/* ═══════════════════════════════════════════════════════════
   佳和汽车配件 · Jiahe Auto Parts · B2B 独立站样式表
   参考：守护者V5官网 · 配色：工业深蓝 + 工业橙
   ═══════════════════════════════════════════════════════════ */

/* ── CSS 变量 ── */

/* ═══════════════════════════════════════════════════════════
   佳和汽车配件 · v1.7 世界级 UI 升级 · 2026-08-02
   视觉 + 动效 + 排版
   保留 v1.4.10 萌系机器人 cursor · 5 语言切换 · 7-block GEO
   ═══════════════════════════════════════════════════════════ */

/* ── 增强色彩系统（深色 + 工业橙 + 渐变）── */
:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #0d1321;
  --bg-card: rgba(21, 27, 43, 0.7);
  --bg-card-solid: #151b2b;
  --bg-hover: rgba(28, 36, 56, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border: rgba(42, 52, 71, 0.6);
  --border-light: rgba(61, 74, 97, 0.5);
  --border-glow: rgba(255, 107, 53, 0.3);

  --text-primary: #f0f2f5;
  --text-secondary: #b2b6ca;
  --text-muted: #75798c;
  --text-accent: #ff6b35;

  --accent-orange: #ff6b35;
  --accent-orange-hover: #ff8555;
  --accent-orange-soft: rgba(255, 107, 53, 0.15);
  --accent-blue: #4a90e2;
  --accent-blue-hover: #6aa8f0;
  --accent-blue-soft: rgba(74, 144, 226, 0.15);
  --accent-cyan: #2dd4bf;
  --accent-cyan-soft: rgba(45, 212, 191, 0.15);
  --success: #10b981;
  --success-soft: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;

  /* ── 高级阴影系统 ── */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.45);
  --shadow-xl: 0 32px 96px rgba(0,0,0,0.55);
  --shadow-glow-orange: 0 0 24px rgba(255, 107, 53, 0.25);
  --shadow-glow-blue: 0 0 24px rgba(74, 144, 226, 0.25);
  --shadow-glow-cyan: 0 0 24px rgba(45, 212, 191, 0.25);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.05);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-2xl: 40px;
  --radius-full: 9999px;

  /* ── 排版系统（Typography Hierarchy）── */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* 字号层次（黄金比例 1.25 缩放） */
  --fs-xs: 0.75rem;     /* 12px */
  --fs-sm: 0.875rem;    /* 14px */
  --fs-base: 1rem;      /* 16px */
  --fs-md: 1.125rem;    /* 18px */
  --fs-lg: 1.25rem;     /* 20px */
  --fs-xl: 1.5rem;      /* 24px */
  --fs-2xl: 1.875rem;   /* 30px */
  --fs-3xl: 2.25rem;    /* 36px */
  --fs-4xl: 3rem;       /* 48px */
  --fs-5xl: 3.75rem;    /* 60px */
  --fs-6xl: 4.5rem;     /* 72px */
  --fs-7xl: 5.5rem;     /* 88px */

  /* 行高 */
  --lh-display: 1.05;   /* 大标题 */
  --lh-heading: 1.2;    /* 标题 */
  --lh-body: 1.65;      /* 正文 */
  --lh-caption: 1.4;     /* 注释 */

  /* 字间距 */
  --tracking-display: -0.035em;
  --tracking-heading: -0.02em;
  --tracking-body: 0;
  --tracking-caption: 0.08em;
  --tracking-eyebrow: 0.18em;

  /* 间距系统（8 倍数） */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-8: 3rem;      /* 48px */
  --space-10: 4rem;     /* 64px */
  --space-12: 6rem;     /* 96px */
  --space-16: 8rem;     /* 128px */

  /* 动画曲线 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-base: 400ms;
  --duration-slow: 800ms;
  --duration-slower: 1200ms;

  --max-width: 1240px;
  --header-height: 76px;
}

/* ── 排版基础（Typography Base）── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  letter-spacing: var(--tracking-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--lh-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--text-primary);
  margin: 0;
  font-feature-settings: 'kern', 'liga', 'calt';
}

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, var(--fs-6xl));
  line-height: var(--lh-display);
  letter-spacing: var(--tracking-display);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 3.5vw, var(--fs-4xl));
  letter-spacing: var(--tracking-display);
  font-weight: 700;
}

h3 {
  font-size: var(--fs-2xl);
  font-weight: 600;
}

h4 {
  font-size: var(--fs-xl);
  font-weight: 600;
}

h5 {
  font-size: var(--fs-lg);
  font-weight: 600;
}

p {
  margin: 0 0 var(--space-4);
  line-height: var(--lh-body);
  color: var(--text-secondary);
}

a {
  color: var(--accent-orange);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--accent-orange-hover);
}

/* ── 玻璃拟态（Glassmorphism）── */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-md), var(--shadow-inset);
}

.glass-card {
  background: rgba(21, 27, 43, 0.6);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), var(--shadow-inset);
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-inset);
  border-color: rgba(255, 107, 53, 0.2);
}

/* ── 渐变渐变背景（Gradient Orbs）── */
.hero-bg-orbs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.hero-bg-orbs::before,
.hero-bg-orbs::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: orb-float 12s ease-in-out infinite;
}

.hero-bg-orbs::before {
  width: 500px;
  height: 500px;
  background: var(--accent-orange);
  top: -100px;
  right: -100px;
}

.hero-bg-orbs::after {
  width: 600px;
  height: 600px;
  background: var(--accent-blue);
  bottom: -150px;
  left: -150px;
  animation-delay: 4s;
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(50px, -50px) scale(1.1); }
  66% { transform: translate(-50px, 50px) scale(0.9); }
}

/* ── 滚动进度条（Scroll Progress）── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue), var(--accent-cyan));
  z-index: 9999;
  transition: width 80ms linear;
  box-shadow: 0 0 12px var(--accent-orange);
}

/* ── 滚动入场（Reveal on Scroll）── */
/* 默认可见（JS 失败时 fallback） */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  will-change: opacity, transform;
}

/* JS 启动时会先隐藏，然后 IntersectionObserver 触发 .visible */
.reveal.js-pending {
  opacity: 0;
  transform: translateY(40px);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }

/* ── 数字动画（Counter）── */
[data-counter] {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

/* ── 滚动指示器（Scroll Indicator）── */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ── 增强段落标签（Eyebrow）── */
.eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--accent-orange);
  margin-bottom: var(--space-3);
  position: relative;
  padding-left: var(--space-5);
}

.eyebrow::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: var(--space-3);
  height: 2px;
  background: var(--accent-orange);
}

/* ── 增强按钮（Premium Button）── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--fs-base);
  font-weight: 600;
  letter-spacing: 0.005em;
  line-height: 1;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              background var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 60%);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-orange-hover));
  color: #fff;
  box-shadow: var(--shadow-glow-orange), var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-glow-orange), var(--shadow-md);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-orange);
  color: var(--accent-orange);
  transform: translateY(-2px);
}

:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #0d1321;
  --bg-card: #151b2b;
  --bg-hover: #1c2438;
  --border: #2a3447;
  --border-light: #3d4a61;
  --text-primary: #f0f2f5;
  --text-secondary: #8b95a8;
  --text-muted: #5e6a80;
  --accent-orange: #ff6b35;
  --accent-orange-hover: #ff8555;
  --accent-blue: #4a90e2;
  --accent-blue-hover: #6aa8f0;
  --success: #10b981;
  --warning: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.3);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.4);
  --max-width: 1200px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-orange);
}

ul, ol {
  list-style: none;
}

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

/* ── 字体 ── */
.playfair {
  font-family: 'Playfair Display', Georgia, serif;
}

.mono {
  font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
}

/* ── 容器 ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── 导航 ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 15, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
  background: rgba(10, 15, 26, 0.98);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.2rem;
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-blue));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

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

.lang-switcher {
  position: relative;
  padding-bottom: 8px;
  margin-bottom: -8px;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-current:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 160px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
}

.lang-switcher:hover .lang-dropdown,
.lang-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.lang-option:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.lang-option.active {
  color: var(--accent-orange);
}

.mobile-menu {
  display: none;
}

.mobile-menu-btn {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.5rem;
}

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
  min-height: 46px;
}

.btn-primary {
  background: var(--accent-orange);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  background: var(--accent-orange-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 107, 53, 0.4);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--accent-blue);
  color: var(--text-primary);
}

.btn-ghost {
  padding: 10px 20px;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--accent-orange);
}

/* ── Hero ── */
.hero {
  position: relative;
  padding: 80px 0 60px;
  background: var(--bg-primary);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255,107,53,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(74,144,226,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: 100px;
  color: var(--accent-orange);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .accent {
  color: var(--accent-orange);
  font-style: italic;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 答案胶囊 */
.answer-capsule {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-orange);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 0 auto 24px;
  max-width: 900px;
  max-width: 560px;
}

.answer-capsule p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.answer-capsule strong {
  color: var(--text-primary);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-frame {
  position: relative;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4/3;
  background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-frame img {
  width: 80%;
  height: auto;
  object-fit: contain;
}

.hero-stat-float {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-md);
}

.hero-stat-float.stat-1 {
  top: 20px;
  right: 0;
}

.hero-stat-float.stat-2 {
  bottom: 40px;
  left: -20px;
}

.hero-stat-float .number {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.hero-stat-float .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ── 信任徽章 ── */
.trust-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.trust-item {
  text-align: center;
  padding: 16px;
}

.trust-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.trust-item h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.trust-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ── 通用区块 ── */
.section {
  padding: 80px 0;
  position: relative;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: 100px;
  color: var(--accent-orange);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* ── 产品分类 ── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-icon {
  width: 60px;
  height: 60px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.category-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.category-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.category-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-meta span {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: 100px;
}

/* ── 产品列表 ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.product-image {
  aspect-ratio: 4/3;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.product-image img {
  max-height: 160px;
  width: auto;
  object-fit: contain;
}

.product-info {
  padding: 24px;
}

.product-info h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  line-height: 1.4;
}

.product-oem {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--accent-blue);
  background: rgba(74, 144, 226, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 12px;
}

.product-fit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.product-moq {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── 为什么选我们 ── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
}

.why-number {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--border);
  line-height: 1;
}

.why-card h3 {
  font-size: 1.2rem;
  margin: 16px 0 12px;
  padding-top: 20px;
}

.why-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ── 车型覆盖 ── */
.coverage-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.coverage-tab {
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
}

.coverage-tab:hover,
.coverage-tab.active {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #fff;
}

.coverage-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.coverage-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.coverage-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.coverage-flag {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.coverage-item span {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ── 关于我们 ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-image img {
  width: 90%;
  height: auto;
  object-fit: contain;
}

.about-content h2 {
  font-size: 2.4rem;
  margin-bottom: 24px;
  line-height: 1.2;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.about-stat .number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.about-stat .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── 流程 ── */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: var(--border);
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 16px;
}

.process-step .step-number {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: var(--bg-card);
  border: 2px solid var(--accent-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.process-step h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.process-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ── FAQ ── */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
}

.faq-question:hover {
  color: var(--text-primary);
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--accent-orange);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 24px 24px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── 联系我们 ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h2 {
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.contact-method .icon {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent-orange);
  flex-shrink: 0;
}

.contact-method h4 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.contact-method p {
  font-size: 1rem;
  font-weight: 600;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

/* 全局 focus-visible 视觉反馈（无障碍）*/
*:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
.faq-question:focus-visible,
.coverage-tab:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ── Footer ── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

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

.footer-brand p {
  color: var(--text-secondary);
  margin: 16px 0 24px;
  font-size: 0.95rem;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.footer-social a:hover {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #fff;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── 浮动 CTA ── */
.floating-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
}

.floating-cta .btn {
  box-shadow: var(--shadow-lg);
  padding: 16px 24px;
  border-radius: 100px;
}

/* ── 表格 ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.data-table td {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.data-table tr:hover td {
  background: var(--bg-hover);
}

/* ── 导航交互增强 ── */

/* 滚动后导航栏背景变实 */
.navbar.scrolled {
  background: rgba(10, 15, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* 当前 section 高亮 */
.nav-link.active {
  color: var(--accent-orange);
}

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

/* mobile-menu 关闭按钮状态 */
.mobile-menu-btn[aria-expanded="true"] {
  background: var(--accent-orange);
  color: #fff;
  border-color: var(--accent-orange);
}

/* ── FAQ 折叠动画 ── */
.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-icon {
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* ── 按钮微交互 ── */
.btn {
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px) scale(1.01);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-loader {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── 表单验证样式 ── */
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: #ff4d4d;
  box-shadow: 0 0 0 3px rgba(255, 77, 77, 0.15);
}

.form-error {
  color: #ff4d4d;
  font-size: 0.85rem;
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 20px;
}

.form-error::before {
  content: '⚠';
  font-size: 0.9rem;
}

.form-success {
  background: rgba(39, 174, 96, 0.1);
  border: 1px solid rgba(39, 174, 96, 0.3);
  color: #2ecc71;
  padding: 16px;
  border-radius: var(--radius-md);
  margin-top: 20px;
  text-align: center;
  font-weight: 500;
}

/* ── 滚动 reveal 动画 ── */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 错开动画延迟 */
.product-card:nth-child(1) { transition-delay: 0ms; }
.product-card:nth-child(2) { transition-delay: 80ms; }
.product-card:nth-child(3) { transition-delay: 160ms; }
.product-card:nth-child(4) { transition-delay: 240ms; }
.product-card:nth-child(5) { transition-delay: 320ms; }
.product-card:nth-child(6) { transition-delay: 400ms; }

.why-card:nth-child(1) { transition-delay: 0ms; }
.why-card:nth-child(2) { transition-delay: 100ms; }
.why-card:nth-child(3) { transition-delay: 200ms; }
.why-card:nth-child(4) { transition-delay: 300ms; }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ── 其他微交互 ── */
.product-card:hover,
.why-card:hover,
.knowledge-card:hover,
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.knowledge-card,
.testimonial-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.coverage-tab {
  transition: all 0.2s ease;
}

.coverage-tab:hover:not(.active) {
  background: var(--bg-hover);
  color: var(--text-primary);
}


/* ── 响应式 ── */
@media (max-width: 1024px) {
  /* 1024px 以下：隐藏横向导航，显示汉堡按钮 */
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu {
    display: block;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    height: calc(100vh - var(--nav-height));
    background: var(--bg-primary);
    padding: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
  }
  
  .mobile-menu.active {
    transform: translateX(0) !important;
  }
  
  .mobile-menu .nav-link {
    display: block;
    padding: 16px;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border);
  }
  
  .hero-inner,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .category-grid,
  .product-grid,
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-steps::before {
    display: none;
  }
  
  .coverage-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 80px 0 40px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section {
    padding: 64px 0;
  }
  
  .section-header h2,
  .about-content h2,
  .contact-info h2 {
    font-size: 1.8rem;
  }
  
  .category-grid,
  .product-grid,
  .why-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .process-steps,
  .coverage-list {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .hero-stat-float {
    display: none;
  }
  
  .floating-cta {
    left: 24px;
    right: 24px;
    bottom: 16px;
  }
  
  .floating-cta .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ── 工具类 ── */
.text-accent { color: var(--accent-orange); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.hidden { display: none; }

/* ── v1.2 GEO / Knowledge Center ── */

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

.knowledge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.knowledge-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  border-color: var(--border-light);
}

.knowledge-card:nth-child(4),
.knowledge-card:nth-child(5) {
  grid-column: span 1;
}

.knowledge-meta {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
  margin-bottom: 12px;
}

.knowledge-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.knowledge-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.testimonial-card p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.testimonial-card footer {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.testimonial-card footer strong {
  color: var(--text-primary);
  font-weight: 600;
}

.testimonial-card footer span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-orange);
  font-weight: 600;
  text-decoration: none;
  margin-top: auto;
  transition: gap 0.2s ease;
}

.link-arrow:hover {
  gap: 10px;
  color: var(--accent-orange-hover);
}

@media (max-width: 1024px) {
  .knowledge-grid,
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .knowledge-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
}

/* ── v1.3 mailto 表单辅助样式 ── */

.form-hint {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  margin-bottom: 16px;
  text-align: center;
  line-height: 1.5;
}

.form-alt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
  margin-bottom: 12px;
  text-align: center;
}

.form-alt-buttons {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.form-alt-buttons .btn {
  flex: 1;
  text-align: center;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 12px 16px;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--accent-orange);
  color: var(--text-primary);
}

/* ── v1.3 Contact CTA (replace form) ── */

.contact-cta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
}

.contact-cta h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.contact-cta > p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.cta-btn {
  width: 100%;
  text-decoration: none;
  text-align: center;
  padding: 16px 24px;
  font-size: 1rem;
  font-weight: 600;
}

.cta-whatsapp {
  background: #25d366;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
}

.cta-whatsapp:hover {
  background: #20bd5a;
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4);
}

.cta-info {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  margin-bottom: 24px;
}

.cta-info p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.cta-info strong {
  color: var(--text-primary);
  display: inline-block;
  min-width: 140px;
}

.cta-info a {
  color: var(--accent-orange);
  text-decoration: none;
}

.cta-info a:hover {
  text-decoration: underline;
}

.cta-tip {
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.cta-tip strong {
  color: var(--accent-orange);
}

@media (max-width: 768px) {
  .contact-cta {
    padding: 28px 20px;
  }
  .cta-info strong {
    display: block;
    min-width: 0;
    margin-bottom: 2px;
  }
}

/* ── v1.4 TechCursor — Custom cursor system ── */

.cursor-dot,
.cursor-ring,
.cursor-trail,
.cursor-ripple {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 99999;
  border-radius: 50%;
  will-change: transform;
}

.cursor-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-orange);
  box-shadow: 0 0 8px rgba(255, 107, 53, 0.6);
  z-index: 100001;
  transition: opacity 0.2s ease;
}

.cursor-ring {
  width: 36px;
  height: 36px;
  border: 2px solid rgba(255, 107, 53, 0.4);
  background: transparent;
  z-index: 100000;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.3s ease,
              background 0.3s ease,
              opacity 0.2s ease;
}

.cursor-trail {
  width: 80px;
  height: 80px;
  border: 1px dashed rgba(74, 144, 226, 0.15);
  z-index: 99999;
  animation: cursor-trail-rotate 20s linear infinite;
}

@keyframes cursor-trail-rotate {
  to { transform: rotate(360deg); }
}

/* Hover state — Ring expands and shows label */
.cursor-ring.hovering {
  width: 72px;
  height: 72px;
  background: rgba(255, 107, 53, 0.12);
  border-color: var(--accent-orange);
  border-width: 2px;
}

.cursor-ring.hovering::after {
  content: attr(data-label);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-orange);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
}

/* Click state — Ring contracts */
.cursor-ring.clicking {
  width: 24px;
  height: 24px;
  background: rgba(255, 107, 53, 0.3);
  border-color: var(--accent-orange);
}

/* Click ripple — Expanding ring */
.cursor-ripple {
  width: 0;
  height: 0;
  border: 2px solid var(--accent-orange);
  background: transparent;
  z-index: 99998;
  animation: cursor-ripple-anim 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cursor-ripple-anim {
  0% {
    width: 0;
    height: 0;
    opacity: 1;
    border-width: 2px;
  }
  100% {
    width: 120px;
    height: 120px;
    opacity: 0;
    border-width: 1px;
  }
}

/* Hide default cursor on desktop when custom cursor is active */
.custom-cursor,
.custom-cursor * {
  cursor: none !important;
}

.custom-cursor input,
.custom-cursor textarea,
.custom-cursor select {
  cursor: text !important;
}

/* Hide custom cursor on touch devices */
@media (pointer: coarse) {
  .cursor-dot,
  .cursor-ring,
  .cursor-trail,
  .cursor-ripple {
    display: none !important;
  }
  .custom-cursor,
  .custom-cursor * {
    cursor: auto !important;
  }
}

/* ── Hero parallax ── */
.hero-inner,
.hero-content,
.hero-visual {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Scroll progress bar ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue));
  z-index: 100002;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

/* ── v1.4.1 Robot Cursor ── */

.robot-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  pointer-events: none;
  z-index: 100001;
  opacity: 0;
  transition: opacity 0.2s ease;
  transform-origin: center;
  filter: drop-shadow(0 2px 8px rgba(255, 107, 53, 0.3));
}

.robot-cursor svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Idle 呼吸 + 头部微动 */
.robot-cursor svg {
  animation: robot-breathe 2s ease-in-out infinite;
  transform-origin: center 20px;
}

@keyframes robot-breathe {
  0%, 100% { transform: translateY(0) scaleY(1); }
  50% { transform: translateY(-2px) scaleY(1.02); }
}

/* 移动状态：腿和手臂摆动 */
.robot-cursor.moving svg {
  animation: robot-walk 0.4s ease-in-out infinite;
}

.robot-cursor.moving .robot-arm-left,
.robot-cursor.moving .robot-leg-right {
  animation: robot-swing-a 0.4s ease-in-out infinite;
  transform-origin: top center;
}

.robot-cursor.moving .robot-arm-right,
.robot-cursor.moving .robot-leg-left {
  animation: robot-swing-b 0.4s ease-in-out infinite;
  transform-origin: top center;
}

@keyframes robot-walk {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-3px) rotate(2deg); }
}

@keyframes robot-swing-a {
  0%, 100% { transform: rotate(20deg); }
  50% { transform: rotate(-20deg); }
}

@keyframes robot-swing-b {
  0%, 100% { transform: rotate(-20deg); }
  50% { transform: rotate(20deg); }
}

/* Hover 状态：眼睛变大+变蓝，嘴角上扬，天线发光 */
.robot-cursor.hovering svg {
  animation: robot-excited 0.6s ease-in-out infinite;
}

.robot-cursor.hovering .robot-eye {
  fill: #4a90e2;
  animation: robot-blink 0.8s ease-in-out infinite;
}

.robot-cursor.hovering .robot-mouth {
  height: 2.5px;
  y: 18;
}

.robot-cursor.hovering .robot-antenna-dot {
  fill: #4a90e2;
  animation: robot-antenna-glow 0.5s ease-in-out infinite alternate;
}

@keyframes robot-excited {
  0%, 100% { transform: translateY(0) scale(1.05); }
  50% { transform: translateY(-4px) scale(1.08); }
}

@keyframes robot-blink {
  0%, 90%, 100% { transform: scaleY(1); }
  95% { transform: scaleY(0.1); }
}

@keyframes robot-antenna-glow {
  0% { r: 2.5; opacity: 1; }
  100% { r: 4; opacity: 0.7; }
}

/* Click 状态：蹲下 + 头部冲击 */
.robot-cursor.clicking svg {
  animation: robot-squish 0.3s ease-out;
}

.robot-cursor.clicking .robot-torso {
  transform-origin: center;
  animation: robot-squat 0.3s ease-out;
}

.robot-cursor.clicking .robot-head {
  animation: robot-head-down 0.3s ease-out;
  transform-origin: center;
}

@keyframes robot-squish {
  0% { transform: scale(1); }
  50% { transform: scale(0.85, 1.15); }
  100% { transform: scale(1); }
}

@keyframes robot-squat {
  0% { transform: scaleY(1) translateY(0); }
  50% { transform: scaleY(0.6) translateY(3px); }
  100% { transform: scaleY(1) translateY(0); }
}

@keyframes robot-head-down {
  0% { transform: translateY(0); }
  50% { transform: translateY(3px) scale(1.1, 0.9); }
  100% { transform: translateY(0); }
}

/* 隐藏原 dot/ring/trail */
.cursor-dot,
.cursor-ring,
.cursor-trail {
  display: none !important;
}

.cursor-ripple-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99999;
}

.cursor-ripple {
  position: absolute;
  width: 0;
  height: 0;
  border: 2px solid var(--accent-orange);
  background: transparent;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: cursor-ripple-anim 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cursor-ripple-anim {
  0% {
    width: 0;
    height: 0;
    opacity: 1;
    border-width: 2px;
  }
  100% {
    width: 120px;
    height: 120px;
    opacity: 0;
    border-width: 1px;
  }
}

/* 隐藏默认鼠标 + 移动端不显示机器人 */
.custom-cursor,
.custom-cursor * {
  cursor: none !important;
}

.custom-cursor input,
.custom-cursor textarea,
.custom-cursor select {
  cursor: text !important;
}

@media (pointer: coarse) {
  .robot-cursor,
  .cursor-ripple-container {
    display: none !important;
  }
  .custom-cursor,
  .custom-cursor * {
    cursor: auto !important;
  }
}

/* ── v1.4.2 RobotCursor v2 — 完整状态机 ── */

.robot-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  pointer-events: none;
  z-index: 100001;
  opacity: 0;
  transition: opacity 0.3s ease;
  transform-origin: center;
  filter: drop-shadow(0 2px 8px rgba(255, 107, 53, 0.3));
  will-change: transform;
}

.robot-svg-wrap {
  position: relative;
  width: 100%;
  height: 100%;
}

.robot-cursor svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Zzz 字符（打盹时显示）*/
.robot-zzz {
  position: absolute;
  top: -15px;
  right: -15px;
  font-size: 0;
  color: #4a90e2;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  pointer-events: none;
  opacity: 0;
}

.robot-zzz span {
  display: inline-block;
  font-size: 14px;
  margin-left: -2px;
  opacity: 0;
}

.robot-cursor.sleeping .robot-zzz {
  font-size: 14px;
  opacity: 1;
}

.robot-cursor.sleeping .robot-zzz span:nth-child(1) {
  animation: zzz-1 2s ease-in infinite;
}
.robot-cursor.sleeping .robot-zzz span:nth-child(2) {
  animation: zzz-2 2s ease-in infinite;
}
.robot-cursor.sleeping .robot-zzz span:nth-child(3) {
  animation: zzz-3 2s ease-in infinite;
}

@keyframes zzz-1 {
  0% { opacity: 0; transform: translateY(0); }
  20% { opacity: 1; }
  100% { opacity: 0; transform: translate(-10px, -20px) scale(0.6); }
}
@keyframes zzz-2 {
  0%, 20% { opacity: 0; transform: translateY(0); }
  40% { opacity: 1; }
  100% { opacity: 0; transform: translate(-15px, -25px) scale(0.6); }
}
@keyframes zzz-3 {
  0%, 40% { opacity: 0; transform: translateY(0); }
  60% { opacity: 1; }
  100% { opacity: 0; transform: translate(-20px, -30px) scale(0.6); }
}

/* Idle - 静止呼吸 */
.robot-cursor.idle svg,
.robot-cursor:not(.walking):not(.running):not(.hovering):not(.clicking):not(.sleeping):not(.flying) svg {
  animation: robot-breathe 2s ease-in-out infinite;
  transform-origin: center 20px;
}

@keyframes robot-breathe {
  0%, 100% { transform: translateY(0) scaleY(1); }
  50% { transform: translateY(-2px) scaleY(1.02); }
}

/* Walking - 巡逻走路 */
.robot-cursor.walking svg {
  animation: robot-walk 0.45s ease-in-out infinite;
}

.robot-cursor.walking .robot-arm-left,
.robot-cursor.walking .robot-leg-right {
  animation: robot-swing-a 0.45s ease-in-out infinite;
  transform-origin: top center;
}

.robot-cursor.walking .robot-arm-right,
.robot-cursor.walking .robot-leg-left {
  animation: robot-swing-b 0.45s ease-in-out infinite;
  transform-origin: top center;
}

@keyframes robot-walk {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  50% { transform: translateY(-3px) rotate(3deg); }
}

@keyframes robot-swing-a {
  0%, 100% { transform: rotate(25deg); }
  50% { transform: rotate(-25deg); }
}

@keyframes robot-swing-b {
  0%, 100% { transform: rotate(-25deg); }
  50% { transform: rotate(25deg); }
}

/* Running - 飞奔（更快更强）*/
.robot-cursor.running svg {
  animation: robot-run 0.25s ease-in-out infinite;
}

.robot-cursor.running .robot-arm-left,
.robot-cursor.running .robot-leg-right {
  animation: robot-run-swing-a 0.25s ease-in-out infinite;
  transform-origin: top center;
}

.robot-cursor.running .robot-arm-right,
.robot-cursor.running .robot-leg-left {
  animation: robot-run-swing-b 0.25s ease-in-out infinite;
  transform-origin: top center;
}

.robot-cursor.running .robot-eye {
  /* 紧张表情：眼睛变小 */
  r: 1.5;
}

@keyframes robot-run {
  0%, 100% { transform: translateY(0) rotate(-5deg); }
  50% { transform: translateY(-5px) rotate(5deg); }
}

@keyframes robot-run-swing-a {
  0%, 100% { transform: rotate(40deg); }
  50% { transform: rotate(-40deg); }
}

@keyframes robot-run-swing-b {
  0%, 100% { transform: rotate(-40deg); }
  50% { transform: rotate(40deg); }
}

/* Flying - 滚动飞行模式 */
.robot-cursor.flying svg {
  animation: robot-fly 0.5s ease-in-out infinite;
}

.robot-cursor.flying .robot-arm-left,
.robot-cursor.flying .robot-arm-right {
  animation: robot-fly-arms 0.6s ease-in-out infinite;
  transform-origin: top center;
}

.robot-cursor.flying .robot-leg-left,
.robot-cursor.flying .robot-leg-right {
  animation: robot-fly-legs 0.6s ease-in-out infinite;
  transform-origin: top center;
}

@keyframes robot-fly {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

@keyframes robot-fly-arms {
  0%, 100% { transform: rotate(-30deg); }
  50% { transform: rotate(30deg); }
}

@keyframes robot-fly-legs {
  0%, 100% { transform: rotate(10deg); }
  50% { transform: rotate(-10deg); }
}

/* Sleeping - 打盹 */
.robot-cursor.sleeping svg {
  animation: robot-sleep 3s ease-in-out infinite;
}

.robot-cursor.sleeping .robot-eye {
  height: 0.5px;
  cy: 14;
  animation: none;
}

.robot-cursor.sleeping .robot-mouth {
  height: 2.5px;
  y: 18;
}

@keyframes robot-sleep {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.9; }
  50% { transform: translateY(2px) scale(0.98); opacity: 0.7; }
}

/* Hovering - 兴奋 */
.robot-cursor.hovering svg {
  animation: robot-excited 0.6s ease-in-out infinite;
}

.robot-cursor.hovering .robot-eye {
  fill: #4a90e2;
}

.robot-cursor.hovering .robot-mouth {
  height: 2.5px;
  y: 18;
}

.robot-cursor.hovering .robot-antenna-dot {
  fill: #4a90e2;
  animation: robot-antenna-glow 0.5s ease-in-out infinite alternate;
}

@keyframes robot-excited {
  0%, 100% { transform: translateY(0) scale(1.05); }
  50% { transform: translateY(-4px) scale(1.1); }
}

@keyframes robot-antenna-glow {
  0% { r: 2.5; opacity: 1; }
  100% { r: 4; opacity: 0.6; }
}

/* Clicking - 蹲下+闪光 */
.robot-cursor.clicking svg {
  animation: robot-squish 0.3s ease-out;
  filter: brightness(2);
}

.robot-cursor.clicking .robot-torso {
  animation: robot-squat 0.3s ease-out;
  transform-origin: center;
}

.robot-cursor.clicking .robot-head {
  animation: robot-head-down 0.3s ease-out;
  transform-origin: center;
}

@keyframes robot-squish {
  0% { transform: scale(1); }
  50% { transform: scale(0.8, 1.2); }
  100% { transform: scale(1); }
}

@keyframes robot-squat {
  0% { transform: scaleY(1) translateY(0); }
  50% { transform: scaleY(0.5) translateY(5px); }
  100% { transform: scaleY(1) translateY(0); }
}

@keyframes robot-head-down {
  0% { transform: translateY(0); }
  50% { transform: translateY(4px); }
  100% { transform: translateY(0); }
}

/* Arrived - 到达悬停目标（停在小图标上方）*/
.robot-cursor.arrived svg {
  animation: robot-arrived 1s ease-in-out infinite;
}

@keyframes robot-arrived {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

/* ===== 粒子系统 ===== */
.cursor-particle-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100000;
}

.cursor-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: particle-burst 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes particle-burst {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(0);
    opacity: 0;
  }
}

/* ===== 屏幕震动 ===== */
.screen-shake {
  animation: screen-shake 0.25s ease-out;
}

@keyframes screen-shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, -2px); }
  80% { transform: translate(2px, 1px); }
}


/* ── v1.4.3 RobotCursor v3 — 萌系可爱版 ── */

.robot-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  pointer-events: none;
  z-index: 100001;
  opacity: 0;
  transition: opacity 0.3s ease;
  transform-origin: center;
  filter: drop-shadow(0 2px 6px rgba(255, 107, 53, 0.35));
  will-change: transform;
}

.robot-svg-wrap {
  position: relative;
  width: 100%;
  height: 100%;
}

.robot-cursor svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* 腮红（仅 idle/walking 显示） */
.robot-cursor .robot-blush {
  animation: blush-pulse 3s ease-in-out infinite;
}

@keyframes blush-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.9; }
}

/* Idle 呼吸 */
.robot-cursor.idle svg,
.robot-cursor:not(.walking):not(.running):not(.hovering):not(.clicking):not(.sleeping):not(.flying) svg {
  animation: cute-breathe 1.8s ease-in-out infinite;
}

@keyframes cute-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Walking - 弹跳走路 */
.robot-cursor.walking svg {
  animation: cute-walk 0.4s ease-in-out infinite;
}

.robot-cursor.walking .robot-arm-left {
  animation: cute-swing-a 0.4s ease-in-out infinite;
  transform-origin: 12px 26px;
}
.robot-cursor.walking .robot-arm-right {
  animation: cute-swing-b 0.4s ease-in-out infinite;
  transform-origin: 28px 26px;
}
.robot-cursor.walking .robot-leg-left {
  animation: cute-swing-b 0.4s ease-in-out infinite;
  transform-origin: 17px 35px;
}
.robot-cursor.walking .robot-leg-right {
  animation: cute-swing-a 0.4s ease-in-out infinite;
  transform-origin: 23px 35px;
}

@keyframes cute-walk {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-2px) rotate(4deg); }
}

@keyframes cute-swing-a {
  0%, 100% { transform: rotate(20deg); }
  50% { transform: rotate(-20deg); }
}

@keyframes cute-swing-b {
  0%, 100% { transform: rotate(-20deg); }
  50% { transform: rotate(20deg); }
}

/* Running - 兴奋飞奔 */
.robot-cursor.running svg {
  animation: cute-run 0.3s ease-in-out infinite;
}

.robot-cursor.running .robot-arm-left,
.robot-cursor.running .robot-leg-right {
  animation: cute-run-swing-a 0.3s ease-in-out infinite;
  transform-origin: center;
}
.robot-cursor.running .robot-arm-right,
.robot-cursor.running .robot-leg-left {
  animation: cute-run-swing-b 0.3s ease-in-out infinite;
  transform-origin: center;
}

.robot-cursor.running .robot-eye {
  rx: 1.5;
  ry: 1.8;
}

@keyframes cute-run {
  0%, 100% { transform: translateY(0) rotate(-6deg) scaleY(0.95); }
  50% { transform: translateY(-3px) rotate(6deg) scaleY(1.05); }
}

@keyframes cute-run-swing-a {
  0%, 100% { transform: rotate(35deg); }
  50% { transform: rotate(-35deg); }
}

@keyframes cute-run-swing-b {
  0%, 100% { transform: rotate(-35deg); }
  50% { transform: rotate(35deg); }
}

/* Flying - 飞行模式 */
.robot-cursor.flying svg {
  animation: cute-fly 0.5s ease-in-out infinite;
}

.robot-cursor.flying .robot-arm-left,
.robot-cursor.flying .robot-arm-right {
  animation: cute-fly-arms 0.4s ease-in-out infinite;
  transform-origin: center;
}

@keyframes cute-fly {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

@keyframes cute-fly-arms {
  0%, 100% { transform: rotate(-40deg); }
  50% { transform: rotate(40deg); }
}

/* Sleeping - 打盹 */
.robot-cursor.sleeping svg {
  animation: cute-sleep 3s ease-in-out infinite;
}

.robot-cursor.sleeping .robot-eye {
  ry: 0.3;
  transform: scaleY(0.15);
  transform-origin: center;
}

.robot-cursor.sleeping .robot-mouth {
  d: path("M 18 18 Q 20 19 22 18");
}

@keyframes cute-sleep {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(0.95); opacity: 0.7; }
}

/* Hovering - 眼睛变 ♥ + 嘴变笑 */
.robot-cursor.hovering svg {
  animation: cute-excited 0.4s ease-in-out infinite;
}

.robot-cursor.hovering .robot-eye {
  fill: #ff6b9d;
}

.robot-cursor.hovering .robot-eye-shine {
  opacity: 0;
}

.robot-cursor.hovering .robot-mouth {
  stroke: #ff6b9d;
  stroke-width: 1.5;
  d: path("M 17 16 Q 20 19 23 16");
}

.robot-cursor.hovering .robot-blush {
  opacity: 1;
  fill: #ff8fa3;
}

.robot-cursor.hovering .robot-antenna-dot {
  fill: #ff6b9d;
  animation: antenna-heart-glow 0.5s ease-in-out infinite alternate;
}

@keyframes cute-excited {
  0%, 100% { transform: translateY(0) scale(1.05); }
  50% { transform: translateY(-3px) scale(1.1); }
}

@keyframes antenna-heart-glow {
  0% { r: 1.8; }
  100% { r: 3; }
}

/* Clicking - 蹲下 + 闪光 */
.robot-cursor.clicking svg {
  animation: cute-squish 0.3s ease-out;
  filter: brightness(1.5) saturate(1.3);
}

.robot-cursor.clicking .robot-torso {
  animation: cute-squat 0.3s ease-out;
  transform-origin: center;
}

.robot-cursor.clicking .robot-head {
  animation: cute-head-bob 0.3s ease-out;
  transform-origin: center;
}

@keyframes cute-squish {
  0% { transform: scale(1); }
  50% { transform: scale(0.75, 1.2); }
  100% { transform: scale(1); }
}

@keyframes cute-squat {
  0% { transform: scaleY(1) translateY(0); }
  50% { transform: scaleY(0.4) translateY(8px); }
  100% { transform: scaleY(1) translateY(0); }
}

@keyframes cute-head-bob {
  0% { transform: translateY(0); }
  50% { transform: translateY(5px) scaleY(0.85); }
  100% { transform: translateY(0); }
}

/* 爱心彩蛋 */
.robot-cursor .robot-heart {
  transform-origin: 20px -3px;
}

.robot-cursor .robot-heart.pulse {
  animation: heart-pulse 1.5s ease-out;
}

@keyframes heart-pulse {
  0% { opacity: 0; transform: scale(0.5) translateY(0); }
  20% { opacity: 1; transform: scale(1.2) translateY(0); }
  100% { opacity: 0; transform: scale(1) translateY(-25px); }
}

/* Zzz */
.robot-zzz {
  position: absolute;
  top: -8px;
  right: -8px;
  font-size: 0;
  color: #4a90e2;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  pointer-events: none;
  opacity: 0;
}

.robot-zzz span {
  display: inline-block;
  font-size: 10px;
  margin-left: -1px;
  opacity: 0;
}

.robot-cursor.sleeping .robot-zzz {
  font-size: 10px;
  opacity: 1;
}

.robot-cursor.sleeping .robot-zzz span:nth-child(1) { animation: zzz-1 2s ease-in infinite; }
.robot-cursor.sleeping .robot-zzz span:nth-child(2) { animation: zzz-2 2s ease-in infinite; }
.robot-cursor.sleeping .robot-zzz span:nth-child(3) { animation: zzz-3 2s ease-in infinite; }

@keyframes zzz-1 {
  0% { opacity: 0; transform: translateY(0); }
  20% { opacity: 1; }
  100% { opacity: 0; transform: translate(-6px, -14px) scale(0.6); }
}
@keyframes zzz-2 {
  0%, 20% { opacity: 0; }
  40% { opacity: 1; }
  100% { opacity: 0; transform: translate(-9px, -18px) scale(0.6); }
}
@keyframes zzz-3 {
  0%, 40% { opacity: 0; }
  60% { opacity: 1; }
  100% { opacity: 0; transform: translate(-12px, -22px) scale(0.6); }
}

/* ===== 脚印系统 ===== */
.cursor-footstep-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99999;
}

.cursor-footstep {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255, 107, 53, 0.4);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: footstep-fade 1.5s ease-out forwards;
}

@keyframes footstep-fade {
  0% { opacity: 0.8; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, calc(-50% + 4px)) scale(1.5); }
}

/* ===== 粒子系统（点击） ===== */
.cursor-particle-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100000;
}

.cursor-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: particle-burst 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes particle-burst {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(calc(-50% + var(--tx)), calc(-50% + var(--ty))) scale(0);
    opacity: 0;
  }
}

/* ===== 屏幕震动 ===== */
.screen-shake {
  animation: screen-shake 0.25s ease-out;
}

@keyframes screen-shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, -2px); }
  80% { transform: translate(2px, 1px); }
}

/* ── v1.4.6 Robot Persona Bubble ── */

.robot-bubble {
  position: absolute;
  top: -22px;
  right: -18px;
  width: 24px;
  height: 24px;
  background: #fff;
  border: 2px solid var(--accent-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
  animation: bubble-bounce 2s ease-in-out infinite;
  z-index: 2;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}

.robot-bubble::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 6px;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid var(--accent-orange);
}

.robot-bubble-emoji {
  font-size: 14px;
  line-height: 1;
  display: block;
}

.robot-bubble.switching {
  animation: bubble-pop 0.4s ease;
  opacity: 0;
  transform: scale(0);
}

@keyframes bubble-bounce {
  0%, 100% { transform: translateY(0) rotate(-5deg); }
  50% { transform: translateY(-3px) rotate(5deg); }
}

@keyframes bubble-pop {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0; transform: scale(0) rotate(180deg); }
  100% { opacity: 1; transform: scale(1) rotate(0); }
}

/* 人物身份背景色（不同 section）*/
.robot-cursor[data-persona="hero"] .robot-bubble { background: #fff8e1; border-color: #ffb300; }
.robot-cursor[data-persona="products"] .robot-bubble { background: #e3f2fd; border-color: #4a90e2; }
.robot-cursor[data-persona="why"] .robot-bubble { background: #fff3e0; border-color: #ff6b35; }
.robot-cursor[data-persona="coverage"] .robot-bubble { background: #fce4ec; border-color: #ec407a; }
.robot-cursor[data-persona="process"] .robot-bubble { background: #e8f5e9; border-color: #10b981; }
.robot-cursor[data-persona="knowledge"] .robot-bubble { background: #f3e5f5; border-color: #9c27b0; }
.robot-cursor[data-persona="faq"] .robot-bubble { background: #fffde7; border-color: #fbc02d; }
.robot-cursor[data-persona="testimonials"] .robot-bubble { background: #fce4ec; border-color: #e91e63; }
.robot-cursor[data-persona="contact"] .robot-bubble { background: #e0f7fa; border-color: #00bcd4; }

/* ═══════════════════════════════════════════════════════════
   GEO v1.5.0 新增 · 7-block 架构样式
   包含：TL;DR · Key Takeaways · Related Guides · Disclosure
   ═══════════════════════════════════════════════════════════ */

/* TL;DR 块（首屏独立结构化段落）*/
.tldr-block {
    margin-top: 20px;
    padding: 16px 20px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, rgba(74, 144, 226, 0.08) 100%);
    border-left: 4px solid var(--accent-orange);
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
}
.tldr-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--accent-orange);
    background: rgba(255, 107, 53, 0.15);
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
}

/* 答案胶囊标准升级（GEO Section 答案胶囊）*/
.section .answer-capsule {
    max-width: 900px;
    margin: 0 auto 32px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.06) 0%, rgba(16, 185, 129, 0.06) 100%);
    border-left: 4px solid var(--accent-blue);
    border-radius: var(--radius-md);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
}
.section .answer-capsule strong {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Key Takeaways 块 */
.key-takeaways {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.04) 0%, rgba(255, 107, 53, 0.04) 100%);
}
.takeaway-list {
    list-style: none;
    padding: 0;
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}
.takeaway-list li {
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-orange);
    border-radius: var(--radius-md);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.takeaway-list li:hover {
    transform: translateX(4px);
    border-left-color: var(--accent-blue);
}
.takeaway-list strong {
    color: var(--accent-orange);
    font-weight: 600;
}

/* Related Guides 网格 */
.related-guides {
    border-top: 1px solid var(--border);
}
.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    max-width: 1100px;
    margin: 0 auto;
}
.guide-card {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.guide-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-orange);
    background: var(--bg-hover);
}
.guide-icon {
    font-size: 28px;
    margin-bottom: 12px;
}
.guide-card h4 {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--text-primary);
}
.guide-card p {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Disclosure 块 */
.disclosure-block {
    background: rgba(13, 19, 33, 0.6);
    border-top: 1px solid var(--border);
    padding: 32px 0;
}
.disclosure-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 24px;
    background: var(--bg-card);
    border-left: 4px solid var(--text-muted);
    border-radius: var(--radius-md);
}
.disclosure-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    background: rgba(94, 106, 128, 0.15);
    padding: 3px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}
.disclosure-content p {
    margin: 0;
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-secondary);
}
.disclosure-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 响应式 */
@media (max-width: 768px) {
    .takeaway-list li {
        padding: 14px 16px;
        font-size: 14px;
    }
    .guides-grid {
        grid-template-columns: 1fr;
    }
    .section .answer-capsule,
    .tldr-block {
        padding: 16px 18px;
        font-size: 14px;
    }
}

/* Ripple 涟漪动画 */
@keyframes ripple-effect {
  to { transform: scale(4); opacity: 0; }
}
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════
   v1.8 视频/图片占位 · 2026-08-02
   替换指南见 README.md「媒体资产替换」
   ═══════════════════════════════════════════════════════════ */

/* 视频占位（保持 16:9 比例 + fallback SVG） */
.video-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.video-placeholder video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-placeholder .video-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.video-placeholder .video-fallback svg {
  width: 100%;
  height: 100%;
  opacity: 0.6;
}

/* 视频角标（占位标识） */
.video-placeholder::before {
  content: '🎬 VIDEO PLACEHOLDER';
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent-orange);
  background: rgba(0, 0, 0, 0.6);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  z-index: 2;
}

/* 图片占位（保持 4:3 或 1:1 比例 + fallback SVG） */
.image-placeholder {
  position: relative;
  width: 100%;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-placeholder .image-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.image-placeholder .image-fallback svg {
  width: 100%;
  height: 100%;
  opacity: 0.6;
}

.image-placeholder::before {
  content: '📷 IMAGE PLACEHOLDER';
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-blue);
  background: rgba(0, 0, 0, 0.6);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  z-index: 2;
}

/* 替换指引（hover 时显示文件名） */
.video-placeholder::after,
.image-placeholder::after {
  content: attr(data-replace);
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.7);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 2;
}

.video-placeholder:hover::after,
.image-placeholder:hover::after {
  opacity: 1;
}

/* ═══════════════════════════════════════════════════════════
   v1.8 CJK 字体优化（中文版 navbar 排版）
   雷神 21:04 截图反馈：cn.html navbar 拥挤
   ═══════════════════════════════════════════════════════════ */

html[lang="zh-CN"] .nav-link {
  font-size: 0.8rem;
  padding: 8px 10px;
}

html[lang="zh-CN"] .nav-menu {
  gap: 2px;
}

html[lang="zh-CN"] .lang-current {
  font-size: 0.8rem;
  padding: 6px 10px;
}

html[lang="zh-CN"] .btn-primary {
  font-size: 0.85rem;
  padding: 10px 16px;
}

/* navbar 媒体查询：窄屏缩小 */
@media (max-width: 1280px) {
  .nav-link {
    padding: 8px 10px;
    font-size: 0.82rem;
  }
  .nav-menu {
    gap: 2px;
  }
}

@media (max-width: 1100px) {
  .navbar-inner {
    padding: 0 16px;
  }
  .nav-link {
    padding: 8px 8px;
    font-size: 0.78rem;
  }
}