/* ============================================================
   MiaoheCMS v2.0 — Official Website Template
   设计理念：专业稳重 · 现代科技 · 企业信赖
   色彩系统：专业蓝主色调 + 冷灰中性色 + 靛青点缀
   排版：Space Grotesk（展示） + 系统字体（正文）
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ============================================================
   CSS Custom Properties / 设计令牌
   ============================================================ */
:root {
  /* 品牌色系 — 专业蓝 */
  --color-primary:       #2563EB;
  --color-primary-dark:  #1D4ED8;
  --color-primary-light: #3B82F6;
  --color-accent:        #6366F1;
  --color-sky:           #0EA5E9;
  --color-amber:         #F59E0B;
  --color-emerald:       #10B981;

  /* 向后兼容的别名 */
  --color-coral:         var(--color-primary);
  --color-coral-dark:    var(--color-primary-dark);
  --color-tangerine:     var(--color-accent);
  --color-yellow:        var(--color-amber);
  --color-mint:          var(--color-emerald);
  --color-blue:          var(--color-primary);

  /* 冷色调中性色（Slate） */
  --gray-50:  #F8FAFC;
  --gray-75:  #F1F5F9;
  --gray-100: #E2E8F0;
  --gray-200: #CBD5E1;
  --gray-300: #94A3B8;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  /* 语义色 */
  --text-primary:    var(--gray-800);
  --text-secondary:  var(--gray-500);
  --text-muted:      var(--gray-400);
  --text-inverse:    rgba(255,255,255,0.94);
  --text-inverse-dim: rgba(255,255,255,0.7);

  /* 表面 */
  --surface-page:    #FAFBFC;
  --surface-card:    #ffffff;
  --surface-elevated: #ffffff;

  /* 边框 */
  --border-light: var(--gray-100);
  --border-card:  var(--gray-200);

  /* 阴影 — 冷色底调 */
  --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 56px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 32px 72px rgba(15, 23, 42, 0.16);

  /* 渐变 */
  --gradient-brand:       linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
  --gradient-brand-hover: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  --gradient-hero:        linear-gradient(170deg, #F0F5FF 0%, #E0EAF8 30%, #DBEAFE 70%, #EEF4FF 100%);
  --gradient-cta:         linear-gradient(135deg, #2563EB 0%, #6366F1 100%);
  --gradient-card:        linear-gradient(135deg, rgba(37,99,235,0.04) 0%, rgba(99,102,241,0.04) 100%);
  --gradient-accent:      linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);

  /* 排版 */
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  /* 字号梯度 (Major Third 1.25) */
  --text-xs:   clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);
  --text-sm:   clamp(0.8125rem, 0.77rem + 0.18vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.89rem + 0.2vw, 1rem);
  --text-lg:   clamp(1.0625rem, 0.98rem + 0.35vw, 1.25rem);
  --text-xl:   clamp(1.25rem, 1.1rem + 0.65vw, 1.563rem);
  --text-2xl:  clamp(1.563rem, 1.35rem + 0.9vw, 1.953rem);
  --text-3xl:  clamp(1.953rem, 1.6rem + 1.5vw, 2.441rem);
  --text-4xl:  clamp(2.441rem, 1.9rem + 2.3vw, 3.5rem);
  --text-5xl:  clamp(3rem, 2.2rem + 3.4vw, 5rem);

  /* 间距梯度 (4pt base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* 布局 */
  --container-max: 1200px;
  --container-narrow: 860px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 过渡 */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--gray-900);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

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

/* ============================================================
   Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-20);
}

.section-tight { padding-block: var(--space-12); }
.section-hero { padding-block: var(--space-32) var(--space-24); }

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 32rem;
  margin-inline: auto;
}

/* ============================================================
   Top Bar
   ============================================================ */
.top-bar {
  background: var(--gray-900);
  color: var(--text-inverse-dim);
  font-size: var(--text-xs);
  padding-block: 6px;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.top-bar a {
  color: var(--color-sky);
  transition: color var(--duration-fast);
}

.top-bar a:hover { color: #fff; }

.top-bar-sep {
  color: rgba(255,255,255,0.2);
  margin-inline: var(--space-2);
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-base) var(--ease-out-quart);
}

.header.scrolled {
  border-bottom-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-8);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--gray-900);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.125rem;
  font-weight: 700;
  flex-shrink: 0;
}

.logo-text {
  white-space: nowrap;
}

.logo-version {
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 4px;
  font-weight: 600;
}

/* ============================================================
   Navigation — 统一硬编码项与 nav_menu 动态项样式
   ============================================================ */
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* 所有顶级 li */
.nav-list > li {
  position: relative;
}

/* 所有顶级链接 — 覆盖 .nav-link 和 nav_menu 生成的 <a> */
.nav-list > li > a {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out-quart);
  white-space: nowrap;
}

.nav-list > li > a:hover {
  color: var(--gray-900);
  background: var(--gray-75);
}

/* active 状态 */
.nav-list > li > a.active,
.nav-list > li.active > a {
  color: var(--color-primary);
  background: rgba(37,99,235,0.06);
}

/* ---- 下拉菜单（硬编码 .nav-dropdown + nav_menu .has-sub 统一） ---- */
.nav-dropdown,
.has-sub {
  position: relative;
}

/* 下拉箭头 */
.nav-dropdown > a svg,
.sub-arrow {
  display: inline-block;
  font-size: 0.7em;
  margin-left: 2px;
  transition: transform var(--duration-fast);
}

.nav-dropdown:hover > a svg {
  transform: rotate(180deg);
}

/* 下拉菜单容器 — 硬编码 .nav-sub 和 nav_menu .sub-menu 统一 */
.nav-sub,
.sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-base) var(--ease-out-expo);
  z-index: 101;
}

.nav-dropdown:hover .nav-sub,
.has-sub:hover .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 子菜单项 — 统一 .nav-sub-link 和 sub-menu 内的 a */
.nav-sub-link,
.sub-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.nav-sub-link:hover,
.sub-menu a:hover {
  color: var(--color-primary);
  background: rgba(37,99,235,0.06);
}

/* 子菜单 active */
.sub-menu li.active > a {
  color: var(--color-primary);
  background: rgba(37,99,235,0.06);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out-quart);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 2px 12px rgba(37,99,235,0.35);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(37,99,235,0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
}

.btn-outline:hover {
  border-color: var(--gray-400);
  background: var(--gray-75);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--gray-900);
  background: var(--gray-75);
}

.btn-lg {
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

.btn-xl {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

.btn-cta {
  background: var(--gradient-cta);
  color: #fff;
  padding: var(--space-4) var(--space-10);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(37,99,235,0.4);
  transition: all var(--duration-base) var(--ease-out-quart);
}

.btn-cta:hover {
  box-shadow: 0 6px 32px rgba(37,99,235,0.55);
  transform: translateY(-2px);
}

/* Mobile Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out-quart);
}

/* ============================================================
   Hero Section — 浅蓝渐变背景
   ============================================================ */
.hero {
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-block: var(--space-24) var(--space-16);
}

/* Decorative background elements */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(37,99,235,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(99,102,241,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 50% 80%, rgba(14,165,233,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 70%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.12;
  pointer-events: none;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: var(--color-primary);
  top: -200px;
  right: -150px;
}

.hero-orb-2 {
  width: 350px;
  height: 350px;
  background: var(--color-accent);
  bottom: -100px;
  left: -100px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content {
  color: var(--gray-800);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(37,99,235,0.15);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.hero-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.5); }
}

.hero h1 {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
}

.hero h1 .highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-actions .btn-outline {
  color: var(--gray-700);
  border-color: var(--gray-300);
}

.hero-actions .btn-outline:hover {
  background: rgba(255,255,255,0.7);
  border-color: var(--gray-400);
  color: var(--gray-900);
}

/* Hero Visual — 深色代码块形成对比 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-code-block {
  width: 100%;
  max-width: 480px;
  background: rgba(15,23,42,0.9);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.35);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-filename {
  margin-left: 8px;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  font-family: var(--font-mono);
}

.hero-code-block pre {
  padding: 20px;
  overflow-x: auto;
}

.hero-code-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #c9d1d9;
}

.code-tag     { color: #ff79c6; }
.code-attr    { color: #50fa7b; }
.code-val     { color: #f1fa8c; }
.code-func    { color: #8be9fd; }
.code-comment { color: #6272a4; }
.code-str     { color: #f1fa8c; }

/* Stats Bar */
.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-10);
  border-top: 1px solid rgba(0,0,0,0.06);
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.1;
}

.stat-suffix {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  margin-left: 2px;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================================
   Feature Section
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-base) var(--ease-out-quart);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.25);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.375rem;
  margin-bottom: var(--space-5);
  background: var(--gradient-card);
}

.feature-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  color: var(--gray-900);
}

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

.feature-card .feature-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--duration-fast);
}

.feature-card:hover .feature-link {
  gap: 8px;
}

/* ============================================================
   Tech Stack Section — 浅蓝灰背景
   ============================================================ */
.tech-section {
  background: linear-gradient(160deg, #F8FBFF 0%, #F0F5FF 50%, #F8FAFE 100%);
  position: relative;
  overflow: hidden;
}

.tech-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(37,99,235,0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(99,102,241,0.03) 0%, transparent 50%);
  pointer-events: none;
}

.tech-section .section-label {
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
}

.tech-section .section-title {
  color: var(--gray-900);
}

.tech-section .section-subtitle {
  color: var(--text-secondary);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  position: relative;
  z-index: 1;
}

.tech-item {
  text-align: center;
  padding: var(--space-6);
  background: #ffffff;
  border: 1px solid rgba(37,99,235,0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-base) var(--ease-out-quart);
}

.tech-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37,99,235,0.22);
}

.tech-item-icon {
  font-size: 2rem;
  margin-bottom: var(--space-3);
  display: block;
}

.tech-item h4 {
  font-size: var(--text-base);
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.tech-item span {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ============================================================
   Ecosystem / Product Cards
   ============================================================ */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.eco-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out-quart);
}

.eco-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.eco-card-main {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.eco-card.current {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(37,99,235,0.12);
}

.eco-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  width: fit-content;
}

.eco-badge.active {
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
}

.eco-badge.coming {
  color: var(--color-accent);
  background: rgba(99,102,241,0.08);
}

.eco-badge.coming::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
  animation: pulse-dot 2s ease-in-out infinite;
}

.eco-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.eco-card .eco-desc {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  flex: 1;
}

.eco-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.eco-feat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.eco-feat::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--gradient-brand);
  border-radius: 50%;
  flex-shrink: 0;
}

.eco-card.coming .eco-feat::before {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary-light));
}

/* ============================================================
   Advantages Section
   ============================================================ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.adv-card {
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  transition: all var(--duration-base) var(--ease-out-quart);
}

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

.adv-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(37,99,235,0.06);
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  pointer-events: none;
}

.adv-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}

.adv-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ============================================================
   CTA Section — 蓝色渐变
   ============================================================ */
.cta-section {
  position: relative;
  background: var(--gradient-cta);
  text-align: center;
  padding-block: var(--space-24);
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(255,255,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .section-label {
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
}

.cta-section h2 {
  color: #fff;
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  max-width: 500px;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.cta-section .btn-cta {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}

.cta-section .btn-cta:hover {
  box-shadow: 0 6px 32px rgba(0,0,0,0.22);
  transform: translateY(-2px);
  color: var(--color-primary-dark);
}

.cta-section .btn-outline {
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}

.cta-section .btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.7);
  color: #fff;
}

/* ============================================================
   Page Header (Inner Pages) — 浅蓝渐变
   ============================================================ */
.page-hero {
  background: var(--gradient-hero);
  padding-block: var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 80%, rgba(37,99,235,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero h1 {
  color: var(--gray-900);
  font-size: var(--text-3xl);
  position: relative;
  z-index: 1;
}

.page-hero p {
  color: var(--text-secondary);
  margin-top: var(--space-3);
  font-size: var(--text-lg);
  position: relative;
  z-index: 1;
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

.breadcrumb a:hover { color: var(--color-primary); }

.breadcrumb .sep {
  color: var(--gray-300);
  font-size: var(--text-xs);
}

.breadcrumb .current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================================
   Content Layout (List / Show / Page)
   ============================================================ */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-10);
  padding-block: var(--space-8);
}

.content-main {
  min-width: 0;
}

/* ============================================================
   Article List
   ============================================================ */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.article-item {
  display: flex;
  gap: var(--space-6);
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--duration-base) var(--ease-out-quart);
}

.article-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.article-thumb {
  width: 200px;
  height: 140px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--gray-100);
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out-quart);
}

.article-item:hover .article-thumb img {
  transform: scale(1.05);
}

.article-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.article-info h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.article-info h3 a {
  color: var(--gray-900);
  transition: color var(--duration-fast);
}

.article-info h3 a:hover {
  color: var(--color-primary);
}

.article-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: auto;
}

.article-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: all var(--duration-fast);
}

.pagination a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(37,99,235,0.04);
}

.pagination .current {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
}

/* ============================================================
   Article Detail
   ============================================================ */
.article-detail {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
}

.article-detail .article-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.article-detail .article-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.article-body {
  font-size: var(--text-base);
  line-height: 1.85;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: var(--text-xl);
  margin: var(--space-8) 0 var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--border-light);
}

.article-body h3 {
  font-size: var(--text-lg);
  margin: var(--space-6) 0 var(--space-3);
}

.article-body p {
  margin-bottom: var(--space-4);
}

.article-body img {
  border-radius: var(--radius-md);
  margin: var(--space-6) auto;
}

.article-body pre {
  background: var(--gray-800);
  color: #c9d1d9;
  border-radius: var(--radius-md);
  padding: var(--space-6);
  overflow-x: auto;
  margin: var(--space-6) 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-primary);
}

.article-body pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.article-body blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: rgba(37,99,235,0.03);
  color: var(--text-secondary);
  font-style: italic;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-body ul,
.article-body ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: var(--space-2); }

/* Tags */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-light);
}

.article-tags span {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
}

.article-tags a {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background: var(--gray-75);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast);
}

.article-tags a:hover {
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
}

/* Article Nav (Prev/Next) */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.article-nav a {
  display: block;
  padding: var(--space-5);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.article-nav a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(37,99,235,0.03);
}

.article-nav .nav-next {
  text-align: right;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.widget {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.widget h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.widget h4::before {
  content: '';
  width: 3px;
  height: 16px;
  background: var(--gradient-brand);
  border-radius: 3px;
}

/* Sidebar list */
.widget-list li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--gray-75);
}

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

.widget-list a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--duration-fast);
}

.widget-list a:hover {
  color: var(--color-primary);
}

.widget-list .rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--gray-300);
  border-radius: 4px;
  margin-right: var(--space-2);
}

.widget-list li:nth-child(1) .rank,
.widget-list li:nth-child(2) .rank,
.widget-list li:nth-child(3) .rank {
  background: var(--gradient-brand);
}

/* Tag Cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag-cloud a {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background: var(--gray-75);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast);
}

.tag-cloud a:hover {
  color: var(--color-primary);
  background: rgba(37,99,235,0.08);
}

/* Search */
.widget-search form {
  display: flex;
  gap: 0;
}

.widget-search input {
  flex: 1;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-light);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--duration-fast);
}

.widget-search input:focus {
  border-color: var(--color-primary);
}

.widget-search button {
  padding: var(--space-2) var(--space-4);
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  transition: opacity var(--duration-fast);
}

.widget-search button:hover {
  opacity: 0.9;
}

/* ============================================================
   Footer — 深色底
   ============================================================ */
.footer {
  background: var(--gray-900);
  color: var(--text-inverse-dim);
  padding-top: var(--space-20);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-16);
}

.footer-col h4 {
  color: #fff;
  font-size: var(--text-base);
  margin-bottom: var(--space-5);
  position: relative;
  padding-bottom: var(--space-3);
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.footer-about p {
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.footer-contact span {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col ul a {
  font-size: var(--text-sm);
  color: var(--text-inverse-dim);
  transition: all var(--duration-fast);
  display: inline-flex;
  align-items: center;
}

.footer-col ul a::before {
  content: '';
  width: 0;
  height: 1px;
  background: var(--color-sky);
  margin-right: 0;
  transition: all var(--duration-fast);
}

.footer-col ul a:hover {
  color: #fff;
}

.footer-col ul a:hover::before {
  width: 12px;
  margin-right: var(--space-2);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-bottom a {
  color: var(--color-sky);
  font-weight: 500;
}

.footer-bottom a:hover {
  color: #fff;
}

/* ============================================================
   Back to Top
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--duration-base) var(--ease-out-quart);
  box-shadow: var(--shadow-sm);
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate {
  animation: fadeInUp var(--duration-slow) var(--ease-out-expo) both;
}

.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

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

/* ============================================================
   Responsive
   ============================================================ */

/* Tablet (1024px-) */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .ecosystem-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .content-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }

  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .stat-item:nth-child(n+3) { display: none; }
}

/* Mobile (768px-) */
@media (max-width: 768px) {
  :root {
    --space-20: 3rem;
    --space-24: 4rem;
    --space-32: 5rem;
  }

  .section { padding-block: var(--space-12); }
  .section-hero { padding-block: var(--space-16) var(--space-12); }

  .header-inner { height: 60px; }

  /* Mobile Navigation */
  .menu-toggle { display: flex; }
  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--surface-card);
    flex-direction: column;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration-base) var(--ease-out-expo);
    overflow-y: auto;
    z-index: 99;
  }
  .nav.open { transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: var(--space-1); }

  /* 移动端所有导航链接统一样式 */
  .nav-list > li > a {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
  }

  .nav-sub,
  .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--gray-50);
    margin-left: var(--space-4);
    margin-top: var(--space-1);
  }
  .header-actions { display: none; }

  .features-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr 1fr; }
  .adv-grid { grid-template-columns: 1fr; }

  .hero h1 { font-size: var(--text-3xl); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }

  .article-item { flex-direction: column; }
  .article-thumb { width: 100%; height: 180px; }

  .article-detail { padding: var(--space-6); }
  .article-nav { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; text-align: center; }

  .back-to-top { bottom: var(--space-4); right: var(--space-4); }
}

/* Small Mobile (480px-) */
@media (max-width: 480px) {
  .tech-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .cta-section { padding-block: var(--space-16); }
  .page-hero { padding-block: var(--space-12); }
}