/* ============================================
   小欣奈 - 原创样式表
   品牌色系：活力橙 #FF6B35 | 深夜蓝 #1A1A2E | 电竞红 #E94560
   ============================================ */

/* === 基础重置 === */
*,*::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:#0F0F23;color:#EAEAEA;line-height:1.7;overflow-x:hidden}
a{color:#FF6B35;text-decoration:none;transition:color .3s}
a:hover{color:#E94560}
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:#fff}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:40px;font-size:2rem;position:relative;padding-bottom:15px}
.section-title::after{content:"";display:block;width:80px;height:3px;background:linear-gradient(90deg,#FF6B35,#E94560);margin:12px auto 0;border-radius:2px}
.section-subtitle{text-align:center;color:#aaa;font-size:1rem;margin-top:-30px;margin-bottom:40px}

/* === 导航栏 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(15,15,35,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,107,53,.15);transition:all .3s}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:40px;width:auto}
.site-logo span{font-size:1.3rem;font-weight:700;background:linear-gradient(135deg,#FF6B35,#E94560);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 16px;border-radius:6px;font-size:.95rem;color:#ccc;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,107,53,.15)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:#FF6B35;border-radius:2px;transition:all .3s}

/* === 搜索框 === */
.search-bar{background:rgba(22,33,62,.6);padding:16px 0;border-bottom:1px solid rgba(255,107,53,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-wrap{position:relative;width:100%;max-width:600px}
.search-wrap input{width:100%;padding:12px 50px 12px 20px;border:2px solid rgba(255,107,53,.3);border-radius:30px;background:rgba(15,15,35,.8);color:#eee;font-size:1rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:#FF6B35}
.search-wrap input::placeholder{color:#666}
.search-wrap button{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:linear-gradient(135deg,#FF6B35,#E94560);border:none;color:#fff;width:38px;height:38px;border-radius:50%;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.search-wrap button:hover{transform:translateY(-50%) scale(1.1)}

/* === Banner === */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:68px}
.hero-banner .bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.5)}
.hero-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,15,35,.3) 0%,rgba(15,15,35,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:40px 20px;max-width:800px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;background:linear-gradient(135deg,#FF6B35,#E94560);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:1.15rem;color:#ccc;margin-bottom:24px;line-height:1.8}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px}
.hero-content .hero-tags span{padding:6px 16px;border-radius:20px;background:rgba(255,107,53,.15);color:#FF6B35;font-size:.85rem;border:1px solid rgba(255,107,53,.3)}
.btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#FF6B35,#E94560);color:#fff;border-radius:30px;font-size:1rem;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(233,69,96,.4);color:#fff}

/* === 通用区块 === */
section{padding:60px 0}
section:nth-child(even){background:rgba(22,33,62,.3)}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#16213E;border-radius:12px;overflow:hidden;transition:all .3s;border:1px solid rgba(255,107,53,.1);position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(233,69,96,.2);border-color:rgba(255,107,53,.3)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(255,107,53,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;z-index:3}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:"";display:block;width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem;z-index:3}
.video-card .card-body{padding:16px}
.video-card .card-body h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.video-card .meta{display:flex;align-items:center;gap:12px;color:#888;font-size:.85rem}
.video-card .meta .views::before{content:"▶ "}
.video-card .meta .likes::before{content:"♥ "}

/* === 模块卡片 === */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.module-card{background:linear-gradient(145deg,#16213E,#1A1A2E);border-radius:12px;padding:28px;border:1px solid rgba(255,107,53,.1);transition:all .3s;text-align:center}
.module-card:hover{border-color:#FF6B35;transform:translateY(-4px);box-shadow:0 8px 20px rgba(255,107,53,.15)}
.module-card .icon{font-size:2.5rem;margin-bottom:16px}
.module-card h3{font-size:1.15rem;margin-bottom:10px;color:#FF6B35}
.module-card p{color:#aaa;font-size:.9rem;line-height:1.6}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#16213E;border-radius:12px;overflow:hidden;text-align:center;border:1px solid rgba(255,107,53,.1);transition:all .3s}
.expert-card:hover{border-color:#E94560;transform:translateY(-4px)}
.expert-card .avatar{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;overflow:hidden;border:3px solid #FF6B35}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:#FF6B35;font-size:.9rem;margin-bottom:12px}
.expert-card p{color:#aaa;font-size:.85rem;padding:0 20px;margin-bottom:16px;line-height:1.6}
.expert-card .actions{padding:0 20px 20px;display:flex;gap:10px;justify-content:center}
.btn-sm{padding:8px 18px;border-radius:20px;font-size:.85rem;border:1px solid #FF6B35;color:#FF6B35;transition:all .3s;display:inline-block}
.btn-sm:hover{background:#FF6B35;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#16213E;border-radius:10px;margin-bottom:12px;border:1px solid rgba(255,107,53,.1);overflow:hidden}
.faq-item .faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;transition:background .3s}
.faq-item .faq-q:hover{background:rgba(255,107,53,.08)}
.faq-item .faq-q::after{content:"+";font-size:1.4rem;color:#FF6B35;transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#aaa;line-height:1.8}
.faq-item.active .faq-a{padding:0 24px 18px;max-height:500px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#16213E;border-radius:12px;padding:24px;border:1px solid rgba(255,107,53,.1)}
.review-card .stars{color:#FF6B35;font-size:1.1rem;margin-bottom:10px;letter-spacing:3px}
.review-card .review-text{color:#ccc;font-size:.95rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .r-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#FF6B35,#E94560);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .r-info .r-name{font-weight:600;font-size:.9rem}
.review-card .reviewer .r-info .r-date{color:#888;font-size:.8rem}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:#16213E;border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(255,107,53,.1)}
.contact-card .c-icon{font-size:2rem;margin-bottom:12px}
.contact-card h4{margin-bottom:8px;color:#FF6B35}
.contact-card p{color:#aaa;font-size:.9rem}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-bar a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;background:rgba(255,107,53,.1);color:#FF6B35;font-size:.9rem;border:1px solid rgba(255,107,53,.2);transition:all .3s}
.share-bar a:hover{background:#FF6B35;color:#fff}

/* === 页脚 === */
.site-footer{background:#0a0a1a;padding:40px 0 20px;border-top:1px solid rgba(255,107,53,.15)}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#FF6B35;margin-bottom:16px;font-size:1rem}
.footer-col p,.footer-col a{color:#888;font-size:.9rem;line-height:1.8;display:block}
.footer-col a:hover{color:#FF6B35}
.footer-col .qr-img{width:120px;height:120px;border-radius:8px;overflow:hidden;margin-top:8px}
.footer-col .qr-img img{width:100%;height:100%}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.05);color:#666;font-size:.85rem}
.footer-bottom .update-time{margin-top:6px;color:#555}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.9rem;color:#888}
.breadcrumb a{color:#FF6B35}
.breadcrumb span{margin:0 8px;color:#555}

/* === 内页通用 === */
.page-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(180deg,rgba(22,33,62,.8),rgba(15,15,35,1))}
.page-hero h1{font-size:2.2rem;margin-bottom:12px}
.page-hero p{color:#aaa;font-size:1rem}
.page-content{padding:40px 0 60px}
.page-content p{color:#ccc;line-height:1.8;margin-bottom:16px}
.page-content h2{color:#FF6B35;margin:30px 0 16px;font-size:1.6rem}
.page-content h3{color:#fff;margin:24px 0 12px;font-size:1.3rem}

/* === 侧边栏推荐 === */
.content-layout{display:grid;grid-template-columns:1fr 320px;gap:30px}
.sidebar .widget{background:#16213E;border-radius:12px;padding:20px;margin-bottom:20px;border:1px solid rgba(255,107,53,.1)}
.sidebar .widget h4{color:#FF6B35;margin-bottom:14px;font-size:1rem;padding-bottom:10px;border-bottom:1px solid rgba(255,107,53,.1)}
.sidebar .widget .side-link{display:block;padding:8px 0;color:#ccc;font-size:.9rem;border-bottom:1px solid rgba(255,255,255,.03);transition:color .3s}
.sidebar .widget .side-link:hover{color:#FF6B35}

/* === 响应式 === */
@media(max-width:768px){
  .main-nav{position:fixed;top:68px;left:0;width:100%;background:rgba(15,15,35,.98);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid rgba(255,107,53,.15)}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:12px 16px;width:100%}
  .nav-toggle{display:flex}
  .hero-content h1{font-size:1.8rem}
  .hero-banner{min-height:400px}
  .section-title{font-size:1.5rem}
  .content-layout{grid-template-columns:1fr}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.5rem}
  .video-grid{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* === 动画 === */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{opacity:0;transform:translateY(30px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === 懒加载占位 === */
.lazy-img{background:#1a1a3e;min-height:180px}