:root{--primary-color:#4361ee;--secondary-color:#3a0ca3;--accent-color:#7209b7;--light-color:#f8f9fa;--dark-color:#212529;--gray-color:#6c757d;--success-color:#4cc9f0;--warning-color:#f72585;--zone-primary:#6366f1;--zone-gradient:linear-gradient(135deg,#818cf8 0%,#4f46e5 100%);--border-radius:12px;--box-shadow:0 8px 24px rgba(0,0,0,0.1);--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI','Microsoft YaHei',sans-serif}body{background-color:#f0f2f5;color:var(--dark-color);line-height:1.6}.container{width:100%;max-width:1000px;margin:0 auto;padding:0 20px}header{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:white;padding:20px 0;box-shadow:0 4px 12px rgba(0,0,0,0.1);position:sticky;top:0;z-index:100}.header-content{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:15px}.logo i{font-size:2.5rem}.logo h1{font-size:1.8rem;font-weight:700}.logo span{color:var(--success-color)}nav ul{display:flex;list-style:none;gap:25px}nav a{color:white;text-decoration:none;font-weight:600;font-size:1.1rem;padding:8px 12px;border-radius:6px;transition:var(--transition)}nav a:hover,nav a.active{background-color:rgba(255,255,255,0.2)}main{padding:40px 0}.section-title{font-size:1.8rem;margin-bottom:25px;color:var(--secondary-color);display:flex;align-items:center;gap:10px}.section-title i{color:var(--accent-color)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin-bottom:40px}.tool-card{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);transition:var(--transition);cursor:pointer;border:2px solid transparent}.tool-card:hover{transform:translateY(-5px);border-color:var(--primary-color)}.tool-card i{font-size:2.5rem;color:var(--primary-color);margin-bottom:15px}.tool-card h3{font-size:1.4rem;margin-bottom:10px;color:var(--dark-color)}.tool-card p{color:var(--gray-color);margin-bottom:20px}.use-tool-btn{background-color:var(--primary-color);color:white;border:none;padding:10px 20px;border-radius:6px;font-weight:600;cursor:pointer;transition:var(--transition);width:100%}.use-tool-btn:hover{background-color:var(--secondary-color)}.tool-detail{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);margin-top:30px;display:none}.tool-detail.active{display:block}.tool-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:15px;border-bottom:2px solid #f0f2f5}.tool-header h2{font-size:1.6rem;color:var(--secondary-color)}.close-tool{background:none;border:none;font-size:1.5rem;color:var(--gray-color);cursor:pointer;transition:var(--transition)}.close-tool:hover{color:var(--warning-color)}.zone-wrapper{max-width:100%}.search-bar{margin-bottom:25px;position:relative}.search-input{width:100%;padding:15px 20px 15px 50px;border:2px solid #e0e7ff;border-radius:10px;font-size:1.1rem;outline:none;transition:var(--transition);box-shadow:0 2px 4px rgba(0,0,0,0.02)}.search-input:focus{border-color:var(--zone-primary);background:white;box-shadow:0 0 0 4px rgba(99,102,241,0.1)}.search-icon{position:absolute;left:20px;top:50%;transform:translateY(-50%);color:#818cf8;font-size:1.2rem}.zone-list{display:flex;flex-direction:column;gap:10px;max-height:600px;overflow-y:auto;padding-right:5px}.zone-list::-webkit-scrollbar{width:6px}.zone-list::-webkit-scrollbar-track{background:#f1f5f9}.zone-list::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}.zone-item{background:white;border:1px solid #e0e7ff;border-radius:10px;padding:15px 20px;display:flex;align-items:center;justify-content:space-between;transition:var(--transition)}.zone-item:hover{border-color:var(--zone-primary);box-shadow:0 4px 12px rgba(99,102,241,0.1);transform:translateX(5px)}.item-left{display:flex;align-items:center;gap:15px;flex:1}.flag-emoji{font-size:2rem;line-height:1;width:40px;text-align:center}.item-info{display:flex;flex-direction:column}.country-name{font-size:1.1rem;font-weight:700;color:var(--secondary-color)}.tz-badge{display:inline-block;background:#e0e7ff;color:#4338ca;font-size:0.8rem;padding:2px 8px;border-radius:4px;margin-top:4px;align-self:flex-start;font-weight:600}.code-btn{background:var(--zone-gradient);color:white;border:none;padding:8px 16px;border-radius:8px;font-family:'Consolas',monospace;font-weight:700;font-size:1rem;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:6px;box-shadow:0 4px 6px rgba(99,102,241,0.2)}.code-btn:hover{filter:brightness(1.1);transform:translateY(-2px)}@media (max-width:600px){.zone-item{flex-direction:column;align-items:flex-start;gap:10px}.code-btn{width:100%;justify-content:center}.item-left{width:100%}}