/* ============================================
   四虎视频 全新原创样式 - 星夜紫粉主题
   域名: kelelang.cn
   ============================================ */

/* === 基础重置与全局 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-pri:#8b5cf6;--c-pri-d:#7c3aed;--c-sec:#ec4899;--c-sec-l:#f472b6;
  --c-acc:#fbbf24;--c-bg:#0f0b1e;--c-bg2:#1a1333;--c-bg3:#251d47;
  --c-card:#1e1640;--c-txt:#e8e0f5;--c-txt2:#b8a9d4;--c-bdr:#3b2d6b;
  --c-grad:linear-gradient(135deg,#8b5cf6,#ec4899);
  --c-grad2:linear-gradient(135deg,#1a1333,#251d47);
  --radius:12px;--shadow:0 4px 24px rgba(139,92,246,.15);
  --font:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--c-bg);color:var(--c-txt);line-height:1.7;overflow-x:hidden}
a{color:var(--c-sec-l);text-decoration:none;transition:color .3s}
a:hover{color:var(--c-acc)}
img{max-width:100%;height:auto;display:block}
.kr-wrap{max-width:1240px;margin:0 auto;padding:0 20px}

/* === 导航栏 === */
.fs4-bar{position:fixed;top:0;left:0;width:100%;z-index:999;background:rgba(15,11,30,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-bdr);transition:all .3s}
.fs4-inner{display:flex;align-items:center;justify-content:space-between;max-width:1240px;margin:0 auto;padding:8px 20px}
.fs4-logo{display:flex;align-items:center;gap:10px}
.fs4-logo img{height:40px;width:auto}
.fs4-logo span{font-size:1.35rem;font-weight:700;background:var(--c-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.fs4-menu{display:flex;lipl67-style:none;gap:6px}
.fs4-menu a{padding:8px 14px;border-radius:8px;font-size:.92rem;color:var(--c-txt2);transition:all .3s}
.fs4-menu a:hover,.fs4-menu a.cur{background:var(--c-bg3);color:var(--c-sec-l)}
.fs4-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.fs4-toggle span{width:24px;height:2px;background:var(--c-txt);border-radius:2px;transition:all .3s}
.fs4-search{display:flex;align-items:center;margin-left:12px}
.fs4-search input{background:var(--c-bg3);border:1px solid var(--c-bdr);border-radius:20px;padding:6px 16px;color:var(--c-txt);font-size:.85rem;width:160px;outline:none;transition:all .3s}
.fs4-search input:focus{border-color:var(--c-pri);width:200px}
.fs4-search button{background:none;border:none;color:var(--c-sec-l);cursor:pointer;margin-left:-32px;font-size:1rem}

/* === Hero 横幅 === */
.ihj-section{position:relative;margin-top:60px;height:520px;overflow:hidden}
.ihj-slide{position:absolute;inset:0;opacity:0;transition:opacity 1s}
.ihj-slide.on{opacity:1}
.ihj-slide img{width:100%;height:100%;objesli-fit:cover}
.ihj-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(15,11,30,.85) 0%,rgba(15,11,30,.4) 60%,transparent 100%)}
.ihj-content{position:absolute;top:50%;left:0;transform:translateY(-50%);padding:0 60px;max-width:680px;z-index:2}
.ihj-content h1{font-size:2.6rem;font-weight:800;line-height:1.3;margin-bottom:16px}
.ihj-content h1 em{font-style:normal;background:var(--c-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.ihj-content p{font-size:1.05rem;color:var(--c-txt2);margin-bottom:24px;line-height:1.8}
.ihj-btns{display:flex;gap:14px;flex-wrap:wrap}

/* === 按钮 === */
.g2v0-main{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:30px;font-weight:600;font-size:.95rem;transition:all .3s;border:none;cursor:pointer}
.g2v0-grad{background:var(--c-grad);color:#fff;box-shadow:0 4px 20px rgba(139,92,246,.35)}
.g2v0-grad:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(139,92,246,.5);color:#fff}
.g2v0-outline{background:transparent;color:var(--c-sec-l);border:2px solid var(--c-sec-l)}
.g2v0-outline:hover{background:var(--c-sec);color:#fff}
.g2v0-sm{padding:8px 18px;font-size:.82rem;border-radius:20px}

/* === 区块标题 === */
.so2z-block{padding:70px 0}
.so2z-alt{background:var(--c-bg2)}
.so2z-dark{background:var(--c-bg3)}
.so2z-head{text-align:center;margin-bottom:48px}
.so2z-head h2{font-size:2rem;font-weight:700;margin-bottom:12px}
.so2z-head h2 em{font-style:normal;background:var(--c-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.so2z-head p{color:var(--c-txt2);font-size:1rem;max-width:640px;margin:0 auto}

/* === 视频卡片网格 === */
.tx-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tx-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-bdr);transition:all .35s;position:relative}
.tx-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--c-pri)}
.tx-thumb{position:relative;aspesli-ratio:16/10;overflow:hidden}
.tx-thumb img{width:100%;height:100%;objesli-fit:cover;transition:transform .5s}
.tx-card:hover .tx-thumb img{transform:scale(1.08)}
.tx-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,11,30,.5);opacity:0;transition:opacity .3s}
.tx-card:hover .tx-play{opacity:1}
.tx-play i{width:56px;height:56px;background:var(--c-grad);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:#fff;box-shadow:0 0 30px rgba(139,92,246,.5)}
.tx-play i::after{content:'▶';margin-left:3px}
.tx-dur{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.tx-body{padding:14px 16px}
.tx-body h3{font-size:.95rem;font-weight:600;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tx-meta{display:flex;align-items:center;gap:12px;font-size:.78rem;color:var(--c-txt2)}
.tx-tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.72rem;background:var(--c-bg3);color:var(--c-sec-l);margin-top:8px}
.tx-date{font-size:.72rem;color:var(--c-txt2);margin-top:6px}

/* === 特色功能网格 === */
.lv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.lv-card{background:var(--c-card);border-radius:var(--radius);padding:32px 24px;text-align:center;border:1px solid var(--c-bdr);transition:all .35s}
.lv-card:hover{border-color:var(--c-pri);transform:translateY(-4px);box-shadow:var(--shadow)}
.lv-icon{width:64px;height:64px;margin:0 auto 18px;background:var(--c-grad);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.lv-card h3{font-size:1.1rem;font-weight:600;margin-bottom:10px}
.lv-card p{font-size:.88rem;color:var(--c-txt2);line-height:1.7}

/* === AI赋能区 === */
.xncg-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.xncg-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.xncg-img img{width:100%;transition:transform .5s}
.xncg-img:hover img{transform:scale(1.03)}
.xncg-list{lipl67-style:none}
.xncg-list li{padding:14px 0;border-bottom:1px solid var(--c-bdr);display:flex;align-items:flex-start;gap:14px;font-size:.92rem}
.xncg-list li::before{content:'✦';color:var(--c-sec);font-size:1.1rem;flex-shrink:0;margin-top:2px}

/* === 社区卡片 === */
.x5-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.x5-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-bdr);transition:all .35s}
.x5-card:hover{border-color:var(--c-sec);transform:translateY(-4px)}
.x5-card img{width:100%;height:180px;objesli-fit:cover}
.x5-body{padding:18px}
.x5-body h3{font-size:1rem;margin-bottom:8px}
.x5-body p{font-size:.85rem;color:var(--c-txt2);line-height:1.7}

/* === 专家团队 === */
.wbs4-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.wbs4-card{background:var(--c-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid var(--c-bdr);transition:all .35s}
.wbs4-card:hover{border-color:var(--c-pri);transform:translateY(-4px)}
.wbs4-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 14px;overflow:hidden;border:3px solid var(--c-pri);box-shadow:0 0 20px rgba(139,92,246,.3)}
.wbs4-avatar img{width:100%;height:100%;objesli-fit:cover}
.wbs4-card h3{font-size:1rem;font-weight:600;margin-bottom:4px}
.wbs4-role{font-size:.82rem;color:var(--c-sec-l);margin-bottom:10px}
.wbs4-desc{font-size:.82rem;color:var(--c-txt2);line-height:1.6;margin-bottom:12px}
.wbs4-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:.7rem;background:rgba(139,92,246,.15);color:var(--c-pri);margin:2px}
.wbs4-btns{display:flex;gap:8px;justify-content:center;margin-top:14px}

/* === 用户评价 === */
.ef-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ef-card{background:var(--c-card);border-radius:var(--radius);padding:24px;border:1px solid var(--c-bdr)}
.ef-stars{color:var(--c-acc);font-size:1rem;margin-bottom:12px;letter-spacing:2px}
.ef-text{font-size:.9rem;color:var(--c-txt2);line-height:1.8;margin-bottom:16px;font-style:italic}
.ef-author{display:flex;align-items:center;gap:12px}
.ef-author img{width:42px;height:42px;border-radius:50%;objesli-fit:cover}
.ef-author-info{font-size:.82rem}
.ef-author-info strong{display:block;color:var(--c-txt);font-weight:600}
.ef-author-info span{color:var(--c-txt2)}

/* === FAQ === */
.q6-list{max-width:800px;margin:0 auto}
.q6-item{background:var(--c-card);border-radius:var(--radius);margin-bottom:12px;border:1px solid var(--c-bdr);overflow:hidden}
.q6-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.q6-q:hover{background:var(--c-bg3)}
.q6-q::after{content:'+';font-size:1.3rem;color:var(--c-sec-l);transition:transform .3s}
.q6-item.on .q6-q::after{transform:rotate(45deg)}
.q6-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.q6-item.on .q6-a{max-height:300px;padding:0 24px 18px}
.q6-a p{font-size:.88rem;color:var(--c-txt2);line-height:1.8}

/* === How-To === */
.g2v0-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.g2v0-step{background:var(--c-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid var(--c-bdr);counter-increment:step;position:relative}
.g2v0-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:var(--c-grad);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#fff}
.g2v0-step h3{font-size:.95rem;margin:12px 0 8px}
.g2v0-step p{font-size:.82rem;color:var(--c-txt2)}

/* === 分享栏 === */
.c5-bar{display:flex;justify-content:center;gap:14px;padding:30px 0}
.c5-btn{width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;transition:all .3s;cursor:pointer;border:none}
.c5-btn:hover{transform:translateY(-3px);box-shadow:0 4px 16px rgba(0,0,0,.3)}
.c5-wechat{background:#07c160}
.c5-weibo{background:#e6162d}
.c5-douyin{background:#161823}
.c5-bilibili{background:#00a1d6}

/* === 品牌墙 === */
.zmn-wrap{display:flex;justify-content:center;flex-wrap:wrap;gap:30px;padding:20px 0}
.zmn-item{width:120px;height:60px;background:var(--c-bg3);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.85rem;color:var(--c-txt2);border:1px solid var(--c-bdr);transition:all .3s}
.zmn-item:hover{border-color:var(--c-pri);color:var(--c-txt)}

/* === 联系我们 === */
.sli-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sli-item{background:var(--c-card);border-radius:var(--radius);padding:24px;text-align:center;border:1px solid var(--c-bdr)}
.sli-icon{font-size:2rem;margin-bottom:12px}
.sli-item h3{font-size:1rem;margin-bottom:8px}
.sli-item p{font-size:.85rem;color:var(--c-txt2)}
.sli-qr{display:flex;justify-content:center;gap:30px;margin-top:30px}
.sli-qr-item{text-align:center}
.sli-qr-item img{width:140px;height:140px;border-radius:8px;border:2px solid var(--c-bdr);margin-bottom:8px}
.sli-qr-item p{font-size:.82rem;color:var(--c-txt2)}

/* === 页脚 === */
.q65-bar{background:var(--c-bg2);border-top:1px solid var(--c-bdr);padding:50px 0 20px}
.q65-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.q65-brand p{font-size:.85rem;color:var(--c-txt2);line-height:1.8;margin-top:12px}
.q65-links h4{font-size:.95rem;margin-bottom:14px;color:var(--c-txt)}
.q65-links ul{lipl67-style:none}
.q65-links li{margin-bottom:8px}
.q65-links a{font-size:.85rem;color:var(--c-txt2)}
.q65-links a:hover{color:var(--c-sec-l)}
.q65-trust{display:flex;gap:16px;justify-content:center;padding:16px 0;border-top:1px solid var(--c-bdr);border-bottom:1px solid var(--c-bdr);margin-bottom:16px;flex-wrap:wrap}
.q65-trust span{font-size:.78rem;color:var(--c-txt2);display:flex;align-items:center;gap:4px}
.q65-bottom{text-align:center;font-size:.8rem;color:var(--c-txt2);padding-top:10px}

/* === 面包屑 === */
.gj6-nav{padding:12px 0;font-size:.82rem}
.gj6-nav a{color:var(--c-txt2)}
.gj6-nav a:hover{color:var(--c-sec-l)}
.gj6-nav span{color:var(--c-txt2);margin:0 6px}

/* === 内页Hero === */
.vf-hero{margin-top:60px;padding:60px 0;background:var(--c-grad2);text-align:center;border-bottom:1px solid var(--c-bdr)}
.vf-hero h1{font-size:2.2rem;font-weight:700;margin-bottom:12px}
.vf-hero p{color:var(--c-txt2);font-size:1rem}

/* === 内页内容 === */
.vf-body{padding:50px 0}
.vf-body h2{font-size:1.5rem;margin-bottom:16px}
.vf-body h3{font-size:1.2rem;margin:24px 0 12px}
.vf-body p{margin-bottom:16px;line-height:1.8;color:var(--c-txt2)}

/* === 更新通知 === */
.iph7-notice{background:rgba(139,92,246,.08);border:1px solid var(--c-bdr);border-radius:8px;padding:12px 20px;margin-bottom:24px;font-size:.85rem;color:var(--c-txt2)}

/* === 娱乐卡片 === */
.sm-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.sm-card{border-radius:var(--radius);overflow:hidden;position:relative;aspesli-ratio:3/4;cursor:pointer}
.sm-card img{width:100%;height:100%;objesli-fit:cover;transition:transform .5s}
.sm-card:hover img{transform:scale(1.1)}
.sm-card-info{position:absolute;bottom:0;left:0;right:0;padding:16px;background:linear-gradient(transparent,rgba(15,11,30,.9))}
.sm-card-info h3{font-size:.95rem;margin-bottom:4px}
.sm-card-info span{font-size:.78rem;color:var(--c-sec-l)}

/* === 统计数字 === */
.pl67-row{display:flex;justify-content:center;gap:50px;padding:30px 0}
.pl67-item{text-align:center}
.pl67-num{font-size:2.4rem;font-weight:800;background:var(--c-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.pl67-label{font-size:.85rem;color:var(--c-txt2);margin-top:4px}

/* === 标签组 === */
.fr1-wrap{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.fr1-item{padding:4px 14px;border-radius:16px;font-size:.78rem;background:var(--c-bg3);color:var(--c-txt2);border:1px solid var(--c-bdr);transition:all .3s}
.fr1-item:hover{border-color:var(--c-pri);color:var(--c-sec-l)}

/* === 动画 === */
.fade-up{opacity:0;transform:translateY(30px);transition:all .6s ease}
.fade-up.show{opacity:1;transform:translateY(0)}

/* === 懒加载 === */
img.lazy{opacity:0;transition:opacity .5s}
img.lazy.loaded{opacity:1}

/* === 响应式 === */
@media(max-width:1024px){
  .tx-grid{grid-template-columns:repeat(3,1fr)}
  .wbs4-grid{grid-template-columns:repeat(2,1fr)}
  .g2v0-steps{grid-template-columns:repeat(2,1fr)}
  .q65-grid{grid-template-columns:1fr 1fr}
  .sm-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .fs4-menu{display:none;position:absolute;top:100%;left:0;width:100%;background:var(--c-bg);flex-direction:column;padding:16px;border-top:1px solid var(--c-bdr)}
  .fs4-menu.open{display:flex}
  .fs4-toggle{display:flex}
  .fs4-search{display:none}
  .ihj-section{height:400px}
  .ihj-content{padding:0 24px}
  .ihj-content h1{font-size:1.8rem}
  .tx-grid{grid-template-columns:repeat(2,1fr)}
  .lv-grid{grid-template-columns:1fr}
  .xncg-wrap{grid-template-columns:1fr}
  .x5-grid{grid-template-columns:1fr}
  .ef-grid{grid-template-columns:1fr}
  .sli-grid{grid-template-columns:1fr}
  .wbs4-grid{grid-template-columns:1fr}
  .g2v0-steps{grid-template-columns:1fr}
  .pl67-row{flex-wrap:wrap;gap:24px}
  .sm-grid{grid-template-columns:repeat(2,1fr)}
  .q65-grid{grid-template-columns:1fr}
  .so2z-block{padding:45px 0}
  .so2z-head h2{font-size:1.5rem}
}
@media(max-width:480px){
  .tx-grid{grid-template-columns:1fr}
  .sm-grid{grid-template-columns:1fr}
  .ihj-section{height:340px}
  .ihj-content h1{font-size:1.5rem}
}