:root{--primary-color:#ff2442;--primary-light:#ff5a7d;--primary-dark:#d81e06;--text-color:#333;--text-light:#666;--bg-color:#fff;--bg-light:#f8f8f8;--border-color:#eee;--shadow:0 2px 10px #0000000d}*{box-sizing:border-box;margin:0;padding:0;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif}body{color:var(--text-color);background-color:var(--bg-color);line-height:1.6}a{color:var(--primary-color);text-decoration:none;transition:all .3s}a:hover{color:var(--primary-dark)}.container{max-width:1200px;min-height:60vh;margin:0 auto;padding:20px}header{background-color:var(--bg-color);box-shadow:var(--shadow);z-index:100;position:sticky;top:0}.header-container{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:20px;display:flex}.logo{color:var(--primary-color);align-items:center;font-size:24px;font-weight:700;display:flex}.logo-icon{color:var(--primary-color);margin-right:10px;font-size:28px}nav ul{align-items:center;list-style:none;display:flex}nav li{margin-left:30px}nav a{color:var(--text-color);font-weight:500}nav a:hover{color:var(--primary-color)}.language-switcher{border:1px solid var(--border-color);background:var(--bg-light);cursor:pointer;border-radius:20px;display:flex;overflow:hidden}.language-option{cursor:pointer;padding:6px 12px;font-size:14px;transition:all .3s}.language-option.active{background:var(--primary-color);color:#fff}.mobile-menu{cursor:pointer;font-size:24px;display:none}.hero{text-align:center;background:linear-gradient(135deg,#fff 0%,#fff5f7 100%);padding:80px 0}.hero h1{color:var(--text-color);margin-bottom:20px;font-size:42px}.hero p{color:var(--text-light);max-width:700px;margin:0 auto 40px;font-size:18px}.download{justify-content:center;align-items:center;gap:8px;display:flex}.download:disabled{opacity:.7;cursor:not-allowed}.download-box{background:var(--bg-color);box-shadow:var(--shadow);border-radius:12px;max-width:700px;margin:0 auto;padding:30px}.url-input{gap:0;margin-bottom:20px;display:flex}.url-input input{border:1px solid var(--border-color);border-radius:6px 0 0 6px;outline:none;flex:1;padding:15px;font-size:16px}.url-input input:focus{border-color:var(--primary-color)}.url-input input:disabled{cursor:not-allowed;background-color:#f5f5f5}.url-input button{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:0 6px 6px 0;align-items:center;gap:8px;padding:0 25px;font-size:16px;font-weight:500;transition:background .3s;display:flex}.url-input button:hover{background:var(--primary-dark)}.url-input button:disabled{opacity:.7;cursor:not-allowed}.home-feature{color:var(--text-light);justify-content:space-between;align-items:center;margin:0 15px;font-size:14px;display:flex}.home-feature-icon{color:var(--primary-color);margin-right:8px}.home-section{padding:20px 0;scroll-margin-top:90px}.home-section-title{text-align:center;margin-bottom:50px}.home-section-title h2{margin-bottom:15px;font-size:32px}.home-section-title p{color:var(--text-light);max-width:600px;margin:0 auto}.how-to-steps{flex-wrap:wrap;justify-content:space-between;gap:20px;display:flex}.step{text-align:center;background:var(--bg-light);border-radius:10px;flex:0 0 30%;margin-bottom:30px;padding:30px 20px}.step-number{background:var(--primary-color);color:#fff;border-radius:50%;width:40px;height:40px;margin-bottom:20px;font-weight:700;line-height:40px;display:inline-block}.faq-container{max-width:800px;margin:0 auto}.faq-item{border:1px solid var(--border-color);border-radius:8px;margin-bottom:20px;overflow:hidden}.faq-question{background:var(--bg-light);cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:20px;font-weight:500;display:flex}.faq-question:hover{background-color:#f0f0f0}.faq-answer{max-height:0;padding:0 20px;transition:max-height .3s,padding .3s;overflow:hidden}.faq-item.active .faq-answer{max-height:500px;padding:20px}.blog-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:30px;display:grid}.blog-card{background:var(--bg-color);box-shadow:var(--shadow);border-radius:10px;transition:transform .3s;overflow:hidden}.blog-card:hover{transform:translateY(-5px)}.blog-image{background-color:#f0f0f0;background-position:50%;background-size:cover;height:180px}.blog-content{padding:20px}.blog-content h3{margin-bottom:10px}.blog-meta{color:var(--text-light);justify-content:space-between;margin-bottom:15px;font-size:14px;display:flex}.tools-section{background:var(--bg-light)}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:30px;display:grid}.tool-card{background:var(--bg-color);text-align:center;box-shadow:var(--shadow);border-radius:10px;padding:30px 20px;transition:transform .3s}.tool-card:hover{transform:translateY(-5px)}.tool-card a{color:inherit;text-decoration:none}.tool-card h3{color:var(--text-color);margin:15px 0 10px}.tool-card p{color:var(--text-light)}.tool-icon{color:var(--primary-color);height:40px;margin-bottom:20px;font-size:40px}.tool-icon img{object-fit:contain;width:40px;height:40px}footer{color:#fff;background:#2c2c2c;padding:60px 0 20px}.footer-container{flex-wrap:wrap;justify-content:space-between;max-width:1200px;margin:0 auto;padding:20px;display:flex}.copyright-container{max-width:1200px;margin:0 auto;padding:20px}.footer-column{flex:1;min-width:200px;margin-bottom:40px;padding:0 20px}.footer-column h3{margin-bottom:20px;font-size:18px}.footer-column ul{list-style:none}.footer-column li{margin-bottom:10px}.footer-column a{color:#ccc}.footer-column a:hover{color:#fff}.copyright{text-align:center;color:#aaa;border-top:1px solid #444;padding-top:20px;font-size:14px}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:1rem;height:1rem;animation:1s ease-in-out infinite spin;display:inline-block}.spinner.hidden{display:none}@keyframes spin{to{transform:rotate(360deg)}}.error{color:#c53030;background-color:#fff5f5;border:1px solid #fed7d7;border-radius:.25rem;margin-top:1rem;padding:.75rem;font-size:.875rem;display:none}.page-title{color:var(--primary-color)}.section{margin-bottom:2rem}.section-title{color:var(--primary-color);margin-bottom:1rem;font-size:1.5rem}.section p,.section ol{color:#4a5568;margin-bottom:.5rem;line-height:1.6}.section ol li{margin-left:1rem}.features{padding:0;list-style-type:none}.features li{color:#4a5568;margin-bottom:1rem;padding-left:1.5rem;line-height:1.6;position:relative}.features li:before{content:"✓";color:var(--primary-color);position:absolute;left:0}h3{margin:.5rem 0}.toast{color:#fff;z-index:9999;border-radius:.5rem;max-width:90vw;padding:1rem 1.5rem;font-weight:500;animation:.3s ease-out forwards toast-in;position:fixed;bottom:2rem;right:2rem}.toast.toast-success{background-color:#10b981}.toast.toast-error{background-color:#ef4444}.toast.toast-warning{background-color:#f59e0b}.toast.toast-info{background-color:#3b82f6}@keyframes toast-in{0%{opacity:0;transform:translateY(1.25rem)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.header-container{position:relative}.mobile-menu{display:block;position:absolute;top:50%;right:20px;transform:translateY(-50%)}nav ul{flex-direction:column}.nav-menu{box-shadow:var(--shadow);z-index:99;background:#fff;padding:20px;display:none;position:absolute;top:100%;left:0;right:0}.nav-menu.active{display:block}.nav-menu ul{flex-direction:column}.nav-menu li{margin:10px 0}.hero h1{font-size:32px}.hero p{font-size:16px}.step{flex:0 0 100%;margin-bottom:20px}.how-to-steps{flex-direction:column;gap:0}.url-input{flex-direction:column}.url-input input{border-radius:6px 6px 0 0;margin-bottom:0}.url-input button{border-radius:0 0 6px 6px;justify-content:center;width:100%}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px}.tool-card{padding:20px 10px}.footer-container{flex-direction:column}.footer-column{flex:100%}.toast{bottom:1rem;left:1rem;right:1rem}}@media (max-width:480px){.container{padding:10px}.hero{padding:40px 0}.hero h1,.home-section-title h2{font-size:24px}.download-box{padding:20px}.tools-grid{grid-template-columns:repeat(2,1fr)}}