/* ============================================================
   GeWu Engine — 官网样式 v2 (impeccable 设计系统)
   主题：深色科技 · 克制渐变 · 排版驱动
   ============================================================ */

:root {
  /* ---- 色板 v3 (商务高端：深黑 + 冷白高光 + 品牌收敛) ---- */
  --bg-0:  oklch(13.5% 0.008 260);   /* 商务深黑（近纯黑带蓝相） */
  --bg-1:  oklch(16.5% 0.01 260);
  --bg-2:  oklch(20% 0.012 260);
  --surface-1: oklch(18% 0.012 260 / 0.7);
  --surface-2: oklch(23% 0.015 260);
  --surface-3: oklch(27% 0.018 260);
  --border: oklch(42% 0.02 260 / 0.28);
  --border-strong: oklch(60% 0.03 260 / 0.35);
  --hairline: oklch(80% 0.02 260 / 0.14);   /* 卡片顶部高光线 */
  --text-1: oklch(97% 0.004 260);
  --text-2: oklch(80% 0.01 260);
  --text-3: oklch(64% 0.015 260);
  --text-mute: oklch(52% 0.02 260);

  /* 品牌（紫蓝 → 收敛为点缀，商业蓝为主） */
  --brand-1: oklch(58% 0.14 265);
  --brand-2: oklch(66% 0.17 300);
  --accent-1: oklch(72% 0.12 265);   /* 商业蓝 */
  --accent-2: oklch(85% 0.06 80);    /* 香槟金（高端点缀） */
  --grad: linear-gradient(120deg, oklch(58% 0.14 265), oklch(66% 0.17 300));
  --grad-soft: linear-gradient(120deg, oklch(58% 0.14 265 / 0.14), oklch(66% 0.17 300 / 0.14));

  /* 产品色（商务化：降饱和、更沉稳） */
  --c-pdf:   oklch(80% 0.11 80);     /* 香槟金 */
  --c-geo:   oklch(74% 0.12 155);    /* 商务绿 */
  --c-flow:  oklch(75% 0.11 220);    /* 商务蓝 */

  /* ---- 字体 ---- */
  --font-display: 'Space Grotesk', 'PingFang SC', 'Microsoft Yahei', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft Yahei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* ---- 间距 (4pt 基准) ---- */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;  --sp-4: 16px;
  --sp-6: 24px; --sp-8: 32px; --sp-12: 48px; --sp-16: 64px; --sp-24: 96px;

  /* ---- 圆角（高端化：更锐） ---- */
  --r-sm: 6px; --r-md: 10px; --r-lg: 14px; --r-xl: 20px;

  /* ---- 动效 (指数缓动) ---- */
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 160ms;
  --dur-med: 260ms;
  --dur-slow: 500ms;
}

* { box-sizing: border-box; }
html, body { padding: 0; margin: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--text-1);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  font-kerning: normal;
  font-variant-ligatures: common-ligatures;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
::selection { background: oklch(65% 0.22 305 / 0.35); color: var(--text-1); }

.container { width: min(1160px, 92vw); margin: 0 auto; }

/* 焦点环：键盘可用性 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-2);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===================== 背景 ===================== */
#bg-canvas {
  position: fixed; inset: 0; z-index: -2;
  width: 100vw; height: 100vh; pointer-events: none;
  opacity: .4;
}
.aurora {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 600px at 8% 6%, oklch(62% 0.19 265 / 0.16), transparent 60%),
    radial-gradient(800px 500px at 94% 0%, oklch(65% 0.22 305 / 0.14), transparent 60%),
    radial-gradient(700px 500px at 50% 100%, oklch(62% 0.12 250 / 0.10), transparent 60%);
  filter: blur(12px);
}

/* ===================== Header ===================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: oklch(16% 0.012 265 / 0.6);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-med), background var(--dur-med);
}
.site-header.scrolled { border-bottom-color: var(--border); background: oklch(16% 0.012 265 / 0.85); }
.header-inner { display: flex; align-items: center; gap: var(--sp-6); padding: var(--sp-4) 0; }
.brand { display: inline-flex; align-items: center; gap: var(--sp-3); }
.brand-mark { width: 34px; height: 34px; border-radius: 9px; overflow: hidden; }
.brand-mark.small { width: 22px; height: 22px; border-radius: 6px; }
.brand-text { font-family: var(--font-display); font-weight: 700; font-size: 15px; letter-spacing: .01em; }
.site-nav { display: flex; gap: var(--sp-8); margin-left: auto; }
.site-nav a {
  color: var(--text-2); font-size: 14px; font-weight: 500;
  transition: color var(--dur-fast) var(--ease-out-quart);
  position: relative;
}
.site-nav a:hover { color: var(--text-1); }
.site-nav a.active { color: var(--text-1); }
.site-nav a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 2px; border-radius: 2px; background: var(--grad);
}

.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 14px;
  border-radius: 999px; padding: 10px 20px;
  transition: transform var(--dur-fast) var(--ease-out-quart),
              box-shadow var(--dur-med) var(--ease-out-quart),
              background var(--dur-med) var(--ease-out-quart),
              border-color var(--dur-med);
  border: 1px solid transparent; white-space: nowrap;
  min-height: 44px;
}
.btn-sm { padding: 6px 16px; font-size: 13px; min-height: 38px; }
.btn-primary { background: var(--grad); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px oklch(62% 0.19 265 / 0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: oklch(55% 0.03 265 / 0.1); color: var(--text-1); border-color: var(--border); }
.btn-ghost:hover { background: oklch(55% 0.03 265 / 0.18); border-color: var(--border-strong); }
.btn-primary i, .btn-ghost i { width: 16px; height: 16px; }

/* ===================== Hero ===================== */
.hero { padding: var(--sp-24) 0 var(--sp-16); }
.hero-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: var(--sp-16); align-items: center; }
.hero-brandline {
  display: inline-flex; align-items: center; gap: 10px;
  background: oklch(55% 0.03 265 / 0.12);
  border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 14px;
  font-size: 13px; color: var(--text-2); margin-bottom: var(--sp-6);
  font-family: var(--font-mono);
}
.hero-brandline .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: oklch(70% 0.16 155);
  box-shadow: 0 0 0 4px oklch(70% 0.16 155 / 0.15);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px oklch(70% 0.16 155 / 0.15); }
  50% { box-shadow: 0 0 0 8px oklch(70% 0.16 155 / 0.05); }
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.2vw, 64px);
  font-weight: 700; line-height: 1.06; letter-spacing: -0.03em;
  margin: 0 0 var(--sp-6);
  text-wrap: balance;
}
.hero-title .grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: 17px; color: var(--text-2);
  max-width: 34em; margin: 0 0 var(--sp-8); line-height: 1.7;
}
.hero-cta { display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* ---- 生态图 ---- */
.hero-right { display: flex; flex-direction: column; align-items: center; justify-content: center; }
.eco-node {
  display: flex; align-items: center; gap: var(--sp-4);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-6);
  min-width: 250px;
  transition: transform var(--dur-med) var(--ease-out-quart),
              border-color var(--dur-med), background var(--dur-med);
}
.eco-node:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--surface-2); }
.eco-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: color-mix(in oklch, var(--accent, oklch(65% 0.22 305)) 14%, transparent);
  color: var(--accent, oklch(65% 0.22 305));
  border: 1px solid color-mix(in oklch, var(--accent, oklch(65% 0.22 305)) 30%, transparent);
}
.eco-icon i { width: 18px; height: 18px; }
.eco-node[data-accent="#fbbf24"] { --accent: var(--c-pdf); }
.eco-node[data-accent="#22d3ee"] { --accent: var(--c-flow); }
.eco-node[data-accent="#34d399"] { --accent: var(--c-geo); }
.eco-name { font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.eco-tag { font-size: 12px; color: var(--text-3); font-family: var(--font-mono); letter-spacing: .03em; }
.eco-edge { color: var(--text-mute); opacity: .8; line-height: 0; }
.eco-edge svg { width: 18px; height: 32px; margin: 2px 0; }

/* ===================== Section ===================== */
.section { padding: var(--sp-24) 0; position: relative; }
.section-head { text-align: center; max-width: 42em; margin: 0 auto var(--sp-12); }
.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600; letter-spacing: .18em;
  color: var(--brand-2); margin-bottom: var(--sp-3);
  text-transform: uppercase;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.8vw, 44px);
  font-weight: 700; line-height: 1.12; letter-spacing: -0.02em;
  margin: 0 0 var(--sp-4);
  text-wrap: balance;
}
.section-sub { color: var(--text-2); font-size: 15px; line-height: 1.7; margin: 0; }

/* 入场动画（transform+opacity only） */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms var(--ease-out-expo), transform 600ms var(--ease-out-expo);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ===================== 产品三卡 ===================== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.product-card {
  display: flex; flex-direction: column;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-8) var(--sp-6) var(--sp-6);
  transition: transform var(--dur-med) var(--ease-out-quart),
              border-color var(--dur-med), background var(--dur-med);
}
.product-card:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2); }
.product-card[data-accent="#fbbf24"] { --accent: var(--c-pdf); }
.product-card[data-accent="#34d399"] { --accent: var(--c-geo); }
.product-card[data-accent="#22d3ee"] { --accent: var(--c-flow); }
.card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  background: color-mix(in oklch, var(--accent) 13%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in oklch, var(--accent) 28%, transparent);
  margin-bottom: var(--sp-6);
}
.card-icon i { width: 21px; height: 21px; }
.card-role {
  font-family: var(--font-mono);
  font-size: 11.5px; color: var(--text-3);
  font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: var(--sp-2);
}
.card-title { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin: 0 0 var(--sp-3); letter-spacing: -0.01em; }
.card-desc { font-size: 14.5px; line-height: 1.65; color: var(--text-2); margin: 0 0 var(--sp-4); flex: 1; }
.card-values { list-style: none; padding: 0; margin: 0 0 var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-2); }
.card-values li { display: flex; align-items: flex-start; gap: 8px; font-size: 13px; color: var(--text-2); line-height: 1.5; }
.card-values i { width: 15px; height: 15px; color: var(--accent, var(--brand-2)); flex-shrink: 0; margin-top: 2px; }
.card-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 14px; color: var(--text-1);
  transition: color var(--dur-fast);
}
.card-link i { width: 15px; height: 15px; transition: transform var(--dur-fast) var(--ease-out-quart); }
.product-card:hover .card-link i { transform: translateX(4px); color: var(--accent); }

/* ===================== 流程图 ===================== */
.section-flow {
  background: oklch(18% 0.012 265);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.flow-diagram { display: flex; flex-direction: column; align-items: center; }
.flow-step { display: flex; align-items: center; gap: var(--sp-3); }
.flow-num { font-family: var(--font-mono); font-size: 12px; color: var(--text-mute); width: 30px; text-align: right; }
.flow-card {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-3) var(--sp-6);
  font-weight: 600; font-size: 15px;
  min-width: 300px; justify-content: center;
  transition: transform var(--dur-med) var(--ease-out-quart), border-color var(--dur-med);
}
.flow-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.flow-card[data-a="#fbbf24"] { --accent: var(--c-pdf); }
.flow-card[data-a="#34d399"] { --accent: var(--c-geo); }
.flow-card[data-a="#22d3ee"] { --accent: var(--c-flow); }
.flow-card i { width: 16px; height: 16px; color: var(--accent, var(--brand-2)); }
.flow-arrow { color: var(--text-mute); line-height: 0; padding: var(--sp-1) 0; }
.flow-arrow i { width: 15px; height: 15px; }

/* ===================== Solutions ===================== */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.solution-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: transform var(--dur-med) var(--ease-out-quart), border-color var(--dur-med);
}
.solution-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.solution-card i { width: 22px; height: 22px; color: var(--brand-2); margin-bottom: var(--sp-3); }
.solution-card h3 { font-family: var(--font-display); font-size: 17px; margin: 0 0 var(--sp-2); font-weight: 700; }
.solution-card p { font-size: 13px; color: var(--text-3); margin: 0; line-height: 1.55; }

/* ===================== Why ===================== */
.section-why { background: radial-gradient(600px 400px at 50% 100%, oklch(65% 0.22 305 / 0.06), transparent 70%); }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.why-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: transform var(--dur-med) var(--ease-out-quart), border-color var(--dur-med);
}
.why-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.why-icon {
  width: 40px; height: 40px; border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid oklch(65% 0.22 305 / 0.2);
  color: var(--brand-2);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-4);
}
.why-icon i { width: 19px; height: 19px; }
.why-card h3 { font-family: var(--font-display); font-size: 16px; margin: 0 0 var(--sp-2); font-weight: 700; }
.why-card p { font-size: 13.5px; color: var(--text-2); margin: 0; line-height: 1.65; }

/* ===================== Stats ===================== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.stat-card {
  text-align: center;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-8) var(--sp-4);
  transition: border-color var(--dur-med), transform var(--dur-med) var(--ease-out-quart);
}
.stat-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(30px, 3vw, 38px); font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: var(--sp-2);
  font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 13px; color: var(--text-3); }

/* ===================== Start ===================== */
.section-start { background: radial-gradient(600px 400px at 50% 0%, oklch(62% 0.19 265 / 0.06), transparent 70%); }
.start-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.start-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-8) var(--sp-6);
  text-align: center;
  transition: transform var(--dur-med) var(--ease-out-quart), border-color var(--dur-med);
}
.start-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.start-q { font-size: 15px; color: var(--text-2); margin: 0 0 var(--sp-3); }
.start-a { font-family: var(--font-display); font-size: 19px; font-weight: 700; color: var(--accent, var(--brand-2)); transition: opacity var(--dur-fast); }
.start-a:hover { opacity: .8; }
.start-card[data-a="#fbbf24"] { --accent: var(--c-pdf); }
.start-card[data-a="#34d399"] { --accent: var(--c-geo); }
.start-card[data-a="#22d3ee"] { --accent: var(--c-flow); }

/* ===================== CTA / Contact 表单 ===================== */
.section-cta { background: radial-gradient(800px 400px at 50% 50%, oklch(65% 0.22 305 / 0.1), transparent 70%); }
.cta-inner {
  display: grid; grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-8); align-items: center;
  padding: var(--sp-12);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
}
.cta-title { font-family: var(--font-display); font-size: clamp(22px, 2.6vw, 30px); margin: var(--sp-2) 0 0; font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }
.cta-form { display: flex; flex-direction: column; gap: var(--sp-3); }
.form-row { display: flex; gap: var(--sp-3); }
.cta-form input, .cta-form textarea {
  width: 100%;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.cta-form input::placeholder, .cta-form textarea::placeholder { color: var(--text-mute); }
.cta-form input:focus, .cta-form textarea:focus {
  outline: none;
  border-color: var(--brand-2);
  box-shadow: 0 0 0 3px oklch(65% 0.22 305 / 0.18);
}
.cta-form textarea { min-height: 90px; resize: vertical; }
.form-status { font-size: 13px; min-height: 20px; }
.form-status.ok { color: oklch(70% 0.16 155); }
.form-status.err { color: oklch(65% 0.2 25); }
.cta-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-2); }

/* ===================== Vision 页 ===================== */
.hero-mini { padding: var(--sp-16) 0 var(--sp-12); text-align: center; }
.hero-mini .hero-title { font-size: clamp(34px, 4.6vw, 52px); }
.hero-mini .hero-sub { margin: 0 auto; }
.vision-list { max-width: 46em; margin: 0 auto; }
.vision-block {
  display: grid; grid-template-columns: 72px 1fr;
  gap: var(--sp-6);
  padding: var(--sp-12) 0;
  border-top: 1px solid var(--border);
}
.vision-block:first-of-type { border-top: none; padding-top: 0; }
.vision-num {
  font-family: var(--font-mono);
  font-size: 16px; font-weight: 600;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.vision-body h2 { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin: 0 0 var(--sp-4); letter-spacing: -0.01em; line-height: 1.25; }
.vision-body p { font-size: 15px; color: var(--text-2); margin: 0 0 var(--sp-4); line-height: 1.8; max-width: 60ch; }
.vision-body strong { color: var(--text-1); font-weight: 600; }
.vision-body em { color: var(--text-1); font-style: italic; }

/* ===================== Footer ===================== */
.site-footer { border-top: 1px solid var(--border); padding: var(--sp-12) 0 var(--sp-8); margin-top: var(--sp-16); background: oklch(15% 0.012 265); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--sp-8); }
.foot-brand { display: inline-flex; align-items: center; gap: var(--sp-3); }
.foot-brand-name { font-family: var(--font-display); font-weight: 700; font-size: 14px; }
.foot-col h4 {
  font-family: var(--font-mono);
  font-size: 11.5px; font-weight: 600; letter-spacing: .15em;
  text-transform: uppercase; color: var(--text-3); margin: 0 0 var(--sp-4);
}
.foot-col { display: flex; flex-direction: column; gap: var(--sp-2); }
.foot-col a { font-size: 14px; color: var(--text-2); transition: color var(--dur-fast); padding: 2px 0; }
.foot-col a:hover { color: var(--text-1); }
.foot-bottom {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); flex-wrap: wrap;
  margin-top: var(--sp-12); padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
  color: var(--text-3); font-size: 12.5px;
}
.foot-tagline { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-mute); }

/* ===================== 响应式 ===================== */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-12); }
  .hero-right { order: -1; }
  .site-nav { display: none; }
  .product-grid, .solutions-grid, .why-grid, .start-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-inner { grid-template-columns: 1fr; padding: var(--sp-8); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .section { padding: var(--sp-16) 0; }
  .vision-block { grid-template-columns: 1fr; gap: var(--sp-2); }
  .footer-grid { grid-template-columns: 1fr; }
  .flow-card { min-width: 0; width: 100%; }
  .flow-step { width: 100%; }
  .form-row { flex-direction: column; }
}

/* ===================== 减少动效 ===================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   v3 — 交互升级层（impeccable: animate + delight）
   ============================================================ */

/* ---- 顶部滚动进度条（Apple 风格细线） ---- */
.scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 2px; width: 0%;
  background: var(--grad);
  z-index: 100;
  transform-origin: left;
}

/* ---- Hero 入场编排 ---- */
.hero-left { opacity: 0; transform: translateY(24px); animation: heroIn 800ms var(--ease-out-expo) forwards; }
.hero-right { opacity: 0; animation: heroIn 800ms var(--ease-out-expo) 120ms forwards; }
@keyframes heroIn {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
/* 生态图节点错峰 */
.hero-right .eco-node { opacity: 0; animation: nodeIn 600ms var(--ease-out-expo) forwards; }
.hero-right .eco-node:nth-child(1) { animation-delay: 250ms; }
.hero-right .eco-node:nth-child(3) { animation-delay: 420ms; }
.hero-right .eco-node:nth-child(5) { animation-delay: 590ms; }
.hero-right .eco-edge { opacity: 0; animation: edgeIn 400ms var(--ease-out-quart) forwards; }
.hero-right .eco-edge:nth-of-type(2) { animation-delay: 330ms; }
.hero-right .eco-edge:nth-of-type(4) { animation-delay: 500ms; }
@keyframes nodeIn {
  from { opacity: 0; transform: translateY(16px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes edgeIn {
  from { opacity: 0; transform: scaleY(0); }
  to { opacity: .8; transform: scaleY(1); }
}

/* ---- 卡片光晕跟随（鼠标位置） ---- */
.product-card { position: relative; overflow: hidden; }
.product-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 50%),
              color-mix(in oklch, var(--accent) 10%, transparent), transparent 60%);
  opacity: 0; transition: opacity var(--dur-med) var(--ease-out-quart);
  pointer-events: none;
}
.product-card:hover::after { opacity: 1; }

/* ---- 图标微动 ---- */
.card-icon i { transition: transform var(--dur-med) var(--ease-out-quart); }
.product-card:hover .card-icon i { transform: scale(1.12) rotate(-3deg); }
.eco-icon i { transition: transform var(--dur-med) var(--ease-out-quart); }
.eco-node:hover .eco-icon i { transform: scale(1.1); }
.why-icon i { transition: transform var(--dur-med) var(--ease-out-quart); }
.why-card:hover .why-icon i { transform: translateY(-2px); }

/* ---- 按钮按压反馈 ---- */
.btn-primary:active, .btn-ghost:active {
  transform: translateY(1px) scale(.98);
  transition-duration: 60ms;
}

/* ---- 生态图节点 hover 强化 ---- */
.eco-node { will-change: transform; }

/* ---- 表单聚焦微交互 ---- */
.cta-form input, .cta-form textarea {
  transition: border-color var(--dur-fast) var(--ease-out-quart),
              box-shadow var(--dur-fast) var(--ease-out-quart),
              transform var(--dur-fast) var(--ease-out-quart);
}
.cta-form input:focus, .cta-form textarea:focus {
  transform: translateY(-1px);
}
.form-status { transition: opacity var(--dur-med); }
.form-status.ok::before { content: '✓ '; }
.form-status.err::before { content: '✕ '; }

/* ---- 提交按钮 loading ---- */
.btn-primary.is-loading {
  pointer-events: none;
  opacity: .75;
  position: relative;
  color: transparent;
}
.btn-primary.is-loading::after {
  content: '';
  position: absolute; inset: 0; margin: auto;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- 成功脉冲 ---- */
.form-status.ok {
  animation: successPulse 500ms var(--ease-out-quart);
}
@keyframes successPulse {
  0% { opacity: 0; transform: translateY(4px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ---- 产品卡 hover 提升 ---- */
.product-card { will-change: transform; }
.product-card .card-link i { transition: transform var(--dur-fast) var(--ease-out-expo); }

/* ---- 导航链接下划线动效 ---- */
.site-nav a::before {
  content: '';
  position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 2px; border-radius: 2px;
  background: var(--grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-med) var(--ease-out-expo);
}
.site-nav a:hover::before { transform: scaleX(1); }
.site-nav a.active::before { transform: scaleX(1); }

/* ---- reduce motion 守护 ---- */
@media (prefers-reduced-motion: reduce) {
  .hero-left, .hero-right, .hero-right .eco-node, .hero-right .eco-edge { animation: none; opacity: 1; transform: none; }
  .btn-primary.is-loading::after { animation: none; }
}

/* ---- vision hero 入场 ---- */
.hero-mini > .container { opacity: 0; animation: heroIn 800ms var(--ease-out-expo) forwards; }
.hero-mini .kicker { opacity: 0; animation: heroIn 700ms var(--ease-out-expo) 100ms forwards; }
.hero-mini .hero-title { opacity: 0; animation: heroIn 700ms var(--ease-out-expo) 200ms forwards; }
.hero-mini .hero-sub { opacity: 0; animation: heroIn 700ms var(--ease-out-expo) 300ms forwards; }
@media (prefers-reduced-motion: reduce) {
  .hero-mini > .container, .hero-mini .kicker, .hero-mini .hero-title, .hero-mini .hero-sub { animation: none; opacity: 1; }
}

/* ============================================================
   v4 — 商务化/高端化/科技化层
   ============================================================ */

/* ---- 卡片顶部高光线（premium 细节） ---- */
.product-card, .why-card, .stat-card, .solution-card, .start-card, .eco-node, .stack-card {
  position: relative;
}
.product-card::before, .why-card::before, .stat-card::before,
.solution-card::before, .start-card::before, .eco-node::before, .stack-card::before {
  content: '';
  position: absolute; top: 0; left: 12%; right: 12%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hairline), transparent);
  pointer-events: none;
}

/* ---- 企业信任条 ---- */
.trust-band {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: var(--sp-3) var(--sp-8);
  padding: var(--sp-4) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: var(--sp-8);
}
.trust-item {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: .08em;
  color: var(--text-3);
  text-transform: uppercase;
}
.trust-item i { width: 14px; height: 14px; color: var(--accent-2); }

/* ---- Enterprise 区 ---- */
.enterprise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.enterprise-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: transform var(--dur-med) var(--ease-out-quart), border-color var(--dur-med);
}
.enterprise-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.enterprise-icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--grad-soft);
  color: var(--accent-1);
  border: 1px solid color-mix(in oklch, var(--accent-1) 25%, transparent);
  margin-bottom: var(--sp-4);
}
.enterprise-icon i { width: 18px; height: 18px; }
.enterprise-card h3 { font-family: var(--font-display); font-size: 15px; margin: 0 0 var(--sp-2); font-weight: 700; }
.enterprise-card p { font-size: 13px; color: var(--text-2); margin: 0; line-height: 1.6; }

/* ---- 产品指标（科技感） ---- */
.card-metrics {
  display: flex; gap: var(--sp-6);
  padding-top: var(--sp-4);
  margin-top: var(--sp-4);
  border-top: 1px solid var(--border);
}
.card-metric { display: flex; flex-direction: column; gap: 2px; }
.card-metric .m-num {
  font-family: var(--font-display);
  font-size: 18px; font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-1);
}
.card-metric .m-label { font-size: 11px; color: var(--text-3); letter-spacing: .05em; text-transform: uppercase; font-family: var(--font-mono); }

/* ---- 终端/控制台 hero 面板 ---- */
.console-panel {
  width: 100%;
  background: oklch(12% 0.01 260 / 0.9);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px oklch(0% 0 0 / 0.45);
}
.console-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: oklch(16% 0.012 260);
  border-bottom: 1px solid var(--border);
}
.console-dot { width: 10px; height: 10px; border-radius: 50%; }
.console-dot.r { background: oklch(65% 0.18 25); }
.console-dot.y { background: oklch(80% 0.14 85); }
.console-dot.g { background: oklch(72% 0.15 155); }
.console-title { margin-left: 8px; font-family: var(--font-mono); font-size: 12px; color: var(--text-3); }
.console-body { padding: var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-3); font-family: var(--font-mono); font-size: 12.5px; }
.console-line { display: flex; gap: 10px; align-items: baseline; }
.console-line .prompt { color: var(--accent-1); flex-shrink: 0; }
.console-line .out { color: var(--text-2); }
.console-line .out em { color: var(--text-1); font-style: normal; font-weight: 600; }
.console-line .ok { color: oklch(72% 0.13 155); }
.console-cursor { display: inline-block; width: 7px; height: 14px; background: var(--accent-1); animation: blink 1.1s step-end infinite; vertical-align: middle; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* ---- 分区标题带细线（高端） ---- */
.section-head .rule {
  width: 40px; height: 2px;
  background: var(--grad);
  border-radius: 2px;
  margin: 0 auto var(--sp-4);
}
.section-head .rule.left { margin-left: 0; }

/* ---- 价格/计划条（商务） ---- */
.plan-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4);
  margin-top: var(--sp-8);
}
.plan-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  display: flex; flex-direction: column; gap: var(--sp-2);
}
.plan-card .plan-name { font-family: var(--font-mono); font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: .1em; }
.plan-card .plan-price { font-family: var(--font-display); font-size: 28px; font-weight: 700; }
.plan-card .plan-price span { font-size: 14px; color: var(--text-3); font-weight: 400; }
.plan-card .plan-desc { font-size: 13px; color: var(--text-2); line-height: 1.6; }

/* ---- 客户 logo 占位 ---- */
.logo-strip {
  display: flex; justify-content: center; flex-wrap: wrap; gap: var(--sp-8);
  opacity: .55;
  margin-top: var(--sp-6);
}
.logo-ph { font-family: var(--font-display); font-size: 16px; font-weight: 600; color: var(--text-2); letter-spacing: .04em; }

@media (max-width: 960px) {
  .enterprise-grid { grid-template-columns: 1fr 1fr; }
  .plan-strip { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .enterprise-grid { grid-template-columns: 1fr; }
  .card-metrics { flex-wrap: wrap; }
}