/**
 * 柏行智数 BexByte — 官方网站设计系统
 * 版本: 1.0
 * 基于: 品牌策划方案 v1.0
 */

/* ============================================
 * 1. 设计令牌 (Design Tokens)
 * ============================================ */

:root {
  /* 色彩系统 */
  --brand-primary: #2563EB;
  --brand-primary-light: #3B82F6;
  --brand-primary-dark: #1D4ED8;
  
  --bg-deep: #0A0E1A;
  --bg-dark: #111827;
  --bg-card: #1A1F2E;
  --bg-elevated: #1E2435;
  --bg-light: #F8FAFC;
  
  --accent-cyan: #06B6D4;
  --accent-purple: #8B5CF6;
  --accent-green: #10B981;
  --accent-orange: #F59E0B;
  
  --neutral-900: #1E293B;
  --neutral-700: #334155;
  --neutral-500: #64748B;
  --neutral-300: #CBD5E1;
  --neutral-100: #F1F5F9;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #2563EB 0%, #8B5CF6 100%);
  --gradient-secondary: linear-gradient(135deg, #06B6D4 0%, #2563EB 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(37,99,235,0.15) 0%, transparent 70%);
  --gradient-orbit: linear-gradient(90deg, #06B6D4 0%, #2563EB 50%, #8B5CF6 100%);
  --gradient-text: linear-gradient(135deg, #06B6D4 0%, #2563EB 50%, #8B5CF6 100%);
  
  /* 字体 */
  --font-brand: 'Inter', 'Noto Sans SC', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --font-data: 'JetBrains Mono', 'DIN Pro', monospace;
  
  /* 间距 */
  --space-1: 4px; --space-2: 8px; --space-3: 12px;
  --space-4: 16px; --space-5: 20px; --space-6: 24px;
  --space-8: 32px; --space-10: 40px; --space-12: 48px;
  --space-16: 64px; --space-20: 80px; --space-24: 96px;
  --space-32: 128px;
  
  /* 布局 */
  --container-xl: 1280px;
  --nav-height: 72px;
  
  /* 圆角 */
  --radius-sm: 4px; --radius-md: 8px;
  --radius-lg: 12px; --radius-xl: 16px; --radius-full: 9999px;
  
  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ============================================
 * 2. 全局重置与基础样式
 * ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  color: #F1F5F9;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ============================================
 * 3. 导航栏 (Navigation)
 * ============================================ */

.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 1000;
  transition: all var(--transition-base);
}

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

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.navbar__logo img,
.navbar__logo svg {
  height: 36px;
  width: auto;
}

.navbar__logo .logo-text {
  font-family: var(--font-brand);
  font-size: 1.125rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.navbar__logo .logo-text--small {
  font-size: 0.95rem;
  font-weight: 600;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar__link {
  padding: var(--space-2) var(--space-4);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.navbar__link:hover,
.navbar__link.active {
  color: #fff;
  background: rgba(37,99,235,0.1);
}

.navbar__link.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.navbar__cta {
  padding: var(--space-2) var(--space-5) !important;
  background: var(--gradient-primary);
  color: #fff !important;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.navbar__cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(37,99,235,0.35);
}

/* 导航栏产品下拉菜单 */
.navbar__dropdown {
  position: relative;
}

.navbar__dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  text-decoration: none;
}

.navbar__dropdown-trigger svg {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.navbar__dropdown:hover .navbar__dropdown-trigger,
.navbar__dropdown.active .navbar__dropdown-trigger {
  color: #fff;
  background: rgba(37,99,235,0.1);
}

.navbar__dropdown:hover .navbar__dropdown-trigger svg {
  transform: rotate(180deg);
}

.navbar__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 8px;
  min-width: 200px;
  background: rgba(16, 20, 36, 0.97);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.25s ease;
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.navbar__dropdown:hover .navbar__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar__dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--neutral-400);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.navbar__dropdown-item:hover {
  color: #fff;
  background: rgba(37,99,235,0.12);
}

.navbar__dropdown-item .dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.navbar__dropdown-item .dropdown-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.navbar__dropdown-item .dropdown-text span:first-child {
  font-weight: 600;
  color: #fff;
}

.navbar__dropdown-item .dropdown-text span:last-child {
  font-size: 0.75rem;
  color: var(--neutral-500);
  font-weight: 400;
}

/* 能力矩阵工具提示 */
.matrix-tooltip {
  position: relative;
  cursor: pointer;
}

.matrix-tooltip .tag {
  transition: all var(--transition-fast);
}

.matrix-tooltip:hover .tag {
  transform: scale(1.05);
}

.matrix-tooltip-popup {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 200px;
  background: rgba(16, 20, 36, 0.97);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}

.matrix-tooltip-popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(16, 20, 36, 0.97);
}

.matrix-tooltip:hover .matrix-tooltip-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.matrix-tooltip-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.matrix-tooltip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.matrix-tooltip-list li {
  font-size: 0.72rem;
  color: var(--neutral-400);
  background: rgba(255,255,255,0.05);
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
  transition: color 0.15s;
}

.matrix-tooltip-list li:hover {
  color: #fff;
  background: rgba(37,99,235,0.15);
}

/* 移动端菜单按钮 */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}

.navbar__toggle span {
  width: 24px; height: 2px;
  background: var(--neutral-300);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ============================================
 * 4. 容器与网格 (Layout)
 * ============================================ */

.container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
  position: relative;
}

.section--sm { padding: var(--space-16) 0; }

.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-16);
}

.section__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  background: rgba(37,99,235,0.15);
  color: var(--brand-primary-light);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section__title {
  font-family: var(--font-brand);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--neutral-500);
  line-height: 1.7;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }

/* ============================================
 * 5. 排版组件 (Typography)
 * ============================================ */

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

.text-center { text-align: center; }
.text-muted { color: var(--neutral-500); }

.metric-value {
  font-family: var(--font-data);
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--neutral-500);
  margin-top: var(--space-1);
}

/* ============================================
 * 6. 按钮组件 (Buttons)
 * ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-brand);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.45);
}

.btn--secondary {
  background: transparent;
  color: var(--neutral-300);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn--secondary:hover {
  color: #fff;
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.05);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn--icon {
  width: 44px; height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ============================================
 * 7. 卡片组件 (Cards)
 * ============================================ */

.card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,0.3), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3), 0 0 40px rgba(37,99,235,0.08);
}

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

.card__icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-5);
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.2);
}

.card__title {
  font-family: var(--font-brand);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: #fff;
}

.card__desc {
  font-size: 0.95rem;
  color: var(--neutral-500);
  line-height: 1.7;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-primary-light);
  transition: all var(--transition-fast);
}

.card__link:hover {
  gap: var(--space-3);
  color: #60a5fa;
}

/* 特色卡片 - 带图标背景 */
.feature-card {
  position: relative;
  padding: var(--space-10) var(--space-8);
}

.feature-card .card__icon {
  font-size: 2rem;
  width: 72px; height: 72px;
}

/* ============================================
 * 8. Hero 区域 (Hero Section)
 * ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  width: 800px; height: 800px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
}

.hero__glow--1 {
  top: -200px;
  right: -200px;
  background: var(--brand-primary);
}

.hero__glow--2 {
  bottom: -300px;
  left: -200px;
  background: var(--accent-purple);
}

/* 星轨网格背景 */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--brand-primary-light);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease-out;
}

.hero__title {
  font-family: var(--font-brand);
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--neutral-500);
  line-height: 1.75;
  max-width: 580px;
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero__stats {
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid rgba(255,255,255,0.06);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero__stat-item { text-align: center; }
.hero__stat-value { font-family: var(--font-data); font-size: 1.75rem; font-weight: 700; color: #fff; }
.hero__stat-label { font-size: 0.85rem; color: var(--neutral-500); margin-top: 2px; }

/* Hero 右侧视觉 */
.hero__visual {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInRight 0.8s ease-out 0.3s both;
}

/* 数据流动画容器 */
.data-flow {
  width: 420px;
  height: 420px;
  position: relative;
}

.orbit-ring {
  position: absolute;
  border: 1px solid;
  border-radius: 50%;
  opacity: 0.15;
}

.orbit-ring:nth-child(1) {
  width: 100%; height: 100%;
  border-color: var(--brand-primary);
  top: 0; left: 0;
  animation: orbitSpin 20s linear infinite;
}

.orbit-ring:nth-child(2) {
  width: 75%; height: 75%;
  border-color: var(--accent-cyan);
  top: 12.5%; left: 12.5%;
  animation: orbitSpin 15s linear infinite reverse;
}

.orbit-ring:nth-child(3) {
  width: 50%; height: 50%;
  border-color: var(--accent-purple);
  top: 25%; left: 25%;
  animation: orbitSpin 10s linear infinite;
}

.data-node {
  position: absolute;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--brand-primary);
  box-shadow: 0 0 12px var(--brand-primary);
}

.data-node:nth-child(4) { top: 0; left: 50%; transform: translateX(-50%); }
.data-node:nth-child(5) { top: 50%; right: 0; transform: translateY(-50%); background: var(--accent-cyan); box-shadow: 0 0 12px var(--accent-cyan); }
.data-node:nth-child(6) { bottom: 0; left: 50%; transform: translateX(-50%); background: var(--accent-purple); box-shadow: 0 0 12px var(--accent-purple); }

.center-icon {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100px; height: 100px;
  border-radius: 28px;
  background: var(--bg-card);
  border: 1px solid rgba(37,99,235,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  box-shadow: 0 0 60px rgba(37,99,235,0.15);
}

@keyframes orbitSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ============================================
 * 9. 页脚 (Footer)
 * ============================================ */

.footer {
  background: var(--bg-dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-16) 0 var(--space-8);
}

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

.footer__brand p {
  color: var(--neutral-500);
  font-size: 0.9rem;
  margin-top: var(--space-4);
  max-width: 320px;
  line-height: 1.7;
}

.footer__col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  margin-bottom: var(--space-5);
}

.footer__col a {
  display: block;
  font-size: 0.9rem;
  color: var(--neutral-500);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer__col a:hover { color: #fff; }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.85rem;
  color: var(--neutral-500);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal a:hover { color: #fff; }

/* ============================================
 * 10. 表单组件 (Forms)
 * ============================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neutral-300);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: #fff;
  background: var(--bg-dark);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--neutral-500); }

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form-checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.form-checkbox {
  width: 18px; height: 18px;
  accent-color: var(--brand-primary);
  cursor: pointer;
}

.form-checkbox-label {
  font-size: 0.9rem;
  color: var(--neutral-300);
  cursor: pointer;
}

.form-error {
  font-size: 0.8rem;
  color: #EF4444;
  margin-top: var(--space-1);
}

/* ============================================
 * 11. 页面横幅 (Page Banner)
 * ============================================ */

.page-banner {
  padding: calc(var(--nav-height) + var(--space-20)) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.page-banner__bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(37,99,235,0.1) 0%, transparent 70%),
    var(--bg-deep);
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.page-banner__title {
  font-family: var(--font-brand);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.page-banner__desc {
  font-size: 1.1rem;
  color: var(--neutral-500);
  max-width: 600px;
  line-height: 1.7;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--neutral-500);
  margin-bottom: var(--space-6);
}

.breadcrumb a { color: var(--neutral-500); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: #fff; }

/* ============================================
 * 12. 标签/徽章 (Tags & Badges)
 * ============================================ */

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.12);
  color: var(--brand-primary-light);
  border: 1px solid rgba(37,99,235,0.2);
}

.tag--cyan { background: rgba(6,182,212,0.12); color: var(--accent-cyan); border-color: rgba(6,182,212,0.2); }
.tag--purple { background: rgba(139,92,246,0.12); color: var(--accent-purple); border-color: rgba(139,92,246,0.2); }
.tag--green { background: rgba(16,185,129,0.12); color: var(--accent-green); border-color: rgba(16,185,129,0.2); }

/* ============================================
 * 13. 时间线 (Timeline)
 * ============================================ */

.timeline {
  position: relative;
  padding-left: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--brand-primary), var(--accent-purple));
  opacity: 0.3;
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-10);
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-10) + 11px);
  top: 4px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 3px solid var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.15);
}

.timeline__year {
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary-light);
  margin-bottom: var(--space-1);
}

.timeline__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-2);
}

.timeline__desc {
  font-size: 0.9rem;
  color: var(--neutral-500);
  line-height: 1.65;
}

/* ============================================
 * 14. 工具卡片 (Tool Cards)
 * ============================================ */

.tool-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.tool-card:hover {
  border-color: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.tool-card__header {
  padding: var(--space-6) var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tool-card__name {
  font-weight: 700;
  font-size: 1.1rem;
}

.tool-card__status {
  font-size: 0.78rem;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.tool-card__status--active {
  background: rgba(16,185,129,0.12);
  color: var(--accent-green);
}

.tool-card__status--beta {
  background: rgba(245,158,11,0.12);
  color: var(--accent-orange);
}

.tool-card__body {
  padding: var(--space-8);
}

.tool-card__desc {
  color: var(--neutral-500);
  font-size: 0.93rem;
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.tool-card__features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ============================================
 * 15. 招募卡片 (Partner Card)
 * ============================================ */

.partner-benefit {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.partner-benefit:hover {
  border-color: rgba(37,99,235,0.2);
  background: rgba(26,31,46,0.8);
}

.partner-benefit__icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: rgba(37,99,235,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.partner-benefit__title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--space-1);
}

.partner-benefit__desc {
  font-size: 0.88rem;
  color: var(--neutral-500);
  line-height: 1.6;
}

/* ============================================
 * 16. 动画工具类
 * ============================================ */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
 * 17. 响应式设计
 * ============================================ */

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .hero__visual { display: none; }
  .data-flow { width: 320px; height: 320px; }
}

@media (max-width: 768px) {
  .navbar__links { display: none; }
  .navbar__toggle { display: flex; }
  
  /* 移动端产品下拉菜单样式 */
  .navbar__links.navbar__links--open .navbar__dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: none;
    backdrop-filter: none;
    padding: 0 0 0 var(--space-6);
    margin-top: 0;
    min-width: auto;
  }
  .navbar__links.navbar__links--open .navbar__dropdown-trigger svg {
    transform: rotate(180deg);
  }
  .navbar__links.navbar__links--open .navbar__dropdown-item {
    padding: var(--space-3) var(--space-4);
    color: var(--neutral-400);
  }
  .navbar__links.navbar__links--open .navbar__dropdown-item span:first-child {
    color: var(--neutral-300);
  }
  
  /* 能力矩阵弹窗在移动端居中 */
  .matrix-tooltip-popup {
    left: 0;
    transform: translateX(0) translateY(4px);
  }
  .matrix-tooltip:hover .matrix-tooltip-popup {
    transform: translateX(0) translateY(0);
  }
  .matrix-tooltip-popup::after {
    left: 30px;
  }
  
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  
  .hero { min-height: auto; padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-12); }
  .hero__stats { flex-wrap: wrap; gap: var(--space-8); }
  
  .section { padding: var(--space-16) 0; }
  .page-banner { padding: calc(var(--nav-height) + var(--space-12)) 0 var(--space-10); }
  
  .footer__inner { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  
  .tool-card__header { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }
  .hero__actions { flex-direction: column; }
  .btn--lg { width: 100%; }
}

/* ============================================
 * 18. 工具类 (Utilities)
 * ============================================ */

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

/* ============================================
 * 语言切换按钮 (Language Switch)
 * ============================================ */
.lang-switch {
  display: flex;
  align-items: center;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.lang-switch__item {
  color: var(--neutral-500);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.lang-switch__item:hover {
  color: var(--neutral-200);
  background: rgba(255,255,255,0.06);
}
.lang-switch__item.active {
  color: #fff;
  font-weight: 600;
}
.lang-switch__sep {
  color: var(--neutral-600);
  font-size: 0.72rem;
  user-select: none;
}
.lang-switch--footer {
  font-size: 0.78rem;
}
.footer__bottom-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* ============================================
 * 动画关键帧 (Animations)
 * ============================================ */
@keyframes ripple {
  0% { transform: scale(0.5); opacity: 1; }
  100% { transform: scale(2.5); opacity: 0; }
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(45deg); opacity: 0.3; }
  50% { transform: translateY(-15px) rotate(55deg); opacity: 0.6; }
}