/* ============================================
   四虎视频 - 原创样式表
   配色方案：珊瑚粉 #F87171 + 玫瑰金 #B76E79 + 暖杏 #FBBF7A + 深夜蓝 #1E1B2E
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2d2d3a;background:#fdf8f6;line-height:1.7}
a{color:#b76e79;text-decoration:none;transition:color .3s}
a:hover{color:#f87171}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* === 容器 === */
.tx-container{max-width:1240px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.tx-header{background:linear-gradient(135deg,#1e1b2e 0%,#2d2545 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(30,27,46,.3)}
.tx-nav{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:68px;max-width:1240px;margin:0 auto}
.tx-logo{display:flex;align-items:center;gap:10px}
.tx-logo img{height:42px;width:auto}
.tx-logo span{font-size:1.3rem;font-weight:700;color:#fff;letter-spacing:1px}
.tx-nav-links{display:flex;gap:6px;align-items:center}
.tx-nav-links a{color:#e8d5d8;font-size:.9rem;padding:8px 14px;border-radius:20px;transition:all .3s}
.tx-nav-links a:hover,.tx-nav-links a.active{background:rgba(248,113,113,.2);color:#f87171}
.tx-mobile-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === 搜索栏 === */
.tx-search-bar{background:linear-gradient(90deg,#2d2545,#3d2f5c);padding:12px 0}
.tx-search-wrap{max-width:600px;margin:0 auto;position:relative;padding:0 20px}
.tx-search-wrap input{width:100%;padding:10px 44px 10px 18px;border:2px solid rgba(248,113,113,.3);border-radius:25px;background:rgba(255,255,255,.08);color:#fff;font-size:.9rem;outline:none;transition:border-color .3s}
.tx-search-wrap input::placeholder{color:#a89db0}
.tx-search-wrap input:focus{border-color:#f87171;background:rgba(255,255,255,.12)}
.tx-search-wrap button{position:absolute;right:28px;top:50%;transform:translateY(-50%);background:none;border:none;color:#f87171;font-size:1.1rem;cursor:pointer}
.tx-search-suggest{position:absolute;top:100%;left:20px;right:20px;background:#2d2545;border-radius:0 0 12px 12px;display:none;z-index:99;box-shadow:0 8px 20px rgba(0,0,0,.3)}
.tx-search-suggest a{display:block;padding:10px 18px;color:#e8d5d8;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,.05)}
.tx-search-suggest a:hover{background:rgba(248,113,113,.1);color:#f87171}

/* === Banner === */
.tx-banner{position:relative;overflow:hidden;min-height:480px;display:flex;align-items:center}
.tx-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.tx-banner-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(30,27,46,.85) 0%,rgba(183,110,121,.4) 60%,rgba(248,113,113,.2) 100%)}
.tx-banner-content{position:relative;z-index:2;padding:60px 40px;max-width:680px}
.tx-banner-content h1{font-size:2.6rem;color:#fff;font-weight:800;line-height:1.3;margin-bottom:16px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.tx-banner-content p{color:#f0d9dc;font-size:1.05rem;line-height:1.8;margin-bottom:24px}
.tx-btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#f87171,#b76e79);color:#fff;border-radius:30px;font-weight:600;font-size:.95rem;transition:all .3s;box-shadow:0 4px 15px rgba(248,113,113,.4)}
.tx-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(248,113,113,.5);color:#fff}

/* === 面包屑 === */
.tx-breadcrumb{padding:14px 0;font-size:.82rem;color:#8a7f8e}
.tx-breadcrumb a{color:#b76e79}
.tx-breadcrumb span{margin:0 6px;color:#ccc}

/* === 栏目标题 === */
.tx-section{padding:50px 0}
.tx-section:nth-child(even){background:#fff}
.tx-section-title{text-align:center;margin-bottom:36px}
.tx-section-title h2{font-size:1.8rem;color:#1e1b2e;font-weight:700;position:relative;display:inline-block;padding-bottom:12px}
.tx-section-title h2::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#f87171,#fbbf7a);border-radius:2px}
.tx-section-title p{color:#7a7185;margin-top:10px;font-size:.92rem}

/* === 视频卡片网格 === */
.tx-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tx-video-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 20px rgba(30,27,46,.08);transition:all .4s cubic-bezier(.25,.8,.25,1);position:relative}
.tx-video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(183,110,121,.18)}
.tx-video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.tx-video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.tx-video-card:hover .tx-video-thumb img{transform:scale(1.06)}
.tx-video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(30,27,46,.4);opacity:0;transition:opacity .3s;cursor:pointer}
.tx-video-card:hover .tx-video-play{opacity:1}
.tx-video-play i{width:56px;height:56px;background:rgba(248,113,113,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0;transition:transform .3s}
.tx-video-play i::after{content:"";border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.tx-video-card:hover .tx-video-play i{transform:scale(1.1)}
.tx-video-dur{position:absolute;bottom:8px;right:8px;background:rgba(30,27,46,.8);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:4px}
.tx-video-info{padding:14px 16px}
.tx-video-info h3{font-size:.95rem;font-weight:600;color:#1e1b2e;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tx-video-meta{display:flex;gap:12px;font-size:.78rem;color:#9a8fa0;flex-wrap:wrap}
.tx-video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.tx-video-tags span{font-size:.72rem;padding:2px 10px;background:#fdf2f4;color:#b76e79;border-radius:12px}

/* === 专家展示 === */
.tx-expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tx-expert-card{background:#fff;border-radius:14px;padding:24px 16px;text-align:center;box-shadow:0 4px 16px rgba(30,27,46,.06);transition:all .3s}
.tx-expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(183,110,121,.15)}
.tx-expert-avatar{width:80px;height:80px;border-radius:50%;margin:0 auto 12px;background:linear-gradient(135deg,#f87171,#fbbf7a);display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff;font-weight:700}
.tx-expert-card h4{font-size:1rem;color:#1e1b2e;margin-bottom:4px}
.tx-expert-card .role{font-size:.8rem;color:#b76e79;margin-bottom:8px}
.tx-expert-card p{font-size:.82rem;color:#7a7185;line-height:1.6}
.tx-expert-links{margin-top:12px;display:flex;gap:8px;justify-content:center}
.tx-expert-links a{font-size:.78rem;padding:4px 14px;border:1px solid #f87171;color:#f87171;border-radius:16px;transition:all .3s}
.tx-expert-links a:hover{background:#f87171;color:#fff}

/* === FAQ === */
.tx-faq-list{max-width:800px;margin:0 auto}
.tx-faq-item{border-bottom:1px solid #f0e8ea;padding:0}
.tx-faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 0;cursor:pointer;font-weight:600;color:#1e1b2e;font-size:.95rem;transition:color .3s}
.tx-faq-question:hover{color:#f87171}
.tx-faq-question::after{content:"+";font-size:1.3rem;color:#b76e79;transition:transform .3s}
.tx-faq-item.open .tx-faq-question::after{transform:rotate(45deg)}
.tx-faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;color:#7a7185;font-size:.88rem;line-height:1.8}
.tx-faq-item.open .tx-faq-answer{max-height:300px;padding-bottom:18px}

/* === 用户评论 === */
.tx-review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tx-review-card{background:#fff;border-radius:14px;padding:24px;box-shadow:0 4px 16px rgba(30,27,46,.06);border-left:4px solid #f87171}
.tx-review-card .stars{color:#fbbf7a;font-size:.9rem;margin-bottom:8px;letter-spacing:2px}
.tx-review-card blockquote{font-size:.9rem;color:#4a4458;line-height:1.7;font-style:italic;margin-bottom:12px}
.tx-review-card .reviewer{font-size:.82rem;color:#b76e79;font-weight:600}

/* === 合作品牌 === */
.tx-partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.tx-partner-wall span{background:#fff;padding:14px 28px;border-radius:10px;font-size:.9rem;color:#4a4458;box-shadow:0 2px 10px rgba(30,27,46,.06);font-weight:500}

/* === How-To指南 === */
.tx-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.tx-howto-step{background:#fff;border-radius:14px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(30,27,46,.06);position:relative;counter-increment:step}
.tx-howto-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:linear-gradient(135deg,#f87171,#b76e79);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.tx-howto-step h4{margin-top:8px;color:#1e1b2e;font-size:.95rem;margin-bottom:8px}
.tx-howto-step p{font-size:.82rem;color:#7a7185;line-height:1.6}

/* === 联系我们 === */
.tx-contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.tx-contact-info{background:#fff;border-radius:14px;padding:30px;box-shadow:0 4px 16px rgba(30,27,46,.06)}
.tx-contact-info h3{font-size:1.2rem;color:#1e1b2e;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid #f0e8ea}
.tx-contact-item{display:flex;gap:12px;align-items:flex-start;margin-bottom:16px}
.tx-contact-item .icon{width:36px;height:36px;background:linear-gradient(135deg,#f87171,#fbbf7a);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem;flex-shrink:0}
.tx-contact-item .text{font-size:.88rem;color:#4a4458;line-height:1.6}
.tx-contact-item .text strong{color:#1e1b2e;display:block;margin-bottom:2px}

/* === 社交分享 === */
.tx-share-bar{display:flex;gap:10px;justify-content:center;padding:20px 0}
.tx-share-bar a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.82rem;color:#fff;transition:all .3s}
.tx-share-bar a:hover{transform:translateY(-2px);color:#fff}
.tx-share-wechat{background:#07c160}
.tx-share-weibo{background:#e6162d}
.tx-share-douyin{background:#161823}
.tx-share-bilibili{background:#00a1d6}

/* === 页脚 === */
.tx-footer{background:linear-gradient(135deg,#1e1b2e 0%,#2d2545 100%);color:#c4b8cc;padding:40px 0 0}
.tx-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.08)}
.tx-footer h4{color:#fff;font-size:1rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.tx-footer h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#f87171}
.tx-footer p,.tx-footer a{font-size:.85rem;color:#a89db0;line-height:1.8}
.tx-footer a:hover{color:#f87171}
.tx-footer-links a{display:block;margin-bottom:6px}
.tx-footer-qr{display:flex;gap:16px}
.tx-footer-qr img{width:100px;height:100px;border-radius:8px;border:2px solid rgba(255,255,255,.1)}
.tx-footer-qr .qr-label{font-size:.75rem;text-align:center;margin-top:4px;color:#8a7f8e}
.tx-footer-bottom{text-align:center;padding:20px 0;font-size:.8rem;color:#6b5f75}

/* === 回到顶部 === */
.tx-back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:linear-gradient(135deg,#f87171,#b76e79);color:#fff;border:none;border-radius:50%;font-size:1.2rem;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(248,113,113,.4);z-index:999;transition:all .3s}
.tx-back-top:hover{transform:translateY(-3px)}
.tx-back-top.show{display:flex}

/* === 视频弹窗 === */
.tx-video-overlay{position:fixed;inset:0;background:rgba(30,27,46,.9);z-index:2000;display:none;align-items:center;justify-content:center}
.tx-video-overlay.active{display:flex}
.tx-video-overlay .close-btn{position:absolute;top:20px;right:30px;color:#fff;font-size:2rem;cursor:pointer;background:none;border:none}
.tx-video-overlay .player-box{width:80%;max-width:900px;aspect-ratio:16/9;background:#000;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem}

/* === 干扰标签隐藏 === */
.d-none{display:none!important}

/* === 响应式 === */
@media(max-width:1024px){
  .tx-video-grid{grid-template-columns:repeat(2,1fr)}
  .tx-expert-grid{grid-template-columns:repeat(2,1fr)}
  .tx-howto-steps{grid-template-columns:repeat(2,1fr)}
  .tx-footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .tx-nav-links{position:fixed;top:68px;left:0;right:0;background:#1e1b2e;flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;box-shadow:0 8px 20px rgba(0,0,0,.3)}
  .tx-nav-links.open{transform:translateY(0)}
  .tx-mobile-btn{display:block}
  .tx-banner{min-height:360px}
  .tx-banner-content{padding:40px 20px}
  .tx-banner-content h1{font-size:1.8rem}
  .tx-video-grid{grid-template-columns:1fr}
  .tx-expert-grid{grid-template-columns:1fr}
  .tx-review-grid{grid-template-columns:1fr}
  .tx-contact-grid{grid-template-columns:1fr}
  .tx-howto-steps{grid-template-columns:1fr}
  .tx-footer-grid{grid-template-columns:1fr}
  .tx-section{padding:36px 0}
  .tx-section-title h2{font-size:1.4rem}
}
@media(max-width:480px){
  .tx-banner-content h1{font-size:1.5rem}
  .tx-nav{padding:0 16px}
}