.hero{background:linear-gradient(135deg, #667eea 0, #764ba2 100%);padding:60px 0 80px;position:relative;overflow:hidden}.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.05)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;background-size:cover;opacity:0.3}.hero-content{text-align:center;color:white;position:relative;z-index:1}.hero-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.hero-badge .badge{background:rgba(255,255,255,0.2);backdrop-filter:blur(10px);padding:6px 16px;border-radius:40px;font-size:0.8rem}.hero h1{font-size:3rem;margin-bottom:20px;font-weight:700}.hero h1 .highlight{position:relative;display:inline-block}.hero h1 .highlight::after{content:'';position:absolute;bottom:0;left:0;right:0;height:12px;background:rgba(255,255,255,0.3);border-radius:6px}.hero p{font-size:1.1rem;margin-bottom:32px;opacity:0.9}.hero-stats{display:flex;justify-content:center;gap:48px}.hero-stats .stat{text-align:center}.hero-stats .stat .num{display:block;font-size:1.8rem;font-weight:700}.hero-stats .stat .label{font-size:0.8rem;opacity:0.8}.quick-nav{display:flex;flex-wrap:wrap;gap:12px;margin:32px 0 24px;padding-bottom:16px;border-bottom:1px solid var(--gray-200);overflow-x:auto}.quick-nav-btn{background:transparent;border:none;padding:8px 10px;font-size:0.9rem;font-weight:500;border-radius:40px;cursor:pointer;transition:all 0.3s;color:var(--gray-600);white-space:nowrap}.quick-nav-btn:hover{background:var(--gray-100);color:var(--gray-800)}.quick-nav-btn.active{background:var(--primary-color);color:white;box-shadow:0 4px 12px rgba(59,130,246,0.3)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(320px, 1fr));gap:24px;margin:32px 0 40px}.tool-card{background:white;border-radius:20px;padding:20px;transition:all 0.3s ease;border:1px solid var(--gray-200);cursor:pointer;display:flex;align-items:center;gap:16px;position:relative;overflow:hidden}.tool-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg, var(--primary-color), var(--primary-light));transform:scaleX(0);transition:transform 0.3s}.tool-card:hover{transform:translateY(-4px);box-shadow:0 20px 30px -12px rgba(0,0,0,0.1);border-color:transparent}.tool-card:hover::before{transform:scaleX(1)}.tool-icon{width:56px;height:56px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--primary-color)}.tool-info{flex:1}.tool-info h4{font-size:1rem;font-weight:600;margin-bottom:6px;color:var(--gray-800)}.tool-info p{font-size:0.75rem;color:var(--gray-500);line-height:1.4}.tool-hot{position:absolute;top:12px;right:12px;background:#fef3c7;color:#92400e;font-size:0.6rem;padding:2px 8px;border-radius:20px}.category-section{margin:40px 0 20px}.category-title{display:flex;align-items:center;gap:12px;font-size:1.4rem;font-weight:600;color:var(--gray-800);margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--gray-200)}.category-title i{color:var(--primary-color);font-size:1.3rem}.category-title span{background:var(--primary-color);color:white;font-size:0.7rem;padding:2px 10px;border-radius:20px}.load-more{text-align:center;margin:40px 0 60px}.load-more-btn{background:var(--gray-100);border:1px solid var(--gray-300);padding:12px 32px;border-radius:40px;cursor:pointer;font-size:0.9rem;transition:all 0.3s}.load-more-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:white}.features{background:var(--gray-50);padding:60px 0;margin-top:40px}.section-title{text-align:center;font-size:2rem;font-weight:700;margin-bottom:48px;color:var(--gray-800)}.section-title span{color:var(--primary-color);position:relative}.section-title span::after{content:'';position:absolute;bottom:-5px;left:0;right:0;height:3px;background:var(--primary-color);border-radius:2px}.features-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:32px}.feature-card{text-align:center;padding:32px 20px;background:white;border-radius:24px;transition:all 0.3s}.feature-card:hover{transform:translateY(-8px);box-shadow:0 20px 30px -12px rgba(0,0,0,0.1)}.feature-icon{width:70px;height:70px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:20px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:30px;color:var(--primary-color)}.feature-card h3{font-size:1.2rem;margin-bottom:12px;color:var(--gray-800)}.feature-card p{font-size:0.85rem;color:var(--gray-500);line-height:1.5}.hot-tools{padding:60px 0}.hot-tools-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));gap:20px}.hot-tool-item{background:white;border-radius:16px;padding:16px 20px;display:flex;align-items:center;gap:14px;border:1px solid var(--gray-200);transition:all 0.3s;cursor:pointer}.hot-tool-item:hover{border-color:var(--primary-color);transform:translateX(4px)}.hot-tool-item .rank{font-size:1.2rem;font-weight:700;color:var(--primary-color);min-width:36px}.hot-tool-item .name{flex:1;font-weight:500}.hot-tool-item .hot{color:#f59e0b;font-size:0.7rem}footer{background:#0f172a;color:#94a3b8;padding:48px 0 24px}.footer-content{display:grid;grid-template-columns:1fr 2fr;gap:48px;margin-bottom:32px}.footer-brand .footer-logo{font-size:1.5rem;font-weight:700;margin-bottom:16px;color:white}.footer-brand p{font-size:0.85rem;margin-bottom:20px}.social-links{display:flex;gap:16px}.social-links a{color:#94a3b8;font-size:1.2rem;transition:color 0.3s}.social-links a:hover{color:var(--primary-color)}.footer-links{display:grid;grid-template-columns:repeat(3, 1fr);gap:32px}.link-group h4{color:white;margin-bottom:16px;font-size:1rem}.link-group a{display:block;color:#94a3b8;font-size:0.85rem;margin-bottom:10px;transition:color 0.3s}.link-group a:hover{color:var(--primary-color)}.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid #1e293b;font-size:0.75rem}.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--primary-color);color:white;border:none;border-radius:50%;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s;box-shadow:0 4px 12px rgba(59,130,246,0.3);z-index:100}.back-to-top.show{opacity:1;visibility:visible}.back-to-top:hover{background:var(--primary-dark);transform:translateY(-3px)}@media (max-width:1024px){.features-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:768px){.hero h1{font-size:2rem}.hero-stats{gap:24px}.hero-stats .stat .num{font-size:1.4rem}.features-grid{grid-template-columns:1fr;gap:20px}.footer-content{grid-template-columns:1fr;gap:32px}.footer-links{grid-template-columns:repeat(2, 1fr)}.quick-nav{gap:8px}.quick-nav-btn{padding:6px 14px;font-size:0.8rem}}@media (max-width:480px){.hero h1{font-size:1.6rem}.hero-badge .badge{font-size:0.7rem}.tools-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr;gap:24px}}