/* ========================================================
   驭见 AI — 官方设计系统 (Prestige Architecture Edition)
   设计原则：精美、大气、简约、专业，专为车企决策层与投资人打造
   ======================================================== */

/* 1. 本地化精简字体定义 (零外部依赖，100% 本地瞬时加载) */
@font-face {
  font-family: 'DM Mono';
  src: url('fonts/dm-mono-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Mono';
  src: url('fonts/dm-mono-medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  /* 品牌色彩系统：顶级车企与高科技 SaaS 审美 */
  --bg-page: #fbfbf9;
  --bg-card: #ffffff;
  --bg-subtle: #f4f4f0;
  --bg-dark: #0c1411;
  --bg-dark-card: #131f1a;

  /* 文字层级：深邃石墨碳灰 */
  --ink: #0a120e;
  --ink-secondary: #2c3832;
  --ink-muted: #627068;
  --ink-light: #94a39b;

  /* 品牌高亮：极光翡翠绿 (象征智能、电动化与蓬勃生机) */
  --green: #0a8754;
  --green-hover: #076d43;
  --green-light: #e6f6ee;
  --green-subtle: #f0faf5;
  --green-border: #a4e1c5;
  --green-glow: rgba(10, 135, 84, 0.16);

  /* 辅助重点：钛金暖橙 (用于关键指标提示与临界点高亮) */
  --amber: #e66f22;
  --amber-light: #fdf1e7;
  --amber-border: #f8c9a8;

  /* 边框与微光 */
  --line: #e3e7e1;
  --line-light: #edf0eb;
  --line-dark: rgba(255, 255, 255, 0.12);

  /* 现代严谨字体栈 (优先系统级视网膜高清黑体) */
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-num: "DM Mono", "SF Mono", ui-monospace, monospace;

  /* 阴影层次 */
  --shadow-sm: 0 2px 8px rgba(10, 20, 15, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(10, 20, 15, 0.06), 0 2px 6px -1px rgba(10, 20, 15, 0.02);
  --shadow-lg: 0 20px 48px -12px rgba(10, 20, 15, 0.1), 0 4px 16px -2px rgba(10, 20, 15, 0.03);
  --shadow-float: 0 28px 64px -16px rgba(10, 20, 15, 0.14);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

/* 基础重置 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  color: var(--ink);
  font: 16px/1.7 var(--font-body);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.02em;
  font-weight: 700;
}
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* 页面顶部微光进度条 */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--green), var(--amber));
  z-index: 100;
  transition: width 0.1s linear;
}

/* 顶栏 Header */
header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 74px;
  background: rgba(251, 251, 249, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 1360px;
  margin: 0 auto;
  height: 100%;
  padding: 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}
.logo span {
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: var(--green);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  margin-left: 8px;
  letter-spacing: 0.5px;
}
header nav {
  display: flex;
  gap: 32px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-secondary);
}
header nav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}
header nav a:hover { color: var(--green); }
header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--green);
  transition: width 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}
header nav a:hover::after { width: 100%; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  transition: all 0.2s ease;
}
.nav-download:hover {
  background: #fff;
  border-color: var(--green);
  color: var(--green);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.badge-pdf {
  font-family: var(--font-num);
  font-size: 10px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(230, 111, 34, 0.12);
  color: var(--amber);
  letter-spacing: 0.5px;
}
.nav-cta {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--ink);
  padding: 9px 20px;
  border-radius: var(--radius-full);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  background: var(--green);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--green-glow);
}

/* 通用按钮 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}
.button:hover { transform: translateY(-2px); }
.button.primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 8px 24px -6px var(--green-glow);
}
.button.primary:hover {
  background: var(--green-hover);
  box-shadow: 0 12px 28px -6px rgba(10, 135, 84, 0.3);
}
.button.ghost {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  color: var(--ink);
  border-color: var(--line);
}
.button.ghost:hover {
  background: #fff;
  border-color: var(--ink);
}

/* ========================================================
   01 首屏 Hero：汽车展厅氛围 + 现代科技排版
   ======================================================== */
.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #f7f6f2;
}
.hero-bg-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-car-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% 48%;
  display: block;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    /* 左侧主过渡：确保左侧文本区域纯净且极易阅读 */
    linear-gradient(90deg, #f7f6f2 0%, rgba(247, 246, 242, 0.98) 38%, rgba(247, 246, 242, 0.75) 62%, rgba(247, 246, 242, 0) 100%),
    /* 底部柔和过渡 */
    linear-gradient(0deg, #fbfbf9 0%, rgba(251, 251, 249, 0) 30%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(720px, 62%);
  margin-left: max(48px, calc((100% - 1360px) / 2 + 48px));
  padding: 72px 0 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-secondary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px var(--green-light);
  animation: pulseGreen 2.5s infinite;
}
@keyframes pulseGreen {
  0%, 100% { box-shadow: 0 0 0 3px var(--green-light); }
  50% { box-shadow: 0 0 0 6px rgba(10, 135, 84, 0.25); }
}

.hero h1 {
  font-size: clamp(46px, 5.2vw, 76px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}
.hero h1 .highlight {
  color: var(--green);
}
.hero-copy {
  font-size: 18.5px;
  line-height: 1.8;
  color: var(--ink-secondary);
  max-width: 580px;
  margin-bottom: 34px;
}
.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* 核心指标展示 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 0;
  margin-top: 50px;
  padding-top: 32px;
  border-top: 1px solid rgba(10, 18, 14, 0.09);
  max-width: 660px;
}
.hero-stats > div {
  padding: 0 30px;
  border-left: 1px solid rgba(10, 18, 14, 0.08);
}
.hero-stats > div:first-child {
  padding-left: 0;
  border-left: none;
}
.hero-stats dt {
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.hero-stats b {
  font-family: var(--font-num);
  font-size: 38px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.03em;
}
.hero-stats i {
  font-style: normal;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
}
.hero-stats dd {
  margin: 3px 0 0;
  font-size: 13px;
  color: var(--ink-muted);
}

/* ========================================================
   通用 Section 规范
   ======================================================== */
.section {
  padding: 100px 0;
}
.section-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 48px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 1.5px;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--amber);
}
h2 {
  font-size: clamp(32px, 3.4vw, 48px);
  line-height: 1.35;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
h2 span { color: var(--green); }
.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}
.section-head p:last-child {
  font-size: 17px;
  color: var(--ink-muted);
  line-height: 1.75;
}

/* ========================================================
   02 行业数据洞察 (深邃科技黑对比层)
   ======================================================== */
.industry-context {
  background: var(--bg-dark);
  color: #f1f3f0;
  position: relative;
  overflow: hidden;
}
.industry-context::after {
  content: "";
  position: absolute;
  top: 0;
  right: 15%;
  width: 500px;
  height: 260px;
  background: radial-gradient(ellipse at center, rgba(10, 135, 84, 0.22), transparent 70%);
  pointer-events: none;
}
.industry-context h2 { color: #fff; }
.industry-context h2 span { color: #7fe0b4; }
.industry-heading { margin-bottom: 40px; }
.industry-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}
.industry-stats article {
  border-left: 2px solid var(--amber);
  padding-left: 24px;
}
.industry-stats strong {
  display: block;
  font-family: var(--font-num);
  font-size: 54px;
  font-weight: 500;
  line-height: 1.15;
  color: #fff;
  letter-spacing: -0.03em;
}
.industry-stats strong span {
  font-size: 24px;
  color: #f8b886;
  margin-left: 2px;
}
.industry-stats p {
  font-size: 16px;
  font-weight: 600;
  color: #f1f3f0;
  margin: 10px 0 6px;
}
.industry-stats small {
  font-size: 13px;
  color: #a4b3aa;
  display: block;
  line-height: 1.6;
}
.pain-line {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 36px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14.5px;
  color: #d2ddd6;
}
.pain-line strong {
  color: #f8b886;
  font-weight: 600;
}

/* ========================================================
   03 产品演示：真机交互展示
   ======================================================== */
.demo-section {
  background: linear-gradient(180deg, var(--bg-page) 0%, #f4f5f0 100%);
}
.demo-heading {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 32px;
}
.demo-heading p:last-child {
  font-size: 16px;
  color: var(--ink-muted);
}
.demo-journey {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 40px;
}
.journey-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-muted);
}
.journey-steps {
  display: flex;
  gap: 8px;
  padding: 5px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
}
.journey-steps button {
  border: 0;
  background: transparent;
  color: var(--ink-secondary);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.journey-steps button:hover {
  background: var(--green-subtle);
  color: var(--green);
}
.journey-steps button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}
.demo-journey > p {
  width: 100%;
  text-align: center;
  font-size: 13.5px;
  color: var(--ink-muted);
}

.feature-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}
.feature-column {
  display: grid;
  gap: 16px;
}
.feature-card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  box-shadow: var(--shadow-sm);
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #b5d8c7;
}
.feature-card.selected {
  border-color: var(--green);
  background: linear-gradient(135deg, #ffffff 0%, var(--green-subtle) 100%);
  box-shadow: var(--shadow-md);
}
.feature-card strong {
  display: block;
  font-size: 18.5px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink);
}
.feature-card.selected strong { color: var(--green); }
.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-muted);
}

/* 手机壳模型：全面屏无挖孔，紧凑高度 */
.phone-stage {
  display: flex;
  justify-content: center;
}
.phone-device {
  position: relative;
  width: 340px;
  max-width: 100%;
  padding: 8px;
  border-radius: 40px;
  background: linear-gradient(125deg, #303b35 0%, #5d6d66 32%, #222b27 68%, #4a5953 100%);
  box-shadow: 0 32px 64px -18px rgba(10, 20, 15, 0.42), inset 0 0 0 2px rgba(255, 255, 255, 0.22);
}
.iphone-screen {
  overflow: hidden;
  border-radius: 32px;
  background: #f2f5f9;
  aspect-ratio: 9 / 17.5;
  isolation: isolate;
  position: relative;
}
.phone-device iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #f2f5f9;
  transition: opacity 0.3s ease;
}
.phone-device iframe.loading { opacity: 0.2; }
.iphone-side {
  position: absolute;
  width: 3px;
  background: #4a5953;
  left: -3px;
  border-radius: 3px;
}
.iphone-action { top: 82px; height: 18px; }
.iphone-volume { top: 124px; height: 58px; }
.iphone-power { left: auto; right: -3px; top: 146px; height: 50px; }

.preview-caption {
  text-align: center;
  font-family: var(--font-num);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--green);
  margin-top: 20px;
  min-height: 24px;
}
.demo-footer {
  text-align: center;
  margin-top: 40px;
}
.demo-footer p {
  font-size: 13px;
  color: var(--ink-muted);
  margin-top: 14px;
}

/* ========================================================
   04 商业模式与闭环工作流
   ======================================================== */
.business {
  background: var(--bg-card);
  border-top: 1px solid var(--line);
}
.model-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.model-card {
  padding: 34px 30px;
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
}
.model-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.model-card.main {
  background: var(--bg-dark);
  border-color: #1a2c24;
  color: #fff;
  box-shadow: 0 16px 40px -12px rgba(10, 20, 15, 0.35);
}
.model-card.main h3 { color: #fff; }
.model-badge {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(10, 135, 84, 0.2);
  color: #7fe0b4;
  margin-bottom: 14px;
}
.model-badge.subtle {
  background: rgba(10, 18, 14, 0.06);
  color: var(--ink-muted);
}
.model-card h3 {
  font-size: 23px;
  margin-bottom: 8px;
}
.model-highlight {
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 500;
  color: var(--green);
  margin-bottom: 12px;
}
.model-card.main .model-highlight { color: #7fe0b4; }
.model-highlight span {
  font-size: 14px;
  color: var(--ink-muted);
  font-family: var(--font-body);
}
.model-card.main .model-highlight span { color: #8ba095; }
.model-desc {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.65;
}
.model-card.main .model-desc { color: #a4b5ac; }

/* 工作流时间线：彻底去除原生 details 箭头 */
.workflow-section {
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  margin-bottom: 48px;
}
.workflow-header {
  margin-bottom: 28px;
}
.sub-label {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}
.workflow-header h3 {
  font-size: 22px;
}
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.workflow-step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.workflow-step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.step-num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  margin-bottom: 14px;
}
.step-content h4 {
  font-size: 17px;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.65;
}

/* 回本测算看板 */
.simple-market {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.simple-market-top {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.simple-market-top h3 { font-size: 26px; margin: 6px 0; }
.simple-market-top p:last-child { font-size: 14.5px; color: var(--ink-muted); }

.simple-market-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 32px 0;
}
.simple-market-results > div {
  padding: 28px;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
}
.simple-market-results .break-even-card {
  background: var(--bg-dark);
  border-color: #1a2a22;
  color: #fff;
  box-shadow: 0 12px 32px -8px rgba(10, 20, 15, 0.35);
}
.break-even-tag {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  color: #f8b886;
  background: rgba(230, 111, 34, 0.18);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}
.simple-market-results span {
  font-size: 14px;
  color: var(--ink-muted);
  display: block;
}
.simple-market-results .break-even-card span { color: #a4b5ac; }
.simple-market-results strong {
  display: block;
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 500;
  line-height: 1.25;
  color: var(--ink);
  margin: 10px 0;
}
.break-even-card strong { color: #7fe0b4; }
.simple-market-results small {
  font-size: 12.5px;
  color: var(--ink-muted);
  display: block;
  line-height: 1.5;
}
.break-even-card small { color: #9bb0a5; }

/* 动态回本圆点 */
.pips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 6px;
}
.pips i {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--amber);
  animation: popIn 0.3s ease both;
}
@keyframes popIn {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.market-context {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px dashed var(--line);
}
.market-context h3 { font-size: 18px; margin-top: 4px; }
.market-base strong {
  display: block;
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 500;
}
.market-base strong small { font-size: 16px; font-weight: 400; }
.market-base span, .market-context > div:last-child > span {
  font-size: 13px;
  color: var(--ink-muted);
}
.market-context > div:last-child > strong {
  display: block;
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 500;
  color: var(--green);
}
.market-context > div:last-child > small {
  font-size: 12px;
  color: var(--ink-muted);
}
.assumption-note {
  font-size: 13px;
  color: var(--ink-muted);
  margin-top: 8px;
}
.market-details {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-muted);
}
.market-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--green);
}
.simple-market-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding: 24px 0;
}
.simple-market-controls label {
  font-size: 13.5px;
  color: var(--ink-secondary);
}
.simple-market-controls output {
  float: right;
  font-family: var(--font-num);
  color: var(--green);
  font-weight: 600;
}
input:not([type="range"]) {
  width: 100%;
  display: block;
  margin-top: 8px;
  padding: 10px 14px;
  font-size: 16px;
  color: var(--ink);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  outline: none;
}
input:not([type="range"]):focus {
  border-color: var(--green);
  background: #fff;
}
input[type="range"] {
  width: 100%;
  margin-top: 16px;
  accent-color: var(--green);
}
.scenario-result {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  padding: 18px 24px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
.scenario-result strong {
  font-family: var(--font-num);
  font-size: 28px;
  color: var(--green);
}
.scenario-result small { font-size: 14px; color: var(--ink-muted); }

/* ========================================================
   05 发展路线图
   ======================================================== */
.roadmap {
  background: #f7f7f4;
  border-top: 1px solid var(--line);
}
.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  padding-top: 36px;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 0;
  right: 0;
  border-top: 2px dashed #cfd5cc;
}
.timeline li {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.timeline li::before {
  content: "";
  position: absolute;
  top: -30px;
  left: 28px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px var(--green-light);
}
.timeline li:nth-child(2)::before {
  background: #2ea574;
}
.timeline li:nth-child(3)::before {
  background: var(--amber);
  box-shadow: 0 0 0 6px var(--amber-light);
}
.when {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 500;
  color: var(--green);
  display: block;
  margin-bottom: 6px;
}
.timeline h3 { font-size: 20px; margin-bottom: 10px; }
.timeline p { font-size: 14px; color: var(--ink-muted); line-height: 1.65; }

/* ========================================================
   06 投资人关心与壁垒
   ======================================================== */
.advantage {
  background: #fff;
  border-top: 1px solid var(--line);
}
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.value {
  padding: 30px;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
}
.value:nth-child(even) {
  border-top-color: var(--amber);
}
.value h3 { font-size: 19px; margin-bottom: 10px; }
.value p { font-size: 14.5px; color: var(--ink-muted); line-height: 1.7; }

.industry-expansion {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}
.expansion-header h3 { font-size: 24px; margin-bottom: 8px; }
.expansion-intro { font-size: 15px; color: var(--ink-muted); margin-bottom: 24px; }
.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.three article {
  padding: 24px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.small-label {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-light);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}
.three h3 { font-size: 17px; margin-bottom: 8px; }
.three p { font-size: 13.5px; color: var(--ink-muted); line-height: 1.65; }
.section-note {
  font-size: 13px;
  color: var(--ink-muted);
  margin-top: 18px;
}

/* ========================================================
   07 合作联系
   ======================================================== */
.closing {
  background: radial-gradient(680px 360px at 50% 0%, rgba(10, 135, 84, 0.12), transparent 70%), var(--bg-page);
  text-align: center;
  border-top: 1px solid var(--line);
  padding: 110px 0;
}
.closing h2 { font-size: clamp(34px, 4vw, 54px); }
.closing-desc {
  font-size: 17px;
  color: var(--ink-muted);
  max-width: 620px;
  margin: 16px auto 36px;
}
.contact-card {
  max-width: 540px;
  margin: 0 auto 36px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.contact-person {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}
.person-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}
.contact-person strong { display: block; font-size: 17px; }
.contact-person span { font-size: 13px; color: var(--ink-muted); }
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--ink-secondary);
  transition: color 0.2s;
}
.contact-item:hover { color: var(--green); }
.closing .actions { justify-content: center; }

/* 页脚 Footer */
footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 48px 0 36px;
  font-size: 13px;
  color: var(--ink-muted);
}
.footer-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 48px;
}
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.footer-top p { font-size: 14px; color: var(--ink-muted); }
.foot-notes {
  margin-bottom: 24px;
  line-height: 1.7;
}
.foot-notes summary {
  cursor: pointer;
  color: var(--green);
  font-weight: 600;
  margin-bottom: 8px;
}
.foot-notes p { max-width: 1000px; margin: 6px 0; }
.foot-notes a { text-decoration: underline; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
}



/* 滚动显现微动效 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================
   移动端与响应式适配
   ======================================================== */
@media (max-width: 1100px) {
  .header-inner, .section-container, .footer-container { padding: 0 28px; }
  .hero-content {
    width: min(640px, 75%);
    margin-left: 28px;
  }
  .feature-showcase {
    grid-template-columns: minmax(0, 1fr) 330px minmax(0, 1fr);
    gap: 20px;
  }
  .model-grid { grid-template-columns: 1fr; }
  .market-context { grid-template-columns: 1fr 1fr; }
  .market-context > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  header { height: 64px; }
  header nav { display: none; }
  .header-inner { padding: 0 20px; }
  .section-container, .footer-container { padding: 0 20px; }
  .section { padding: 64px 0; }

  /* 首屏移动端优化 */
  .hero { min-height: 560px; }
  .hero-car-img { object-position: 85% center; opacity: 0.35; }
  .hero-scrim {
    background: linear-gradient(180deg, rgba(251, 251, 249, 0.92) 0%, rgba(251, 251, 249, 0.98) 100%);
  }
  .hero-content {
    width: 100%;
    margin-left: 0;
    padding: 48px 20px;
  }
  .hero h1 { font-size: 38px; }
  .hero-copy { font-size: 16px; }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 32px;
  }
  .hero-stats > div {
    padding: 0 0 16px;
    border-left: none;
    border-bottom: 1px solid var(--line);
  }
  .hero-stats > div:last-child { border-bottom: none; }

  /* 演示区移动端 */
  .feature-showcase {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .phone-center { order: 1; width: 100%; }
  .feature-column {
    order: 0;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .feature-card {
    padding: 12px 8px;
    min-height: 50px;
  }
  .feature-card p { display: none; }
  .feature-card strong { font-size: 13px; margin: 0; }
  .phone-device { width: min(340px, 100%); }

  /* 商业、路线与问答响应式 */
  .industry-stats, .workflow-steps, .simple-market-results, .simple-market-controls, .timeline, .faq-grid, .three {
    grid-template-columns: 1fr;
  }
  .timeline { padding-top: 0; padding-left: 28px; gap: 24px; }
  .timeline::before {
    top: 0;
    bottom: 0;
    left: 7px;
    right: auto;
    border-top: none;
    border-left: 2px dashed #cfd5cc;
  }
  .timeline li::before {
    top: 24px;
    left: -28px;
  }
  .contact-card {
    flex-direction: column;
    text-align: center;
    padding: 24px;
  }
  .contact-person { flex-direction: column; text-align: center; }
  .footer-top, .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: left;
  }

}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}