:root {
    /* 主色调 - 蓝色主题（类似快连） */
    --primary-color: #007AFF;
    --primary-light: #4DA3FF;
    --primary-dark: #0056B3;
    --secondary-color: #34C759;
    --accent-color: #FF9500;
    
    /* 中性色 */
    --white: #ffffff;
    --gray-50: #F5F5F7;
    --gray-100: #E8E8ED;
    --gray-200: #D2D2D7;
    --gray-300: #AEAEB2;
    --gray-400: #8E8E93;
    --gray-500: #636366;
    --gray-600: #48484A;
    --gray-700: #3A3A3C;
    --gray-800: #1C1C1E;
    --gray-900: #000000;
    
    /* 功能色 */
    --success: #34C759;
    --warning: #FF9500;
    --error: #FF3B30;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.24);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-100);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    margin-right: 10px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--gray-50);
}

.cta-button {
    background: var(--primary-color) !important;
    color: var(--white) !important;
    padding: 10px 24px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 600;
}

.cta-button:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: var(--transition);
}

/* 首屏英雄区域 */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.3;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.8;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

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

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-500);
    font-weight: 500;
}

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

.btn {
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.hero-image {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    width: 100px;
    height: 100px;
    background: var(--white);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: var(--shadow-xl);
    animation: float 3s ease-in-out infinite;
    border: 1px solid var(--gray-100);
}

.card-1 {
    top: 15%;
    left: 15%;
    animation-delay: 0s;
}

.card-2 {
    top: 45%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 15%;
    left: 35%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-25px); }
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* 特性区域 */
.features {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    text-align: left;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 技术优势区域 */
.technology {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
}

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

.technology .section-title {
    color: var(--white);
}

.technology .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.tech-desc {
    font-size: 1.2rem;
    margin-bottom: 32px;
    opacity: 0.95;
    line-height: 1.8;
}

.tech-list {
    space-y: 24px;
}

.tech-item {
    margin-bottom: 24px;
}

.tech-item strong {
    display: block;
    font-size: 1.15rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.tech-item p {
    opacity: 0.9;
    line-height: 1.7;
    font-size: 0.95rem;
}

.tech-animation {
    position: relative;
    height: 350px;
}

.node {
    position: absolute;
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    backdrop-filter: blur(10px);
    animation: pulse 2s infinite;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.node-1 { top: 20%; left: 20%; animation-delay: 0s; }
.node-2 { top: 50%; right: 20%; animation-delay: 0.7s; }
.node-3 { bottom: 20%; left: 50%; animation-delay: 1.4s; }

.connection-line {
    position: absolute;
    background: rgba(255, 255, 255, 0.4);
    height: 3px;
    transform-origin: left center;
    border-radius: 2px;
}

.line-1 { 
    width: 150px; 
    top: 35%; 
    left: 35%; 
    transform: rotate(25deg);
    animation: flow 3s infinite;
}

.line-2 { 
    width: 130px; 
    top: 65%; 
    right: 35%; 
    transform: rotate(-30deg);
    animation: flow 3s infinite 1s;
}

.line-3 { 
    width: 110px; 
    top: 45%; 
    left: 55%; 
    transform: rotate(60deg);
    animation: flow 3s infinite 2s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

@keyframes flow {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

/* 服务器区域 */
.servers {
    background: var(--gray-50);
}

.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.server-region {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.server-region:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.region-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: left;
}

.server-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.server-city {
    padding: 12px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    text-align: left;
    transition: var(--transition);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 500;
}

.server-city:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateX(4px);
}

/* 价格区域 */
.pricing {
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: 8px 24px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.plan-price {
    margin-bottom: 8px;
}

.currency {
    font-size: 1.5rem;
    color: var(--gray-500);
    font-weight: 600;
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.period {
    font-size: 1rem;
    color: var(--gray-500);
    font-weight: 500;
}

.plan-discount {
    background: var(--secondary-color);
    color: var(--white);
    padding: 6px 16px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 24px;
}

.plan-features {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.plan-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    font-size: 0.95rem;
    font-weight: 500;
}

.plan-features li:last-child {
    border-bottom: none;
}

.btn-outline {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    width: 100%;
}

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

.pricing-card.featured .btn-primary {
    width: 100%;
}

/* 用户评价区域 */
.reviews {
    background: var(--gray-50);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.review-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}

.review-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    margin-right: 16px;
}

.review-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.review-location {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.review-rating {
    font-size: 1.2rem;
    color: var(--warning);
    margin-bottom: 12px;
}

.review-text {
    color: var(--gray-600);
    line-height: 1.7;
    font-style: italic;
}

/* FAQ区域 */
.faq {
    background: var(--white);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--gray-50);
    margin-bottom: 12px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--gray-100);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--gray-100);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
    font-weight: 400;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 600px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--gray-700);
    line-height: 1.8;
    font-size: 0.95rem;
}

.faq-answer p:not(:last-child) {
    margin-bottom: 12px;
}

/* 行动号召区域 */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    text-align: center;
    padding: 120px 0;
}

.cta-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--white);
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.download-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.4);
    color: var(--white);
    padding: 16px 28px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.download-btn:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 1.4rem;
}

.download-note {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--white);
    font-weight: 700;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.footer-desc {
    color: var(--gray-400);
    line-height: 1.6;
    margin-bottom: 8px;
}

.footer-contact {
    color: var(--primary-color);
    font-weight: 600;
}

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

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

.footer-section ul li a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
    display: inline-block;
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 24px;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* 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: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 24px 0;
        gap: 8px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .tech-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .tech-item {
        text-align: left;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .servers-grid,
    .pricing-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
}