:root {
    /* 主色调 - 简洁商务蓝 */
    --primary-color: #1a5490;
    --primary-hover: #144273;

    /* 中性色 */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f0f0f0;
    --gray-200: #e0e0e0;
    --gray-500: #757575;
    --gray-700: #424242;
    --gray-900: #212121;

    /* 简单阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);

    /* 简单圆角 */
    --radius: 4px;

    /* 简单过渡 */
    --transition: all 0.15s ease;
}

* {
    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: var(--white);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--gray-900);
}

.logo-icon {
    margin-right: 8px;
    font-size: 1.3rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 400;
    font-size: 0.9rem;
    transition: var(--transition);
    padding: 8px 12px;
}

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

.cta-button {
    background: var(--primary-color) !important;
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: var(--radius);
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
}

.cta-button:hover {
    background: var(--primary-hover) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--gray-700);
}

/* 首屏英雄区域 */
.hero {
    padding: 100px 0 60px;
    background: var(--white);
}

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

.hero-title {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 20px;
    color: var(--gray-900);
}

.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--gray-500);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 30px;
}

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

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

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

.hero-buttons {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--gray-50);
}

.hero-image {
    position: relative;
    height: 350px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    display: none;
}

/* 通用区块样式 */
section {
    padding: 70px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--gray-500);
    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(280px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    text-align: left;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.feature-card:hover {
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 1.8rem;
    margin-bottom: 14px;
}

.feature-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.feature-desc {
    color: var(--gray-500);
    line-height: 1.6;
    font-size: 0.9rem;
}

/* 技术优势区域 */
.technology {
    background: var(--gray-50);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.tech-desc {
    font-size: 1rem;
    margin-bottom: 24px;
    line-height: 1.6;
    color: var(--gray-700);
}

.tech-list {
    space-y: 20px;
}

.tech-item {
    margin-bottom: 18px;
}

.tech-item strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--gray-900);
}

.tech-item p {
    color: var(--gray-500);
    line-height: 1.6;
    font-size: 0.9rem;
}

.tech-animation {
    position: relative;
    height: 280px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.node,
.connection-line {
    display: none;
}

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

.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.server-region {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.server-region:hover {
    border-color: var(--primary-color);
}

.region-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    text-align: left;
}

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

.server-city {
    padding: 10px 14px;
    background: var(--gray-50);
    border-radius: var(--radius);
    text-align: left;
    transition: var(--transition);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 400;
}

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

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

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: var(--primary-color);
}

.pricing-card.featured {
    border-color: var(--primary-color);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    padding: 6px 18px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 14px;
}

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

.currency {
    font-size: 1.2rem;
    color: var(--gray-500);
    font-weight: 500;
}

.amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.period {
    font-size: 0.95rem;
    color: var(--gray-500);
}

.plan-discount {
    background: var(--primary-color);
    color: var(--white);
    padding: 4px 12px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 20px;
}

.plan-features {
    list-style: none;
    margin-bottom: 24px;
    text-align: left;
}

.plan-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 400;
}

.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);
}

.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(300px, 1fr));
    gap: 20px;
}

.review-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.review-card:hover {
    border-color: var(--primary-color);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 14px;
}

.review-avatar {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 600;
    margin-right: 14px;
}

.review-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 2px;
}

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

.review-rating {
    font-size: 1.1rem;
    color: #FFA500;
    margin-bottom: 12px;
}

.review-text {
    color: var(--gray-500);
    line-height: 1.6;
    font-size: 0.95rem;
}

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

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--gray-50);
    margin-bottom: 10px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    padding: 18px 20px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    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: 1.4rem;
    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 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 20px 18px;
    color: var(--gray-700);
    line-height: 1.6;
    font-size: 0.95rem;
}

.faq-answer p:not(:last-child) {
    margin-bottom: 10px;
}

/* 行动号召区域 */
.cta-section {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 80px 0;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--white);
}

.cta-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.download-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 14px 24px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 500;
}

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

.download-icon {
    font-size: 1.2rem;
}

.download-note {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 50px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--white);
    font-weight: 600;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 14px;
}

.footer-desc {
    color: var(--gray-500);
    line-height: 1.6;
    margin-bottom: 8px;
}

.footer-contact {
    color: var(--primary-color);
    font-weight: 500;
}

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

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

.footer-section ul li a {
    color: var(--gray-500);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 20px;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* 下载页面样式 */
.download-hero {
    background: var(--gray-50);
    padding: 100px 0 60px;
    text-align: center;
}

.download-hero .section-title {
    margin-bottom: 12px;
}

.download-hero .section-subtitle {
    margin-bottom: 24px;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.platform-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.platform-card:hover {
    border-color: var(--primary-color);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.platform-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.platform-version {
    color: var(--gray-500);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.platform-features {
    list-style: none;
    margin-bottom: 24px;
    text-align: left;
}

.platform-features li {
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    font-size: 0.9rem;
}

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

.platform-features li:before {
    content: "✓";
    color: var(--primary-color);
    margin-right: 8px;
    font-weight: bold;
}

/* 404页面样式 */
.error-page {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
}

.error-content {
    max-width: 500px;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    line-height: 1;
}

.error-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.error-message {
    color: var(--gray-500);
    margin-bottom: 32px;
    line-height: 1.6;
}

.error-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.countdown {
    margin-top: 24px;
    color: var(--gray-500);
    font-size: 0.95rem;
}

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
        padding: 20px 0;
        gap: 6px;
    }

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

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .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: 260px;
        justify-content: center;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .features-grid,
    .servers-grid,
    .pricing-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.6rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 260px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .error-actions {
        flex-direction: column;
        align-items: center;
    }
}