/* ==========================================================================
   芯矩慧品牌身份系统样式表 (index.css)
   ========================================================================== */

/* 引入 Google 字体 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  /* 品牌色彩系统 (手册 05 章节) */
  --bg-dark: #0B1026;            /* 深空蓝: 品牌主背景 */
  --bg-dark-accent: #1A2456;     /* 辅助深蓝: 格子填充/线条 */
  --primary-cyan: #00D4FF;       /* 智慧青: 中心点/按钮/高亮 */
  --secondary-purple: #7C3DFF;   /* 启发紫: 渐变辅助/科技氛围 */
  --text-white: #F7FAFF;         /* 少年白: 浅色背景/正文 */
  --text-gray: #8A94A6;          /* 星尘灰: 说明文字/次级标题 */
  --accent-green: #34E89E;       /* 成功/状态绿 */
  --accent-orange: #FFB347;      /* 能量/警告橙 */
  
  /* 渐变方案 */
  --ai-core-gradient: linear-gradient(135deg, var(--primary-cyan) 0%, var(--secondary-purple) 100%);
  --bg-future-gradient: linear-gradient(180deg, #0B1026 0%, #161B3D 50%, #0B1026 100%);
  --glow-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
  
  /* 字体族 */
  --font-zh: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Space Grotesk', 'Inter', sans-serif;
}

/* ==========================================================================
   基础样式与重置
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  background-image: var(--bg-future-gradient);
  color: var(--text-white);
  font-family: var(--font-zh);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* 3x3 矩阵网格暗纹背景 */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(26, 36, 86, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 36, 86, 0.15) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: center top;
  z-index: 0;
  pointer-events: none;
}

/* 动态背景画布 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

/* 科技霓虹光源点缀（背景氛围光） */
.ambient-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 61, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 50%, transparent 100%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

.glow-top-right {
  top: -200px;
  right: -200px;
}

.glow-mid-left {
  top: 1200px;
  left: -300px;
}

.glow-bottom-right {
  bottom: 200px;
  right: -200px;
}

/* ==========================================================================
   排版系统与容器
   ========================================================================== */
h1, h2, h3, h4 {
  font-family: var(--font-zh);
  font-weight: 700;
  letter-spacing: 0.05em;
}

p {
  color: var(--text-gray);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 科技渐变文字 */
.gradient-text {
  background: var(--ai-core-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   导航栏 (Header)
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(11, 16, 38, 0.7);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(26, 36, 86, 0.4);
  z-index: 100;
  transition: all 0.3s ease;
}

.header.scrolled {
  height: 70px;
  background: rgba(11, 16, 38, 0.9);
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

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

.logo-icon {
  width: 44px;
  height: 44px;
}

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

.logo-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.2;
}

.logo-subtitle {
  font-family: var(--font-en);
  font-size: 10px;
  color: var(--primary-cyan);
  letter-spacing: 0.15em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav-links a {
  color: var(--text-gray);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-white);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ai-core-gradient);
  transition: width 0.3s ease;
}

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

.nav-links a.active {
  color: var(--text-white);
}

.nav-cta {
  display: flex;
  align-items: center;
}

/* ==========================================================================
   按钮样式
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  text-decoration: none;
  gap: 8px;
}

/* 智慧青发光主按钮 */
.btn-primary {
  background: var(--ai-core-gradient);
  color: var(--bg-dark);
  border: none;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5), 0 0 10px rgba(124, 61, 255, 0.3);
  color: var(--bg-dark);
}

/* 科技边框次级按钮 */
.btn-secondary {
  background: transparent;
  color: var(--primary-cyan);
  border: 1px solid var(--primary-cyan);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
  color: var(--text-white);
  border-color: var(--text-white);
}

/* 按钮小尺寸 */
.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
  border-radius: 6px;
}

/* ==========================================================================
   Hero 首屏
   ========================================================================== */
.hero {
  min-height: 100vh;
  padding-top: 140px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  width: 100%;
}

.hero-content {
  z-index: 2;
}

.tag-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(26, 36, 86, 0.5);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary-cyan);
  margin-bottom: 24px;
  box-shadow: inset 0 0 10px rgba(0, 212, 255, 0.1);
}

.hero-title {
  font-size: 56px;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--text-white);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-gray);
  margin-bottom: 40px;
  max-width: 580px;
  font-weight: 400;
}

/* 高亮子项目文字 */
.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.feature-tag {
  background: rgba(26, 36, 86, 0.3);
  border: 1px solid rgba(138, 148, 166, 0.2);
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-tag i {
  color: var(--primary-cyan);
}

.hero-actions {
  display: flex;
  gap: 20px;
}

/* Hero 右侧 3D 智慧芯格矩阵 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
}

.matrix-container {
  position: relative;
  width: 360px;
  height: 360px;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
  animation: floatLarge 6s ease-in-out infinite;
}

/* 矩阵环境漫反射光晕 */
.matrix-glow {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, rgba(124, 61, 255, 0.08) 50%, transparent 100%);
  filter: blur(40px);
  z-index: 1;
  pointer-events: none;
}

.matrix-card {
  width: 100%;
  height: 100%;
  background: rgba(26, 36, 86, 0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(180, 215, 255, 0.12);
  border-radius: 32px;
  padding: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
  transform-style: preserve-3d;
  transform: rotateX(16deg) rotateY(-18deg);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.6s ease;
  box-shadow: 
    0 30px 60px rgba(0, 6, 22, 0.5), 
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.matrix-card:hover {
  transform: rotateX(8deg) rotateY(-8deg) scale(1.02);
  box-shadow: 
    0 40px 80px rgba(0, 6, 22, 0.6), 
    0 0 30px rgba(0, 212, 255, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

/* 矩阵背景连线 */
.matrix-lines-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 3x3 模块网格 */
.matrix-grid-3x3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.matrix-cell {
  background: rgba(26, 36, 86, 0.45);
  border: 1.5px solid rgba(26, 36, 86, 0.9);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateZ(10px);
}

/* 中心芯格 */
.matrix-cell.center-cell {
  background: rgba(11, 16, 38, 0.85);
  border-color: rgba(0, 212, 255, 0.45);
  cursor: default;
  transform: translateZ(20px);
}

.center-core-glow {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.35) 0%, transparent 70%);
  filter: blur(5px);
  animation: pulseGlow 3s infinite ease-in-out;
}

.center-core {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ai-core-gradient);
  box-shadow: 0 0 15px var(--primary-cyan);
  z-index: 1;
  animation: pulseGlow 3s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; filter: drop-shadow(0 0 10px var(--primary-cyan)); }
}

/* 外围能力格内部小原点 */
.cell-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(247, 250, 255, 0.4);
  transition: all 0.4s ease;
  box-shadow: 0 0 4px rgba(247, 250, 255, 0.2);
}

.matrix-cell:not(.center-cell):hover,
.matrix-cell.active-cell {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--primary-cyan);
  box-shadow: 
    0 0 15px rgba(0, 212, 255, 0.25), 
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateZ(25px) scale(1.05);
}

.matrix-cell:not(.center-cell):hover .cell-dot,
.matrix-cell.active-cell .cell-dot {
  background: var(--primary-cyan);
  box-shadow: 0 0 10px var(--primary-cyan);
  transform: scale(1.4);
}

/* 漂浮科技感标签 */
.matrix-floating-labels {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 3;
}

.floating-label {
  position: absolute;
  top: var(--top);
  left: var(--left, auto);
  right: var(--right, auto);
  padding: 6px 12px;
  background: rgba(11, 16, 38, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(26, 36, 86, 0.8);
  border-radius: 50px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0;
  transform: translateZ(15px) scale(0.85);
  transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.floating-label.active {
  opacity: 0.75;
  transform: translateZ(15px) scale(1);
}

.floating-label.highlighted {
  opacity: 1;
  border-color: var(--primary-cyan);
  color: var(--text-white);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
  transform: translateZ(30px) scale(1.1);
}

.floating-label i {
  color: var(--primary-cyan);
}

/* 浮动动画 */
@keyframes floatLarge {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0px); }
}

/* ==========================================================================
   品牌理念区 (Philosophy) - 3x3 交互式面板
   ========================================================================== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px auto;
}

.section-label {
  font-family: var(--font-en);
  font-size: 14px;
  color: var(--primary-cyan);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 38px;
  margin-bottom: 20px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-gray);
}

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

/* 交互式 3x3 矩阵盒子 */
.matrix-interactive-box {
  background: rgba(26, 36, 86, 0.2);
  border: 1px solid rgba(26, 36, 86, 0.6);
  border-radius: 24px;
  padding: 30px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
}

.grid-3x3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  width: 300px;
  height: 300px;
}

.grid-cell {
  background: rgba(26, 36, 86, 0.3);
  border: 2px solid rgba(26, 36, 86, 0.8);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-gray);
}

/* 中心芯格 */
.grid-cell.center-cell {
  background: rgba(124, 61, 255, 0.1);
  border-color: rgba(124, 61, 255, 0.4);
  cursor: default;
}

.center-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ai-core-gradient);
  box-shadow: 0 0 15px var(--primary-cyan);
  animation: pulseCore 2s infinite ease-in-out;
}

@keyframes pulseCore {
  0% { transform: scale(0.9); box-shadow: 0 0 10px var(--primary-cyan); }
  50% { transform: scale(1.2); box-shadow: 0 0 25px var(--primary-cyan), 0 0 10px var(--secondary-purple); }
  100% { transform: scale(0.9); box-shadow: 0 0 10px var(--primary-cyan); }
}

/* 鼠标悬停在普通网格上 */
.grid-cell:not(.center-cell):hover,
.grid-cell.active-cell {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--primary-cyan);
  color: var(--text-white);
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

/* 核心能力信息卡片展示 */
.philosophy-info {
  background: rgba(26, 36, 86, 0.15);
  border: 1px solid rgba(26, 36, 86, 0.4);
  border-radius: 20px;
  padding: 40px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: inset 0 0 20px rgba(0, 212, 255, 0.02);
}

.philosophy-detail h3 {
  font-size: 26px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.philosophy-detail h3 i {
  color: var(--primary-cyan);
}

.philosophy-detail p {
  font-size: 16px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 24px;
}

.philosophy-quote {
  border-left: 3px solid var(--secondary-purple);
  padding-left: 16px;
  font-style: italic;
  font-size: 14px;
  color: var(--primary-cyan);
}

/* ==========================================================================
   课程体系 (Curriculum Section)
   ========================================================================== */
.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.curriculum-card {
  background: rgba(26, 36, 86, 0.15);
  border: 1px solid rgba(26, 36, 86, 0.5);
  border-radius: 16px;
  padding: 30px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 260px;
}

.curriculum-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  transition: background 0.3s ease;
}

.curriculum-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 
    0 12px 30px rgba(0, 0, 0, 0.4),
    0 0 15px rgba(124, 61, 255, 0.1);
  background: rgba(26, 36, 86, 0.25);
}

.curriculum-card:hover::before {
  background: var(--ai-core-gradient);
}

.curriculum-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.curriculum-index {
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--primary-cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 600;
}

.curriculum-icon {
  font-size: 24px;
  color: var(--text-white);
  opacity: 0.8;
  transition: transform 0.3s ease;
}

.curriculum-card:hover .curriculum-icon {
  transform: scale(1.15) rotate(5deg);
  color: var(--primary-cyan);
}

.curriculum-title {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text-white);
}

.curriculum-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.5;
  margin-bottom: 20px;
}

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

.curriculum-tag {
  font-size: 11px;
  padding: 3px 8px;
  background: rgba(11, 16, 38, 0.4);
  border-radius: 4px;
  color: var(--text-gray);
}

/* ==========================================================================
   AI 互动体验中心 (AI Playground)
   ========================================================================== */
.playground-box {
  background: rgba(26, 36, 86, 0.15);
  border: 1px solid rgba(26, 36, 86, 0.6);
  border-radius: 24px;
  padding: 40px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  position: relative;
}

.playground-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.ai-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.control-instruction {
  font-size: 15px;
  color: var(--text-gray);
  margin-bottom: 8px;
}

.object-selector {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.selector-btn {
  background: rgba(26, 36, 86, 0.4);
  border: 1px solid rgba(26, 36, 86, 0.9);
  padding: 16px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  text-align: left;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  color: var(--text-gray);
}

.selector-btn:hover {
  background: rgba(26, 36, 86, 0.7);
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--text-white);
}

.selector-btn.active {
  background: rgba(124, 61, 255, 0.15);
  border-color: var(--primary-cyan);
  color: var(--text-white);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
}

.selector-btn-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(11, 16, 38, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-white);
  transition: all 0.3s ease;
}

.selector-btn.active .selector-btn-icon {
  background: var(--ai-core-gradient);
  color: var(--bg-dark);
}

.selector-btn-text h4 {
  font-size: 16px;
  margin-bottom: 2px;
}

.selector-btn-text p {
  font-size: 12px;
}

/* AI 物理实体仿真屏幕 */
.simulation-screen {
  width: 100%;
  height: 145px;
  background: #03050d;
  border: 1.5px solid rgba(26, 36, 86, 0.8);
  border-radius: 16px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 25px rgba(0,0,0,0.85), 0 0 10px rgba(0, 212, 255, 0.05);
}

.simulation-screen::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    rgba(255, 255, 255, 0.01) 0px,
    rgba(255, 255, 255, 0.01) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
  z-index: 5;
}

.sim-svg {
  width: 100%;
  height: 100%;
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
}

.sim-svg.active-sim {
  display: block;
}

/* 仿真元素过渡效果 */
#sim-car-group,
#sim-car-radar,
#sim-car-obstacle,
#sim-car-obstacle-glow,
#sim-arm-box,
#sim-arm-body,
#sim-garbage-item,
#sim-garbage-scan {
  transition: all 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

/* AI 神经网络推理可视化板 */
.ai-visualizer {
  border-left: 1px solid rgba(26, 36, 86, 0.6);
  padding-left: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 380px;
  position: relative;
  justify-content: space-between;
}

.inference-steps {
  display: flex;
  justify-content: space-between;
  width: 100%;
  position: relative;
  margin-bottom: 30px;
}

/* 连线通道线 */
.inference-steps::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 10%;
  width: 80%;
  height: 2px;
  background: rgba(26, 36, 86, 0.5);
  z-index: 1;
}

.inference-step-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 25%;
  z-index: 2;
  position: relative;
}

.node-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 2px solid var(--bg-dark-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-gray);
  transition: all 0.5s ease;
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.inference-step-node.active .node-circle {
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
  background: rgba(0, 212, 255, 0.05);
}

.inference-step-node.active.completed .node-circle {
  border-color: var(--accent-green);
  color: var(--accent-green);
  box-shadow: 0 0 20px rgba(52, 232, 158, 0.4);
  background: rgba(52, 232, 158, 0.05);
}

.node-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-gray);
  transition: color 0.5s ease;
}

.inference-step-node.active .node-label {
  color: var(--text-white);
}

/* 推理结果面板 */
.inference-result-panel {
  background: rgba(11, 16, 38, 0.5);
  border: 1px solid rgba(26, 36, 86, 0.8);
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
  overflow: hidden;
}

/* 流光背景动画 */
.inference-result-panel::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(124, 61, 255, 0.05) 0%, transparent 70%);
  z-index: 1;
}

.result-graphic-container {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  position: relative;
}

.result-3x3-svg {
  width: 100%;
  height: 100%;
}

.result-info-box {
  flex: 1;
  z-index: 2;
}

.result-info-status {
  font-size: 12px;
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.result-info-name {
  font-size: 22px;
  color: var(--text-white);
  margin-bottom: 8px;
}

.result-probability-bar {
  height: 6px;
  background: rgba(26, 36, 86, 0.8);
  border-radius: 3px;
  width: 100%;
  overflow: hidden;
}

.probability-bar-fill {
  height: 100%;
  background: var(--ai-core-gradient);
  width: 0%;
  border-radius: 3px;
  transition: width 1s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.result-percentage {
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--primary-cyan);
  font-weight: 700;
  text-align: right;
  margin-top: 4px;
}

/* ==========================================================================
   学生作品展示 (Projects Section)
   ========================================================================== */
.projects-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.project-card {
  background: rgba(26, 36, 86, 0.15);
  border: 1px solid rgba(26, 36, 86, 0.4);
  border-radius: 20px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  transition: all 0.4s ease;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.project-image-container {
  height: 240px;
  background: #111633;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid rgba(26, 36, 86, 0.4);
}

/* 科技网格粒子动效背景 */
.project-image-ambient {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0.15;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.3) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* 核心模拟展示 */
.project-sim-device {
  width: 80%;
  height: 75%;
  background: #060918;
  border: 2px solid var(--bg-dark-accent);
  border-radius: 10px;
  position: relative;
  z-index: 2;
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sim-header {
  height: 24px;
  background: #101530;
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
  border-bottom: 1px solid rgba(26, 36, 86, 0.4);
}

.sim-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #8A94A6;
}

.sim-dot.red { background: #ff5f56; }
.sim-dot.yellow { background: #ffbd2e; }
.sim-dot.green { background: #27c93f; }

.sim-body {
  flex: 1;
  padding: 12px;
  display: flex;
  gap: 12px;
}

.sim-camera {
  flex: 0.9;
  background: rgba(26, 36, 86, 0.3);
  border: 1px solid rgba(26, 36, 86, 0.8);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  position: relative;
}

/* 摄像头扫描线 */
.sim-camera-scan {
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--primary-cyan);
  box-shadow: 0 0 8px var(--primary-cyan);
  left: 0;
  top: 0;
  animation: scanLine 2s infinite ease-in-out;
}

@keyframes scanLine {
  0% { top: 0%; }
  50% { top: 100%; }
  100% { top: 0%; }
}

.sim-data {
  flex: 1.1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sim-console {
  background: #03050f;
  border-radius: 4px;
  padding: 8px;
  font-family: monospace;
  font-size: 10px;
  flex: 1;
  color: var(--accent-green);
  overflow: hidden;
}

.sim-chart {
  height: 40px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  border-bottom: 1px solid rgba(26, 36, 86, 0.6);
  padding-bottom: 2px;
}

.sim-chart-bar {
  flex: 1;
  background: rgba(124, 61, 255, 0.4);
  border-radius: 2px 2px 0 0;
  height: 10%;
  transition: height 0.5s ease;
}

.sim-chart-bar.active {
  background: var(--ai-core-gradient);
}

.project-details {
  padding: 30px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.project-badge {
  font-size: 12px;
  color: var(--primary-cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.project-title {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--text-white);
}

.project-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-author {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(26, 36, 86, 0.4);
  padding-top: 16px;
  margin-top: auto;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--ai-core-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--bg-dark);
}

.author-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-white);
}

.author-age {
  font-size: 12px;
  color: var(--text-gray);
}

/* ==========================================================================
   未来课堂与学习路径 (Classroom & Path Section)
   ========================================================================== */
.path-grid-custom {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.path-card-custom {
  background: rgba(26, 36, 86, 0.15);
  border: 1px solid rgba(26, 36, 86, 0.5);
  border-radius: 16px;
  padding: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}

.path-card-custom:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  background: rgba(26, 36, 86, 0.25);
}

.path-number {
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--primary-cyan);
  background: rgba(0, 212, 255, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  font-weight: 600;
  margin-bottom: 16px;
}

.path-card-custom h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--text-white);
}

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

/* 下半部分布局 */
.classroom-showcase-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

/* 课堂图片容器 */
.classroom-image-wrap {
  position: relative;
  width: 100%;
}

.classroom-image-glow {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  border-radius: 24px;
  background: radial-gradient(circle, rgba(124, 61, 255, 0.1) 0%, transparent 60%);
  filter: blur(20px);
  z-index: 1;
  pointer-events: none;
}

.classroom-image-card {
  position: relative;
  background: rgba(26, 36, 86, 0.2);
  border: 1px solid rgba(26, 36, 86, 0.6);
  border-radius: 24px;
  padding: 10px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

.slideshow-container {
  position: relative;
  width: 100%;
  aspect-ratio: 1.6 / 1;
  overflow: hidden;
  border-radius: 16px;
}

.classroom-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
  display: block;
  opacity: 0;
  transition: opacity 0.8s ease-in-out, transform 0.8s ease;
  z-index: 1;
}

.classroom-img.active-slide {
  opacity: 1;
  z-index: 2;
}

.classroom-image-card:hover .classroom-img.active-slide {
  transform: scale(1.03);
}

.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all 0.3s ease;
}

.slider-dot.active {
  background: var(--primary-cyan);
  box-shadow: 0 0 6px var(--primary-cyan);
  width: 16px;
  border-radius: 4px;
}

.classroom-image-overlay {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  background: rgba(11, 16, 38, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(180, 215, 255, 0.1);
  padding: 16px 20px;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.classroom-image-overlay h4 {
  font-size: 15px;
  color: var(--text-white);
  margin-bottom: 4px;
}

.classroom-image-overlay p {
  font-size: 12px;
  color: var(--primary-cyan);
}

.classroom-image-overlay p i {
  margin-right: 4px;
}

/* 家长关心点 */
.parents-trust-wrap {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.trust-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(52, 232, 158, 0.1);
  border: 1px solid rgba(52, 232, 158, 0.2);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-green);
  align-self: flex-start;
}

.trust-header h3 {
  font-size: 28px;
  line-height: 1.3;
}

.trust-items-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.trust-item {
  display: flex;
  gap: 16px;
  background: rgba(26, 36, 86, 0.1);
  border: 1px solid rgba(26, 36, 86, 0.4);
  border-radius: 16px;
  padding: 16px 20px;
  transition: all 0.3s ease;
}

.trust-item:hover {
  background: rgba(26, 36, 86, 0.2);
  border-color: rgba(52, 232, 158, 0.25);
  transform: translateX(4px);
}

.trust-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--primary-cyan);
  flex-shrink: 0;
  margin-top: 2px;
}

.trust-item:hover .trust-icon {
  background: var(--ai-core-gradient);
  color: var(--bg-dark);
}

.trust-text h4 {
  font-size: 15px;
  color: var(--text-white);
  margin-bottom: 6px;
}

.trust-text p {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.5;
}

/* ==========================================================================
   预约表单区 (Form Section)
   ========================================================================== */
.form-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.form-info-wrap h2 {
  font-size: 38px;
  line-height: 1.3;
  margin-bottom: 24px;
}

.form-benefits {
  list-style: none;
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-benefits li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-gray);
  font-size: 15px;
}

.form-benefits li i {
  color: var(--accent-green);
  font-size: 18px;
}

.booking-form-box {
  background: rgba(26, 36, 86, 0.2);
  border: 1px solid rgba(26, 36, 86, 0.7);
  border-radius: 24px;
  padding: 40px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-white);
}

.form-group input,
.form-group select {
  background: rgba(11, 16, 38, 0.5);
  border: 1px solid rgba(26, 36, 86, 0.8);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 15px;
  color: var(--text-white);
  font-family: var(--font-zh);
  outline: none;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary-cyan);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
}

.form-group select option {
  background: var(--bg-dark);
  color: var(--text-white);
}

/* ==========================================================================
   成功弹窗 (Success Modal)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(6, 9, 24, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: rgba(26, 36, 86, 0.4);
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 24px;
  width: 90%;
  max-width: 460px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 15px 50px rgba(0,0,0,0.6), 0 0 30px rgba(0, 212, 255, 0.15);
  transform: scale(0.85);
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(52, 232, 158, 0.1);
  border: 2px solid var(--accent-green);
  color: var(--accent-green);
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
  box-shadow: 0 0 20px rgba(52, 232, 158, 0.2);
}

.modal-title {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--text-white);
}

.modal-desc {
  font-size: 14px;
  color: var(--text-gray);
  margin-bottom: 30px;
  line-height: 1.6;
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.footer {
  background: #060918;
  border-top: 1px solid rgba(26, 36, 86, 0.5);
  padding: 60px 0 30px 0;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand p {
  font-size: 14px;
  max-width: 280px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-nav h4 {
  font-size: 16px;
  color: var(--text-white);
}

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

.footer-nav a {
  font-size: 14px;
  color: var(--text-gray);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: var(--primary-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(26, 36, 86, 0.4);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-gray);
}

.footer-social {
  display: flex;
  gap: 16px;
}

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(26, 36, 86, 0.3);
  border: 1px solid rgba(26, 36, 86, 0.8);
  color: var(--text-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 16px;
  transition: all 0.3s ease;
}

.social-icon:hover {
  color: var(--primary-cyan);
  border-color: var(--primary-cyan);
  background: rgba(0, 212, 255, 0.05);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
}

/* ==========================================================================
   响应式适配 (Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 46px;
  }
  .philosophy-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .playground-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .ai-visualizer {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid rgba(26, 36, 86, 0.6);
    padding-top: 40px;
  }
  .form-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .path-grid-custom {
    grid-template-columns: repeat(2, 1fr);
  }
  .classroom-showcase-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .header {
    height: 70px;
  }
  .header .btn-cta {
    display: none; /* 移动端隐藏顶部 CTA */
  }
  .nav-links {
    display: none; /* 后续可用 JS 控制移动端汉堡菜单，此处简略 */
  }
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero-title {
    font-size: 36px;
  }
  .hero-actions {
    justify-content: center;
  }
  .curriculum-grid {
    grid-template-columns: 1fr;
  }
  .projects-layout {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .path-grid-custom {
    grid-template-columns: 1fr;
  }
}