:root{--primary:#0A4D8C;--primary-dark:#063566;--secondary:#F26B3A;--accent:#1AABDB;--bg-dark:#0D1B2A;--bg-light:#F4F7FB;--text-main:#1A1A2E;--text-muted:#6B7A99;--white:#FFFFFF;--card-shadow:0 4px 20px rgba(10,77,140,0.12);--radius:12px;--transition: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-main);background:var(--white);line-height:1.7;overflow-x:hidden;}a{color:inherit;text-decoration:none;transition:color var(--transition);}a:hover{color:var(--secondary);}img{max-width:100%;height:auto;display:block;}ul{list-style:none;}.top-bar{background:var(--primary-dark);color:rgba(255,255,255,0.85);font-size:13px;text-align:center;padding:6px 20px;letter-spacing:0.5px;}.top-bar a{color:var(--secondary);}.site-header{position:sticky;top:0;z-index:1000;background:var(--white);box-shadow:0 2px 16px rgba(10,77,140,0.10);}.nav-wrap{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;height:68px;gap:32px;}.logo-area{display:flex;align-items:center;gap:10px;flex-shrink:0;}.logo-area img.site-logo{height:44px;width:auto;}.logo-area .logo-text{font-size:22px;font-weight:800;color:var(--primary);letter-spacing:1px;}.logo-area .logo-text span{color:var(--secondary);}.main-nav{display:flex;align-items:center;gap:4px;flex:1;}.main-nav a{padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text-main);white-space:nowrap;transition:background var(--transition),color var(--transition);}.main-nav a:hover,.main-nav a.active{background:var(--primary);color:var(--white);}.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}.btn-join{background:var(--secondary);color:var(--white) !important;padding:8px 20px;border-radius:24px;font-weight:600;font-size:14px;transition:background var(--transition),transform var(--transition);}.btn-join:hover{background:#d45a2a;transform:translateY(-1px);}.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;}.hamburger span{display:block;width:24px;height:2px;background:var(--primary);border-radius:2px;transition:var(--transition);}.search-bar-wrap{background:var(--bg-light);border-bottom:1px solid #e8eef5;padding:10px 24px;}.search-bar-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:12px;}.search-form{display:flex;align-items:center;background:var(--white);border:2px solid #D0DCF0;border-radius:28px;overflow:hidden;flex:1;max-width:640px;transition:border-color var(--transition);}.search-form:focus-within{border-color:var(--primary);}.search-form input{flex:1;border:none;outline:none;padding:9px 18px;font-size:14px;background:transparent;color:var(--text-main);}.search-form button{background:var(--primary);border:none;color:var(--white);padding:9px 20px;cursor:pointer;font-size:14px;font-weight:500;transition:background var(--transition);}.search-form button:hover{background:var(--primary-dark);}.search-hot-tags{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);flex-wrap:wrap;}.search-hot-tags span{font-weight:500;}.search-hot-tags a{background:#EBF2FF;color:var(--primary);padding:3px 10px;border-radius:12px;font-size:12px;transition:background var(--transition);}.search-hot-tags a:hover{background:var(--primary);color:var(--white);}.breadcrumb{max-width:1280px;margin:0 auto;padding:10px 24px;font-size:13px;color:var(--text-muted);}.breadcrumb a{color:var(--primary);}.breadcrumb a:hover{color:var(--secondary);}.breadcrumb span{margin:0 6px;}.hero-section{position:relative;min-height:580px;background:linear-gradient(135deg,var(--bg-dark) 0%,#0A3D6B 60%,#0A4D8C 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em{font-style:normal;color:var(--secondary);}.hero-desc{font-size:17px;color:rgba(255,255,255,0.80);max-width:560px;margin-bottom:32px;line-height:1.8;}.hero-stats{display:flex;gap:32px;margin-bottom:36px;flex-wrap:wrap;}.hero-stat{text-align:center;}.hero-stat .num{font-size:28px;font-weight:800;color:var(--secondary);display:block;line-height:1;}.hero-stat .label{font-size:13px;color:rgba(255,255,255,0.65);margin-top:4px;}.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}.btn-primary{background:var(--secondary);color:var(--white);padding:13px 32px;border-radius:32px;font-size:16px;font-weight:700;border:none;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px;}.btn-primary:hover{background:#d45a2a;transform:translateY(-2px);box-shadow:0 8px 24px rgba(242,107,58,0.35);}.btn-outline{background:transparent;color:var(--white);padding:12px 30px;border-radius:32px;font-size:16px;font-weight:600;border:2px solid rgba(255,255,255,0.5);cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px;}.btn-outline:hover{border-color:var(--white);background:rgba(255,255,255,0.1);}.section{padding:72px 24px;}.section-inner{max-width:1280px;margin:0 auto;}.section-header{text-align:center;margin-bottom:48px;}.section-tag{display:inline-block;background:linear-gradient(135deg,#EBF2FF,#D6E8FF);color:var(--primary);padding:4px 14px;border-radius:14px;font-size:13px;font-weight:600;margin-bottom:12px;letter-spacing:0.5px;}.section-header h2{font-size:clamp(24px,3.5vw,38px);font-weight:800;color:var(--text-main);margin-bottom:12px;letter-spacing:0.5px;}.section-header h2 em{font-style:normal;color:var(--primary);}.section-header p{font-size:16px;color:var(--text-muted);max-width:560px;margin:0 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.play-btn{background:rgba(0,0,0,0.35);}.play-icon{width:56px;height:56px;background:rgba(255,255,255,0.92);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.8);transition:opacity var(--transition),transform var(--transition);box-shadow:0 4px 20px rgba(0,0,0,0.3);}.video-card:hover .play-icon{opacity:1;transform:scale(1);}.play-icon::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent var(--primary);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;font-weight:500;}.video-badge{position:absolute;top:8px;left:8px;background:var(--secondary);color:var(--white);font-size:11px;padding:2px 8px;border-radius:4px;font-weight:600;}.video-info{padding:14px 16px;}.video-info h3{font-size:15px;font-weight:600;color:var(--text-main);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}.video-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-muted);}.video-meta span{display:flex;align-items:center;gap:4px;}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;}.feature-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--card-shadow);transition:transform var(--transition);border-top:4px solid transparent;}.feature-card:hover{transform:translateY(-4px);border-top-color:var(--primary);}.feature-card .icon{width:52px;height:52px;background:linear-gradient(135deg,#EBF2FF,#D6E8FF);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;}.feature-card h3{font-size:18px;font-weight:700;color:var(--text-main);margin-bottom:10px;}.feature-card p{font-size:14px;color:var(--text-muted);line-height:1.7;}.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;}.expert-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--card-shadow);text-align:center;transition:transform var(--transition);}.expert-card:hover{transform:translateY(-5px);}.expert-avatar{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;}.expert-info{padding:18px 16px;}.expert-info h3{font-size:17px;font-weight:700;color:var(--text-main);margin-bottom:4px;}.expert-info .role{font-size:13px;color:var(--secondary);font-weight:600;margin-bottom:8px;}.expert-info p{font-size:13px;color:var(--text-muted);line-height:1.6;margin-bottom:14px;}.expert-btns{display:flex;gap:8px;justify-content:center;}.btn-sm{padding:6px 14px;border-radius:20px;font-size:13px;font-weight:500;border:1.5px solid var(--primary);color:var(--primary);background:transparent;cursor:pointer;transition:all var(--transition);}.btn-sm:hover,.btn-sm.filled{background:var(--primary);color:var(--white);}.reviews-section{background:var(--bg-light);}.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}.review-card{background:var(--white);border-radius:var(--radius);padding:22px;box-shadow:0 2px 12px rgba(10,77,140,0.07);}.review-stars{color:#FFBA00;font-size:16px;margin-bottom:10px;letter-spacing:2px;}.review-text{font-size:14px;color:var(--text-main);line-height:1.7;margin-bottom:14px;}.review-user{display:flex;align-items:center;gap:10px;}.review-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:var(--white);font-size:15px;font-weight:700;flex-shrink:0;}.review-user-info .name{font-size:14px;font-weight:600;color:var(--text-main);}.review-user-info 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18px;font-size:14px;color:var(--text-muted);line-height:1.8;}.faq-item.open .faq-a{display:block;}.partners-section{background:var(--bg-dark);padding:48px 24px;}.partners-inner{max-width:1280px;margin:0 auto;}.partners-title{text-align:center;color:rgba(255,255,255,0.6);font-size:14px;letter-spacing:2px;text-transform:uppercase;margin-bottom:28px;}.partners-logos{display:flex;align-items:center;justify-content:center;gap:40px;flex-wrap:wrap;}.partner-logo{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:10px;padding:12px 24px;color:rgba(255,255,255,0.65);font-size:15px;font-weight:600;transition:all var(--transition);}.partner-logo:hover{background:rgba(255,255,255,0.15);color:var(--white);}.join-section{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:var(--white);text-align:center;padding:80px 24px;}.join-section h2{font-size:clamp(26px,4vw,42px);font-weight:800;margin-bottom:16px;}.join-section p{font-size:17px;opacity:0.85;max-width:520px;margin:0 auto 32px;}.join-steps{display:flex;justify-content:center;gap:32px;margin-bottom:40px;flex-wrap:wrap;}.join-step{display:flex;flex-direction:column;align-items:center;gap:10px;max-width:160px;}.step-num{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,0.2);border:2px solid rgba(255,255,255,0.5);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;}.join-step p{font-size:14px;opacity:0.85;margin:0;}.contact-section{background:var(--bg-light);}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}.contact-info h3{font-size:22px;font-weight:700;color:var(--text-main);margin-bottom:20px;}.contact-item{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start;}.contact-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:18px;flex-shrink:0;}.contact-detail .label{font-size:12px;color:var(--text-muted);margin-bottom:2px;}.contact-detail .value{font-size:15px;font-weight:600;color:var(--text-main);}.qr-codes{display:flex;gap:24px;flex-wrap:wrap;}.qr-item{text-align:center;}.qr-item img{width:120px;height:120px;border-radius:10px;border:2px solid #E0EAF5;object-fit:cover;}.qr-item p{font-size:13px;color:var(--text-muted);margin-top:8px;}.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}.share-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;border-radius:20px;font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition);border:none;}.share-wechat{background:#07C160;color:var(--white);}.share-weibo{background:#E6162D;color:var(--white);}.share-douyin{background:#010101;color:var(--white);}.share-bilibili{background:#00A1D6;color:var(--white);}.share-btn:hover{opacity:0.85;transform:translateY(-1px);}.site-footer{background:var(--bg-dark);color:rgba(255,255,255,0.7);padding:60px 24px 0;}.footer-inner{max-width:1280px;margin:0 auto;}.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.08);}.footer-brand .logo-area{margin-bottom:16px;}.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:20px;max-width:300px;}.footer-col h4{color:var(--white);font-size:15px;font-weight:700;margin-bottom:16px;}.footer-col ul li{margin-bottom:10px;}.footer-col ul li a{font-size:14px;color:rgba(255,255,255,0.6);transition:color var(--transition);}.footer-col ul li a:hover{color:var(--secondary);}.footer-bottom{padding:20px 0;display:flex;align-items:center;justify-content:space-between;font-size:13px;flex-wrap:wrap;gap:12px;}.footer-bottom a{color:rgba(255,255,255,0.5);}.footer-bottom a:hover{color:var(--secondary);}.page-hero{background:linear-gradient(135deg,var(--bg-dark),var(--primary-dark));padding:60px 24px;text-align:center;color:var(--white);}.page-hero h1{font-size:clamp(28px,4vw,46px);font-weight:800;margin-bottom:12px;}.page-hero p{font-size:16px;opacity:0.8;max-width:560px;margin:0 auto;}.ai-section{background:linear-gradient(135deg,#EBF2FF 0%,#F4F7FB 100%);}.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}.ai-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--card-shadow);border-left:4px solid var(--accent);transition:transform var(--transition);}.ai-card:hover{transform:translateY(-4px);}.ai-card .ai-icon{font-size:36px;margin-bottom:14px;}.ai-card h3{font-size:17px;font-weight:700;color:var(--text-main);margin-bottom:10px;}.ai-card p{font-size:14px;color:var(--text-muted);line-height:1.7;}.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;}.community-card{background:var(--white);border-radius:var(--radius);padding:24px 20px;text-align:center;box-shadow:var(--card-shadow);transition:all var(--transition);cursor:pointer;}.community-card:hover{background:var(--primary);color:var(--white);transform:translateY(-4px);}.community-card .c-icon{font-size:36px;margin-bottom:12px;}.community-card h3{font-size:16px;font-weight:700;margin-bottom:8px;}.community-card p{font-size:13px;color:var(--text-muted);line-height:1.6;}.community-card:hover p{color:rgba(255,255,255,0.8);}@media (max-width:1024px){.footer-top{grid-template-columns:1fr 1fr;}.ai-grid{grid-template-columns:1fr 1fr;}.contact-grid{grid-template-columns:1fr;}}@media (max-width:768px){.main-nav{display:none;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:var(--white);padding:16px;box-shadow:0 8px 24px rgba(0,0,0,0.1);z-index:999;}.main-nav.open{display:flex;}.main-nav a{padding:12px 16px;border-radius:8px;}.hamburger{display:flex;}.hero-section{min-height:480px;}.hero-stats{gap:20px;}.footer-top{grid-template-columns:1fr;gap:28px;}.ai-grid{grid-template-columns:1fr;}.search-hot-tags{display:none;}.video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));}}@media (max-width:480px){.section{padding:48px 16px;}.hero-content{padding:60px 16px;}.hero-btns{flex-direction:column;}.btn-primary,.btn-outline{width:100%;justify-content:center;}.join-steps{gap:20px;}.video-grid{grid-template-columns:1fr;}}@keyframes fadeInUp{from{opacity:0;transform:translateY(24px);}to{opacity:1;transform:translateY(0);}}.fade-in{animation:fadeInUp 0.6s ease forwards;}.fade-in-delay-1{animation-delay:0.1s;opacity:0;}.fade-in-delay-2{animation-delay:0.2s;opacity:0;}.fade-in-delay-3{animation-delay:0.3s;opacity:0;}::-webkit-scrollbar{width:6px;}::-webkit-scrollbar-track{background:#f1f1f1;}::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px;}.article-body{max-width:860px;margin:0 auto;font-size:16px;line-height:1.9;color:var(--text-main);}.article-body h2{font-size:22px;font-weight:700;color:var(--primary);margin:32px 0 14px;padding-bottom:8px;border-bottom:2px solid #E0EAF5;}.article-body h3{font-size:18px;font-weight:600;color:var(--text-main);margin:24px 0 10px;}.article-body p{margin-bottom:16px;}.stats-row{display:flex;gap:24px;background:var(--bg-light);border-radius:var(--radius);padding:24px;margin:24px 0;flex-wrap:wrap;}.stat-item{flex:1;min-width:120px;text-align:center;}.stat-item .n{font-size:28px;font-weight:800;color:var(--primary);display:block;}.stat-item .l{font-size:13px;color:var(--text-muted);}