/* ============================================
   糖心vlog 全新样式 - 迪迦奥特曼风格
   配色：紫#6C3BF5 红#E63946 金#FFD700 深蓝黑#0B0E1A
   ============================================ */
*{margin:0;padding:0;box-sizing:border-box}
:root{--tiga-purple:#6C3BF5;--tiga-red:#E63946;--tiga-gold:#FFD700;--bg-deep:#0B0E1A;--bg-card:#141830;--bg-card2:#1A1F3D;--text-main:#E8E8F0;--text-sub:#A0A4C0;--radius:12px;--shadow:0 4px 24px rgba(108,59,245,.15)}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;background:var(--bg-deep);color:var(--text-main);line-height:1.7;overflow-x:hidden}
a{color:var(--tiga-purple);text-decoration:none;transition:color .3s}
a:hover{color:var(--tiga-gold)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1280px;margin:0 auto;padding:0 20px}

/* 导航栏 - 透明渐变 */
.site-nav{position:fixed;top:0;left:0;width:100%;z-index:1000;background:linear-gradient(180deg,rgba(11,14,26,.95) 0%,rgba(11,14,26,.7) 100%);backdrop-filter:blur(12px);border-bottom:1px solid rgba(108,59,245,.2);transition:all .3s}
.site-nav .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-brand{display:flex;align-items:center;gap:10px}
.nav-brand .nav-icon{width:36px;height:36px;border-radius:8px}
.nav-brand .brand-text{font-size:1.25rem;font-weight:700;background:linear-gradient(135deg,var(--tiga-purple),var(--tiga-red));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-links a{color:var(--text-main);font-size:.95rem;position:relative;padding:4px 0}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--tiga-gold);transition:width .3s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-search-btn{background:none;border:1px solid rgba(108,59,245,.4);color:var(--text-sub);padding:6px 14px;border-radius:20px;cursor:pointer;font-size:.85rem;transition:all .3s}
.nav-search-btn:hover{border-color:var(--tiga-purple);color:var(--text-main)}
.nav-toggle{display:none;background:none;border:none;color:var(--text-main);font-size:1.5rem;cursor:pointer}

/* 搜索弹窗 */
.search-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(11,14,26,.92);z-index:2000;align-items:center;justify-content:center}
.search-overlay.active{display:flex}
.search-box{width:90%;max-width:640px;position:relative}
.search-box input{width:100%;padding:18px 60px 18px 24px;font-size:1.1rem;border:2px solid var(--tiga-purple);border-radius:40px;background:var(--bg-card);color:var(--text-main);outline:none}
.search-box button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:linear-gradient(135deg,var(--tiga-purple),var(--tiga-red));border:none;color:#fff;width:44px;height:44px;border-radius:50%;cursor:pointer;font-size:1.1rem}
.search-close{position:absolute;top:30px;right:40px;background:none;border:none;color:var(--text-sub);font-size:2rem;cursor:pointer}

/* Hero区域 - 全屏视觉 */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;text-align:center}
.hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.45}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(180deg,rgba(11,14,26,.3) 0%,rgba(11,14,26,.8) 70%,var(--bg-deep) 100%)}
.hero-content{position:relative;z-index:2;max-width:800px;padding:0 20px}
.hero-content h1{font-size:3.2rem;font-weight:800;margin-bottom:16px;line-height:1.2}
.hero-content h1 .highlight{background:linear-gradient(135deg,var(--tiga-gold),var(--tiga-red));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-content p{font-size:1.15rem;color:var(--text-sub);margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:32px}
.hero-tags span{background:rgba(108,59,245,.15);border:1px solid rgba(108,59,245,.3);padding:6px 16px;border-radius:20px;font-size:.85rem;color:var(--tiga-gold)}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{background:linear-gradient(135deg,var(--tiga-purple),var(--tiga-red));color:#fff;padding:14px 36px;border-radius:30px;font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:transform .3s,box-shadow .3s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(108,59,245,.4);color:#fff}
.btn-outline{border:2px solid var(--tiga-gold);color:var(--tiga-gold);padding:12px 34px;border-radius:30px;font-size:1rem;font-weight:600;transition:all .3s}
.btn-outline:hover{background:var(--tiga-gold);color:var(--bg-deep)}

/* 通用区块 */
.section{padding:80px 0}
.section-header{text-align:center;margin-bottom:50px}
.section-header h2{font-size:2rem;font-weight:700;margin-bottom:12px}
.section-header h2 .accent{color:var(--tiga-gold)}
.section-header p{color:var(--text-sub);font-size:1rem;max-width:600px;margin:0 auto}
.section-divider{width:60px;height:3px;background:linear-gradient(90deg,var(--tiga-purple),var(--tiga-red));margin:16px auto 0;border-radius:2px}

/* 视频瀑布流3列 */
.video-waterfall{columns:3;column-gap:20px}
.video-card{break-inside:avoid;margin-bottom:20px;background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(108,59,245,.1);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.video-thumb{position:relative;overflow:hidden;cursor:pointer}
.video-thumb video,.video-thumb img{width:100%;display:block;transition:transform .4s}
.video-card:hover .video-thumb video,.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-thumb .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(108,59,245,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-thumb .play-btn::after{content:'';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-thumb .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.7);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-thumb .badge-live{position:absolute;top:8px;left:8px;background:var(--tiga-red);color:#fff;padding:3px 10px;border-radius:4px;font-size:.72rem;font-weight:600}
.video-info{padding:14px}
.video-info h3{font-size:.95rem;font-weight:600;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:var(--text-sub)}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.video-tags span{background:rgba(108,59,245,.1);color:var(--tiga-purple);padding:2px 10px;border-radius:10px;font-size:.72rem}
.video-desc{font-size:.82rem;color:var(--text-sub);margin-top:6px;line-height:1.5}

/* 左右交替图文 */
.alt-section{display:flex;align-items:center;gap:50px;margin-bottom:60px}
.alt-section.reverse{flex-direction:row-reverse}
.alt-img{flex:1;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.alt-img img{width:100%;transition:transform .4s}
.alt-img:hover img{transform:scale(1.03)}
.alt-text{flex:1}
.alt-text h3{font-size:1.5rem;font-weight:700;margin-bottom:12px}
.alt-text h3 .accent{color:var(--tiga-gold)}
.alt-text p{color:var(--text-sub);margin-bottom:16px;line-height:1.8}
.alt-text .tag-list{display:flex;flex-wrap:wrap;gap:8px}
.alt-text .tag-list span{background:rgba(230,57,70,.1);color:var(--tiga-red);padding:4px 14px;border-radius:16px;font-size:.82rem}

/* 横向滚动专家卡片 */
.expert-scroll{display:flex;gap:24px;overflow-x:auto;padding-bottom:16px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.expert-scroll::-webkit-scrollbar{height:6px}
.expert-scroll::-webkit-scrollbar-track{background:var(--bg-card)}
.expert-scroll::-webkit-scrollbar-thumb{background:var(--tiga-purple);border-radius:3px}
.expert-card{min-width:280px;background:var(--bg-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid rgba(108,59,245,.1);scroll-snap-align:start;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--tiga-purple)}
.expert-card h4{font-size:1.05rem;font-weight:600;margin-bottom:4px}
.expert-card .role{color:var(--tiga-gold);font-size:.85rem;margin-bottom:10px}
.expert-card p{color:var(--text-sub);font-size:.82rem;line-height:1.6;margin-bottom:12px}
.expert-card .btn-sm{display:inline-block;padding:6px 20px;border:1px solid var(--tiga-purple);border-radius:20px;font-size:.82rem;color:var(--tiga-purple);transition:all .3s}
.expert-card .btn-sm:hover{background:var(--tiga-purple);color:#fff}

/* 双栏FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-item{background:var(--bg-card);border-radius:var(--radius);border:1px solid rgba(108,59,245,.1);overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:var(--tiga-purple)}
.faq-q{padding:18px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--tiga-purple);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:var(--text-sub);font-size:.88rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 20px 18px;max-height:300px}

/* 用户评价 */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;border:1px solid rgba(108,59,245,.1)}
.review-stars{color:var(--tiga-gold);font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card p{color:var(--text-sub);font-size:.88rem;line-height:1.6;margin-bottom:12px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--tiga-purple),var(--tiga-red));display:flex;align-items:center;justify-content:center;color:#fff;font-size:.85rem;font-weight:600}
.review-name{font-size:.85rem;font-weight:600}
.review-date{font-size:.75rem;color:var(--text-sub)}

/* 联系区域 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:var(--bg-card);border-radius:var(--radius);padding:32px;border:1px solid rgba(108,59,245,.1)}
.contact-info h3{font-size:1.3rem;margin-bottom:20px}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;color:var(--text-sub);font-size:.9rem}
.contact-item strong{color:var(--text-main)}
.contact-qr{display:flex;gap:24px;justify-content:center}
.contact-qr .qr-box{text-align:center}
.contact-qr .qr-box img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-box span{font-size:.82rem;color:var(--text-sub)}

/* 品牌墙 */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:var(--bg-card);padding:16px 28px;border-radius:var(--radius);border:1px solid rgba(108,59,245,.1);font-size:.9rem;color:var(--text-sub);transition:all .3s}
.brand-wall .brand-item:hover{border-color:var(--tiga-gold);color:var(--tiga-gold)}

/* 文章卡片 */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.article-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(108,59,245,.1);transition:transform .3s}
.article-card:hover{transform:translateY(-4px)}
.article-card img{width:100%;height:180px;object-fit:cover}
.article-card .article-body{padding:18px}
.article-card h4{font-size:1rem;font-weight:600;margin-bottom:8px}
.article-card p{color:var(--text-sub);font-size:.85rem;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.article-card .article-meta{display:flex;justify-content:space-between;margin-top:12px;font-size:.78rem;color:var(--text-sub)}

/* 社区互动 */
.community-banner{position:relative;border-radius:var(--radius);overflow:hidden;padding:60px 40px;text-align:center}
.community-banner img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.3}
.community-banner .overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(108,59,245,.6),rgba(230,57,70,.4))}
.community-banner .content{position:relative;z-index:2}
.community-banner h3{font-size:1.8rem;font-weight:700;margin-bottom:12px}
.community-banner p{color:rgba(255,255,255,.85);margin-bottom:24px;max-width:500px;margin-left:auto;margin-right:auto}
.community-features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.community-features .feat{background:rgba(255,255,255,.08);border-radius:8px;padding:16px;backdrop-filter:blur(4px)}
.community-features .feat h5{font-size:.95rem;margin-bottom:4px}
.community-features .feat p{font-size:.8rem;color:rgba(255,255,255,.7)}

/* 分享按钮 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-bar a{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;color:#fff;transition:transform .3s}
.share-bar a:hover{transform:translateY(-2px);color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* 面包屑 */
.breadcrumb{padding:80px 0 10px;font-size:.85rem;color:var(--text-sub)}
.breadcrumb a{color:var(--tiga-purple)}
.breadcrumb span{margin:0 6px;color:var(--text-sub)}

/* 页脚 */
.site-footer{background:var(--bg-card);border-top:1px solid rgba(108,59,245,.15);padding:50px 0 0}
.footer-main{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand img{width:140px;margin-bottom:12px}
.footer-brand p{color:var(--text-sub);font-size:.85rem;line-height:1.6}
.footer-col h4{font-size:1rem;font-weight:600;margin-bottom:16px;color:var(--tiga-gold)}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{color:var(--text-sub);font-size:.88rem;transition:color .3s}
.footer-col ul li a:hover{color:var(--tiga-gold)}
.footer-bottom{border-top:1px solid rgba(108,59,245,.1);padding:20px 0;text-align:center;font-size:.82rem;color:var(--text-sub)}

/* 回到顶部 */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:linear-gradient(135deg,var(--tiga-purple),var(--tiga-red));border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;z-index:999;border:none}
.back-top.visible{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(108,59,245,.4)}

/* 响应式 */
@media(max-width:1024px){
.video-waterfall{columns:2}
.review-grid{grid-template-columns:repeat(2,1fr)}
.footer-main{grid-template-columns:1fr 1fr}
.article-grid{grid-template-columns:repeat(2,1fr)}
.community-features{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.nav-links{display:none;position:absolute;top:68px;left:0;width:100%;background:rgba(11,14,26,.98);flex-direction:column;padding:20px;gap:16px}
.nav-links.active{display:flex}
.nav-toggle{display:block}
.hero-content h1{font-size:2rem}
.video-waterfall{columns:1}
.alt-section,.alt-section.reverse{flex-direction:column}
.faq-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-main{grid-template-columns:1fr}
.article-grid{grid-template-columns:1fr}
.community-features{grid-template-columns:1fr 1fr}
.expert-card{min-width:240px}
}
@media(max-width:480px){
.hero-content h1{font-size:1.6rem}
.hero-btns{flex-direction:column;align-items:center}
.community-features{grid-template-columns:1fr}
}