/* ============================================================
   热点科技 — 企业级 AI 产品矩阵
   设计原则：专业、可信、有质感、有层次
   细节见真章，每一处都有变化
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-muted: #f1f5f9;
  --bg-warm: #fafbfc;
  --card: #ffffff;
  --card-hover: #fafbfd;
  --card-muted: #f8fafc;
  --border: #e2e8f0;
  --border-light: #eef1f5;
  --border-strong: #cbd5e1;
  --title: #0f172a;
  --body: #475569;
  --muted: #64748b;
  --muted-light: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: rgba(37, 99, 235, 0.06);
  --primary-glow: rgba(37, 99, 235, 0.12);
  --accent: #0f172a;
  --accent-hover: #1e293b;
  --accent-soft: rgba(15, 23, 42, 0.06);
  --success: #16a34a;
  --warning: #d97706;
  --radius: 10px;
  --radius-sm: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --max-width: 1200px;
  --header-height: 72px;
  --font: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 24px 56px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-card-hover: 0 4px 16px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-featured: 0 0 0 1px rgba(37, 99, 235, 0.1), 0 8px 28px rgba(15, 23, 42, 0.06);
  --shadow-elevated: 0 20px 48px rgba(15, 23, 42, 0.1), 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-soft: 0 4px 20px rgba(15, 23, 42, 0.05);
  --shadow-inner: inset 0 1px 2px rgba(15, 23, 42, 0.04);
  --texture-dot: radial-gradient(var(--border) 1px, transparent 1px);
  --texture-grid: linear-gradient(var(--border-light) 1px, transparent 1px), linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  --gradient-dark: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
  --gradient-soft: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 50%, var(--bg-soft) 100%);
  --glow-primary: 0 0 40px rgba(37, 99, 235, 0.12);
  --glow-strong: 0 0 60px rgba(37, 99, 235, 0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--body);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============================================================
   Header — 干净、专业、有分量
   ============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.03);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

.nav { display: flex; align-items: center; gap: 2px; }

.nav a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--body);
  padding: 8px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav a:hover { color: var(--title); background: var(--bg-muted); }
.nav a.active { color: var(--primary); background: var(--primary-soft); font-weight: 600; }

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 0 22px !important;
  height: 40px;
  line-height: 40px;
  border-radius: 100px !important;
  font-size: 14px !important;
  font-weight: 600;
  margin-left: 10px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s !important;
}
.nav-cta:hover {
  background: var(--accent-hover) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--title);
  cursor: pointer;
  padding: 8px;
}

/* ============================================================
   Buttons — 多种风格，各有用途
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg);
  color: var(--body);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover {
  background: #fff;
  border-color: var(--muted);
  color: var(--title);
}

.btn-outline {
  background: #fff;
  color: var(--title);
  border: 1px solid var(--border-strong);
}
.btn-outline:hover { background: var(--bg-soft); border-color: var(--primary); color: var(--primary); }

.btn-ghost {
  background: transparent;
  color: var(--body);
  border: 1px solid transparent;
}
.btn-ghost:hover { background: var(--bg-soft); color: var(--title); }

.btn-text {
  background: transparent;
  color: var(--primary);
  padding: 0; height: auto;
  font-weight: 600;
}
.btn-text:hover { color: var(--accent); }

/* ============================================================
   Hero — 有冲击力的第一印象
   ============================================================ */
.hero {
  position: relative;
  padding: 170px 0 130px;
  overflow: hidden;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 35%, #ffffff 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0; right: 0;
  width: 700px; height: 500px;
  background: radial-gradient(ellipse at bottom right, rgba(37, 99, 235, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 100px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 28px;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-sm);
}

.hero-label .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
  animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: 54px;
  font-weight: 700;
  color: var(--title);
  line-height: 1.12;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-title em {
  color: var(--primary);
  font-style: normal;
  position: relative;
  display: inline-block;
}
.hero-title em::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0; right: 0;
  height: 8px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 4px;
  z-index: -1;
}

.hero-desc {
  font-size: 18px;
  color: var(--muted);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.8;
}

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

.hero-content > * {
  opacity: 0;
  transform: translateY(20px);
  animation: hero-content-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.hero-content .hero-label { animation-delay: 0.1s; }
.hero-content .hero-title { animation-delay: 0.2s; }
.hero-content .hero-desc { animation-delay: 0.35s; }
.hero-content .hero-actions { animation-delay: 0.5s; }
@keyframes hero-content-in {
  to { opacity: 1; transform: translateY(0); }
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  transition: transform 0.15s linear;
  transform: translate(calc(var(--px, 0) * -18px), calc(var(--py, 0) * -12px));
}

/* Hero Visual Elements */
.hero-grid {
  position: absolute;
  top: 0; right: 0;
  width: 55%; height: 100%;
  opacity: 0.25;
  background-image:
    linear-gradient(var(--border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(135deg, transparent 10%, rgba(0,0,0,0.5) 55%, transparent 90%);
}

.hero-dots {
  position: absolute;
  top: 0; right: 0;
  width: 50%; height: 100%;
  opacity: 0.15;
  background-image: radial-gradient(var(--border-strong) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.4) 0%, transparent 70%);
}

.hero-shape {
  position: absolute;
  background: var(--primary-soft);
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-lg);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.22;
  animation: orb-breathe 8s ease-in-out infinite;
}
.hero-orb.cyan { width: 420px; height: 420px; top: -80px; right: -80px; background: #93c5fd; }
.hero-orb.blue { width: 340px; height: 340px; bottom: -80px; right: 14%; background: #60a5fa; animation-delay: -3s; }
.hero-orb.accent { width: 340px; height: 340px; top: 30%; left: -120px; background: var(--accent); opacity: 0.1; animation-delay: -5s; }
@keyframes orb-breathe {
  0%, 100% { transform: scale(1); opacity: 0.22; }
  50% { transform: scale(1.18); opacity: 0.38; }
}

.hero-aurora {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(37, 99, 235, 0.16) 0%, transparent 42%),
    radial-gradient(ellipse at 20% 70%, rgba(37, 99, 235, 0.1) 0%, transparent 38%),
    radial-gradient(ellipse at 60% 80%, rgba(37, 99, 235, 0.12) 0%, transparent 40%);
  animation: aurora-shift 10s ease-in-out infinite;
}
@keyframes aurora-shift {
  0%, 100% { opacity: 0.75; transform: translateX(0) scale(1); }
  33% { opacity: 1; transform: translateX(-40px) scale(1.04); }
  66% { opacity: 0.9; transform: translateX(20px) scale(0.98); }
}

.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.hero-particles::before,
.hero-particles::after,
.hero-particles span {
  content: "";
  position: absolute;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.35;
  animation: float-particle 7s ease-in-out infinite;
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}
.hero-particles::before { top: 20%; right: 32%; }
.hero-particles::after { top: 42%; right: 22%; animation-delay: -3s; width: 4px; height: 4px; }
.hero-particles span {
  background: radial-gradient(circle, rgba(37,99,235,0.9), rgba(37,99,235,0.2));
}

/* Hero floating badge */
.hero-float-badge {
  position: absolute;
  right: 8%;
  top: 22%;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
  animation: badge-float 5s ease-in-out infinite;
}
.hero-float-badge .badge-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-float-badge .badge-text { font-size: 13px; color: var(--muted); }
.hero-float-badge .badge-text strong { display: block; color: var(--title); font-size: 15px; }
@keyframes badge-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes float-particle {
  0%, 100% { transform: translate(0, 0); opacity: 0.15; }
  25% { transform: translate(30px, -20px); opacity: 0.4; }
  50% { transform: translate(-20px, -40px); opacity: 0.1; }
  75% { transform: translate(-30px, 10px); opacity: 0.35; }
}

/* Radar (GEO) */
.radar { position: absolute; right: 15%; top: 50%; transform: translateY(-50%); width: 340px; height: 340px; filter: drop-shadow(0 0 28px rgba(37, 99, 235, 0.18)); }
.radar-ring { position: absolute; inset: 0; border-radius: 50%; border: 1.5px solid var(--border-strong); animation: radar-pulse 2.4s ease-out infinite; }
.radar-ring:nth-child(2) { animation-delay: -0.8s; }
.radar-ring:nth-child(3) { animation-delay: -1.6s; }
.radar-sweep { position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(from 0deg, rgba(37, 99, 235, 0.22) 0deg, transparent 80deg); animation: radar-spin 2.5s linear infinite; }
.radar-core { position: absolute; inset: 0; border-radius: 50%; border: 2px solid rgba(37, 99, 235, 0.25); display: flex; align-items: center; justify-content: center; }
.radar-core::after { content: ""; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 24px rgba(37, 99, 235, 0.6); animation: core-pulse 1.8s ease-in-out infinite; }
@keyframes radar-pulse { 0% { transform: scale(0.3); opacity: 0.7; } 100% { transform: scale(1.35); opacity: 0; } }
@keyframes radar-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes core-pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.45); opacity: 0.55; } }

.hero-platform-pill {
  position: absolute;
  padding: 8px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--title);
  box-shadow: var(--shadow-md);
  animation: pill-float 5s ease-in-out infinite;
  z-index: 2;
}
@keyframes pill-float { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-12px) rotate(2deg); } }

/* CPI Flow */
.cpi-flow { position: absolute; right: 8%; top: 50%; transform: translateY(-50%); display: flex; align-items: center; gap: 18px; flex-wrap: wrap; max-width: 480px; filter: drop-shadow(0 0 24px rgba(37, 99, 235, 0.12)); }
.cpi-step { text-align: center; animation: cpi-step-pop 3s ease-in-out infinite; }
.cpi-step:nth-child(1) { animation-delay: 0s; }
.cpi-step:nth-child(3) { animation-delay: -0.75s; }
.cpi-step:nth-child(5) { animation-delay: -1.5s; }
.cpi-step:nth-child(7) { animation-delay: -2.25s; }
.cpi-node { width: 64px; height: 64px; border-radius: 18px; background: #fff; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--primary); margin: 0 auto 8px; transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s; box-shadow: var(--shadow-sm); animation: cpi-node-glow 3s ease-in-out infinite; }
.cpi-step:nth-child(1) .cpi-node { animation-delay: 0s; }
.cpi-step:nth-child(3) .cpi-node { animation-delay: -0.75s; }
.cpi-step:nth-child(5) .cpi-node { animation-delay: -1.5s; }
.cpi-step:nth-child(7) .cpi-node { animation-delay: -2.25s; }
.cpi-step:hover .cpi-node { transform: scale(1.12); border-color: var(--primary); box-shadow: 0 8px 28px rgba(37, 99, 235, 0.18); }
.cpi-label { font-size: 12px; color: var(--muted); font-weight: 500; }
.cpi-arrow { color: var(--primary); opacity: 0.5; animation: cpi-arrow-glow 1.6s ease-in-out infinite; }
.cpi-arrow:nth-child(4) { animation-delay: -0.4s; }
.cpi-arrow:nth-child(6) { animation-delay: -0.8s; }
@keyframes cpi-step-pop { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes cpi-arrow-glow { 0%, 100% { opacity: 0.25; transform: translateX(0); } 50% { opacity: 1; transform: translateX(4px); } }
@keyframes cpi-node-glow { 0%, 100% { box-shadow: 0 0 0 rgba(37,99,235,0); } 50% { box-shadow: 0 0 20px rgba(37,99,235,0.18); } }

/* Neural Grid */
.neural-grid { position: absolute; right: 6%; top: 50%; transform: translateY(-50%); width: 480px; height: 400px; filter: drop-shadow(0 0 20px rgba(37, 99, 235, 0.12)); }
.neural-node { position: absolute; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); opacity: 0.7; animation: node-pulse 2s ease-in-out infinite; box-shadow: 0 0 16px rgba(37, 99, 235, 0.45); }
.neural-line { position: absolute; height: 2px; background: linear-gradient(90deg, rgba(37, 99, 235, 0.35), rgba(37, 99, 235, 0.05)); transform-origin: left center; animation: line-draw 2.2s ease-in-out infinite; }
@keyframes node-pulse { 0%, 100% { transform: scale(1); opacity: 0.4; } 50% { transform: scale(2.6); opacity: 1; box-shadow: 0 0 24px rgba(37, 99, 235, 0.6); } }
@keyframes line-draw { 0%, 100% { opacity: 0.15; } 50% { opacity: 0.65; } }

/* Chat Bubbles */
.chat-window { position: absolute; right: 6%; top: 50%; transform: translateY(-50%); width: 380px; height: 440px; background: rgba(255,255,255,0.75); backdrop-filter: blur(14px); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 24px 56px rgba(15,23,42,0.12), 0 0 0 1px rgba(37,99,235,0.06); padding: 22px; animation: window-float 6s ease-in-out infinite; }
.chat-window-header { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--border-light); }
.chat-window-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: flex; align-items: center; justify-content: center; animation: avatar-pulse 2.5s ease-in-out infinite; }
.chat-window-title { font-size: 13px; font-weight: 600; color: var(--title); }
.chat-window-title span { display: block; font-size: 11px; font-weight: 400; color: var(--success); }
.chat-bubble { position: absolute; padding: 13px 18px; border-radius: 16px; font-size: 13px; max-width: 260px; opacity: 0; animation: bubble-float 4s ease-in-out infinite, bubble-in 0.6s ease-out forwards; }
.chat-bubble.ai { right: 24px; top: 90px; background: #fff; border: 1px solid var(--border); color: var(--body); border-bottom-left-radius: 4px; box-shadow: var(--shadow-md); animation-delay: 0s, 0.2s; }
.chat-bubble.user { right: 24px; top: 162px; background: var(--primary-soft); border: 1px solid rgba(37, 99, 235, 0.12); color: var(--primary); border-bottom-right-radius: 4px; animation-delay: -2s, 0.8s; }
.chat-bubble.ai-second { right: 24px; top: 234px; background: #fff; border: 1px solid var(--border); color: var(--body); border-bottom-left-radius: 4px; box-shadow: var(--shadow-md); animation-delay: -4s, 1.4s; }
@keyframes window-float { 0%, 100% { transform: translateY(-50%) translateX(0) rotate(0deg); } 50% { transform: translateY(-52%) translateX(10px) rotate(0.5deg); } }
@keyframes avatar-pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(37,99,235,0.2); } 50% { box-shadow: 0 0 0 10px rgba(37,99,235,0); } }
@keyframes bubble-in { 0% { opacity: 0; transform: translateY(10px) scale(0.95); } 100% { opacity: 1; transform: translateY(0) scale(1); } }
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-md);
  animation: bubble-float 6s ease-in-out infinite;
  animation-delay: -1s;
}
.typing-indicator span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  animation: typing-dot 1.4s ease-in-out infinite;
}
.typing-indicator span:nth-child(1) { animation-delay: 0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-dot {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-5px); opacity: 1; }
}
@keyframes bubble-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* Orbit */
.orbit { position: absolute; right: 12%; top: 50%; transform: translateY(-50%); width: 300px; height: 300px; }
.orbit-ring { position: absolute; inset: -40px; border-radius: 50%; border: 1px solid var(--border); animation: orbit-spin 20s linear infinite; }
.orbit-ring.second { inset: -80px; animation-duration: 30s; animation-direction: reverse; }
.orbit-center { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 28px; }
.orbit-node { position: absolute; width: 44px; height: 44px; border-radius: 12px; background: #fff; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--muted); transition: all 0.3s; box-shadow: var(--shadow-sm); }
.orbit-node:hover { color: var(--primary); border-color: var(--primary); }
@keyframes orbit-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Home Orbit */
.home-orbit { position: absolute; right: 10%; top: 50%; transform: translateY(-50%); width: 340px; height: 340px; }
.home-orbit-ring { position: absolute; inset: -20px; border-radius: 50%; border: 1px solid var(--border); animation: orbit-spin 25s linear infinite; }
.home-orbit-ring.second { inset: -60px; animation-duration: 35s; animation-direction: reverse; }
.home-orbit-ring.third { inset: -100px; animation-duration: 45s; }
.home-center { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 32px; }
.home-node { position: absolute; width: 48px; height: 48px; border-radius: 14px; background: #fff; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--muted); transition: all 0.3s; box-shadow: var(--shadow-sm); }
.home-node:hover { color: var(--primary); border-color: var(--primary); }

/* Compute Grid */
.compute-grid { position: absolute; right: 8%; top: 50%; transform: translateY(-50%) perspective(800px) rotateY(-15deg) rotateX(5deg); display: grid; grid-template-columns: repeat(6, 1fr); gap: 5px; opacity: 0.7; animation: compute-tilt 8s ease-in-out infinite; }
.compute-cell { width: 38px; height: 38px; border-radius: 6px; background: var(--bg-muted); border: 1px solid var(--border-light); animation: cell-flicker 2.2s ease-in-out infinite; }
.compute-cell:nth-child(3n) { animation-delay: -1s; }
.compute-cell:nth-child(5n+2) { animation-delay: -2s; }
.compute-cell:nth-child(7n+4) { animation-delay: -0.5s; }
.compute-cell.active { background: var(--primary-soft); border-color: rgba(37, 99, 235, 0.35); box-shadow: 0 0 16px rgba(37, 99, 235, 0.2); animation: cell-flicker 1.6s ease-in-out infinite, cell-glow 2s ease-in-out infinite; }
@keyframes compute-tilt { 0%, 100% { transform: translateY(-50%) perspective(800px) rotateY(-15deg) rotateX(5deg); } 50% { transform: translateY(-50%) perspective(800px) rotateY(-12deg) rotateX(8deg); } }
@keyframes cell-flicker { 0%, 100% { background: var(--bg-muted); border-color: var(--border-light); } 50% { background: var(--primary-soft); border-color: rgba(37, 99, 235, 0.25); box-shadow: 0 0 10px rgba(37, 99, 235, 0.12); } }
@keyframes cell-glow { 0%, 100% { box-shadow: 0 0 12px rgba(37, 99, 235, 0.15); } 50% { box-shadow: 0 0 24px rgba(37, 99, 235, 0.35); } }

/* Signal Rings */
.signal-ring { position: absolute; right: 20%; top: 50%; transform: translate(50%, -50%); width: 220px; height: 220px; border-radius: 50%; border: 2px solid rgba(37, 99, 235, 0.35); animation: signal-expand 2.4s ease-out infinite; }
.signal-ring.second { width: 300px; height: 300px; animation-delay: -0.8s; border-width: 1.5px; }
.signal-ring.third { width: 380px; height: 380px; animation-delay: -1.6s; border-width: 1px; }
.signal-core { position: absolute; right: 20%; top: 50%; transform: translate(50%, -50%); width: 68px; height: 68px; border-radius: 50%; background: linear-gradient(135deg, var(--primary-soft), rgba(37,99,235,0.2)); border: 1px solid rgba(37, 99, 235, 0.25); display: flex; align-items: center; justify-content: center; color: var(--primary); box-shadow: 0 0 28px rgba(37, 99, 235, 0.2); animation: core-glow 2.2s ease-in-out infinite; }
.contact-orbit-icon { position: absolute; right: 20%; top: 50%; width: 44px; height: 44px; border-radius: 50%; background: #fff; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--primary); box-shadow: var(--shadow-md); animation: contact-orbit 7s linear infinite; }
.contact-orbit-icon:nth-child(1) { animation-delay: 0s; }
.contact-orbit-icon:nth-child(2) { animation-delay: -2.3s; }
.contact-orbit-icon:nth-child(3) { animation-delay: -4.6s; }
@keyframes signal-expand { 0% { transform: translate(50%, -50%) scale(0.5); opacity: 0.75; } 100% { transform: translate(50%, -50%) scale(1.85); opacity: 0; } }
@keyframes core-glow { 0%, 100% { box-shadow: 0 0 20px rgba(37, 99, 235, 0.15); transform: translate(50%, -50%) scale(1); } 50% { box-shadow: 0 0 48px rgba(37, 99, 235, 0.35); transform: translate(50%, -50%) scale(1.08); } }
@keyframes contact-orbit {
  0% { transform: translate(50%, -50%) rotate(0deg) translateX(140px) rotate(0deg); }
  100% { transform: translate(50%, -50%) rotate(360deg) translateX(140px) rotate(-360deg); }
}

/* ============================================================
   Sections — 多种背景，让每一屏都有变化
   ============================================================ */
.section { padding: 110px 0; position: relative; }

.section-alt {
  background: var(--bg-soft);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-muted {
  background: var(--bg-muted);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-gradient {
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 50%, var(--bg-soft) 100%);
}

/* Section dividers — 装饰性分隔线 */
.section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), rgba(37, 99, 235, 0.2));
  border-radius: 2px;
  margin: 0 auto 20px;
}

.section-divider.left { margin-left: 0; }

.section-divider-dot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 auto 32px;
  color: var(--muted-light);
}
.section-divider-dot::before,
.section-divider-dot::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--border);
}
.section-divider-dot.left { margin-left: 0; justify-content: flex-start; }

/* Section pattern overlay */
.section-pattern {
  position: relative;
}
.section-pattern::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border) 0.5px, transparent 0.5px);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
}

.section-header {
  max-width: 680px;
  margin-bottom: 64px;
}

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 18px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.8;
}

.section-sublabel {
  font-size: 15px;
  color: var(--muted);
  margin-top: 12px;
  line-height: 1.7;
}

.section-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
  line-height: 1.7;
}

/* ============================================================
   Grids
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }

/* Product matrix — 错落有致的产品网格 */
.product-matrix {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.product-matrix .product-card:nth-child(1) { grid-column: span 3; }
.product-matrix .product-card:nth-child(2) { grid-column: span 3; }
.product-matrix .product-card:nth-child(3) { grid-column: span 2; }
.product-matrix .product-card:nth-child(4) { grid-column: span 2; }
.product-matrix .product-card:nth-child(5) { grid-column: span 2; }
.product-matrix .product-card:nth-child(6) { grid-column: span 6; }

/* ============================================================
   Cards — 多种变体，各有质感
   ============================================================ */

/* Default card */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card-hover);
}

/* Elevated card — 更有分量的卡片，强调阴影层次 */
.card-elevated {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.08), 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.card-elevated:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.12), 0 2px 6px rgba(15, 23, 42, 0.04);
  border-color: var(--border-strong);
}

/* Subtle card — 融入背景的卡片 */
.card-subtle {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  box-shadow: none;
}
.card-subtle:hover {
  background: var(--card);
  border-color: var(--border);
  box-shadow: var(--shadow-card);
}

/* Bordered card — 强调边框，hover 时边框发光 */
.card-bordered {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  box-shadow: none;
}
.card-bordered:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.08), var(--shadow-card-hover);
  transform: translateY(-3px);
}

/* Gradient card — 柔和渐变 + 顶部强调 */
.card-gradient {
  background: linear-gradient(160deg, #ffffff 0%, var(--bg-soft) 60%, #f1f5f9 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.card-gradient::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), rgba(37, 99, 235, 0.2));
  opacity: 0.6;
  transition: opacity 0.3s;
}
.card-gradient:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.card-gradient:hover::before { opacity: 1; }

/* Numbered card — 带编号的卡片 */
.card-number {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 42px;
  font-weight: 700;
  color: var(--border-strong);
  line-height: 1;
  opacity: 0.6;
  letter-spacing: -0.03em;
  transition: color 0.3s;
}
.card:hover .card-number { color: var(--primary); opacity: 0.35; }

/* Accent left card */
.card-accent-left {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 32px 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}
.card-accent-left:hover {
  border-left-color: var(--primary-hover);
  box-shadow: var(--shadow-card-hover);
}

/* Card icon variations */
.card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 20px;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}
.card:hover .card-icon { background: rgba(37, 99, 235, 0.1); transform: scale(1.05); }

.card-icon.blue { color: var(--primary); background: var(--primary-soft); }
.card-icon.accent { color: var(--accent); background: var(--accent-soft); }
.card-icon.success { color: var(--success); background: rgba(22, 163, 74, 0.08); }
.card-icon.warning { color: var(--warning); background: rgba(217, 119, 6, 0.08); }

/* Large card icon */
.card-icon-lg {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 28px;
  transition: all 0.3s;
}

/* Circle card icon */
.card-icon-circle {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
  border: 2px solid rgba(37, 99, 235, 0.08);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
}

/* Product cards */
.product-card { display: block; }
.product-card .card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.product-card .arrow {
  color: var(--muted-light);
  transition: transform 0.3s, color 0.3s;
}
.product-card:hover .arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* Card tags */
.card-tags {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.card-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--bg-soft);
  color: var(--muted);
  border: 1px solid var(--border);
}
.card-tag.hot { background: var(--accent-soft); color: var(--accent); border-color: rgba(15, 23, 42, 0.1); }
.card-tag.new { background: var(--primary-soft); color: var(--primary); border-color: rgba(37, 99, 235, 0.1); }

/* Card price hint */
.card-price-hint {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

/* ============================================================
   Stats — 数据可信度展示
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat-item {
  text-align: center;
  padding: 48px 24px;
  background: var(--bg);
  transition: background 0.3s;
}
.stat-item:hover { background: var(--bg-soft); }

.stat-number {
  font-size: 44px;
  font-weight: 700;
  color: var(--title);
  line-height: 1;
  margin-bottom: 10px;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

/* ============================================================
   Pricing — 清晰、有对比、有推荐
   ============================================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-grid-4 { grid-template-columns: repeat(4, 1fr); }

.pricing-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card-hover);
}

.pricing-card.featured {
  border-color: rgba(37, 99, 235, 0.3);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.025) 0%, var(--card) 35%);
  box-shadow: var(--shadow-featured);
}

.pricing-badge {
  position: absolute;
  top: -1px;
  right: 28px;
  padding: 6px 16px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.pricing-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}

.pricing-target {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 42px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.pricing-price span {
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
}

.pricing-note {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
  line-height: 1.6;
}

.pricing-features {
  list-style: none;
  margin-bottom: 36px;
  flex: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--body);
  margin-bottom: 14px;
  line-height: 1.5;
}

.pricing-features li i {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--title);
  margin: 72px 0 28px;
}

.pricing-token {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
  padding: 6px 12px;
  background: var(--accent-soft);
  border-radius: 100px;
}

/* ============================================================
   Pricing Table
   ============================================================ */
.pricing-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: var(--card);
}

.pricing-table th,
.pricing-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.pricing-table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--bg-soft);
}

.pricing-table td { color: var(--body); }
.pricing-table tr:last-child td { border-bottom: none; }
.pricing-table tbody tr:hover td { background: var(--bg-soft); }
.pricing-table tbody tr:nth-child(even) td { background: var(--bg-warm); }
.pricing-table tbody tr:nth-child(even):hover td { background: var(--bg-soft); }

.price-cell {
  color: var(--primary);
  font-weight: 700;
}

/* ============================================================
   Trust Badges
   ============================================================ */
.trust-badges {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 48px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  margin: 48px 0;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--body);
  font-weight: 500;
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}
.trust-badge:hover {
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.trust-badge i { color: var(--primary); }

/* Legacy trust badge style (for center text layout) */
.trust-badge-item {
  text-align: center;
  min-width: 120px;
}
.trust-badge-icon {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 8px;
}
.trust-badge-label {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
}

.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 44px;
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group { margin-bottom: 22px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--title);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted-light); }

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

.form-group textarea { min-height: 130px; resize: vertical; }

.contact-info h3 {
  font-size: 28px;
  color: var(--title);
  margin-bottom: 16px;
  font-weight: 700;
}

.contact-info > p {
  color: var(--muted);
  margin-bottom: 40px;
  font-size: 15px;
  line-height: 1.7;
}

.info-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.info-list li i {
  color: var(--primary);
  margin-top: 4px;
}

.info-list strong {
  display: block;
  color: var(--title);
  margin-bottom: 4px;
  font-weight: 600;
}

.info-list span { color: var(--muted); font-size: 14.5px; }

/* Contact reasons */
.contact-reasons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.contact-reason {
  padding: 18px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--body);
  line-height: 1.6;
  transition: all 0.3s;
}
.contact-reason:hover {
  background: var(--card);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.contact-reason strong {
  display: block;
  color: var(--title);
  font-size: 14px;
  margin-bottom: 4px;
}

.contact-placeholder {
  display: inline-block;
  padding: 2px 8px;
  border: 1px dashed var(--border-strong);
  border-radius: 4px;
  color: var(--muted);
  font-size: 13.5px;
  background: var(--bg-soft);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--title);
  cursor: pointer;
  text-align: left;
  gap: 16px;
}
.faq-q i { color: var(--muted); transition: transform 0.3s ease; flex-shrink: 0; }

.faq-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  margin-right: 14px;
  flex-shrink: 0;
  transition: all 0.3s;
}
.faq-item.open .faq-number {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.1);
}
.faq-item.open .faq-q i { transform: rotate(45deg); }

.faq-a {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  display: none;
  padding: 0 24px 20px;
}
.faq-item.open .faq-a { display: block; }

/* ============================================================
   Highlight Box / Case Study
   ============================================================ */
.highlight-box {
  background: var(--primary-soft);
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius);
  padding: 32px 36px;
  margin: 40px 0;
}

.highlight-box h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.highlight-box p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.7;
}

/* ============================================================
   Value Prop Cards
   ============================================================ */
.value-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 44px 40px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.value-card .value-number {
  font-size: 56px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.value-card .value-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 12px;
}

.value-card .value-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

.value-card.elevated {
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.08), 0 1px 3px rgba(15, 23, 42, 0.04);
  padding: 48px 44px;
}
.value-card.featured {
  background: linear-gradient(160deg, #ffffff 0%, var(--bg-soft) 60%, #f1f5f9 100%);
  border-top: 3px solid var(--primary);
  border-radius: 0 0 var(--radius) var(--radius);
}
.value-card.featured .value-number {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.value-card.dark {
  background: var(--gradient-dark);
  border-color: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
}
.value-card.dark .value-number { color: #fff; }
.value-card.dark .value-title { color: #fff; }
.value-card.dark .value-desc { color: rgba(255, 255, 255, 0.65); }

/* ============================================================
   Case Study Cards
   ============================================================ */
.case-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}
.case-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.case-logo {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  font-weight: 700;
}
.case-meta h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
}
.case-meta span {
  font-size: 13px;
  color: var(--muted);
}
.case-metrics {
  display: flex;
  gap: 24px;
  margin: 24px 0;
  padding: 20px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.case-metric {
  text-align: center;
}
.case-metric .number {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}
.case-metric .label {
  font-size: 12px;
  color: var(--muted);
}
.case-quote {
  font-size: 15px;
  color: var(--body);
  line-height: 1.7;
  font-style: normal;
}

/* Case card horizontal — 横向布局案例 */
.case-card.horizontal {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: center;
  padding: 40px;
}
.case-card.horizontal .case-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-right: 32px;
  border-right: 1px solid var(--border-light);
}
.case-card.horizontal .case-logo {
  width: 72px; height: 72px;
  border-radius: 20px;
  font-size: 28px;
  margin-bottom: 16px;
}
.case-card.horizontal .case-meta h4 { font-size: 18px; }
.case-card.horizontal .case-meta span { font-size: 14px; }
.case-card.horizontal .case-body { padding: 0; }
.case-card.horizontal .case-metrics {
  border: none;
  padding: 0;
  margin: 20px 0 0;
  justify-content: flex-start;
  gap: 40px;
}
.case-card.horizontal .case-metric { text-align: left; }
.case-card.horizontal .case-metric .number { font-size: 32px; }
.case-card.horizontal .case-metric .label { font-size: 13px; }
.case-card.horizontal .case-quote { margin-top: 20px; padding-left: 20px; border-left: 3px solid var(--primary); }

/* ============================================================
   Quote / Testimonial
   ============================================================ */
.quote {
  border-left: 3px solid var(--primary);
  padding-left: 24px;
  margin: 36px 0;
}
.quote p {
  font-size: 18px;
  color: var(--title);
  font-weight: 500;
  line-height: 1.7;
  margin-bottom: 16px;
}
.quote cite { font-size: 14px; color: var(--muted); font-style: normal; }

/* ============================================================
   Feature List
   ============================================================ */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--body);
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.feature-list li:hover {
  border-color: var(--border);
  background: var(--bg-soft);
  transform: translateX(4px);
}
.feature-list li i { color: var(--primary); flex-shrink: 0; }

/* Timeline — 时间线步骤 */
.timeline {
  position: relative;
  padding-left: 36px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), rgba(37, 99, 235, 0.1));
  border-radius: 1px;
}
.timeline-step {
  position: relative;
  padding-bottom: 32px;
}
.timeline-step:last-child { padding-bottom: 0; }
.timeline-step::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 2px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
  z-index: 1;
}
.timeline-step .step-number {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  z-index: 2;
}
.timeline-step h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}
.timeline-step p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ============================================================
   Bento / Feature Layouts
   ============================================================ */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.bento .card { min-height: 260px; display: flex; flex-direction: column; justify-content: space-between; }
.bento .card.large { grid-column: span 2; }
.bento .card.tall { grid-row: span 2; }

/* ============================================================
   Logo Wall
   ============================================================ */
.logo-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}
.logo-wall-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  min-width: 120px;
  transition: all 0.3s;
}
.logo-wall-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.03) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section .section-title { color: var(--title); }
.cta-section .section-desc { color: var(--muted); }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 72px 0 36px;
  background: var(--bg-soft);
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
}

.footer-desc {
  max-width: 340px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.footer-contact-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--body);
}

.footer-contact-item i {
  width: 16px;
  height: 16px;
  color: var(--primary);
  flex-shrink: 0;
}

.footer-links { display: flex; gap: 72px; }

.footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  color: var(--title);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--muted);
}

.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: var(--muted); transition: color 0.2s; }
.footer-legal a:hover { color: var(--primary); }

.footer-agent {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 32px;
  box-shadow: var(--shadow-sm);
}
.footer-agent h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 8px;
}
.footer-agent p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 16px;
}

/* ============================================================
   Agent Components
   ============================================================ */
.agent-banner {
  background: linear-gradient(90deg, var(--primary-soft) 0%, rgba(37, 99, 235, 0.04) 100%);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
}
.agent-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.agent-banner-text {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--body);
}
.agent-banner-text strong { color: var(--title); font-weight: 600; }
.agent-banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 100px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}
.agent-banner-cta {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}
.agent-banner-cta:hover { gap: 10px; }

.agent-value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.agent-value-card {
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  box-shadow: var(--shadow-sm);
}
.agent-value-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}
.agent-value-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
  transition: all 0.3s;
}
.agent-value-card:hover .icon {
  background: var(--primary);
  color: #fff;
}
.agent-value-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 8px;
}
.agent-value-card p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
}

.agent-profit-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}
.profit-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
  box-shadow: var(--shadow-card);
}
.profit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.profit-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}
.profit-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.profit-price span {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}
.profit-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 14px;
}
.profit-card p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

.profit-card.featured {
  background: linear-gradient(135deg, var(--title) 0%, #1e293b 100%);
  border-color: transparent;
  color: #fff;
}
.profit-card.featured .profit-label { color: rgba(255,255,255,0.7); }
.profit-card.featured .profit-price { color: #fff; }
.profit-card.featured .profit-price span { color: rgba(255,255,255,0.6); }
.profit-card.featured .profit-tag { background: rgba(255,255,255,0.12); color: #fff; }
.profit-card.featured p { color: rgba(255,255,255,0.75); }
.profit-card.featured:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.25);
}

.agent-highlight {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  border-radius: var(--radius-xl);
  padding: 52px 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.agent-highlight::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}
.agent-highlight::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  pointer-events: none;
}
.agent-highlight h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
}
.agent-highlight p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 28px;
  position: relative;
}
.agent-highlight .btn-primary {
  background: #fff;
  color: var(--primary);
}
.agent-highlight .btn-primary:hover {
  background: var(--bg-soft);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}
.agent-highlight .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}
.agent-highlight .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.55);
}

.margin-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 100px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

/* ROI hint */
.roi-hint {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  margin-top: 32px;
}
.roi-hint .icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.roi-hint p {
  font-size: 14.5px;
  color: var(--body);
  line-height: 1.7;
  margin: 0;
}

/* ============================================================
   Outcome Cards
   ============================================================ */
.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.outcome-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.outcome-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.outcome-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 24px;
}
.outcome-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 8px;
}
.outcome-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ============================================================
   Use Case Cards
   ============================================================ */
.use-case-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.use-case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.25);
}
.use-case-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 10px;
}
.use-case-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ============================================================
   Comparison Table
   ============================================================ */
.compare-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: var(--card);
}
.compare-table th,
.compare-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.compare-table th {
  background: var(--bg-soft);
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.compare-table td { color: var(--body); }
.compare-table td strong { color: var(--title); }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .check { color: var(--success); }
.compare-table .cross { color: var(--muted); }

/* Cost comparison bars — 可视化成本对比 */
.cost-compare {
  display: grid;
  gap: 24px;
  margin: 40px 0;
}
.cost-compare-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow-sm);
}
.cost-compare-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.cost-compare-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--title);
  font-size: 15px;
}
.cost-compare-label i { color: var(--primary); }
.cost-compare-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--title);
}
.cost-compare-bar {
  height: 10px;
  background: var(--bg-muted);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 10px;
}
.cost-compare-bar .bar-fill {
  height: 100%;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  transition: width 0.8s ease;
}
.cost-compare-bar .bar-fill.muted {
  background: linear-gradient(90deg, var(--border-strong), var(--muted-light));
}
.cost-compare-bar .bar-fill.glow {
  box-shadow: 0 0 18px rgba(37, 99, 235, 0.35);
}
.cost-compare-desc {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.6;
}

/* ============================================================
   Hero Trust Bar
   ============================================================ */
.hero-trust-bar {
  display: flex;
  gap: 28px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
}
.hero-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted);
  font-weight: 500;
}
.hero-trust-item i { color: var(--success); width: 16px; height: 16px; }

/* ============================================================
   Hero Mockup
   ============================================================ */
.hero-mockup {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 28px;
  opacity: 0.95;
}
.hero-mockup-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}
.hero-mockup-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}
.hero-mockup-dot:first-child { background: #ef4444; }
.hero-mockup-dot:nth-child(2) { background: #eab308; }
.hero-mockup-dot:nth-child(3) { background: #22c55e; }
.hero-mockup-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 13.5px;
  color: var(--body);
}
.hero-mockup-row:last-child { border-bottom: none; }
.hero-mockup-row .icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-mockup-row .metric {
  margin-left: auto;
  font-weight: 700;
  color: var(--success);
}

/* Hero Visual Refined */
.hero-visual-refined {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.3;
}
.hero-blob.blue {
  width: 420px; height: 420px;
  top: -80px; right: -60px;
  background: rgba(37, 99, 235, 0.15);
}
.hero-blob.gold {
  width: 320px; height: 320px;
  bottom: -40px; right: 20%;
  background: rgba(37, 99, 235, 0.1);
}
.hero-blob.soft {
  width: 280px; height: 280px;
  top: 40%; right: 8%;
  background: rgba(37, 99, 235, 0.06);
}

/* ============================================================
   Decorative Patterns & Textures
   ============================================================ */

/* Dot pattern */
.section-dots {
  position: relative;
}
.section-dots::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.35;
  pointer-events: none;
}

/* Diagonal line pattern */
.section-diagonal {
  position: relative;
}
.section-diagonal::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 2px,
    var(--border-light) 2px,
    var(--border-light) 4px
  );
  opacity: 0.3;
  pointer-events: none;
}

/* Subtle noise texture */
.section-texture {
  position: relative;
}
.section-texture::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

/* ============================================================
   Typography Enhancements
   ============================================================ */

/* Underline highlight */
.text-highlight {
  position: relative;
  display: inline;
}
.text-highlight::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0; right: 0;
  height: 6px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 3px;
  z-index: -1;
}

/* Number accent */
.num-accent {
  font-size: 64px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.04em;
  opacity: 0.85;
}

/* Label badge */
.label-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.label-badge.blue {
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.12);
}
.label-badge.green {
  background: rgba(22, 163, 74, 0.08);
  color: var(--success);
  border: 1px solid rgba(22, 163, 74, 0.12);
}
.label-badge.amber {
  background: rgba(217, 119, 6, 0.08);
  color: var(--warning);
  border: 1px solid rgba(217, 119, 6, 0.12);
}
.label-badge.dark {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

/* ============================================================
   Feature list with icons
   ============================================================ */
.feature-list-compact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.feature-list-compact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--body);
  padding: 8px 0;
}
.feature-list-compact li i {
  color: var(--success);
  flex-shrink: 0;
  width: 16px; height: 16px;
}

/* ============================================================
   Section accent bar
   ============================================================ */
.section-accent-bar {
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  margin-bottom: 0;
  opacity: 0.15;
}

/* ============================================================
   Card with top accent
   ============================================================ */
.card-accent-top {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--primary);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}
.card-accent-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-top-color: var(--primary-hover);
}

/* ============================================================
   Highlight number row
   ============================================================ */
.highlight-row {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  padding: 32px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.highlight-item {
  flex: 1;
  min-width: 160px;
}
.highlight-item .num {
  font-size: 48px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}
.highlight-item .lbl {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

/* ============================================================
   New Card Variants — 更多质感与差异化
   ============================================================ */

/* Minimal card — 无边框无背景，仅底部细线 */
.card-minimal {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  padding: 32px 0 28px;
  transition: transform 0.3s ease, border-color 0.3s ease;
  position: relative;
}
.card-minimal:hover {
  transform: translateX(6px);
  border-color: var(--primary);
}
.card-minimal .card-number {
  position: static;
  font-size: 52px;
  font-weight: 700;
  color: var(--border-strong);
  line-height: 1;
  margin-bottom: 14px;
  opacity: 1;
  transition: color 0.3s;
  display: block;
}
.card-minimal:hover .card-number { color: var(--primary); opacity: 1; }
.card-minimal .card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 10px;
}
.card-minimal .card-desc { color: var(--muted); }

/* Stat card — 大号数据为核心 */
.card-stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
  text-align: center;
}
.card-stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-strong);
}
.card-stat .stat-value {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.card-stat .stat-value.accent {
  background: linear-gradient(135deg, var(--accent) 0%, #334155 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.card-stat .stat-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 8px;
}
.card-stat .stat-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* Step card — 水平步骤卡片 */
.card-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}
.card-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-strong);
}
.card-step .step-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  transition: background 0.3s, color 0.3s;
}
.card-step:hover .step-circle { background: var(--primary); color: #fff; }
.card-step .step-body { flex: 1; }
.card-step .step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}
.card-step .step-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* Interactive card — 顶部强调线动画 */
.card-interactive {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-interactive::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.card-interactive:hover::before { transform: scaleX(1); }

/* Soft card — 柔和辅助说明 */
.card-soft {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.3s ease;
  box-shadow: none;
}
.card-soft:hover {
  background: var(--card);
  border-color: var(--border);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* Quote card — 引用卡片 */
.card-quote {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px 32px 56px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.card-quote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.card-quote::before {
  content: """;
  position: absolute;
  top: 24px; left: 24px;
  font-size: 56px;
  line-height: 1;
  color: var(--primary);
  opacity: 0.18;
  font-family: Georgia, serif;
  font-weight: 700;
}
.card-quote p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 18px;
}
.card-quote cite {
  font-size: 14px;
  color: var(--muted);
  font-style: normal;
  font-weight: 600;
}

/* ============================================================
   Premium Card Variants — 更有质感与层次
   ============================================================ */

/* Glass card — 轻玻璃质感 */
.card-glass {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255,255,255,0.6);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.card-glass:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.8);
}

/* Spotlight card — 跟随光晕 */
.card-spotlight {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-spotlight::before {
  content: "";
  position: absolute;
  top: var(--sy, 50%);
  left: var(--sx, 50%);
  width: 280px;
  height: 280px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.card-spotlight:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.card-spotlight:hover::before { opacity: 1; }

/* Numeric card — 大号数字 + 内容 */
.card-numeric {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.card-numeric:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); }
.card-numeric .numeric {
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  opacity: 0.25;
  letter-spacing: -0.03em;
  min-width: 64px;
  text-align: center;
}
.card-numeric:hover .numeric { opacity: 0.45; }
.card-numeric .numeric-body { flex: 1; }

/* Image card — 顶部大图 */
.card-image {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.card-image:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-image .card-image-top {
  height: 180px;
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}
.card-image .card-image-top::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(15,23,42,0.15) 100%);
}
.card-image .card-image-body { padding: 28px; }

/* Float card — 悬浮感 */
.card-float {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--shadow-elevated);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.card-float:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 64px rgba(15, 23, 42, 0.14);
}

/* Dark card — 深色高端 */
.card-dark {
  background: var(--gradient-dark);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 36px 32px;
  color: rgba(255,255,255,0.85);
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
}
.card-dark:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.28);
  border-color: rgba(255,255,255,0.14);
}
.card-dark .card-title { color: #fff; }
.card-dark .card-desc { color: rgba(255,255,255,0.65); }
.card-dark .card-icon { background: rgba(255,255,255,0.1); color: #fff; }
.card-dark .card-price-hint { color: #93c5fd; }
.card-dark .card-tags .card-tag { background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.75); border-color: rgba(255,255,255,0.1); }
.card-dark .card-tags .card-tag.hot { background: rgba(255,255,255,0.12); color: #fff; }
.card-dark .card-tags .card-tag.new { background: rgba(147, 197, 253, 0.15); color: #93c5fd; }

/* ============================================================
   Typography & Utility Enhancements
   ============================================================ */

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.text-gradient-dark {
  background: linear-gradient(135deg, #0f172a 0%, #475569 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.text-muted { color: var(--muted); }
.text-body { color: var(--body); }
.text-title { color: var(--title); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}
.link-arrow:hover { gap: 10px; }

.btn-shine {
  position: relative;
  overflow: hidden;
}
.btn-shine::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s;
}
.btn-shine:hover::after { left: 140%; }

/* ============================================================
   Section Background Variants — 让每一屏都有变化
   ============================================================ */

.section-aurora {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(37, 99, 235, 0.04) 0%, transparent 45%),
    var(--bg);
  position: relative;
}
.section-aurora::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--texture-dot);
  background-size: 32px 32px;
  opacity: 0.25;
  pointer-events: none;
}

.section-grid {
  background: var(--bg);
  position: relative;
}
.section-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--texture-grid);
  background-size: 64px 64px;
  opacity: 0.25;
  pointer-events: none;
}

.section-glow {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.section-glow::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px; height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.section-warm {
  background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

/* Decorative elements */
.glow-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.25), transparent);
  margin: 24px 0;
}

.ornament {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted-light);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ornament::before,
.ornament::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--border-strong);
}

/* Grain texture overlay */
.texture-grain {
  position: relative;
}
.texture-grain::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.7;
}

/* ============================================================
   Mini Components
   ============================================================ */

.mini-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 13px;
  color: var(--body);
}
.mini-stat strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
}

.stat-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-comparison-item {
  background: var(--card);
  padding: 32px 24px;
  text-align: center;
}
.stat-comparison-item:first-child { background: var(--bg-soft); }
.stat-comparison-item .number {
  font-size: 42px;
  font-weight: 700;
  color: var(--title);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}
.stat-comparison-item:first-child .number { color: var(--muted); }
.stat-comparison-item:last-child .number { color: var(--primary); }
.stat-comparison-item .label {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

/* ============================================================
   Section Variants — 章节差异化
   ============================================================ */

/* Section lead — 更大的引导标题 */
.section-lead {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 72px;
}
.section-lead .section-label {
  justify-content: center;
}
.section-lead .section-title {
  font-size: 42px;
  margin-bottom: 20px;
}
.section-lead .section-desc {
  font-size: 18px;
  color: var(--muted);
  line-height: 1.8;
}

/* Decorative section dividers */
.section-divider-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: 0 auto 24px;
}
.section-divider-zigzag {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 0 auto 24px;
  color: var(--border-strong);
}
.section-divider-zigzag::before,
.section-divider-zigzag::after {
  content: "";
  flex: 1;
  max-width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong));
}
.section-divider-zigzag::after {
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* Section surface — 极淡纹理背景 */
.section-surface {
  background:
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 50%, var(--bg-soft) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  position: relative;
}
.section-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.03) 0%, transparent 40%);
  pointer-events: none;
}

/* ============================================================
   Data Visualization Components
   ============================================================ */

/* Metric row — 横向指标 */
.metric-row {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow-sm);
}
.metric-item {
  flex: 1;
  text-align: center;
  padding: 36px 24px;
  position: relative;
}
.metric-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--border-light);
}
.metric-item .metric-value {
  font-size: 38px;
  font-weight: 700;
  color: var(--title);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.metric-item .metric-value.primary { color: var(--primary); }
.metric-item .metric-label {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-muted);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}
.progress-bar .progress-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  transition: width 0.8s ease;
}
.progress-bar .progress-fill.success { background: linear-gradient(90deg, var(--success), #22c55e); }
.progress-bar .progress-fill.muted { background: linear-gradient(90deg, var(--border-strong), var(--muted-light)); }
.progress-bar .progress-fill.glow {
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.35);
}

/* Progress ring */
.progress-ring {
  position: relative;
  width: 120px; height: 120px;
  margin: 0 auto;
}
.progress-ring svg { transform: rotate(-90deg); }
.progress-ring circle {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
}
.progress-ring .ring-track { stroke: var(--bg-muted); }
.progress-ring .ring-fill { stroke: var(--primary); transition: stroke-dashoffset 0.8s ease; }
.progress-ring .ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--title);
}

/* Comparison cards — 左右对比 */
.comparison-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.comparison-card {
  padding: 40px 36px;
  background: var(--card);
}
.comparison-card.negative {
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
}
.comparison-card.positive {
  background: var(--card);
  position: relative;
}
.comparison-card.positive::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
}
.comparison-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.comparison-card.negative h3 { color: var(--muted); }
.comparison-card h3 i { width: 24px; height: 24px; }
.comparison-card.negative h3 i { color: var(--muted-light); }
.comparison-card.positive h3 i { color: var(--success); }
.comparison-card ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.comparison-card li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--body);
  line-height: 1.6;
}
.comparison-card li i {
  flex-shrink: 0;
  margin-top: 3px;
  width: 18px; height: 18px;
}
.comparison-card.negative li i { color: var(--muted-light); }
.comparison-card.positive li i { color: var(--success); }

/* Channel orbit — 渠道接入视觉 */
.channel-orbit {
  position: relative;
  width: 360px; height: 360px;
  margin: 0 auto;
}
.channel-orbit .orbit-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.channel-orbit .center-node {
  width: 96px; height: 96px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.25);
  z-index: 2;
  animation: center-pulse 3s ease-in-out infinite;
}
.channel-orbit .orbit-ring {
  position: absolute;
  inset: 30px;
  border-radius: 50%;
  border: 1px dashed var(--border-strong);
  animation: channel-spin 25s linear infinite;
}
.channel-orbit .orbit-node {
  position: absolute;
  width: 56px; height: 56px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 22px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  animation: node-bob 4s ease-in-out infinite;
}
.channel-orbit .orbit-node:hover { color: var(--primary); border-color: var(--primary); transform: scale(1.12); }
.hero-visual .channel-orbit {
  position: absolute;
  top: 50%;
  right: 12%;
  transform: translateY(-50%);
  margin: 0;
  filter: drop-shadow(0 0 24px rgba(37, 99, 235, 0.12));
}
.channel-orbit .orbit-ring.second {
  inset: -20px;
  border-style: solid;
  border-color: rgba(37, 99, 235, 0.2);
  animation-duration: 40s;
  animation-direction: reverse;
  opacity: 0.7;
}
@keyframes channel-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes center-pulse { 0%, 100% { box-shadow: 0 12px 32px rgba(37, 99, 235, 0.25); transform: scale(1); } 50% { box-shadow: 0 16px 44px rgba(37, 99, 235, 0.4); transform: scale(1.04); } }
@keyframes node-bob { 0%, 100% { transform: translate(-50%, -50%) translateY(0); } 50% { transform: translate(-50%, -50%) translateY(-6px); } }

/* Channel grid — 图标网格 + 连线 */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}
.channel-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
  background-size: 100% 50%, 25% 100%;
  opacity: 0.5;
  pointer-events: none;
}
.channel-item {
  position: relative;
  z-index: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}
.channel-item:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-card-hover);
}
.channel-item i {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 10px;
}
.channel-item span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--title);
}
.channel-center {
  grid-column: span 4;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 28px;
  background: linear-gradient(135deg, var(--primary-soft), rgba(37, 99, 235, 0.04));
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius);
  margin-top: 8px;
}
.channel-center i { font-size: 32px; color: var(--primary); }
.channel-center span { font-size: 16px; font-weight: 700; color: var(--title); }

/* ============================================================
   Pricing Variants
   ============================================================ */

/* Featured pricing — 更突出 */
.pricing-card.featured {
  border-color: rgba(37, 99, 235, 0.35);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.04) 0%, var(--card) 30%);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.08), 0 12px 36px rgba(37, 99, 235, 0.1);
  transform: translateY(-8px);
}
.pricing-card.featured:hover {
  transform: translateY(-12px);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.12), 0 20px 48px rgba(37, 99, 235, 0.14);
}
.pricing-card.featured .pricing-name { color: var(--primary); }

/* Dark pricing — 高端套餐 */
.pricing-card.dark {
  background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
  border-color: rgba(255, 255, 255, 0.08);
  color: #fff;
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.25);
}
.pricing-card.dark .pricing-name { color: #fff; }
.pricing-card.dark .pricing-target { color: rgba(255,255,255,0.65); }
.pricing-card.dark .pricing-price { color: #fff; }
.pricing-card.dark .pricing-price span { color: rgba(255,255,255,0.55); }
.pricing-card.dark .pricing-note {
  color: rgba(255,255,255,0.55);
  border-bottom-color: rgba(255,255,255,0.1);
}
.pricing-card.dark .pricing-features li { color: rgba(255,255,255,0.85); }
.pricing-card.dark .pricing-features li i { color: #60a5fa; }
.pricing-card.dark:hover {
  transform: translateY(-5px);
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.35);
  border-color: rgba(255, 255, 255, 0.15);
}
.pricing-card.dark .btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.pricing-card.dark .btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.55);
}
.pricing-card.dark .btn-primary {
  background: #fff;
  color: var(--accent);
}
.pricing-card.dark .btn-primary:hover {
  background: var(--bg-soft);
}

/* Bordered pricing — 强边框风格 */
.pricing-card.bordered {
  border: 2px solid var(--border);
  box-shadow: none;
}
.pricing-card.bordered:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-card-hover);
}

/* Starter pricing — 清新浅色 */
.pricing-card.starter {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  box-shadow: none;
}
.pricing-card.starter:hover {
  background: var(--card);
  border-color: var(--border);
  box-shadow: var(--shadow-card-hover);
}
.pricing-card.starter .pricing-name { color: var(--success); }

/* ============================================================
   CTA Variants
   ============================================================ */

/* Dark CTA */
.cta-section.dark {
  background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
}
.cta-section.dark::before {
  background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
}
.cta-section.dark .section-title { color: #fff; }
.cta-section.dark .section-desc { color: rgba(255,255,255,0.7); }
.cta-section.dark .btn-primary {
  background: #fff;
  color: var(--accent);
}
.cta-section.dark .btn-primary:hover { background: var(--bg-soft); }
.cta-section.dark .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.cta-section.dark .btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.55);
}

/* Gradient CTA */
.cta-section.gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: #fff;
}
.cta-section.gradient::before { display: none; }
.cta-section.gradient .section-title { color: #fff; }
.cta-section.gradient .section-desc { color: rgba(255,255,255,0.85); }
.cta-section.gradient .btn-primary {
  background: #fff;
  color: var(--primary);
}
.cta-section.gradient .btn-primary:hover { background: var(--bg-soft); }
.cta-section.gradient .btn-secondary {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.cta-section.gradient .btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.55);
}

/* CTA box — 左右分栏 */
.cta-box {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 64px;
  box-shadow: var(--shadow-lg);
  text-align: left;
}
.cta-box .cta-content h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.cta-box .cta-content p {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}
.cta-box .cta-actions {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================================
   Chat Demo — 内容区对话模拟
   ============================================================ */
.chat-demo {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  max-width: 520px;
  margin: 0 auto;
}
.chat-demo-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}
.chat-demo-header .avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.chat-demo-header .info { flex: 1; }
.chat-demo-header .info strong { display: block; font-size: 14px; color: var(--title); }
.chat-demo-header .info span { font-size: 12px; color: var(--success); }
.chat-demo-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.chat-demo-msg {
  max-width: 82%;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
  animation: demo-pop 0.5s ease both;
}
.chat-demo-msg.user {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-demo-msg.ai {
  align-self: flex-start;
  background: var(--bg-soft);
  color: var(--body);
  border: 1px solid var(--border-light);
  border-bottom-left-radius: 4px;
}
.chat-demo-msg:nth-child(1) { animation-delay: 0.1s; }
.chat-demo-msg:nth-child(2) { animation-delay: 0.3s; }
.chat-demo-msg:nth-child(3) { animation-delay: 0.5s; }
.chat-demo-msg:nth-child(4) { animation-delay: 0.7s; }
@keyframes demo-pop {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Animations
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

.card-glow { position: relative; }
.card-glow::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(500px circle at var(--mx, 50%) var(--my, 50%),
    rgba(37, 99, 235, 0.05), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.card-glow:hover::after { opacity: 1; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
  .pricing-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .menu-toggle { display: block; }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 16px 24px 32px;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
  }
  .nav.open { transform: translateX(0); }
  .nav a {
    display: block;
    width: 100%;
    padding: 15px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }
  .nav-cta { margin-top: 16px; margin-left: 0; text-align: center; width: 100%; }

  .hero { padding: 140px 0 90px; }
  .hero-title { font-size: 40px; }
  .hero-visual { opacity: 0.3; }
  .hero-mockup { display: none; }

  .section { padding: 80px 0; }
  .section-title { font-size: 28px; }

  .grid-2, .grid-3, .grid-4, .grid-5,
  .pricing-grid, .pricing-grid-4,
  .stats-grid, .bento,
  .outcome-grid, .agent-value-grid,
  .agent-profit-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento .card.large,
  .bento .card.tall { grid-column: span 1; grid-row: span 1; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-links { display: grid; grid-template-columns: repeat(2, 1fr); }
  .footer-top { flex-direction: column; }

  /* New component responsive */
  .section-lead .section-title { font-size: 32px; }
  .metric-row { flex-wrap: wrap; }
  .metric-item { flex: 1 1 45%; padding: 28px 16px; border-bottom: 1px solid var(--border-light); }
  .metric-item:not(:last-child)::after { display: none; }
  .metric-item:nth-last-child(-n+2) { border-bottom: none; }
  .comparison-cards { grid-template-columns: 1fr; }
  .comparison-card.negative { border-right: none; border-bottom: 1px solid var(--border); }
  .channel-grid { grid-template-columns: repeat(3, 1fr); }
  .channel-center { grid-column: span 3; }
  .cta-box { grid-template-columns: 1fr; text-align: center; padding: 40px 32px; }
  .cta-box .cta-actions { justify-content: center; }
  .product-matrix .product-card { grid-column: span 3 !important; }
  .stat-comparison { grid-template-columns: 1fr; }
  .stat-comparison-item:first-child { border-bottom: 1px solid var(--border); }
  .card-numeric { flex-direction: column; gap: 12px; }
  .card-numeric .numeric { min-width: auto; text-align: left; }
}

@media (max-width: 600px) {
  .hero { padding: 120px 0 72px; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 16px; }
  .hero-visual { display: none; }
  .hero-visual-refined { display: none; }
  .hero-trust-bar { gap: 12px; padding-top: 24px; margin-top: 32px; }
  .hero-trust-item { font-size: 12.5px; }

  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }

  .grid-2, .grid-3, .grid-4, .grid-5,
  .pricing-grid, .pricing-grid-4,
  .stats-grid, .form-row, .bento,
  .footer-links, .outcome-grid,
  .agent-value-grid, .agent-profit-cards {
    grid-template-columns: 1fr;
  }

  .agent-banner-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .agent-highlight { padding: 32px 24px; }

  .case-card.horizontal {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .case-card.horizontal .case-summary {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-right: 0;
    padding-bottom: 24px;
    align-items: flex-start;
    text-align: left;
  }
  .case-card.horizontal .case-logo { margin-bottom: 12px; }
  .case-card.horizontal .case-metrics { gap: 24px; }

  .hero-float-badge { display: none; }

  .timeline { padding-left: 28px; }
  .timeline::before { left: 7px; }
  .timeline-step::before { left: -24px; width: 18px; height: 18px; }
  .timeline-step .step-number { left: -19px; top: 4px; font-size: 9px; }
  .agent-highlight h2 { font-size: 24px; }

  .pricing-card { padding: 28px 24px; }
  .pricing-card.featured { transform: translateY(0); }
  .pricing-card.featured:hover { transform: translateY(-4px); }
  .contact-form { padding: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .case-metrics { gap: 16px; }
  .trust-badges { gap: 16px; }
  .roi-hint { flex-direction: column; align-items: flex-start; }
  .contact-reasons { grid-template-columns: 1fr; }

  /* New component mobile */
  .section-lead { margin-bottom: 48px; }
  .section-lead .section-title { font-size: 28px; }
  .value-card.elevated { padding: 32px 28px; }
  .card-minimal { padding: 24px 0; }
  .card-stat .stat-value { font-size: 42px; }
  .card-step { flex-direction: column; gap: 16px; }
  .card-quote { padding: 28px 24px 24px 44px; }
  .card-quote::before { top: 16px; left: 16px; font-size: 42px; }
  .metric-row { flex-direction: column; }
  .metric-item { flex: 1 1 100%; border-bottom: 1px solid var(--border-light); padding: 24px 16px; }
  .metric-item:last-child { border-bottom: none; }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .channel-center { grid-column: span 2; }
  .cta-box { padding: 32px 24px; }
  .cta-box .cta-content h2 { font-size: 24px; }
  .cta-box .cta-actions { flex-direction: column; width: 100%; }
  .cta-box .cta-actions .btn { width: 100%; }
  .product-matrix .product-card { grid-column: span 6 !important; }
  .card-float { padding: 28px 24px; }
  .card-glass { padding: 28px 24px; backdrop-filter: blur(12px) saturate(140%); }
  .card-image .card-image-top { height: 140px; }
  .stat-comparison-item .number { font-size: 32px; }
}