:root{--brand-blue: #1A6DF5;--brand-blue-light: #E8F1FE;--brand-blue-dark: #1558C8;--brand-purple: #8B5CF6;--brand-orange: #F59E0B;--bg-page: #F5F7FA;--bg-card: #FFFFFF;--text-primary: #1A1A2E;--text-secondary: #6B7280;--text-hint: #9CA3AF;--border-color: #E8ECF1}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-page);color:var(--text-primary);min-height:100vh}.top-bar{height:56px;background:#fff;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:100;box-shadow:0 1px 3px #0000000a}.top-bar-left{display:flex;align-items:center;gap:12px;font-weight:700;font-size:18px;color:var(--brand-blue);cursor:pointer}.top-bar-logo{width:32px;height:32px;background:linear-gradient(135deg,#1a6df5,#8b5cf6);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:700}.top-bar-right{display:flex;align-items:center;gap:20px}.credit-badge{display:flex;align-items:center;gap:6px;background:linear-gradient(135deg,#fff7e6,#fff1cc);border:1px solid #F5A623;border-radius:20px;padding:4px 14px;font-size:14px;font-weight:600;color:#d48806}.credit-badge .anticon{font-size:16px}.nav-links{display:flex;gap:4px}.nav-link{padding:8px 18px;border-radius:8px;font-size:14px;color:var(--text-secondary);cursor:pointer;transition:all .2s;text-decoration:none;font-weight:500}.nav-link:hover{background:var(--bg-page);color:var(--text-primary)}.nav-link.active{background:var(--brand-blue-light);color:var(--brand-blue);font-weight:600}.page-container{max-width:1200px;margin:0 auto;padding:32px 24px}.cat-tag{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:12px;font-size:12px;font-weight:500}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.tool-card{background:#fff;border-radius:16px;padding:20px;cursor:pointer;border:1px solid var(--border-color);transition:all .2s}.tool-card:hover{box-shadow:0 8px 24px #00000014;transform:translateY(-2px);border-color:var(--brand-blue)}.tool-card-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}.tool-card-name{font-size:15px;font-weight:600;margin-bottom:4px}.tool-card-desc{font-size:13px;color:var(--text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.tool-card-credits{font-size:12px;color:var(--text-hint);margin-top:8px}.tool-workspace{display:grid;grid-template-columns:380px 1fr;gap:20px;min-height:calc(100vh - 140px)}.tool-input-panel{background:#fff;border-radius:16px;padding:24px;border:1px solid var(--border-color)}.tool-output-panel{background:#fff;border-radius:16px;padding:24px;border:1px solid var(--border-color);min-height:400px;overflow-y:auto}.tool-output-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-color)}.category-banner{border-radius:16px;padding:28px 32px;color:#fff;margin-bottom:24px;display:flex;align-items:center;gap:16px}.category-banner-icon{font-size:40px}.category-banner-info h2{font-size:24px;font-weight:700}.category-banner-info p{font-size:14px;opacity:.85;margin-top:4px}@media(max-width:768px){.top-bar{padding:0 16px}.page-container{padding:16px}.tool-workspace{grid-template-columns:1fr}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}.nav-links{display:none}}.search-box{max-width:480px;margin:0 auto 28px}.hero-banner{background:linear-gradient(135deg,#1a6df5,#8b5cf6,#ec4899);border-radius:20px;padding:40px 48px;color:#fff;margin-bottom:32px;text-align:center}.hero-banner h1{font-size:32px;font-weight:800;margin-bottom:8px}.hero-banner p{font-size:16px;opacity:.9}.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px;margin-bottom:32px}.cat-card{background:#fff;border-radius:16px;padding:20px;text-align:center;cursor:pointer;border:1px solid var(--border-color);transition:all .2s}.cat-card:hover{box-shadow:0 6px 20px #0000000f;transform:translateY(-2px)}.cat-card-icon{width:52px;height:52px;border-radius:14px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:26px}.cat-card-name{font-size:15px;font-weight:600}.cat-card-count{font-size:12px;color:var(--text-hint);margin-top:4px}.profile-header{background:linear-gradient(135deg,#1a6df5,#8b5cf6);border-radius:20px;padding:32px 36px;color:#fff;margin-bottom:24px}.profile-info{display:flex;align-items:center;gap:16px}.profile-avatar{width:64px;height:64px;background:#fff3;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;color:#fff}.profile-credits{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.credit-stat{background:#ffffff26;border-radius:12px;padding:14px;text-align:center}.credit-stat .num{font-size:28px;font-weight:800}.credit-stat .label{font-size:13px;opacity:.8;margin-top:2px}.history-list{display:flex;flex-direction:column;gap:12px}.history-item{background:#fff;border-radius:12px;padding:16px 20px;border:1px solid var(--border-color)}.history-item .tool-name{font-weight:600;font-size:14px;color:var(--brand-blue)}.history-item .input-preview{font-size:13px;color:var(--text-secondary);margin-top:4px}.history-item .time{font-size:12px;color:var(--text-hint);margin-top:6px}