:root {
    --bg-color: #0b0f19;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-1: #00f2fe;
    --accent-2: #4facfe;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}

/* 动态背景光晕 */
.bg-glow {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(0,242,254,0.15) 0%, rgba(11,15,25,0) 70%);
    z-index: -1;
    border-radius: 50%;
    animation: float 10s infinite alternate;
}
.bg-glow.right {
    top: 40%;
    left: auto;
    right: -20%;
    background: radial-gradient(circle, rgba(79,172,254,0.1) 0%, rgba(11,15,25,0) 70%);
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(30px) scale(1.1); }
}

/* 悬浮玻璃态导航 */
header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    background: rgba(11, 15, 25, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: 2px;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-1);
}

/* 主视觉区：沉浸式 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 5%;
    position: relative;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 3rem;
}

/* 霓虹按钮 */
.cta-btn {
    display: inline-block;
    padding: 16px 40px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    color: #000;
    font-weight: bold;
    font-size: 1.1rem;
    text-decoration: none;
    border-radius: 30px;
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.6);
}

/* Bento Box 布局 (便当盒式卡片) */
.container {
    max-width: 1200px;
    margin: 0 auto 8rem;
    padding: 0 5%;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--accent-1);
    border-radius: 2px;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 250px;
    gap: 1.5rem;
}

.bento-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2rem;
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.bento-item::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s;
}

.bento-item:hover::before {
    opacity: 1;
}

.bento-item:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 242, 254, 0.3);
}

.bento-large {
    grid-column: span 2;
}

.bento-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #fff;
    z-index: 1;
}

.bento-item p {
    color: var(--text-muted);
    z-index: 1;
}

.bento-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* 价格卡片悬浮风 */
.price-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.price-card {
    width: calc(33.333% - 1.35rem);
    min-width: 280px;
    background: rgba(11, 15, 25, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.price-card.popular {
    background: linear-gradient(180deg, rgba(0,242,254,0.05) 0%, rgba(11,15,25,0) 100%);
    border: 1px solid var(--accent-2);
}

.badge {
    position: absolute;
    top: 15px;
    right: -30px;
    background: var(--accent-1);
    color: #000;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: bold;
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 900;
    margin: 1.5rem 0;
    color: #fff;
}

.price-amount span {
    font-size: 1.2rem;
    color: var(--text-muted);
}

.price-card ul {
    list-style: none;
    margin-bottom: 2.5rem;
    text-align: left;
}

.price-card li {
    margin-bottom: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
}

.price-card li::before {
    content: '✓';
    color: var(--accent-1);
    margin-right: 10px;
    font-weight: bold;
}

/* 文章幻灯片式网格 */
.article-masonry {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.article-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--card-border);
    border-top: 3px solid var(--accent-1);
    transition: transform 0.3s;
    position: relative;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 242, 254, 0.1);
}

.article-content {
    padding: 2rem 1.5rem;
}

.article-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.article-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.article-content a {
    color: var(--accent-1);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: bold;
}

/* 手风琴式 FAQ (纯CSS实现) */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    margin-bottom: 1rem;
    padding: 1.5rem;
}

.faq-item h3 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.faq-item p {
    color: var(--text-muted);
}

/* 页脚 */
footer {
    border-top: 1px solid var(--card-border);
    padding: 4rem 5% 2rem;
    text-align: center;
    background: rgba(0,0,0,0.2);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: #fff;
}

.pbn-links {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.pbn-links p {
    color: #64748b;
    margin-bottom: 1rem;
}

.pbn-links a {
    color: var(--accent-2);
    text-decoration: none;
    margin: 0 10px;
    font-size: 0.9rem;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .bento-large {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2.8rem;
    }
    .bento-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: auto;
    }
    .bento-item {
        min-height: 200px;
    }
    .bento-large {
        grid-column: span 1;
    }
    .section-title {
        font-size: 2rem;
    }
}