/* =====================================================================
   天堂岛视频论坛 - 主样式文件
   域名：fs505222.cn
   主题：海洋蓝 + 热带金色
   ===================================================================== */

/* ── CSS 变量 ──────────────────────────────────────────────────────── */
:root {
    --primary:      #0ea5e9;
    --primary-dark:  #0284c7;
    --primary-light: #38bdf8;
    --accent:       #f59e0b;
    --accent-dark:  #d97706;
    --bg-body:      #0a0f1a;
    --bg-card:      #111827;
    --bg-section:   #0d1321;
    --bg-header:    rgba(10,15,26,.95);
    --text-main:    #f1f5f9;
    --text-muted:   #94a3b8;
    --text-dim:     #64748b;
    --border:       #1e293b;
    --radius:       12px;
    --radius-sm:    8px;
    --shadow:       0 4px 24px rgba(0,0,0,.35);
    --shadow-sm:    0 2px 12px rgba(0,0,0,.25);
    --transition:   .3s cubic-bezier(.4,0,.2,1);
    --container:    1200px;
    --gold-gradient: linear-gradient(135deg,#f59e0b,#fbbf24);
}

/* ── 重置 ──────────────────────────────────────────────────────────── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
     background:var(--bg-body);color:var(--text-main);line-height:1.7;min-height:100vh;
     overflow-x:hidden;font-size:15px;}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition);}
a:hover{color:var(--accent);}
img{max-width:100%;height:auto;display:block;}
ul,ol{list-style:none;}
button,input,select,textarea{font:inherit;border:none;outline:none;background:none;color:inherit;}
hr.divider{border:none;height:1px;background:var(--border);margin:0;}

/* ── 辅助 ──────────────────────────────────────────────────────────── */
.skip-link{position:absolute;top:-100%;left:0;background:var(--primary);color:#fff;padding:8px 16px;
           z-index:9999;border-radius:0 0 var(--radius-sm) 0;font-size:.85rem;}
.skip-link:focus{top:0;}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ── 顶部公告栏 ───────────────────────────────────────────────────── */
.top-bar{background:linear-gradient(90deg,#0c1425,#0f1b30);padding:8px 0;font-size:.78rem;
         color:var(--text-muted);border-bottom:1px solid var(--border);}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px;}
.top-bar a{color:var(--primary-light);font-weight:500;}

/* ── 头部导航 ──────────────────────────────────────────────────────── */
.header{background:var(--bg-header);backdrop-filter:blur(12px);
        border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;}
.header-inner{display:flex;align-items:center;gap:20px;padding:12px 20px;}
.logo{flex-shrink:0;}
.logo a{display:flex;align-items:center;}
.logo img{height:42px;width:auto;}

/* 搜索框 */
.search-box{flex:1;max-width:420px;}
.search-box form{display:flex;background:var(--bg-card);border:1px solid var(--border);
                 border-radius:var(--radius);overflow:hidden;transition:border-color var(--transition);}
.search-box form:focus-within{border-color:var(--primary);}
.search-box input{flex:1;padding:10px 16px;font-size:.88rem;background:transparent;}
.search-box input::placeholder{color:var(--text-dim);}
.search-box button{padding:10px 16px;color:var(--primary-light);cursor:pointer;transition:color var(--transition);}
.search-box button:hover{color:var(--accent);}

/* 导航菜单 */
.nav-menu ul{display:flex;gap:4px;align-items:center;}
.nav-link{padding:8px 14px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:500;
          color:var(--text-muted);transition:all var(--transition);white-space:nowrap;}
.nav-link:hover{color:var(--text-main);background:rgba(14,165,233,.1);}

/* 移动端菜单按钮 */
.mobile-toggle{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer;}
.mobile-toggle span{width:24px;height:2px;background:var(--text-main);border-radius:2px;transition:var(--transition);}
.mobile-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px);}
.mobile-toggle.active span:nth-child(2){opacity:0;}
.mobile-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px);}
.mobile-nav{display:none;background:var(--bg-card);border-top:1px solid var(--border);padding:16px 20px;}
.mobile-nav.active{display:block;}
.mobile-nav ul{display:flex;flex-direction:column;gap:4px;}
.mobile-nav a{display:block;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-muted);
              font-size:.92rem;transition:all var(--transition);}
.mobile-nav a:hover{background:rgba(14,165,233,.1);color:var(--text-main);}

/* ── 面包屑 ────────────────────────────────────────────────────────── */
.breadcrumb{padding:16px 0 8px;font-size:.82rem;color:var(--text-dim);}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:4px;align-items:center;}
.breadcrumb li::after{content:"›";margin-left:8px;color:var(--text-dim);}
.breadcrumb li:last-child::after{content:"";}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--primary-light);}

/* ── Hero ──────────────────────────────────────────────────────────── */
.hero{background:linear-gradient(135deg,#0a1628 0%,#0c2340 40%,#0e3a5e 100%);
      padding:60px 0 50px;text-align:center;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;
              background:radial-gradient(circle at 30% 50%,rgba(14,165,233,.08) 0%,transparent 50%);
              animation:heroPulse 8s ease-in-out infinite;}
@keyframes heroPulse{0%,100%{opacity:.5;transform:scale(1);}50%{opacity:1;transform:scale(1.1);}}
.hero-badge{display:inline-block;background:rgba(14,165,233,.15);border:1px solid rgba(14,165,233,.3);
            color:var(--primary-light);padding:6px 18px;border-radius:20px;font-size:.82rem;margin-bottom:20px;}
.hero h2{font-size:2.4rem;font-weight:900;line-height:1.3;margin-bottom:16px;
         background:linear-gradient(135deg,#f1f5f9,#38bdf8);-webkit-background-clip:text;
         -webkit-text-fill-color:transparent;background-clip:text;}
.hero p{color:var(--text-muted);font-size:1rem;max-width:620px;margin:0 auto 28px;line-height:1.8;}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ── 按钮 ──────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:var(--radius);
     font-weight:600;font-size:.9rem;cursor:pointer;transition:all var(--transition);text-align:center;}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;
             box-shadow:0 4px 16px rgba(14,165,233,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(14,165,233,.45);color:#fff;}
.btn-outline{border:2px solid var(--primary);color:var(--primary-light);background:transparent;}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}
.btn-accent{background:var(--gold-gradient);color:#1a1a2e;font-weight:700;
            box-shadow:0 4px 16px rgba(245,158,11,.3);}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(245,158,11,.45);color:#1a1a2e;}

/* ── 统计栏 ────────────────────────────────────────────────────────── */
.stats-bar{background:var(--bg-card);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:28px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.stat-num{font-size:1.8rem;font-weight:900;color:var(--primary-light);display:block;}
.stat-label{font-size:.82rem;color:var(--text-muted);margin-top:4px;}

/* ── 通用 Section ──────────────────────────────────────────────────── */
.section{padding:48px 0;}
.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;flex-wrap:wrap;gap:12px;}
.section-title{font-size:1.5rem;font-weight:800;position:relative;padding-left:16px;}
.section-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;
                       background:var(--gold-gradient);border-radius:2px;}
.section-more{color:var(--primary-light);font-size:.88rem;font-weight:500;}
.section-more:hover{color:var(--accent);}

/* ── 分类网格 ──────────────────────────────────────────────────────── */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px;}
.category-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
               padding:20px 12px;text-align:center;transition:all var(--transition);cursor:pointer;display:block;}
.category-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow);}
.category-icon{font-size:2rem;display:block;margin-bottom:8px;}
.category-name{font-size:.88rem;font-weight:600;margin-bottom:4px;}
.category-count{font-size:.75rem;color:var(--text-dim);}

/* ── 视频卡片 ──────────────────────────────────────────────────────── */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px;}
.video-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
            overflow:hidden;transition:all var(--transition);}
.video-card:hover{border-color:var(--primary);transform:translateY(-6px);box-shadow:var(--shadow);}
.video-card a{display:block;color:inherit;}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#1a2332;}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.video-card:hover .video-thumb img{transform:scale(1.08);}
.video-tag{position:absolute;top:10px;left:10px;background:var(--primary);color:#fff;
           padding:3px 10px;border-radius:4px;font-size:.72rem;font-weight:600;z-index:2;}
.video-tag.gold{background:var(--accent);color:#1a1a2e;}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.8);color:#fff;
                padding:2px 8px;border-radius:4px;font-size:.72rem;font-weight:600;z-index:2;}
.play-overlay{position:absolute;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;
              justify-content:center;opacity:0;transition:opacity var(--transition);z-index:3;}
.video-card:hover .play-overlay{opacity:1;}
.play-icon{width:52px;height:52px;background:rgba(14,165,233,.9);border-radius:50%;
           display:flex;align-items:center;justify-content:center;
           box-shadow:0 4px 20px rgba(14,165,233,.5);transition:transform var(--transition);}
.video-card:hover .play-icon{transform:scale(1.15);}
.play-icon svg{fill:#fff;margin-left:3px;}
.video-info{padding:16px;}
.video-title{font-size:.95rem;font-weight:700;line-height:1.4;margin-bottom:8px;
             display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.video-desc{font-size:.8rem;color:var(--text-muted);line-height:1.6;margin-bottom:10px;
            display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.video-meta{display:flex;justify-content:space-between;font-size:.75rem;color:var(--text-dim);}

/* ── AI 卡片 ──────────────────────────────────────────────────────── */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px;}
.ai-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
         padding:28px 24px;transition:all var(--transition);}
.ai-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow);}
.ai-icon{font-size:2.2rem;margin-bottom:14px;}
.ai-card h3{font-size:1.05rem;font-weight:700;margin-bottom:10px;}
.ai-card p{font-size:.85rem;color:var(--text-muted);line-height:1.7;}

/* ── 用户评价 ──────────────────────────────────────────────────────── */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px;}
.review-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
             padding:24px;transition:all var(--transition);}
.review-card:hover{border-color:var(--accent);box-shadow:var(--shadow-sm);}
.review-stars{color:var(--accent);font-size:1rem;margin-bottom:12px;letter-spacing:2px;}
.review-text{font-size:.88rem;color:var(--text-muted);line-height:1.8;margin-bottom:16px;font-style:italic;}
.review-author{display:flex;align-items:center;gap:12px;}
.review-avatar{width:40px;height:40px;border-radius:50%;border:2px solid var(--primary);object-fit:cover;}
.review-name{font-size:.85rem;font-weight:600;}
.review-date{font-size:.75rem;color:var(--text-dim);}

/* ── 专家展示 ──────────────────────────────────────────────────────── */
.experts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px;}
.expert-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
             padding:28px 20px;text-align:center;transition:all var(--transition);}
.expert-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow);}
.expert-avatar{width:88px;height:88px;border-radius:50%;margin:0 auto 16px;
               border:3px solid var(--primary);object-fit:cover;}
.expert-name{font-size:1.05rem;font-weight:700;margin-bottom:4px;}
.expert-title{font-size:.8rem;color:var(--primary-light);margin-bottom:12px;}
.expert-desc{font-size:.82rem;color:var(--text-muted);line-height:1.7;margin-bottom:16px;}
.btn-expert{display:inline-block;padding:8px 20px;border:1px solid var(--primary);
            border-radius:var(--radius-sm);color:var(--primary-light);font-size:.82rem;
            font-weight:600;transition:all var(--transition);}
.btn-expert:hover{background:var(--primary);color:#fff;}

/* ── FAQ ──────────────────────────────────────────────────────────── */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-list details{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
                  overflow:hidden;transition:border-color var(--transition);}
.faq-list details[open]{border-color:var(--primary);}
.faq-list summary{padding:18px 24px;font-weight:600;font-size:.95rem;cursor:pointer;
                  list-style:none;display:flex;justify-content:space-between;align-items:center;
                  transition:background var(--transition);}
.faq-list summary:hover{background:rgba(14,165,233,.05);}
.faq-list summary::after{content:"+";font-size:1.3rem;color:var(--primary-light);font-weight:300;
                         transition:transform var(--transition);}
.faq-list details[open] summary::after{content:"−";}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-answer{padding:0 24px 20px;font-size:.88rem;color:var(--text-muted);line-height:1.8;}

/* ── 页面 Hero（子页面） ──────────────────────────────────────────── */
.page-hero{background:linear-gradient(135deg,#0a1628,#0c2340);padding:40px 0;text-align:center;
           border-bottom:1px solid var(--border);}
.page-hero h2{font-size:2rem;font-weight:800;margin-bottom:10px;
              background:linear-gradient(135deg,#f1f5f9,#38bdf8);-webkit-background-clip:text;
              -webkit-text-fill-color:transparent;background-clip:text;}
.page-hero p{color:var(--text-muted);font-size:.95rem;}

/* ── 联系表单 ──────────────────────────────────────────────────────── */
.contact-form{display:flex;flex-direction:column;gap:18px;}
.form-group{display:flex;flex-direction:column;gap:6px;}
.form-group label{font-size:.85rem;font-weight:600;color:var(--text-muted);}
.form-control{padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);
              border-radius:var(--radius-sm);color:var(--text-main);font-size:.9rem;
              transition:border-color var(--transition);}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,165,233,.15);}
textarea.form-control{min-height:120px;resize:vertical;}
select.form-control{cursor:pointer;}

/* ── 分页 ──────────────────────────────────────────────────────────── */
.pagination{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;}
.page-btn{padding:8px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);
          font-size:.82rem;cursor:pointer;transition:all var(--transition);color:var(--text-muted);background:var(--bg-card);}
.page-btn:hover,.page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ── 底部 ──────────────────────────────────────────────────────────── */
.footer{background:var(--bg-card);border-top:1px solid var(--border);padding:48px 0 0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px;
             border-bottom:1px solid var(--border);}
.footer-brand p{font-size:.82rem;color:var(--text-muted);line-height:1.7;margin-top:14px;}
.footer-brand img{height:38px;width:auto;}
.footer-links h3{font-size:.92rem;font-weight:700;margin-bottom:14px;color:var(--text-main);}
.footer-links ul{display:flex;flex-direction:column;gap:8px;}
.footer-links a{font-size:.82rem;color:var(--text-muted);transition:color var(--transition);}
.footer-links a:hover{color:var(--primary-light);}
.footer-share h3{font-size:.92rem;font-weight:700;margin-bottom:14px;color:var(--text-main);}
.share-icons{display:flex;gap:12px;flex-wrap:wrap;}
.share-icon{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
            transition:all var(--transition);border:1px solid var(--border);}
.share-icon:hover{transform:translateY(-3px);}
.share-icon.wechat{color:#07c160;}.share-icon.wechat:hover{background:#07c160;color:#fff;border-color:#07c160;}
.share-icon.weibo{color:#e6162d;}.share-icon.weibo:hover{background:#e6162d;color:#fff;border-color:#e6162d;}
.share-icon.douyin{color:#fe2c55;}.share-icon.douyin:hover{background:#fe2c55;color:#fff;border-color:#fe2c55;}
.share-icon.bilibili{color:#00a1d6;}.share-icon.bilibili:hover{background:#00a1d6;color:#fff;border-color:#00a1d6;}
.footer-bottom{text-align:center;padding:20px 0;font-size:.78rem;color:var(--text-dim);}
.footer-bottom a{color:var(--text-muted);}
.footer-bottom p+p{margin-top:4px;}