/* ========== FutureBird ENW 官网 - 微信绿风格 · Premium Edition ========== */

:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #10b981;
  --green-700: #059669;
  --green-800: #047857;
  --green-900: #065f46;
  --wechat: #07C160;
  --wechat-dark: #06AD56;
  --wechat-light: #39D273;

  --bg-primary: #080c0a;
  --bg-secondary: #0c1210;
  --bg-card: #111a16;
  --bg-card-hover: #172420;
  --bg-elevated: #1a2d24;
  --text-primary: #eaf5ef;
  --text-secondary: #9bb8aa;
  --text-muted: #5a7d6c;
  --border-color: #1b3328;
  --border-subtle: #152a21;
  --glow-green: rgba(7,193,96,0.15);

  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;

  /* SVG Icon System */
  --icon-size: 20px;
  --icon-size-lg: 28px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 30px rgba(7,193,96,0.12);
}

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

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ===== SVG Icon System ===== */
.icon {
  display: inline-block;
  vertical-align: middle;
  width: var(--icon-size);
  height: var(--icon-size);
  color: currentColor;
  flex-shrink: 0;
}
.icon-lg {
  width: var(--icon-size-lg);
  height: var(--icon-size-lg);
}
.icon-stroke {
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

/* Icon containers */
.why-icon, .wb-icon, .mg-icon, .ts-logo, .rmm-icon,
.sc-icon, .ac-icon, .phil-icon, .os-feat-icon,
.sf-icon, .nc-icon, .mf-icon, .arch-icon, .oc-icon,
.choose-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--wechat);
}
.why-icon svg, .wb-icon svg, .mg-icon svg,
.sc-icon svg, .ac-icon svg, .phil-icon svg,
.os-feat-icon svg, .sf-icon svg, .nc-icon svg,
.mf-icon svg, .arch-icon svg, .oc-icon svg,
.choose-icon svg {
  width: 32px;
  height: 32px;
}
.ts-logo svg {
  width: 40px;
  height: 40px;
}
.rmm-icon svg {
  width: 28px;
  height: 28px;
}

/* Inline icons in headings */
h3 .icon, h2 .icon, h1 .icon {
  margin-right: 8px;
  vertical-align: -3px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 24px; border-radius: 10px; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: var(--transition); text-decoration: none; border: none;
  font-family: var(--font-sans); position: relative; overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--wechat), var(--wechat-dark));
  color: #fff;
  box-shadow: 0 0 20px rgba(7,193,96,0.2), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--wechat-light), var(--wechat));
  box-shadow: 0 0 40px rgba(7,193,96,0.35), inset 0 1px 0 rgba(255,255,255,0.15);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}
.btn-outline {
  background: transparent; color: var(--wechat); border: 1.5px solid rgba(7,193,96,0.4);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(7,193,96,0.08); border-color: var(--wechat);
  box-shadow: var(--shadow-glow);
}
.btn-ghost {
  background: transparent; color: var(--text-secondary); border: 1.5px solid var(--border-color);
}
.btn-ghost:hover { border-color: rgba(7,193,96,0.4); color: var(--wechat); }
.btn-lg { padding: 14px 36px; font-size: 16px; border-radius: 14px; letter-spacing: 0.3px; }
.btn-block { width: 100%; }

/* CTA Demo Button */
.btn-demo {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: var(--wechat); border: 1.5px solid rgba(7,193,96,0.3);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(7,193,96,0.1);
}
.btn-demo:hover {
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  border-color: var(--wechat);
  box-shadow: 0 0 40px rgba(7,193,96,0.25), var(--shadow-md);
  transform: translateY(-2px);
  color: var(--wechat-light);
}
.btn-demo svg { flex-shrink: 0; }

.gradient-text {
  background: linear-gradient(135deg, var(--wechat-light), var(--wechat), var(--green-700));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 9999998;
  padding: 16px 0; transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(8,12,10,0.88); backdrop-filter: blur(24px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle); padding: 10px 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.navbar-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text-primary); }
.logo-img { width: 28px; height: 28px; border-radius: 6px; object-fit: contain; }
.logo-icon { font-size: 28px; }
.logo-text { font-size: 20px; font-weight: 700; letter-spacing: -0.5px; }
.logo-accent { color: var(--wechat); }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--wechat); border-radius: 1px; transition: var(--transition);
}
.nav-links a:hover { color: var(--wechat); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--wechat); }
.nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; gap: 12px; }
.mobile-toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: none;
  cursor: pointer; padding: 4px;
}
.mobile-toggle span {
  display: block; width: 22px; height: 2px; background: var(--text-secondary);
  border-radius: 2px; transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 148px 0 80px; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; pointer-events: none;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(7,193,96,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7,193,96,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 70%);
}
.hero-glow {
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 700px;
  background: radial-gradient(ellipse, rgba(7,193,96,0.1) 0%, transparent 70%);
}
.hero-content { position: relative; text-align: center; z-index: 1; }
.hero-badge {
  display: inline-block; padding: 6px 20px; border-radius: 30px;
  background: rgba(7,193,96,0.08); border: 1px solid rgba(7,193,96,0.2);
  color: var(--wechat); font-size: 14px; font-weight: 500;
  margin-bottom: 28px; backdrop-filter: blur(8px);
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px); font-weight: 900; line-height: 1.15;
  letter-spacing: -1.5px; margin-bottom: 24px;
}
.hero-desc {
  font-size: 18px; color: var(--text-secondary); line-height: 1.7;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap;
  padding: 24px 40px; border-radius: var(--radius-xl);
  background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
}
.hero-stats .stat { text-align: center; }
.hero-stats .stat strong {
  display: block; font-size: 24px; font-weight: 700; color: var(--wechat);
}
.hero-stats .stat span { font-size: 13px; color: var(--text-muted); }
.stat-divider { width: 1px; height: 36px; background: var(--border-color); }

/* ===== Sections ===== */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: rgba(7,193,96,0.06); color: var(--wechat);
  font-size: 13px; font-weight: 600; letter-spacing: 0.5px;
  margin-bottom: 16px; border: 1px solid rgba(7,193,96,0.12);
}
.section-header h2 {
  font-size: clamp(28px, 4vw, 42px); font-weight: 800;
  letter-spacing: -1px; margin-bottom: 16px;
}
.section-header p { font-size: 17px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

/* ===== Features ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  padding: 32px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--icon-color, var(--wechat)), transparent);
  opacity: 0; transition: var(--transition);
}
.feature-card:hover {
  border-color: rgba(7,193,96,0.3); background: var(--bg-card-hover);
  transform: translateY(-4px); box-shadow: var(--shadow-md);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 48px; height: 48px; border-radius: 12px; display: flex;
  align-items: center; justify-content: center; margin-bottom: 20px;
  background: rgba(7,193,96,0.08);
}
.feature-icon svg { width: 24px; height: 24px; stroke: var(--icon-color, var(--wechat)); }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Scenarios ===== */
.scenarios { background: var(--bg-secondary); }
.scenario-tabs {
  display: flex; gap: 4px; justify-content: center; margin-bottom: 48px;
  background: var(--bg-card); border-radius: 12px; padding: 4px;
  display: inline-flex; margin-left: auto; margin-right: auto;
  border: 1px solid var(--border-color);
}
.tab-center { text-align: center; margin-bottom: 48px; }
.tab-btn {
  padding: 10px 24px; border-radius: 10px; border: none; background: transparent;
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  cursor: pointer; transition: var(--transition); font-family: var(--font-sans);
}
.tab-btn.active { background: var(--wechat); color: #fff; }
.tab-btn:hover:not(.active) { color: var(--wechat); }

.scenario-panels { position: relative; }
.scenario-panel { display: none; animation: fadeIn 0.3s ease; }
.scenario-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.scenario-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.scenario-badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: rgba(7,193,96,0.1); color: var(--wechat);
  font-size: 12px; font-weight: 600; margin-bottom: 16px;
}
.scenario-info h3 { font-size: 28px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.scenario-info > p { color: var(--text-secondary); margin-bottom: 24px; line-height: 1.7; }
.scenario-list { list-style: none; }
.scenario-list li {
  display: flex; align-items: center; gap: 10px; padding: 8px 0;
  font-size: 14px; color: var(--text-secondary);
}
.scenario-list svg { width: 18px; height: 18px; flex-shrink: 0; }

/* Mock browser */
.mock-saas {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-color); background: var(--bg-card);
}
.mock-header {
  display: flex; align-items: center; gap: 6px; padding: 12px 16px;
  background: rgba(255,255,255,0.02); border-bottom: 1px solid var(--border-subtle);
}
.mock-dot { width: 10px; height: 10px; border-radius: 50%; }
.mock-url { font-size: 12px; color: var(--text-muted); margin-left: 12px; }
.mock-body { padding: 24px; min-height: 220px; }
.saas-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mock-card {
  padding: 20px; border-radius: 12px; background: rgba(7,193,96,0.04);
  border: 1px solid rgba(7,193,96,0.1); text-align: center;
}
.mock-card.tenant span { display: block; font-weight: 600; font-size: 15px; margin-bottom: 4px; }
.mock-card.tenant small { color: var(--text-muted); font-size: 12px; }
.mock-card.add {
  border-style: dashed; color: var(--text-muted); font-size: 14px;
  display: flex; align-items: center; justify-content: center; min-height: 72px;
}

/* Enterprise view mock */
.enterprise-view { display: flex; gap: 16px; }
.mock-sidebar { display: flex; flex-direction: column; gap: 8px; min-width: 120px; }
.mock-tab {
  padding: 8px 14px; border-radius: 8px; font-size: 13px;
  color: var(--text-muted); background: transparent;
}
.mock-tab.active { background: rgba(7,193,96,0.1); color: var(--wechat); font-weight: 600; }
.mock-main { flex: 1; }
.mock-nav-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mock-item {
  padding: 12px; border-radius: 8px; background: rgba(7,193,96,0.04);
  border: 1px solid rgba(7,193,96,0.08); font-size: 13px; text-align: center;
  color: var(--text-secondary);
}

/* Deploy flow */
.deploy-flow {
  display: flex; align-items: center; justify-content: center; gap: 20px;
  padding: 40px; background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border-color); flex-wrap: wrap;
}
.deploy-step { text-align: center; }
.deploy-icon { font-size: 36px; margin-bottom: 8px; }
.deploy-label { font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.deploy-arrow { font-size: 20px; color: var(--wechat); }

/* ===== Architecture ===== */
.arch-diagram { max-width: 900px; margin: 0 auto; }
.arch-level {
  display: flex; gap: 20px; justify-content: center; flex-wrap: wrap;
}
.arch-level[data-level="1"] .arch-card { background: linear-gradient(135deg, rgba(7,193,96,0.12), rgba(7,193,96,0.04)); border-color: rgba(7,193,96,0.25); }
.arch-level[data-level="2"] .arch-card { background: linear-gradient(135deg, rgba(7,193,96,0.08), rgba(7,193,96,0.02)); border-color: rgba(7,193,96,0.18); }
.arch-level[data-level="3"] .arch-card { background: linear-gradient(135deg, rgba(7,193,96,0.06), rgba(7,193,96,0.015)); border-color: rgba(7,193,96,0.12); }
.arch-level[data-level="4"] .arch-card { background: linear-gradient(135deg, rgba(7,193,96,0.03), rgba(7,193,96,0.008)); border-color: rgba(7,193,96,0.08); }

.arch-card {
  padding: 24px; border-radius: var(--radius); text-align: center;
  border: 1px solid var(--border-color); min-width: 180px; flex: 1; max-width: 260px;
  transition: var(--transition);
}
.arch-card:hover { transform: translateY(-4px); border-color: rgba(7,193,96,0.35); box-shadow: var(--shadow-glow); }
.arch-icon { font-size: 28px; margin-bottom: 8px; }
.arch-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.arch-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }
.arch-connector { text-align: center; padding: 16px 0; }
.arch-line { width: 2px; height: 24px; background: linear-gradient(to bottom, var(--wechat), transparent); margin: 0 auto; }

/* ===== Highlights ===== */
.highlights { background: var(--bg-secondary); }
.highlights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.highlight-card {
  padding: 32px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
  position: relative;
}
.highlight-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.highlight-number {
  font-size: 48px; font-weight: 900; color: rgba(7,193,96,0.08);
  line-height: 1; margin-bottom: 16px;
}
.highlight-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.highlight-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Pricing ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: start; }
.pricing-card {
  padding: 36px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
  position: relative;
}
.pricing-card:hover { border-color: rgba(7,193,96,0.3); box-shadow: var(--shadow-md); }
.pricing-card.popular {
  border-color: var(--wechat); background: linear-gradient(180deg, rgba(7,193,96,0.06), var(--bg-card));
  transform: scale(1.03);
  box-shadow: var(--shadow-glow);
}
.popular-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  padding: 4px 16px; border-radius: 20px; background: linear-gradient(135deg, var(--wechat), var(--wechat-dark));
  color: #fff; font-size: 12px; font-weight: 600;
  box-shadow: 0 4px 12px rgba(7,193,96,0.3);
}
.pricing-header { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.pricing-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.pricing-price { font-size: 36px; font-weight: 900; color: var(--wechat); }
.pricing-price span { font-size: 16px; font-weight: 400; color: var(--text-muted); }
.pricing-features { list-style: none; margin-bottom: 28px; }
.pricing-features li { padding: 8px 0; font-size: 14px; color: var(--text-secondary); }
.pricing-features li.disabled { color: var(--text-muted); text-decoration: line-through; }

/* ===== FAQ ===== */
.faq { background: var(--bg-secondary); }
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border-subtle); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; background: none; border: none; color: var(--text-primary);
  font-size: 16px; font-weight: 600; cursor: pointer; text-align: left;
  font-family: var(--font-sans); transition: var(--transition);
}
.faq-question:hover { color: var(--wechat); }
.faq-question svg { width: 20px; height: 20px; flex-shrink: 0; transition: var(--transition); color: var(--text-muted); }
.faq-item.open .faq-question svg { transform: rotate(180deg); color: var(--wechat); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding-bottom: 20px; color: var(--text-secondary); font-size: 14px; line-height: 1.8; }

/* ===== Contact ===== */
.contact-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  padding: 60px; border-radius: var(--radius-xl);
  background: var(--bg-card); border: 1px solid var(--border-color);
  position: relative; overflow: hidden; align-items: center;
}
.contact-inner::before {
  content: ''; position: absolute; top: -100px; right: -100px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(7,193,96,0.06), transparent 70%);
  pointer-events: none;
}
.contact-info h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.contact-info > p { color: var(--text-secondary); margin-bottom: 28px; line-height: 1.7; }
.contact-details { display: flex; flex-direction: column; gap: 20px; }
.cd-item {
  display: flex; align-items: center; gap: 16px; padding: 16px 20px;
  border-radius: 12px; background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
  transition: var(--transition);
}
.cd-item:hover { border-color: rgba(7,193,96,0.2); }
.cd-icon { font-size: 24px; flex-shrink: 0; }
.cd-item strong { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 2px; }
.cd-item span, .cd-item a { font-size: 16px; color: var(--text-primary); }
.cd-item a { text-decoration: none; color: var(--wechat); transition: var(--transition); }
.cd-item a:hover { text-decoration: underline; }

.contact-qr {
  text-align: center; display: flex; flex-direction: column; align-items: center;
  position: relative; z-index: 1;
}
.contact-qr img {
  width: 240px; height: 240px; border-radius: var(--radius);
  border: 2px solid var(--border-color); object-fit: cover; margin-bottom: 16px;
}
.contact-qr p { font-size: 14px; color: var(--text-muted); }

/* ===== Footer ===== */
.footer { padding: 60px 0 0; border-top: 1px solid var(--border-subtle); }
.footer-inner { display: flex; justify-content: space-between; gap: 60px; margin-bottom: 40px; }
.footer-brand .logo-text { font-size: 18px; vertical-align: middle; }
.footer-brand .logo-img { vertical-align: middle; }
.footer-brand p { margin-top: 12px; font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.footer-links { display: flex; gap: 60px; }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }
.footer-col a { display: block; font-size: 13px; color: var(--text-muted); text-decoration: none; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--wechat); }
.footer-bottom { padding: 20px 0; border-top: 1px solid var(--border-subtle); text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-beian { margin-top: 6px; font-size: 12px !important; }
.footer-beian a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.footer-beian a:hover { color: var(--wechat); }

/* ===== Why Us ===== */
.why-us { background: var(--bg-secondary); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.why-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.why-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.why-card.main { grid-column: span 3; background: linear-gradient(135deg, rgba(7,193,96,0.06), var(--bg-card)); border-color: rgba(7,193,96,0.18); }
.why-icon { font-size: 36px; margin-bottom: 16px; }
.why-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.why-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.why-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.why-tags span {
  padding: 4px 12px; border-radius: 20px; font-size: 12px;
  background: rgba(7,193,96,0.06); color: var(--wechat);
  border: 1px solid rgba(7,193,96,0.12);
}

/* ===== Workbench ===== */
.wb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.wb-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.wb-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.wb-icon { font-size: 36px; margin-bottom: 16px; }
.wb-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.wb-card > p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.wb-list { list-style: none; }
.wb-list li { font-size: 13px; color: var(--text-muted); padding: 3px 0; }
.wb-cta { text-align: center; margin-top: 48px; }

/* ===== Management ===== */
.management { background: var(--bg-secondary); }
.mg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.mg-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.mg-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.mg-icon { font-size: 36px; margin-bottom: 16px; }
.mg-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.mg-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Pricing note */
.pricing-note { text-align: center; margin-top: 24px; }
.pricing-note p { font-size: 13px; color: var(--text-muted); }

/* Mobile bottom tab bar - hidden on desktop */
.mob-tabbar { display: none; }

/* Mobile-only components - hidden on desktop */
.mob-slider { display: none; }
.mob-tabs { display: none; }
.mob-tab-panel { display: none; }
.mob-pricing-card { display: none; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid, .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .pricing-card.popular { transform: scale(1); }
  .scenario-layout { grid-template-columns: 1fr; gap: 40px; }
  .scenario-visual { order: -1; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .arch-card { min-width: 140px; }
  .fd-layout { grid-template-columns: 1fr; }
  .fd-layout.reverse .fd-visual { order: -1; }
  .pricing-detailed { grid-template-columns: 1fr; }
  .pricing-detailed-4 { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: 1fr; }
  .cap-overview-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-overview-card.main { grid-column: span 2; }
  .numbers-grid { grid-template-columns: repeat(3, 1fr); }
  .flow-steps { grid-template-columns: 1fr; gap: 10px; }
  .capability-grid { grid-template-columns: 1fr; gap: 10px; }
  .tech-stack-grid { grid-template-columns: 1fr; gap: 12px; }
}

@media (max-width: 768px) {
  section { padding: 48px 0; }
  body { padding-bottom: 72px; }
  .container { padding: 0 16px; }

  /* ===== Mobile top nav: LOGO centered ===== */
  .navbar { padding: 8px 0; position: fixed; }
  .navbar.scrolled { padding: 6px 0; background: rgba(8,12,10,0.95); }
  .navbar-inner { display: flex; justify-content: center; align-items: center; }
  .logo { display: flex; align-items: center; justify-content: center; margin: 0 auto; gap: 6px; float: none; }
  .logo-img { width: 24px; height: 24px; }
  .logo-text { font-size: 16px; white-space: nowrap; }
  .nav-links, .nav-actions, .mobile-toggle { display: none !important; }

  /* ===== Mobile Bottom Tab Bar - Compact Style ===== */
  .mob-tabbar {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
    background: rgba(8,12,10,0.96); backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-subtle);
    box-shadow: 0 -2px 12px rgba(0,0,0,0.2);
    padding: 4px 0 env(safe-area-inset-bottom, 0); justify-content: space-around; align-items: center;
    height: 50px;
  }
  .mob-tabbar::before {
    content: ''; position: absolute; top: -1px; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(7,193,96,0.2), transparent);
  }
  .mob-tabbar-item {
    display: flex; flex-direction: column; align-items: center; gap: 1px;
    padding: 4px 0; text-decoration: none; color: var(--text-muted);
    font-size: 9px; font-weight: 500; transition: var(--transition);
    min-width: 0; position: relative; flex: 1;
  }
  .mob-tabbar-item svg {
    width: 18px; height: 18px; stroke-width: 1.8; transition: var(--transition);
  }
  .mob-tabbar-item.active { color: var(--wechat); }
  .mob-tabbar-item.active svg { stroke: var(--wechat); }
  .mob-tabbar-item:active { transform: scale(0.92); }
  .mob-tabbar-label { white-space: nowrap; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; max-width: 48px; }

  /* Center item (场景) - same compact style as others */
  .mob-tabbar-center {
    display: flex; flex-direction: column; align-items: center; gap: 1px;
    padding: 4px 0; text-decoration: none; color: var(--text-muted);
    font-size: 9px; font-weight: 500; transition: var(--transition);
    min-width: 0; position: relative; flex: 1;
  }
  .mob-tabbar-center svg { width: 18px; height: 18px; stroke-width: 1.8; transition: var(--transition); }
  .mob-tabbar-center.active { color: var(--wechat); }
  .mob-tabbar-center.active svg { stroke: var(--wechat); }
  .mob-tabbar-center:active { transform: scale(0.92); }
  .mob-tabbar-center .mob-tabbar-label {
    color: var(--text-muted); font-size: 9px; font-weight: 500;
    white-space: nowrap; line-height: 1.2;
  }
  .mob-tabbar-center.active .mob-tabbar-label { color: var(--wechat); }

  /* ===== Mobile Section Tabs (compact switcher) ===== */
  .mob-tabs { display: flex; gap: 0; margin-bottom: 16px; }
  .mob-tab-btn {
    flex: 1; padding: 10px 8px; border: none; background: var(--bg-card);
    color: var(--text-muted); font-size: 13px; font-weight: 600;
    cursor: pointer; transition: var(--transition); font-family: var(--font-sans);
    border-bottom: 2px solid var(--border-subtle); white-space: nowrap;
    text-align: center;
  }
  .mob-tab-btn:first-child { border-radius: 8px 0 0 0; }
  .mob-tab-btn:last-child { border-radius: 0 8px 0 0; }
  .mob-tab-btn.active {
    color: var(--wechat); border-bottom-color: var(--wechat);
    background: rgba(7,193,96,0.05);
  }
  .mob-tab-panel { display: none; animation: mobFadeIn 0.3s ease; }
  .mob-tab-panel.active { display: block; }
  @keyframes mobFadeIn { from { opacity: 0; transform: translateX(8px); } to { opacity: 1; transform: translateX(0); } }

  /* ===== Mobile Slider / Carousel ===== */
  .mob-slider { display: block; position: relative; overflow: hidden; }
  .mob-slider-track {
    display: flex; transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    touch-action: pan-y; user-select: none; align-items: stretch;
  }
  .mob-slider-slide {
    min-width: 100%; flex-shrink: 0; padding: 0; display: flex;
  }
  .mob-slider-slide > * {
    width: 100%; display: flex; flex-direction: column; flex: 1;
  }
  .mob-slider-slide .why-card,
  .mob-slider-slide .wb-card,
  .mob-slider-slide .mg-card,
  .mob-slider-slide .scompare-card { padding: 24px 20px; flex: 1; }
  .mob-slider-slide .rm-module { padding: 16px; flex: 1; }
  .mob-slider-slide .os-feat-card { padding: 16px; flex: 1; }
  .mob-slider-slide .os-iter-card { padding: 16px; flex: 1; }
  .mob-slider-slide .cap-overview-card { padding: 16px; flex: 1; }
  .mob-slider-slide .cap-overview-card.main { padding: 16px; flex: 1; }
  .mob-slider-slide .mf-item { padding: 14px; flex: 1; }
  .mob-slider-slide .tech-item { padding: 12px; flex: 1; }
  .mob-slider-dots {
    display: flex; justify-content: center; gap: 6px; margin-top: 16px;
  }
  .mob-slider-dot {
    width: 6px; height: 6px; border-radius: 50%; background: var(--border-color);
    border: none; cursor: pointer; transition: var(--transition); padding: 0;
  }
  .mob-slider-dot.active { background: var(--wechat); width: 18px; border-radius: 3px; }
  .mob-slider-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 28px; height: 28px; border-radius: 50%;
    background: rgba(7,193,96,0.15); border: 1px solid rgba(7,193,96,0.2);
    color: var(--wechat); display: flex; align-items: center; justify-content: center;
    cursor: pointer; transition: var(--transition); z-index: 2;
  }
  .mob-slider-nav:hover { background: rgba(7,193,96,0.25); }
  .mob-slider-nav.prev { left: 2px; }
  .mob-slider-nav.next { right: 2px; }
  .mob-slider-nav svg { width: 16px; height: 16px; stroke: currentColor; stroke-width: 2; fill: none; }

  /* Desktop grid hidden on mobile when slider/tabs used */
  .mob-has-slider > .wb-grid,
  .mob-has-slider > .mg-grid,
  .mob-has-slider > .why-grid,
  .mob-has-slider > .pricing-grid,
  .mob-has-slider > .pricing-grid-4,
  .mob-has-slider > .mf-grid,
  .mob-has-slider > .rm-module-grid,
  .mob-has-slider > .os-iter-grid,
  .mob-has-slider > .os-feat-grid,
  .mob-has-slider > .tech-stack-grid,
  .mob-has-slider > .cap-overview-grid,
  .mob-has-slider > .tech-grid,
  .mob-has-slider > .scompare-grid,
  .mob-has-slider > .pricing-detailed,
  .mob-has-slider > .pricing-detailed-4,
  .mob-has-slider > .container > .wb-grid,
  .mob-has-slider > .container > .mg-grid,
  .mob-has-slider > .container > .why-grid,
  .mob-has-slider > .container > .pricing-grid,
  .mob-has-slider > .container > .pricing-grid-4,
  .mob-has-slider > .container > .mf-grid,
  .mob-has-slider > .container > .rm-module-grid,
  .mob-has-slider > .container > .os-iter-grid,
  .mob-has-slider > .container > .os-feat-grid,
  .mob-has-slider > .container > .tech-stack-grid,
  .mob-has-slider > .container > .cap-overview-grid,
  .mob-has-slider > .container > .tech-grid,
  .mob-has-slider > .container > .scompare-grid,
  .mob-has-slider > .container > .pricing-detailed,
  .mob-has-slider > .container > .pricing-detailed-4 { display: none; }

  /* Mobile: show desktop grid as vertical stack instead of slider for content-heavy sections */
  .why-us.mob-has-slider .why-grid,
  .workbench.mob-has-slider .wb-grid,
  .management.mob-has-slider .mg-grid {
    display: flex !important; flex-direction: column; gap: 12px;
  }
  .why-us.mob-has-slider .mob-slider,
  .workbench.mob-has-slider .mob-slider,
  .management.mob-has-slider .mob-slider { display: none; }

  /* Slider card content - simplified for mobile readability */
  .mob-slider-slide .why-tags,
  .mob-slider-slide .coc-tags,
  .mob-slider-slide .os-feat-tags { flex-wrap: wrap; gap: 6px; margin-top: 12px; justify-content: center; }
  .mob-slider-slide .why-tags span,
  .mob-slider-slide .coc-tags span,
  .mob-slider-slide .os-feat-tags span { font-size: 11px; padding: 3px 10px; }
  .mob-slider-slide .wb-list { display: none; }
  .mob-slider-slide .wb-card > p { margin-bottom: 0; font-size: 13px; line-height: 1.6; }
  .mob-slider-slide .why-card p { font-size: 13px; line-height: 1.6; }
  .mob-slider-slide .mg-card p { font-size: 13px; line-height: 1.6; }
  .mob-slider-slide .scompare-card .sc-list { display: none; }
  .mob-slider-slide .scompare-card .btn { margin-top: 12px; }

  /* ===== Mobile Compact Cards ===== */
  .wb-card, .mg-card, .why-card:not(.main), .feature-card, .highlight-card,
  .os-feat-card:not(.large), .mf-item, .cap-card, .flow-step, .scompare-card,
  .rm-module, .os-iter-card, .milestone, .cap-overview-card:not(.main), .value-card,
  .ts-card {
    padding: 14px; border-radius: var(--radius);
  }
  .why-card.main { padding: 18px; border-radius: var(--radius); }

  /* T2: Card icon + title on one line, centered */
  .wb-card, .mg-card, .why-card, .feature-card, .cap-overview-card, .value-card,
  .os-feat-card, .scompare-card, .rm-module, .os-iter-card {
    text-align: center;
  }
  .wb-icon, .mg-icon, .why-icon, .coc-icon, .value-icon, .oi-icon, .sf-icon,
  .os-feat-icon, .sc-icon, .rmm-icon, .ts-logo {
    font-size: 20px; margin-bottom: 0; margin-right: 6px; display: inline; vertical-align: middle;
  }
  .feature-icon {
    width: auto; height: auto; padding: 0; margin-bottom: 0; margin-right: 6px;
    display: inline-flex; vertical-align: middle; background: none; border-radius: 0;
  }
  .feature-icon svg { width: 20px; height: 20px; }
  .wb-card h3, .mg-card h3, .why-card h3, .feature-card h3, .cap-overview-card h3, .value-card h3,
  .os-feat-card h3, .scompare-card h3, .rmm-header h3, .os-iter-card h3, .ts-card h3 {
    font-size: 15px; margin-bottom: 4px; display: inline; vertical-align: middle;
  }
  .rmm-header { display: flex; align-items: center; justify-content: center; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
  .rmm-header .rmm-icon { font-size: 20px; flex-shrink: 0; }
  .rmm-header .rmm-badge { margin-bottom: 0; }
  .wb-card > p, .mg-card p, .why-card p, .feature-card p, .scompare-card p { font-size: 13px; line-height: 1.5; text-align: left; }
  .wb-list li { font-size: 12px; padding: 2px 0; }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 22px; }
  .section-header p { font-size: 14px; }

  /* Mobile pricing tab panel card */
  .mob-pricing-card {
    display: block; padding: 24px 20px; border-radius: var(--radius); background: var(--bg-card);
    border: 1px solid var(--border-color); text-align: center;
  }
  .mob-pricing-card.popular { border-color: var(--wechat); background: linear-gradient(180deg, rgba(7,193,96,0.06), var(--bg-card)); }
  .mob-pricing-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
  .mob-pricing-card .mp-price { font-size: 28px; font-weight: 900; color: var(--wechat); margin-bottom: 4px; }
  .mob-pricing-card .mp-price span { font-size: 13px; font-weight: 400; color: var(--text-muted); }
  .mob-pricing-card .mp-desc { color: var(--text-muted); font-size: 13px; margin-bottom: 12px; }
  .mob-pricing-card .mp-badge {
    display: inline-block; padding: 2px 12px; border-radius: 12px;
    background: linear-gradient(135deg, var(--wechat), var(--wechat-dark));
    color: #fff; font-size: 11px; font-weight: 600; margin-bottom: 12px;
  }
  .mob-pricing-card ul { list-style: none; text-align: left; margin: 12px 0; }
  .mob-pricing-card li { padding: 5px 0; font-size: 13px; color: var(--text-secondary); }
  .mob-pricing-card li.disabled { color: var(--text-muted); text-decoration: line-through; }

  /* ===== Layout Fixes ===== */
  .features-grid, .highlights-grid, .pricing-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 128px 0 60px; }
  .hero h1 { font-size: 26px; letter-spacing: -0.5px; }
  .hero-desc { font-size: 14px; margin-bottom: 24px; }
  .hero-actions { gap: 10px; margin-bottom: 32px; }
  .hero-actions .btn-lg { padding: 10px 20px; font-size: 14px; }
  .hero-badge { font-size: 12px; padding: 4px 14px; margin-bottom: 16px; }
  .hero-stats { flex-direction: row; flex-wrap: wrap; gap: 8px; padding: 14px 20px; }
  .hero-stats .stat { min-width: 0; flex: 1; }
  .hero-stats .stat strong { font-size: 16px; }
  .hero-stats .stat span { font-size: 11px; }
  .stat-divider { display: none; }
  .arch-level { flex-direction: column; align-items: center; }
  .deploy-flow { flex-direction: column; }
  .deploy-arrow { transform: rotate(90deg); }
  .footer-inner { flex-direction: column; gap: 24px; }
  .footer-links { gap: 24px; flex-wrap: wrap; }
  .enterprise-view { flex-direction: column; }
  .mock-nav-grid { grid-template-columns: repeat(2, 1fr); }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .num-card { padding: 16px 10px; }
  .num-card strong { font-size: 22px; }
  .pricing-detailed-4 { grid-template-columns: 1fr; }

  /* Page hero fixes */
  .page-hero { padding: 100px 0 40px; }
  .page-hero h1 { font-size: 24px; }
  .page-hero p { font-size: 14px; }

  /* Contact fix */
  .contact-inner { grid-template-columns: 1fr; padding: 24px; gap: 24px; }
  .contact-qr img { width: 160px; height: 160px; }
  .contact-info h2 { font-size: 22px; }

  /* Sub page fixes */
  .fd-layout { grid-template-columns: 1fr !important; gap: 16px; width: 100%; }
  .fd-layout .fd-info { width: 100%; max-width: 100%; }
  .fd-layout.reverse .fd-info { order: 0; }
  .fd-layout .fd-visual { display: none !important; }
  .fd-number { font-size: 36px; margin-bottom: 8px; }
  .fd-info h2 { font-size: 20px; }
  .fd-lead { font-size: 14px; }
  .fd-info > p { font-size: 13px; line-height: 1.7; }
  .fd-specs { gap: 6px; }
  .fd-spec { padding: 10px 12px; }
  .fd-spec strong { min-width: 60px; font-size: 12px; }
  .fd-spec span { font-size: 12px; }
  .security-features { grid-template-columns: 1fr; gap: 8px; }
  .sf-item { padding: 12px; gap: 8px; text-align: left; }
  .oem-capabilities { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .oem-cap { padding: 8px 10px; font-size: 12px; }
  .compare-grid { grid-template-columns: 1fr; gap: 12px; }
  .perm-visual { padding: 16px; }
  .perm-bar { height: 24px; padding: 0 8px; }
  .perm-bar span { font-size: 11px; }
  .arch-visual-box { padding: 16px; }
  .avb-item { padding: 6px 10px; font-size: 11px; }
  .notif-visual { padding: 16px; }
  .mode-switch-visual { padding: 16px; }
  .fd-table { font-size: 12px; }
  .fd-table th, .fd-table td { padding: 6px 8px; font-size: 12px; }

  /* Pricing page compare table scroll */
  .compare-table-wrap { margin: 0 -16px; border-radius: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .compare-table { min-width: 600px; }
  .compare-table th, .compare-table td { white-space: nowrap; }
  .compare-table td:first-child { white-space: normal; min-width: 120px; }
  .pb-inner { padding: 14px 16px; flex-wrap: wrap; gap: 6px; }
  .pb-item { padding: 4px 10px; font-size: 12px; }

  /* Open source page fixes */
  .os-hero { padding: 128px 0 40px; }
  .os-hero h1 { font-size: 26px; }
  .os-quick-stats { flex-wrap: wrap; gap: 8px; padding: 14px 20px; }
  .os-quick-stats > div { min-width: 0; flex: 1 1 45%; }
  .os-quick-stats .divider { display: none; }

  /* CTA box fix */
  .cta-box { padding: 32px 20px; }
  .cta-box h2 { font-size: 22px; }
  .upgrade-box { flex-direction: column; padding: 24px; text-align: center; }
  .ub-content h2 { font-size: 22px; }

  /* About page fixes */
  .about-hero { padding: 100px 0 40px; }
  .about-hero h1 { font-size: 24px; }
  .story-grid { grid-template-columns: 1fr; gap: 32px; }
  .tech-grid { grid-template-columns: 1fr; }
  .cap-overview-grid { grid-template-columns: 1fr; }
  .cap-overview-card.main { grid-column: span 1; }
  .milestone { padding: 14px; gap: 10px; }
  .ms-year { min-width: 48px; height: 48px; font-size: 12px; border-radius: 8px; }
  .ms-text strong { font-size: 14px; }
  .ms-text p { font-size: 12px; }

  /* Scenario page fixes */
  .scenario-detail { padding: 48px 0; }
  .sd-hero h1 { font-size: 22px; }
  .sd-lead { font-size: 14px; }
  .sd-section h3 { font-size: 16px; text-align: center; }
  .sd-section > p { font-size: 13px; line-height: 1.7; }
  .scompare-grid { grid-template-columns: 1fr; gap: 12px; }
  .deploy-timeline { padding-left: 32px; }
  .dt-num { width: 28px; height: 28px; font-size: 12px; left: -32px; }
  .dt-line { left: -18px; }
  .dt-content strong { font-size: 14px; }
  .dt-content p { font-size: 12px; }
  .flow-steps { grid-template-columns: 1fr !important; gap: 10px; }
  .flow-step { padding: 14px 12px; text-align: center; }
  .flow-step strong { font-size: 14px; display: block; margin-bottom: 4px; }
  .flow-step p { font-size: 12px; line-height: 1.5; }
  .capability-grid { grid-template-columns: 1fr !important; gap: 10px; }
  .cap-card { padding: 14px 12px; text-align: left; }
  .cap-card strong { font-size: 14px; display: block; margin-bottom: 4px; text-align: center; }
  .cap-card p { font-size: 12px; line-height: 1.5; }

  /* T9: Open source tech-stack-grid fix - single column */
  .tech-stack-grid { grid-template-columns: 1fr !important; gap: 12px; }
  .ts-card { padding: 20px 16px; }
  .ts-card h3 { font-size: 16px; }
  .ts-card p { font-size: 13px; }
  .ts-exts { font-size: 11px; }

  /* T10: Roadmap rm-module-grid fix - single column for readability */
  .rm-module-grid { grid-template-columns: 1fr; gap: 12px; }
  .rm-module { padding: 16px 14px; }
  .rmm-header { margin-bottom: 10px; gap: 8px; }
  .rmm-icon { font-size: 24px; }
  .rmm-header h3 { font-size: 15px; }
  .rmm-badge { font-size: 10px; padding: 2px 8px; }
  .rmm-list li { font-size: 12px; gap: 6px; padding: 2px 0; }
  .rmm-list { gap: 2px; }

  /* Roadmap page fixes */
  .rm-phase { padding-left: 48px; }
  .rm-phase-num { width: 36px; height: 36px; font-size: 14px; }
  .rm-phase::before { left: 17px; }
  .rm-phase-body { padding: 16px; }
  .rm-phase-goal { font-size: 13px; }
  .rm-phase-info h3 { font-size: 16px; }
  .rmm-list li { font-size: 11px; gap: 4px; padding: 1px 0; }

  /* Quick start steps */
  .qs-steps { grid-template-columns: 1fr 1fr; gap: 12px; }
  .qs-num { width: 36px; height: 36px; font-size: 16px; margin-bottom: 8px; }
  .qs-content h4 { font-size: 14px; }
  .qs-content p { font-size: 12px; }
  .qs-code { font-size: 11px; padding: 8px 12px; word-break: break-all; }
  .req-grid { grid-template-columns: 1fr; gap: 8px; }
  .req-item { padding: 8px 12px; }
  .req-item strong { min-width: 60px; font-size: 12px; }
  .req-item span { font-size: 12px; }
  .ub-features { justify-content: center; gap: 6px; }
  .ub-features span { font-size: 11px; padding: 3px 10px; }
  .ub-action { flex-direction: column; }

  .compare-cta { grid-template-columns: 1fr; gap: 16px; }

  /* Footer mobile */
  .footer { padding: 40px 0 0; }
  .footer-brand { text-align: center; }
  .footer-brand .logo-text { font-size: 15px; }
  .footer-brand .logo-img { width: 24px; height: 24px; vertical-align: middle; }
  .footer-brand p { margin-top: 8px; }
}

/* ===== Roadmap Page ===== */
.roadmap-done { background: var(--bg-secondary); }
.rm-module-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.rm-module {
  padding: 24px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.rm-module:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.rmm-header { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
.rmm-icon { font-size: 28px; flex-shrink: 0; }
.rmm-header h3 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.rmm-badge {
  display: inline-block; padding: 2px 10px; border-radius: 12px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.5px;
}
.rmm-badge.done { background: rgba(7,193,96,0.12); color: var(--wechat); }
.rmm-badge.commercial { background: rgba(250,204,21,0.12); color: #facc15; }
.rmm-list { list-style: none; }
.rmm-list li { display: flex; align-items: center; gap: 8px; padding: 3px 0; font-size: 13px; color: var(--text-secondary); }
.rm-check { flex-shrink: 0; font-size: 12px; }
.rm-check.done { color: var(--wechat); }
.rm-check.commercial { color: #facc15; }
.rm-check.developing { color: #facc15; }
.rm-check.planned { color: var(--text-muted); }
.rm-check.future { color: var(--text-muted); }

/* Phase timeline */
.roadmap-plan { padding: 80px 0; }
.rm-timeline { max-width: 800px; margin: 0 auto; }
.rm-phase {
  position: relative; padding-left: 80px; margin-bottom: 32px;
}
.rm-phase::before {
  content: ''; position: absolute; left: 24px; top: 48px; bottom: -32px;
  width: 2px; background: var(--border-color);
}
.rm-phase:last-child::before { display: none; }
.rm-phase.current::before { background: linear-gradient(to bottom, var(--wechat), var(--border-color)); }
.rm-phase-header { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.rm-phase-num {
  position: absolute; left: 0; width: 50px; height: 50px; border-radius: 50%;
  background: var(--bg-card); border: 2px solid var(--border-color);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 20px; color: var(--text-muted); z-index: 1;
}
.rm-phase.current .rm-phase-num {
  background: var(--wechat); border-color: var(--wechat); color: #fff;
  box-shadow: 0 0 20px rgba(7,193,96,0.3);
}
.rm-phase-status {
  display: inline-block; padding: 2px 10px; border-radius: 12px;
  font-size: 11px; font-weight: 600; margin-bottom: 4px;
}
.rm-phase-status.developing { background: rgba(250,204,21,0.12); color: #facc15; }
.rm-phase-status.planned { background: rgba(107,114,128,0.12); color: #9ca3af; }
.rm-phase-status.future { background: rgba(107,114,128,0.08); color: #6b7280; }
.rm-phase-info h3 { font-size: 20px; font-weight: 700; margin-bottom: 2px; }
.rm-phase-time { font-size: 13px; color: var(--text-muted); }
.rm-phase-body {
  padding: 24px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color);
}
.rm-phase.current .rm-phase-body { border-color: rgba(7,193,96,0.3); }
.rm-phase-goal { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border-subtle); }

/* Open source iteration */
.roadmap-opensource { background: var(--bg-secondary); }
.os-iter-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.os-iter-card {
  padding: 24px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
  text-align: center;
}
.os-iter-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.oi-icon { font-size: 32px; margin-bottom: 12px; }
.os-iter-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.os-iter-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.os-iter-note { text-align: center; margin-top: 32px; }
.os-iter-note p { font-size: 13px; color: var(--text-muted); }

.roadmap-cta { padding: 80px 0; background: var(--bg-secondary); }

/* Roadmap responsive */
@media (max-width: 1024px) {
  .rm-module-grid { grid-template-columns: repeat(2, 1fr); }
  .os-iter-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Page Hero (sub pages) ===== */
.page-hero {
  padding: 168px 0 60px; text-align: center;
  border-bottom: 1px solid var(--border-subtle);
}
.page-hero h1 {
  font-size: clamp(28px, 5vw, 48px); font-weight: 900;
  letter-spacing: -1px; margin-bottom: 16px;
}
.page-hero p { font-size: 17px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

/* ===== Feature Detail Pages ===== */
.feat-section { padding: 40px 0 0; }
.feat-section-alt { background: var(--bg-secondary); }
.feat-section-header { text-align: center; margin-bottom: 48px; padding-top: 40px; }
.feature-detail { padding: 60px 0; }
.feature-detail.alt { background: var(--bg-secondary); }
.fd-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start;
}
.fd-layout.reverse .fd-info { order: 2; }
.fd-number {
  font-size: 72px; font-weight: 900; color: rgba(7,193,96,0.06);
  line-height: 1; margin-bottom: 16px;
}
.fd-info h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.fd-lead { font-size: 18px; color: var(--wechat); font-weight: 500; margin-bottom: 16px; }
.fd-info > p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }

/* Feature detail specs */
.fd-specs { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; }
.fd-spec {
  display: flex; align-items: center; gap: 16px; padding: 12px 16px;
  border-radius: 10px; background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
}
.fd-spec strong { min-width: 80px; color: var(--wechat); font-size: 14px; }
.fd-spec span { color: var(--text-secondary); font-size: 13px; }

/* Feature detail table */
.fd-table {
  width: 100%; border-collapse: collapse; margin-top: 24px;
  font-size: 14px;
}
.fd-table th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border-color); color: var(--text-muted); font-weight: 600; }
.fd-table td { padding: 10px 12px; border-bottom: 1px solid var(--border-subtle); color: var(--text-secondary); }

/* Role badges */
.role-badge {
  display: inline-block; padding: 2px 10px; border-radius: 6px;
  font-size: 12px; font-weight: 600;
}
.role-badge.admin { background: rgba(239,68,68,0.1); color: #f87171; }
.role-badge.platform { background: rgba(168,85,247,0.1); color: #c084fc; }
.role-badge.tenant { background: rgba(7,193,96,0.1); color: var(--wechat); }
.role-badge.dept { background: rgba(59,130,246,0.1); color: #60a5fa; }
.role-badge.emp { background: rgba(107,114,128,0.1); color: #9ca3af; }

/* Arch visual box */
.arch-visual-box {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-color);
  text-align: center;
}
.avb-level { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.avb-level.l1 { margin-bottom: 0; }
.avb-item {
  padding: 10px 16px; border-radius: 8px;
  background: rgba(7,193,96,0.04); border: 1px solid rgba(7,193,96,0.08);
  font-size: 13px; color: var(--text-secondary);
}
.avb-arrow { color: var(--wechat); font-size: 18px; padding: 8px 0; }

/* Permission visual */
.perm-visual { padding: 24px; border-radius: var(--radius-lg); background: var(--bg-card); border: 1px solid var(--border-color); }
.perm-row { display: flex; align-items: center; gap: 12px; padding: 12px 0; }
.perm-role { min-width: 80px; font-size: 13px; font-weight: 600; }
.perm-bar {
  height: 32px; border-radius: 6px; background: rgba(7,193,96,0.12);
  display: flex; align-items: center; padding: 0 12px;
}
.perm-bar span { font-size: 12px; color: var(--wechat); font-weight: 500; }

/* Compare grid */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.compare-card {
  padding: 20px; border-radius: 12px; background: rgba(7,193,96,0.03);
  border: 1px solid var(--border-subtle);
}
.compare-card h4 { font-size: 16px; margin-bottom: 12px; color: var(--wechat); }
.compare-card ul { list-style: none; }
.compare-card li { padding: 4px 0; font-size: 13px; color: var(--text-secondary); }

/* Mode switch visual */
.mode-switch-visual { padding: 32px; border-radius: var(--radius-lg); background: var(--bg-card); border: 1px solid var(--border-color); text-align: center; }
.ms-toggle {
  display: inline-flex; position: relative; background: var(--bg-primary);
  border-radius: 10px; padding: 4px; margin-bottom: 24px; border: 1px solid var(--border-color);
}
.ms-option {
  padding: 10px 24px; border-radius: 8px; position: relative; z-index: 1;
  font-size: 14px; font-weight: 500; cursor: pointer; transition: color 0.2s;
  color: var(--text-muted);
}
.ms-option.active { color: #fff; }
.ms-slider {
  position: absolute; top: 4px; left: 0; width: 50%; height: calc(100% - 8px);
  background: var(--wechat); border-radius: 8px; transition: left 0.3s ease;
}
.ms-content { display: flex; flex-direction: column; gap: 8px; }
.ms-item {
  padding: 12px 16px; border-radius: 8px; background: rgba(7,193,96,0.04);
  border: 1px solid rgba(7,193,96,0.08); font-size: 14px; color: var(--text-secondary);
  transition: var(--transition);
}
.ms-item:hover { border-color: rgba(7,193,96,0.2); }

/* Security features */
.security-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.sf-item {
  display: flex; align-items: flex-start; gap: 12px; padding: 16px;
  border-radius: 10px; background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
}
.sf-icon { font-size: 24px; }
.sf-item strong { display: block; font-size: 14px; margin-bottom: 4px; }
.sf-item small { color: var(--text-muted); font-size: 12px; }

/* Notification visual */
.notif-visual {
  padding: 32px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-color); text-align: center;
}
.nv-trigger { font-size: 18px; margin-bottom: 20px; color: var(--wechat); font-weight: 600; }
.nv-channels { display: flex; gap: 12px; justify-content: center; margin-bottom: 20px; flex-wrap: wrap; }
.nv-channel {
  padding: 10px 16px; border-radius: 8px;
  background: rgba(7,193,96,0.06); border: 1px solid rgba(7,193,96,0.12);
  font-size: 14px; color: var(--text-secondary);
}
.nv-types { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.nv-tag {
  padding: 4px 12px; border-radius: 20px; font-size: 12px;
  background: rgba(7,193,96,0.04); color: var(--text-muted); border: 1px solid var(--border-subtle);
}

/* OEM capabilities */
.oem-capabilities { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 24px; }
.oem-cap {
  padding: 10px 14px; border-radius: 8px; font-size: 13px;
  background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* More features grid */
.more-features { background: var(--bg-secondary); }
.mf-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.mf-item {
  padding: 20px; border-radius: 12px; background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.mf-item:hover { border-color: rgba(7,193,96,0.3); }
.mf-item strong { display: block; font-size: 15px; margin-bottom: 6px; }
.mf-item p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== Scenario Detail Pages ===== */
.scenario-detail { padding: 80px 0; }
.scenario-detail.alt { background: var(--bg-secondary); }
.sd-hero { margin-bottom: 48px; }
.sd-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 900; letter-spacing: -1px; margin-bottom: 16px; }
.sd-lead { font-size: 18px; color: var(--text-secondary); line-height: 1.7; }
.sd-section { margin-bottom: 48px; }
.sd-section h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; color: var(--wechat); }
.sd-section > p { color: var(--text-secondary); line-height: 1.8; }

/* Flow steps */
.flow-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.flow-step {
  padding: 20px; border-radius: 12px; background: var(--bg-card);
  border: 1px solid var(--border-color); text-align: center;
}
.flow-num {
  width: 36px; height: 36px; border-radius: 50%; background: var(--wechat);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px; margin-bottom: 12px;
}
.flow-step strong { display: block; font-size: 14px; margin-bottom: 6px; }
.flow-step p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

/* Capability grid */
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cap-card {
  padding: 20px; border-radius: 12px; background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.cap-card:hover { border-color: rgba(7,193,96,0.3); }
.cap-card strong { display: block; font-size: 15px; margin-bottom: 6px; color: var(--wechat); }
.cap-card p { font-size: 13px; color: var(--text-muted); }

/* Deploy timeline */
.deploy-timeline { position: relative; padding-left: 40px; }
.dt-step { position: relative; padding-bottom: 32px; }
.dt-step:last-child { padding-bottom: 0; }
.dt-num {
  position: absolute; left: -40px; width: 32px; height: 32px;
  border-radius: 50%; background: var(--wechat); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px;
}
.dt-line {
  position: absolute; left: -25px; top: 32px; width: 2px;
  height: calc(100% - 32px); background: var(--border-color);
}
.dt-step:last-child .dt-line { display: none; }
.dt-content strong { display: block; font-size: 16px; margin-bottom: 4px; }
.dt-content p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Scenario Compare ===== */
.scenario-compare { padding: 80px 0; background: var(--bg-secondary); }
.scompare-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scompare-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
  text-align: center;
}
.scompare-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.sc-icon { font-size: 36px; margin-bottom: 12px; }
.scompare-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.sc-price { font-size: 22px; font-weight: 800; color: var(--wechat); margin-bottom: 16px; }
.sc-list { list-style: none; text-align: left; margin-bottom: 20px; }
.sc-list li { padding: 5px 0; font-size: 13px; color: var(--text-secondary); }
.sc-list li.disabled { color: var(--text-muted); }

/* ===== Pricing Page ===== */
.pricing-detailed { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; margin-bottom: 80px; }
.pd-card {
  padding: 32px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); position: relative;
}
.pd-card.popular { border-color: var(--wechat); transform: scale(1.02); box-shadow: var(--shadow-glow); }
.pd-header { margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.pd-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.pd-price { font-size: 36px; font-weight: 900; color: var(--wechat); }
.pd-price span { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.pd-header p { font-size: 13px; color: var(--text-muted); margin-top: 8px; }
.pd-group { margin-bottom: 20px; }
.pd-group h4 { font-size: 13px; font-weight: 600; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.pd-row {
  display: flex; justify-content: space-between; padding: 6px 0;
  font-size: 14px; color: var(--text-secondary);
}
.pd-row.disabled { color: var(--text-muted); }
.pd-row strong { color: var(--text-primary); }
.pd-row.disabled strong { color: var(--text-muted); text-decoration: line-through; }

/* Pricing FAQ */
.pricing-faq { max-width: 720px; margin: 0 auto; }
.pricing-faq h2 { text-align: center; margin-bottom: 32px; }

/* Pricing Compare Section */
.pricing-compare-section { margin-bottom: 80px; }
.pricing-compare-section .section-header { margin-bottom: 48px; }

/* Pricing Banner */
.pricing-banner { padding: 32px 0; }
.pb-inner {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  padding: 20px 32px; border-radius: var(--radius-lg);
  background: rgba(7,193,96,0.04); border: 1px solid rgba(7,193,96,0.15);
  backdrop-filter: blur(8px);
}
.pb-item {
  padding: 6px 16px; font-size: 14px; color: var(--text-secondary);
  font-weight: 500;
}

/* Pricing 4-col */
.pricing-detailed-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== About Page ===== */
.about-hero { padding: 168px 0 60px; text-align: center; border-bottom: 1px solid var(--border-subtle); }
.about-hero h1 { font-size: clamp(28px, 5vw, 48px); font-weight: 900; letter-spacing: -1px; margin-bottom: 16px; }
.about-hero p { font-size: 17px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

.about-story, .about-values, .about-tech, .about-cta { padding: 80px 0; }
.about-story { background: var(--bg-secondary); }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.story-content h2 { font-size: 28px; font-weight: 800; margin-bottom: 20px; }
.story-content p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.story-milestones { display: flex; flex-direction: column; gap: 24px; }
.milestone { display: flex; gap: 16px; padding: 20px; border-radius: 12px; background: var(--bg-card); border: 1px solid var(--border-color); }
.ms-year {
  min-width: 60px; height: 60px; border-radius: 12px;
  background: rgba(7,193,96,0.08); color: var(--wechat);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 14px; flex-shrink: 0;
}
.ms-text strong { display: block; font-size: 16px; margin-bottom: 4px; }
.ms-text p { font-size: 13px; color: var(--text-muted); }

.values-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 32px; }
.value-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.value-card:hover { border-color: rgba(7,193,96,0.3); }
.value-icon { font-size: 32px; margin-bottom: 16px; }
.value-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.tech-desc { text-align: center; color: var(--text-muted); margin-bottom: 32px; }
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tech-item {
  padding: 16px; border-radius: 10px; background: var(--bg-card);
  border: 1px solid var(--border-color); text-align: center;
}
.tech-item strong { display: block; font-size: 15px; margin-bottom: 4px; color: var(--wechat); }
.tech-item span { font-size: 12px; color: var(--text-muted); }

/* Capabilities Overview */
.about-capabilities { background: var(--bg-secondary); }
.cap-overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap-overview-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.cap-overview-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.cap-overview-card.main {
  grid-column: span 3; background: linear-gradient(135deg, rgba(7,193,96,0.06), var(--bg-card));
  border-color: rgba(7,193,96,0.18);
}
.coc-icon { font-size: 36px; margin-bottom: 16px; }
.cap-overview-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.cap-overview-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.coc-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.coc-tags span {
  padding: 4px 12px; border-radius: 20px; font-size: 12px;
  background: rgba(7,193,96,0.06); color: var(--wechat);
  border: 1px solid rgba(7,193,96,0.12);
}

/* Numbers section */
.about-numbers { padding: 60px 0; }
.numbers-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.num-card {
  text-align: center; padding: 24px 16px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border-color);
  transition: var(--transition);
}
.num-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); }
.num-card strong { display: block; font-size: 28px; font-weight: 900; color: var(--wechat); margin-bottom: 4px; }
.num-card span { display: block; font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.num-card p { font-size: 12px; color: var(--text-muted); }

/* Tech extensions */
.tech-extensions { margin-top: 32px; text-align: center; }
.tech-extensions h4 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--text-secondary); }
.ext-list { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.ext-tag {
  padding: 6px 16px; border-radius: 20px; font-size: 13px;
  background: rgba(7,193,96,0.04); color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.about-cta { background: var(--bg-secondary); }
.cta-box {
  text-align: center; padding: 60px; border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(7,193,96,0.06), rgba(7,193,96,0.01));
  border: 1px solid rgba(7,193,96,0.15);
}
.cta-box h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.cta-box p { color: var(--text-secondary); margin-bottom: 28px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Open Source Page ===== */
.os-hero {
  padding: 188px 0 80px; text-align: center;
  position: relative; overflow: hidden;
}
.os-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(7,193,96,0.06), transparent 70%);
  pointer-events: none;
}
.os-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 30px;
  background: rgba(7,193,96,0.08); border: 1px solid rgba(7,193,96,0.2);
  color: var(--wechat); font-size: 14px; font-weight: 500;
  margin-bottom: 24px; position: relative; z-index: 1; backdrop-filter: blur(8px);
}
.os-hero h1 {
  font-size: clamp(36px, 6vw, 56px); font-weight: 900;
  letter-spacing: -1.5px; margin-bottom: 20px; position: relative; z-index: 1;
}
.os-desc {
  font-size: 18px; color: var(--text-secondary); line-height: 1.7;
  margin-bottom: 36px; position: relative; z-index: 1;
}
.os-actions {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 48px; position: relative; z-index: 1;
}
.os-quick-stats {
  display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap;
  padding: 20px 40px; border-radius: var(--radius-xl);
  background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
  position: relative; z-index: 1; backdrop-filter: blur(8px);
}
.os-quick-stats > div { text-align: center; }
.os-quick-stats strong { display: block; font-size: 20px; font-weight: 700; color: var(--wechat); }
.os-quick-stats span { font-size: 12px; color: var(--text-muted); }
.os-quick-stats .divider { width: 1px; height: 32px; background: var(--border-color); }

/* OS Features */
.os-features { background: var(--bg-secondary); }
.os-feat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.os-feat-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.os-feat-card:hover { border-color: rgba(7,193,96,0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.os-feat-card.large { grid-column: span 3; }
.os-feat-icon { font-size: 36px; margin-bottom: 16px; }
.os-feat-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.os-feat-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.os-feat-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.os-feat-tags span {
  padding: 4px 12px; border-radius: 20px; font-size: 12px;
  background: rgba(7,193,96,0.06); color: var(--wechat);
  border: 1px solid rgba(7,193,96,0.12);
}

/* Tech Stack */
.tech-stack-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ts-card {
  padding: 24px; border-radius: var(--radius); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
  text-align: center;
}
.ts-card:hover { border-color: rgba(7,193,96,0.3); }
.ts-card.ts-main { border-color: rgba(7,193,96,0.25); background: linear-gradient(135deg, rgba(7,193,96,0.06), var(--bg-card)); }
.ts-logo { font-size: 32px; margin-bottom: 12px; }
.ts-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.ts-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
.ts-exts { font-size: 12px; color: var(--text-muted); margin-top: 10px; }

/* Compare Table */
.compare-table-wrap {
  overflow-x: auto; border-radius: var(--radius-lg);
  border: 1px solid var(--border-color); margin-bottom: 48px;
}
.compare-table {
  width: 100%; border-collapse: collapse; font-size: 14px;
}
.compare-table th, .compare-table td {
  padding: 14px 20px; text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}
.compare-table th { background: rgba(7,193,96,0.03); font-weight: 600; white-space: nowrap; }
.ct-feature { width: 30%; color: var(--text-primary); }
.ct-open { width: 35%; }
.ct-commercial { width: 35%; }
.ct-header { text-align: center; }
.ct-badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: 14px; font-weight: 700; margin-bottom: 4px;
}
.ct-badge.open { background: rgba(107,114,128,0.12); color: #9ca3af; }
.ct-badge.commercial { background: rgba(7,193,96,0.12); color: var(--wechat); }
.ct-price { display: block; font-size: 12px; color: var(--text-muted); font-weight: 400; }
.ct-category td {
  padding: 10px 20px; font-weight: 700; color: var(--wechat);
  background: rgba(7,193,96,0.03); font-size: 14px;
}
.ct-yes { color: #4ade80; }
.ct-no { color: #6b7280; }
.ct-partial { color: #facc15; }

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

/* ===== Changelog Page ===== */
.changelog-timeline-section { padding: 80px 0; background: var(--bg-secondary); }
.changelog-cta { padding: 80px 0; }

.cl-timeline { max-width: 860px; margin: 0 auto; position: relative; }
.cl-timeline::before {
  content: ''; position: absolute; left: 120px; top: 0; bottom: 0;
  width: 2px; background: var(--border-color);
}

.cl-item {
  position: relative; padding-left: 152px; margin-bottom: 40px;
  min-height: 24px;
}
.cl-item:last-child { margin-bottom: 0; }

.cl-dot {
  position: absolute; left: 113px; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--wechat); border: 3px solid var(--bg-secondary);
  box-shadow: 0 0 0 3px rgba(7,193,96,0.2);
  z-index: 2;
}
.cl-dot.older {
  background: var(--text-muted); box-shadow: 0 0 0 3px rgba(90,125,108,0.15);
}

.cl-date {
  position: absolute; left: 0; top: 6px; width: 105px; text-align: right;
}
.cl-date-label {
  display: block; font-size: 14px; font-weight: 700; color: var(--text-primary);
  line-height: 1.3;
}
.cl-version {
  display: inline-block; padding: 1px 8px; border-radius: 10px;
  font-size: 11px; font-weight: 600; color: var(--wechat);
  background: rgba(7,193,96,0.1); border: 1px solid rgba(7,193,96,0.15);
  margin-top: 4px;
}
.cl-dot.older + .cl-date .cl-version {
  color: var(--text-muted); background: rgba(90,125,108,0.08); border-color: rgba(90,125,108,0.12);
}

.cl-card {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); transition: var(--transition);
}
.cl-card:hover { border-color: rgba(7,193,96,0.3); box-shadow: var(--shadow-md); }
.cl-card h3 {
  font-size: 20px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.3px;
}

.cl-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.cl-tag {
  padding: 2px 12px; border-radius: 20px; font-size: 11px; font-weight: 600;
  letter-spacing: 0.3px;
}
.cl-tag.feat { background: rgba(7,193,96,0.1); color: var(--wechat); border: 1px solid rgba(7,193,96,0.15); }
.cl-tag.fix { background: rgba(239,68,68,0.08); color: #f87171; border: 1px solid rgba(239,68,68,0.15); }
.cl-tag.opt { background: rgba(59,130,246,0.08); color: #60a5fa; border: 1px solid rgba(59,130,246,0.15); }

.cl-body { display: flex; flex-direction: column; gap: 20px; }
.cl-group {
  padding: 16px 20px; border-radius: 12px;
  background: rgba(7,193,96,0.02); border: 1px solid var(--border-subtle);
}
.cl-group h4 {
  font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--text-primary);
  display: flex; align-items: center; gap: 8px;
}
.cl-check {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.cl-check.feat { background: var(--wechat); }
.cl-check.fix { background: #f87171; }
.cl-check.opt { background: #60a5fa; }

.cl-group ul { list-style: none; }
.cl-group li {
  padding: 4px 0; font-size: 13px; color: var(--text-secondary); line-height: 1.6;
  padding-left: 16px; position: relative;
}
.cl-group li::before {
  content: ''; position: absolute; left: 0; top: 11px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--border-color);
}

/* Changelog responsive */
@media (max-width: 1024px) {
  .cl-timeline::before { left: 90px; }
  .cl-item { padding-left: 112px; }
  .cl-dot { left: 83px; }
  .cl-date { width: 75px; }
  .cl-date-label { font-size: 12px; }
  .cl-version { font-size: 10px; }
}
@media (max-width: 768px) {
  .cl-timeline::before { left: 20px; }
  .cl-item { padding-left: 44px; padding-top: 36px; }
  .cl-dot { left: 13px; top: 36px; }
  .cl-date {
    position: relative; left: 0; top: 0; width: auto; text-align: left;
    margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
  }
  .cl-date-label { font-size: 13px; }
  .cl-card { padding: 18px; }
  .cl-card h3 { font-size: 16px; }
  .cl-group { padding: 12px; }
  .cl-group h4 { font-size: 13px; }
  .cl-group li { font-size: 12px; padding-left: 12px; }
  .changelog-timeline-section { padding: 40px 0; }
}
.cca-card {
  padding: 36px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color); text-align: center;
}
.cca-card.commercial {
  border-color: var(--wechat);
  background: linear-gradient(135deg, rgba(7,193,96,0.06), var(--bg-card));
}
.cca-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.cca-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }

/* Quick Start */
.os-quickstart { background: var(--bg-secondary); }
.qs-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.qs-step { text-align: center; }
.qs-num {
  width: 48px; height: 48px; border-radius: 50%; background: var(--wechat);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 20px; margin-bottom: 16px;
}
.qs-content h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.qs-content p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
.qs-code {
  margin-top: 10px; padding: 10px 16px; border-radius: 8px;
  background: var(--bg-primary); border: 1px solid var(--border-color);
  font-family: 'Courier New', monospace; font-size: 12px;
  color: var(--wechat); text-align: left; word-break: break-all;
}
.qs-requirements {
  padding: 28px; border-radius: var(--radius-lg); background: var(--bg-card);
  border: 1px solid var(--border-color);
}
.qs-requirements h4 { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.req-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.req-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px;
  border-radius: 8px; background: rgba(7,193,96,0.03); border: 1px solid var(--border-subtle);
}
.req-item strong { color: var(--wechat); font-size: 14px; min-width: 80px; }
.req-item span { font-size: 13px; color: var(--text-secondary); }

/* Upgrade CTA */
.os-upgrade { padding: 80px 0; }
.upgrade-box {
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  padding: 48px; border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(7,193,96,0.06), rgba(7,193,96,0.01));
  border: 1px solid rgba(7,193,96,0.15);
}
.ub-content h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; }
.ub-content > p { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.7; }
.ub-features { display: flex; gap: 10px; flex-wrap: wrap; }
.ub-features span {
  padding: 4px 14px; border-radius: 20px; font-size: 13px;
  background: rgba(7,193,96,0.08); color: var(--wechat);
  border: 1px solid rgba(7,193,96,0.12);
}
.ub-action { display: flex; flex-direction: column; gap: 12px; flex-shrink: 0; }

/* Responsive for sub pages */
@media (max-width: 1024px) {
  .os-feat-grid { grid-template-columns: repeat(2, 1fr); }
  .os-feat-card.large { grid-column: span 2; }
  .qs-steps { grid-template-columns: repeat(2, 1fr); }
  .upgrade-box { flex-direction: column; text-align: center; }
  .ub-action { flex-direction: row; justify-content: center; }
  .compare-cta { grid-template-columns: 1fr; }
}