/* 海角 - 主样式文件 | coyvas.cn */
:root {
  --primary: #0a4f8c;
  --primary-dark: #063366;
  --accent: #e84040;
  --accent-light: #ff6b6b;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --bg: #f8fafc;
  --bg-dark: #0f172a;
  --white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 4px 20px rgba(10,79,140,0.12);
  --shadow-lg: 0 10px 40px rgba(10,79,140,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ===== 顶部公告栏 ===== */
.top-bar{background:var(--primary-dark);color:rgba(255,255,255,0.85);font-size:13px;padding:6px 0;text-align:center}
.top-bar a{color:var(--accent-light);margin:0 8px}

/* ===== 导航栏 ===== */
.header{background:var(--white);box-shadow:var(--shadow);position:sticky;top:0;z-index:1000;transition:var(--transition)}
.header.scrolled{box-shadow:0 2px 30px rgba(10,79,140,0.2)}
.nav-wrapper{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}
.logo-area{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-img{width:44px;height:44px;object-fit:contain;border-radius:8px}
.logo-text{font-size:22px;font-weight:800;color:var(--primary);letter-spacing:1px}
.logo-text span{color:var(--accent)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text);transition:var(--transition);white-space:nowrap}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary);background:rgba(10,79,140,0.08)}
.nav-actions{display:flex;align-items:center;gap:10px}
.btn-login{padding:8px 20px;border-radius:8px;background:var(--primary);color:var(--white);font-size:14px;font-weight:600;transition:var(--transition)}
.btn-login:hover{background:var(--primary-dark);transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}
.hamburger span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* ===== 搜索栏 ===== */
.search-bar-wrap{background:linear-gradient(135deg,var(--primary) 0%,#1565c0 100%);padding:16px 0}
.search-inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:12px}
.search-form{flex:1;max-width:700px;display:flex;align-items:center;background:var(--white);border-radius:30px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,0.15)}
.search-form input{flex:1;padding:12px 20px;border:none;outline:none;font-size:15px;color:var(--text);background:transparent}
.search-form button{padding:12px 24px;background:var(--accent);color:var(--white);font-size:14px;font-weight:600;border-radius:0 30px 30px 0;transition:var(--transition)}
.search-form button:hover{background:#c0392b}
.search-hot{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,0.8);font-size:13px}
.search-hot a{color:rgba(255,255,255,0.9);padding:4px 10px;background:rgba(255,255,255,0.15);border-radius:20px;font-size:12px;transition:var(--transition)}
.search-hot a:hover{background:rgba(255,255,255,0.3)}

/* ===== 面包屑 ===== */
.breadcrumb{background:var(--white);border-bottom:1px solid var(--border);padding:10px 0}
.breadcrumb-inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted)}
.breadcrumb-inner a{color:var(--primary)}
.breadcrumb-inner span{color:var(--text-muted)}

/* ===== 容器 ===== */
.container{max-width:1280px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-sm{padding:40px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;font-weight:800;color:var(--text);margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:var(--accent);border-radius:2px}
.section-title p{color:var(--text-muted);font-size:16px;margin-top:14px}

/* ===== 英雄区 ===== */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,#0a4f8c 0%,#1565c0 50%,#0d47a1 100%)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0.2}
.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:60px 20px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text h1{font-size:46px;font-weight:900;color:var(--white);line-height:1.2;margin-bottom:16px}
.hero-text h1 em{color:#ffd700;font-style:normal}
.hero-text p{font-size:18px;color:rgba(255,255,255,0.85);margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{padding:14px 32px;background:var(--accent);color:var(--white);border-radius:30px;font-size:16px;font-weight:700;transition:var(--transition);display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{background:#c0392b;transform:translateY(-2px);box-shadow:0 8px 25px rgba(232,64,64,0.4)}
.btn-outline{padding:14px 32px;border:2px solid rgba(255,255,255,0.7);color:var(--white);border-radius:30px;font-size:16px;font-weight:600;transition:var(--transition)}
.btn-outline:hover{background:rgba(255,255,255,0.15);border-color:var(--white)}
.hero-stats{display:flex;gap:30px;margin-top:30px}
.hero-stat{text-align:center}
.hero-stat strong{display:block;font-size:28px;font-weight:800;color:#ffd700}
.hero-stat span{font-size:13px;color:rgba(255,255,255,0.75)}
.hero-visual{position:relative}
.hero-img-main{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.hero-img-main img{width:100%;height:320px;object-fit:cover}
.hero-badge{position:absolute;bottom:-20px;left:-20px;background:var(--white);border-radius:var(--radius);padding:14px 18px;box-shadow:var(--shadow);display:flex;align-items:center;gap:10px}
.hero-badge-icon{width:40px;height:40px;background:var(--accent);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:20px}
.hero-badge-text strong{display:block;font-size:15px;color:var(--text)}
.hero-badge-text span{font-size:12px;color:var(--text-muted)}

/* ===== 视频卡片 ===== */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0);transition:var(--transition)}
.video-card:hover .video-play-btn{background:rgba(0,0,0,0.35)}
.play-icon{width:54px;height:54px;background:rgba(255,255,255,0.95);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.7);transition:var(--transition)}
.video-card:hover .play-icon{opacity:1;transform:scale(1)}
.play-icon::after{content:'';border-left:18px solid var(--primary);border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.75);color:var(--white);font-size:12px;padding:2px 7px;border-radius:4px}
.video-tag{position:absolute;top:8px;left:8px;background:var(--accent);color:var(--white);font-size:11px;padding:3px 8px;border-radius:4px;font-weight:600}
.video-info{padding:14px}
.video-info h3{font-size:14px;font-weight:600;color:var(--text);line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-muted)}
.video-meta span{display:flex;align-items:center;gap:4px}

/* ===== 栏目分类 ===== */
.category-tabs{display:flex;gap:10px;margin-bottom:28px;flex-wrap:wrap}
.cat-tab{padding:8px 20px;border-radius:20px;font-size:14px;font-weight:500;color:var(--text-muted);background:var(--white);border:1px solid var(--border);cursor:pointer;transition:var(--transition)}
.cat-tab.active,.cat-tab:hover{background:var(--primary);color:var(--white);border-color:var(--primary)}

/* ===== 专家卡片 ===== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:var(--white);border-radius:var(--radius-lg);padding:28px 20px;text-align:center;box-shadow:var(--shadow);transition:var(--transition)}
.expert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.expert-avatar{width:90px;height:90px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid var(--primary)}
.expert-name{font-size:17px;font-weight:700;color:var(--text);margin-bottom:4px}
.expert-title{font-size:13px;color:var(--primary);font-weight:500;margin-bottom:10px}
.expert-desc{font-size:13px;color:var(--text-muted);line-height:1.6;margin-bottom:14px}
.expert-awards{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:14px}
.award-tag{font-size:11px;padding:3px 8px;background:rgba(10,79,140,0.08);color:var(--primary);border-radius:4px}
.expert-btns{display:flex;gap:8px;justify-content:center}
.btn-sm{padding:7px 16px;border-radius:8px;font-size:13px;font-weight:600;transition:var(--transition)}
.btn-sm-primary{background:var(--primary);color:var(--white)}
.btn-sm-primary:hover{background:var(--primary-dark)}
.btn-sm-outline{border:1px solid var(--primary);color:var(--primary)}
.btn-sm-outline:hover{background:var(--primary);color:var(--white)}

/* ===== 合作品牌 ===== */
.partner-grid{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}
.partner-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:16px 28px;font-size:15px;font-weight:600;color:var(--text-muted);transition:var(--transition)}
.partner-item:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow)}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,0.06);overflow:hidden}
.faq-q{padding:18px 24px;font-size:15px;font-weight:600;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-q:hover{color:var(--primary)}
.faq-q::after{content:'＋';font-size:20px;color:var(--primary);transition:var(--transition)}
.faq-item.open .faq-q::after{content:'－'}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.3s ease,padding 0.3s ease;font-size:14px;color:var(--text-muted);line-height:1.8}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}

/* ===== 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:var(--white);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:var(--transition)}
.review-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:var(--white);font-size:18px;font-weight:700;flex-shrink:0}
.review-user strong{display:block;font-size:14px;color:var(--text)}
.review-user span{font-size:12px;color:var(--text-muted)}
.review-stars{color:#f59e0b;font-size:14px;margin-bottom:8px}
.review-text{font-size:13px;color:var(--text-muted);line-height:1.7}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info h3{font-size:22px;font-weight:700;margin-bottom:20px;color:var(--text)}
.contact-item{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}
.contact-icon{width:44px;height:44px;background:rgba(10,79,140,0.1);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-item-text strong{display:block;font-size:14px;color:var(--text);margin-bottom:3px}
.contact-item-text span{font-size:13px;color:var(--text-muted)}
.qr-group{display:flex;gap:24px;margin-top:24px}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:10px;border:2px solid var(--border)}
.qr-item p{font-size:12px;color:var(--text-muted);margin-top:8px}

/* ===== 社交分享 ===== */
.share-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-label{font-size:14px;color:var(--text-muted)}
.share-btn{padding:8px 18px;border-radius:20px;font-size:13px;font-weight:600;color:var(--white);transition:var(--transition);display:inline-flex;align-items:center;gap:6px}
.share-btn:hover{transform:translateY(-2px);opacity:0.9}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#000000}
.share-bilibili{background:#00a1d6}

/* ===== 底部 ===== */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.75);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .logo-text{color:var(--white);font-size:24px;margin-bottom:12px;display:block}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:20px}
.footer-col h4{font-size:15px;font-weight:700;color:var(--white);margin-bottom:16px}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:13px;color:rgba(255,255,255,0.6);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:20px 0;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,0.5)}
.footer-bottom a{color:rgba(255,255,255,0.6)}
.footer-bottom a:hover{color:var(--white)}

/* ===== 内页通用 ===== */
.page-hero{background:linear-gradient(135deg,var(--primary) 0%,#1565c0 100%);padding:60px 0;color:var(--white);text-align:center}
.page-hero h1{font-size:38px;font-weight:800;margin-bottom:12px}
.page-hero p{font-size:16px;opacity:0.85;max-width:600px;margin:0 auto}
.page-content{max-width:1280px;margin:0 auto;padding:50px 20px}
.content-intro{background:var(--white);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);margin-bottom:40px;font-size:15px;line-height:1.9;color:var(--text)}
.content-intro h2{font-size:22px;font-weight:700;color:var(--primary);margin-bottom:14px}

/* ===== 标签 ===== */
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tag{padding:5px 14px;background:rgba(10,79,140,0.08);color:var(--primary);border-radius:20px;font-size:13px;font-weight:500}
.tag-hot{background:rgba(232,64,64,0.1);color:var(--accent)}

/* ===== 加载更多 ===== */
.load-more{text-align:center;margin-top:40px}
.btn-load{padding:12px 40px;border:2px solid var(--primary);color:var(--primary);border-radius:30px;font-size:15px;font-weight:600;transition:var(--transition)}
.btn-load:hover{background:var(--primary);color:var(--white)}

/* ===== AI赋能模块 ===== */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(135deg,var(--primary) 0%,#1565c0 100%);border-radius:var(--radius-lg);padding:30px;color:var(--white);transition:var(--transition)}
.ai-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.ai-icon{font-size:40px;margin-bottom:16px}
.ai-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.ai-card p{font-size:14px;opacity:0.85;line-height:1.7}

/* ===== 社区功能 ===== */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.community-card{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border-left:4px solid var(--primary);transition:var(--transition)}
.community-card:hover{transform:translateX(4px)}
.community-card h3{font-size:16px;font-weight:700;color:var(--text);margin-bottom:8px}
.community-card p{font-size:13px;color:var(--text-muted);line-height:1.7}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-content{grid-template-columns:1fr;gap:30px}
  .hero-visual{display:none}
}
@media(max-width:768px){
  .nav-menu{display:none;position:fixed;top:70px;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;box-shadow:var(--shadow-lg);z-index:999}
  .nav-menu.open{display:flex}
  .hamburger{display:flex}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .ai-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .hero-text h1{font-size:30px}
  .section-title h2{font-size:24px}
  .search-hot{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:10px;text-align:center}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .hero-btns{flex-direction:column}
  .hero-stats{gap:16px}
}

/* ===== 动画 ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp 0.6s ease forwards}
.lazy{opacity:0;transition:opacity 0.4s ease}
.lazy.loaded{opacity:1}

/* ===== 滚动条 ===== */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#f1f5f9}
::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px}

/* ===== 视频播放弹窗 ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.85);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.3s}
.modal-overlay.active{opacity:1;pointer-events:all}
.modal-box{background:var(--bg-dark);border-radius:var(--radius-lg);padding:20px;max-width:800px;width:90%;position:relative}
.modal-close{position:absolute;top:12px;right:16px;color:var(--white);font-size:24px;cursor:pointer;opacity:0.7;transition:var(--transition)}
.modal-close:hover{opacity:1}
.modal-video{width:100%;aspect-ratio:16/9;background:#000;border-radius:10px;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.5);font-size:16px}

/* ===== 更新时间 ===== */
.update-time{font-size:12px;color:var(--text-muted);margin-top:6px}