/* roulang page: index */
:root {
  --bg-base: #0E1311;
  --bg-elev: #161D19;
  --bg-hover: #1C2620;
  --primary: #C9973A;
  --primary-hover: #E0AE4E;
  --primary-soft: rgba(201,151,58,0.14);
  --accent: #6B8F71;
  --danger: #C25B3F;
  --text-hi: #F2E8D8;
  --text-mid: #B9AD98;
  --text-low: #7A715F;
  --border: rgba(242,232,216,0.10);
  --border-strong: rgba(242,232,216,0.18);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-badge: 999px;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.04);
  --shadow-hover: 0 20px 44px rgba(0,0,0,0.60);
  --section-space: 96px;
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-hi);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; display: block; border: 0; }
button, input { font-family: inherit; font-size: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* App Shell Sidebar */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 250px;
  height: 100vh;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .3s ease;
}
.sidebar-logo {
  padding: 28px 20px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo .logo-icon {
  width: 42px; height: 42px;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}
.sidebar-logo .logo-text {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-hi);
  line-height: 1.3;
}
.sidebar-nav { padding: 24px 12px; flex: 1; }
.sidebar-nav .nav-label {
  font-size: 12px;
  color: var(--text-low);
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: 0 10px 8px;
}
.sidebar-nav .nav-item {
  display: flex; align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 4px;
  border-radius: 8px;
  color: var(--text-mid);
  font-size: 14px;
  transition: background .2s, color .2s;
}
.sidebar-nav .nav-item i { width: 18px; text-align: center; font-size: 14px; }
.sidebar-nav .nav-item:hover { background: var(--bg-hover); color: var(--text-hi); }
.sidebar-nav .nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 500;
  border-left: 3px solid var(--primary);
  border-radius: 8px 0 0 8px;
  margin-left: -3px;
  padding-left: 15px;
}
.sidebar-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-low);
}
.sidebar-footer .contact-line { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.sidebar-footer .contact-line i { color: var(--primary); width: 14px; }
.sidebar-footer .contact-line strong { color: var(--text-mid); font-weight: 500; }

/* Mobile Header */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  z-index: 1100;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}
.mobile-header .hamburger-btn {
  background: transparent;
  color: var(--text-hi);
  font-size: 20px;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
}
.mobile-header .hamburger-btn:hover { background: var(--bg-hover); }
.mobile-header .mobile-logo {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-hi);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1050;
}

/* App Main */
.app-main {
  margin-left: 250px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.app-main main { flex: 1; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 30px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #1A1405;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201,151,58,0.3);
  color: #1A1405;
}
.btn-primary:active { transform: translateY(0); background: #B0832F; }
.btn-secondary {
  background: transparent;
  color: var(--text-hi);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-secondary:active { transform: translateY(0); }
.btn-text {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--primary);
  font-size: 14px; font-weight: 500;
  background: none;
  padding: 8px 0;
  cursor: pointer;
  transition: gap .2s;
  border: none;
}
.btn-text:hover { color: var(--primary-hover); gap: 10px; }
.btn:disabled {
  background: var(--bg-hover);
  color: var(--text-low);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
}
.badge-primary { background: var(--primary); color: #1A1405; }
.badge-outline { border: 1px solid var(--border-strong); color: var(--text-mid); background: transparent; }
.badge-soft { background: var(--primary-soft); color: var(--primary); }
.badge-score {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-hi);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.badge-score i { color: var(--primary); font-size: 11px; }

/* Hero */
.hero {
  position: relative;
  min-height: 88vh;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--bg-base);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 35%, rgba(201,151,58,0.18) 0%, transparent 55%),
    linear-gradient(to bottom, rgba(14,19,17,0.7) 0%, rgba(14,19,17,0.85) 55%, var(--bg-base) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 120px 32px 60px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}
.hero-left .badges-row { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.hero-left h1 {
  font-family: var(--font-serif);
  font-size: 46px;
  line-height: 1.25;
  color: var(--text-hi);
  font-weight: 700;
  margin-bottom: 14px;
}
.hero-left .hero-lead {
  font-size: 18px;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 520px;
}
.hero-left .hero-sub {
  font-size: 15px;
  color: var(--text-mid);
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 50px;
  display: flex;
  gap: 40px;
}
.hero-stats .stat { display: flex; align-items: baseline; gap: 8px; }
.hero-stats .stat .num {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
  color: var(--primary);
}
.hero-stats .stat .label { font-size: 13px; color: var(--text-mid); }

/* Hero Right Card (白皮书获客) */
.hero-card {
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}
.hero-card .hero-card-cover {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.hero-card .hero-card-cover img { width: 100%; height: 100%; object-fit: cover; }
.hero-card .hero-card-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(14,19,17,0.85) 0%, transparent 60%);
}
.hero-card .cover-badge {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 2;
  background: var(--primary);
  color: #1A1405;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-badge);
}
.hero-card .hero-card-body {
  padding: 24px;
  background: var(--bg-elev);
}
.hero-card .hero-card-body h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--text-hi);
  margin-bottom: 6px;
}
.hero-card .hero-card-body > p {
  font-size: 13px;
  color: var(--text-mid);
  margin-bottom: 14px;
}
.hero-card .toc-list { margin-bottom: 18px; }
.hero-card .toc-list li {
  font-size: 13px;
  color: var(--text-mid);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-card .toc-list li::before {
  content: '·';
  color: var(--primary);
  font-size: 18px;
  line-height: 1;
}
.lead-form { display: flex; flex-direction: column; gap: 10px; }
.lead-form input {
  height: 44px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  color: var(--text-hi);
  font-size: 14px;
  transition: border-color .2s, box-shadow .2s;
}
.lead-form input::placeholder { color: var(--text-low); }
.lead-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(201,151,58,0.15);
}
.lead-form .btn { width: 100%; margin-top: 4px; }
.form-success {
  background: rgba(107,143,113,0.12);
  border: 1px solid var(--accent);
  border-radius: var(--radius-btn);
  padding: 16px;
  font-size: 14px;
  color: var(--text-hi);
  display: flex;
  align-items: center;
  gap: 10px;
}
.form-success i { color: var(--accent); font-size: 20px; }

/* Section Common */
.section { padding: var(--section-space) 0; position: relative; }
.section-head { margin-bottom: 48px; }
.section-head .section-tag {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 8px;
  display: block;
}
.section-head h2 {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 600;
  color: var(--text-hi);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 640px;
  line-height: 1.8;
}
.section-head.center { text-align: center; }
.section-head.center p { margin: 0 auto; }

/* Feature Grid */
.features-section { background: var(--bg-base); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  position: relative;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}
.feature-card .feature-cover {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}
.feature-card .feature-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.feature-card:hover .feature-cover img { transform: scale(1.03); }
.feature-card .feature-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(14,19,17,0.92) 0%, rgba(14,19,17,0.15) 60%, transparent 100%);
}
.feature-card .feature-tag {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 2;
  background: rgba(14,19,17,0.75);
  border: 1px solid var(--border-strong);
  color: var(--text-mid);
  font-size: 12px;
  padding: 3px 12px;
  border-radius: var(--radius-badge);
  backdrop-filter: blur(4px);
}
.feature-card .feature-body {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px;
  z-index: 2;
}
.feature-card .feature-body h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 4px;
}
.feature-card .feature-body p {
  font-size: 13px;
  color: var(--text-mid);
  margin-bottom: 12px;
  line-height: 1.6;
}
.feature-card .feature-arrow {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-hi);
  font-size: 13px;
  transition: background .2s, color .2s, transform .2s;
}
.feature-card:hover .feature-arrow {
  background: var(--primary);
  color: #1A1405;
  transform: translateX(2px);
}

/* Scenarios */
.scenarios-section { background: linear-gradient(to bottom, var(--bg-base), rgba(22,29,25,0.6), var(--bg-base)); }
.scenario-list { display: flex; flex-direction: column; gap: 24px; }
.scenario-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  min-height: 200px;
  display: flex;
  align-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  transition: transform .3s, box-shadow .3s;
}
.scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.scenario-card .scenario-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.scenario-card .scenario-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(14,19,17,0.92) 0%, rgba(14,19,17,0.55) 55%, rgba(14,19,17,0.35) 100%);
}
.scenario-card .scenario-content {
  position: relative;
  z-index: 2;
  padding: 32px;
  max-width: 560px;
}
.scenario-card .scenario-tag {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 6px;
  display: block;
  font-weight: 500;
}
.scenario-card .scenario-content h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--text-hi);
  margin-bottom: 6px;
}
.scenario-card .scenario-content p {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 12px;
  line-height: 1.6;
}
.scenario-card .scenario-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-low);
}
.scenario-card .scenario-meta i { color: var(--primary); margin-right: 4px; }

/* Testimonials */
.testimonials-section { background: var(--bg-base); }
.testimonials-top {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.score-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  min-width: 220px;
  text-align: center;
}
.score-card .score-num {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.1;
}
.score-card .score-stars { color: var(--primary); font-size: 16px; margin: 6px 0; }
.score-card .score-total { font-size: 13px; color: var(--text-low); }
.testimonials-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: transform .3s, box-shadow .3s;
}
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.testimonial-card .t-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.testimonial-card .t-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  color: var(--primary);
  flex-shrink: 0;
  font-family: var(--font-serif);
}
.testimonial-card .t-name { font-size: 14px; font-weight: 500; color: var(--text-hi); }
.testimonial-card .t-tag { font-size: 12px; color: var(--text-low); }
.testimonial-card .t-stars { color: var(--primary); font-size: 12px; margin-bottom: 8px; }
.testimonial-card .t-text {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.7;
}

/* Pricing */
.pricing-section {
  background: radial-gradient(ellipse at 70% 20%, rgba(201,151,58,0.06) 0%, transparent 60%), var(--bg-base);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.pricing-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  position: relative;
}
.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}
.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(170deg, rgba(201,151,58,0.06) 0%, var(--bg-elev) 60%);
}
.pricing-card .popular-badge {
  position: absolute;
  top: 0; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--primary);
  color: #1A1405;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 18px;
  border-radius: var(--radius-badge);
  white-space: nowrap;
}
.pricing-card .plan-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 8px;
}
.pricing-card .plan-price {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.pricing-card .plan-price small {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-low);
  font-family: var(--font-sans);
}
.pricing-card .plan-desc { font-size: 13px; color: var(--text-mid); margin-bottom: 20px; }
.pricing-card .plan-features { margin-bottom: 24px; }
.pricing-card .plan-features li {
  font-size: 14px;
  color: var(--text-mid);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-card .plan-features li i { color: var(--primary); font-size: 12px; }
.pricing-card .btn { width: 100%; }

/* News */
.news-section { background: linear-gradient(to bottom, var(--bg-base), rgba(22,29,25,0.5), var(--bg-base)); }
.news-layout {
  display: grid;
  grid-template-columns: 1.5fr 0.7fr;
  gap: 40px;
}
.news-list .news-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left .2s;
}
.news-list .news-item:hover { padding-left: 10px; }
.news-list .news-item a {
  color: var(--text-hi);
  font-size: 15px;
  flex: 1;
  padding-right: 16px;
}
.news-list .news-item a:hover { color: var(--primary); }
.news-list .news-item .news-date {
  font-size: 13px;
  color: var(--text-low);
  white-space: nowrap;
}
.news-sidebar .news-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.news-sidebar .news-tags .tag-chip {
  padding: 5px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-badge);
  font-size: 12px;
  color: var(--text-mid);
  transition: background .2s, color .2s, border-color .2s;
  cursor: pointer;
}
.news-sidebar .news-tags .tag-chip:hover,
.news-sidebar .news-tags .tag-chip.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary);
}
.news-sidebar .side-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--text-hi);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.news-sidebar .side-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-mid);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.news-sidebar .side-list li::before { content: '›'; color: var(--primary); }

/* FAQ */
.faq-section { background: var(--bg-base); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-hi);
  font-weight: 500;
  transition: color .2s;
  width: 100%;
  background: none;
  text-align: left;
}
.faq-question:hover { color: var(--primary); }
.faq-question .faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  color: var(--text-mid);
  transition: transform .2s, background .2s, color .2s;
  flex-shrink: 0;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #1A1405;
  border-color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
}
.faq-answer p {
  padding: 0 0 22px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.8;
}

/* CTA */
.cta-section {
  background: linear-gradient(rgba(14,19,17,0.85), rgba(14,19,17,0.9)), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  padding: 80px 0;
  text-align: center;
}
.cta-section h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  color: var(--text-hi);
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 15px;
  color: var(--text-mid);
  margin-bottom: 28px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .btn { padding: 0 40px; height: 52px; }

/* Footer */
.site-footer {
  background: #0A0E0C;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}
.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr;
  gap: 48px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .footer-logo i {
  width: 36px; height: 36px;
  background: var(--primary-soft);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 15px;
}
.footer-brand .footer-logo .logo-text {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-hi);
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-low);
  line-height: 1.8;
}
.footer-col h4 {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--text-hi);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 13px;
  color: var(--text-mid);
  transition: color .2s, padding-left .2s;
}
.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-contact li {
  font-size: 13px;
  color: var(--text-mid);
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  align-items: flex-start;
}
.footer-contact li i { color: var(--primary); margin-top: 4px; width: 14px; }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 32px;
  border-top: 1px solid var(--border);
  margin-top: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-low);
}
.footer-bottom .icp { color: var(--text-low); }

/* Responsive */
@media (max-width: 1200px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .app-main { margin-left: 250px; }
}

@media (max-width: 1024px) {
  .app-sidebar { transform: translateX(-250px); }
  .app-sidebar.open { transform: translateX(0); }
  .sidebar-overlay.show { display: block; }
  .mobile-header { display: flex; }
  .app-main { margin-left: 0; }
  .app-main main { padding-top: 60px; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; padding-top: 90px; }
  .hero-left h1 { font-size: 38px; }
  .hero-card { max-width: 480px; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 20px auto 0; }
  .news-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-space: 56px; }
  .container { padding: 0 20px; }
  .section-head h2 { font-size: 28px; }
  .hero-content { padding-left: 20px; padding-right: 20px; }
  .hero-stats { padding-left: 20px; padding-right: 20px; gap: 20px; flex-wrap: wrap; }
  .hero-stats .stat .num { font-size: 24px; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }
  .feature-grid { gap: 16px; }
  .scenario-card .scenario-content { padding: 24px; }
  .scenario-card { min-height: 180px; }
  .testimonials-top { flex-direction: column; align-items: flex-start; }
  .testimonials-cards { grid-template-columns: 1fr; }
  .news-list .news-item { flex-direction: column; align-items: flex-start; gap: 4px; }
  .news-list .news-item .news-date { font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section { padding: 56px 20px; }
}

@media (max-width: 520px) {
  .hero-left h1 { font-size: 30px; }
  .section-head h2 { font-size: 24px; }
  .feature-grid { grid-template-columns: 1fr; }
  .mobile-header .mobile-logo { font-size: 13px; }
  .btn, .cta-section .btn { padding: 0 20px; font-size: 13px; }
}

/* Skeleton loading for images */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.feature-cover img, .hero-card img, .scenario-card .scenario-bg {
  background: var(--bg-hover);
  background-image: linear-gradient(90deg, var(--bg-hover) 25%, rgba(255,255,255,0.04) 40%, var(--bg-hover) 65%);
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

html.dark, body { background: var(--bg-base); }