/* ============================================================
   GEMSPONSOR.COM — DARK TECH DESIGN SYSTEM
   参照 TryAI 风格：深色背景 + 霓虹光效 + 玻璃态 + 粒子科技感
   ============================================================ */

/* ── 1. CSS 设计令牌 ───────────────────────────────────────── */
:root {
  /* 品牌色 */
  --gem-purple:    #a855f7;
  --gem-purple-d:  #7c3aed;
  --gem-purple-xl: rgba(168,85,247,.12);
  --gem-blue:      #38bdf8;
  --gem-blue-d:    #0ea5e9;
  --gem-blue-xl:   rgba(56,189,248,.12);
  --gem-cyan:      #22d3ee;
  --gem-teal:      #2dd4bf;
  --gem-green:     #4ade80;
  --gem-green-xl:  rgba(74,222,128,.12);
  --gem-orange:    #fb923c;
  --gem-pink:      #f472b6;
  --gem-indigo:    #818cf8;

  /* 背景系统 */
  --bg-deep:    #020817;
  --bg-dark:    #050d1a;
  --bg-card:    rgba(8,20,42,0.85);
  --bg-card-h:  rgba(12,28,56,0.95);
  --bg-glass:   rgba(255,255,255,0.04);
  --bg-glass-h: rgba(255,255,255,0.08);

  /* 渐变 */
  --grad-brand:   linear-gradient(135deg,#a855f7 0%,#6366f1 50%,#38bdf8 100%);
  --grad-hero:    linear-gradient(135deg,#7c3aed 0%,#4f46e5 40%,#0ea5e9 100%);
  --grad-glow:    linear-gradient(135deg,rgba(168,85,247,.3) 0%,rgba(99,102,241,.2) 50%,rgba(56,189,248,.3) 100%);
  --grad-neon:    linear-gradient(90deg,#a855f7,#38bdf8,#4ade80,#a855f7);

  /* 文字 */
  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;
  --text-accent:    #a855f7;

  /* 边框 */
  --border-glass:   rgba(255,255,255,0.08);
  --border-glow:    rgba(168,85,247,0.35);
  --border-neon:    rgba(56,189,248,0.35);

  /* 霓虹阴影 */
  --neon-purple:  0 0 20px rgba(168,85,247,.5), 0 0 60px rgba(168,85,247,.15);
  --neon-blue:    0 0 20px rgba(56,189,248,.5),  0 0 60px rgba(56,189,248,.15);
  --neon-green:   0 0 20px rgba(74,222,128,.5),  0 0 60px rgba(74,222,128,.15);
  --shadow-card:  0 8px 40px rgba(0,0,0,.6), 0 2px 8px rgba(0,0,0,.4);
  --shadow-brand: 0 8px 32px rgba(168,85,247,.4);

  /* 圆角 */
  --r-sm:   8px;
  --r-md:   14px;
  --r-lg:   20px;
  --r-xl:   28px;
  --r-full: 9999px;

  /* 间距 */
  --section-py: 100px;
  --container:  1280px;

  /* 动画 */
  --ease-out-expo: cubic-bezier(0.16,1,0.3,1);
  --ease-spring:   cubic-bezier(0.34,1.56,0.64,1);
  --ease-bounce:   cubic-bezier(0.68,-0.55,0.265,1.55);
  --dur-fast: 180ms;
  --dur-mid:  320ms;
  --dur-slow: 600ms;
}

/* ── 2. 基础重置 ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; }
a { text-decoration: none; color: inherit; }

/* ── 3. 滚动条 ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg,#a855f7,#38bdf8);
  border-radius: var(--r-full);
}

/* ── 4. 容器 ────────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* ── 5. 排版 ────────────────────────────────────────────────── */
.display-xl { font-size: clamp(40px,6vw,80px); font-weight: 900; line-height: 1.05; letter-spacing: -0.03em; }
.display-lg { font-size: clamp(32px,4vw,56px); font-weight: 800; line-height: 1.1;  letter-spacing: -0.025em; }
.display-md { font-size: clamp(24px,3vw,40px); font-weight: 700; line-height: 1.2;  letter-spacing: -0.02em; }
.mono { font-family: 'JetBrains Mono','Fira Code',monospace; }

/* ── 6. 渐变文字 ────────────────────────────────────────────── */
.text-gradient {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-neon {
  background: linear-gradient(135deg,#a855f7,#38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 12px rgba(168,85,247,.4));
}

/* ── 7. 按钮系统 ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--dur-mid) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--dur-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.08); }

.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 48px rgba(168,85,247,.55);
}
.btn-primary:active { transform: translateY(0) scale(1); }

.btn-secondary {
  background: var(--bg-glass);
  color: var(--gem-blue);
  border: 1px solid var(--border-neon);
  backdrop-filter: blur(12px);
}
.btn-secondary:hover {
  background: var(--bg-glass-h);
  border-color: var(--gem-blue);
  transform: translateY(-2px);
  box-shadow: var(--neon-blue);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-glass);
}
.btn-ghost:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
  border-color: var(--border-glow);
}

.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-xl { padding: 18px 44px; font-size: 17px; }

/* 波纹 */
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transform: scale(0);
  animation: rippleAnim 0.55s ease-out forwards;
  pointer-events: none;
}
@keyframes rippleAnim { to { transform: scale(4); opacity: 0; } }

/* ── 8. Section 标签 ────────────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px;
  border-radius: var(--r-full);
  background: var(--gem-purple-xl);
  border: 1px solid rgba(168,85,247,.25);
  color: var(--gem-purple);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.section-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gem-purple);
  box-shadow: 0 0 8px var(--gem-purple);
  animation: dotPulse 1.8s ease infinite;
}
@keyframes dotPulse {
  0%,100% { opacity:1; transform:scale(1); box-shadow: 0 0 8px var(--gem-purple); }
  50%      { opacity:.4; transform:scale(.6); box-shadow: none; }
}

/* ── 9. 通用卡片 ─────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(20px);
  transition: all var(--dur-mid) var(--ease-out-expo);
}
.card:hover {
  background: var(--bg-card-h);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 30px rgba(168,85,247,.12);
  transform: translateY(-4px);
}

/* ── 10. 标签徽章 ───────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  font-size: 11px;
  font-weight: 600;
}
.badge-purple { background:rgba(168,85,247,.15); color:#c084fc; border: 1px solid rgba(168,85,247,.25); }
.badge-blue   { background:rgba(56,189,248,.12);  color:#7dd3fc; border: 1px solid rgba(56,189,248,.25); }
.badge-green  { background:rgba(74,222,128,.12);  color:#86efac; border: 1px solid rgba(74,222,128,.25); }
.badge-orange { background:rgba(251,146,60,.12);  color:#fdba74; border: 1px solid rgba(251,146,60,.25); }
.badge-pink   { background:rgba(244,114,182,.12); color:#f9a8d4; border: 1px solid rgba(244,114,182,.25); }
.badge-gray   { background:rgba(255,255,255,.06); color:#94a3b8; border: 1px solid rgba(255,255,255,.1); }

/* ── 11. 进度条 ─────────────────────────────────────────────── */
.progress-track {
  height: 5px;
  background: rgba(255,255,255,.06);
  border-radius: var(--r-full);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: var(--r-full);
  background: var(--grad-brand);
  width: 0;
  transition: width 1.6s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}
.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,transparent 0%,rgba(255,255,255,.5) 50%,transparent 100%);
  animation: shimmer 2s ease infinite;
}
@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}
.progress-fill.blue   { background: linear-gradient(90deg,#0ea5e9,#38bdf8); }
.progress-fill.green  { background: linear-gradient(90deg,#059669,#4ade80); }
.progress-fill.orange { background: linear-gradient(90deg,#ea580c,#fb923c); }
.progress-fill.pink   { background: linear-gradient(90deg,#db2777,#f472b6); }
.progress-fill.teal   { background: linear-gradient(90deg,#0d9488,#2dd4bf); }

/* ── 12. 滚动动画 ───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s var(--ease-out-expo), transform .7s var(--ease-out-expo);
}
.reveal.reveal-left  { transform: translateX(-32px); }
.reveal.reveal-right { transform: translateX(32px); }
.reveal.reveal-scale { transform: scale(.93); }
.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* ── 13. 滚动进度条 ─────────────────────────────────────────── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: var(--grad-neon);
  background-size: 200% 100%;
  z-index: 9999;
  width: 0%;
  transition: width .12s linear;
  animation: neonFlow 3s linear infinite;
}
@keyframes neonFlow {
  0%   { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* ── 14. 回顶按钮 ────────────────────────────────────────────── */
#back-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  box-shadow: var(--shadow-brand);
  cursor: pointer;
  z-index: 90;
  opacity: 0; pointer-events: none;
  transform: translateY(12px);
  transition: all var(--dur-mid) var(--ease-out-expo);
  border: none;
}
#back-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
#back-top:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(168,85,247,.6); }

/* ═══════════════════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all var(--dur-mid) ease;
}
.navbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: padding var(--dur-mid) ease;
}
#navbar.scrolled .navbar-inner { padding-top: 12px; padding-bottom: 12px; }
#navbar.scrolled {
  background: rgba(2,8,23,.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 4px 32px rgba(0,0,0,.5);
}

/* Logo */
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.logo-gem { width: 38px; height: 38px; position: relative; }
.logo-gem svg { width: 100%; height: 100%; filter: drop-shadow(0 0 8px rgba(168,85,247,.6)); }
.logo-text {
  font-size: 20px; font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.logo-text .gem-part {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Nav links */
.nav-links {
  display: flex; align-items: center;
  gap: 4px; list-style: none;
}
.nav-links a {
  padding: 7px 14px;
  border-radius: var(--r-full);
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--dur-fast) ease;
}
.nav-links a:hover {
  color: var(--gem-purple);
  background: var(--gem-purple-xl);
}
.nav-links a.active {
  color: var(--gem-purple);
  background: var(--gem-purple-xl);
}

/* Mobile */
.nav-mobile-btn {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.nav-mobile-btn:hover { background: var(--bg-glass-h); }
.nav-mobile-btn span {
  width: 20px; height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all var(--dur-mid) ease;
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-btn { display: flex; }
  .nav-cta { display: none; }
}

/* ═══════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
  background: var(--bg-deep);
}

/* 粒子画布 */
#particle-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

/* 背景光晕 */
.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none; overflow: hidden;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .18;
  animation: orbFloat 12s ease-in-out infinite;
}
.hero-orb-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle,#7c3aed,transparent 70%);
  top: -200px; right: -150px;
  animation-delay: 0s;
}
.hero-orb-2 {
  width: 600px; height: 600px;
  background: radial-gradient(circle,#0ea5e9,transparent 70%);
  bottom: -150px; left: -100px;
  animation-delay: -5s;
}
.hero-orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle,#4ade80,transparent 70%);
  top: 45%; left: 45%;
  animation-delay: -9s;
  opacity: .08;
}
@keyframes orbFloat {
  0%,100% { transform: scale(1) translate(0,0); }
  33%      { transform: scale(1.1) translate(25px,-25px); }
  66%      { transform: scale(.92) translate(-20px,20px); }
}

/* 网格 */
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(168,85,247,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168,85,247,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridDrift 40s linear infinite;
}
@keyframes gridDrift {
  0%   { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}

/* 扫描线 */
.hero-scanline {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(168,85,247,.012) 2px,
    rgba(168,85,247,.012) 4px
  );
  pointer-events: none;
}

/* Hero 内容 */
.hero-content {
  position: relative; z-index: 3;
  text-align: center;
  max-width: 900px; margin: 0 auto;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 18px;
  border-radius: var(--r-full);
  background: rgba(168,85,247,.1);
  border: 1px solid rgba(168,85,247,.3);
  color: #c084fc;
  font-size: 12px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  margin-bottom: 30px;
  animation: badgeIn .9s var(--ease-out-expo) both;
  backdrop-filter: blur(12px);
}
.hero-badge .live-dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(74,222,128,.5);
  animation: livePulse 1.8s ease infinite;
}
@keyframes livePulse {
  0%  { box-shadow: 0 0 0 0 rgba(74,222,128,.5); }
  70% { box-shadow: 0 0 0 8px rgba(74,222,128,0); }
  100%{ box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}
@keyframes badgeIn {
  from { opacity:0; transform:translateY(-20px) scale(.9); }
  to   { opacity:1; transform:translateY(0) scale(1); }
}

.hero-headline {
  font-size: clamp(46px, 7.5vw, 92px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.038em;
  color: var(--text-primary);
  margin-bottom: 28px;
  animation: headlineIn .9s var(--ease-out-expo) .12s both;
}
@keyframes headlineIn {
  from { opacity:0; transform:translateY(28px); }
  to   { opacity:1; transform:translateY(0); }
}

.hero-typewriter {
  display: block;
  min-height: 1.1em;
}
.typewriter-cursor {
  display: inline-block; width: 3px; height: .85em;
  background: var(--gem-purple);
  margin-left: 4px; vertical-align: middle;
  animation: cursorBlink .9s ease infinite;
  box-shadow: 0 0 8px var(--gem-purple);
}
@keyframes cursorBlink {
  0%,49% { opacity:1; }
  50%,100%{ opacity:0; }
}

.hero-sub {
  font-size: clamp(16px,2vw,20px);
  color: var(--text-secondary);
  line-height: 1.68;
  max-width: 680px;
  margin: 0 auto 40px;
  animation: fadeUp .9s var(--ease-out-expo) .25s both;
}
.hero-sub strong { color: var(--gem-blue); }
@keyframes fadeUp {
  from { opacity:0; transform:translateY(18px); }
  to   { opacity:1; transform:translateY(0); }
}

.hero-actions {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; flex-wrap: wrap;
  margin-bottom: 72px;
  animation: fadeUp .9s var(--ease-out-expo) .38s both;
}

/* Hero 数字统计 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  max-width: 820px; margin: 0 auto;
  background: var(--border-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl);
  overflow: hidden;
  animation: fadeUp .9s var(--ease-out-expo) .5s both;
}
.hero-stat {
  background: var(--bg-card);
  padding: 26px 18px;
  text-align: center;
  transition: background var(--dur-mid) ease;
}
.hero-stat:hover { background: var(--bg-card-h); }
.hero-stat-num {
  font-size: clamp(22px,3.5vw,36px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1; margin-bottom: 5px;
  font-family: 'JetBrains Mono', monospace;
}
.hero-stat-num.purple { color: var(--gem-purple); text-shadow: 0 0 20px rgba(168,85,247,.4); }
.hero-stat-num.blue   { color: var(--gem-blue);   text-shadow: 0 0 20px rgba(56,189,248,.4); }
.hero-stat-num.green  { color: var(--gem-green);  text-shadow: 0 0 20px rgba(74,222,128,.4); }
.hero-stat-num.orange { color: var(--gem-orange); text-shadow: 0 0 20px rgba(251,146,60,.4); }
.hero-stat-label { font-size: 11px; color: var(--text-muted); line-height: 1.4; }
@media (max-width: 640px) {
  .hero-stats { grid-template-columns: repeat(2,1fr); }
}

/* 浮动徽章 */
.hero-floating-badges {
  position: absolute; inset: 0;
  pointer-events: none; z-index: 2;
}
.float-badge {
  position: absolute;
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card), 0 0 20px rgba(168,85,247,.1);
  font-size: 12px; font-weight: 600;
  color: var(--text-secondary); white-space: nowrap;
  backdrop-filter: blur(16px);
}
.float-badge .badge-icon { font-size: 15px; }
.float-badge-1 { top: 22%; left: 4%;   animation: floatY 6s ease-in-out infinite; }
.float-badge-2 { top: 34%; right: 3%;  animation: floatY 7s ease-in-out infinite .8s; }
.float-badge-3 { bottom: 26%; left: 5%;animation: floatY 8s ease-in-out infinite 1.6s; }
.float-badge-4 { bottom: 20%; right: 4%;animation: floatY 6.5s ease-in-out infinite 2.4s; }
@keyframes floatY {
  0%,100% { transform: translateY(0) rotate(0); }
  50%      { transform: translateY(-12px) rotate(.5deg); }
}
@media (max-width: 1000px) { .hero-floating-badges { display: none; } }

/* 向下滚动 */
.scroll-hint {
  position: absolute; bottom: 28px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--text-muted); font-size: 10px;
  letter-spacing: .1em; text-transform: uppercase;
  animation: fadeUp 1s var(--ease-out-expo) 1.2s both;
}
.scroll-hint-wheel {
  width: 22px; height: 34px;
  border: 2px solid rgba(255,255,255,.15);
  border-radius: 11px; position: relative;
}
.scroll-hint-wheel::after {
  content: ''; position: absolute;
  top: 6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 6px;
  background: var(--gem-purple); border-radius: 2px;
  box-shadow: 0 0 6px var(--gem-purple);
  animation: wheelScroll 1.6s ease infinite;
}
@keyframes wheelScroll {
  0%  { top:6px; opacity:1; }
  80% { top:16px; opacity:0; }
  100%{ top:6px; opacity:0; }
}

/* ═══════════════════════════════════════════════════════
   SECTION HEADER (通用)
═══════════════════════════════════════════════════════ */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { margin-bottom: 16px; }
.section-header p {
  font-size: 17px; color: var(--text-secondary);
  max-width: 620px; margin: 0 auto; line-height: 1.7;
}

/* ═══════════════════════════════════════════════════════
   PARADIGM — 范式转移
═══════════════════════════════════════════════════════ */
.paradigm { background: var(--bg-dark); padding: var(--section-py) 0; }

.era-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 16px; margin-bottom: 48px;
}
@media (max-width: 900px) { .era-grid { grid-template-columns: 1fr; } }

.era-card {
  border-radius: var(--r-xl);
  padding: 28px;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  transition: all var(--dur-mid) var(--ease-out-expo);
  position: relative; overflow: hidden;
  backdrop-filter: blur(20px);
}
.era-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
}
.era-card.past::before   { background: rgba(148,163,184,.4); }
.era-card.mid::before    { background: linear-gradient(90deg,#7c3aed,#818cf8); }
.era-card.current::before{ background: var(--grad-brand); box-shadow: 0 0 12px rgba(168,85,247,.5); }
.era-card:hover {
  background: var(--bg-card-h);
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), 0 0 30px rgba(168,85,247,.12);
}
.era-card.current {
  background: linear-gradient(145deg,rgba(168,85,247,.08),rgba(56,189,248,.06));
  border-color: rgba(168,85,247,.25);
  box-shadow: var(--shadow-card), 0 0 40px rgba(168,85,247,.1);
}

.era-period { font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px; }
.era-card.past    .era-period { color: var(--text-muted); }
.era-card.mid     .era-period { color: var(--gem-indigo); }
.era-card.current .era-period { color: var(--gem-purple); }

.era-title { font-size: 22px; font-weight: 800; letter-spacing: -.02em; margin-bottom: 10px; color: var(--text-primary); }
.era-card.past .era-title { color: var(--text-secondary); }
.era-desc  { font-size: 13px; color: var(--text-secondary); line-height: 1.65; margin-bottom: 16px; }
.era-tags  { display: flex; flex-wrap: wrap; gap: 6px; }
.era-now-badge {
  position: absolute; top: 16px; right: 16px;
  background: var(--grad-brand); color: #fff;
  padding: 3px 10px; border-radius: var(--r-full);
  font-size: 10px; font-weight: 800; letter-spacing: .1em;
  animation: nowGlow 2s ease infinite;
}
@keyframes nowGlow {
  0%,100% { box-shadow: 0 0 0 0 rgba(168,85,247,.4); }
  50%      { box-shadow: 0 0 16px 4px rgba(168,85,247,.2); }
}

/* 图表容器 */
.chart-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl);
  padding: 32px; box-shadow: var(--shadow-card);
  display: flex; gap: 32px; align-items: flex-start;
  backdrop-filter: blur(20px);
}
@media (max-width:900px) { .chart-panel { flex-direction:column; } }
.chart-panel-main { flex: 1; min-width: 0; }
.chart-panel-side { width: 220px; flex-shrink: 0; display: flex; flex-direction: column; gap: 12px; }
@media (max-width:900px) { .chart-panel-side { width:100%; flex-direction:row; flex-wrap:wrap; } }

.metric-pill {
  padding: 14px 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border-glass);
  background: var(--bg-glass);
  transition: all var(--dur-mid) ease;
}
.metric-pill:hover { background: var(--bg-glass-h); border-color: var(--border-glow); }
.metric-pill .metric-val { font-size: 26px; font-weight: 900; letter-spacing: -.03em; line-height:1; font-family: 'JetBrains Mono', monospace; }
.metric-pill .metric-lbl { font-size: 11px; color: var(--text-muted); margin-top: 4px; line-height:1.4; }
.metric-pill.neg .metric-val { color: #f87171; text-shadow: 0 0 12px rgba(248,113,113,.4); }
.metric-pill.pos .metric-val { color: var(--gem-green); text-shadow: 0 0 12px rgba(74,222,128,.4); }

/* ═══════════════════════════════════════════════════════
   FEATURES — 核心功能
═══════════════════════════════════════════════════════ */
.features { background: var(--bg-deep); padding: var(--section-py) 0; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 16px;
}
@media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px)  { .features-grid { grid-template-columns: 1fr; } }

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: all var(--dur-mid) var(--ease-out-expo);
  cursor: pointer; position: relative; overflow: hidden;
  backdrop-filter: blur(20px);
}
.feature-card::before {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--grad-brand);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-mid) var(--ease-out-expo);
  box-shadow: 0 0 12px rgba(168,85,247,.5);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  background: var(--bg-card-h);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 40px rgba(168,85,247,.12);
  transform: translateY(-8px);
}

/* 鼠标光追 */
.feature-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle 200px at var(--mx,50%) var(--my,50%), rgba(168,85,247,.06), transparent);
  opacity: 0; transition: opacity var(--dur-mid) ease;
  pointer-events: none;
}
.feature-card:hover::after { opacity: 1; }

.feature-icon-wrap {
  width: 54px; height: 54px;
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  transition: transform var(--dur-mid) var(--ease-spring);
  position: relative;
}
.feature-card:hover .feature-icon-wrap { transform: scale(1.12) rotate(-4deg); }
.feature-icon-wrap::after {
  content: '';
  position: absolute; inset: -2px;
  border-radius: inherit;
  background: inherit;
  filter: blur(8px); opacity: .5; z-index: -1;
}

.feature-icon-wrap.purple { background:rgba(168,85,247,.15); color:var(--gem-purple); }
.feature-icon-wrap.blue   { background:rgba(56,189,248,.15);  color:var(--gem-blue); }
.feature-icon-wrap.green  { background:rgba(74,222,128,.15);  color:var(--gem-green); }
.feature-icon-wrap.orange { background:rgba(251,146,60,.15);  color:var(--gem-orange); }
.feature-icon-wrap.pink   { background:rgba(244,114,182,.15); color:var(--gem-pink); }
.feature-icon-wrap.teal   { background:rgba(45,212,191,.15);  color:var(--gem-teal); }

.feature-title { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--text-primary); letter-spacing:-.01em; }
.feature-desc  { font-size: 13px; color: var(--text-secondary); line-height: 1.68; margin-bottom: 16px; }
.feature-tags  { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.feature-prog-label {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--text-muted); margin-bottom: 6px;
}

/* 飞轮卡片 */
.flywheel-card {
  background: linear-gradient(145deg,rgba(168,85,247,.08),rgba(56,189,248,.06));
  border-color: rgba(168,85,247,.2);
}
.flywheel-visual {
  display: flex; align-items: center; justify-content: center;
  gap: 18px; margin-top: 14px;
}
.fw-wheel {
  width: 68px; height: 68px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 3px;
  font-size: 10px; font-weight: 700; text-align: center;
  transition: transform var(--dur-mid) ease;
}
.fw-wheel.brand {
  background: rgba(168,85,247,.15);
  border: 1px solid rgba(168,85,247,.3);
  color: var(--gem-purple);
  animation: fwGlow 4s ease infinite;
}
.fw-wheel.sales {
  background: rgba(56,189,248,.15);
  border: 1px solid rgba(56,189,248,.3);
  color: var(--gem-blue);
  animation: fwGlow2 4s ease infinite;
}
@keyframes fwGlow  { 0%,100%{ box-shadow:0 0 0 0 rgba(168,85,247,.3);} 50%{ box-shadow:0 0 20px 6px rgba(168,85,247,.12);} }
@keyframes fwGlow2 { 0%,100%{ box-shadow:0 0 0 0 rgba(56,189,248,.3);}  50%{ box-shadow:0 0 20px 6px rgba(56,189,248,.12);} }
.fw-icon { font-size: 20px; line-height:1; }
.fw-arrow { font-size: 20px; color: var(--text-muted); animation: arrowPulse 2s ease infinite; }
@keyframes arrowPulse {
  0%,100% { transform:scaleX(1); opacity:.4; color:var(--text-muted); }
  50%     { transform:scaleX(1.2); opacity:1; color:var(--gem-purple); }
}

/* ═══════════════════════════════════════════════════════
   DASHBOARD — 数据仪表盘
═══════════════════════════════════════════════════════ */
.dashboard-section { background: var(--bg-dark); padding: var(--section-py) 0; }

.dashboard-shell {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card), 0 0 60px rgba(168,85,247,.06);
  overflow: hidden;
  backdrop-filter: blur(20px);
}
.dash-toolbar {
  background: rgba(255,255,255,.025);
  border-bottom: 1px solid var(--border-glass);
  padding: 12px 20px;
  display: flex; align-items: center; gap: 8px;
}
.dash-dot { width: 12px; height: 12px; border-radius: 50%; }
.dash-dot.red    { background: #ff5f57; box-shadow: 0 0 6px rgba(255,95,87,.5); }
.dash-dot.yellow { background: #febc2e; box-shadow: 0 0 6px rgba(254,188,46,.5); }
.dash-dot.green  { background: #28c840; box-shadow: 0 0 6px rgba(40,200,64,.5); }
.dash-title {
  margin-left: 10px; font-size: 11px; font-weight: 600;
  color: var(--text-muted); letter-spacing: .05em; flex: 1; text-align: center;
  font-family: 'JetBrains Mono', monospace;
}

.dash-body { padding: 24px; }

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 14px; margin-bottom: 20px;
}
@media (max-width: 900px) { .kpi-row { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 500px) { .kpi-row { grid-template-columns: 1fr; } }

.kpi-tile {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-lg); padding: 16px;
  transition: all var(--dur-mid) ease; cursor: pointer;
}
.kpi-tile:hover {
  background: var(--bg-glass-h);
  border-color: var(--border-glow);
  box-shadow: 0 0 20px rgba(168,85,247,.08);
  transform: translateY(-3px);
}
.kpi-tile-label { font-size: 10px; font-weight:600; color:var(--text-muted); letter-spacing:.06em; text-transform:uppercase; margin-bottom:6px; }
.kpi-tile-val {
  font-size: 30px; font-weight: 900;
  letter-spacing: -.035em; line-height: 1; margin-bottom: 4px;
  font-family: 'JetBrains Mono', monospace;
}
.kpi-tile-val.purple { color: var(--gem-purple); text-shadow: 0 0 16px rgba(168,85,247,.4); }
.kpi-tile-val.blue   { color: var(--gem-blue);   text-shadow: 0 0 16px rgba(56,189,248,.4); }
.kpi-tile-val.green  { color: var(--gem-green);  text-shadow: 0 0 16px rgba(74,222,128,.4); }
.kpi-tile-val.orange { color: var(--gem-orange); text-shadow: 0 0 16px rgba(251,146,60,.4); }
.kpi-tile-change { font-size: 11px; font-weight: 600; }
.kpi-tile-change.up   { color: #4ade80; }
.kpi-tile-change.down { color: #f87171; }

.chart-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 14px;
}
@media (max-width: 900px) { .chart-grid { grid-template-columns: 1fr; } }
.chart-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-lg); padding: 18px;
}
.chart-box-title { font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 14px; }

.platform-list { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.platform-item { display: flex; align-items: center; gap: 8px; }
.platform-dot  { width: 8px; height: 8px; border-radius: 50%; flex-shrink:0; }
.platform-name { font-size: 12px; color: var(--text-secondary); flex:1; }
.platform-pct  { font-size: 13px; font-weight: 700; font-family: 'JetBrains Mono', monospace; }

/* ═══════════════════════════════════════════════════════
   TECH — 技术架构
═══════════════════════════════════════════════════════ */
.tech { background: var(--bg-deep); padding: var(--section-py) 0; }

.pipeline-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-bottom: 28px;
  backdrop-filter: blur(20px);
}
.pipeline-steps {
  display: grid;
  grid-template-columns: repeat(5,1fr);
}
@media (max-width: 900px) { .pipeline-steps { grid-template-columns: 1fr; } }

.pipeline-step {
  padding: 26px 18px;
  border-right: 1px solid var(--border-glass);
  position: relative; cursor: pointer;
  transition: all var(--dur-mid) var(--ease-out-expo);
}
.pipeline-step:last-child { border-right: none; }
.pipeline-step::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  transition: opacity var(--dur-mid);
  opacity: 0;
}
.pipeline-step.active::before, .pipeline-step:hover::before { opacity: 1; }
.pipeline-step[data-step="1"]::before { background: linear-gradient(90deg,#a855f7,#8b5cf6); box-shadow: 0 0 8px #a855f7; }
.pipeline-step[data-step="2"]::before { background: linear-gradient(90deg,#818cf8,#a855f7); box-shadow: 0 0 8px #818cf8; }
.pipeline-step[data-step="3"]::before { background: linear-gradient(90deg,#38bdf8,#818cf8); box-shadow: 0 0 8px #38bdf8; }
.pipeline-step[data-step="4"]::before { background: linear-gradient(90deg,#22d3ee,#38bdf8); box-shadow: 0 0 8px #22d3ee; }
.pipeline-step[data-step="5"]::before { background: linear-gradient(90deg,#2dd4bf,#22d3ee); box-shadow: 0 0 8px #2dd4bf; }

.pipeline-step:hover, .pipeline-step.active { background: var(--bg-glass-h); }

.step-num {
  font-size: 10px; font-weight: 700; color: var(--text-muted);
  letter-spacing: .1em; margin-bottom: 12px;
  font-family: 'JetBrains Mono', monospace;
}
.step-icon-box {
  width: 42px; height: 42px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px; font-size: 17px;
  transition: transform var(--dur-mid) var(--ease-spring);
}
.pipeline-step:hover .step-icon-box,
.pipeline-step.active .step-icon-box { transform: scale(1.15); }
.step-icon-box.s1 { background:rgba(168,85,247,.15); color:var(--gem-purple); }
.step-icon-box.s2 { background:rgba(129,140,248,.15); color:var(--gem-indigo); }
.step-icon-box.s3 { background:rgba(56,189,248,.15);  color:var(--gem-blue); }
.step-icon-box.s4 { background:rgba(34,211,238,.15);  color:var(--gem-cyan); }
.step-icon-box.s5 { background:rgba(45,212,191,.15);  color:var(--gem-teal); }

.step-title { font-size: 14px; font-weight: 700; margin-bottom: 6px; color: var(--text-primary); }
.step-desc  { font-size: 11px; color: var(--text-muted); line-height: 1.55; margin-bottom: 8px; }
.step-tech  {
  font-size: 9px; font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted); background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: 3px 8px; border-radius: var(--r-sm); display: inline-block;
}

.tech-pillars {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 16px;
}
@media (max-width: 768px) { .tech-pillars { grid-template-columns: 1fr; } }
.tech-pillar {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl); padding: 28px;
  text-align: center; box-shadow: var(--shadow-card);
  transition: all var(--dur-mid) var(--ease-out-expo);
  backdrop-filter: blur(20px);
}
.tech-pillar:hover {
  background: var(--bg-card-h);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), var(--neon-purple);
  transform: translateY(-6px);
}
.pillar-icon {
  width: 64px; height: 64px;
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px; font-size: 24px;
  transition: transform var(--dur-mid) var(--ease-spring);
  position: relative;
}
.pillar-icon::after {
  content: ''; position: absolute; inset: -2px; border-radius: inherit;
  background: inherit; filter: blur(8px); opacity: .4; z-index: -1;
}
.tech-pillar:hover .pillar-icon { transform: scale(1.1) rotate(-5deg); }
.pillar-title { font-size: 16px; font-weight: 700; margin-bottom: 10px; color: var(--text-primary); }
.pillar-desc  { font-size: 13px; color: var(--text-secondary); line-height: 1.68; }

/* ═══════════════════════════════════════════════════════
   ROADMAP — 开发路线图
═══════════════════════════════════════════════════════ */
.roadmap { background: var(--bg-dark); padding: var(--section-py) 0; }

.roadmap-timeline {
  position: relative;
  padding: 0 0 0 48px;
}
.roadmap-timeline::before {
  content: ''; position: absolute;
  left: 17px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(to bottom,var(--gem-purple),var(--gem-blue),var(--gem-teal),var(--gem-orange));
  border-radius: 1px;
  box-shadow: 0 0 12px rgba(168,85,247,.3);
}

.roadmap-item {
  position: relative; margin-bottom: 32px; padding-left: 24px;
}
.roadmap-item:last-child { margin-bottom: 0; }

.roadmap-dot {
  position: absolute; left: -39px; top: 22px;
  width: 20px; height: 20px; border-radius: 50%;
  border: 3px solid var(--bg-dark); z-index: 2;
  transition: transform var(--dur-mid) var(--ease-spring);
}
.roadmap-dot.p1 { background: var(--gem-purple); box-shadow: 0 0 12px var(--gem-purple); }
.roadmap-dot.p2 { background: var(--gem-blue);   box-shadow: 0 0 12px var(--gem-blue); }
.roadmap-dot.p3 { background: var(--gem-teal);   box-shadow: 0 0 12px var(--gem-teal); }
.roadmap-dot.p4 { background: var(--gem-orange); box-shadow: 0 0 12px var(--gem-orange); }
.roadmap-item:hover .roadmap-dot { transform: scale(1.4); }

.roadmap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl); padding: 24px 26px;
  box-shadow: var(--shadow-card);
  transition: all var(--dur-mid) var(--ease-out-expo);
  backdrop-filter: blur(20px);
}
.roadmap-card:hover {
  background: var(--bg-card-h);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 30px rgba(168,85,247,.1);
  transform: translateX(8px);
}

.roadmap-phase {
  font-size: 10px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: 8px; padding: 3px 10px;
  border-radius: var(--r-full); display: inline-block;
}
.roadmap-phase.p1 { background:rgba(168,85,247,.15); color:var(--gem-purple); border:1px solid rgba(168,85,247,.25); }
.roadmap-phase.p2 { background:rgba(56,189,248,.12);  color:var(--gem-blue);   border:1px solid rgba(56,189,248,.25); }
.roadmap-phase.p3 { background:rgba(45,212,191,.12);  color:var(--gem-teal);   border:1px solid rgba(45,212,191,.25); }
.roadmap-phase.p4 { background:rgba(251,146,60,.12);  color:var(--gem-orange); border:1px solid rgba(251,146,60,.25); }

.roadmap-title { font-size: 19px; font-weight: 800; letter-spacing:-.02em; margin-bottom: 8px; color: var(--text-primary); }
.roadmap-desc  { font-size: 13px; color: var(--text-secondary); line-height:1.68; margin-bottom:14px; }
.roadmap-tags  { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }

.roadmap-progress { display: flex; align-items: center; gap: 12px; }
.roadmap-progress-bar { flex: 1; }
.roadmap-progress-pct {
  font-size: 14px; font-weight: 800;
  letter-spacing: -.02em; font-family: 'JetBrains Mono', monospace;
  flex-shrink: 0; width: 40px; text-align: right;
}
.roadmap-progress-pct.p1 { color: var(--gem-purple); }
.roadmap-progress-pct.p2 { color: var(--gem-blue); }
.roadmap-progress-pct.p3 { color: var(--gem-teal); }
.roadmap-progress-pct.p4 { color: var(--gem-orange); }

/* ═══════════════════════════════════════════════════════
   PRICING — 服务方案
═══════════════════════════════════════════════════════ */
.pricing { background: var(--bg-deep); padding: var(--section-py) 0; }

.pricing-toggle-wrap {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; margin-bottom: 48px;
}
.toggle-label { font-size: 14px; font-weight: 600; color: var(--text-muted); }
.toggle-label.active { color: var(--text-primary); }
.toggle-switch {
  position: relative; width: 52px; height: 28px;
  background: var(--gem-purple-d); border-radius: var(--r-full);
  cursor: pointer; transition: all var(--dur-mid) ease; border: none;
  box-shadow: 0 0 12px rgba(168,85,247,.4);
}
.toggle-knob {
  position: absolute; top: 3px; left: 3px;
  width: 22px; height: 22px;
  background: #fff; border-radius: 50%;
  transition: transform var(--dur-mid) var(--ease-spring);
  box-shadow: 0 2px 6px rgba(0,0,0,.3);
}
.toggle-switch.annual .toggle-knob { transform: translateX(24px); }
.save-badge {
  background: rgba(74,222,128,.15); color: var(--gem-green);
  border: 1px solid rgba(74,222,128,.3);
  font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: var(--r-full);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr); gap: 20px;
}
@media (max-width: 900px) { .pricing-grid { grid-template-columns: 1fr; max-width:440px; margin:0 auto; } }

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--r-xl); padding: 34px 28px;
  box-shadow: var(--shadow-card);
  transition: all var(--dur-mid) var(--ease-out-expo);
  position: relative; display: flex; flex-direction: column;
  backdrop-filter: blur(20px);
}
.pricing-card:hover {
  background: var(--bg-card-h);
  box-shadow: var(--shadow-card), 0 0 40px rgba(168,85,247,.12);
  transform: translateY(-8px);
}
.pricing-card.featured {
  background: linear-gradient(145deg,rgba(168,85,247,.1),rgba(56,189,248,.06));
  border-color: rgba(168,85,247,.3);
  box-shadow: var(--shadow-card), 0 0 60px rgba(168,85,247,.15);
  transform: translateY(-10px);
}
.pricing-card.featured:hover { transform: translateY(-16px); }

.pricing-popular {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--grad-brand); color: #fff;
  padding: 4px 18px; border-radius: var(--r-full);
  font-size: 11px; font-weight: 700; white-space: nowrap;
  box-shadow: 0 4px 20px rgba(168,85,247,.4);
}
.pricing-icon-big { font-size: 38px; margin-bottom: 14px; }
.pricing-tier-label {
  font-size: 10px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 6px;
  font-family: 'JetBrains Mono', monospace;
}
.pricing-plan-name { font-size: 22px; font-weight: 800; letter-spacing:-.02em; margin-bottom: 4px; color: var(--text-primary); }
.pricing-tagline   { font-size: 12px; color: var(--text-secondary); margin-bottom: 18px; }

.pricing-price-wrap { margin-bottom: 22px; }
.pricing-price {
  font-size: 46px; font-weight: 900;
  letter-spacing: -.04em; line-height: 1;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  transition: all var(--dur-mid) ease;
}
.pricing-price .currency { font-size: 22px; vertical-align: super; font-weight: 700; }
.pricing-price.free { font-size: 34px; color: var(--gem-purple); text-shadow: var(--neon-purple); }
.pricing-cadence { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.pricing-features { flex: 1; margin-bottom: 26px; display: flex; flex-direction: column; gap: 9px; }
.pricing-feature-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13px; color: var(--text-secondary);
}
.pricing-feature-item .check-icon {
  width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.check-icon.purple { background:rgba(168,85,247,.15); color:var(--gem-purple); }
.check-icon.blue   { background:rgba(56,189,248,.15);  color:var(--gem-blue); }
.check-icon.teal   { background:rgba(45,212,191,.15);  color:var(--gem-teal); }

/* ═══════════════════════════════════════════════════════
   CTA
═══════════════════════════════════════════════════════ */
.cta-section { background: var(--bg-dark); padding: var(--section-py) 0; }
.cta-card {
  background: linear-gradient(135deg,rgba(124,58,237,.3) 0%,rgba(79,70,229,.25) 50%,rgba(14,165,233,.3) 100%);
  border: 1px solid rgba(168,85,247,.25);
  border-radius: var(--r-xl); padding: 72px 48px;
  text-align: center; position: relative; overflow: hidden;
  backdrop-filter: blur(24px);
  box-shadow: 0 0 80px rgba(168,85,247,.1);
}
.cta-card::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
/* CTA 扫光 */
.cta-card::after {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent 340deg, rgba(168,85,247,.08) 360deg);
  animation: ctaSpin 8s linear infinite;
}
@keyframes ctaSpin { to { transform: rotate(360deg); } }
.cta-card .cta-emoji {
  font-size: 56px; margin-bottom: 20px; display: block;
  animation: emojiFloat 3s ease-in-out infinite;
  position: relative; z-index: 1;
}
@keyframes emojiFloat { 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-10px); filter:drop-shadow(0 10px 20px rgba(168,85,247,.3));} }
.cta-card h2 {
  font-size: clamp(28px,4vw,48px); font-weight: 900;
  color: var(--text-primary); letter-spacing:-.03em;
  margin-bottom: 16px; position: relative; z-index: 1;
}
.cta-card p {
  font-size: 17px; color: var(--text-secondary);
  max-width: 560px; margin: 0 auto 36px; line-height: 1.65;
  position: relative; z-index: 1;
}
.cta-actions { display:flex; justify-content:center; gap:14px; flex-wrap:wrap; position: relative; z-index: 1; }
.btn-cta-primary {
  background: #fff; color: var(--gem-purple-d);
  padding:16px 36px; border-radius:var(--r-full);
  font-size:15px; font-weight:700;
  transition:all var(--dur-mid) var(--ease-out-expo);
  box-shadow: 0 4px 24px rgba(255,255,255,.2);
}
.btn-cta-primary:hover { transform:translateY(-3px); box-shadow: 0 8px 40px rgba(255,255,255,.3); }
.btn-cta-secondary {
  background:rgba(255,255,255,.08); color:var(--text-primary);
  border:1px solid rgba(255,255,255,.2);
  padding:16px 36px; border-radius:var(--r-full);
  font-size:15px; font-weight:600;
  transition:all var(--dur-mid) ease;
  backdrop-filter:blur(8px);
}
.btn-cta-secondary:hover { background:rgba(255,255,255,.15); border-color:rgba(255,255,255,.4); transform:translateY(-2px); }

/* ═══════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════ */
footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-glass);
  color: var(--text-secondary);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .logo-text { color: var(--text-primary); }
.footer-brand p { font-size: 13px; color: var(--text-muted); margin-top: 12px; line-height:1.7; }

.footer-col-title { font-size: 11px; font-weight: 700; letter-spacing:.08em; text-transform:uppercase; color:var(--text-secondary); margin-bottom:16px; }
.footer-col-links { list-style:none; display:flex; flex-direction:column; gap:10px; }
.footer-col-links a { font-size:13px; color:var(--text-muted); transition:color var(--dur-fast) ease; }
.footer-col-links a:hover { color: var(--gem-purple); }

.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 12px; color: var(--text-muted); }
.footer-mono { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════
   特效动画
═══════════════════════════════════════════════════════ */
/* 光追 cursor */
#cursor-glow {
  position: fixed; top: 0; left: 0;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle,rgba(168,85,247,.06) 0%,transparent 70%);
  pointer-events: none; z-index: 0;
  transform: translate(-50%,-50%);
  transition: transform .08s linear;
}

/* 数字墙 */
.number-wall {
  position: absolute; inset: 0;
  overflow: hidden; pointer-events: none; z-index: 0;
  opacity: .12;
}
.number-wall span {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--gem-purple);
  animation: numFall linear infinite;
  user-select: none;
}
@keyframes numFall {
  0%   { transform: translateY(-20px); opacity: 0; }
  5%   { opacity: 1; }
  95%  { opacity: .8; }
  100% { transform: translateY(100vh); opacity: 0; }
}

/* 3D Transform 效果 */
.tilt-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* 扫光覆盖 */
.scan-effect {
  position: relative; overflow: hidden;
}
.scan-effect::after {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg,transparent,rgba(255,255,255,.04),transparent);
  animation: scanMove 4s ease-in-out infinite;
}
@keyframes scanMove {
  0%,100%{ left:-100%; }
  50%    { left:150%; }
}

/* 数据流动画 */
.data-flow {
  position: relative;
}
.data-flow::before {
  content: '';
  position: absolute; bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--grad-brand);
  transition: width 2s var(--ease-out-expo);
  box-shadow: 0 0 8px rgba(168,85,247,.5);
}
.data-flow.active::before { width: 100%; }

/* Glow border on hover */
@keyframes glowPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(168,85,247,.3); }
  50%      { box-shadow: 0 0 20px 4px rgba(168,85,247,.15); }
}

/* 星星粒子 */
.star-field {
  position: absolute; inset: 0;
  pointer-events: none; overflow: hidden;
}
.star {
  position: absolute;
  width: 2px; height: 2px;
  background: #fff; border-radius: 50%;
  animation: starTwinkle ease-in-out infinite;
}
@keyframes starTwinkle {
  0%,100% { opacity: .2; transform: scale(1); }
  50%      { opacity: 1;  transform: scale(1.5); }
}