/* ========================================
   杭州萧山慕蕾贸易商行 - 企业官网样式
   ======================================== */

/* CSS 变量定义 */
:root {
    /* 主色调 - 深邃科技蓝 */
    --primary-900: #0c1929;
    --primary-800: #132337;
    --primary-700: #1a3049;
    --primary-600: #234263;
    --primary-500: #2d5a8a;
    --primary-400: #4a7ab0;
    --primary-300: #6b9bd4;
    --primary-200: #a3c4e8;
    --primary-100: #d4e5f7;
    --primary-50: #eef5fc;
    
    /* 强调色 - 活力橙 */
    --accent-600: #c2410c;
    --accent-500: #ea580c;
    --accent-400: #f97316;
    --accent-300: #fb923c;
    --accent-200: #fdba74;
    --accent-100: #fed7aa;
    
    /* 中性色 */
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    
    /* 功能色 */
    --white: #ffffff;
    --black: #000000;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 字体 */
    --font-display: 'Outfit', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', 'Outfit', sans-serif;
    
    /* 间距 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(45, 90, 138, 0.3);
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ========================================
   基础重置
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    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: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header.light {
    color: var(--white);
}

.section-header.light .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-300);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--primary-50);
    color: var(--primary-500);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    letter-spacing: 0.05em;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.section-header.light h2 {
    color: var(--white);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.section-header.light p {
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    gap: var(--space-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-500) 0%, var(--accent-600) 100%);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(234, 88, 12, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(234, 88, 12, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(5, 10, 21, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

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

.logo-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.4));
    transition: filter var(--transition-base);
}

.logo:hover .logo-icon svg {
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.6));
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

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

.nav-links a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-400);
    transition: width var(--transition-base);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ========================================
   首页横幅 - 科技感增强版
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #050a15 0%, #0a1628 40%, #0d1f3c 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

/* 赛博网格 */
.cyber-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(500px) rotateX(60deg);
    transform-origin: center top;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { background-position: 0 0; }
    100% { background-position: 0 50px; }
}

/* 扫描线效果 */
.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 212, 255, 0.1) 20%,
        rgba(0, 212, 255, 0.8) 50%,
        rgba(0, 212, 255, 0.1) 80%,
        transparent 100%);
    animation: scanMove 4s ease-in-out infinite;
    opacity: 0.6;
}

@keyframes scanMove {
    0%, 100% { top: 0; opacity: 0; }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { top: 100%; opacity: 0; }
}

/* 粒子效果容器 */
.particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

/* 电路线条 */
.circuit-lines {
    position: absolute;
    inset: 0;
    opacity: 0.15;
    pointer-events: none;
}

.circuit-lines svg {
    width: 100%;
    height: 100%;
}

.circuit-path {
    fill: none;
    stroke: #00d4ff;
    stroke-width: 1;
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: circuitDraw 8s ease-in-out infinite;
}

.circuit-path:nth-child(2) { animation-delay: 1s; }
.circuit-path:nth-child(3) { animation-delay: 2s; }
.circuit-path:nth-child(4) { animation-delay: 3s; }

@keyframes circuitDraw {
    0%, 100% { stroke-dashoffset: 1000; }
    50% { stroke-dashoffset: 0; }
}

.circuit-node {
    fill: #00d4ff;
    animation: nodePulse 2s ease-in-out infinite;
}

.circuit-node:nth-child(6) { animation-delay: 0.2s; }
.circuit-node:nth-child(7) { animation-delay: 0.4s; }
.circuit-node:nth-child(8) { animation-delay: 0.6s; }
.circuit-node:nth-child(9) { animation-delay: 0.8s; }

@keyframes nodePulse {
    0%, 100% { opacity: 0.3; r: 4; }
    50% { opacity: 1; r: 6; }
}

/* 六边形图案 */
.hex-pattern {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%2300d4ff' fill-opacity='0.02'%3E%3Cpath d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

/* 渐变光球 - 增强版 */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.4) 0%, transparent 70%);
    top: -250px;
    right: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.3) 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

/* 科技角标 */
.tech-corner {
    position: absolute;
    width: 80px;
    height: 80px;
    pointer-events: none;
    z-index: 2;
}

.tech-corner::before,
.tech-corner::after {
    content: '';
    position: absolute;
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-tl {
    top: 20px;
    left: 20px;
}

.tech-corner-tl::before {
    top: 0;
    left: 0;
    width: 40px;
    height: 2px;
}

.tech-corner-tl::after {
    top: 0;
    left: 0;
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-tr {
    top: 20px;
    right: 20px;
}

.tech-corner-tr::before {
    top: 0;
    right: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(270deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-tr::after {
    top: 0;
    right: 0;
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-bl {
    bottom: 20px;
    left: 20px;
}

.tech-corner-bl::before {
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
}

.tech-corner-bl::after {
    bottom: 0;
    left: 0;
    width: 2px;
    height: 40px;
    background: linear-gradient(0deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-br {
    bottom: 20px;
    right: 20px;
}

.tech-corner-br::before {
    bottom: 0;
    right: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(270deg, rgba(0, 212, 255, 0.5), transparent);
}

.tech-corner-br::after {
    bottom: 0;
    right: 0;
    width: 2px;
    height: 40px;
    background: linear-gradient(0deg, rgba(0, 212, 255, 0.5), transparent);
}

/* Hero 内容区 */
.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-4xl) var(--space-lg);
    max-width: 900px;
}

/* Badge 徽章 - 科技感增强 */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    color: #00d4ff;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-xl);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease forwards, badgeGlow 3s ease-in-out infinite;
    animation-delay: 0.2s, 0s;
    opacity: 0;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #00d4ff;
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.7); }
    50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

@keyframes badgeGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.1); }
    50% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.2); }
}

/* 标题样式 */
.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
}

.hero-line {
    display: block;
    color: var(--white);
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    text-shadow: 0 0 40px rgba(255, 255, 255, 0.1);
}

.hero-line:first-child {
    animation-delay: 0.4s;
}

.hero-line.highlight {
    background: linear-gradient(135deg, #00d4ff 0%, #00ff88 50%, #00d4ff 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease forwards, gradientShift 5s ease infinite;
    animation-delay: 0.6s, 0s;
    filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.hero-desc {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.8s;
    opacity: 0;
}

/* 数据统计展示 */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.9s;
    opacity: 0;
}

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

.stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: #00d4ff;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.stat-label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

/* 按钮样式 - 科技感增强 */
.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 1s;
    opacity: 0;
}

.hero-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.hero-actions .btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.hero-actions .btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #050a15;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border: none;
    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, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
    border: 1px solid rgba(0, 212, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.5);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

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

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(0, 212, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    animation: fadeIn 1s ease forwards;
    animation-delay: 1.5s;
    opacity: 0;
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: #00d4ff;
    border-radius: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ========================================
   服务项目
   ======================================== */
.services {
    padding: var(--space-4xl) 0;
    background: var(--gray-50);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg, #0d1f3c 0%, transparent 100%);
    pointer-events: none;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.service-card.featured {
    background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
    color: var(--white);
}

.service-card.featured::before {
    background: linear-gradient(90deg, var(--accent-400), var(--accent-600));
    transform: scaleX(1);
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-300);
}

.service-card.featured h3 {
    color: var(--white);
}

.service-card.featured p {
    color: rgba(255, 255, 255, 0.7);
}

.service-card.featured .service-features li {
    color: rgba(255, 255, 255, 0.8);
}

.service-card.featured .service-features li::before {
    background: var(--accent-400);
}

.card-badge {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    padding: var(--space-xs) var(--space-md);
    background: var(--accent-500);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    letter-spacing: 0.05em;
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    color: var(--primary-500);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.service-icon svg {
    width: 32px;
    height: 32px;
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.service-card > p {
    color: var(--gray-600);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.service-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary-400);
    border-radius: 50%;
    flex-shrink: 0;
}

/* ========================================
   产品中心
   ======================================== */
.products {
    padding: var(--space-4xl) 0;
    background: var(--white);
}

.product-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
}

.tab-btn {
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--gray-100);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
}

.tab-btn:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.tab-btn.active {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
    box-shadow: 0 4px 12px rgba(45, 90, 138, 0.3);
}

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

.product-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition-base);
}

.product-card:hover {
    background: var(--white);
    border-color: var(--primary-200);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-card:hover::before {
    transform: scaleY(1);
}

.product-card.hidden {
    display: none;
}

.product-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    color: var(--primary-500);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.product-card:hover .product-icon {
    background: var(--primary-500);
    color: var(--white);
    border-color: var(--primary-500);
}

.product-icon svg {
    width: 24px;
    height: 24px;
}

.product-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.product-category {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-info h4 {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
}

.product-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ========================================
   我们的优势
   ======================================== */
.advantages {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
    position: relative;
    overflow: hidden;
}

.advantages::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(249, 115, 22, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(45, 90, 138, 0.2) 0%, transparent 50%);
}

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

.advantage-item {
    text-align: center;
    padding: var(--space-xl);
}

.advantage-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-400);
    line-height: 1;
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.advantage-item h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--space-sm);
}

.advantage-item p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* ========================================
   关于我们
   ======================================== */
.about {
    padding: var(--space-4xl) 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-text .section-tag {
    margin-bottom: var(--space-md);
}

.about-text h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-lg);
}

.about-intro {
    font-size: 1.0625rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
}

.detail-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    min-width: 80px;
}

.detail-value {
    font-weight: 500;
    color: var(--gray-800);
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-card {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
    border-radius: var(--radius-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.visual-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(249, 115, 22, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(45, 90, 138, 0.3) 0%, transparent 50%);
}

.visual-icon {
    position: relative;
    z-index: 1;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    color: var(--accent-300);
}

.visual-icon svg {
    width: 50px;
    height: 50px;
}

.visual-text {
    position: relative;
    z-index: 1;
    text-align: center;
}

.visual-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-xs);
}

.visual-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--white);
}

/* ========================================
   联系方式
   ======================================== */
.contact {
    padding: var(--space-4xl) 0;
    background: var(--gray-50);
}

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

.contact-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
    color: var(--white);
    border-radius: var(--radius-lg);
    margin: 0 auto var(--space-lg);
}

.contact-icon svg {
    width: 28px;
    height: 28px;
}

.contact-card h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

.contact-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

.contact-card a {
    color: var(--primary-500);
    font-weight: 500;
}

.contact-card a:hover {
    color: var(--accent-500);
}

.contact-note {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--gray-400);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: linear-gradient(180deg, #0a1628 0%, #050a15 100%);
    color: var(--white);
    padding: var(--space-3xl) 0 0;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
}

.footer-col h5 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--white);
}

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

.footer-col li,
.footer-col a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: #00d4ff;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom .icp a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom .icp a:hover {
    color: #00d4ff;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about-visual {
        order: -1;
    }
    
    .visual-card {
        max-width: 300px;
        aspect-ratio: auto;
        padding: var(--space-2xl);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-900);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-stats {
        gap: var(--space-md);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .stat-divider {
        height: 30px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .tech-corner {
        display: none;
    }
    
    .product-tabs {
        gap: var(--space-xs);
    }
    
    .tab-btn {
        padding: var(--space-xs) var(--space-md);
        font-size: 0.8125rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-content {
        padding: var(--space-3xl) var(--space-md);
    }
    
    .service-card {
        padding: var(--space-lg);
    }
    
    .contact-card {
        padding: var(--space-lg);
    }
}