/* 暗黑风 + 毛玻璃 + Bento(便当盒) 布局 */
:root {
    --primary: #00f0ff;
    --secondary: #7000ff;
    --bg-color: #08080b;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.08);
    --text-main: #f5f5f7;
    --text-muted: #86868b;
    --font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

/* 炫光背景效果 */
body::before, body::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -1;
    opacity: 0.15;
}
body::before {
    top: -200px;
    left: -200px;
    background: var(--primary);
}
body::after {
    top: 50vh;
    right: -200px;
    background: var(--secondary);
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

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

.section {
    padding: 100px 0;
    position: relative;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    font-weight: 700;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 椭圆形悬浮导航栏 */
.navbar-wrapper {
    position: fixed;
    top: 25px;
    width: 100%;
    display: flex;
    justify-content: center;
    z-index: 1000;
}

.navbar {
    background: rgba(15, 15, 18, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: 50px; /* 椭圆形状 */
    padding: 12px 30px;
    width: 90%;
    max-width: 900px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 35px;
}

.nav-links a {
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.nav-links a:hover {
    color: var(--primary);
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

/* Hero Section (居中聚光灯布局) */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 100px;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 10;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 30px;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 独特的霓虹 CTA 按钮 */
.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff !important;
    padding: 16px 45px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    box-shadow: 0 10px 30px rgba(112, 0, 255, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.cta-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    opacity: 0;
    z-index: -1;
    transition: var(--transition);
}

.cta-btn:hover::before {
    opacity: 1;
}

.cta-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 240, 255, 0.4);
}

.cta-btn.outline {
    background: transparent;
    border: 1px solid var(--primary);
    box-shadow: none;
    color: var(--primary) !important;
}

.cta-btn.outline:hover {
    background: rgba(0, 240, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

/* Bento Grid (便当盒布局 - 打破传统三列) */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 250px;
    gap: 20px;
}

.card {
    background: var(--surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 35px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: var(--surface-hover);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.feature-1 { grid-column: span 2; grid-row: span 2; justify-content: center; }
.feature-2 { grid-column: span 2; }
.feature-3 { grid-column: span 2; }

.card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    opacity: 0.9;
}
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #fff;
}
.card p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* 套餐表 (玻璃态毛玻璃卡片) */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: stretch;
}

.pricing-card {
    justify-content: flex-start;
    padding: 40px 30px;
    text-align: center;
}

.pricing-card.popular {
    background: linear-gradient(180deg, rgba(112, 0, 255, 0.1) 0%, var(--surface) 100%);
    border-color: rgba(112, 0, 255, 0.4);
    transform: scale(1.05);
    height: 100%;
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-5px);
    border-color: var(--primary);
}

.badge {
    position: absolute;
    top: 20px; right: 20px;
    background: var(--secondary);
    color: #fff;
    font-size: 0.75rem;
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 20px 0;
    color: #fff;
}
.price span {
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: 400;
}

.features-list {
    list-style: none;
    margin-bottom: 40px;
    text-align: left;
}
.features-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
}
.features-list li::before {
    content: '✓';
    color: var(--primary);
    margin-right: 10px;
    font-weight: bold;
}

/* 文章推荐与流媒体 - 采用瀑布流或交错网格 */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.article-card {
    justify-content: flex-start;
    padding: 30px;
}

.article-card h3 {
    font-size: 1.15rem;
    margin-bottom: 15px;
    background: linear-gradient(to right, #fff, #aaa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* FAQ 极简风 */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 25px 30px;
    margin-bottom: 20px;
}
.faq-item h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 12px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
    margin-top: 50px;
    background: rgba(0,0,0,0.3);
}
.footer-nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}
.footer-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
}
.footer-nav a:hover {
    color: var(--text-main);
}
.pbn-links a {
    position: relative;
    display: inline-block;
}
.pbn-links a::after {
    content: '';
    position: absolute;
    width: 100%; transform: scaleX(0);
    height: 1px; bottom: 0; left: 0;
    background-color: currentColor;
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}
.pbn-links a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* 响应式 */
@media (max-width: 1024px) {
    .bento-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-1 { grid-row: auto; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .pricing-card.popular { transform: none; }
    .pricing-card.popular:hover { transform: translateY(-5px); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .navbar { padding: 12px 20px; width: 95%; }
    .nav-links { display: none; }
    .hero-content h1 { font-size: 3rem; }
    .bento-grid { grid-template-columns: 1fr; }
    .feature-1, .feature-2, .feature-3 { grid-column: span 1; }
    .pricing-grid, .grid-3 { grid-template-columns: 1fr; }
}