/* ============================================
   海角社区 - 全站样式表
   品牌色系：#0A1628 深蓝底 / #1E90FF 主蓝 / #00BFFF 亮蓝 / #E8F4FD 浅蓝背景
   116868.cn
   ============================================ */

/* === 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;color:#222;background:#f7fafd;line-height:1.8}
a{color:#1E90FF;text-decoration:none;transition:color .3s}
a:hover{color:#00BFFF}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.4;color:#0A1628}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-alt{background:#E8F4FD}

/* === 顶部导航 === */
.site-header{background:#0A1628;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:64px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:40px;width:40px}
.nav-logo span{color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.nav-menu{display:flex;gap:6px}
.nav-menu a{color:#cdd9e5;font-size:14px;padding:8px 14px;border-radius:6px;transition:all .3s}
.nav-menu a:hover,.nav-menu a.active{color:#fff;background:rgba(30,144,255,.25)}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* === 搜索栏 === */
.search-bar{background:linear-gradient(135deg,#0d1f3c,#132d5e);padding:14px 0}
.search-wrap{max-width:680px;margin:0 auto;display:flex;gap:0;padding:0 20px}
.search-wrap input{flex:1;padding:10px 18px;border:2px solid #1E90FF;border-right:none;border-radius:25px 0 0 25px;font-size:15px;outline:none;background:#fff;color:#333}
.search-wrap input::placeholder{color:#999}
.search-wrap button{padding:10px 28px;background:linear-gradient(135deg,#1E90FF,#00BFFF);color:#fff;border:none;border-radius:0 25px 25px 0;font-size:15px;cursor:pointer;font-weight:600;transition:opacity .3s}
.search-wrap button:hover{opacity:.85}

/* === Banner === */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#0A1628}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.55}
.hero-banner .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,22,40,.7) 0%,rgba(10,22,40,.4) 50%,rgba(10,22,40,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:40px 20px;max-width:800px}
.hero-content h1{font-size:42px;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero-content h1 em{font-style:normal;color:#00BFFF}
.hero-content p{font-size:18px;color:#cdd9e5;margin-bottom:24px;line-height:1.9}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:18px}
.hero-content .hero-tags span{background:rgba(30,144,255,.2);border:1px solid rgba(30,144,255,.4);padding:6px 16px;border-radius:20px;font-size:13px;color:#7ec8f8}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;background:#0A1628;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(1.06)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(10,22,40,.45)}
.video-card:hover .video-play-btn{opacity:1}
.video-play-btn span{width:56px;height:56px;background:rgba(30,144,255,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(30,144,255,.5)}
.video-play-btn span::after{content:"";display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-info{padding:16px}
.video-info h3{font-size:16px;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;font-size:12px;color:#888}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;background:#E8F4FD;color:#1E90FF;padding:2px 10px;border-radius:10px;font-size:12px;margin-top:8px}

/* === 栏目标题 === */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#0A1628;margin-bottom:10px}
.section-title h2 em{font-style:normal;color:#1E90FF}
.section-title p{color:#666;font-size:16px;max-width:600px;margin:0 auto}
.section-title .title-line{width:60px;height:3px;background:linear-gradient(90deg,#1E90FF,#00BFFF);margin:12px auto 0;border-radius:2px}

/* === 特色模块 === */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;padding:32px 24px;border-radius:12px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;border-top:3px solid transparent}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(0,0,0,.12);border-top-color:#1E90FF}
.feature-icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,#1E90FF,#00BFFF);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card p{font-size:14px;color:#666;line-height:1.7}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .expert-img{height:200px;overflow:hidden}
.expert-card .expert-img img{width:100%;height:100%;object-fit:cover}
.expert-card .expert-info{padding:20px}
.expert-card .expert-info h3{font-size:18px;margin-bottom:4px}
.expert-card .expert-info .expert-title{color:#1E90FF;font-size:14px;margin-bottom:10px}
.expert-card .expert-info p{font-size:13px;color:#666;line-height:1.7;margin-bottom:12px}
.expert-btns{display:flex;gap:10px}
.expert-btns a{flex:1;text-align:center;padding:8px;border-radius:6px;font-size:13px;font-weight:600;transition:all .3s}
.expert-btns .btn-primary{background:#1E90FF;color:#fff}
.expert-btns .btn-primary:hover{background:#0070e0}
.expert-btns .btn-outline{border:1px solid #1E90FF;color:#1E90FF}
.expert-btns .btn-outline:hover{background:#1E90FF;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:14px;box-shadow:0 2px 10px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:15px;color:#0A1628;transition:background .3s}
.faq-question:hover{background:#f0f7ff}
.faq-question::after{content:"+";font-size:22px;color:#1E90FF;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;font-size:14px;color:#555;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;padding:24px;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.06);position:relative}
.review-card::before{content:"\201C";position:absolute;top:12px;left:18px;font-size:48px;color:#E8F4FD;font-family:Georgia,serif;line-height:1}
.review-stars{color:#ffc107;font-size:14px;margin-bottom:10px;letter-spacing:2px}
.review-text{font-size:14px;color:#444;line-height:1.8;margin-bottom:14px;padding-top:8px}
.review-author{display:flex;align-items:center;gap:10px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#1E90FF,#00BFFF);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:700}
.review-author-info .name{font-size:14px;font-weight:600;color:#0A1628}
.review-author-info .date{font-size:12px;color:#999}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:20px 30px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.06);font-size:16px;font-weight:700;color:#555;transition:all .3s;border:1px solid #eee}
.partner-wall .partner-item:hover{border-color:#1E90FF;color:#1E90FF;transform:scale(1.05)}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:#fff;padding:28px;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.06);text-align:center}
.contact-card h3{font-size:18px;margin-bottom:14px;color:#0A1628}
.contact-card p{font-size:14px;color:#555;line-height:1.8;margin-bottom:6px}
.contact-card .contact-highlight{color:#1E90FF;font-weight:600;font-size:16px}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;font-size:14px;font-weight:600;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}

/* === 页脚 === */
.site-footer{background:#0A1628;color:#8899aa;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#1E90FF}
.footer-col p,.footer-col a{font-size:13px;color:#8899aa;line-height:2;display:block}
.footer-col a:hover{color:#00BFFF}
.footer-qr{display:flex;gap:20px;margin-top:10px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:120px;height:120px;border-radius:8px;border:2px solid rgba(30,144,255,.3)}
.footer-qr .qr-item span{display:block;font-size:12px;margin-top:6px;color:#8899aa}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px}
.footer-bottom a{color:#1E90FF}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:13px;color:#888}
.breadcrumb a{color:#1E90FF}
.breadcrumb span{margin:0 6px;color:#ccc}

/* === 内页 === */
.page-hero{background:linear-gradient(135deg,#0A1628,#132d5e);padding:60px 0;text-align:center;color:#fff}
.page-hero h1{font-size:36px;color:#fff;margin-bottom:10px}
.page-hero p{color:#8899aa;font-size:16px}
.page-content{padding:40px 0}
.page-content h2{font-size:26px;margin:30px 0 16px;color:#0A1628}
.page-content h3{font-size:20px;margin:24px 0 12px;color:#0A1628}
.page-content p{font-size:15px;color:#444;line-height:2;margin-bottom:16px}
.page-content .content-img{border-radius:12px;margin:20px 0;box-shadow:0 4px 20px rgba(0,0,0,.1)}

/* === 按钮 === */
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all .3s;border:none}
.btn-blue{background:linear-gradient(135deg,#1E90FF,#00BFFF);color:#fff;box-shadow:0 4px 16px rgba(30,144,255,.3)}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(30,144,255,.4);color:#fff}
.btn-ghost{border:2px solid #1E90FF;color:#1E90FF;background:transparent}
.btn-ghost:hover{background:#1E90FF;color:#fff}

/* === 响应式 === */
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:64px;left:0;right:0;background:#0A1628;flex-direction:column;padding:20px;gap:4px;box-shadow:0 8px 20px rgba(0,0,0,.3)}
  .nav-menu.show{display:flex}
  .nav-toggle{display:block}
  .hero-content h1{font-size:28px}
  .hero-content p{font-size:15px}
  .hero-banner{min-height:400px}
  .section{padding:40px 0}
  .section-title h2{font-size:24px}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .feature-grid{grid-template-columns:1fr 1fr;gap:16px}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .page-hero h1{font-size:26px}
  .search-wrap{padding:0 16px}
}
@media(max-width:480px){
  .feature-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .video-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}

/* === 懒加载 === */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

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

/* === How-To指南 === */
.howto-steps{max-width:700px;margin:0 auto}
.howto-step{display:flex;gap:20px;margin-bottom:28px;align-items:flex-start}
.howto-step .step-num{width:48px;height:48px;min-width:48px;background:linear-gradient(135deg,#1E90FF,#00BFFF);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:700}
.howto-step .step-content h4{font-size:16px;margin-bottom:6px;color:#0A1628}
.howto-step .step-content p{font-size:14px;color:#666}

/* === 数据统计 === */
.stats-bar{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.stat-item{text-align:center}
.stat-item .stat-num{font-size:36px;font-weight:800;color:#1E90FF;display:block}
.stat-item .stat-label{font-size:14px;color:#666;margin-top:4px}