/* ==========================================================================
   怀言科技官网 v3.0 — 深色科技感风格
   OpenAI / Anthropic 风格深色基调 + 高对比度科技蓝 + 左侧目录导航
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS 变量 — 深色科技色彩系统
   -------------------------------------------------------------------------- */

:root {
  /* 深色背景层级 */
  --bg-primary: #0A0E27;
  --bg-secondary: #0F1B3D;
  --bg-tertiary: #1A1F3A;

  /* 文字 */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  /* 科技蓝/青 */
  --tech-blue: #60A5FA;
  --tech-cyan: #38BDF8;
  --grad-tech: linear-gradient(135deg, #3B5BDB 0%, #38BDF8 100%);

  /* 怀言品牌色（深底亮版） */
  --hy-indigo: #3B5BDB;
  --hy-indigo-deep: #0F1F4C;
  --hy-blue: #3B5BDB;
  --hy-amber: #F59E0B;
  --hy-gold: #FBBF24;
  --hy-coral: #FB923C;
  --hy-orange: #F97316;

  /* 风险等级色 */
  --hy-green: #10B981;
  --hy-yellow: #F59E0B;
  --hy-orange-red: #EF4444;
  --hy-deep-red: #991B1B;

  /* 中性色（兼容旧变量名） */
  --hy-text-primary: #F8FAFC;
  --hy-text-secondary: #94A3B8;
  --hy-text-muted: #64748B;
  --hy-border: rgba(255, 255, 255, 0.08);
  --hy-border-light: rgba(255, 255, 255, 0.05);
  --hy-cloud: #0F1B3D;
  --hy-white: #F8FAFC;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #3B5BDB 0%, #38BDF8 100%);
  --grad-hero: radial-gradient(circle at 30% 30%, #1A1F3A 0%, #0A0E27 80%);
  --grad-warm: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);
  --grad-warm-deep: linear-gradient(135deg, #F59E0B 0%, #F97316 100%);
  --grad-indigo-soft: linear-gradient(135deg, rgba(96, 165, 250, 0.08), rgba(56, 189, 248, 0.04));
  --grad-amber-soft: linear-gradient(135deg, rgba(251, 191, 36, 0.10), rgba(245, 158, 11, 0.06));

  /* 字体 */
  --font-sans: "PingFang SC", "Source Han Sans CN", "Noto Sans SC", "Microsoft YaHei",
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* 圆角 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 20px;
  --r-xl: 28px;

  /* 阴影 */
  --shadow-glow: 0 0 30px rgba(96, 165, 250, 0.25);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 56px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 28px 72px rgba(0, 0, 0, 0.45);
  --shadow-amber: 0 8px 28px rgba(245, 158, 11, 0.35);
  --shadow-amber-lg: 0 14px 40px rgba(245, 158, 11, 0.40);

  /* 玻璃态（深色版） */
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-dark: rgba(15, 27, 61, 0.60);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(20px);

  /* 间距 */
  --section-py: 120px;
  --section-py-mobile: 80px;
  --container-max: 1280px;

  /* 导航 */
  --nav-h: 72px;

  /* 过渡 */
  --t-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --t-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. 基础重置
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  background-image:
    linear-gradient(rgba(96, 165, 250, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--tech-blue);
  text-decoration: none;
  transition: color var(--t-fast);
}

a:hover {
  color: var(--tech-cyan);
}

ul,
ol {
  list-style: none;
}

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

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

::selection {
  background: rgba(96, 165, 250, 0.25);
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   3. 排版
   -------------------------------------------------------------------------- */

h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

h3 {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
}

h4 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

h5 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}

p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tech-blue);
  margin-bottom: 16px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--grad-tech);
  border-radius: 2px;
}

.eyebrow.center {
  justify-content: center;
}

.text-center { text-align: center; }
.text-white { color: var(--text-primary) !important; }
.text-amber { color: var(--hy-amber) !important; }
.text-blue { color: var(--tech-blue) !important; }
.text-muted { color: var(--text-muted) !important; }

.highlight {
  background: linear-gradient(120deg, transparent 0%, rgba(96, 165, 250, 0.15) 50%, transparent 100%);
  padding: 0 4px;
}

/* --------------------------------------------------------------------------
   4. 布局容器
   -------------------------------------------------------------------------- */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: var(--section-py) 0;
  position: relative;
}

.section-tight {
  padding: 80px 0;
}

.section-dark {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.section-cloud {
  background: var(--bg-secondary);
}

/* 区块标题 */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}

.section-header h2 {
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-secondary);
}

.section-header.on-dark h2 {
  color: var(--text-primary);
}

.section-header.on-dark p {
  color: rgba(248, 250, 252, 0.70);
}

/* 区块底部 CTA */
.section-footer-cta {
  text-align: center;
  margin-top: 56px;
}

/* --------------------------------------------------------------------------
   5. 滚动进度条
   -------------------------------------------------------------------------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #3B5BDB, #38BDF8);
  z-index: 9999;
  transition: width 0.1s linear;
  border-radius: 0 3px 3px 0;
}

/* --------------------------------------------------------------------------
   6. 导航栏
   -------------------------------------------------------------------------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: transparent;
  transition: background var(--t-base), box-shadow var(--t-base), backdrop-filter var(--t-base), border-color var(--t-base);
  border-bottom: 1px solid transparent;
}

/* 透明状态（Hero 上方） */
.navbar.transparent {
  background: transparent;
  border-bottom: 1px solid transparent;
}

/* 滚动后深色玻璃状态 */
.navbar.solid {
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-inner {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo img {
  width: 38px;
  height: 38px;
  transition: transform var(--t-base);
}

.nav-logo:hover img {
  transform: rotate(15deg) scale(1.05);
}

.nav-logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: color var(--t-fast);
}

.navbar.transparent .nav-logo-text {
  color: var(--text-primary);
}

.navbar.solid .nav-logo-text {
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 10px 18px;
  transition: color var(--t-fast);
}

.navbar.transparent .nav-link {
  color: rgba(248, 250, 252, 0.85);
}

.navbar.solid .nav-link {
  color: var(--text-primary);
}

.navbar.transparent .nav-link:hover,
.navbar.solid .nav-link:hover,
.navbar.solid .nav-link.active {
  color: var(--tech-blue);
}

.navbar.transparent .nav-link.active {
  color: var(--tech-cyan);
}

/* 悬浮下划线动效 — 从左到右展开 */
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-tech);
  transition: width var(--t-base);
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: var(--grad-tech);
  color: var(--text-primary) !important;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--r-sm);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  margin-left: 12px;
  box-shadow: 0 4px 20px rgba(96, 165, 250, 0.3);
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(96, 165, 250, 0.5);
  color: var(--text-primary);
}

/* 汉堡菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--t-base);
  margin: 0 auto;
}

.navbar.solid .nav-toggle span {
  background: var(--text-primary);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--text-primary);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. 按钮
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--r-sm);
  border: none;
  cursor: pointer;
  transition: all var(--t-fast);
  text-decoration: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-tech);
  color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(96, 165, 250, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(96, 165, 250, 0.5);
  color: var(--text-primary);
}

.btn-outline-white {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255, 255, 255, 0.30);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--tech-blue);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-outline-indigo {
  background: transparent;
  color: var(--tech-blue);
  border: 1.5px solid var(--tech-blue);
}

.btn-outline-indigo:hover {
  background: rgba(96, 165, 250, 0.10);
  color: var(--tech-cyan);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(96, 165, 250, 0.08);
  color: var(--tech-blue);
}

.btn-ghost:hover {
  background: rgba(96, 165, 250, 0.14);
  color: var(--tech-cyan);
}

.btn-warm {
  background: var(--grad-warm);
  color: var(--text-primary);
  box-shadow: var(--shadow-amber);
}

.btn-warm:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-amber-lg);
  color: var(--text-primary);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 17px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

.btn-arrow::after {
  content: "→";
  margin-left: 2px;
  transition: transform var(--t-fast);
}

.btn-arrow:hover::after {
  transform: translateX(4px);
}

/* 文字链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--tech-blue);
  transition: gap var(--t-fast), color var(--t-fast);
}

.link-arrow::after {
  content: "→";
  transition: transform var(--t-fast);
}

.link-arrow:hover {
  gap: 8px;
  color: var(--tech-cyan);
}

.link-arrow:hover::after {
  transform: translateX(2px);
}

/* --------------------------------------------------------------------------
   8. 左侧目录导航（首页专用）
   -------------------------------------------------------------------------- */

.side-nav {
  position: fixed;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
}

.side-nav-track {
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.side-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.side-nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
  transition: all 0.3s ease;
  position: relative;
}

.side-nav-item .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: 2px solid transparent;
  transition: all 0.3s ease;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.side-nav-item .label {
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.side-nav-item:hover .label,
.side-nav-item.active .label {
  opacity: 1;
  transform: translateX(0);
}

.side-nav-item:hover { color: #F8FAFC; }
.side-nav-item:hover .dot { background: #60A5FA; }
.side-nav-item.active { color: #60A5FA; }
.side-nav-item.active .dot {
  background: #60A5FA;
  box-shadow: 0 0 12px #60A5FA, 0 0 24px rgba(96, 165, 250, 0.4);
  transform: scale(1.3);
  border-color: rgba(96, 165, 250, 0.3);
}

/* --------------------------------------------------------------------------
   9. Hero 区
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(circle at 30% 30%, #1A1F3A 0%, #0A0E27 80%);
  color: var(--text-primary);
  padding: 120px 32px 80px;
  overflow: hidden;
}

/* 网格粒子背景 */
.hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(96, 165, 250, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
}

.hero-glow-1 {
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.15) 0%, transparent 65%);
  pointer-events: none;
}

.hero-glow-2 {
  position: absolute;
  bottom: -15%;
  left: -8%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.10) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero-logo {
  width: 200px;
  height: 200px;
  margin: 0 auto 40px;
  position: relative;
  animation: heroLogoGlow 3s ease-in-out infinite alternate;
}

.hero-logo img {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.50));
}

@keyframes heroLogoGlow {
  0% {
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.40));
    transform: scale(1);
  }
  100% {
    filter: drop-shadow(0 0 50px rgba(56, 189, 248, 0.50));
    transform: scale(1.03);
  }
}

.hero h1 {
  font-size: 60px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero-subtitle {
  font-size: 22px;
  color: rgba(248, 250, 252, 0.80);
  margin-bottom: 12px;
  font-weight: 400;
  line-height: 1.5;
}

.hero-en {
  display: block;
  font-size: 15px;
  color: rgba(248, 250, 252, 0.45);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* Hero 底部数据预告条 */
.hero-stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat-item {
  text-align: center;
}

.hero-stat-item .hs-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--tech-cyan);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat-item .hs-label {
  font-size: 14px;
  color: rgba(248, 250, 252, 0.60);
}

/* --------------------------------------------------------------------------
   10. 智能体矩阵（区块 2）
   -------------------------------------------------------------------------- */

.agent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.agent-card {
  position: relative;
  padding: 40px 32px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.agent-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.agent-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  background: rgba(96, 165, 250, 0.06);
}

.agent-card:hover::before {
  opacity: 1;
}

.agent-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--r-md);
  background: rgba(96, 165, 250, 0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 24px;
  transition: transform var(--t-base), background var(--t-base);
}

.agent-card:hover .agent-icon {
  transform: scale(1.1) rotate(-5deg);
  background: var(--grad-tech);
}

.agent-card:hover .agent-icon .emoji {
  filter: brightness(0) invert(1);
}

.agent-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.agent-name-en {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.agent-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   11. 解决方案矩阵（区块 3）
   -------------------------------------------------------------------------- */

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution-card {
  position: relative;
  padding: 40px 32px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.solution-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  background: rgba(96, 165, 250, 0.06);
}

.solution-card:hover::before {
  opacity: 1;
}

.solution-num {
  font-size: 48px;
  font-weight: 800;
  background: var(--grad-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 20px;
  opacity: 0.90;
}

.solution-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.solution-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  background: rgba(96, 165, 250, 0.10);
  color: var(--tech-blue);
}

.solution-tag.warm {
  background: rgba(245, 158, 11, 0.10);
  color: var(--hy-amber);
}

.solution-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   12. 产品工厂（区块 4）
   -------------------------------------------------------------------------- */

.product-factory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-factory-card {
  padding: 36px 28px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.product-factory-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.product-factory-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  background: rgba(96, 165, 250, 0.06);
}

.product-factory-card:hover::before {
  opacity: 1;
}

.pf-logo {
  width: 72px;
  height: 72px;
  border-radius: var(--r-md);
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--text-primary);
  font-weight: 700;
}

.pf-logo.g1 { background: linear-gradient(135deg, #3B5BDB, #38BDF8); }
.pf-logo.g2 { background: linear-gradient(135deg, #FBBF24, #F59E0B); }
.pf-logo.g3 { background: linear-gradient(135deg, #10B981, #059669); }
.pf-logo.g4 { background: linear-gradient(135deg, #818CF8, #6366F1); }

.pf-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pf-name-en {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.pf-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   13. 平台支撑（区块 5）
   -------------------------------------------------------------------------- */

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-card {
  padding: 40px 32px;
  border-radius: var(--r-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.platform-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  background: rgba(96, 165, 250, 0.06);
}

.platform-card:hover::before {
  opacity: 1;
}

.platform-num {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--hy-amber);
  margin-bottom: 16px;
}

.platform-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.platform-list {
  margin-bottom: 24px;
}

.platform-list li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 8px;
}

.platform-list li:last-child {
  border-bottom: none;
}

.platform-list li::before {
  content: "▸";
  color: var(--tech-blue);
  font-size: 12px;
}

.platform-viz {
  aspect-ratio: 16 / 10;
  background: rgba(96, 165, 250, 0.06);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   14. 数据实力条 + 客户案例（区块 6）
   -------------------------------------------------------------------------- */

.stats-power {
  background: var(--bg-secondary);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.stats-power::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.10) 0%, transparent 65%);
  pointer-events: none;
}

.stats-power-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}

.stat-power-card {
  text-align: center;
  padding: 32px 16px;
}

.stat-power-number {
  font-size: 56px;
  font-weight: 800;
  background: var(--grad-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-power-suffix {
  font-size: 28px;
  font-weight: 700;
  color: var(--tech-cyan);
}

.stat-power-label {
  font-size: 16px;
  color: rgba(248, 250, 252, 0.70);
  font-weight: 500;
}

/* 客户案例切换 */
.case-section {
  margin-top: 80px;
  position: relative;
  z-index: 2;
}

.case-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.case-tab {
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(248, 250, 252, 0.60);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all var(--t-fast);
}

.case-tab:hover {
  color: var(--text-primary);
  border-color: rgba(96, 165, 250, 0.40);
}

.case-tab.active {
  background: var(--grad-tech);
  color: var(--text-primary);
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(96, 165, 250, 0.3);
}

.case-content {
  display: none;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--r-lg);
  padding: 48px;
}

.case-content.active {
  display: block;
  animation: caseFadeIn 0.4s ease;
}

@keyframes caseFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.case-content h3 {
  color: var(--text-primary);
  margin-bottom: 12px;
}

.case-content .case-org {
  font-size: 14px;
  color: var(--tech-cyan);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.case-content p {
  color: rgba(248, 250, 252, 0.75);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
}

.case-metrics {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.case-metric .cm-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--tech-cyan);
  margin-bottom: 4px;
}

.case-metric .cm-label {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.55);
}

/* --------------------------------------------------------------------------
   15. 最新动态（区块 7）
   -------------------------------------------------------------------------- */

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  padding: 36px 32px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.news-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.news-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  background: rgba(96, 165, 250, 0.06);
}

.news-card:hover::before {
  opacity: 1;
}

.news-date {
  font-size: 13px;
  font-weight: 600;
  color: var(--tech-blue);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   16. FAQ 折叠（区块 8）
   -------------------------------------------------------------------------- */

.faq-section {
  background: var(--bg-secondary);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--t-base), border-color var(--t-base);
}

.faq-item:hover {
  border-color: rgba(96, 165, 250, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--t-fast);
  width: 100%;
  text-align: left;
}

.faq-question:hover {
  color: var(--tech-blue);
}

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(96, 165, 250, 0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--tech-blue);
  flex-shrink: 0;
  margin-left: 16px;
  transition: transform var(--t-base), background var(--t-base);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--grad-tech);
  color: var(--text-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-base), padding var(--t-base);
  padding: 0 32px;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 32px 24px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   17. CTA 横幅区
   -------------------------------------------------------------------------- */

.cta-banner {
  background: var(--grad-tech);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 65%);
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--text-primary);
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: rgba(248, 250, 252, 0.90);
  font-size: 18px;
  margin-bottom: 36px;
  position: relative;
  z-index: 2;
}

.cta-banner .btn {
  background: var(--bg-primary);
  color: var(--text-primary);
  position: relative;
  z-index: 2;
}

.cta-banner .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.40);
}

/* --------------------------------------------------------------------------
   18. 页脚
   -------------------------------------------------------------------------- */

.footer {
  background: var(--bg-secondary);
  color: rgba(248, 250, 252, 0.65);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-brand img {
  width: 40px;
  height: 40px;
}

.footer-brand span {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(248, 250, 252, 0.50);
  max-width: 320px;
  margin-bottom: 24px;
}

.footer-en {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.35);
  letter-spacing: 0.1em;
}

.footer-col h5 {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 14px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(248, 250, 252, 0.50);
  transition: color var(--t-fast);
}

.footer-col ul li a:hover {
  color: var(--tech-blue);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(248, 250, 252, 0.35);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: rgba(248, 250, 252, 0.55);
  transition: all var(--t-fast);
}

.footer-social a:hover {
  background: var(--grad-tech);
  color: var(--text-primary);
  transform: translateY(-3px);
}

/* --------------------------------------------------------------------------
   19. 子页面 Hero
   -------------------------------------------------------------------------- */

.page-hero {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(circle at 30% 30%, #1A1F3A 0%, #0A0E27 80%);
  color: var(--text-primary);
  padding: 160px 32px 80px;
  overflow: hidden;
}

.page-hero .hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(96, 165, 250, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.page-hero h1 {
  font-size: 48px;
  color: var(--text-primary);
  margin-bottom: 20px;
  font-weight: 700;
}

.page-hero .page-hero-sub {
  font-size: 20px;
  color: rgba(248, 250, 252, 0.75);
  margin-bottom: 12px;
}

.page-hero .page-hero-en {
  font-size: 14px;
  color: rgba(248, 250, 252, 0.40);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   20. 通用卡片网格
   -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  gap: 24px;
}

.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  padding: 40px 32px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
  background: rgba(96, 165, 250, 0.10);
}

.card-icon.warm {
  background: rgba(245, 158, 11, 0.10);
}

.card h3 {
  color: var(--text-primary);
  margin-bottom: 12px;
}

.card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   21. 技术页 — 架构图
   -------------------------------------------------------------------------- */

.arch-flow {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.arch-layer {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  align-items: stretch;
}

.arch-layer-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  border-radius: var(--r-md);
  text-align: center;
  color: var(--text-primary);
}

.arch-layer-label.perception {
  background: linear-gradient(135deg, #10B981, #059669);
}

.arch-layer-label.algorithm {
  background: var(--grad-tech);
}

.arch-layer-label.application {
  background: var(--grad-warm);
}

.arch-layer-label .al-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.arch-layer-label .al-name {
  font-size: 18px;
  font-weight: 700;
}

.arch-layer-label .al-en {
  font-size: 12px;
  opacity: 0.70;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

.arch-layer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.arch-module {
  padding: 24px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--t-fast);
}

.arch-module:hover {
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
  background: rgba(96, 165, 250, 0.05);
}

.arch-module .am-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.arch-module .am-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 架构连线 */
.arch-connector {
  text-align: center;
  font-size: 28px;
  color: var(--text-muted);
  margin: -16px 0;
}

/* --------------------------------------------------------------------------
   22. AU 列表
   -------------------------------------------------------------------------- */

.au-section {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.au-group h3 {
  text-align: center;
  margin-bottom: 24px;
}

.au-group.positive h3 { color: var(--hy-orange-red); }
.au-group.protective h3 { color: var(--hy-green); }

.au-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.au-chip {
  padding: 16px 24px;
  border-radius: var(--r-sm);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  transition: transform var(--t-fast);
}

.au-chip:hover {
  transform: translateY(-4px);
}

.au-chip.positive {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.au-chip.protective {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.au-chip .au-code {
  font-size: 18px;
  font-weight: 800;
}

.au-chip.positive .au-code { color: var(--hy-orange-red); }
.au-chip.protective .au-code { color: var(--hy-green); }

.au-chip .au-name {
  font-size: 14px;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   23. 科研合作卡片
   -------------------------------------------------------------------------- */

.research-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.research-card {
  padding: 36px 28px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 4px solid var(--tech-blue);
  transition: all var(--t-base);
}

.research-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
  border-left-color: var(--tech-cyan);
  background: rgba(96, 165, 250, 0.05);
}

.research-card .research-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.research-card .research-org {
  font-size: 14px;
  color: var(--tech-blue);
  margin-bottom: 14px;
}

.research-card .research-topic {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   24. 关于页 — 品牌故事 / 价值观 / 使命愿景
   -------------------------------------------------------------------------- */

.brand-story {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.story-character {
  font-size: 128px;
  font-weight: 800;
  background: var(--grad-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 24px;
}

.brand-story h2 {
  color: var(--text-primary);
  margin-bottom: 32px;
}

.brand-story p {
  font-size: 17px;
  line-height: 2;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* 价值观 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  padding: 48px 32px;
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.value-card:hover {
  transform: translateY(-8px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.value-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 28px;
  border-radius: 50%;
  background: var(--grad-tech);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  transition: transform var(--t-base);
}

.value-card:hover .value-icon {
  transform: scale(1.1);
}

.value-zh {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.value-en {
  font-size: 13px;
  color: var(--tech-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.value-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* 使命愿景 */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.mv-card {
  padding: 56px 44px;
  border-radius: var(--r-xl);
  position: relative;
  overflow: hidden;
}

.mv-card.mission {
  background: var(--grad-tech);
  color: var(--text-primary);
}

.mv-card.vision {
  background: var(--grad-warm);
  color: var(--text-primary);
}

.mv-card .mv-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.70;
  margin-bottom: 16px;
}

.mv-card .mv-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
}

.mv-card .mv-text {
  font-size: 16px;
  line-height: 1.9;
  opacity: 0.90;
}

/* 创始人 */
.founder-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 56px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-xl);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
}

.founder-avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--grad-tech);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  color: var(--text-primary);
  font-weight: 700;
}

.founder-info .founder-name {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.founder-info .founder-role {
  font-size: 16px;
  color: var(--tech-blue);
  font-weight: 600;
  margin-bottom: 20px;
}

.founder-info p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* 招聘 CTA */
.careers-cta {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-xl);
  padding: 72px 48px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.careers-cta h2 {
  color: var(--text-primary);
  margin-bottom: 16px;
}

.careers-cta p {
  font-size: 17px;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   25. 联系页 — 表单 / 联系卡片
   -------------------------------------------------------------------------- */

.contact-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.contact-card {
  padding: 40px 28px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  border-top: 4px solid var(--tech-blue);
  transition: all var(--t-base);
  text-align: center;
}

.contact-card.warm { border-top-color: var(--hy-amber); }
.contact-card.green { border-top-color: var(--hy-green); }
.contact-card.coral { border-top-color: var(--hy-coral); }

.contact-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-6px);
  border-color: rgba(96, 165, 250, 0.3);
}

.contact-card .contact-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.contact-card h4 {
  color: var(--text-primary);
  margin-bottom: 10px;
}

.contact-card .contact-detail {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 4px 0;
}

.contact-card .contact-detail a {
  font-weight: 600;
  color: var(--tech-blue);
}

/* 表单 */
.form-wrapper {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.form-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.form-group {
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-label .required {
  color: var(--hy-orange-red);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  border: 2px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--tech-blue);
  box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--hy-orange-red);
}

.form-error {
  font-size: 13px;
  color: var(--hy-orange-red);
  margin-top: 6px;
  display: none;
}

.form-error.show {
  display: block;
}

.form-file {
  width: 100%;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.form-file-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* 联系信息侧栏 */
.contact-info-side {
  padding: 44px 36px;
  background: var(--grad-tech);
  border-radius: var(--r-lg);
  color: var(--text-primary);
}

.contact-info-side h3 {
  color: var(--text-primary);
  margin-bottom: 28px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.info-item .info-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.info-item .info-label {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.60);
  margin-bottom: 2px;
}

.info-item .info-value {
  font-size: 15px;
  color: var(--text-primary);
}

/* 地图占位 */
.map-placeholder {
  aspect-ratio: 21 / 9;
  background: rgba(255, 255, 255, 0.03);
  border: 2px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
}

.map-placeholder .map-icon {
  font-size: 64px;
}

.map-placeholder .map-label {
  font-size: 18px;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   26. 产品页 — 功能对比表 / 试用入口
   -------------------------------------------------------------------------- */

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.spec-table th,
.spec-table td {
  padding: 18px 28px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-table th {
  background: rgba(96, 165, 250, 0.06);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 15px;
  width: 220px;
}

.spec-table td {
  font-size: 15px;
  color: var(--text-secondary);
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background: rgba(96, 165, 250, 0.04);
}

/* 截图占位 */
.screenshot-placeholder {
  aspect-ratio: 16 / 9;
  background: rgba(255, 255, 255, 0.03);
  border: 2px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
}

/* 试用入口 */
.trial-box {
  background: var(--grad-hero);
  border-radius: var(--r-xl);
  padding: 72px 48px;
  text-align: center;
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.trial-box::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.15) 0%, transparent 65%);
  pointer-events: none;
}

.trial-box h2 {
  color: var(--text-primary);
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.trial-box .trial-sub {
  color: rgba(248, 250, 252, 0.75);
  margin-bottom: 48px;
  position: relative;
  z-index: 2;
}

.trial-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

.trial-info {
  text-align: left;
}

.trial-info .trial-label {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.45);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.trial-info .trial-account {
  font-size: 20px;
  color: var(--text-primary);
  font-family: "Courier New", monospace;
  font-weight: 600;
  margin-bottom: 24px;
}

.qr-placeholder {
  width: 180px;
  height: 180px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.qr-placeholder .qr-icon {
  font-size: 56px;
}

/* 功能矩阵 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 36px 28px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--r-md);
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}

.feature-card:hover {
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-6px);
}

.feature-card .feature-icon {
  font-size: 40px;
  margin-bottom: 18px;
}

.feature-card h4 {
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   27. 代码展示卡
   -------------------------------------------------------------------------- */

.code-block {
  background: #0D1117;
  border: 1px solid rgba(96, 165, 250, 0.2);
  border-radius: 12px;
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.code-header {
  background: #161B22;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 16px;
}

.code-dots { display: flex; gap: 6px; }
.code-dots i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.code-dots i:nth-child(1) { background: #FF5F56; }
.code-dots i:nth-child(2) { background: #FFBD2E; }
.code-dots i:nth-child(3) { background: #27C93F; }
.code-filename { color: #94A3B8; font-size: 13px; font-family: monospace; }
.code-block pre { padding: 20px 24px; overflow-x: auto; margin: 0; }
.code-block code {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.7;
  color: #E6EDF3;
}
.kw { color: #C678DD; }
.fn { color: #61AFEF; }
.str { color: #98C379; }
.cmt { color: #5C6370; font-style: italic; }
.num { color: #D19A66; }

/* --------------------------------------------------------------------------
   28. Toast 通知
   -------------------------------------------------------------------------- */

.toast-container {
  position: fixed;
  top: 96px;
  right: 24px;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.toast {
  min-width: 340px;
  max-width: 440px;
  padding: 20px 24px;
  border-radius: var(--r-md);
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 16px;
  pointer-events: auto;
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
  border-left: 4px solid var(--hy-green);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left-width: 4px;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.error {
  border-left-color: var(--hy-orange-red);
}

.toast .toast-icon {
  font-size: 26px;
  flex-shrink: 0;
}

.toast .toast-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.toast .toast-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.toast .toast-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.toast .toast-close:hover {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   29. 滚动动画
   -------------------------------------------------------------------------- */

.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   30. 响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1280px) {
  .container,
  .nav-inner {
    padding: 0 24px;
  }

  .agent-grid,
  .solution-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-factory-grid,
  .platform-grid,
  .stats-power-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 1024px) {
  /* 左侧目录隐藏 */
  .side-nav {
    display: none !important;
  }

  .news-grid,
  .research-grid,
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .arch-layer {
    grid-template-columns: 1fr;
  }

  .arch-layer-label {
    flex-direction: row;
    gap: 16px;
    padding: 24px;
  }

  .arch-layer-content {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-wrapper {
    grid-template-columns: 1fr;
  }

  .founder-card {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 24px;
  }

  .founder-avatar {
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  /* 导航栏移动端 */
  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 0;
    box-shadow: var(--shadow-xl);
    transform: translateY(-150%);
    transition: transform 0.35s ease;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .nav-menu .nav-link {
    padding: 18px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 16px;
    color: var(--text-primary) !important;
  }

  .nav-menu .nav-link::after {
    display: none;
  }

  .nav-menu .nav-cta {
    margin-top: 20px;
    justify-content: center;
    padding: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  /* 导航栏移动端始终深色 */
  .navbar.transparent {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .navbar.transparent .nav-logo-text,
  .navbar.transparent .nav-link {
    color: var(--text-primary);
  }

  /* 标题 */
  h1 { font-size: 38px; }
  h2 { font-size: 30px; }
  h3 { font-size: 22px; }

  .hero h1 { font-size: 42px; }
  .hero-subtitle { font-size: 17px; }
  .hero-logo { width: 140px; height: 140px; }

  .page-hero h1 { font-size: 32px; }
  .page-hero { min-height: 360px; padding: 140px 24px 64px; }

  /* section */
  .section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }
  .section-header h2 { font-size: 28px; }
  .section-header p { font-size: 16px; }

  /* 网格全部变单列 */
  .agent-grid,
  .solution-grid,
  .product-factory-grid,
  .platform-grid,
  .stats-power-grid,
  .news-grid,
  .research-grid,
  .value-grid,
  .contact-card-grid,
  .mv-grid,
  .card-grid-2,
  .card-grid-3,
  .card-grid-4,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  /* Hero stats */
  .hero-stats-bar {
    gap: 24px;
  }

  .hero-stat-item .hs-number {
    font-size: 24px;
  }

  /* stats power */
  .stat-power-number {
    font-size: 42px;
  }

  /* 表单行 */
  .form-row {
    grid-template-columns: 1fr;
  }

  .form-card {
    padding: 36px 24px;
  }

  /* Hero actions */
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  /* 试用 */
  .trial-box {
    padding: 48px 24px;
  }

  .trial-content {
    flex-direction: column;
    gap: 32px;
  }

  .trial-info {
    text-align: center;
  }

  /* 品牌故事 */
  .story-character { font-size: 80px; }

  /* 架构 */
  .arch-layer-content {
    grid-template-columns: 1fr;
  }

  /* 页脚 */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Toast */
  .toast {
    min-width: auto;
    max-width: calc(100vw - 48px);
  }

  .toast-container {
    right: 12px;
    left: 12px;
  }

  /* 容器 */
  .container,
  .nav-inner {
    padding: 0 20px;
  }

  /* 卡片 padding */
  .card,
  .agent-card,
  .solution-card,
  .platform-card,
  .value-card {
    padding: 32px 24px;
  }

  /* spec table */
  .spec-table th,
  .spec-table td {
    padding: 14px 16px;
    font-size: 14px;
  }

  .spec-table th {
    width: 130px;
  }

  /* case content */
  .case-content {
    padding: 32px 24px;
  }

  .case-metrics {
    gap: 24px;
  }

  /* FAQ */
  .faq-question {
    padding: 20px 24px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 24px;
  }

  .faq-item.open .faq-answer {
    padding: 0 24px 20px;
  }

  /* cta banner */
  .cta-banner {
    padding: 56px 0;
  }

  /* 代码块 */
  .code-block pre {
    padding: 16px;
  }

  .code-block code {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 32px; }
  .hero-logo { width: 100px; height: 100px; }
  .hero-stats-bar {
    flex-direction: column;
    gap: 20px;
  }

  .story-character { font-size: 64px; }
  .stat-power-number { font-size: 36px; }

  .founder-card {
    padding: 36px 24px;
  }

  .section { padding: 64px 0; }
  h1 { font-size: 30px; }
  h2 { font-size: 26px; }
}