/* 高端企业官网样式 */

/* 基础重置和配色 */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-accent: #f1f5f9;
    --border: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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 25px 50px -12px rgba(0, 0, 0, 0.25);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    font-size: 16px;
}

/* 高端导航栏 */
.premium-navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.premium-navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

.premium-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.premium-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.premium-nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.premium-nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.premium-nav-menu a:hover,
.premium-nav-menu a.active {
    color: var(--primary);
}

.premium-nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

/* 移动端菜单 */
.premium-mobile-menu {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
}

/* 英雄区域 */
.premium-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-accent) 100%);
    position: relative;
    overflow: hidden;
}

.premium-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.premium-hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.premium-hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.premium-hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 高端按钮 */
.premium-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.premium-btn:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* 卡片组件 */
.premium-card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

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

.premium-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
}

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

/* 网格布局 */
.premium-grid {
    display: grid;
    gap: 2rem;
}

.premium-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.premium-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.premium-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* 容器 */
.premium-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.premium-section {
    padding: 6rem 0;
}

.premium-section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.premium-section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

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

/* 统计数据 */
.premium-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.premium-stat {
    padding: 2rem;
}

.premium-stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
}

.premium-stat-label {
    color: var(--text-secondary);
    font-weight: 600;
}

/* 表单样式 */
.premium-form {
    max-width: 600px;
    margin: 0 auto;
}

.premium-form-group {
    margin-bottom: 1.5rem;
}

.premium-form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary);
}

.premium-form-input,
.premium-form-textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--bg-primary);
}

.premium-form-input:focus,
.premium-form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* 页脚 */
.premium-footer {
    background: var(--primary);
    color: white;
    padding: 3rem 0 2rem;
    text-align: center;
}

.premium-footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.premium-footer h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.premium-footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.premium-footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.premium-footer a:hover {
    color: white;
}

.premium-footer-divider {
    border: none;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
    margin: 2rem 0 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .premium-nav-menu {
        display: none;
    }
    
    .premium-mobile-menu {
        display: block;
    }
    
    .premium-hero h1 {
        font-size: 2.5rem;
    }
    
    .premium-hero p {
        font-size: 1.125rem;
    }
    
    .premium-section-header h2 {
        font-size: 2rem;
    }
    
    .premium-container {
        padding: 0 1rem;
    }
    
    .premium-section {
        padding: 4rem 0;
    }
}

@media (max-width: 480px) {
    .premium-hero h1 {
        font-size: 2rem;
    }
    
    .premium-nav-content {
        padding: 0 1rem;
    }
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}