card__excerpt {
  font-size: 13px;
  -webkit-line-clamp: 1;
}

.news-empty {
  grid-column: 1 / -1;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-card);
  color: var(--ink-400);
  font-size: 15px;
}

.news-empty__icon {
  font-size: 36px;
}

/* CTA */
.cta-section {
  background: var(--brand-50);
}

.cta-box {
  background: var(--brand-600);
  border-radius: 28px;
  padding: 64px 48px;
  text-align: center;
  background-image: linear-gradient(135deg, var(--brand-600), var(--brand-800));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "9";
  position: absolute;
  left: 24px;
  bottom: -40px;
  font-size: 200px;
  font-weight: 800;
  color: rgba(255,255,255,.06);
  line-height: 1;
}

.cta-title {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-text {
  font-size: 16px;
  color: rgba(255,255,255,.85);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

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

/* Footer */
.site-footer {
  background: var(--ink-900);
  color: rgba(255,255,255,.75);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,.6);
  max-width: 280px;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  transition: color .2s;
}

.footer-links a:hover {
  color: var(--brand-200);
}

.footer-links li {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

/* Float CTA */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  background: var(--brand-600);
  color: #fff;
  border-radius: 999px;
  height: 48px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .4s ease, transform .4s ease, visibility .4s ease, background .2s;
}

.float-cta.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.float-cta:hover {
  background: var(--brand-700);
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --space-section: 80px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 12px 24px rgba(15,71,75,.08);
    display: none;
    gap: 4px;
  }

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

  .nav-chip {
    padding: 12px 16px;
    border-radius: 12px;
  }

  .header-actions .btn-primary {
    display: none;
  }

  .hero-inner {
    padding: 64px 24px;
  }

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

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

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

  .price-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .price-card--featured {
    order: -1;
  }

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

  .news-card--large {
    flex-direction: column;
  }

  .news-card--large .news-card__thumb {
    width: 100%;
    min-width: 100%;
  }

  .news-card--large .news-card__thumb img {
    aspect-ratio: 16 / 9;
  }

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

  .cta-box {
    padding: 48px 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --space-section: 56px;
  }

  .container {
    padding: 0 20px;
  }

  .hero-inner {
    padding: 48px 20px;
  }

  .hero-title {
    font-size: 26px;
  }

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

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

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

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

  .proof-stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-number {
    font-size: 32px;
  }

  .proof-badges {
    gap: 8px;
  }

  .proof-badge {
    padding: 6px 14px;
    font-size: 13px;
  }

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

  .cta-title {
    font-size: 24px;
  }

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

  .float-cta {
    left: 16px;
    right: 16px;
    bottom: 12px;
    height: 52px;
    border-radius: 14px;
    justify-content: center;
  }

  .news-card--small {
    flex-direction: column;
  }

  .news-card--small .news-card__thumb {
    width: 100%;
    min-width: 100%;
    max-height: 120px;
  }

  .news-card--small .news-card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 16 / 8;
  }
}

/* roulang page: article */
:root {
  --brand-50: #EFF8F9;
  --brand-100: #D8EFF1;
  --brand-200: #B0DFE3;
  --brand-500: #0F7B80;
  --brand-600: #0C666C;
  --brand-700: #0A5158;
  --brand-800: #083E44;
  --accent: #E2A45B;
  --accent-weak: #F9EFE3;
  --ink-900: #17262B;
  --ink-600: #46565C;
  --ink-400: #7A8A90;
  --bg-page: #F6F9FA;
  --bg-surface: #FFFFFF;
  --border-light: #E4ECEE;
  --radius-card: 20px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --shadow-card: 0 1px 2px rgba(15,71,75,0.06), 0 4px 12px rgba(15,71,75,0.05);
  --shadow-hover: 0 8px 20px rgba(15,71,75,0.10), 0 20px 40px rgba(15,71,75,0.08);
  --shadow-float: 0 12px 24px rgba(15,71,75,0.16), 0 24px 56px rgba(15,71,75,0.12);
  --container-w: 1280px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-page);
  color: var(--ink-900);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand-600); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--brand-700); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border-light);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink-900);
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--brand-600); }
.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.header-nav::-webkit-scrollbar { display: none; }
.nav-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-600);
  white-space: nowrap;
  transition: background 0.2s, color 0.2s, border 0.2s;
  border: 1px solid transparent;
}
.nav-chip:hover {
  background: var(--brand-50);
  color: var(--brand-700);
  text-decoration: none;
}
.nav-chip.active {
  background: var(--brand-50);
  color: var(--brand-700);
  border-color: var(--brand-100);
  font-weight: 600;
}
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  background: var(--brand-600);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s, transform 0.2s;
}
.header-cta:hover {
  background: var(--brand-700);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  border-radius: 8px;
}
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.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); }

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 56px 0 48px;
  background-color: var(--bg-page);
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border-light);
}
.breadcrumb {
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--ink-400);
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 0;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb li a { color: var(--ink-600); }
.breadcrumb li a:hover { color: var(--brand-600); }
.breadcrumb .sep { color: var(--ink-400); }
.breadcrumb .current { color: var(--ink-400); max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-head {
  max-width: 860px;
}
.article-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink-900);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--ink-600);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item svg { width: 16px; height: 16px; stroke: var(--ink-400); fill: none; stroke-width: 1.8; }

/* ===== Article Body ===== */
.article-main {
  padding: 48px 0 80px;
}
.article-layout {
  max-width: 860px;
  margin: 0 auto;
}
.article-body {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 48px 56px;
  box-shadow: var(--shadow-card);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-900);
}
.article-body > * + * { margin-top: 1.5em; }
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--ink-900);
  margin-top: 1.8em;
  padding-left: 14px;
  border-left: 4px solid var(--brand-500);
  line-height: 1.35;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-900);
  margin-top: 1.6em;
}
.article-body p { margin-bottom: 1.1em; }
.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 1.1em;
}
.article-body li { margin-bottom: 0.5em; }
.article-body img {
  border-radius: 14px;
  margin: 28px auto;
  box-shadow: var(--shadow-card);
}
.article-body blockquote {
  border-left: 3px solid var(--brand-200);
  background: var(--brand-50);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  color: var(--ink-600);
  font-style: normal;
}
.article-body a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--brand-700); }
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 24px 0;
}
.article-body th,
.article-body td {
  border: 1px solid var(--border-light);
  padding: 12px 14px;
  text-align: left;
}
.article-body th { background: var(--brand-50); font-weight: 600; }
.article-body code {
  background: #F0F3F4;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, monospace;
}
.article-body pre {
  background: var(--ink-900);
  color: #E8F0F1;
  padding: 24px;
  border-radius: 14px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
}
.article-body pre code { background: transparent; padding: 0; color: inherit; }

/* ===== Not Found ===== */
.not-found {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 64px 40px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.not-found h2 { font-size: 28px; margin-bottom: 16px; }
.not-found p { color: var(--ink-600); margin-bottom: 24px; }

/* ===== Article Footer Nav ===== */
.article-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
}
.btn-back,
.btn-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-back {
  background: var(--brand-50);
  color: var(--brand-700);
  border: 1px solid var(--brand-100);
}
.btn-back:hover {
  background: var(--brand-100);
  color: var(--brand-800);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-home {
  background: var(--bg-surface);
  color: var(--ink-600);
  border: 1px solid var(--border-light);
}
.btn-home:hover {
  border-color: var(--brand-200);
  color: var(--brand-700);
  text-decoration: none;
}

/* ===== Related ===== */
.related-section {
  margin-top: 56px;
}
.section-head {
  margin-bottom: 28px;
}
.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-weak);
  color: var(--accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink-900);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s, transform 0.3s;
  display: block;
  color: var(--ink-900);
}
.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  color: var(--ink-900);
  text-decoration: none;
}
.related-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--brand-50);
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.related-card:hover .related-cover img { transform: scale(1.03); }
.related-body { padding: 20px; }
.related-cat {
  display: inline-block;
  padding: 3px 10px;
  background: var(--brand-50);
  color: var(--brand-700);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}
.related-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-900);
}

/* ===== Article CTA ===== */
.article-cta {
  margin-top: 64px;
}
.cta-card {
  background: linear-gradient(135deg, var(--brand-50) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--brand-100);
  border-radius: var(--radius-card);
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.cta-card h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink-900);
}
.cta-card p {
  color: var(--ink-600);
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  background: var(--brand-600);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--brand-700);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(12,102,108,0.25);
}
.btn-primary:active {
  transform: translateY(0) scale(0.99);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink-900);
  color: rgba(255,255,255,0.85);
  padding: 64px 0 0;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
  max-width: 320px;
}
.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-links {
  list-style: none;
  padding: 0;
}
.footer-links li {
  margin-bottom: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
}
.footer-links a {
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--brand-200);
  text-decoration: none;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a { color: rgba(255,255,255,0.65); }
.footer-bottom a:hover { color: var(--brand-200); }

/* ===== Float CTA ===== */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 150;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 26px;
  background: var(--brand-600);
  color: #fff;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-float);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease, background 0.2s;
}
.float-cta a { display: inline-flex; align-items: center; gap: 8px; }
.float-cta:hover {
  background: var(--brand-700);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.float-cta.enter { opacity: 1; transform: translateY(0); }

/* ===== Focus State ===== */
:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .header-nav { gap: 4px; }
  .nav-chip { padding: 7px 10px; font-size: 13px; }
  .article-body { padding: 40px 36px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-container { height: 64px; }
  .header-cta { display: none; }
  .menu-toggle { display: flex; }
  .header-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    box-shadow: 0 12px 24px rgba(15,71,75,0.08);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    display: none;
    z-index: 199;
    border-bottom: 1px solid var(--border-light);
  }
  .header-nav.open { display: flex; }
  .nav-chip {
    padding: 12px 14px;
    font-size: 15px;
    border-radius: 12px;
    width: 100%;
  }
  .nav-chip:hover { background: var(--brand-50); }
  .article-hero { padding: 40px 0 32px; }
  .article-title { font-size: 28px; }
  .article-body { padding: 28px 20px; font-size: 15px; }
  .article-layout { padding: 0; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 32px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .article-footer-nav { flex-direction: column; align-items: stretch; }
  .btn-back, .btn-home { justify-content: center; }
  .float-cta {
    left: 16px;
    right: 16px;
    bottom: 12px;
    height: 52px;
    width: auto;
    border-radius: 14px;
    text-align: center;
    padding: 0 16px;
  }
}

/* roulang page: category1 */
:root {
            --brand-50: #EFF8F9;
            --brand-100: #D8EFF1;
            --brand-200: #B0DFE3;
            --brand-500: #0F7B80;
            --brand-600: #0C666C;
            --brand-700: #0A5158;
            --brand-800: #083E44;
            --accent: #E2A45B;
            --accent-weak: #F9EFE3;
            --ink-900: #17262B;
            --ink-600: #46565C;
            --ink-400: #7A8A90;
            --bg-page: #F6F9FA;
            --bg-surface: #FFFFFF;
            --border-light: #E4ECEE;
            --radius-card: 20px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --shadow-card: 0 1px 2px rgba(15, 71, 75, 0.06), 0 4px 12px rgba(15, 71, 75, 0.05);
            --shadow-hover: 0 8px 20px rgba(15, 71, 75, 0.10), 0 20px 40px rgba(15, 71, 75, 0.08);
            --shadow-float: 0 12px 24px rgba(15, 71, 75, 0.16), 0 24px 56px rgba(15, 71, 75, 0.12);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink-900);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        :focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
        }

        .btn-primary {
            background: var(--brand-600);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.99);
        }

        .btn-secondary {
            background: var(--bg-surface);
            color: var(--brand-700);
            border: 1px solid var(--brand-200);
        }

        .btn-secondary:hover {
            border-color: var(--brand-400, #6AB8BE);
            background: var(--brand-50);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(0) scale(0.99);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .logo {
            font-size: 21px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--ink-900);
            white-space: nowrap;
        }

        .logo:hover {
            color: var(--brand-600);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            min-width: 0;
        }

        .nav-chip {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 14px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink-600);
            white-space: nowrap;
            transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
            border: 1px solid transparent;
        }

        .nav-chip:hover {
            background: var(--brand-50);
            color: var(--brand-700);
        }

        .nav-chip.active {
            background: var(--brand-50);
            color: var(--brand-700);
            border-color: var(--brand-100);
            font-weight: 600;
        }

        .header-cta {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            border-radius: 8px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--ink-900);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

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

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

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

        .nav-cta-mobile {
            display: none;
        }

        /* Hero */
        .category-hero {
            position: relative;
            padding: 104px 0 96px;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0.80) 55%, rgba(239, 248, 249, 0.88) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--border-light);
        }

        .hero-inner {
            max-width: 860px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            height: 30px;
            padding: 0 14px;
            margin-bottom: 20px;
            border-radius: 999px;
            background: var(--accent-weak);
            color: #8A5A22;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--ink-900);
            letter-spacing: 1px;
        }

        .hero-sub {
            margin-top: 20px;
            font-size: 18px;
            line-height: 1.8;
            color: var(--ink-600);
            max-width: 720px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        /* Section */
        .section {
            padding: 112px 0;
        }

        .section-header {
            max-width: 720px;
            margin-bottom: 56px;
        }

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

        .section-tag {
            display: inline-flex;
            align-items: center;
            height: 28px;
            padding: 0 12px;
            border-radius: 999px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--ink-900);
        }

        .section-header p {
            margin-top: 16px;
            font-size: 16px;
            color: var(--ink-600);
            line-height: 1.8;
        }

        /* Overview */
        .overview-section {
            background: var(--bg-surface);
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .overview-media {
            position: relative;
            padding-right: 34px;
            padding-bottom: 34px;
        }

        .media-main {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .media-sub {
            position: absolute;
            right: 0;
            bottom: 0;
            width: 46%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: 16px;
            border: 5px solid #fff;
            box-shadow: var(--shadow-hover);
        }

        .overview-content h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--ink-900);
        }

        .overview-content>p {
            margin-top: 20px;
            font-size: 16px;
            line-height: 1.85;
            color: var(--ink-600);
        }

        .feature-list {
            margin-top: 28px;
            display: grid;
            gap: 16px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--ink-900);
            font-weight: 500;
        }

        .feature-list li svg {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            margin-top: 3px;
            color: var(--brand-500);
        }

        .overview-cta {
            margin-top: 32px;
        }

        /* Services */
        .services-section {
            background: var(--bg-page);
        }

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

        .service-card {
            position: relative;
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 36px 32px 32px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--brand-100);
        }

        .service-index {
            position: absolute;
            top: 32px;
            right: 32px;
            font-size: 14px;
            font-weight: 700;
            color: var(--brand-200);
            letter-spacing: 1px;
        }

        .service-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--brand-50);
            color: var(--brand-600);
            margin-bottom: 22px;
        }

        .service-icon svg {
            width: 26px;
            height: 26px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ink-600);
        }

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

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

        .process-step {
            position: relative;
            background: var(--bg-page);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 24px 28px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .step-num {
            display: inline-flex;
            align-items: center;
            height: 32px;
            padding: 0 12px;
            border-radius: 999px;
            background: var(--brand-600);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--ink-600);
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 48px;
            right: -24px;
            width: 24px;
            height: 2px;
            background: var(--brand-100);
        }

        .process-step:last-child::after {
            display: none;
        }

        /* Scenarios */
        .scenarios-section {
            background: var(--brand-50);
        }

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

        .scenario-card {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .scenario-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card::before {
            content: '';
            display: block;
            width: 36px;
            height: 4px;
            border-radius: 999px;
            background: var(--brand-200);
            margin-bottom: 18px;
        }

        .scenario-card.warm::before {
            background: var(--accent);
        }

        .scenario-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ink-600);
        }

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

        .faq-list {
            max-width: 880px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-item.open {
            border-color: var(--brand-100);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-900);
            text-align: left;
            transition: color 0.2s ease;
        }

        .faq-question:hover {
            color: var(--brand-600);
        }

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

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border-radius: 1px;
            background: var(--brand-600);
            transition: opacity 0.3s ease;
        }

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

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

        .faq-item.open .faq-icon {
            background: var(--brand-600);
        }

        .faq-item.open .faq-icon::before {
            background: #fff;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            font-size: 15px;
            line-height: 1.85;
            color: var(--ink-600);
            border-top: 0 solid var(--border-light);
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 24px 22px;
            border-top-width: 1px;
            border-top-style: dashed;
            padding-top: 18px;
            margin-top: 0;
        }

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

        .cta-card {
            position: relative;
            background: linear-gradient(135deg, var(--brand-50) 0%, #ffffff 60%, var(--accent-weak) 100%);
            border: 1px solid var(--border-light);
            border-radius: 24px;
            padding: 72px 48px;
            text-align: center;
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .cta-card h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--ink-900);
        }

        .cta-card p {
            margin-top: 16px;
            font-size: 16px;
            color: var(--ink-600);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .back-nav {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 12px;
            margin-top: -32px;
            padding-bottom: 32px;
            flex-wrap: wrap;
        }

        .back-chip {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 18px;
            border-radius: 999px;
            background: var(--bg-surface);
            border: 1px solid var(--border-light);
            font-size: 14px;
            color: var(--ink-600);
            transition: border-color 0.2s, color 0.2s, background 0.2s;
        }

        .back-chip:hover {
            border-color: var(--brand-200);
            color: var(--brand-700);
            background: var(--brand-50);
        }

        .back-chip.current-tag {
            background: var(--brand-600);
            border-color: var(--brand-600);
            color: #fff;
            font-weight: 500;
        }

        /* Footer */
        .site-footer {
            background: var(--ink-900);
            color: rgba(255, 255, 255, 0.85);
            padding: 72px 0 32px;
        }

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

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 320px;
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--brand-200);
        }

        .footer-links li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 24px;
            text-align: center;
        }

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

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 90;
            display: inline-flex;
            align-items: center;
            height: 52px;
            padding: 0 26px;
            border-radius: 999px;
            background: var(--brand-600);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            box-shadow: var(--shadow-float);
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.4s ease, transform 0.4s ease, background 0.2s ease;
            pointer-events: none;
        }

        .floating-cta.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .floating-cta:hover {
            background: var(--brand-700);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .header-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 20px;
                background: var(--bg-surface);
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(15, 71, 75, 0.08);
            }

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

            .nav-chip {
                justify-content: flex-start;
                width: 100%;
                height: 44px;
                padding: 0 16px;
                border-radius: 12px;
            }

            .nav-cta-mobile {
                display: inline-flex;
                justify-content: center;
                margin-top: 8px;
                height: 48px;
                width: 100%;
            }

            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

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

            .overview-media {
                padding-right: 0;
                padding-bottom: 0;
            }

            .media-sub {
                position: static;
                width: 70%;
                margin-top: -40px;
                margin-left: auto;
                border-width: 4px;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .process-step::after {
                display: none;
            }

            .section {
                padding: 80px 0;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 32px;
            }

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

            .section-header h2,
            .overview-content h2,
            .cta-card h2 {
                font-size: 24px;
            }

            .services-grid,
            .scenarios-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                padding: 48px 24px;
            }

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

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

            .section {
                padding: 56px 0;
            }

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

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

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

            .back-nav {
                flex-direction: column;
            }

            .back-chip {
                width: 100%;
                justify-content: center;
            }

            .floating-cta {
                left: 16px;
                right: 16px;
                bottom: 12px;
                height: 52px;
                border-radius: 14px;
                justify-content: center;
                padding: 0;
            }

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

            .media-sub {
                width: 60%;
                margin-top: -24px;
            }
        }