/* ===== 色虎视频 - 全站样式表 ===== */
/* 原创配色方案：虎红 #E63946 | 深邃蓝 #1D3557 | 暖橙 #F4A261 | 暗夜黑 #0A0E17 */

/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:#0A0E17;color:#F1FAEE;line-height:1.7;overflow-x:hidden}
a{color:#F4A261;text-decoration:none;transition:color .3s}
a:hover{color:#E63946}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#F1FAEE}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header & Navigation ===== */
.site-header{background:rgba(10,14,23,.95);backdrop-filter:blur(10px);position:fixed;top:0;left:0;width:100%;z-index:1000;border-bottom:1px solid rgba(230,57,70,.2);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:1.4rem;font-weight:800;color:#E63946;letter-spacing:1px}
.logo-text span{color:#F4A261}

.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:12px 18px;font-size:.95rem;color:#A8B2C1;font-weight:500;position:relative;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#E63946}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:#E63946;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}

.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-toggle span{width:24px;height:2px;background:#F1FAEE;transition:all .3s}

/* ===== Search Bar ===== */
.search-bar{background:rgba(20,27,45,.8);padding:12px 0;border-bottom:1px solid rgba(29,53,87,.5);margin-top:65px}
.search-wrap{max-width:600px;margin:0 auto;display:flex;gap:0;padding:0 20px}
.search-wrap input{flex:1;padding:10px 18px;background:rgba(241,250,238,.08);border:1px solid rgba(168,178,193,.2);border-right:none;border-radius:6px 0 0 6px;color:#F1FAEE;font-size:.9rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:#E63946}
.search-wrap input::placeholder{color:#A8B2C1}
.search-wrap button{padding:10px 24px;background:#E63946;color:#fff;border:none;border-radius:0 6px 6px 0;cursor:pointer;font-size:.9rem;font-weight:600;transition:background .3s}
.search-wrap button:hover{background:#c62d3a}

/* ===== Hero Section ===== */
.hero{position:relative;height:520px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.6)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,23,.3) 0%,rgba(10,14,23,.85) 100%)}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:0 20px}
.hero h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero h1 .brand{color:#E63946}
.hero p{font-size:1.15rem;color:#A8B2C1;max-width:650px;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-tags span{padding:6px 16px;background:rgba(230,57,70,.15);border:1px solid rgba(230,57,70,.3);border-radius:20px;font-size:.85rem;color:#F4A261}

/* ===== Section Common ===== */
.section{padding:60px 0}
.section-header{text-align:center;margin-bottom:40px}
.section-header h2{font-size:1.8rem;margin-bottom:10px}
.section-header h2 .hl{color:#E63946}
.section-header p{color:#A8B2C1;font-size:1rem;max-width:600px;margin:0 auto}
.section-alt{background:rgba(20,27,45,.5)}

/* ===== Video Cards Grid ===== */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#141B2D;border-radius:10px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(230,57,70,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb video{transform:scale(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:52px;height:52px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;pointer-events:none}
.play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .play-btn{opacity:1}
.video-info{padding:14px}
.video-info h3{font-size:.95rem;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-meta{display:flex;gap:12px;font-size:.8rem;color:#A8B2C1}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-date{display:inline-block;font-size:.75rem;color:#A8B2C1;margin-left:8px}
.video-tag{display:inline-block;padding:2px 8px;background:rgba(244,162,97,.12);color:#F4A261;border-radius:4px;font-size:.75rem;margin-top:6px}

/* ===== Feature Modules ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#141B2D;border-radius:12px;padding:30px 24px;text-align:center;border:1px solid rgba(29,53,87,.4);transition:all .3s}
.feature-card:hover{border-color:#E63946;transform:translateY(-4px)}
.feature-icon{width:60px;height:60px;margin:0 auto 16px;background:linear-gradient(135deg,#E63946,#F4A261);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{font-size:.88rem;color:#A8B2C1;line-height:1.6}

/* ===== Expert Section ===== */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.expert-card{background:#141B2D;border-radius:12px;padding:28px;text-align:center;border:1px solid rgba(29,53,87,.4);transition:all .3s}
.expert-card:hover{border-color:#F4A261}
.expert-avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 14px;overflow:hidden;border:3px solid #E63946}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1rem;margin-bottom:4px}
.expert-card .title{color:#F4A261;font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#A8B2C1;margin-bottom:14px;line-height:1.5}
.expert-links{display:flex;gap:10px;justify-content:center}
.btn-sm{padding:6px 16px;border-radius:6px;font-size:.8rem;font-weight:600;transition:all .3s;display:inline-block}
.btn-primary{background:#E63946;color:#fff}
.btn-primary:hover{background:#c62d3a;color:#fff}
.btn-outline{border:1px solid #F4A261;color:#F4A261}
.btn-outline:hover{background:#F4A261;color:#0A0E17}

/* ===== Partner Logos ===== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-item{background:rgba(241,250,238,.06);border:1px solid rgba(168,178,193,.15);border-radius:10px;padding:18px 28px;font-size:.95rem;font-weight:600;color:#A8B2C1;transition:all .3s}
.partner-item:hover{border-color:#E63946;color:#F1FAEE}

/* ===== Articles ===== */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.article-card{background:#141B2D;border-radius:12px;padding:24px;border:1px solid rgba(29,53,87,.4);transition:all .3s}
.article-card:hover{border-color:#E63946;transform:translateY(-4px)}
.article-card h3{font-size:1rem;margin-bottom:10px;color:#F1FAEE;line-height:1.5}
.article-card p{font-size:.9rem;color:#A8B2C1;line-height:1.7;margin-bottom:12px}
.article-meta{display:flex;gap:16px;font-size:.8rem;color:#7A8599;flex-wrap:wrap}
.article-meta time{color:#F4A261}

/* ===== FAQ Section ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#141B2D;border-radius:10px;margin-bottom:12px;border:1px solid rgba(29,53,87,.4);overflow:hidden}
.faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:color .3s}
.faq-q:hover{color:#E63946}
.faq-q::after{content:'+';font-size:1.3rem;color:#E63946;transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#A8B2C1;font-size:.9rem;line-height:1.7}
.faq-item.active .faq-a{padding:0 24px 18px;max-height:300px}

/* ===== Reviews ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:#141B2D;border-radius:12px;padding:24px;border:1px solid rgba(29,53,87,.4)}
.review-stars{color:#F4A261;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card p{font-size:.9rem;color:#A8B2C1;line-height:1.6;margin-bottom:12px;font-style:italic}
.review-author{font-size:.85rem;font-weight:600;color:#F1FAEE}
.review-date{font-size:.78rem;color:#A8B2C1}

/* ===== Contact Section ===== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;align-items:start}
.contact-info{background:#141B2D;border-radius:12px;padding:30px;border:1px solid rgba(29,53,87,.4)}
.contact-info h3{font-size:1.1rem;margin-bottom:16px;color:#E63946}
.contact-row{display:flex;gap:10px;margin-bottom:12px;font-size:.9rem;color:#A8B2C1;align-items:flex-start}
.contact-row strong{color:#F1FAEE;min-width:70px}
.qrcode-wrap{display:flex;gap:20px;margin-top:20px}
.qrcode-item{text-align:center}
.qrcode-item img{width:120px;height:120px;border-radius:8px;margin-bottom:6px}
.qrcode-item span{font-size:.8rem;color:#A8B2C1}

/* ===== How-To Guide ===== */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.howto-step{text-align:center;padding:24px 16px}
.step-num{width:44px;height:44px;background:linear-gradient(135deg,#E63946,#F4A261);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:800;font-size:1.1rem;color:#fff}
.howto-step h4{font-size:.95rem;margin-bottom:6px}
.howto-step p{font-size:.82rem;color:#A8B2C1}

/* ===== Share Buttons ===== */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{padding:8px 20px;border-radius:6px;font-size:.85rem;font-weight:600;color:#fff;transition:all .3s;cursor:pointer;border:none}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}

/* ===== Footer ===== */
.site-footer{background:#080C14;border-top:1px solid rgba(29,53,87,.4);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand .logo-text{font-size:1.2rem;margin-bottom:10px}
.footer-brand p{font-size:.85rem;color:#A8B2C1;line-height:1.6}
.footer-col h4{font-size:.95rem;margin-bottom:14px;color:#F4A261}
.footer-col a{display:block;font-size:.85rem;color:#A8B2C1;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#E63946}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(29,53,87,.3);font-size:.82rem;color:#A8B2C1}
.footer-bottom .update-time{margin-top:6px;font-size:.78rem}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#A8B2C1;margin-top:65px}
.breadcrumb a{color:#F4A261}
.breadcrumb span{margin:0 8px;color:#A8B2C1}

/* ===== Inner Page Content ===== */
.page-hero{background:#141B2D;padding:50px 0;margin-top:65px;text-align:center;border-bottom:1px solid rgba(29,53,87,.4)}
.page-hero h1{font-size:2rem;margin-bottom:10px}
.page-hero p{color:#A8B2C1;font-size:1rem}
.content-section{padding:40px 0}
.content-section h2{font-size:1.5rem;margin-bottom:16px;color:#E63946}
.content-section p{font-size:.95rem;color:#A8B2C1;line-height:1.8;margin-bottom:16px}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;background:#0A0E17;padding:10px 0}
  .main-nav.show{display:flex}
  .mobile-toggle{display:flex}
  .hero h1{font-size:1.8rem}
  .hero{height:400px}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .article-grid{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-header h2{font-size:1.4rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero h1{font-size:1.5rem}
  .hero{height:340px}
  .logo-text{font-size:1.1rem}
}

/* ===== Lazy Load ===== */
img[loading="lazy"]{transition:opacity .4s}

/* ===== Animations ===== */
.fade-in{opacity:0;transform:translateY(20px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}