/* ========================================
   亿创权益企业官网 - 主样式表
   纯静态网站，无需PHP/MySQL
   SEO优化，响应式设计
   ======================================== */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #f59e0b;
    
    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    --border-color: #e5e7eb;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
    --gradient-dark: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* 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 -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 间距 */
    --section-padding: 100px;
    --container-max-width: 1280px;
    
    /* 字体 */
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* 页面加载动画 */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 3px solid var(--bg-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 2px;
}

/* 容器 */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* 通用按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

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

.btn-outline:hover {
    background: var(--bg-white);
    color: var(--primary-color);
}

.btn-full {
    width: 100%;
}

/* 区块通用样式 */
.section {
    padding: var(--section-padding) 0;
}

.section-sm {
    padding: 60px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-light);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

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

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-base);
    padding: 20px 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
    transition: var(--transition-base);
}

.header.scrolled .logo {
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 8px 0;
    transition: var(--transition-base);
}

.header.scrolled .nav-link {
    color: var(--text-primary);
}

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

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

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

.admin-link {
    font-size: 1.2rem;
    opacity: 0.6;
    transition: var(--transition-base);
    color: var(--bg-white);
}

.header.scrolled .admin-link {
    color: var(--text-primary);
}

.admin-link:hover {
    opacity: 1;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--bg-white);
    transition: var(--transition-base);
}

.header.scrolled .mobile-menu-btn span {
    background: var(--text-primary);
}

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

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero 主视觉区
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-dark);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(14, 165, 233, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--bg-white);
    padding: 120px 20px 60px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

/* Hero 统计数据 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-number,
.stat-suffix {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
    margin: 10px auto 0;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   关于我们
   ======================================== */
.about {
    background: var(--bg-light);
}

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

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
}

.about-img-placeholder {
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 5rem;
    box-shadow: var(--shadow-xl);
}

.about-img-placeholder p {
    font-size: 1rem;
    margin-top: 10px;
    opacity: 0.8;
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--bg-white);
    padding: 24px 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.exp-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.exp-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-card {
    background: var(--bg-white);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.value-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.value-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.value-list .icon {
    color: var(--primary-color);
    font-weight: 700;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-item {
    text-align: center;
    padding: 24px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* ========================================
   服务内容
   ======================================== */
.services {
    background: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-light);
    padding: 40px 32px;
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 24px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.service-list {
    margin-bottom: 24px;
}

.service-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    padding-left: 16px;
}

.service-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.service-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.service-link:hover {
    gap: 8px;
}

/* 服务卡片彩色主题 */
.service-blue .service-icon {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.service-blue .service-link {
    color: #2563eb;
}

.service-blue::before {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.service-green .service-icon {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.service-green .service-link {
    color: #059669;
}

.service-green::before {
    background: linear-gradient(135deg, #10b981, #059669);
}

.service-purple .service-icon {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.service-purple .service-link {
    color: #7c3aed;
}

.service-purple::before {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.service-orange .service-icon {
    background: linear-gradient(135deg, #f97316, #ea580c);
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
}

.service-orange .service-link {
    color: #ea580c;
}

.service-orange::before {
    background: linear-gradient(135deg, #f97316, #ea580c);
}

.service-pink .service-icon {
    background: linear-gradient(135deg, #ec4899, #db2777);
    box-shadow: 0 8px 20px rgba(236, 72, 153, 0.3);
}

.service-pink .service-link {
    color: #db2777;
}

.service-pink::before {
    background: linear-gradient(135deg, #ec4899, #db2777);
}

.service-cyan .service-icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
}

.service-cyan .service-link {
    color: #0891b2;
}

.service-cyan::before {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

/* ========================================
   成功案例
   ======================================== */
.cases {
    background: var(--bg-light);
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: var(--bg-white);
    border-color: var(--primary-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.case-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.case-img-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-view {
    color: var(--bg-white);
    border: 2px solid var(--bg-white);
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 500;
}

.case-view:hover {
    background: var(--bg-white);
    color: var(--primary-color);
}

.case-info {
    padding: 24px;
}

.case-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.case-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.case-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   团队介绍
   ======================================== */
.team {
    background: var(--bg-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
}

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

.team-avatar {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 20px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.team-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.team-role {
    display: block;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.team-card > p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.team-social {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.team-social a {
    width: 36px;
    height: 36px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    transition: var(--transition-base);
}

.team-social a:hover {
    background: var(--primary-color);
    color: var(--bg-white);
}

/* ========================================
   合作伙伴
   ======================================== */
.partners {
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.partners-title {
    text-align: center;
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-weight: 400;
}

.partners-marquee {
    position: relative;
    overflow: hidden;
}

.partners-marquee::before,
.partners-marquee::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.partners-marquee::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-white), transparent);
}

.partners-marquee::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-white), transparent);
}

.partners-track {
    display: flex;
    gap: 80px;
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.partner-logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-light);
    white-space: nowrap;
    transition: var(--transition-base);
}

.partner-logo:hover {
    color: var(--primary-color);
}

/* ========================================
   联系我们
   ======================================== */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.contact-card {
    background: var(--bg-white);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

/* 联系表单 */
.contact-form-wrapper {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 28px;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition-base);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-loading {
    display: none;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loading {
    display: inline;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--gradient-dark);
    color: var(--bg-white);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-brand > p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary-color);
    color: var(--bg-white);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: var(--transition-base);
}

.footer-column ul li a:hover {
    color: var(--bg-white);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer-bottom p:first-child {
    margin-bottom: 8px;
}

/* ========================================
   回到顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ========================================
   悬浮侧边按钮
   ======================================== */
.floating-widget {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 998;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.floating-btn {
    width: 60px;
    height: 100px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 30px 0 0 30px;
    color: var(--bg-white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
    box-shadow: -4px 4px 20px rgba(37, 99, 235, 0.3);
    transition: var(--transition-base);
    position: relative;
    z-index: 2;
}

.floating-btn:hover {
    width: 70px;
    background: var(--primary-dark);
}

.floating-btn.active {
    background: var(--primary-dark);
}

.floating-icon {
    font-size: 1.5rem;
}

.floating-text {
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.3;
    text-align: center;
}

/* 悬浮菜单 */
.floating-menu {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%) scale(0);
    transform-origin: right center;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 12px;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.floating-widget.active .floating-menu {
    transform: translateY(-50%) scale(1);
    opacity: 1;
    visibility: visible;
}

.floating-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--text-primary);
}

.floating-menu-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.floating-menu-item .menu-icon {
    font-size: 1.25rem;
}

.floating-menu-item .menu-text {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ========================================
   二维码弹窗
   ======================================== */
.qrcode-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    backdrop-filter: blur(4px);
}

.qrcode-modal.active {
    opacity: 1;
    visibility: visible;
}

.qrcode-content {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 380px;
    padding: 32px;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition-base);
    box-shadow: var(--shadow-xl);
}

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

.qrcode-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-light);
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.qrcode-close:hover {
    background: var(--danger-color);
    color: var(--bg-white);
}

.qrcode-header {
    text-align: center;
    margin-bottom: 24px;
}

.qrcode-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 12px;
}

.qrcode-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.qrcode-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.qrcode-body {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qrcode-placeholder {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.qrcode-box {
    width: 200px;
    height: 200px;
    background: var(--bg-white);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.qrcode-box span {
    font-size: 3rem;
}

.qrcode-box p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.qrcode-box small {
    font-size: 0.75rem;
    color: var(--text-light);
}

.qrcode-tips {
    text-align: center;
}

.qrcode-tips p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

/* 响应式 - 移动端悬浮按钮调整 */
@media (max-width: 768px) {
    .floating-widget {
        top: auto;
        bottom: 100px;
        right: 0;
        transform: none;
    }
    
    .floating-btn {
        width: 50px;
        height: 80px;
        border-radius: 25px 0 0 25px;
    }
    
    .floating-btn:hover {
        width: 55px;
    }
    
    .floating-icon {
        font-size: 1.25rem;
    }
    
    .floating-text {
        font-size: 0.65rem;
    }
    
    .floating-menu {
        right: 55px;
        min-width: 140px;
    }
    
    .floating-menu-item {
        padding: 12px 14px;
    }
    
    .floating-menu-item .menu-text {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .qrcode-content {
        padding: 24px;
    }
    
    .qrcode-box {
        width: 160px;
        height: 160px;
    }
}

/* ========================================
   弹窗
   ======================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-white);
    padding: 48px;
    border-radius: var(--radius-xl);
    text-align: center;
    max-width: 400px;
    transform: scale(0.9);
    transition: var(--transition-base);
}

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

.modal-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--bg-white);
    margin: 0 auto 24px;
}

.modal-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.modal-close {
    min-width: 120px;
}

/* ========================================
   动画效果
   ======================================== */
[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);
}

/* 淡入动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .services-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    :root {
        --section-padding: 80px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-links {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 20px;
        transition: var(--transition-base);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        color: var(--text-primary) !important;
        font-size: 1.1rem;
    }
    
    .services-grid,
    .cases-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number,
    .stat-suffix {
        font-size: 2rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .value-list {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --section-padding: 60px;
    }
    
    .hero-content {
        padding: 100px 16px 40px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .contact-form-wrapper {
        padding: 24px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   打印样式
   ======================================== */
@media print {
    .header,
    .back-to-top,
    .scroll-indicator,
    .mobile-menu-btn {
        display: none !important;
    }
    
    .section {
        padding: 40px 0;
        page-break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        color: #000;
    }
    
    a {
        text-decoration: underline;
    }
}

/* ========================================
   无障碍支持
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .partners-track {
        animation: none;
    }
}

/* 焦点样式 */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
}