*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:Microsoft YaHei,PingFang SC,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:#333;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;position:relative;overflow-x:hidden}.container{max-width:1200px;margin:0 auto;padding:0 20px}.background-animation{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;overflow:hidden}.floating-ball{position:absolute;border-radius:50%;background:linear-gradient(45deg,#ffffff1a,#ffffff4d);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:float 20s infinite linear}.ball-1{width:80px;height:80px;top:10%;left:10%;animation-delay:0s}.ball-2{width:120px;height:120px;top:60%;left:80%;animation-delay:-5s}.ball-3{width:60px;height:60px;top:30%;left:70%;animation-delay:-10s}.ball-4{width:100px;height:100px;top:80%;left:20%;animation-delay:-15s}.ball-5{width:90px;height:90px;top:20%;left:50%;animation-delay:-7s}@keyframes float{0%{transform:translateY(0) rotate(0);opacity:.7}33%{transform:translateY(-30px) rotate(120deg);opacity:1}66%{transform:translateY(30px) rotate(240deg);opacity:.7}to{transform:translateY(0) rotate(360deg);opacity:.7}}.header{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 2px 20px #0000001a;position:fixed;top:0;width:100%;z-index:1000;transition:all .3s ease}.navbar{padding:1rem 0}.nav-container{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:0 20px}.nav-logo h1 a{color:#667eea;text-decoration:none;font-size:1.8rem;font-weight:700;background:linear-gradient(45deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-menu{display:flex;list-style:none;gap:2rem}.nav-item{position:relative}.nav-link{color:#333;text-decoration:none;font-weight:500;transition:color .3s ease;padding:.5rem 1rem;border-radius:25px}.nav-link:hover{color:#667eea;background:#667eea1a}.dropdown{position:relative}.dropdown-menu{position:absolute;top:100%;left:0;background:#fff;box-shadow:0 10px 30px #0000001a;border-radius:10px;padding:1rem 0;min-width:200px;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s ease;z-index:1001}.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-menu li{list-style:none}.dropdown-menu a{display:block;padding:.5rem 1.5rem;color:#333;text-decoration:none;transition:background .3s ease}.dropdown-menu a:hover{background:#667eea1a;color:#667eea}.hamburger{display:none;flex-direction:column;cursor:pointer}.bar{width:25px;height:3px;background:#333;margin:3px 0;transition:.3s;border-radius:2px}.main-content{margin-top:80px;min-height:calc(100vh - 80px)}.hero{background:linear-gradient(#0006,#0006),url(/public/covers/cover_1.jpg);background-size:cover;background-position:center;height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative}.hero-content h2{font-size:3rem;margin-bottom:1rem;text-shadow:2px 2px 4px rgba(0,0,0,.5)}.hero-content p{font-size:1.2rem;margin-bottom:2rem;text-shadow:1px 1px 2px rgba(0,0,0,.5)}.search-box{display:flex;max-width:500px;margin:0 auto;background:#ffffffe6;border-radius:50px;padding:5px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.search-box input{flex:1;border:none;padding:15px 20px;border-radius:50px;font-size:1rem;outline:none;background:transparent;color:#333}.search-box input::-moz-placeholder{color:#666}.search-box input::placeholder{color:#666}.search-box button{background:linear-gradient(45deg,#667eea,#764ba2);color:#fff;border:none;padding:15px 30px;border-radius:50px;cursor:pointer;font-weight:700;transition:transform .3s ease}.search-box button:hover{transform:scale(1.05)}.category-filter{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:2rem 0;margin:2rem 0}.category-filter h3{text-align:center;margin-bottom:1.5rem;color:#333;font-size:1.5rem}.filter-buttons{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.filter-btn{background:transparent;border:2px solid #667eea;color:#667eea;padding:.8rem 1.5rem;border-radius:25px;cursor:pointer;font-weight:500;transition:all .3s ease}.filter-btn:hover,.filter-btn.active{background:#667eea;color:#fff;transform:translateY(-2px);box-shadow:0 5px 15px #667eea4d}.video-grid{padding:3rem 0}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;margin-bottom:3rem}.video-card{background:#fffffff2;border-radius:15px;overflow:hidden;box-shadow:0 10px 30px #0000001a;transition:all .3s ease;cursor:pointer}.video-card:hover{transform:translateY(-10px);box-shadow:0 20px 40px #0003}.video-thumbnail{position:relative;overflow:hidden;height:200px}.video-thumbnail img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;transition:transform .3s ease}.video-card:hover .video-thumbnail img{transform:scale(1.1)}.play-button{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:#667eeae6;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;transition:all .3s ease}.video-card:hover .play-button{background:#667eea;transform:translate(-50%,-50%) scale(1.1)}.video-info{padding:1.5rem}.video-title{font-size:1.1rem;font-weight:700;margin-bottom:.5rem;color:#333;line-height:1.4}.video-description{color:#666;font-size:.9rem;margin-bottom:1rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-meta{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:#888}.video-duration{background:#667eea;color:#fff;padding:.2rem .5rem;border-radius:10px;font-weight:500}.video-categories{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.5rem}.category-tag{background:#667eea1a;color:#667eea;padding:.2rem .5rem;border-radius:10px;font-size:.7rem;font-weight:500}.footer{background:#000000e6;color:#fff;padding:3rem 0 1rem;margin-top:3rem}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;max-width:1200px;margin:0 auto;padding:0 20px}.footer-section h4{color:#667eea;margin-bottom:1rem;font-size:1.1rem}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:.5rem}.footer-section a{color:#ccc;text-decoration:none;transition:color .3s ease}.footer-section a:hover{color:#667eea}.keywords{display:flex;flex-wrap:wrap;gap:.5rem}.keywords a{background:#667eea33;padding:.3rem .8rem;border-radius:15px;font-size:.8rem;transition:all .3s ease}.keywords a:hover{background:#667eea;color:#fff}.footer-bottom{border-top:1px solid #333;margin-top:2rem;padding-top:1rem;text-align:center;color:#888;font-size:.9rem}.footer-bottom a{color:#667eea;text-decoration:none}@media (max-width: 768px){.hamburger{display:flex}.nav-menu{position:fixed;left:-100%;top:70px;flex-direction:column;background-color:#fffffffa;width:100%;text-align:center;transition:.3s;box-shadow:0 10px 27px #0000000d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:2rem 0}.nav-menu.active{left:0}.nav-menu li{margin:1rem 0}.dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:#667eea1a;margin-top:1rem}.hero-content h2{font-size:2rem}.hero-content p{font-size:1rem}.search-box{flex-direction:column;gap:10px;padding:10px}.search-box input,.search-box button{border-radius:25px}.filter-buttons{justify-content:center;gap:.5rem}.filter-btn{padding:.6rem 1rem;font-size:.9rem}.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.footer-content{grid-template-columns:1fr;gap:1.5rem}}@media (max-width: 480px){.hero{height:50vh}.hero-content h2{font-size:1.5rem}.grid{grid-template-columns:1fr}.nav-container,.container{padding:0 15px}}.loading{display:flex;justify-content:center;align-items:center;height:200px}.spinner{width:40px;height:40px;border:4px solid rgba(102,126,234,.3);border-top:4px solid #667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.player-container{max-width:1000px;margin:2rem auto;background:#fffffff2;border-radius:15px;overflow:hidden;box-shadow:0 20px 40px #0000001a}.video-player{width:100%;height:500px;background:#000}.video-player video{width:100%;height:100%}.player-info{padding:2rem}.player-title{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:#333}.player-description{color:#666;line-height:1.6;margin-bottom:1rem}.player-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;flex-wrap:wrap;gap:1rem}.form-container{max-width:400px;margin:3rem auto;background:#fffffff2;padding:2rem;border-radius:15px;box-shadow:0 20px 40px #0000001a}.form-title{text-align:center;margin-bottom:2rem;color:#333;font-size:1.5rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;color:#333;font-weight:500}.form-group input{width:100%;padding:1rem;border:2px solid #ddd;border-radius:10px;font-size:1rem;transition:border-color .3s ease}.form-group input:focus{outline:none;border-color:#667eea}.form-button{width:100%;background:linear-gradient(45deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;transition:transform .3s ease}.form-button:hover{transform:translateY(-2px)}.form-links{text-align:center;margin-top:1rem}.form-links a{color:#667eea;text-decoration:none}.form-links a:hover{text-decoration:underline}.page-content{max-width:800px;margin:2rem auto;background:#fffffff2;padding:3rem;border-radius:15px;box-shadow:0 20px 40px #0000001a;line-height:1.8}.page-content h1{color:#333;margin-bottom:2rem;font-size:2rem;text-align:center}.page-content h2{color:#667eea;margin:2rem 0 1rem;font-size:1.3rem}.page-content h3{color:#333;margin:1.5rem 0 .5rem;font-size:1.1rem}.page-content p{margin-bottom:1rem;color:#666}.page-content ul{margin-bottom:1rem;padding-left:2rem}.page-content li{margin-bottom:.5rem;color:#666}.contact-info{background:#667eea1a;padding:1.5rem;border-radius:10px;margin:1.5rem 0}.contact-info h3{color:#667eea;margin-bottom:1rem}.contact-info p{margin-bottom:.5rem}