/* ==========================================================================
   上海未来力教育科技有限公司 - 官网核心样式系统 (Design System)
   ========================================================================== */

:root {
  /* 基础与背景色彩 */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: rgba(18, 26, 47, 0.7);
  --bg-card-hover: rgba(28, 40, 70, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  --bg-glass-nav: rgba(9, 13, 22, 0.88);

  /* 核心品牌色系 */
  --primary: #3b82f6;          /* 科技蓝 */
  --primary-light: #60a5fa;
  --accent-cyan: #06b6d4;      /* 未来青 */
  --accent-purple: #8b5cf6;    /* 智慧紫 */
  --accent-emerald: #10b981;   /* 生机绿 */
  --accent-amber: #f59e0b;     /* 创新橙 */

  /* 文字色彩 */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-highlight: #38bdf8;

  /* 边框与阴影 */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.15);
  --border-glow: rgba(56, 189, 248, 0.35);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px -5px rgba(6, 182, 212, 0.3);
  --shadow-purple-glow: 0 0 30px -5px rgba(139, 92, 246, 0.3);

  /* 尺寸与过渡 */
  --max-width: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 全局重置与排版基础 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
}

/* 背景流动光斑 */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.45;
  animation: floatOrb 20s infinite alternate ease-in-out;
}

.orb-1 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.5) 0%, rgba(15, 23, 42, 0) 70%);
  top: -100px;
  right: -100px;
}

.orb-2 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, rgba(15, 23, 42, 0) 70%);
  bottom: 10%;
  left: -150px;
  animation-duration: 25s;
}

.orb-3 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.35) 0%, rgba(15, 23, 42, 0) 70%);
  top: 45%;
  right: 10%;
  animation-duration: 18s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(1.08); }
  100% { transform: translate(30px, -40px) scale(0.95); }
}

/* 通用容器与排版 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

section {
  padding: 100px 0;
  position: relative;
}

/* 渐变与强调文本 */
.text-gradient {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 区块标题标准规范 */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 按钮规范体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.55);
  background: linear-gradient(135deg, #1d4ed8 0%, #4338ca 100%);
}

.btn-glow {
  background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
}

.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(14, 165, 233, 0.7);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border-color: var(--border-light);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-highlight);
  transform: translateY(-2px);
}

/* ==========================================================================
   1. 导航栏 (Navbar)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-normal);
  background: transparent;
}

.site-header.scrolled {
  background: var(--bg-glass-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  transition: height 0.3s;
}

.site-header.scrolled .navbar {
  height: 70px;
}

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

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #0284c7 0%, #6366f1 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.4);
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.2px;
  line-height: 1.1;
}

.logo-tagline {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   2. 首屏区域 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: 180px;
  padding-bottom: 120px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  max-width: 680px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #06b6d4;
  box-shadow: 0 0 10px #06b6d4;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.2px;
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-number span {
  color: var(--accent-cyan);
  font-size: 1.6rem;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 首屏右侧科技动态图景展示 */
.hero-visual {
  position: relative;
}

.visual-card-wrapper {
  position: relative;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.85) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
  transition: transform 0.5s ease;
}

.visual-card-wrapper:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.interactive-mock-window {
  border-radius: 12px;
  background: rgba(10, 15, 29, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.mock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mock-dots {
  display: flex;
  gap: 6px;
}

.mock-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.mock-title {
  font-size: 0.8rem;
  color: var(--text-subtle);
  font-family: monospace;
}

.mock-body {
  padding: 24px;
}

.ai-chat-bubble {
  margin-bottom: 18px;
  display: flex;
  gap: 12px;
}

.bubble-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: bold;
  flex-shrink: 0;
}

.avatar-ai {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  color: white;
}

.avatar-user {
  background: #334155;
  color: #cbd5e1;
}

.bubble-content {
  background: rgba(255, 255, 255, 0.04);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.6;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.bubble-ai .bubble-content {
  background: rgba(14, 165, 233, 0.08);
  border-color: rgba(14, 165, 233, 0.2);
}

.ai-tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.ai-pill-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 6px;
  color: var(--text-highlight);
}

.floating-badge {
  position: absolute;
  padding: 12px 20px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatBadge 6s ease-in-out infinite alternate;
}

.floating-badge-1 {
  bottom: -20px;
  left: -20px;
}

.floating-badge-2 {
  top: -15px;
  right: -15px;
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: var(--shadow-purple-glow);
  animation-delay: -3s;
}

@keyframes floatBadge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}

/* ==========================================================================
   3. 公司简介 (About Us)
   ========================================================================== */
.about-section {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.4) 50%, transparent 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-lead {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 24px;
  color: var(--text-main);
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 36px;
}

.highlight-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition-normal);
}

.highlight-box:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.highlight-box .icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
  display: inline-block;
}

.highlight-box h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.highlight-box p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.about-card-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.pillar-card {
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.7) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
  opacity: 0.8;
}

.pillar-card:nth-child(2)::before { background: var(--accent-cyan); }
.pillar-card:nth-child(3)::before { background: var(--accent-purple); }
.pillar-card:nth-child(4)::before { background: var(--accent-emerald); }

.pillar-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-light);
}

.pillar-num {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-subtle);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.pillar-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--text-main);
}

.pillar-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   4. 核心业务 (Core Business)
   ========================================================================== */
.business-section {
  position: relative;
}

.business-category-title {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.category-badge {
  font-size: 0.85rem;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-light);
  font-weight: normal;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-bottom: 60px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), var(--shadow-glow);
  background: var(--bg-card-hover);
}

.service-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--text-highlight);
  font-size: 1.5rem;
}

.service-card h3 {
  font-size: 1.28rem;
  margin-bottom: 12px;
  color: var(--text-main);
  font-weight: 700;
}

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

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.service-tag {
  font-size: 0.78rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ==========================================================================
   5. 交互式 AI 方案体验演示看板 (Interactive Showcase)
   ========================================================================== */
.showcase-container {
  background: linear-gradient(145deg, rgba(20, 30, 55, 0.85) 0%, rgba(10, 16, 32, 0.95) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
  margin-top: 40px;
}

.showcase-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.25);
  overflow-x: auto;
}

.showcase-tab-btn {
  flex: 1;
  min-width: 180px;
  padding: 18px 24px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}

.showcase-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}

.showcase-tab-btn.active {
  color: var(--text-highlight);
  background: rgba(14, 165, 233, 0.08);
}

.showcase-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
}

.showcase-panel {
  display: none;
  padding: 40px;
}

.showcase-panel.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.showcase-content-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.demo-feature-list {
  list-style: none;
  margin-top: 20px;
}

.demo-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.98rem;
  color: var(--text-muted);
}

.check-icon {
  color: var(--accent-cyan);
  font-size: 1.1rem;
  margin-top: 2px;
}

.demo-interactive-card {
  background: rgba(10, 15, 30, 0.9);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   6. 公司愿景与核心价值观 (Vision & Mission)
   ========================================================================== */
.vision-section {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.5) 100%);
}

.vision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 60px;
}

.vision-card {
  background: linear-gradient(135deg, rgba(23, 37, 84, 0.4) 0%, rgba(15, 23, 42, 0.7) 100%);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  position: relative;
  overflow: hidden;
}

.vision-card.mission {
  background: linear-gradient(135deg, rgba(88, 28, 135, 0.35) 0%, rgba(15, 23, 42, 0.7) 100%);
  border-color: rgba(139, 92, 246, 0.25);
}

.vision-badge {
  display: inline-flex;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.vision-badge.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.vision-badge.purple {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.vision-card h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
}

.vision-card p {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
}

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

.value-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition-normal);
}

.value-box:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-sm);
}

.value-box .val-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--text-highlight);
}

.value-box h4 {
  font-size: 1.18rem;
  margin-bottom: 10px;
  color: var(--text-main);
}

.value-box p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   7. 发展方向与战略蓝图 (Roadmap & Direction)
   ========================================================================== */
.roadmap-section {
  position: relative;
}

.roadmap-timeline {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 0;
}

.roadmap-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--primary), var(--accent-purple));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 60px;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  padding-right: 50px;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding-left: 50px;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 24px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -9px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
  border-color: var(--accent-purple);
  box-shadow: 0 0 12px var(--accent-purple);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition-normal);
}

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

.timeline-phase {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.timeline-item:nth-child(even) .timeline-phase {
  color: var(--accent-purple);
}

.timeline-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.timeline-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   8. 合作意向与联系我们 (Contact Section)
   ========================================================================== */
.contact-section {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.8) 100%);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 50px;
  box-shadow: var(--shadow-lg);
}

.contact-info h3 {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.contact-info-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.info-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-highlight);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.info-detail h5 {
  font-size: 0.9rem;
  color: var(--text-subtle);
  margin-bottom: 4px;
}

.info-detail p {
  font-size: 1.02rem;
  color: var(--text-main);
  font-weight: 500;
}

/* 合作表单 */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(10, 15, 29, 0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--text-highlight);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
  background: rgba(15, 23, 42, 0.95);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

.form-select option {
  background-color: var(--bg-secondary);
  color: var(--text-main);
}

.form-status-msg {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-status-msg.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.form-status-msg.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* ==========================================================================
   9. 页脚 (Footer)
   ========================================================================== */
.site-footer {
  background: #060911;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-highlight);
  transform: translateX(4px);
  display: inline-block;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* ==========================================================================
   响应式媒体查询 (Responsive Breakpoints)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }
  .hero-content {
    margin: 0 auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-stats {
    max-width: 500px;
    margin: 0 auto;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .contact-wrapper {
    grid-template-columns: 1fr;
    padding: 36px;
  }
  .showcase-content-grid {
    grid-template-columns: 1fr;
  }
  .roadmap-timeline::before {
    left: 20px;
  }
  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 54px !important;
    padding-right: 0 !important;
    text-align: left !important;
  }
  .timeline-dot {
    left: 11px !important;
  }
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 2rem;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .menu-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 30px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .vision-grid {
    grid-template-columns: 1fr;
  }
  .values-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}