/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
}

.surge-icon {
    margin-right: 10px;
    display: flex;
    align-items: center;
}

.surge-icon img {
    transition: transform 0.3s ease;
}

.surge-icon:hover img {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.8;
}


.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn i {
    margin-right: 8px;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

/* 设备模拟器 */
.device-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.macbook {
    width: 400px;
    height: 250px;
    background: #1a1a1a;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
}

.macbook::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
}

.screen {
    width: 100%;
    height: 100%;
    background: #f8fafc;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.surge-interface {
    padding: 15px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.interface-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e2e8f0;
}

.traffic-stats {
    display: flex;
    gap: 15px;
}

.stat {
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
}

.request-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.request-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    background: white;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    font-size: 11px;
}

.method {
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 10px;
}

.method.get {
    background: #dcfce7;
    color: #166534;
}

.method.post {
    background: #dbeafe;
    color: #1e40af;
}

.url {
    flex: 1;
    color: #374151;
    font-family: 'Monaco', 'Menlo', monospace;
}

.status {
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 10px;
}

.status.success {
    background: #dcfce7;
    color: #166534;
}

/* 章节标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #1e293b;
}

.section-header p {
    font-size: 1.2rem;
    color: #64748b;
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #f1f5f9;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.7;
}

/* 下载页面 */
.download {
    padding: 100px 0;
    background: #f8fafc;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.download-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.platform-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.platform-icon:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.surge-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 9px;
    padding: 6px;
}

.surge-logo img {
    transition: transform 0.3s ease;
}

.platform-icon:hover .surge-logo img {
    transform: scale(1.1);
}

.download-card h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.download-card p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.6;
}

.download-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    padding: 15px;
    background: #f8fafc;
    border-radius: 8px;
}

.version, .size {
    font-size: 14px;
    color: #64748b;
    font-weight: 500;
}

.download-notes {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.download-notes h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.download-notes ul {
    list-style: none;
    padding: 0;
}

.download-notes li {
    padding: 8px 0;
    color: #64748b;
    position: relative;
    padding-left: 20px;
}

.download-notes li::before {
    content: '•';
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 更新日志 */
.updates {
    padding: 100px 0;
    background: white;
}

.updates-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.update-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    padding: 30px;
    background: #f8fafc;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.update-item:hover {
    background: #f1f5f9;
    transform: translateX(5px);
}

.update-date {
    min-width: 120px;
    text-align: center;
}

.date {
    display: block;
    font-size: 14px;
    color: #64748b;
    margin-bottom: 5px;
}

.version {
    display: block;
    font-size: 12px;
    background: #2563eb;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.update-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.update-content ul {
    list-style: none;
    padding: 0;
}

.update-content li {
    padding: 5px 0;
    color: #64748b;
    position: relative;
    padding-left: 20px;
}

.update-content li::before {
    content: '✓';
    color: #10b981;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.updates-footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
}

.updates-footer a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
}

.updates-footer a:hover {
    text-decoration: underline;
}

/* 订阅模式说明 */
.subscription-info {
    margin-top: 60px;
}

.subscription-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.subscription-card h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-align: center;
}

.subscription-card > p {
    text-align: center;
    margin-bottom: 30px;
    opacity: 0.9;
    font-size: 1.1rem;
}

.subscription-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.feature-item i {
    color: #10b981;
    font-size: 18px;
}

.feature-item span {
    font-weight: 500;
}

.subscription-pricing h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.pricing-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.pricing-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.pricing-item .devices {
    display: block;
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 8px;
}

.pricing-item .price {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
}

/* 技术支持 */
.support {
    padding: 100px 0;
    background: #f8fafc;
}

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

.support-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.support-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.support-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.support-icon i {
    font-size: 24px;
    color: white;
}

.support-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.support-card p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo .surge-icon {
    margin-right: 0;
}

.footer-logo h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    margin: 0;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-section p {
    color: #94a3b8;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

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

.footer-section a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #334155;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #334155;
    color: #94a3b8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .macbook {
        width: 300px;
        height: 200px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .update-item {
        flex-direction: column;
        text-align: center;
    }

    .update-date {
        min-width: auto;
    }

    .support-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .macbook {
        width: 250px;
        height: 160px;
    }
}

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

.feature-card,
.download-card,
.support-card {
    animation: fadeInUp 0.6s ease-out;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #2563eb;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}