/* ===== 丝瓜视频汽车改装视频社区 - 全站样式 ===== */
/* 品牌色: 深红 #8B1A1A  辅助色: #1a1a2e #16213e #0f3460 #e94560 */

/* === 重置与基础 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",Arial,sans-serif;color:#333;background:#f8f9fa;line-height:1.8;overflow-x:hidden}
a{color:#8B1A1A;text-decoration:none;transition:color .3s}
a:hover{color:#e94560}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;color:#1a1a2e;line-height:1.4}
h1{font-size:2.2rem}
h2{font-size:1.8rem}
h3{font-size:1.4rem}
h4{font-size:1.2rem}
h5{font-size:1.05rem}
h6{font-size:.95rem}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{display:inline-block;position:relative;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#8B1A1A,#e94560);border-radius:2px}
.section-title p{color:#666;margin-top:10px;font-size:.95rem}

/* === 头部导航 === */
.site-header{background:#1a1a2e;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo img{height:42px;width:auto}
.logo span{color:#fff;font-size:1.3rem;font-weight:700;white-space:nowrap}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#ccc;padding:8px 14px;border-radius:6px;font-size:.92rem;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(139,26,26,.6)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === 搜索栏 === */
.search-bar{background:#16213e;padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid #0f3460;border-right:none;border-radius:25px 0 0 25px;background:#1a1a2e;color:#fff;font-size:.95rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#e94560}
.search-box input::placeholder{color:#888}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#8B1A1A,#e94560);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* === Hero 主视觉 === */
.hero{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);color:#fff;padding:80px 0 70px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.03)"/><circle cx="50" cy="80" r="1" fill="rgba(255,255,255,0.04)"/></svg>');pointer-events:none}
.hero h1{font-size:2.8rem;margin-bottom:16px;position:relative}
.hero h1 .brand{color:#e94560;font-size:3.2rem}
.hero .subtitle{font-size:1.15rem;color:rgba(255,255,255,.8);max-width:700px;margin:0 auto 30px;line-height:1.8}
.hero .hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:20px}
.hero .hero-tags span{background:rgba(255,255,255,.1);padding:6px 16px;border-radius:20px;font-size:.85rem;color:rgba(255,255,255,.7);border:1px solid rgba(255,255,255,.15)}
.hero-stats{display:flex;justify-content:center;gap:50px;margin-top:35px}
.hero-stats .stat{text-align:center}
.hero-stats .stat .num{font-size:2rem;font-weight:700;color:#e94560}
.hero-stats .stat .label{font-size:.85rem;color:rgba(255,255,255,.6);margin-top:4px}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;background:#1a1a2e;overflow:hidden}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(139,26,26,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;cursor:pointer;border:3px solid rgba(255,255,255,.4)}
.video-play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .video-play-btn{opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-info{padding:14px 16px}
.video-info h3{font-size:1rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.video-info .meta{display:flex;justify-content:space-between;color:#999;font-size:.8rem}
.video-info .meta .views{color:#8B1A1A}

/* === 模块卡片 === */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.module-card{background:#fff;padding:30px 24px;border-radius:12px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:all .3s;border:1px solid #eee}
.module-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.12);border-color:#e94560}
.module-card .icon{font-size:2.5rem;margin-bottom:15px}
.module-card h4{margin-bottom:8px;color:#1a1a2e}
.module-card p{color:#666;font-size:.9rem;line-height:1.7}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:24px auto 16px;background:linear-gradient(135deg,#8B1A1A,#e94560);display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:#fff}
.expert-card h4{margin-bottom:4px}
.expert-card .role{color:#8B1A1A;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.85rem;padding:0 16px;line-height:1.6}
.expert-card .expert-actions{padding:16px;display:flex;gap:10px;justify-content:center}
.expert-card .expert-actions a{padding:6px 16px;border-radius:20px;font-size:.8rem;transition:all .3s}
.expert-card .expert-actions .btn-contact{background:#8B1A1A;color:#fff}
.expert-card .expert-actions .btn-contact:hover{background:#e94560}
.expert-card .expert-actions .btn-works{border:1px solid #8B1A1A;color:#8B1A1A}
.expert-card .expert-actions .btn-works:hover{background:#8B1A1A;color:#fff}

/* === 品牌墙 === */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.brand-wall .brand-item{background:#fff;padding:16px 28px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.06);font-size:1rem;font-weight:600;color:#555;transition:all .3s;border:1px solid #eee}
.brand-wall .brand-item:hover{border-color:#e94560;color:#8B1A1A;transform:scale(1.05)}

/* === How-To 指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;padding:30px 20px;border-radius:12px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-15px;left:50%;transform:translateX(-50%);width:36px;height:36px;background:linear-gradient(135deg,#8B1A1A,#e94560);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}
.howto-step h4{margin-top:10px;margin-bottom:8px}
.howto-step p{color:#666;font-size:.9rem;line-height:1.6}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1a1a2e;transition:background .3s}
.faq-question:hover{background:#f8f0f0}
.faq-question::after{content:'+';font-size:1.4rem;color:#8B1A1A;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{color:#666;line-height:1.8;font-size:.95rem}

/* === 用户评价 === */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;padding:24px;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.review-card .stars{color:#e94560;font-size:1.1rem;margin-bottom:10px}
.review-card blockquote{color:#555;font-size:.95rem;line-height:1.7;margin-bottom:14px;font-style:italic;border-left:3px solid #e94560;padding-left:14px}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#8B1A1A,#e94560);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .name{font-weight:600;font-size:.9rem}
.review-card .reviewer .date{color:#999;font-size:.8rem}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-info{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-info h4{margin-bottom:16px;color:#8B1A1A}
.contact-info p{color:#555;margin-bottom:10px;line-height:1.8}
.contact-qr{display:flex;gap:30px;justify-content:center;margin-top:20px}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-item p{font-size:.85rem;color:#666}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:16px;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:25px;color:#fff;font-size:.85rem;cursor:pointer;transition:opacity .3s;border:none}
.share-btn:hover{opacity:.8;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}

/* === MCP 服务 === */
.mcp-section{background:#1a1a2e;color:#fff;padding:40px 0}
.mcp-section h3{text-align:center;margin-bottom:20px}
.mcp-code{background:#0d1117;border-radius:10px;padding:20px;max-width:700px;margin:0 auto;font-family:'Courier New',monospace;font-size:.85rem;color:#c9d1d9;overflow-x:auto;line-height:1.7}
.mcp-code .comment{color:#8b949e}
.mcp-code .keyword{color:#ff7b72}
.mcp-code .string{color:#a5d6ff}
.mcp-code .func{color:#d2a8ff}

/* === 页脚 === */
.site-footer{background:#1a1a2e;color:#ccc;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:1rem}
.footer-col p{font-size:.9rem;line-height:1.8;color:#aaa}
.footer-col a{color:#aaa;display:block;padding:3px 0;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:#e94560}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:.85rem;color:#888}
.footer-bottom .update-time{color:#e94560}

/* === 面包屑 === */
.breadcrumb{background:#fff;padding:12px 0;border-bottom:1px solid #eee}
.breadcrumb a{color:#8B1A1A;font-size:.9rem}
.breadcrumb span{color:#999;font-size:.9rem}

/* === 干扰标签隐藏 === */
.noise-wrap{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* === 淡入动画 === */
.fade-in{opacity:1;transform:translateY(0);transition:opacity .6s ease,transform .6s ease}
.fade-in.js-ready{opacity:0;transform:translateY(20px)}
.fade-in.js-ready.visible{opacity:1;transform:translateY(0)}

/* === 社区分类 === */
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.category-card{background:linear-gradient(135deg,#1a1a2e,#16213e);color:#fff;padding:24px;border-radius:12px;text-align:center;transition:all .3s;cursor:pointer}
.category-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.2)}
.category-card .cat-icon{font-size:2.2rem;margin-bottom:12px}
.category-card h4{color:#fff;margin-bottom:6px}
.category-card p{color:rgba(255,255,255,.7);font-size:.85rem}
.category-card .count{color:#e94560;font-size:.8rem;margin-top:8px}

/* === 内页通用 === */
.page-hero{background:linear-gradient(135deg,#1a1a2e,#0f3460);color:#fff;padding:50px 0;text-align:center}
.page-hero h1{font-size:2.2rem;margin-bottom:10px}
.page-hero p{color:rgba(255,255,255,.7);font-size:1rem}
.page-content{padding:50px 0}
.content-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 15px rgba(0,0,0,.06);margin-bottom:24px}
.content-card h3{margin-bottom:16px;color:#1a1a2e}
.content-card p{color:#555;line-height:1.8;margin-bottom:12px}

/* === 响应式 === */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(2,1fr)}
.module-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.review-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:#1a1a2e;flex-direction:column;padding:20px;gap:4px;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.main-nav.show{display:flex}
.mobile-menu-btn{display:block}
.hero h1{font-size:1.8rem}
.hero h1 .brand{font-size:2rem}
.hero-stats{gap:25px}
.hero-stats .stat .num{font-size:1.4rem}
.video-grid{grid-template-columns:1fr}
.module-grid{grid-template-columns:1fr}
.expert-grid{grid-template-columns:1fr}
.category-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
h1{font-size:1.6rem}
h2{font-size:1.4rem}
.section{padding:40px 0}
}
@media(max-width:480px){
.logo span{font-size:1rem}
.search-box input{padding:8px 14px;font-size:.85rem}
.search-box button{padding:8px 16px;font-size:.85rem}
.hero{padding:50px 0 40px}
.share-bar{flex-wrap:wrap}
}