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.action-btn{text-align:center;padding:.4rem .8rem;font-size:.8rem}}.course-container{margin-top:1rem}.course-container .courses-grid{grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:3rem;display:grid}.course-container .course-card{color:inherit;background:linear-gradient(135deg,#2c3e50 0%,#34495e 100%);border:1px solid #fff3;border-radius:16px;text-decoration:none;transition:all .3s;position:relative;overflow:hidden}.course-container .course-card:hover{border-color:#3b82f6}.course-container .card-link{color:inherit;text-decoration:none;display:block}.course-container .course-cover{width:100%;height:200px;position:relative;overflow:hidden}.course-container .course-cover .cover-img{background-color:#ffffff1a;justify-content:center;align-items:center;width:100%;height:100%;font-size:20px;font-weight:700;display:flex}.course-container .course-cover .course-status-badge{z-index:2;border-radius:6px;padding:.25rem .5rem;font-size:12px;font-weight:600;position:absolute;top:12px;right:12px}.course-container .course-cover .course-status-badge.ongoing{color:#92400e;background:#fbbf24}.course-container .course-cover .course-status-badge.completed{color:#fff;background:#10b981}.course-container .course-content{padding:1.5rem}.course-container .course-header{margin-bottom:1rem}.course-container .course-title{color:#fff;margin:0 0 .5rem;font-size:1.2rem;font-weight:700;line-height:1.3}.course-container .course-meta{gap:.75rem;display:flex}.course-container .course-meta .course-type{color:#0369a1;background:#e0f2fe;border-radius:12px;padding:.25rem .75rem;font-size:.75rem;font-weight:500}.course-container .course-meta .course-level{border-radius:12px;padding:.25rem .75rem;font-size:.75rem;font-weight:500}.course-container .course-meta .course-level.beginner{color:#166534;background:#dcfce7}.course-container .course-meta .course-level.intermediate{color:#92400e;background:#fef3c7}.course-container .course-meta .course-level.advanced{color:#991b1b;background:#fee2e2}.course-container .course-description{color:#35d763;margin-bottom:1.5rem;font-size:.9rem;line-height:1.6}.course-container .course-footer{border-top:1px solid #e2e8f0;justify-content:space-between;align-items:center;padding-top:1rem;display:flex}.course-container .course-footer .course-price{align-items:center;gap:.5rem;display:flex}.course-container .course-footer .course-price .current-price{color:#ef4444;font-size:1.25rem;font-weight:700}.course-container .course-footer .course-price .price-note{color:#9ca3af;font-size:.85rem}.course-container .course-footer .course-price .original-price{color:#9ca3af;font-size:.9rem;text-decoration:line-through}.course-container .course-footer .course-progress{align-items:center;gap:.25rem;display:flex}.course-container .course-footer .course-progress .progress-text{color:#64748b;font-size:12px;font-weight:500}.course-container .course-footer .course-progress 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.group-card:hover{border-color:#3b82f6}.wechat-groups .group-card:hover .join-arrow span{transform:translate(3px)}.wechat-groups .group-icon{background:linear-gradient(135deg,#07c160 0%,#38d9a9 100%);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:50px;height:50px;display:flex}.wechat-groups .group-icon .icon{font-size:24px}.wechat-groups .group-content{flex:1}.wechat-groups .group-name{color:#fff;margin:0 0 .25rem;font-size:1rem;font-weight:600}.wechat-groups .group-desc{color:#a0a6b0;margin:0;font-size:.85rem;line-height:1.4}.wechat-groups .join-arrow{color:#07c160;font-size:1.2rem;font-weight:700}.wechat-groups .join-arrow span{transition:transform .3s}@media (width<=768px){.wechat-groups .groups-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.6rem}.wechat-groups .group-card{padding:.75rem}.wechat-groups .group-card .group-icon{width:40px;height:40px}.wechat-groups .group-card .group-icon .icon{font-size:20px}}.friends-container 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.friend-description{color:#a0a6b0;margin:0;font-size:12px;line-height:1.4}@media (width<=768px){.friends-container .friends-grid{grid-template-columns:1fr 1fr;gap:.6rem}.friends-container .friend-info .friend-name{font-size:14px}}.hosting-container .hosting-images{flex-direction:column;justify-content:center;align-items:center;gap:2rem;display:flex}.hosting-container .hosting-item img{border-radius:12px;width:auto;max-width:100%;height:100px;transition:all .3s;box-shadow:0 4px 12px #0000001a}.hosting-container .hosting-item img:hover{transform:translateY(-4px);box-shadow:0 8px 25px #00000026}@media (width<=768px){.hosting-container .hosting-images{flex-direction:column;align-items:center;gap:1.5rem}.hosting-container .hosting-item{width:100%;max-width:400px}.hosting-container .hosting-item img{height:auto}}.site-footer{color:#e2e8f0;background:linear-gradient(135deg,#1e293b 0%,#334155 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.footer-brand .brand-description{color:#cbd5e1;max-width:300px;margin:0;font-size:14px;line-height:1.6}.site-footer .footer-links{grid-template-columns:repeat(4,1fr);gap:2rem;display:grid}.site-footer .link-group .group-title{color:#fff;margin:0 0 1rem;font-size:16px;font-weight:600}.site-footer .link-group .link-list{margin:0;padding:0;list-style:none}.site-footer .link-group .link-list li{margin-bottom:.5rem}.site-footer .link-group .link-list li a{color:#94a3b8;font-size:14px;text-decoration:none;transition:color .3s}.site-footer .link-group .link-list li a:hover{color:var(--primary-color)}.site-footer .link-group .link-list li .contact-item{color:#94a3b8;font-size:14px}.site-footer .footer-bottom{border-top:1px solid #ffffff1a;justify-content:space-between;align-items:center;padding-top:2rem;display:flex}.site-footer .copyright p{color:#94a3b8;margin:0 0 .25rem;font-size:13px}.site-footer .copyright p a{color:#94a3b8;text-decoration:none}.site-footer .copyright p a:hover{color:var(--primary-color)}.site-footer .footer-stats{align-items:center;gap:1rem;display:flex}.site-footer .footer-stats .stat-item{color:#64748b;font-size:13px}.site-footer .footer-stats .stat-divider{color:#475569;font-size:13px}@media (width<=1024px){.site-footer .footer-main{grid-template-columns:1fr;gap:2rem}.site-footer .footer-links{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.site-footer .footer-container{padding:2rem 10px 1.5rem}.site-footer .footer-links{grid-template-columns:1fr 1fr;gap:1.5rem}.site-footer .link-group:first-of-type,.site-footer .link-group:nth-of-type(3){text-align:right}.site-footer .footer-bottom{text-align:center;flex-direction:column;gap:1rem}.site-footer .footer-stats{gap:.5rem}.site-footer .footer-stats .stat-divider{display:none}}:root{--primary-color:#f0db4f;--primary-dark:#d4c143;--primary-light:#f5e66a;--primary-alpha-10:#f0db4f1a;--primary-alpha-20:#f0db4f33;--primary-alpha-30:#f0db4f4d;--secondary-color:#1e293b;--accent-color:#3b82f6;--text-primary:#1e293b;--text-secondary:#64748b;--text-muted:#94a3b8;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-muted:#f1f5f9;--border-color:#e2e8f0;--border-hover:var(--primary-color);--success-color:#10b981;--warning-color:#f59e0b;--error-color:#ef4444;--info-color:#3b82f6;--max-width:1600px;--container-padding:15px}*{box-sizing:border-box;border:0;outline:0;margin:0;padding:0}body{margin:0}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-muted)}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--primary-dark)}::selection{background:var(--primary-alpha-30);color:var(--text-primary)}a{color:var(--primary-color);transition:color 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auto}.app-contact-modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:3000;background:#000c;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.app-contact-modal{background:#fff;border-radius:16px;width:100%;max-width:400px;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.app-contact-modal-header{justify-content:space-between;align-items:center;padding:1.5rem 1.5rem 0;display:flex}.app-contact-modal-header .app-contact-modal-title{color:#333;margin:0;font-size:24px;font-weight:700}.app-contact-modal-header .app-contact-modal-close{color:#999;cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;padding:0;font-size:32px;transition:all .3s;display:flex}.app-contact-modal-header .app-contact-modal-close:hover{color:#333;background:#f5f5f5}.app-contact-modal-content{padding:1.5rem}.app-contact-info{text-align:center}.app-wechat-section{background-color:#f8f9fa;border-radius:10px;grid-template-columns:1fr 1fr;place-items:center;gap:2rem;margin-bottom:1rem;padding:20px 0;display:grid}.app-wechat-qr img{border:3px solid #f0f0f0;border-radius:12px;width:150px;height:150px}.app-wechat-qr .app-qr-tip{color:#666;margin:.5rem 0 0;font-size:14px}.app-wechat-details{text-align:left}.app-detail-item{background:#f8f9fa;border-radius:8px;align-items:center;gap:.8rem;margin-bottom:1rem;padding:10px;display:flex}.app-detail-item .app-detail-label{color:#333;flex-shrink:0;min-width:60px;font-weight:600}.app-detail-item .app-detail-value{color:#555;background:#fff;border:1px solid #e0e0e0;border-radius:4px;flex:1;padding:5px;font-family:monospace}.app-detail-item .app-copy-btn{background:var(--primary-color);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:6px;flex-shrink:0;padding:5px 10px;font-size:12px;transition:all .3s}.app-detail-item .app-copy-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}.app-contact-note{color:#999}.btn{cursor:pointer;border:none;border-radius:6px;align-items:center;gap:.5rem;padding:.5rem 1rem;font-weight:500;text-decoration:none;transition:all .2s;display:inline-flex}.btn.btn-primary{background:var(--primary-color);color:var(--secondary-color)}.btn.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}.btn.btn-secondary{color:var(--primary-color);border:1px solid var(--primary-color);background:0 0}.btn.btn-secondary:hover{background:var(--primary-color);color:var(--secondary-color)}.card-shadow{box-shadow:0 1px 3px #0000001a}.card-shadow:hover{box-shadow:0 4px 12px var(--primary-alpha-10)}.gradient-text{background:linear-gradient(45deg, var(--primary-color), var(--primary-dark));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}@media (width<=768px){.page-section-header{margin-bottom:2rem}.page-section-header .page-section-title{font-size:2rem}.page-section-header .page-section-description{padding:0 1rem;font-size:1rem}.app-contact-modal{max-width:90vw}.app-wechat-section{grid-template-columns:1fr;gap:1rem}.app-wechat-section .app-wechat-qr img{width:100px;height:100px}.app-wechat-details{text-align:center}.app-detail-item{gap:.5rem}.app-detail-item .app-detail-label{text-align:center;min-width:auto}}