/* 极简全局重置 - 科技风 Dashboard 布局 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #e2e8f0;
    background-color: #0b0f19;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

h1, h2, h3, h4 {
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    border-left: 4px solid #00f2fe;
    padding-left: 15px;
}

/* 按钮组件 */
.cta-btn {
    display: inline-block;
    background: linear-gradient(135deg, #0061ff 0%, #60efff 100%);
    color: #fff !important;
    padding: 12px 28px;
    border-radius: 8px; /* 扁平化圆角 */
    font-weight: 600;
    text-align: center;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
    transition: all 0.3s ease;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

.cta-btn.outline {
    background: transparent;
    border: 1px solid #00f2fe;
    color: #00f2fe !important;
    box-shadow: none;
}

.cta-btn.outline:hover {
    background: rgba(0, 242, 254, 0.1);
}

.cta-btn.sm { padding: 10px 15px; font-size: 0.9rem; }
.cta-btn.lg { padding: 16px 45px; font-size: 1.2rem; }
.cta-btn.full-width { width: 100%; }

/* 全局布局：侧边栏 + 主体内容 */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* 左侧固定导航 */
.sidebar-nav {
    width: 260px;
    background: #070a10;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    position: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 40px 20px;
    z-index: 100;
}

.sidebar-nav .logo {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 50px;
    text-align: center;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex: 1;
}

.nav-links a {
    padding: 12px 20px;
    border-radius: 8px;
    color: #94a3b8;
    font-weight: 500;
}

.nav-links a:hover {
    background: rgba(0, 242, 254, 0.1);
    color: #00f2fe;
}

.nav-footer {
    margin-top: auto;
}

/* 右侧主体内容 */
.main-content {
    flex: 1;
    margin-left: 260px; /* 留出侧边栏宽度 */
    padding: 0 60px;
    max-width: 1400px;
}

.section {
    padding: 80px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.section:last-child { border-bottom: none; }

/* 主视觉区 - 居中结构 */
.hero-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
    background: radial-gradient(circle at center, rgba(0,242,254,0.05) 0%, transparent 60%);
}

.hero-text h1 {
    font-size: 4rem;
    line-height: 1.2;
    margin-bottom: 25px;
}

.hero-text .subtitle {
    font-size: 1.3rem;
    color: #94a3b8;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-tags-row {
    display: flex;
    gap: 20px;
    margin-top: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.tag-card {
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid rgba(0, 242, 254, 0.2);
    padding: 12px 25px;
    border-radius: 30px;
    font-weight: bold;
    color: #00f2fe;
    backdrop-filter: blur(4px);
}

/* 核心优势与流媒体 - Bento Box 便当盒布局 */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: 25px;
}

.bento-item {
    background: #111827;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 30px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: transform 0.3s;
}
.bento-item:hover {
    transform: translateY(-5px);
    background: #161f33;
    border-color: rgba(0, 242, 254, 0.3);
}

.bento-item .icon {
    font-size: 2.5rem;
    line-height: 1;
}

.bento-item p { color: #94a3b8; font-size: 0.95rem; }

/* 流媒体跨两列，做成大图文块 */
.media-block {
    grid-column: span 2;
    grid-row: span 2;
    background: linear-gradient(145deg, #1f2937 0%, #0b0f19 100%);
    border: 1px solid rgba(0, 242, 254, 0.2);
    flex-direction: column;
}

.media-block .media-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 25px;
}

.media-logos span {
    background: rgba(0, 242, 254, 0.1);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #e2e8f0;
    border-left: 3px solid #00f2fe;
}

/* 套餐价格 - 横向并排紧凑布局 */
.pricing-horizontal-layout {
    display: flex;
    gap: 25px;
    align-items: stretch;
}

.pricing-card {
    flex: 1;
    background: #111827;
    padding: 40px 30px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    background: #1f2937;
    border: 1px solid #00f2fe;
    position: relative;
    transform: scale(1.02);
    z-index: 2;
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: #00f2fe;
    color: #000;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
}

.pricing-card .price span { font-size: 1rem; color: #64748b; }
.pricing-card ul { list-style: none; margin-bottom: 30px; flex: 1; }
.pricing-card ul li {
    padding: 8px 0;
    color: #cbd5e1;
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.pricing-card .cta-btn { margin-top: auto; }

/* 双栏拆分布局 (Split View) */
.split-view-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.split-left {
    flex: 6;
}

.split-right {
    flex: 4;
}

.split-half {
    flex: 1;
}

/* 长文章 */
.long-article-container {
    background: #111827;
    padding: 40px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
}
.long-article-container .content {
    color: #cbd5e1;
    font-size: 1.05rem;
    line-height: 1.8;
}
.long-article-container .content p { margin-bottom: 15px; }

/* 侧边栏文章瀑布流 */
.article-list-sidebar {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 800px;
    overflow-y: auto;
    padding-right: 10px;
}
/* 自定义滚动条 */
.article-list-sidebar::-webkit-scrollbar { width: 6px; }
.article-list-sidebar::-webkit-scrollbar-track { background: #0b0f19; }
.article-list-sidebar::-webkit-scrollbar-thumb { background: #334155; border-radius: 10px; }

.article-card {
    background: #111827;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.02);
}
.article-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.article-card p { font-size: 0.9rem; color: #64748b; margin: 0; }
.article-card a { color: #00f2fe; text-decoration: underline; }

/* FAQ 与 评价列表 */
.faq-list, .reviews-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.faq-item, .review-card {
    background: #111827;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.05);
}

.review-card .stars { color: #00f2fe; margin-bottom: 10px; }
.review-card .reviewer { color: #94a3b8; font-size: 0.9rem; margin-top: 10px; }

/* 页脚 */
.footer {
    padding: 60px 0;
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.footer-links {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}
.footer-links a { color: #94a3b8; }
.pbn-links-copyright p { color: #475569; margin-bottom: 10px; }
.pbn-link { color: #38bdf8; margin-right: 15px; }
.pbn-link:hover { color: #00f2fe; text-decoration: underline; }

/* 响应式适配 */
@media (max-width: 1024px) {
    .sidebar-nav { width: 80px; padding: 30px 10px; }
    .sidebar-nav .logo, .sidebar-nav .nav-links a { font-size: 0; text-align: center; }
    .sidebar-nav .nav-links a::before { content: '•'; font-size: 1.5rem; }
    .sidebar-nav .nav-footer { display: none; }
    .main-content { margin-left: 80px; padding: 0 30px; }
    .bento-grid { grid-template-columns: 1fr 1fr; }
    .split-view-layout { flex-direction: column; }
    .pricing-horizontal-layout { flex-direction: column; }
}
@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    .sidebar-nav {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: row;
        padding: 15px;
        align-items: center;
        justify-content: space-between;
    }
    .sidebar-nav .logo { font-size: 1.5rem; margin: 0; }
    .sidebar-nav .nav-links { display: none; }
    .main-content { margin-left: 0; padding: 0 15px; }
    .hero-text h1 { font-size: 2.5rem; }
    .bento-grid { grid-template-columns: 1fr; }
    .media-block { grid-column: 1; }
}