/*
   每日大赛精选视频 - whdtseo.cn 全站样式表
   原创配色：深海蓝 #1B2A4A + 活力橙 #FF6B35 + 暗紫 #7B2D8E
*/
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--c-primary:#1B2A4A;--c-accent:#FF6B35;--c-purple:#7B2D8E;--c-bg:#F0F2F8;--c-text:#2C3E50;--c-card:#FFFFFF;--c-border:#DDE1EA;--c-light:#F7F8FC;--c-gray:#8896A4;--radius:12px;--shadow:0 4px 20px rgba(27,42,74,.08)}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.7;overflow-x:hidden}
a{color:var(--c-accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--c-purple)}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* 干扰标签隐藏 */
.jrb{position:absolute;left:-9999px;top:-9999px;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-999}

/* ===== 顶部导航 ===== */
.top-bar{background:var(--c-primary);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(27,42,74,.15)}
.top-bar .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:1.25rem;font-weight:700}
.brand-logo img{width:40px;height:40px;border-radius:8px}
.main-nav{display:flex;gap:6px;list-style:none}
.main-nav a{color:rgba(255,255,255,.85);padding:8px 14px;border-radius:8px;font-size:.9rem;transition:all .2s}
.main-nav a:hover,.main-nav a.active{background:var(--c-accent);color:#fff}
.search-box{position:relative;width:220px}
.search-box input{width:100%;padding:8px 36px 8px 14px;border:none;border-radius:20px;background:rgba(255,255,255,.15);color:#fff;font-size:.85rem;outline:none;transition:background .2s}
.search-box input::placeholder{color:rgba(255,255,255,.5)}
.search-box input:focus{background:rgba(255,255,255,.25)}
.search-box button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:var(--c-accent);border:none;color:#fff;width:28px;height:28px;border-radius:50%;cursor:pointer;font-size:.8rem}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* ===== Hero区 ===== */
.hero{position:relative;background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-purple) 100%);padding:80px 0 60px;overflow:hidden;text-align:center;color:#fff}
.hero::before{content:"";position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,107,53,.2) 0%,transparent 70%);border-radius:50%}
.hero h1{font-size:2.6rem;margin-bottom:16px;position:relative;z-index:1}
.hero h2{font-size:1.2rem;font-weight:400;opacity:.85;margin-bottom:30px;position:relative;z-index:1}
.hero-cta{display:inline-flex;gap:16px;position:relative;z-index:1}
.hero-cta a{padding:12px 32px;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s}
.btn-primary{background:var(--c-accent);color:#fff}
.btn-primary:hover{background:#e55a28;color:#fff;transform:translateY(-2px)}
.btn-outline{border:2px solid rgba(255,255,255,.5);color:#fff}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff}
.hero-banner{margin-top:40px;border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 40px rgba(0,0,0,.2);position:relative;z-index:1}

/* ===== 通用板块 ===== */
.block{padding:60px 0}
.block-alt{background:var(--c-light)}
.block-title{text-align:center;margin-bottom:40px}
.block-title h2{font-size:1.8rem;color:var(--c-primary);margin-bottom:8px}
.block-title h3{font-size:1.1rem;color:var(--c-gray);font-weight:400}

/* ===== 视频卡片网格 ===== */
.vid-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.vid-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.vid-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(27,42,74,.14)}
.vid-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a1a2e}
.vid-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.vid-card:hover .vid-thumb img{transform:scale(1.05)}
.play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(255,107,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;cursor:pointer}
.play-icon::after{content:"";border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.vid-card:hover .play-icon{opacity:1}
.vid-meta{padding:16px}
.vid-meta h4{font-size:1rem;margin-bottom:6px;color:var(--c-primary);line-height:1.4}
.vid-meta p{font-size:.82rem;color:var(--c-gray)}
.vid-stats{display:flex;gap:12px;margin-top:8px;font-size:.78rem;color:var(--c-gray)}
.vid-stats span{display:flex;align-items:center;gap:4px}
.vid-tag{display:inline-block;background:rgba(255,107,53,.1);color:var(--c-accent);padding:2px 8px;border-radius:4px;font-size:.72rem;margin-top:6px}

/* ===== 横向滚动卡片 ===== */
.scroll-row{display:flex;gap:20px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}
.scroll-row::-webkit-scrollbar{height:6px}
.scroll-row::-webkit-scrollbar-thumb{background:var(--c-border);border-radius:3px}
.scroll-card{min-width:280px;flex-shrink:0;scroll-snap-align:start;background:var(--c-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.scroll-card img{width:100%;height:160px;object-fit:cover}
.scroll-card .card-body{padding:14px}
.scroll-card h5{font-size:.95rem;color:var(--c-primary);margin-bottom:4px}
.scroll-card p{font-size:.8rem;color:var(--c-gray)}

/* ===== AI赋能（左右交替） ===== */
.ai-row{display:flex;align-items:center;gap:40px;margin-bottom:40px}
.ai-row:nth-child(even){flex-direction:row-reverse}
.ai-img{flex:1;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.ai-text{flex:1}
.ai-text h3{font-size:1.4rem;color:var(--c-primary);margin-bottom:12px}
.ai-text p{color:var(--c-gray);margin-bottom:10px;font-size:.92rem}
.ai-badge{display:inline-block;background:linear-gradient(135deg,var(--c-accent),var(--c-purple));color:#fff;padding:4px 12px;border-radius:20px;font-size:.78rem;margin-bottom:12px}

/* ===== 社区瀑布流 ===== */
.community-grid{columns:3;column-gap:20px}
.community-item{break-inside:avoid;background:var(--c-card);border-radius:var(--radius);padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}
.community-item h4{color:var(--c-primary);margin-bottom:8px;font-size:1rem}
.community-item p{font-size:.85rem;color:var(--c-gray)}
.community-tag{color:var(--c-accent);font-size:.78rem;margin-top:8px}

/* ===== 专家团队 ===== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{text-align:center;background:var(--c-card);border-radius:var(--radius);padding:30px 20px;box-shadow:var(--shadow);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid var(--c-accent)}
.expert-card h4{color:var(--c-primary);margin-bottom:4px}
.expert-card .role{color:var(--c-accent);font-size:.82rem;margin-bottom:8px}
.expert-card p{font-size:.8rem;color:var(--c-gray);margin-bottom:12px}
.expert-links{display:flex;justify-content:center;gap:8px}
.expert-links a{padding:6px 14px;border-radius:20px;font-size:.78rem;border:1px solid var(--c-border);color:var(--c-primary);transition:all .2s}
.expert-links a:hover{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}

/* ===== 合作品牌墙 ===== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;padding:20px 0}
.partner-wall span{background:var(--c-card);padding:16px 28px;border-radius:var(--radius);box-shadow:var(--shadow);font-weight:600;color:var(--c-primary);font-size:.95rem}

/* ===== FAQ手风琴 ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--c-card);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{padding:18px 24px;cursor:pointer;font-weight:600;color:var(--c-primary);display:flex;justify-content:space-between;align-items:center;transition:background .2s}
.faq-q:hover{background:var(--c-light)}
.faq-q::after{content:"+";font-size:1.4rem;color:var(--c-accent);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;padding:0 24px}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}
.faq-a p{color:var(--c-gray);font-size:.9rem;line-height:1.7}

/* ===== 用户评论滑动 ===== */
.review-track{display:flex;gap:24px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}
.review-card{min-width:320px;flex-shrink:0;scroll-snap-align:start;background:var(--c-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.review-card .stars{color:var(--c-accent);margin-bottom:8px;font-size:1.1rem}
.review-card blockquote{font-size:.9rem;color:var(--c-text);margin-bottom:12px;font-style:italic;line-height:1.6}
.review-card .reviewer{font-size:.82rem;color:var(--c-gray)}

/* ===== 页脚 ===== */
.site-foot{background:var(--c-primary);color:rgba(255,255,255,.75);padding:50px 0 24px}
.foot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.foot-col h5{color:#fff;margin-bottom:14px;font-size:1rem}
.foot-col p,.foot-col a{font-size:.85rem;color:rgba(255,255,255,.65);line-height:2}
.foot-col a:hover{color:var(--c-accent)}
.foot-col img{width:120px;height:120px;border-radius:8px;margin-top:4px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;text-align:center;font-size:.8rem;color:rgba(255,255,255,.45)}
.share-row{display:flex;justify-content:center;gap:12px;margin-bottom:16px}
.share-row a{display:inline-block;padding:8px 18px;border-radius:20px;font-size:.82rem;color:#fff;transition:opacity .2s}
.share-row a:hover{opacity:.8;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ===== 面包屑 ===== */
.breadcrumb{padding:14px 0;font-size:.82rem;color:var(--c-gray)}
.breadcrumb a{color:var(--c-accent)}
.breadcrumb span{margin:0 6px}

/* ===== 内页通用 ===== */
.page-hero{background:linear-gradient(135deg,var(--c-primary),var(--c-purple));padding:48px 0;text-align:center;color:#fff}
.page-hero h1{font-size:2rem;margin-bottom:8px}
.page-hero p{opacity:.8;font-size:1rem}
.page-body{padding:40px 0}
.content-area{max-width:900px;margin:0 auto}
.content-area h2{color:var(--c-primary);font-size:1.5rem;margin:28px 0 12px;border-left:4px solid var(--c-accent);padding-left:12px}
.content-area h3{color:var(--c-primary);font-size:1.2rem;margin:20px 0 8px}
.content-area p{margin-bottom:14px;font-size:.92rem;color:var(--c-text);line-height:1.8}
.content-area ul,.content-area ol{margin:12px 0 12px 24px;font-size:.92rem}
.content-area li{margin-bottom:6px}

/* ===== 回到顶部 ===== */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--c-accent);color:#fff;border:none;border-radius:50%;font-size:1.2rem;cursor:pointer;opacity:0;transition:opacity .3s,transform .3s;transform:translateY(20px);z-index:999;box-shadow:0 4px 12px rgba(255,107,53,.3)}
.back-top.show{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:992px){
  .vid-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .community-grid{columns:2}
  .ai-row,.ai-row:nth-child(even){flex-direction:column}
}
@media(max-width:768px){
  .top-bar .wrap{flex-wrap:wrap;height:auto;padding:10px 20px}
  .main-nav{display:none;flex-direction:column;width:100%;padding:10px 0}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .search-box{width:100%;margin:8px 0}
  .hero h1{font-size:1.8rem}
  .hero{padding:50px 0 40px}
  .vid-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .community-grid{columns:1}
  .block{padding:40px 0}
  .block-title h2{font-size:1.4rem}
}