/* 糖心vlog - 游戏解说视频社区 原创样式 */
/* 配色方案: 深空黑#0d0f1a 星际紫#2d1b69 珊瑚粉#ff6b6b 电光紫#8b5cf6 冰蓝#38bdf8 */

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

:root {
    --bg-primary: #0d0f1a;
    --bg-secondary: #1a1d2e;
    --bg-card: #242842;
    --accent-pink: #ff6b6b;
    --accent-purple: #8b5cf6;
    --accent-blue: #38bdf8;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --gradient-main: linear-gradient(135deg, #ff6b6b, #8b5cf6);
    --gradient-dark: linear-gradient(180deg, #0d0f1a, #1a1d2e);
    --radius: 12px;
    --shadow: 0 4px 24px rgba(139, 92, 246, 0.15);
}

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

a { color: var(--accent-blue); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--accent-pink); }

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

/* 头部导航 */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(13, 15, 26, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    padding: 12px 0;
}

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

.logo-wrap { display: flex; align-items: center; gap: 10px; }
.logo-wrap img { height: 42px; width: auto; border-radius: 8px; }
.logo-wrap span { font-size: 1.3rem; font-weight: 700; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.main-nav { display: flex; gap: 24px; align-items: center; }
.main-nav a { color: var(--text-secondary); font-size: 0.95rem; font-weight: 500; padding: 6px 0; position: relative; }
.main-nav a:hover, .main-nav a.active { color: var(--text-primary); }
.main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--gradient-main); transition: width 0.3s; }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }

/* 搜索框 */
.search-bar {
    position: relative; margin-left: 20px;
}
.search-bar input {
    background: var(--bg-secondary); border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px; padding: 8px 36px 8px 16px; color: var(--text-primary);
    font-size: 0.85rem; width: 200px; outline: none; transition: all 0.3s;
}
.search-bar input:focus { border-color: var(--accent-purple); width: 260px; }
.search-bar button {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    background: none; border: none; color: var(--accent-purple); cursor: pointer; font-size: 1rem;
}

/* Banner区域 */
.banner-section {
    position: relative; margin-top: 70px; height: 420px; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.banner-section::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to bottom, rgba(13,15,26,0.3), rgba(13,15,26,0.85));
    z-index: 1;
}
.banner-bg {
    position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.banner-content {
    position: relative; z-index: 2; text-align: center; padding: 40px 20px;
}
.banner-content h1 {
    font-size: 2.8rem; font-weight: 800; margin-bottom: 16px;
    background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.banner-content p { font-size: 1.15rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto 24px; }
.btn-primary {
    display: inline-block; padding: 12px 32px; background: var(--gradient-main);
    border-radius: 30px; color: #fff; font-weight: 600; font-size: 1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,107,0.3); color: #fff; }

/* 板块通用 */
.section-block { padding: 60px 0; }
.section-block:nth-child(even) { background: var(--bg-secondary); }
.section-title {
    text-align: center; margin-bottom: 40px;
}
.section-title h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.section-title p { color: var(--text-secondary); font-size: 0.95rem; }

/* 视频网格 */
.video-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.video-card {
    background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s; cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.video-thumb {
    position: relative; padding-top: 56.25%; overflow: hidden;
}
.video-thumb img {
    position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.4s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-btn {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 56px; height: 56px; background: rgba(139, 92, 246, 0.85);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: opacity 0.3s;
}
.play-btn::after {
    content: ''; width: 0; height: 0;
    border-left: 18px solid #fff; border-top: 11px solid transparent; border-bottom: 11px solid transparent;
    margin-left: 4px;
}
.video-card:hover .play-btn { opacity: 1; }
.video-info { padding: 16px; }
.video-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.video-meta { display: flex; gap: 12px; color: var(--text-secondary); font-size: 0.8rem; }
.video-tag {
    display: inline-block; padding: 3px 10px; background: rgba(139,92,246,0.15);
    border-radius: 12px; font-size: 0.75rem; color: var(--accent-purple); margin-top: 8px;
}

/* AI功能区 */
.ai-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px;
}
.ai-card {
    background: var(--bg-card); border-radius: var(--radius); padding: 28px;
    border: 1px solid rgba(139,92,246,0.15); transition: all 0.3s;
}
.ai-card:hover { border-color: var(--accent-purple); box-shadow: var(--shadow); }
.ai-card-icon { font-size: 2.2rem; margin-bottom: 16px; }
.ai-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.ai-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* 专家展示 */
.expert-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px;
}
.expert-card {
    background: var(--bg-card); border-radius: var(--radius); padding: 24px; text-align: center;
    transition: transform 0.3s;
}
.expert-card:hover { transform: translateY(-4px); }
.expert-card img { width: 90px; height: 90px; border-radius: 50%; object-fit: cover; margin-bottom: 16px; border: 3px solid var(--accent-purple); }
.expert-card h4 { font-size: 1rem; margin-bottom: 6px; }
.expert-card .role { color: var(--accent-pink); font-size: 0.85rem; margin-bottom: 10px; }
.expert-card p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.5; }
.expert-card .btn-sm {
    display: inline-block; margin-top: 12px; padding: 6px 18px;
    border: 1px solid var(--accent-purple); border-radius: 20px;
    font-size: 0.8rem; color: var(--accent-purple); transition: all 0.3s;
}
.expert-card .btn-sm:hover { background: var(--accent-purple); color: #fff; }

/* 社区模块 */
.community-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 20px;
}
.community-item {
    background: var(--bg-card); border-radius: var(--radius); padding: 20px; text-align: center;
    transition: all 0.3s; border: 1px solid transparent;
}
.community-item:hover { border-color: var(--accent-blue); transform: translateY(-3px); }
.community-item .icon { font-size: 2rem; margin-bottom: 10px; }
.community-item h4 { font-size: 0.9rem; margin-bottom: 6px; }
.community-item p { color: var(--text-secondary); font-size: 0.8rem; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card); border-radius: var(--radius); margin-bottom: 12px;
    overflow: hidden; border: 1px solid rgba(139,92,246,0.1);
}
.faq-question {
    padding: 18px 24px; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
    font-weight: 600; font-size: 0.95rem;
}
.faq-question::after { content: '+'; font-size: 1.4rem; color: var(--accent-purple); transition: transform 0.3s; }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-answer { padding: 0 24px 18px; color: var(--text-secondary); font-size: 0.9rem; display: none; }
.faq-item.active .faq-answer { display: block; }

/* 用户评价 */
.review-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.review-card {
    background: var(--bg-card); border-radius: var(--radius); padding: 24px;
    border-left: 3px solid var(--accent-purple);
}
.review-card .stars { color: #fbbf24; margin-bottom: 10px; font-size: 0.9rem; }
.review-card p { color: var(--text-secondary); font-size: 0.9rem; font-style: italic; margin-bottom: 12px; }
.review-card .reviewer { font-weight: 600; font-size: 0.85rem; color: var(--text-primary); }

/* How-To步骤 */
.howto-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; }
.howto-step {
    background: var(--bg-card); border-radius: var(--radius); padding: 24px; text-align: center;
}
.step-num {
    display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center;
    background: var(--gradient-main); border-radius: 50%; font-weight: 700; margin-bottom: 14px;
}
.howto-step h4 { margin-bottom: 8px; }
.howto-step p { color: var(--text-secondary); font-size: 0.85rem; }

/* 品牌墙 */
.brand-wall {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 30px; padding: 30px 0;
}
.brand-wall img { height: 48px; opacity: 0.6; transition: opacity 0.3s; filter: grayscale(1); }
.brand-wall img:hover { opacity: 1; filter: none; }

/* 联系我们 */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.contact-card {
    background: var(--bg-card); border-radius: var(--radius); padding: 24px;
}
.contact-card h4 { margin-bottom: 12px; color: var(--accent-blue); }
.contact-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 6px; }

/* 分享按钮 */
.share-btns { display: flex; gap: 12px; justify-content: center; margin-top: 30px; }
.share-btns a {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px;
    background: var(--bg-card); border-radius: 20px; font-size: 0.85rem;
    color: var(--text-secondary); border: 1px solid rgba(139,92,246,0.2); transition: all 0.3s;
}
.share-btns a:hover { border-color: var(--accent-purple); color: var(--text-primary); }

/* 页脚 */
.site-footer {
    background: var(--bg-secondary); border-top: 1px solid rgba(139,92,246,0.15);
    padding: 50px 0 20px;
}
.footer-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 30px;
    margin-bottom: 30px;
}
.footer-col h4 { font-size: 1rem; margin-bottom: 14px; color: var(--text-primary); }
.footer-col p, .footer-col a { display: block; color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 8px; }
.footer-col a:hover { color: var(--accent-pink); }
.footer-qr { display: flex; gap: 16px; }
.footer-qr img { width: 100px; height: 100px; border-radius: 8px; }
.footer-bottom {
    text-align: center; padding-top: 20px; border-top: 1px solid rgba(139,92,246,0.1);
    color: var(--text-secondary); font-size: 0.8rem;
}

/* 面包屑 */
.breadcrumb {
    padding: 16px 0; font-size: 0.85rem; color: var(--text-secondary);
}
.breadcrumb a { color: var(--accent-blue); }
.breadcrumb span { margin: 0 8px; }

/* 响应式 */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; gap: 10px; }
    .main-nav { gap: 14px; font-size: 0.85rem; overflow-x: auto; }
    .search-bar input { width: 150px; }
    .search-bar input:focus { width: 180px; }
    .banner-section { height: 320px; }
    .banner-content h1 { font-size: 1.8rem; }
    .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
    .section-block { padding: 40px 0; }
    .footer-grid { grid-template-columns: 1fr; }
    .share-btns { flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .main-nav { display: none; }
    .banner-content h1 { font-size: 1.5rem; }
    .video-grid { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: 1fr; }
}