/* 烟台卓远信息技术有限公司 - 企业官网样式 */

:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --secondary-color: #34a853;
    --accent-color: #fbbc04;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-light: #80868b;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e8eaed;
    --shadow-sm: 0 1px 2px 0 rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
    --shadow-md: 0 1px 3px 0 rgba(60,64,67,.3), 0 4px 8px 3px rgba(60,64,67,.15);
    --shadow-lg: 0 4px 6px 0 rgba(60,64,67,.3), 0 12px 24px 4px rgba(60,64,67,.15);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-blue: linear-gradient(135deg, #1a73e8 0%, #4285f4 100%);
    --gradient-green: linear-gradient(135deg, #34a853 0%, #46b450 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-blue);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 5px 0;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
    padding-top: 70px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.08) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-content h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 35px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(26, 115, 232, 0.45);
}

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

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

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 45px;
    padding-top: 35px;
    border-top: 1px solid var(--border-color);
}

.stat-item h3 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-item p {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 5px;
}

/* Section 通用样式 */
.section {
    padding: 90px 0;
}

.section-header {
    text-align: center;
    max-width: 650px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 产品展示 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

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

.product-image {
    height: 220px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image .icon {
    font-size: 80px;
    opacity: 0.9;
}

.product-info {
    padding: 28px;
}

.product-info h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.product-info p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 18px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--bg-light);
    color: var(--text-secondary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 13px;
}

/* 特性区域 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 40px 25px;
    background: var(--bg-white);
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.feature-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-blue);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 22px;
    font-size: 32px;
}

.feature-item:nth-child(2) .feature-icon {
    background: var(--gradient-green);
}

.feature-item:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.feature-item:nth-child(4) .feature-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.feature-item h3 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

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

.about-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-list {
    list-style: none;
    margin-top: 25px;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
}

.about-list li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

/* 数据统计 */
.stats-section {
    background: var(--gradient-primary);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-box h3 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-box p {
    font-size: 16px;
    opacity: 0.9;
}

/* 联系信息 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.contact-card {
    background: var(--bg-white);
    padding: 35px 28px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.contact-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-blue);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.contact-card a:hover {
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background: #1a1a2e;
    color: white;
    padding: 70px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 18px;
}

.footer-brand .logo-icon {
    background: var(--gradient-blue);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-column h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 22px;
    color: white;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    line-height: 1.8;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

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

/* 用户协议 */
.agreement-container {
    max-width: 900px;
    margin: 100px auto;
    padding: 0 20px;
}

.agreement-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.agreement-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.agreement-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

.agreement-content {
    background: var(--bg-white);
    padding: 45px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.agreement-content h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 30px 0 15px;
    padding-left: 15px;
    border-left: 4px solid var(--primary-color);
}

.agreement-content h2:first-child {
    margin-top: 0;
}

.agreement-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 15px;
    text-indent: 2em;
}

.agreement-content ul {
    padding-left: 25px;
    margin-bottom: 15px;
}

.agreement-content li {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 8px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 25px;
    }
    
    .stat-box h3 {
        font-size: 36px;
    }
    
    .agreement-content {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 60px 0;
    }
}