/* ============================================
   海角 - 原创样式表
   配色方案：深空蓝 #0a0e27 / 电光蓝 #00d4ff / 霓虹粉 #ff2d78 / 星辉紫 #7b2ff7
   ============================================ */

/* === 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:#0a0e27;color:#e0e6f0;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:#00d4ff;transition:color .3s}
a:hover{color:#ff2d78}
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-wrap{padding:60px 0}

/* === 顶部导航 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,14,39,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,212,255,.15);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:42px;width:auto}
.logo-text{font-size:1.3rem;font-weight:800;background:linear-gradient(135deg,#00d4ff,#ff2d78);-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 14px;font-size:.9rem;color:#c0c8d8;border-radius:6px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(0,212,255,.12)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}

/* === 搜索框 === */
.search-bar{background:rgba(0,212,255,.06);border-bottom:1px solid rgba(0,212,255,.1);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:560px;width:100%;position:relative}
.search-form input{flex:1;padding:10px 20px;background:rgba(255,255,255,.06);border:1px solid rgba(0,212,255,.25);border-radius:25px 0 0 25px;color:#fff;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#00d4ff}
.search-form input::placeholder{color:#7a8599}
.search-form button{padding:10px 24px;background:linear-gradient(135deg,#00d4ff,#7b2ff7);border:none;color:#fff;font-size:.95rem;border-radius:0 25px 25px 0;cursor:pointer;transition:opacity .3s}
.search-form button:hover{opacity:.85}

/* === 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(.45)}
.hero-content{position:relative;z-index:2;text-align:center;padding:40px 20px;max-width:800px}
.hero-content h1{font-size:2.6rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,212,255,.4)}
.hero-content h1 .brand{color:#00d4ff}
.hero-content p{font-size:1.15rem;color:#c0c8d8;margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#00d4ff,#7b2ff7);color:#fff;border-radius:30px;font-weight:600;font-size:1rem;transition:transform .3s,box-shadow .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,212,255,.35);color:#fff}
.btn-outline{display:inline-block;padding:12px 32px;border:2px solid #00d4ff;color:#00d4ff;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s;background:transparent;cursor:pointer}
.btn-outline:hover{background:#00d4ff;color:#0a0e27}

/* === 通用标题 === */
.section-title{text-align:center;margin-bottom:45px}
.section-title h2{font-size:2rem;margin-bottom:10px}
.section-title h2 .hl{color:#00d4ff}
.section-title p{color:#8a94a8;font-size:1rem}
.section-title .line{width:60px;height:3px;background:linear-gradient(90deg,#00d4ff,#ff2d78);margin:12px auto 0;border-radius:3px}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:rgba(255,255,255,.04);border-radius:12px;overflow:hidden;border:1px solid rgba(0,212,255,.1);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(0,212,255,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;cursor:pointer}
.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s;z-index:1}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(0,212,255,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;pointer-events:none;z-index:5}
.play-btn::after{content:"";width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card:hover .play-btn{opacity:1}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;font-size:.82rem;color:#7a8599}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 10px;font-size:.75rem;background:rgba(0,212,255,.12);color:#00d4ff;border-radius:12px;margin-top:8px}

/* === 模块卡片 === */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.module-card{background:rgba(255,255,255,.03);border:1px solid rgba(123,47,247,.15);border-radius:14px;padding:28px 24px;text-align:center;transition:all .3s}
.module-card:hover{border-color:#7b2ff7;box-shadow:0 8px 30px rgba(123,47,247,.15);transform:translateY(-4px)}
.module-icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,rgba(0,212,255,.15),rgba(123,47,247,.15));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.module-card h3{font-size:1.1rem;margin-bottom:10px}
.module-card p{font-size:.9rem;color:#8a94a8;line-height:1.6}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,45,120,.1);border-radius:14px;overflow:hidden;text-align:center;transition:all .3s}
.expert-card:hover{border-color:#ff2d78;box-shadow:0 8px 30px rgba(255,45,120,.12)}
.expert-avatar{width:100%;aspect-ratio:1;overflow:hidden}
.expert-avatar img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.expert-card:hover .expert-avatar img{transform:scale(1.05)}
.expert-info{padding:20px}
.expert-info h3{font-size:1.1rem;margin-bottom:4px}
.expert-info .role{color:#ff2d78;font-size:.85rem;margin-bottom:10px}
.expert-info p{font-size:.85rem;color:#8a94a8;line-height:1.6;margin-bottom:14px}
.expert-links{display:flex;gap:10px;justify-content:center}
.expert-links a{padding:6px 16px;font-size:.8rem;border:1px solid rgba(0,212,255,.3);border-radius:20px;color:#00d4ff;transition:all .3s}
.expert-links a:hover{background:#00d4ff;color:#0a0e27}

/* === AI赋能 === */
.ai-section{background:linear-gradient(180deg,rgba(123,47,247,.06) 0%,transparent 100%)}
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px}
.ai-card{display:flex;gap:20px;background:rgba(255,255,255,.03);border:1px solid rgba(0,212,255,.1);border-radius:14px;padding:24px;transition:all .3s}
.ai-card:hover{border-color:#00d4ff;box-shadow:0 6px 25px rgba(0,212,255,.1)}
.ai-card .icon-box{flex-shrink:0;width:52px;height:52px;background:linear-gradient(135deg,#00d4ff,#7b2ff7);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.ai-card h3{font-size:1.05rem;margin-bottom:6px}
.ai-card p{font-size:.88rem;color:#8a94a8;line-height:1.6}

/* === 社区板块 === */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px}
.community-item{background:rgba(255,255,255,.03);border:1px solid rgba(0,212,255,.08);border-radius:12px;padding:22px 16px;text-align:center;transition:all .3s;cursor:pointer}
.community-item:hover{border-color:#00d4ff;background:rgba(0,212,255,.06);transform:translateY(-3px)}
.community-item .emoji{font-size:2.2rem;margin-bottom:10px}
.community-item h4{font-size:.95rem;margin-bottom:6px}
.community-item p{font-size:.8rem;color:#7a8599}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(0,212,255,.1);border-radius:10px;margin-bottom:12px;overflow:hidden;background:rgba(255,255,255,.02)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;transition:background .3s}
.faq-question:hover{background:rgba(0,212,255,.05)}
.faq-question .arrow{transition:transform .3s;color:#00d4ff;font-size:1.2rem}
.faq-item.open .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.open .faq-answer{max-height:500px;padding:0 24px 18px}
.faq-answer p{font-size:.92rem;color:#8a94a8;line-height:1.7}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,45,120,.08);border-radius:12px;padding:24px;transition:all .3s}
.review-card:hover{border-color:rgba(255,45,120,.25)}
.review-stars{color:#ffb800;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-text{font-size:.92rem;color:#c0c8d8;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-author .avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#00d4ff,#ff2d78);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.review-author .name{font-size:.88rem;color:#fff}
.review-author .date{font-size:.78rem;color:#7a8599}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:rgba(255,255,255,.04);border:1px solid rgba(0,212,255,.08);border-radius:10px;padding:16px 28px;font-size:.95rem;color:#8a94a8;transition:all .3s}
.partner-wall .partner-item:hover{border-color:#00d4ff;color:#fff}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;counter-reset:step}
.howto-step{background:rgba(255,255,255,.03);border:1px solid rgba(123,47,247,.1);border-radius:12px;padding:28px 22px;text-align:center;counter-increment:step;position:relative}
.howto-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:28px;height:28px;background:linear-gradient(135deg,#7b2ff7,#00d4ff);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;color:#fff}
.howto-step h4{margin:10px 0 8px;font-size:1rem}
.howto-step p{font-size:.88rem;color:#8a94a8}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px}
.contact-card{background:rgba(255,255,255,.03);border:1px solid rgba(0,212,255,.1);border-radius:14px;padding:28px}
.contact-card h3{font-size:1.15rem;margin-bottom:16px;color:#00d4ff}
.contact-item{display:flex;gap:12px;margin-bottom:14px;align-items:flex-start}
.contact-item .label{font-weight:600;min-width:80px;color:#c0c8d8;font-size:.9rem}
.contact-item .value{color:#8a94a8;font-size:.9rem}
.qr-group{display:flex;gap:24px;justify-content:center;margin-top:20px}
.qr-box{text-align:center}
.qr-box img{width:140px;height:140px;border-radius:10px;border:1px solid rgba(0,212,255,.15)}
.qr-box p{margin-top:8px;font-size:.82rem;color:#7a8599}

/* === 分享按钮 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:8px 20px;border-radius:20px;font-size:.85rem;font-weight:600;border:none;cursor:pointer;transition:all .3s;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#fb7299}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}

/* === 页脚 === */
.site-footer{background:rgba(0,0,0,.3);border-top:1px solid rgba(0,212,255,.1);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:1rem;margin-bottom:14px;color:#fff}
.footer-col a{display:block;padding:4px 0;font-size:.88rem;color:#7a8599;transition:color .3s}
.footer-col a:hover{color:#00d4ff}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.06);font-size:.82rem;color:#5a6478}
.footer-bottom .update-time{margin-top:6px;color:#7a8599}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{height:32px}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#7a8599}
.breadcrumb a{color:#00d4ff}
.breadcrumb span{margin:0 6px;color:#5a6478}

/* === 内页通用 === */
.page-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(180deg,rgba(0,212,255,.06) 0%,transparent 100%)}
.page-hero h1{font-size:2.2rem;margin-bottom:10px}
.page-hero p{color:#8a94a8;font-size:1rem}
.page-content{padding:40px 0 60px}
.page-content h2{font-size:1.6rem;margin:30px 0 16px;color:#00d4ff}
.page-content h3{font-size:1.25rem;margin:24px 0 12px}
.page-content p{margin-bottom:16px;color:#c0c8d8;line-height:1.8}
.page-content .img-wrap{margin:24px 0;border-radius:12px;overflow:hidden}

/* === 标签云 === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.tag-cloud a{padding:6px 16px;font-size:.82rem;background:rgba(0,212,255,.08);color:#00d4ff;border-radius:20px;border:1px solid rgba(0,212,255,.15);transition:all .3s}
.tag-cloud a:hover{background:#00d4ff;color:#0a0e27}

/* === 响应式 === */
@media(max-width:768px){
  .header-inner{padding:0 16px}
  .main-nav{position:fixed;top:68px;left:0;width:100%;background:rgba(10,14,39,.98);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid rgba(0,212,255,.1)}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:12px 16px;width:100%;text-align:left}
  .nav-toggle{display:flex}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:1rem}
  .hero-banner{min-height:400px}
  .section-title h2{font-size:1.5rem}
  .section-wrap{padding:40px 0}
  .ai-grid{grid-template-columns:1fr}
  .ai-card{flex-direction:column;text-align:center}
  .contact-grid{grid-template-columns:1fr}
  .qr-group{flex-direction:column;align-items:center}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .footer-top{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.5rem}
  .footer-top{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:repeat(2,1fr)}
}

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

/* === EEAT编辑信息栏 === */
.eeat-bar{padding:10px 0;margin-bottom:10px}
.eeat-info{font-size:.82rem;color:#7a8599;text-align:center;padding:8px 16px;background:rgba(0,212,255,.04);border-radius:8px;border:1px solid rgba(0,212,255,.08)}
.eeat-info strong{color:#00d4ff}

/* === 移动端触摸播放按钮始终可见 === */
@media(hover:none) and (pointer:coarse){
  .play-btn{opacity:.85!important}
  .video-card:active .play-btn{opacity:1!important;background:rgba(0,212,255,1)}
}