/* 玻璃液态风格CSS */
:root {
    --primary: #6a11cb;
    --secondary: #2575fc;
    --accent: #ff6b6b;
    --dark: #1a1a2e;
    --light: #f8f9fa;
    --glass: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
}

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

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #fff;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    z-index: -2;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 16px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(255, 255, 255, 0.2);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--glass);
    border-color: white;
    transform: translateY(-2px);
}

/* 导航栏 */
.navbar {
    background: var(--glass);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, white, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar nav ul {
    display: flex;
    list-style: none;
    flex-wrap: wrap;
}

.navbar nav ul li {
    margin: 0 15px;
}

.navbar nav ul li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.navbar nav ul li a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.navbar nav ul li a:hover:after {
    width: 100%;
}

.navbar nav ul li a:hover {
    color: white;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.auth-buttons .btn {
    margin-left: 10px;
}

/* 主视觉区域 */
.hero {
    padding: 120px 0 80px;
    position: relative;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, white, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 20px rgba(0,0,0,0.1);
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    margin: 60px 0;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    margin: 0 30px;
    padding: 25px;
    background: var(--glass);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    min-width: 180px;
}

.stat-item .number {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.stat-item .label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
}

.hero-buttons .btn {
    margin: 0 15px;
}

/* 产品中心 */
.product-center {
    padding: 80px 0;
}

.product-center h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.product-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.product-intro p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    font-size: 18px;
}

.product-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab {
    padding: 15px 30px;
    background: var(--glass);
    border: none;
    border-radius: 50px;
    margin: 5px 10px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.tab.active, .tab:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 10px 30px rgba(31, 38, 135, 0.5);
    transform: translateY(-3px);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.product-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.liquid-badge {
    display: inline-block;
    padding: 5px 15px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: white;
}

.product-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.6;
}

.product-card ul {
    margin: 15px 0;
    padding-left: 20px;
}

.product-card ul li {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

.price {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin: 20px 0;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.price span {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

/* 核心功能 */
.core-features {
    padding: 80px 0;
}

.core-features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.feature-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.feature-intro p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.feature-intro ul {
    text-align: left;
    max-width: 600px;
    margin: 20px auto;
    padding-left: 20px;
}

.feature-intro ul li {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.liquid-icon {
    font-size: 48px;
    margin-bottom: 20px;
    text-align: center;
    color: white;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: white;
    text-align: center;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.6;
    text-align: center;
}

.feature-card ul {
    margin: 15px 0;
    padding-left: 20px;
}

.feature-card ul li {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

/* 价格体系 */
.pricing-system {
    padding: 80px 0;
}

.pricing-system h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.pricing-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.pricing-intro p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.pricing-intro ul {
    text-align: left;
    max-width: 600px;
    margin: 20px auto;
    padding-left: 20px;
}

.pricing-intro ul li {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.pricing-card:hover {
    transform: scale(1.03);
    box-shadow: 0 20px 40px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.pricing-card.popular {
    border: 2px solid white;
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(31, 38, 135, 0.6);
}

.pricing-card.popular:hover {
    transform: scale(1.08);
}

.popular-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: linear-gradient(135deg, var(--accent), #ff8e53);
    color: white;
    padding: 5px 30px;
    transform: rotate(45deg);
    font-size: 14px;
    font-weight: 500;
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: white;
}

.price {
    font-size: 48px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.price span {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

.pricing-card ul {
    list-style: none;
    margin: 20px 0;
    text-align: left;
}

.pricing-card ul li {
    padding: 10px 0;
    border-bottom: 1px solid var(--glass-border);
    color: rgba(255, 255, 255, 0.9);
}

.pricing-card ul li:before {
    content: "✓";
    color: #4caf50;
    margin-right: 10px;
    font-weight: bold;
}

.pricing-card p {
    color: rgba(255, 255, 255, 0.9);
    margin: 20px 0;
    line-height: 1.6;
}

/* 客户案例 */
.customer-cases {
    padding: 80px 0;
}

.customer-cases h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.case-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.case-intro p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    font-size: 18px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.case-logo {
    font-size: 24px;
    font-weight: 700;
    color: white;
}

.case-rating {
    color: #ffc107;
    font-size: 20px;
}

.case-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: white;
}

.case-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-style: italic;
}

.case-details p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin: 5px 0;
    font-style: normal;
}

.case-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.stat {
    text-align: center;
}

.stat .number {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 5px;
}

.stat .label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* 技术优势 */
.tech-advantages {
    padding: 80px 0;
}

.tech-advantages h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.tech-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.tech-intro p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.tech-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.tech-card .liquid-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: white;
}

.tech-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: white;
    text-align: center;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.6;
    text-align: center;
}

.tech-card ul {
    margin: 15px 0;
    padding-left: 20px;
}

.tech-card ul li {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

/* 安全保障 */
.security-system {
    padding: 80px 0;
}

.security-system h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.security-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.security-intro p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.security-card {
    background: var(--glass);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.security-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.security-card .liquid-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: white;
    text-align: center;
}

.security-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: white;
    text-align: center;
}

.security-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    line-height: 1.6;
    text-align: center;
}

.security-card ul {
    margin: 15px 0;
    padding-left: 20px;
}

.security-card ul li {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

/* 图片展示区块 */
.image-gallery {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.05);
}

.image-gallery h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.gallery-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.gallery-intro p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.gallery-item {
    background: var(--glass);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
}

.image-placeholder {
    height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.image-placeholder p {
    color: white;
    background: rgba(0, 0, 0, 0.5);
    padding: 5px 10px;
    border-radius: 10px;
    margin-bottom: 10px;
    z-index: 2;
    text-align: center;
}

.image-caption {
    padding: 20px;
    text-align: center;
}

.image-caption h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: white;
}

.image-caption p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    line-height: 1.5;
}

/* 底部 */
footer {
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(20px);
    padding: 60px 0 30px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3, .footer-col h4 {
    margin-bottom: 20px;
    color: white;
}

.footer-col p, .footer-col li {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

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

.footer-col ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    margin-top: 20px;
}

.social-links a {
    display: inline-block;
    font-size: 24px;
    margin-right: 15px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: white;
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-content p {
        font-size: 18px;
    }
    
    .stat-item {
        margin: 15px;
        min-width: 140px;
    }
    
    .stat-item .number {
        font-size: 28px;
    }
    
    .navbar .container {
        flex-direction: column;
    }
    
    .navbar nav ul {
        margin: 20px 0;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .navbar nav ul li {
        margin: 5px 10px;
    }
    
    .auth-buttons {
        margin-top: 20px;
    }
    
    .product-grid, .feature-grid, .pricing-cards, .case-grid, .tech-grid, .security-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
    
    .pricing-card.popular:hover {
        transform: scale(1.03);
    }
}