/* ============================================
   速大优选 · 二手苹果全系列 · 青蓝紫科技风设计系统
   Cyan / Blue / Purple · 深空底色 + 霓虹光晕
   ============================================ */

/* ===== 设计令牌 ===== */
:root {
  /* 色彩系统 — 深色基底 */
  --bg: #08090d;
  --bg-2: #0b0d13;
  --surface: #12151d;
  --surface-2: #171b25;
  --surface-glass: rgba(255,255,255,0.035);
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);

  --text: #f4f6fb;
  --text-2: #aab2c2;
  --text-3: #6e7689;
  --placeholder: #5b6273;

  /* 品牌色 — 青 / 蓝 / 紫 科技三色 */
  --accent: #22d3ee;
  --accent-2: #38bdf8;
  --accent-strong: #6366f1;
  --accent-cool: #38bdf8;
  --accent-cool-2: #a855f7;
  --grad-accent: linear-gradient(135deg, #22d3ee 0%, #6366f1 100%);
  --grad-tech: linear-gradient(135deg, #22d3ee 0%, #a855f7 100%);
  --glow-accent: rgba(34,211,238,0.34);
  --glow-cool: rgba(99,102,241,0.22);

  --status-green: #34d399;
  --light-green: rgba(52,211,153,0.12);
  --light-blue: rgba(88,200,255,0.10);
  --light-gray: rgba(255,255,255,0.05);

  /* 字体 */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', 'IBM Plex Mono', monospace;

  /* 阴影 */
  --shadow: 0 12px 34px rgba(0,0,0,0.45);
  --shadow-hover: 0 22px 60px rgba(0,0,0,0.6);

  /* 过渡 */
  --transition-fast: 160ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 520ms ease-out;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 88px;

  /* 圆角 */
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 22px;
  --radius-circle: 50%;

  /* 布局 */
  --max-width: 1200px;
  --nav-height: 68px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px circle at 10% -10%, rgba(34,211,238,0.13), transparent 52%),
    radial-gradient(820px circle at 92% 0%, rgba(168,85,247,0.12), transparent 50%),
    radial-gradient(700px circle at 50% 112%, rgba(99,102,241,0.10), transparent 55%),
    linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px);
  background-size: auto, auto, 46px 46px, 46px 46px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img { max-width: 100%; display: block; }

/* ===== 验机报告 · 页中页弹窗 ===== */
.inspect-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(4, 6, 10, 0.74);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}
.inspect-overlay.show { opacity: 1; visibility: visible; }
.inspect-modal {
  width: min(1180px, 96vw);
  height: min(820px, 90vh);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(14px) scale(0.98);
  transition: transform var(--transition-normal);
}
.inspect-overlay.show .inspect-modal { transform: none; }
.inspect-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.inspect-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}
.inspect-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grad-accent);
  box-shadow: 0 0 10px var(--glow-accent);
}
.inspect-actions { display: flex; align-items: center; gap: 10px; }
.inspect-open-new {
  font-size: 13px;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 8px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.inspect-open-new:hover { background: rgba(34, 211, 238, 0.1); border-color: var(--accent); }
.inspect-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  line-height: 1;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.inspect-close:hover { color: var(--text); border-color: var(--accent); background: rgba(34, 211, 238, 0.1); }
.inspect-frame { flex: 1; width: 100%; border: 0; background: #fff; }
.inspect-body { position: relative; flex: 1; display: flex; min-height: 0; background: #fff; }
.inspect-body .inspect-frame { flex: 1; }
.inspect-loading {
  position: absolute; inset: 0; z-index: 2;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: #fff;
  color: #667; font-size: 14px;
}
.inspect-loading::before {
  content: '';
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.12);
  border-top-color: #22d3ee;
  animation: inspectSpin 0.8s linear infinite;
}
@keyframes inspectSpin { to { transform: rotate(360deg); } }
.inspect-foot {
  padding: 8px 18px;
  font-size: 12px;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  text-align: center;
}
@media (max-width: 767px) {
  .inspect-overlay { padding: 0; }
  .inspect-modal { width: 100vw; height: 100vh; border-radius: 0; border: 0; }
}

/* ===== 公司 Logo 图片 ===== */
/* 原图 200x200 方形商标图标（含 swoosh + 速大优选文字），需严格限高限宽以适配 navbar/footer */
.nav-logo-img,
.footer-logo-img {
  display: block;
  border-radius: 6px;
  object-fit: contain;
  flex-shrink: 0;
}
.nav-logo-img {
  height: 28px;
  max-height: 28px;
  width: 28px;
  max-width: 28px;
}
.footer-logo-img {
  height: 44px;
  max-height: 44px;
  width: auto;
  max-width: 140px;
}
@media (max-width: 767px) {
  .nav-logo-img {
    height: 28px;
    max-height: 28px;
    width: 28px;
    max-width: 28px;
  }
  .footer-logo-img {
    height: 36px;
    max-height: 36px;
    max-width: 120px;
  }
}

ul, ol { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

::selection { background: rgba(34,211,238,0.3); color: #fff; }

/* ===== 工具类 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.mono { font-family: var(--font-mono); }

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 7px 15px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface-glass);
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow-accent);
}

.section { padding: var(--space-20) 0; }
.section-tight { padding: var(--space-12) 0; }

.section-title {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--text);
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-2);
  text-align: center;
  margin-top: var(--space-3);
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

.page-header {
  padding: 116px 0 var(--space-12);
  text-align: center;
}
.page-header h1 {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--text);
}
.page-header p {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-2);
  margin-top: var(--space-3);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-normal);
  white-space: nowrap;
  user-select: none;
  position: relative;
}

.btn-primary {
  background: var(--grad-accent);
  color: #fff;
  box-shadow: 0 8px 24px var(--glow-accent);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px var(--glow-accent);
}

.btn-outline {
  background: var(--surface-glass);
  color: var(--text);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(6px);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(34,211,238,0.08);
}

.btn-ghost-link {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}
.btn-ghost-link:hover { gap: 9px; }
.btn-ghost-link::after { content: '\2192'; font-size: 16px; }

.btn-lg { padding: 15px 34px; font-size: 15px; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10,11,16,0.72);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: border-color var(--transition-normal), background var(--transition-normal);
}
.navbar.scrolled {
  background: rgba(8,9,13,0.92);
  border-bottom-color: var(--border-strong);
}

.navbar-inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { display: flex; align-items: center; gap: var(--space-2); }
.nav-logo-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--grad-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 14px var(--glow-accent);
}
.nav-logo-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-links { display: flex; align-items: center; gap: var(--space-1); }
.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}
.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--text); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px; left: var(--space-4); right: var(--space-4);
  height: 2px;
  background: var(--grad-accent);
  border-radius: 1px;
}

.nav-actions { display: flex; align-items: center; gap: var(--space-4); }
.nav-secondary-link { font-size: 14px; font-weight: 600; color: var(--accent); }
.nav-secondary-link:hover { text-decoration: underline; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: all var(--transition-fast);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4px,4px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4px,-4px); }

/* ===== Hero 区 ===== */
.hero { padding: calc(var(--nav-height) + 76px) 0 88px; position: relative; }
.hero-grid {
  display: grid;
  grid-template-columns: 54fr 46fr;
  gap: var(--space-12);
  align-items: center;
}
.hero-text { padding-right: var(--space-6); }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.hero-tag-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow-accent);
}
.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: var(--space-5);
}
.hero-subtitle {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-2);
  margin-bottom: var(--space-8);
  max-width: 520px;
}
.hero-cta { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* Hero 英文 eyebrow（科技感小标签） */
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-6);
}
.hero-eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow-accent);
}

/* Hero 玻璃面板辉光描边 */
.hero-panel {
  box-shadow: var(--shadow), 0 0 0 1px rgba(34,211,238,0.10);
}
.hero-panel:hover {
  border-color: rgba(34,211,238,0.32);
  box-shadow: var(--shadow), 0 0 0 1px rgba(34,211,238,0.22);
}

/* Hero 数据卡（青色霓虹边框） */
.hero-stat {
  position: relative;
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: inset 0 0 0 1px rgba(34,211,238,0.04);
  overflow: hidden;
}
.hero-stat::before {
  content: '';
  position: absolute;
  top: 0; left: 18%; right: 18%;
  height: 2px;
  background: var(--grad-accent);
  border-radius: 0 0 2px 2px;
  opacity: 0.8;
}

/* 特性卡（发光图标框） */
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.04);
  padding: var(--space-8);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(360px circle at 100% 0%, rgba(34,211,238,0.10), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}
.feature-card:hover {
  border-color: rgba(34,211,238,0.45);
  transform: translateY(-4px);
  box-shadow: 0 22px 60px rgba(34,211,238,0.14), 0 0 0 1px rgba(34,211,238,0.30);
}
.feature-card:hover::after { opacity: 1; }
.feature-card-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: var(--space-5);
  background: var(--grad-accent);
  box-shadow: 0 8px 22px var(--glow-accent);
  position: relative;
}
.feature-card-icon::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 15px;
  background: var(--grad-tech);
  z-index: -1;
  filter: blur(10px);
  opacity: 0.65;
}
.feature-card-title { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: var(--space-2); letter-spacing: -0.01em; }
.feature-card-desc { font-size: 14px; color: var(--text-2); line-height: 1.65; }

/* Hero 右侧玻璃面板 */
.hero-panel {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-8);
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.hero-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at 100% 0%, rgba(88,200,255,0.12), transparent 60%);
  pointer-events: none;
}
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  position: relative;
}
.hero-metric { text-align: center; }
.hero-metric-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}
.hero-metric-unit { font-size: 16px; font-weight: 600; color: var(--accent); }
.hero-metric-label {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-2);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.metric-status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--status-green);
  box-shadow: 0 0 8px rgba(52,211,153,0.6);
}

/* Hero 流程图 */
.hero-flow { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); }
.hero-flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}
.hero-flow-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cool);
  transition: all var(--transition-normal);
}
.hero-flow-step:hover .hero-flow-icon {
  background: var(--grad-accent);
  color: #fff;
  transform: scale(1.12);
  box-shadow: 0 6px 18px var(--glow-accent);
}
.hero-flow-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}
.hero-flow-arrow {
  flex: 1;
  height: 2px;
  background: var(--border-strong);
  position: relative;
  margin: 0 -4px;
}
.hero-flow-arrow::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-left: 6px solid var(--text-3);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}

/* ===== 能力矩阵 ===== */
.matrix-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: var(--space-2);
  margin-top: var(--space-12);
}
.matrix-table th, .matrix-table td {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 14px;
}
.matrix-table thead th {
  background: var(--surface-2);
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
}
.matrix-table tbody tr:nth-child(odd) td { background: var(--surface); }
.matrix-table tbody tr:nth-child(even) td { background: var(--bg-2); }
.matrix-table tbody tr { transition: background var(--transition-fast); }
.matrix-table tbody tr:hover td { background: var(--surface-2); }
.matrix-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text);
}
.matrix-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
}
.matrix-check.full { background: var(--accent); }
.matrix-check.full svg { color: #fff; }
.matrix-check.half { background: transparent; border: 1.5px solid var(--border-strong); }
.matrix-check.half svg { color: var(--text-3); }
.matrix-check.empty { background: transparent; }
.matrix-check svg { width: 12px; height: 12px; }

/* ===== 时间线 ===== */
.timeline { position: relative; margin-top: var(--space-12); }
.timeline::before {
  content: '';
  position: absolute;
  left: 6px; top: 12px; bottom: 12px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--accent-cool-2));
  opacity: 0.5;
}
.timeline-item { position: relative; padding-left: 40px; margin-bottom: var(--space-8); }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-node {
  position: absolute;
  left: 0; top: 12px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 2px solid var(--bg);
  z-index: 1;
  transition: all var(--transition-normal);
}
.timeline-item.in-view .timeline-node {
  background: var(--accent);
  box-shadow: 0 0 14px var(--glow-accent);
  animation: nodePulse 600ms ease-out;
}
@keyframes nodePulse {
  0% { transform: scale(0.8); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-6);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}
.timeline-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.timeline-client { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: var(--space-4); }
.timeline-stages { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.timeline-stage { flex: 1; min-width: 180px; }
.timeline-stage-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.timeline-stage-content {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}
.timeline-stage.problem .timeline-stage-content { background: var(--light-gray); color: var(--text-2); }
.timeline-stage.solution .timeline-stage-content { background: var(--light-blue); color: var(--text); }
.timeline-stage.result .timeline-stage-content {
  background: var(--light-green);
  color: var(--status-green);
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-mono);
}

/* ===== 团队 + 资质 ===== */
.team-credentials { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); margin-top: var(--space-12); }
.team-members { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.team-member { display: flex; align-items: center; gap: var(--space-3); }
.team-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}
.team-info-name { font-size: 14px; font-weight: 600; color: var(--text); }
.team-info-role { font-size: 12px; font-weight: 400; color: var(--text-2); }

.credentials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.credential-badge {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  filter: grayscale(100%);
  transition: filter 400ms, border-color var(--transition-fast), transform var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}
.credential-badge:hover { filter: grayscale(0%); border-color: var(--border-strong); transform: translateY(-2px); }
.credential-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cool);
}
.credential-name { font-size: 12px; font-weight: 500; color: var(--text-2); }

/* 信任数据条 */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-12);
  border-top: 1px solid var(--border);
}
.trust-item { text-align: center; }
.trust-number {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}
.trust-number-suffix { font-size: 20px; font-weight: 600; color: var(--accent); }
.trust-label { font-size: 14px; font-weight: 400; color: var(--text-2); margin-top: var(--space-3); }
.trust-underline { width: 26px; height: 2px; background: var(--grad-accent); margin: var(--space-3) auto 0; border-radius: 1px; }

/* ===== CTA 表单区 ===== */
.cta-section {
  background:
    radial-gradient(700px circle at 80% 0%, rgba(34,211,238,0.10), transparent 55%),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--space-20) 0;
}
.cta-grid { display: grid; grid-template-columns: 58fr 42fr; gap: var(--space-12); align-items: start; }
.cta-form { background: transparent; }
.cta-form-title { font-size: 26px; font-weight: 700; color: var(--text); margin-bottom: var(--space-2); letter-spacing: -0.02em; }
.cta-form-desc { font-size: 14px; color: var(--text-2); margin-bottom: var(--space-8); }

.form-group { margin-bottom: var(--space-6); }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-2);
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px var(--space-4);
  font-size: 14px;
  font-weight: 400;
  color: var(--text);
  transition: all var(--transition-fast);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--placeholder); }
.form-select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%), linear-gradient(135deg, var(--text-3) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; }
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.18);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-error { font-size: 12px; color: var(--accent); margin-top: var(--space-1); display: none; }
.form-error.show { display: block; }
.form-input.error, .form-textarea.error, .form-select.error { border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }

/* 回执卡 */
.receipt-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-8);
}
.receipt-icon {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cool);
  margin-bottom: var(--space-6);
}
.receipt-title { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: var(--space-2); }
.receipt-text { font-size: 14px; font-weight: 400; color: var(--text-2); line-height: 1.6; }
.receipt-detail { margin-top: var(--space-6); padding-top: var(--space-6); border-top: 1px solid var(--border); }
.receipt-detail-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-3); font-size: 14px; }
.receipt-detail-label { color: var(--text-2); }
.receipt-detail-value { color: var(--text); font-weight: 600; }
.receipt-success { display: none; text-align: center; padding: var(--space-8); }
.receipt-success.show { display: block; animation: fadeInUp var(--transition-slow) ease-out; }

/* ===== 页脚 ===== */
.footer {
  background: #06070a;
  color: #fff;
  padding: var(--space-16) 0 var(--space-6);
  border-top: 1px solid var(--border);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-8); margin-bottom: var(--space-12); }
.footer-brand { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-2); }
.footer-desc { font-size: 14px; font-weight: 400; color: rgba(255,255,255,0.55); line-height: 1.7; margin-bottom: var(--space-4); max-width: 320px; }
.footer-col-title { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: var(--space-4); }
.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-link { font-size: 14px; font-weight: 400; color: rgba(255,255,255,0.55); transition: color var(--transition-fast); }
.footer-link:hover { color: var(--accent); }
.footer-contact-item { display: flex; align-items: center; gap: var(--space-2); font-size: 14px; color: rgba(255,255,255,0.55); margin-bottom: var(--space-3); }
.footer-contact-item svg { flex-shrink: 0; opacity: 0.6; }
.footer-seo { padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.08); margin-bottom: var(--space-4); }
.footer-seo-label { font-size: 12px; font-weight: 500; color: rgba(255,255,255,0.4); margin-bottom: var(--space-2); }
.footer-seo-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.footer-seo-tag { font-size: 12px; color: rgba(255,255,255,0.5); padding: 4px var(--space-2); background: rgba(255,255,255,0.05); border-radius: var(--radius-sm); }
.footer-bottom { padding-top: var(--space-4); border-top: 1px solid rgba(255,255,255,0.08); font-size: 12px; color: rgba(255,255,255,0.4); text-align: center; }

/* ===== 服务 / 产品卡片 ===== */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-12); }
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.04);
  padding: var(--space-8);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(360px circle at 100% 0%, rgba(34,211,238,0.10), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}
.service-card:hover { border-color: rgba(34,211,238,0.45); transform: translateY(-4px); box-shadow: 0 22px 60px rgba(34,211,238,0.14), 0 0 0 1px rgba(34,211,238,0.30); }
.service-card:hover::after { opacity: 1; }
.service-card-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cool);
  margin-bottom: var(--space-5);
  transition: all var(--transition-normal);
}
.service-card:hover .service-card-icon { background: var(--grad-accent); color: #fff; }
.service-card-title { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: var(--space-2); letter-spacing: -0.01em; }
.service-card-desc { font-size: 14px; color: var(--text-2); line-height: 1.65; flex: 1; margin-bottom: var(--space-6); }
.service-card-features { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-6); }
.service-feature { display: flex; align-items: center; gap: var(--space-2); font-size: 14px; color: var(--text-2); }
.service-feature-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; box-shadow: 0 0 8px var(--glow-accent); }

/* ===== 案例卡片 ===== */
.case-filters { display: flex; gap: var(--space-2); justify-content: center; margin-bottom: var(--space-12); flex-wrap: wrap; }
.case-filter {
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.case-filter:hover { border-color: var(--accent); color: var(--accent); }
.case-filter.active { background: var(--grad-accent); color: #fff; border-color: transparent; box-shadow: 0 6px 18px var(--glow-accent); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}
.case-card:hover { border-color: var(--border-strong); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.case-card-header { padding: var(--space-6); border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: var(--space-3); }
.case-card-logo {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.case-card-client { font-size: 16px; font-weight: 700; color: var(--text); }
.case-card-industry { font-size: 12px; color: var(--text-2); }
.case-card-body { padding: var(--space-6); flex: 1; display: flex; flex-direction: column; gap: var(--space-3); }
.case-card-stage { display: flex; align-items: flex-start; gap: var(--space-2); font-size: 13px; line-height: 1.5; }
.case-card-stage-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  margin-top: 1px;
}
.case-card-stage.problem .case-card-stage-label { background: var(--light-gray); color: var(--text-2); }
.case-card-stage.solution .case-card-stage-label { background: var(--light-blue); color: var(--text); }
.case-card-stage.result .case-card-stage-label { background: var(--light-green); color: var(--accent); }
.case-card-stage-text { color: var(--text-2); }
.case-card-stage.result .case-card-stage-text { color: var(--status-green); font-weight: 700; font-family: var(--font-mono); }
.case-card-footer { padding: var(--space-4) var(--space-6); border-top: 1px solid var(--border); }

/* ===== 关于我们页 ===== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.about-intro-text h2 { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; color: var(--text); margin-bottom: var(--space-4); }
.about-intro-text p { font-size: 16px; line-height: 1.75; color: var(--text-2); margin-bottom: var(--space-4); }
.about-intro-stats { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: var(--space-8); }
.about-intro-stat { display: flex; justify-content: space-between; align-items: center; padding: var(--space-4) 0; border-bottom: 1px solid var(--border); }
.about-intro-stat:last-child { border-bottom: none; }
.about-intro-stat-label { font-size: 14px; color: var(--text-2); }
.about-intro-stat-value { font-family: var(--font-mono); font-size: 24px; font-weight: 700; color: var(--text); }

.history-timeline { margin-top: var(--space-12); }
.history-item { display: grid; grid-template-columns: 120px 1fr; gap: var(--space-8); padding: var(--space-6) 0; border-bottom: 1px solid var(--border); }
.history-year { font-family: var(--font-mono); font-size: 24px; font-weight: 700; background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.history-content h3 { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: var(--space-2); }
.history-content p { font-size: 14px; color: var(--text-2); line-height: 1.6; }

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); margin-top: var(--space-12); }
.contact-info-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: var(--space-8); }
.contact-info-item { display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-6); }
.contact-info-item:last-child { margin-bottom: 0; }
.contact-info-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cool);
  flex-shrink: 0;
}
.contact-info-label { font-size: 12px; font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-1); }
.contact-info-value { font-size: 16px; font-weight: 600; color: var(--text); }
.contact-map {
  margin-top: var(--space-12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background-color: var(--surface);
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.contact-map::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at 50% 50%, rgba(88,200,255,0.10), transparent 60%);
}
.contact-map-pin { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); position: relative; }
.contact-map-pin-dot {
  width: 34px; height: 34px;
  border-radius: 50% 50% 50% 0;
  background: var(--grad-accent);
  transform: rotate(-45deg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px var(--glow-accent);
}
.contact-map-pin-dot::after { content: ''; width: 12px; height: 12px; border-radius: 50%; background: #fff; }
.contact-map-pin-label { background: var(--surface-2); padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm); border: 1px solid var(--border-strong); font-size: 14px; font-weight: 600; color: var(--text); }

/* ===== 详情页 ===== */
.detail-hero { padding: calc(var(--nav-height) + 76px) 0 var(--space-12); }
.detail-hero .container { max-width: 800px; }
.detail-breadcrumb { display: flex; align-items: center; gap: var(--space-2); font-size: 14px; color: var(--text-2); margin-bottom: var(--space-6); }
.detail-breadcrumb a:hover { color: var(--accent); }
.detail-title { font-size: 38px; font-weight: 800; letter-spacing: -0.035em; color: var(--text); margin-bottom: var(--space-4); }
.detail-meta { display: flex; gap: var(--space-6); margin-bottom: var(--space-8); font-size: 14px; color: var(--text-2); flex-wrap: wrap; }
.detail-meta span { display: inline-flex; align-items: center; gap: 6px; }
.detail-content { max-width: 800px; margin: 0 auto; }
.detail-content h2 { font-size: 24px; font-weight: 700; color: var(--text); margin: var(--space-8) 0 var(--space-4); letter-spacing: -0.01em; }
.detail-content h3 { font-size: 18px; font-weight: 600; color: var(--text); margin: var(--space-6) 0 var(--space-3); }
.detail-content p { font-size: 16px; line-height: 1.8; color: var(--text-2); margin-bottom: var(--space-4); }
.detail-content ul { margin-bottom: var(--space-4); padding-left: var(--space-6); }
.detail-content li { font-size: 16px; line-height: 1.8; color: var(--text-2); list-style: disc; }
.detail-content blockquote { border-left: 3px solid var(--accent); padding-left: var(--space-6); margin: var(--space-6) 0; font-size: 18px; font-style: italic; color: var(--text); }
.detail-nav { display: flex; justify-content: space-between; margin-top: var(--space-16); padding-top: var(--space-8); border-top: 1px solid var(--border); }
.detail-nav-link { display: flex; flex-direction: column; gap: var(--space-1); }
.detail-nav-link span:first-child { font-size: 12px; color: var(--text-2); }
.detail-nav-link span:last-child { font-size: 16px; font-weight: 600; color: var(--text); }
.detail-nav-link:hover span:last-child { color: var(--accent); }
.detail-nav-link.next { text-align: right; }

/* ===== 序列号查询 / 验机报告 ===== */
.serial-section { position: relative; }
.serial-box {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-12);
  backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
}
.serial-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px circle at 0% 0%, rgba(34,211,238,0.12), transparent 55%),
    radial-gradient(420px circle at 100% 100%, rgba(88,200,255,0.12), transparent 55%);
  pointer-events: none;
}
.serial-head { text-align: center; position: relative; margin-bottom: var(--space-8); }
.serial-head h2 { font-size: 28px; font-weight: 700; color: var(--text); letter-spacing: -0.02em; margin-bottom: var(--space-2); }
.serial-head p { font-size: 15px; color: var(--text-2); }

.serial-form-row { display: flex; gap: var(--space-3); position: relative; max-width: 720px; margin: 0 auto; }
.serial-input-wrap { flex: 1; position: relative; }
.serial-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 16px 18px 16px 46px;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--text);
  transition: all var(--transition-fast);
}
.serial-input::placeholder { color: var(--placeholder); letter-spacing: normal; }
.serial-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,0.18); }
.serial-input-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--accent); }
.serial-form-row .btn { padding: 16px 30px; }

.serial-hint { text-align: center; font-size: 13px; color: var(--text-3); margin-top: var(--space-4); }

/* 结果 / 验机报告 */
.serial-result { display: none; position: relative; margin-top: var(--space-8); }
.serial-result.show { display: block; animation: fadeInUp var(--transition-slow) ease-out; }

.inspect-report {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: var(--space-8);
}
.inspect-report-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.inspect-title { font-size: 18px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: var(--space-2); }
.inspect-serial { font-family: var(--font-mono); font-size: 13px; color: var(--text-2); background: var(--surface-2); padding: 6px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.grade-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
}
.grade-badge.A { background: var(--light-green); color: var(--status-green); border: 1px solid rgba(52,211,153,0.4); }
.grade-badge.B { background: rgba(255,177,92,0.14); color: #ffb15c; border: 1px solid rgba(255,177,92,0.4); }
.grade-badge.C { background: rgba(255,94,43,0.14); color: #ff7a59; border: 1px solid rgba(255,94,43,0.4); }

.inspect-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.inspect-item { display: flex; justify-content: space-between; align-items: center; padding: var(--space-3) var(--space-4); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.inspect-label { font-size: 13px; color: var(--text-2); }
.inspect-value { font-size: 14px; font-weight: 600; color: var(--text); font-family: var(--font-mono); }
.inspect-value.ok { color: var(--status-green); }
.inspect-value.warn { color: var(--accent-2); }

.serial-loading { display: none; text-align: center; padding: var(--space-8) 0; }
.serial-loading.show { display: block; }
.spinner {
  width: 34px; height: 34px;
  border: 3px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 历代机型库 / 机型收纳（折叠手风琴） ===== */
.model-explorer-section { padding: var(--space-16) 0; border-top: 1px solid var(--border); }
.model-explorer-head { max-width: 800px; margin: 0 auto var(--space-12); text-align: center; }
.model-explorer-head .eyebrow { margin-bottom: var(--space-4); }
.model-explorer-head h2 { font-size: 32px; font-weight: 800; letter-spacing: -0.03em; color: var(--text); margin-bottom: var(--space-3); }
.model-explorer-head p { font-size: 15px; color: var(--text-2); line-height: 1.7; }

.model-explorer { max-width: 920px; margin: 0 auto; }
.model-explorer + .model-explorer { margin-top: var(--space-16); }

/* 子系列标题（如 MacBook Air / Pro） */
.model-subtitle {
  display: flex; align-items: center; gap: var(--space-3);
  font-size: 22px; font-weight: 700; color: var(--text);
  letter-spacing: -0.02em; margin-bottom: var(--space-6);
}
.model-subtitle::before {
  content: ''; width: 5px; height: 22px; border-radius: 3px;
  background: var(--grad-accent); box-shadow: 0 0 12px var(--glow-accent);
}

/* 年份分组 */
.model-year { margin-bottom: var(--space-8); }
.model-year-head {
  display: flex; align-items: baseline; gap: var(--space-3);
  margin-bottom: var(--space-4); padding-bottom: var(--space-2);
  border-bottom: 1px dashed var(--border-strong);
}
.model-year-num {
  font-family: var(--font-mono); font-size: 26px; font-weight: 700;
  background: var(--grad-tech); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent; letter-spacing: -0.03em;
}
.model-year-count { font-size: 13px; color: var(--text-3); }
.model-year-rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--border-strong), transparent); align-self: center; }

/* 机型行（卡片） */
.model-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
  margin-bottom: var(--space-3);
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}
.model-row:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.model-row.open { border-color: rgba(34,211,238,0.4); box-shadow: 0 0 0 1px rgba(34,211,238,0.22), var(--shadow); }
.model-row-trigger {
  width: 100%;
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-5); text-align: left;
  cursor: pointer;
}
.model-thumb {
  width: 62px; height: 46px; flex-shrink: 0;
  border-radius: 9px;
  background:
    radial-gradient(80px circle at 30% 20%, rgba(34,211,238,0.20), transparent 65%),
    radial-gradient(70px circle at 80% 90%, rgba(168,85,247,0.20), transparent 65%),
    var(--surface-2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.model-thumb svg { width: 100%; height: 100%; }
.model-row-name { font-size: 16px; font-weight: 600; color: var(--text); flex: 1; letter-spacing: -0.01em; }
.model-row-trigger:hover .model-row-name { color: var(--accent); }
.model-chip {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  padding: 4px 10px; border-radius: 999px;
  background: var(--light-blue); color: var(--accent-cool);
  white-space: nowrap; flex-shrink: 0;
}
.model-row-chevron {
  width: 18px; height: 18px; color: var(--text-3); flex-shrink: 0;
  transition: transform var(--transition-normal), color var(--transition-normal);
}
.model-row.open .model-row-chevron { transform: rotate(180deg); color: var(--accent); }

/* 展开详情面板 */
.model-row-panel {
  max-height: 0; overflow: hidden;
  transition: max-height var(--transition-slow);
}
.model-row-panel-inner { padding: 0 var(--space-6) var(--space-6); }
.model-detail {
  display: grid; grid-template-columns: 220px 1fr; gap: var(--space-6);
  padding-top: var(--space-5); border-top: 1px solid var(--border);
}
.model-photo {
  position: relative;
  aspect-ratio: 4 / 3; border-radius: var(--radius-sm);
  background:
    radial-gradient(320px circle at 30% 20%, rgba(34,211,238,0.16), transparent 60%),
    radial-gradient(300px circle at 80% 90%, rgba(168,85,247,0.16), transparent 60%),
    var(--surface-2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.model-photo > svg { width: 100%; height: 100%; }
.model-photo-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 8px;
  background: var(--surface-2);
}
.model-photo-fallback { position: absolute; inset: 0; }
.model-photo-fallback svg { width: 100%; height: 100%; }

/* 规格清单（苹果官网风格：字段名 + 值，细分割线） */
.model-info { display: flex; flex-direction: column; }
.model-info-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: var(--space-4);
  font-size: 14px;
  line-height: 1.7;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
}
.model-info-row:first-child { padding-top: 0; }
.model-info-key { color: var(--text-3); }
.model-info-val { color: var(--text); font-weight: 500; word-break: break-word; }
.model-inline-link {
  color: var(--accent-cool);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}
.model-inline-link:hover { color: var(--accent); text-decoration: underline; }

.model-empty {
  text-align: center; padding: var(--space-12) var(--space-6);
  border: 1px dashed var(--border-strong); border-radius: var(--radius);
  color: var(--text-3); font-size: 14px;
}

@media (max-width: 767px) {
  .model-detail { grid-template-columns: 1fr; }
  .model-photo { max-width: 100%; }
  .model-thumb { width: 52px; height: 40px; }
  .model-row-trigger { padding: var(--space-3) var(--space-4); }
  .model-row-panel-inner { padding: 0 var(--space-4) var(--space-4); }
  .model-info-row { grid-template-columns: 96px 1fr; }
}

/* ===== 首页案例轮播（6个一屏 · 左右滚动） ===== */
.case-carousel { position: relative; }
.case-track {
  display: flex;
  overflow: hidden;
  transition: transform var(--transition-slow);
}
.case-page {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  padding: 0 var(--space-2);
}
.case-page .case-card { height: 100%; }
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  line-height: 1;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow);
}
.carousel-arrow:hover { border-color: var(--accent); color: var(--accent); background: rgba(34,211,238,0.08); }
.carousel-arrow.prev { left: -24px; }
.carousel-arrow.next { right: -24px; }
.carousel-arrow.disabled { opacity: 0.32; pointer-events: none; }
.carousel-dots { display: flex; justify-content: center; gap: 8px; margin-top: var(--space-6); }
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  padding: 0;
  background: var(--border-strong);
  border: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.carousel-dot.active {
  width: 24px;
  background: var(--grad-accent);
  box-shadow: 0 0 8px var(--glow-accent);
}
@media (max-width: 991px) {
  .case-page { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 639px) {
  .case-page { grid-template-columns: 1fr; }
  .carousel-arrow { width: 34px; height: 34px; font-size: 20px; }
  .carousel-arrow.prev { left: 2px; }
  .carousel-arrow.next { right: 2px; }
}

/* ===== 产品详情页 · 客户参考 ===== */
.related-case {
  max-width: 800px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-8);
}
.related-case-label {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
  margin-bottom: var(--space-4);
}
.related-case-label::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--glow-accent); }
.related-case h3 { font-size: 20px; font-weight: 700; color: var(--text); margin-bottom: var(--space-4); }
.related-case-link {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: border-color var(--transition-normal), background var(--transition-normal), transform var(--transition-normal);
}
.related-case-link:hover { border-color: var(--accent); background: rgba(34,211,238,0.06); transform: translateY(-2px); }
.related-case-name { font-size: 16px; font-weight: 600; color: var(--text); }
.related-case-arrow { font-size: 14px; color: var(--accent); white-space: nowrap; flex-shrink: 0; }

/* ===== 滚动渐显动画 ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 520ms ease-out, transform 520ms ease-out; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--surface-2);
  color: var(--text);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-size: 14px;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-hover);
  z-index: 2000;
  transition: transform var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  .hero-grid { gap: var(--space-8); }
  .hero-title { font-size: 44px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 991px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-text { padding-right: 0; }
  .hero-title { font-size: 38px; }
  .hero-subtitle { font-size: 16px; }
  .team-credentials { grid-template-columns: 1fr; }
  .cta-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: 1fr; }
  .inspect-grid { grid-template-columns: 1fr; }
  .matrix-table { display: block; overflow-x: auto; }
}
@media (max-width: 767px) {
  .section { padding: var(--space-12) 0; }
  .section-title { font-size: 28px; }
  .container { padding: 0 var(--space-4); }

  .nav-links {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0; bottom: 0;
    background: rgba(8,9,13,0.98);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    gap: var(--space-1);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    backdrop-filter: blur(18px);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { padding: var(--space-4); font-size: 16px; border-radius: var(--radius-sm); border-bottom: 1px solid var(--border); }
  .nav-link.active::after { display: none; }
  .nav-actions .nav-secondary-link { display: none; }
  .nav-toggle { display: flex; }

  .hero { padding: calc(var(--nav-height) + 44px) 0 var(--space-12); }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 15px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .hero-panel { padding: var(--space-6); }
  .hero-metrics { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero-flow { flex-wrap: wrap; justify-content: center; }
  .hero-flow-arrow { display: none; }

  .matrix-table-wrapper { display: none; }
  .matrix-cards-mobile { display: flex !important; flex-direction: column; gap: var(--space-4); margin-top: var(--space-8); }
  .matrix-card-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: var(--space-6); }
  .matrix-card-item h4 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: var(--space-3); }
  .matrix-card-features { display: flex; flex-direction: column; gap: var(--space-2); }
  .matrix-card-feature { display: flex; align-items: center; gap: var(--space-2); font-size: 13px; color: var(--text-2); }

  .timeline-item { padding-left: 32px; }
  .timeline-stages { flex-direction: column; }
  .timeline-stage { min-width: 100%; }

  .team-members { grid-template-columns: 1fr; }
  .credentials-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-bar { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .case-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .serial-form-row { flex-direction: column; }
  .service-grid { grid-template-columns: 1fr; }
  .page-header { padding: 84px 0 var(--space-8); }
  .page-header h1 { font-size: 28px; }
  .page-header p { font-size: 14px; }
  .detail-title { font-size: 24px; }
  .detail-content h2 { font-size: 20px; }
  .detail-content p, .detail-content li { font-size: 14px; }
  .history-item { grid-template-columns: 1fr; gap: var(--space-2); }
  .history-year { font-size: 20px; }
  .serial-box { padding: var(--space-6); }
}

.matrix-cards-mobile { display: none; }

@media print {
  .navbar, .nav-toggle, .hero-flow, .toast { display: none; }
  body { background: #fff; background-image: none; color: #000; }
}