:root {
    --bg-color: #0f172a; /* 深邃夜空蓝 */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #e2e8f0; /* 白月光银白 */
    --accent-color: #38bdf8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --hover-bg: rgba(51, 65, 85, 0.8);
    --success-color: #10b981;
    --border-radius: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 动态背景容器 */
.dynamic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(135deg, #020617 0%, #0f172a 100%);
}

.glow-1 {
    position: absolute;
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(226, 232, 240, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    animation: float 20s infinite alternate;
}

.glow-2 {
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    animation: float 25s infinite alternate-reverse;
}

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

canvas#starfield {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* 通用样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.bg-light {
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(10px);
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.highlight {
    color: var(--primary-color);
    text-shadow: 0 0 15px rgba(226, 232, 240, 0.5);
}

.grid {
    display: grid;
    gap: 30px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    gap: 8px;
}

.btn-primary {
    background: var(--primary-color);
    color: #0f172a;
    box-shadow: 0 4px 15px rgba(226, 232, 240, 0.2);
}

.btn-primary:hover {
    background: #ffffff;
    box-shadow: 0 6px 20px rgba(226, 232, 240, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.05);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

/* 玻璃态卡片 */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    padding: 15px 0;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo i {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(226, 232, 240, 0.5);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    gap: 15px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero区块 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    font-size: 0.85rem;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    border-top: 1px solid var(--glass-border);
    padding-top: 40px;
}

.stat-item h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 核心优势 */
.features-grid {
    grid-template-columns: repeat(3, 1fr);
}

.feature-card .icon-wrapper {
    width: 60px;
    height: 60px;
    background: rgba(226, 232, 240, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-card:hover .icon-wrapper {
    background: var(--primary-color);
    color: #0f172a;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 节点状态 */
.status-panel {
    padding: 0;
    overflow: hidden;
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
}

.status-ok {
    color: var(--success-color);
    font-weight: 500;
}

.status-update {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.node-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 30px;
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition);
}

.node-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.node-item:last-child {
    border-bottom: none;
}

.node-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.flag {
    font-size: 1.2rem;
}

.node-name {
    font-weight: 500;
}

.node-latency {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--success-color);
}

.ping-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* 套餐价格 */
.pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    position: relative;
}

.popular {
    border-color: rgba(226, 232, 240, 0.4);
    box-shadow: 0 0 30px rgba(226, 232, 240, 0.1);
    transform: scale(1.05);
}

.popular:hover {
    transform: scale(1.05) translateY(-5px);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 30px;
    background: var(--primary-color);
    color: #0f172a;
    padding: 6px 12px;
    border-radius: 0 0 8px 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.pricing-header {
    text-align: center;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 30px;
}

.plan-name {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.plan-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.price {
    display: flex;
    justify-content: center;
    align-items: baseline;
}

.currency {
    font-size: 1.5rem;
    font-weight: 500;
}

.amount {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.period {
    color: var(--text-secondary);
}

.plan-features {
    list-style: none;
    margin-bottom: 40px;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.plan-features i {
    color: var(--success-color);
    font-size: 1.2rem;
}

/* 用户评价 */
.reviews-grid {
    grid-template-columns: repeat(3, 1fr);
}

.review-stars {
    color: #fbbf24;
    margin-bottom: 16px;
}

.review-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 24px;
    flex-grow: 1;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.user-info h4 {
    font-size: 1rem;
}

.user-info span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* 常见问题 */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--glass-border);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
}

.faq-question i {
    transition: transform 0.3s ease;
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding-bottom: 24px;
    color: var(--text-secondary);
}

/* 知识库 */
.kb-grid {
    grid-template-columns: repeat(4, 1fr);
}

.kb-card {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.kb-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.kb-content h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
    transition: var(--transition);
}

.kb-card:hover .kb-content h3 {
    color: var(--primary-color);
}

.kb-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* CTA区块 */
.cta-section {
    padding: 120px 0;
}

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

.mt-4 {
    margin-top: 30px;
}

/* 页脚 */
.footer {
    background: rgba(0, 0, 0, 0.3);
    padding: 80px 0 30px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 20px;
    max-width: 300px;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
    padding-left: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.social-links a {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--text-primary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid, .pricing-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .kb-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero h1 {
        font-size: 3.5rem;
    }
    .popular {
        transform: scale(1);
    }
    .popular:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 768px) {
    .nav-menu, .nav-actions {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero {
        padding-top: 120px;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    .features-grid, .pricing-grid, .reviews-grid, .kb-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}