/* ============================================================
   408 Pilot · 主页
   科技风 · 浅色调 · 与应用页保持一致
   ============================================================ */

/* ---- 颜色变量（与现有 styles.css 对齐，扩展浅色科技色） ---- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #10b981;
  --accent: #f59e0b;
  --pink: #ec4899;
  --cyan: #06b6d4;
  --violet: #8b5cf6;

  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef0f4;
  --bg-card: #ffffff;
  --bg-card-soft: #f7f8fc;

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --border: rgba(15, 23, 42, 0.08);
  --border-light: rgba(15, 23, 42, 0.04);

  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 25px 50px -12px rgba(15, 23, 42, 0.15);

  --grad-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --grad-soft: linear-gradient(135deg, #eef2ff 0%, #faf5ff 50%, #fdf2f8 100%);

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative; /* 让 .bg-binary 的 absolute 定位相对 body，铺满整页 */
}

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

/* ============================================================
   滚动进度条
   ============================================================ */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--grad-primary);
  z-index: 200;
  box-shadow: 0 0 12px rgba(99,102,241,0.6);
  transition: width 80ms linear;
}

/* ============================================================
   自定义光标
   ============================================================ */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 300;
  transform: translate3d(-50%, -50%, 0);
  will-change: transform;
}
.cursor-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(99,102,241,0.6);
  transition: width .2s ease, height .2s ease, background .2s ease;
}
.cursor-ring {
  width: 36px; height: 36px;
  border: 1px solid rgba(99,102,241,0.5);
  border-radius: 50%;
  transition: width .2s ease, height .2s ease, border-color .2s ease, background .2s ease;
}
.cursor-dot.hover { width: 0; height: 0; }
.cursor-ring.hover {
  width: 56px; height: 56px;
  border-color: var(--primary);
  background: rgba(99,102,241,0.08);
}
@media (hover: none) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* ============================================================
   故障文字
   ============================================================ */
.glitch {
  position: relative;
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0; left: 0;
  background: var(--bg-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  width: 100%;
  pointer-events: none;
}
.glitch::before {
  color: #ec4899;
  -webkit-text-fill-color: #ec4899;
  animation: glitchA 3.2s infinite steps(1);
  clip-path: inset(0 0 70% 0);
}
.glitch::after {
  color: #06b6d4;
  -webkit-text-fill-color: #06b6d4;
  animation: glitchB 3.6s infinite steps(1);
  clip-path: inset(70% 0 0 0);
}
@keyframes glitchA {
  0%, 90%, 100% { transform: translate(0, 0); }
  92% { transform: translate(-2px, 1px); }
  94% { transform: translate(2px, -1px); }
  96% { transform: translate(-1px, 0); }
}
@keyframes glitchB {
  0%, 88%, 100% { transform: translate(0, 0); }
  90% { transform: translate(2px, -1px); }
  93% { transform: translate(-2px, 1px); }
  96% { transform: translate(1px, 0); }
}

/* ============================================================
   背景层
   ============================================================ */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(180deg, #f6f7fb 0%, #eef0f6 100%);
}

.bg-gradient {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(60% 50% at 20% 20%, rgba(99, 102, 241, 0.18), transparent 60%),
    radial-gradient(50% 50% at 80% 30%, rgba(236, 72, 153, 0.12), transparent 60%),
    radial-gradient(50% 60% at 50% 80%, rgba(16, 185, 129, 0.12), transparent 60%);
  filter: blur(20px);
  animation: bgFloat 18s ease-in-out infinite alternate;
}

@keyframes bgFloat {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(-2%, -1%, 0) scale(1.05); }
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 40%, transparent 80%);
  opacity: 0.7;
}

.bg-orbs .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
  animation: orbFloat 20s ease-in-out infinite;
}
.orb-1 { width: 380px; height: 380px; background: rgba(99,102,241,0.35); top: -80px; left: -80px; }
.orb-2 { width: 320px; height: 320px; background: rgba(236,72,153,0.28); top: 30%; right: -100px; animation-delay: -6s; }
.orb-3 { width: 360px; height: 360px; background: rgba(16,185,129,0.25); bottom: -120px; left: 30%; animation-delay: -12s; }

@keyframes orbFloat {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-30px) translateX(20px); }
}

/* 静态 0/1 散点背景：铺满整页，自身缓慢上飘（单 canvas，单图层） */
.bg-binary {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  display: block;
  /* 纯 CSS 动画：交给 GPU 合成器线程，不占主线程，避免滚动卡顿 */
  animation: bgDrift 4s linear infinite;
  will-change: transform;
  /* 强制提升为独立合成层 */
  transform: translate3d(0, 0, 0);
}

/* 缓慢上飘：1 个 cell 高度 / 4s（约 14 px/s）*/
@keyframes bgDrift {
  from { transform: translate3d(0, 0,     0); }
  to   { transform: translate3d(0, -56px, 0); }
}

.bg-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.bg-scanline {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(180deg,
    transparent 0%, transparent 49.5%,
    rgba(99,102,241,0.05) 50%,
    transparent 50.5%, transparent 100%);
  background-size: 100% 6px;
  mix-blend-mode: multiply;
  opacity: 0.6;
  animation: scanShift 8s linear infinite;
}
@keyframes scanShift {
  from { background-position: 0 0; }
  to   { background-position: 0 60px; }
}

/* ============================================================
   顶部导航
   ============================================================ */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow .3s ease, background .3s ease;
}
.top-nav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 6px 24px -12px rgba(15, 23, 42, 0.18);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 38px; height: 38px;
  border-radius: 12px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 13px; letter-spacing: 0.5px;
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.35);
}
.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  background: linear-gradient(135deg, #1e293b, #6366f1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-tag {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
  flex: 1;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: all 0.2s ease;
}
.nav-links a:hover {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.nav-actions { display: flex; gap: 8px; }
.nav-burger { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 10px;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-ghost {
  color: var(--text-primary);
  background: transparent;
}
.btn-ghost:hover { background: var(--bg-tertiary); }
.btn-primary {
  color: #fff;
  background: var(--grad-primary);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(99, 102, 241, 0.4); }
.btn-block { width: 100%; padding: 12px 18px; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 60px 28px 40px;
  position: relative;
}
.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1.4px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--secondary);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
  animation: dotPulse 1.6s ease-out infinite;
}
@keyframes dotPulse {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2rem, 4.4vw, 3.6rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.grad-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  display: inline-block;
}
.grad-text::after {
  content: '';
  position: absolute;
  left: 6%; right: 6%;
  bottom: 4px;
  height: 10px;
  background: linear-gradient(90deg, rgba(99,102,241,0.18), rgba(236,72,153,0.18));
  border-radius: 4px;
  z-index: -1;
}

.hero-subtitle {
  max-width: 720px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-cta {
  position: relative;
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: 14px;
  overflow: hidden;
}
.btn-cta-primary {
  color: #fff;
  background: var(--grad-primary);
  box-shadow: 0 10px 28px rgba(99, 102, 241, 0.35);
}
.btn-cta-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(99, 102, 241, 0.45); }
.btn-cta-secondary {
  color: var(--text-primary);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.btn-cta-secondary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--primary-light); color: var(--primary); }

.btn-shine {
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.45), transparent);
  transform: skewX(-20deg);
  animation: btnShine 3.4s ease-in-out infinite;
}
@keyframes btnShine {
  0%   { left: -120%; }
  60%  { left: 120%; }
  100% { left: 120%; }
}

/* 指标 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 880px;
  margin: 0 auto 40px;
}
.metric {
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.3s ease;
}
.metric:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.metric strong {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric span {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* 装饰卡片 */
.hero-decor {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.decor-card {
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 18px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: left;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  will-change: transform;
}

.decor-terminal .terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 12px;
}
.decor-terminal .terminal-bar span.dot-red,
.decor-terminal .terminal-bar span.dot-yellow,
.decor-terminal .terminal-bar span.dot-green {
  width: 10px; height: 10px; border-radius: 50%;
}
.dot-red    { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green  { background: #10b981; }
.terminal-title {
  margin-left: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: 'SF Mono', Consolas, monospace;
}

.terminal-body {
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.84rem;
  color: var(--text-primary);
  line-height: 1.85;
  min-height: 168px;
}
.terminal-body .prompt { color: var(--primary); font-weight: 700; }
.terminal-body .cmd    { color: var(--pink); }
.terminal-body .arg    { color: var(--secondary); }
.terminal-body .out    { color: var(--text-secondary); }
.terminal-body .out.ok { color: var(--secondary); font-weight: 600; }
.caret {
  display: inline-block;
  width: 7px; height: 14px;
  background: var(--primary);
  vertical-align: middle;
  margin-left: 4px;
  animation: caretBlink 1s steps(2) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

/* 雷达 */
.decor-radar .radar-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.radar {
  position: relative;
  width: 100%;
  aspect-ratio: 1.6 / 1;
  border-radius: 12px;
  background:
    radial-gradient(ellipse at center, rgba(99,102,241,0.08), transparent 60%),
    linear-gradient(180deg, #fafbff, #eef0fb);
  overflow: hidden;
  border: 1px solid var(--border-light);
}
.radar-ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1px dashed rgba(99,102,241,0.25);
  transform: translate(-50%, -50%);
}
.radar-ring.r1 { width: 36%; aspect-ratio: 1; }
.radar-ring.r2 { width: 60%; aspect-ratio: 1; }
.radar-ring.r3 { width: 88%; aspect-ratio: 1; }
.radar-sweep {
  position: absolute;
  top: 50%; left: 50%;
  width: 44%; height: 1px;
  background: linear-gradient(90deg, rgba(99,102,241,0.7), transparent);
  transform-origin: 0 50%;
  animation: sweep 4s linear infinite;
}
@keyframes sweep { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.radar-node {
  position: absolute;
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.18);
}
.radar-node.n1 { background: #6366f1; top: 22%; left: 26%; }
.radar-node.n2 { background: #10b981; top: 18%; right: 22%; }
.radar-node.n3 { background: #f59e0b; bottom: 24%; left: 24%; }
.radar-node.n4 { background: #ec4899; bottom: 22%; right: 18%; }
.radar-node.n5.core {
  background: var(--grad-primary);
  width: 44px; height: 44px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1rem;
  animation: corePulse 2.4s ease-in-out infinite;
}
@keyframes corePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99,102,241,0.45), 0 4px 14px rgba(99,102,241,0.4); }
  50%      { box-shadow: 0 0 0 14px rgba(99,102,241,0), 0 4px 14px rgba(99,102,241,0.4); }
}
.radar-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.radar-foot i {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}

/* 终端 LIVE 徽章 */
.terminal-badge {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(16,185,129,0.12);
  color: var(--secondary);
  letter-spacing: 0.5px;
  animation: livePulse 1.6s ease-in-out infinite;
  font-family: 'SF Mono', Consolas, monospace;
}
.terminal-badge.live::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--secondary);
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
  box-shadow: 0 0 6px rgba(16,185,129,0.6);
}
@keyframes livePulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }

/* 倒计时面板 */
.decor-countdown {
  background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
  border: 1px solid rgba(99,102,241,0.18);
  display: flex;
  flex-direction: column;
  padding: 20px;
}
.cd-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.cd-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.5px;
}
.cd-pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16,185,129,0.6);
  animation: livePulse 1.6s infinite;
}
.cd-main {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 4px 0 2px;
}
.cd-number {
  font-size: 3.2rem;
  font-weight: 800;
  font-family: 'SF Mono', Consolas, monospace;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -1px;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cd-unit {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
}
.cd-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'SF Mono', Consolas, monospace;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(99,102,241,0.18);
}
.cd-features {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
}
.cd-features li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(99,102,241,0.04);
  border: 1px solid rgba(99,102,241,0.08);
  transition: all 0.25s ease;
}
.cd-features li:hover {
  background: rgba(99,102,241,0.08);
  transform: translateX(2px);
}
.cd-ico {
  width: 28px; height: 28px;
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(99,102,241,0.18);
}
.cd-features li > div { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.cd-features li b {
  font-size: 0.85rem; font-weight: 700;
  color: var(--text-primary);
}
.cd-features li span {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* 智能题库面板 */
.decor-quiz {
  background: linear-gradient(135deg, #ffffff 0%, #fff5f8 100%);
  border: 1px solid rgba(236,72,153,0.18);
  display: flex; flex-direction: column;
  padding: 20px;
}
.quiz-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.quiz-tag {
  font-size: 0.72rem; font-weight: 700;
  padding: 3px 8px; border-radius: 6px;
  background: linear-gradient(135deg, #ec4899, #f59e0b);
  color: #fff; letter-spacing: 0.5px;
}
.quiz-source {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: 'SF Mono', Consolas, monospace;
}
.quiz-features {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  flex: 1;
}
.quiz-features li {
  display: flex; flex-direction: column; gap: 6px;
  padding: 12px 12px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(236,72,153,0.06), rgba(245,158,11,0.04));
  border: 1px solid rgba(236,72,153,0.10);
  transition: all 0.25s ease;
  min-height: 0;
}
.quiz-features li:hover {
  background: linear-gradient(135deg, rgba(236,72,153,0.12), rgba(245,158,11,0.08));
  transform: translateY(-2px);
  box-shadow: 0 6px 16px -4px rgba(236,72,153,0.25);
}
.quiz-features li > div { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.quiz-num {
  font-size: 0.7rem; font-weight: 800;
  font-family: 'SF Mono', Consolas, monospace;
  font-style: normal;
  color: #ec4899;
  background: rgba(236,72,153,0.12);
  padding: 3px 8px;
  border-radius: 6px;
  align-self: flex-start;
  letter-spacing: 0.5px;
}
.quiz-features li b {
  font-size: 0.86rem; font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.quiz-features li span {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.45;
}
.quiz-cta-btn {
  margin-top: 14px;
  width: 100%;
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #ec4899, #f59e0b);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px -2px rgba(236,72,153,0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.quiz-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px -2px rgba(236,72,153,0.5);
}
.quiz-cta-btn:active { transform: translateY(0); }

/* ============================================================
   数据滚动条 (stock-ticker)
   ============================================================ */
.ticker {
  display: flex;
  align-items: center;
  background: linear-gradient(90deg, rgba(99,102,241,0.08), rgba(236,72,153,0.04), rgba(16,185,129,0.08));
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  overflow: hidden;
  position: relative;
}
.ticker::before, .ticker::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 60px;
  z-index: 2;
  pointer-events: none;
}
.ticker::before { left: 0; background: linear-gradient(90deg, var(--bg-primary), transparent); }
.ticker::after  { right: 0; background: linear-gradient(270deg, var(--bg-primary), transparent); }
.ticker-label {
  flex-shrink: 0;
  padding: 10px 16px;
  background: var(--grad-primary);
  color: #fff;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  z-index: 3;
  position: relative;
}
.ticker-track {
  flex: 1;
  display: flex;
  overflow: hidden;
  white-space: nowrap;
}
.ticker-content {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding-left: 28px;
  animation: tickerScroll 60s linear infinite;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.ticker-content.up   { color: var(--secondary); }
.ticker-content.down { color: var(--danger); }
.ticker-item strong { color: var(--text-primary); font-weight: 700; margin-right: 6px; }
.ticker-item .delta { font-size: 0.78rem; margin-left: 4px; }
.ticker-item .delta.up   { color: var(--secondary); }
.ticker-item .delta.down { color: var(--danger); }
@keyframes tickerScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-100%); }
}

/* ============================================================
   Section 通用
   ============================================================ */
.section {
  padding: 80px 28px;
  position: relative;
}
.section-alt {
  background: linear-gradient(180deg, rgba(255,255,255,0.4), rgba(255,255,255,0.7));
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.section-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.eyebrow {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 12px;
}
.eyebrow-hex {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.18);
  color: var(--primary-dark);
  font-family: 'SF Mono', Consolas, monospace;
}
.section-title {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ============================================================
   功能矩阵
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 26px;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.3s ease;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--card-glow, linear-gradient(135deg, rgba(99,102,241,0.06), transparent 60%));
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover {
  border-color: var(--card-color, var(--primary-light));
  box-shadow: 0 18px 40px -12px var(--card-shadow, rgba(99,102,241,0.25));
}

.feature-card[data-color="indigo"]  { --card-color:#818cf8; --card-shadow:rgba(99,102,241,0.22); --card-glow:linear-gradient(135deg, rgba(99,102,241,0.10), transparent 60%); }
.feature-card[data-color="emerald"] { --card-color:#34d399; --card-shadow:rgba(16,185,129,0.22); --card-glow:linear-gradient(135deg, rgba(16,185,129,0.10), transparent 60%); }
.feature-card[data-color="amber"]   { --card-color:#fbbf24; --card-shadow:rgba(245,158,11,0.22); --card-glow:linear-gradient(135deg, rgba(245,158,11,0.10), transparent 60%); }
.feature-card[data-color="pink"]    { --card-color:#f472b6; --card-shadow:rgba(236,72,153,0.22); --card-glow:linear-gradient(135deg, rgba(236,72,153,0.10), transparent 60%); }
.feature-card[data-color="cyan"]    { --card-color:#22d3ee; --card-shadow:rgba(6,182,212,0.22); --card-glow:linear-gradient(135deg, rgba(6,182,212,0.10), transparent 60%); }
.feature-card[data-color="violet"]  { --card-color:#a78bfa; --card-shadow:rgba(139,92,246,0.22); --card-glow:linear-gradient(135deg, rgba(139,92,246,0.10), transparent 60%); }

.feature-num {
  position: absolute;
  top: 16px; right: 18px;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
  opacity: 0.6;
}

.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.12));
  margin-bottom: 16px;
}
.feature-icon svg { width: 24px; height: 24px; fill: var(--primary); }
.feature-card[data-color="emerald"] .feature-icon { background: linear-gradient(135deg, rgba(16,185,129,0.14), rgba(6,182,212,0.10)); }
.feature-card[data-color="emerald"] .feature-icon svg { fill: var(--secondary); }
.feature-card[data-color="amber"] .feature-icon { background: linear-gradient(135deg, rgba(245,158,11,0.14), rgba(239,68,68,0.10)); }
.feature-card[data-color="amber"] .feature-icon svg { fill: var(--accent); }
.feature-card[data-color="pink"] .feature-icon { background: linear-gradient(135deg, rgba(236,72,153,0.14), rgba(244,114,182,0.10)); }
.feature-card[data-color="pink"] .feature-icon svg { fill: var(--pink); }
.feature-card[data-color="cyan"] .feature-icon { background: linear-gradient(135deg, rgba(6,182,212,0.14), rgba(34,211,238,0.10)); }
.feature-card[data-color="cyan"] .feature-icon svg { fill: var(--cyan); }
.feature-card[data-color="violet"] .feature-icon { background: linear-gradient(135deg, rgba(139,92,246,0.14), rgba(168,85,247,0.10)); }
.feature-card[data-color="violet"] .feature-icon svg { fill: var(--violet); }

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 14px;
}
.feature-tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(99,102,241,0.08);
  color: var(--primary);
}
.feature-card[data-color="emerald"] .feature-tag { background: rgba(16,185,129,0.10); color: var(--secondary); }
.feature-card[data-color="amber"]   .feature-tag { background: rgba(245,158,11,0.10); color: var(--accent); }
.feature-card[data-color="pink"]    .feature-tag { background: rgba(236,72,153,0.10); color: var(--pink); }
.feature-card[data-color="cyan"]    .feature-tag { background: rgba(6,182,212,0.10); color: var(--cyan); }
.feature-card[data-color="violet"]  .feature-tag { background: rgba(139,92,246,0.10); color: var(--violet); }

/* ============================================================
   智能引擎 - 流程图
   ============================================================ */
.arch-flow {
  display: flex;
  align-items: stretch;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.arch-step {
  flex: 1 1 160px;
  min-width: 160px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  position: relative;
  transition: all 0.3s ease;
}
.arch-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.arch-step .arch-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--grad-primary);
  margin-bottom: 10px;
  box-shadow: 0 0 0 4px rgba(99,102,241,0.15);
}
.arch-step h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.arch-step p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.arch-step::before {
  content: attr(data-step);
  position: absolute;
  top: 12px; right: 14px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  font-family: 'SF Mono', Consolas, monospace;
}
.arch-arrow {
  flex: 0 0 24px;
  align-self: center;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  position: relative;
}
.arch-arrow::after {
  content: '';
  position: absolute;
  right: -2px; top: 50%;
  width: 8px; height: 8px;
  border-top: 2px solid var(--primary-light);
  border-right: 2px solid var(--primary-light);
  transform: translateY(-50%) rotate(45deg);
}

.arch-panels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.arch-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.arch-panel:hover { box-shadow: var(--shadow-md); }
.arch-panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
}
.chip-indigo  { background: linear-gradient(135deg, #6366f1, #818cf8); }
.chip-emerald { background: linear-gradient(135deg, #10b981, #34d399); }
.chip-amber   { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.chip-pink    { background: linear-gradient(135deg, #ec4899, #f472b6); }
.chip-soft {
  font-size: 0.74rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 8px;
}
.arch-panel p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ============================================================
   数据底座
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.stat-card:hover { box-shadow: var(--shadow-md); }
.stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}
.stat-label {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 14px;
}
.stat-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
}
.stat-bar span {
  display: block;
  height: 100%;
  background: var(--grad-primary);
  border-radius: 999px;
  transform-origin: left;
  animation: barFill 1.4s ease-out;
}
@keyframes barFill { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ============================================================
   学习路径
   ============================================================ */
.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  position: relative;
}
.road-step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.road-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.road-step-hot {
  border-color: var(--primary-light);
  background: linear-gradient(160deg, #ffffff 60%, rgba(99,102,241,0.05));
}
.road-mark {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
  background: var(--grad-primary);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.road-step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.road-step p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.road-step ul {
  list-style: none;
  padding: 0;
}
.road-step li {
  position: relative;
  padding-left: 18px;
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.road-step li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* ============================================================
   实战演示 showcase
   ============================================================ */
.showcase {
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.showcase-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  position: relative;
  transition: all .2s ease;
}
.showcase-tab i {
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .3s ease;
}
.showcase-tab.active { color: var(--primary); background: rgba(99,102,241,0.04); }
.showcase-tab.active i { transform: scaleX(1); }
.tab-num {
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(99,102,241,0.10);
  padding: 2px 8px;
  border-radius: 6px;
}
.showcase-stage { position: relative; min-height: 360px; }
.showcase-pane {
  display: none;
  grid-template-columns: 1fr 1.1fr;
  gap: 28px;
  padding: 32px;
  align-items: center;
  animation: paneIn 0.4s ease;
}
.showcase-pane.active { display: grid; }
@keyframes paneIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.showcase-left h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.showcase-left p  { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 14px; }
.showcase-list { list-style: none; padding: 0; }
.showcase-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 0.92rem;
  color: var(--text-primary);
}
.showcase-list li span { position: absolute; left: 0; top: 8px; color: var(--primary); font-weight: 700; }
.showcase-right {
  background: linear-gradient(180deg, #ffffff, #f7f8fc);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transform-style: preserve-3d;
}

.show-chat { display: flex; flex-direction: column; gap: 12px; }
.chat-msg {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 88%;
}
.chat-msg.user {
  background: var(--grad-primary);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.chat-msg.ai {
  background: #fff;
  border: 1px solid var(--border);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}
.chat-msg.ai p { margin-bottom: 4px; }
.chat-msg.ai p.ok { color: var(--secondary); font-weight: 600; margin-top: 6px; }

.show-review .review-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.review-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.tag-red    { background: rgba(239,68,68,0.10); color: #ef4444; }
.review-meta { font-size: 0.8rem; color: var(--text-muted); font-family: 'SF Mono', Consolas, monospace; }
.review-title { font-weight: 600; font-size: 0.98rem; margin-bottom: 12px; line-height: 1.5; }
.review-choices { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.rc {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.88rem;
  background: rgba(15,23,42,0.04);
  border: 1px solid transparent;
  color: var(--text-secondary);
}
.rc.right {
  background: rgba(16,185,129,0.08);
  color: var(--secondary);
  border-color: rgba(16,185,129,0.20);
  font-weight: 600;
}
.review-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}
.review-foot b { color: var(--text-primary); }
.review-go { color: var(--primary); font-weight: 600; }

.show-plan { display: flex; flex-direction: column; gap: 10px; }
.plan-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  position: relative;
}
.plan-row .plan-bar { grid-column: 1 / -1; }
.plan-phase {
  font-weight: 700;
  color: var(--text-primary);
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 0.85rem;
}
.plan-range {
  text-align: right;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'SF Mono', Consolas, monospace;
}
.plan-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
}
.plan-bar i {
  display: block;
  height: 100%;
  width: var(--w, 0);
  background: var(--grad-primary);
  border-radius: 999px;
  transform-origin: left;
  animation: barFill 1.6s ease-out;
}
.plan-today {
  margin-top: 8px;
  padding: 10px 12px;
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(236,72,153,0.06));
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--text-primary);
  border-left: 3px solid var(--primary);
}

/* ============================================================
   对比表
   ============================================================ */
.compare {
  margin-top: 8px;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.compare-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 22px;
}
.compare-title span {
  display: inline-block;
  margin: 0 8px;
  padding: 2px 8px;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: 'SF Mono', Consolas, monospace;
  letter-spacing: 1px;
}
.compare-grid { display: flex; flex-direction: column; gap: 4px; }
.compare-row {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr 1.6fr;
  gap: 10px;
  padding: 12px 16px;
  font-size: 0.92rem;
  border-radius: 10px;
  transition: background .2s ease;
}
.compare-row:hover:not(.compare-row-head) { background: rgba(99,102,241,0.04); }
.compare-row-head {
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.82rem;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  padding-bottom: 10px;
}
.compare-row .hl {
  color: var(--primary);
  font-weight: 600;
  position: relative;
  padding-left: 14px;
}
.compare-row .hl::before {
  content: '›';
  position: absolute;
  left: 0; top: 0;
  color: var(--primary);
  font-weight: 800;
}

/* ============================================================
   学员战绩 testimonial
   ============================================================ */
.testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.testimonial {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  position: relative;
}
.testimonial:hover { box-shadow: var(--shadow-md); }
.t-quote {
  position: absolute;
  top: 10px; right: 18px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.18;
  font-family: 'Georgia', serif;
}
.testimonial p { color: var(--text-primary); font-size: 0.95rem; line-height: 1.7; margin-bottom: 16px; }
.t-foot { display: flex; align-items: center; gap: 10px; }
.t-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}
.t-name { font-weight: 700; font-size: 0.92rem; }
.t-meta { font-size: 0.8rem; color: var(--text-muted); font-family: 'SF Mono', Consolas, monospace; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item[open] { border-color: var(--primary-light); box-shadow: var(--shadow-md); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color .2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-icon {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(99,102,241,0.10);
  color: var(--primary);
  font-weight: 700;
  font-size: 1rem;
  transition: transform .3s ease, background .3s ease;
}
.faq-item[open] .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a { padding: 0 20px 18px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* ============================================================
   最终 CTA
   ============================================================ */
.final-cta {
  padding: 80px 28px;
}
.final-cta-inner {
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(236,72,153,0.06), rgba(16,185,129,0.06));
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final-cta-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  pointer-events: none;
}
.final-cta-text { position: relative; }
.final-cta-text h2 {
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  font-weight: 800;
  margin-bottom: 10px;
}
.final-cta-text p {
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 24px;
}
.final-cta-actions {
  position: relative;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border-light);
  background: rgba(255,255,255,0.6);
  padding-top: 48px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 32px;
  padding: 0 28px 32px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand .brand-name { font-size: 1.05rem; }
.footer-brand .brand-tag  { color: var(--text-secondary); }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.footer-cols h5 {
  font-size: 0.86rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.footer-cols a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 3px 0;
  transition: color 0.2s ease;
}
.footer-cols a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  max-width: 1280px;
  margin: 0 auto;
}
.footer-status i {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--secondary);
  margin-right: 6px;
  vertical-align: middle;
  box-shadow: 0 0 0 3px rgba(16,185,129,0.18);
  animation: dotPulse 1.6s ease-out infinite;
}

/* ============================================================
   模态框
   ============================================================ */
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}
.modal-mask.show,
.modal-mask:target { display: flex; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-xl);
  animation: cardIn 0.25s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute;
  top: 10px; right: 10px;
  width: 28px; height: 28px;
  border-radius: 8px;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--text-muted);
  transition: all 0.2s ease;
  z-index: 2;
}
.modal-close:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.modal-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-tertiary);
  padding: 4px;
  border-radius: 10px;
  margin-bottom: 22px;
  padding-right: 40px; /* 给右上角关闭按钮预留避让空间 */
  justify-content: center;
}
.modal-tab {
  flex: 1;
  padding: 8px 0;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.modal-tab.active {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.modal-form {
  display: none;
  flex-direction: column;
  gap: 14px;
}
.modal-form.active { display: flex; }
.modal-form h3 {
  font-size: 1.2rem;
  font-weight: 700;
}
.modal-sub {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: -6px;
  margin-bottom: 4px;
}
.modal-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  font-weight: 600;
}
.modal-form input {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card-soft);
  color: var(--text-primary);
  transition: all 0.2s ease;
  font-family: inherit;
}
.modal-form input:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(99,102,241,0.12);
}
.form-msg {
  font-size: 0.84rem;
  min-height: 18px;
  line-height: 1.4;
}
.form-msg.error  { color: var(--danger); }
.form-msg.success{ color: var(--secondary); }
.modal-foot {
  font-size: 0.86rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 4px;
}
.modal-foot a {
  color: var(--primary);
  font-weight: 600;
}
.modal-foot a:hover { text-decoration: underline; }

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 200;
  padding: 10px 18px;
  background: #1e293b;
  color: #fff;
  font-size: 0.9rem;
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.toast-success { background: var(--secondary); }
.toast.toast-error   { background: var(--danger); }

/* ============================================================
   滚动入场动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   响应式
   ============================================================ */

/* 宽屏：列数适度上提，避免卡片被拉得"又长又矮" */
@media (min-width: 1280px) {
  .feature-grid    { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .stats-grid      { grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .testimonial-grid{ grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .roadmap         { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .arch-panels     { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .hero-decor      { grid-template-columns: 1.1fr 1fr 1fr; gap: 22px; max-width: 1280px; }
  .footer-cols     { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 980px) {
  .nav-links { display: none; }
  .nav-burger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 38px; height: 38px;
    align-items: center; justify-content: center;
    border-radius: 8px;
    background: var(--bg-tertiary);
  }
  .nav-burger span {
    display: block;
    width: 18px; height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
  }
  .nav-mobile-open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255,255,255,0.96);
    padding: 12px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    margin-left: 0;
  }

  .hero-decor { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .arch-panels { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .roadmap { grid-template-columns: 1fr; }
  .arch-flow { flex-direction: column; align-items: stretch; }
  .arch-arrow {
    width: 2px; height: 20px; align-self: center;
    background: linear-gradient(180deg, transparent, var(--primary-light), transparent);
  }
  .arch-arrow::after {
    right: 50%; top: auto; bottom: -2px;
    transform: translateX(50%) rotate(135deg);
  }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, 1fr); }
  .footer-bottom { flex-direction: column; gap: 6px; align-items: flex-start; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .nav-actions .btn-ghost { display: none; }
}

@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .final-cta-inner { padding: 32px 20px; }
  .section { padding: 56px 18px; }
  .hero { padding: 40px 18px 24px; }
  .nav-inner { padding: 12px 18px; gap: 12px; }
  .modal-card { padding: 22px; }
  .brand-tag { display: none; }
}