/* ========================================
   立信科技官网 - 全局样式表
   设计风格：专业商务 + 科技感 + 新能源绿色
   主色调：深蓝色(#0F2948) + 绿色系 + 科技蓝
   ======================================== */

/* -------------------- CSS 变量系统 -------------------- */
:root {
  /* 主色系 */
  --primary-dark: #0F2948;
  --primary: #1a3a5c;
  --primary-light: #2a4a6c;
  
  /* 科技蓝 */
  --accent: #00d4ff;
  --accent-light: #4de8ff;
  --accent-dark: #00a8cc;
  
  /* 新能源绿色系 */
  --green: #00c853;
  --green-light: #5efc82;
  --green-dark: #009624;
  --gradient-green: linear-gradient(135deg, #00c853 0%, #00a843 100%);
  
  /* 太阳能黄色 */
  --yellow: #ffc107;
  --yellow-light: #fff350;
  --yellow-dark: #c79100;
  
  /* 灰色系 */
  --gray-900: #1a1a1a;
  --gray-800: #333333;
  --gray-700: #4a4a4a;
  --gray-600: #666666;
  --gray-500: #888888;
  --gray-400: #aaaaaa;
  --gray-300: #cccccc;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --white: #ffffff;
  
  /* 功能色 */
  --success: #00c853;
  --warning: #ffc107;
  --error: #ff5252;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #0F2948 0%, #1a3a5c 50%, #0a1f38 100%);
  --gradient-accent: linear-gradient(90deg, #00d4ff 0%, #00a8cc 100%);
  --gradient-hero: linear-gradient(180deg, rgba(15, 41, 72, 0.98) 0%, rgba(10, 31, 56, 0.95) 100%);
  --gradient-energy: linear-gradient(135deg, rgba(0, 200, 83, 0.1) 0%, rgba(0, 212, 255, 0.1) 100%);
  
  /* 字体系统 */
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Roboto Mono', 'Consolas', monospace;
  
  /* 字号梯度 */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;
  --text-5xl: 48px;
  --text-6xl: 60px;
  
  /* 行高 */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* 间距系统 (8px 基准) */
  --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;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
  --shadow-glow-green: 0 0 30px rgba(0, 200, 83, 0.3);
  
  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 布局 */
  --container-max: 1200px;
  --header-height: 80px;
  --header-height-mobile: 60px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-cn);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--gray-800);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

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

/* -------------------- 通用工具类 -------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--primary-dark);
  text-align: center;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--gray-600);
  text-align: center;
  margin-bottom: var(--space-12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  min-height: 48px;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

/* -------------------- 导航栏 -------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(15, 41, 72, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

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

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary-dark);
  font-size: var(--text-lg);
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.logo-icon:has(img) {
  background: transparent;
  padding: 4px;
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--white);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

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

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

.nav-cta {
  background: var(--gradient-accent);
  color: var(--primary-dark);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-base);
}

.nav-cta:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-2);
  cursor: pointer;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* -------------------- Hero 区 - 新能源主题 -------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-primary);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* 动态网格背景 */
.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px),
    linear-gradient(rgba(0, 200, 83, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 200, 83, 0.015) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 50px 50px, 50px 50px;
  animation: gridMove 30s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(100px, 100px); }
}

/* 能源粒子效果 */
.energy-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.6;
  animation: particleFloat 15s infinite ease-in-out;
}

.particle-1 { left: 10%; top: 20%; animation-delay: 0s; background: var(--green); }
.particle-2 { left: 30%; top: 60%; animation-delay: -3s; background: var(--accent); }
.particle-3 { left: 50%; top: 30%; animation-delay: -6s; background: var(--yellow); }
.particle-4 { left: 70%; top: 70%; animation-delay: -9s; background: var(--green); }
.particle-5 { left: 85%; top: 40%; animation-delay: -12s; background: var(--accent); }
.particle-6 { left: 20%; top: 80%; animation-delay: -15s; background: var(--yellow); }

@keyframes particleFloat {
  0%, 100% { 
    transform: translateY(0) scale(1); 
    opacity: 0.6;
  }
  25% {
    transform: translateY(-100px) scale(1.5);
    opacity: 0.8;
  }
  50% { 
    transform: translateY(-50px) scale(1); 
    opacity: 0.4;
  }
  75% {
    transform: translateY(-150px) scale(1.2);
    opacity: 0.7;
  }
}

/* 光晕效果 */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  animation: float 10s ease-in-out infinite;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -100px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, transparent 70%);
}

.hero-glow-2 {
  width: 500px;
  height: 500px;
  bottom: -150px;
  left: -100px;
  background: radial-gradient(circle, rgba(0, 200, 83, 0.1) 0%, transparent 70%);
  animation-delay: -5s;
}

.hero-glow-3 {
  width: 400px;
  height: 400px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 193, 7, 0.08) 0%, transparent 70%);
  animation-delay: -2.5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

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

.hero-text {
  color: var(--white);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(0, 200, 83, 0.1);
  border: 1px solid rgba(0, 200, 83, 0.3);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--green-light);
  margin-bottom: var(--space-6);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Hero主标题 - 智慧能源综合解决方案服务商（绿色矩形标签） */
.hero-title {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(0, 200, 83, 0.15);
  border: 1px solid rgba(0, 200, 83, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--green-light);
  margin-bottom: var(--space-6);
}

.hero-title::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

/* Hero副标题 - 绿色能源驱动未来 / 智慧系统赋能产业（大标题） */
.hero-subtitle {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  color: var(--white);
}

.hero-subtitle .highlight {
  color: var(--accent);
  position: relative;
}

.hero-subtitle .highlight-green {
  color: var(--green);
  position: relative;
}

/* 确保内联样式颜色优先级更高 */
.hero-subtitle * {
  color: inherit;
}

.hero-subtitle br {
  display: block;
  content: "";
  margin-top: 0.5em;
}

.hero-desc {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex !important;
  gap: var(--space-10);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  visibility: visible !important;
  opacity: 1 !important;
  min-height: 60px; /* 确保有足够高度显示内容 */
  position: relative !important;
  z-index: 10 !important; /* 确保在背景之上 */
  width: 100%;
}

.stat-item {
  text-align: left;
  position: relative;
  z-index: 1;
  opacity: 1 !important;
  visibility: visible !important;
}

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--accent) !important;
  font-family: var(--font-en);
  display: flex;
  align-items: baseline;
  opacity: 1 !important;
  visibility: visible !important;
}

.stat-unit {
  font-size: var(--text-xl);
  margin-left: 2px;
  color: var(--green);
}

.stat-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8) !important;
  margin-top: var(--space-1);
  opacity: 1 !important;
  visibility: visible !important;
}

/* Hero 右侧 - 能源生态系统 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-main {
  position: relative;
  width: 100%;
  max-width: 450px;
  height: 450px;
}

/* 能源生态系统 */
.energy-ecosystem {
  position: relative;
  width: 100%;
  height: 100%;
}

.eco-connections {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* 中心节点 */
.eco-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  background: rgba(0, 212, 255, 0.1);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  animation: centerPulse 3s ease-in-out infinite;
}

@keyframes centerPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.3); }
  50% { box-shadow: 0 0 0 20px rgba(0, 212, 255, 0); }
}

.eco-center-icon {
  width: 40px;
  height: 40px;
}

.eco-center-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--accent);
}

.eco-center-text {
  font-size: var(--text-xs);
  color: var(--accent);
  margin-top: var(--space-1);
  font-weight: 600;
}

/* 环绕节点 */
.eco-node {
  position: absolute;
  width: 70px;
  height: 70px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  z-index: 5;
}

.eco-node:hover {
  background: rgba(0, 200, 83, 0.2);
  border-color: var(--green);
  transform: scale(1.1);
}

.eco-node-icon {
  width: 28px;
  height: 28px;
}

.eco-node-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--green);
}

.eco-node-text {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 4px;
  white-space: nowrap;
}

/* 节点位置 - 五边形分布 */
.eco-node-1 { top: 10%; left: 50%; transform: translateX(-50%); }
.eco-node-2 { top: 30%; right: 5%; }
.eco-node-3 { top: 70%; right: 10%; }
.eco-node-4 { top: 70%; left: 10%; }
.eco-node-5 { top: 30%; left: 5%; }

/* 能量流动线条动画 */
.energy-flow {
  stroke-dasharray: 10 5;
  animation: flowDash 2s linear infinite;
}

.flow-1 { animation-delay: 0s; }
.flow-2 { animation-delay: -0.4s; }
.flow-3 { animation-delay: -0.8s; }
.flow-4 { animation-delay: -1.2s; }
.flow-5 { animation-delay: -1.6s; }

@keyframes flowDash {
  0% { stroke-dashoffset: 30; }
  100% { stroke-dashoffset: 0; }
}

/* 浮动数据卡片 */
.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: floatCard 6s ease-in-out infinite;
  z-index: 20;
}

.float-card-1 { top: 5%; right: -10%; animation-delay: 0s; }
.float-card-2 { bottom: 25%; left: -15%; animation-delay: -2s; }
.float-card-3 { top: 35%; right: -20%; animation-delay: -4s; }

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-card-icon.green { background: rgba(0, 200, 83, 0.2); }
.float-card-icon.blue { background: rgba(0, 212, 255, 0.2); }
.float-card-icon.yellow { background: rgba(255, 193, 7, 0.2); }

.float-card-icon svg {
  width: 20px;
  height: 20px;
}

.float-card-icon.green svg { stroke: var(--green); }
.float-card-icon.blue svg { stroke: var(--accent); }
.float-card-icon.yellow svg { stroke: var(--yellow); }

.float-card-content {
  display: flex;
  flex-direction: column;
}

.float-card-value {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--white);
  font-family: var(--font-en);
}

.float-card-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.6);
}

/* 滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  position: relative;
}

.scroll-dot {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: var(--radius-full);
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 20px; opacity: 0.3; }
}

/* -------------------- 六大业务板块 -------------------- */
.business {
  background: var(--white);
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.business::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.05;
  z-index: 0;
  pointer-events: none;
}

.business .container {
  position: relative;
  z-index: 1;
  width: 100%;
}

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

.business-card {
  background: var(--gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.business-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent);
  background: var(--white);
}

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

.business-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.1) 0%, rgba(0, 212, 255, 0.1) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.business-card:hover .business-icon {
  background: var(--gradient-accent);
}

.business-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--primary-dark);
  transition: stroke var(--transition-base);
}

.business-card:hover .business-icon svg {
  stroke: var(--primary-dark);
}

.business-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--space-3);
}

.business-desc {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.business-features {
  margin-bottom: var(--space-6);
}

.business-features li {
  font-size: var(--text-sm);
  color: var(--gray-700);
  padding: var(--space-2) 0;
  padding-left: var(--space-5);
  position: relative;
}

.business-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
}

.business-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.business-link:hover {
  color: var(--accent);
  gap: var(--space-3);
}

/* -------------------- 核心优势板块 -------------------- */
.advantages {
  /* background: var(--gray-100); 移除默认背景，让后台配置的背景图生效 */
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

.advantages .container {
  width: 100%;
}

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

.advantage-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid var(--gray-200);
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--green);
}

.advantage-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-6);
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.1) 0%, rgba(0, 212, 255, 0.1) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.advantage-card:hover .advantage-icon {
  background: var(--gradient-green);
}

.advantage-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--primary-dark);
  transition: stroke var(--transition-base);
}

.advantage-card:hover .advantage-icon svg {
  stroke: var(--white);
}

.advantage-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--space-3);
}

.advantage-desc {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.advantage-data-wrapper {
  margin-top: var(--space-4);
}

.advantage-data {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--green-dark);
  font-family: var(--font-en);
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

.advantage-data-label {
  font-size: var(--text-xs);
  color: var(--gray-500);
  margin-top: var(--space-1);
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

/* -------------------- 解决方案板块 -------------------- */
.solutions {
  background: var(--primary-dark);
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.solutions .container {
  width: 100%;
  position: relative;
  z-index: 1;
}

.solutions::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(0, 200, 83, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%);
}

.solutions .section-title,
.solutions .section-subtitle {
  color: var(--white);
}

.solutions .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  position: relative;
  z-index: 1;
}

.solution-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.solution-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--green);
  transform: translateY(-5px);
}

.solution-icon {
  width: 56px;
  height: 56px;
  background: rgba(0, 200, 83, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.solution-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--green);
}

.solution-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(0, 200, 83, 0.2);
  color: var(--green-light);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.solution-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-3);
}

.solution-pain {
  font-size: var(--text-sm);
  color: var(--green-light);
  margin-bottom: var(--space-3);
}

.solution-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.solution-benefits {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 var(--space-6) 0;
}

.solution-benefits li {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
  padding-left: var(--space-6);
  position: relative;
}

.solution-benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green-light);
  font-weight: 700;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.solution-link:hover {
  gap: var(--space-3);
  color: var(--green-light);
}

.solution-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

/* -------------------- 成功案例板块 -------------------- */
.cases {
  background: var(--gray-100);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.cases .container {
  width: 100%;
}

.cases-carousel {
  position: relative;
  overflow: hidden;
}

.cases-track {
  display: flex;
  gap: var(--space-6);
  transition: transform var(--transition-slow);
}

.case-card {
  flex: 0 0 calc(33.333% - var(--space-4));
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.case-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-5px);
}

.case-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
}

.case-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.1) 100%);
  z-index: 1;
}

.case-logo {
  width: 80px;
  height: 80px;
  background: var(--white);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary-dark);
}

.case-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: var(--green);
  color: var(--white);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.case-content {
  padding: var(--space-6);
}

.case-industry {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.case-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--space-3);
}

.case-result {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.case-metrics {
  display: flex;
  gap: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-200);
}

.case-metric {
  text-align: center;
}

.case-metric-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--green-dark);
  font-family: var(--font-en);
}

.case-metric-label {
  font-size: var(--text-xs);
  color: var(--gray-500);
}

/* 轮播控制 */
.cases-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.cases-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  cursor: pointer;
}

.cases-btn:hover {
  background: var(--green);
  border-color: var(--green);
  color: var(--white);
}

.cases-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.cases-dots {
  display: flex;
  gap: var(--space-2);
}

.cases-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-300);
  cursor: pointer;
  transition: all var(--transition-base);
}

.cases-dot.active {
  background: var(--green);
  width: 32px;
  border-radius: var(--radius-full);
}

/* -------------------- 技术实力板块 -------------------- */
.tech {
  background: var(--white);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.tech .container {
  width: 100%;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.tech-stat {
  text-align: center;
  padding: var(--space-8);
  background: var(--gray-100);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.tech-stat:hover {
  background: var(--primary-dark);
}

.tech-stat:hover .tech-stat-number,
.tech-stat:hover .tech-stat-label {
  color: var(--white);
}

.tech-stat:hover .tech-stat-number {
  color: var(--green);
}

.tech-stat-number {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--primary-dark);
  font-family: var(--font-en);
  line-height: 1;
  margin-bottom: var(--space-2);
  transition: color var(--transition-base);
}

.tech-stat-label {
  font-size: var(--text-base);
  color: var(--gray-600);
  transition: color var(--transition-base);
}

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

.tech-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.tech-feature:hover {
  box-shadow: var(--shadow-md);
}

.tech-feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-dark);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tech-feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--green);
}

.tech-feature-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--space-2);
}

.tech-feature-desc {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: var(--leading-relaxed);
}

/* -------------------- 页脚 -------------------- */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary-dark);
  font-size: var(--text-lg);
  overflow: hidden;
  flex-shrink: 0;
}

.footer-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.footer-logo-icon:has(img) {
  background: transparent;
  padding: 4px;
}

.footer-logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
}

.footer-desc {
  font-size: var(--text-sm);
  color: var(--gray-400);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social-link {
  width: 40px;
  height: 40px;
  background: var(--gray-800);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.footer-social-link:hover {
  background: var(--green);
}

.footer-social-link svg {
  width: 20px;
  height: 20px;
  fill: var(--white);
}

.footer-social-link:hover svg {
  fill: var(--white);
}

/* Font Awesome 图标样式 */
.footer-social-link .fab,
.footer-social-link .fas {
  font-size: 20px;
  color: var(--white);
  transition: color var(--transition-base);
}

.footer-social-link:hover .fab,
.footer-social-link:hover .fas {
  color: var(--white);
}

.footer-column-title {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--green);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-contact-icon {
  width: 20px;
  height: 20px;
  stroke: var(--green);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-text {
  font-size: var(--text-sm);
  color: var(--gray-400);
}

.footer-contact-text strong {
  display: block;
  color: var(--white);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--gray-500);
}

/* 微信二维码弹窗 */
.wechat-qrcode-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wechat-qrcode-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.wechat-qrcode-content {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 0;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  z-index: 1;
  animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.wechat-qrcode-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.wechat-qrcode-header h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary-dark);
}

.wechat-qrcode-close {
  background: none;
  border: none;
  font-size: 28px;
  color: var(--gray-400);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.wechat-qrcode-close:hover {
  background: var(--gray-100);
  color: var(--primary-dark);
}

.wechat-qrcode-body {
  padding: 40px;
  text-align: center;
}

.wechat-qrcode-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.wechat-qrcode-body p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--gray-600);
}

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

.footer-legal-link {
  font-size: var(--text-sm);
  color: var(--gray-500);
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: var(--green);
}

/* -------------------- 响应式适配 -------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  
  .case-card {
    flex: 0 0 calc(50% - var(--space-3));
  }
  
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tech-features {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: var(--header-height-mobile);
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height-mobile);
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - var(--header-height-mobile));
    background: var(--primary-dark);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    gap: var(--space-1);
    transition: right var(--transition-base);
  }
  
  .nav-menu.active {
    right: 0;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
  }
  
  .nav-link {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }
  
  .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
  }
  
  .nav-link::after {
    display: none;
  }
  
  .nav-cta {
    margin-top: var(--space-4);
    text-align: center;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .section {
    padding: var(--space-16) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .hero {
    padding-top: var(--header-height-mobile);
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-desc {
    font-size: var(--text-base);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-6);
    align-items: center;
  }
  
  .stat-item {
    text-align: center;
  }
  
  .hero-scroll {
    display: none;
  }
  
  .business-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .case-card {
    flex: 0 0 calc(100% - var(--space-6));
  }
  
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
  
  .tech-stat {
    padding: var(--space-6);
  }
  
  .tech-stat-number {
    font-size: var(--text-3xl);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* -------------------- 动画类 -------------------- */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

/* 强制显示类 - 用于动态生成的内容 */
.force-visible {
  opacity: 1 !important;
  visibility: visible !important;
  display: block !important;
  transform: translateY(0) !important;
}

[data-aos="fade-up"] {
  transform: translateY(30px);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos="zoom-in"] {
  transform: scale(0.9);
}

/* 延迟动画 */
[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="150"] { transition-delay: 0.15s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="250"] { transition-delay: 0.25s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos-delay="350"] { transition-delay: 0.35s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }