*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter','Microsoft YaHei',sans-serif;background:#0f172a;color:#e2e8f0;min-height:100vh}
.header{background:#1e293b;border-bottom:1px solid #334155;padding:16px 24px;display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.header .logo{font-size:18px;font-weight:700;color:#818cf8;display:flex;align-items:center;gap:8px}
.header nav{display:flex;gap:6px;flex-wrap:wrap;margin-left:20px}
.header nav a{color:#94a3b8;text-decoration:none;font-size:13px;padding:6px 12px;border-radius:6px;transition:all .2s;cursor:pointer}
.header nav a:hover,.header nav a.active{background:#334155;color:#818cf8}
.main{max-width:1200px;margin:0 auto;padding:30px 20px}
.hero{text-align:center;padding:40px 0 30px}
.hero h1{font-size:28px;font-weight:700;color:#f1f5f9}
.hero p{color:#94a3b8;margin-top:8px;font-size:14px;max-width:600px;margin-left:auto;margin-right:auto}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:16px}
.tool-card{background:#1e293b;border:1px solid #334155;border-radius:12px;overflow:hidden;cursor:pointer;transition:all .2s}
.tool-card:hover{border-color:#818cf8;transform:translateY(-2px);box-shadow:0 8px 25px rgba(129,140,248,.15)}
.tool-card .head{padding:20px 20px 0;display:flex;gap:14px;align-items:flex-start}
.tool-card .icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.tool-card .info{flex:1}
.tool-card .info h3{font-size:15px;font-weight:600;color:#f1f5f9;margin-bottom:4px}
.tool-card .info .scenario{font-size:12px;color:#64748b;margin-bottom:6px;line-height:1.4}
.tool-card .info .desc{font-size:13px;color:#94a3b8;line-height:1.5}
.tool-card .tags{padding:12px 20px 16px;display:flex;gap:6px;flex-wrap:wrap}
.tool-card .tags span{font-size:11px;padding:2px 8px;border-radius:4px;background:#0f172a;color:#64748b}
/* 分类角标 */
.tool-card{position:relative}
.cat-badge{position:absolute;top:10px;right:10px;font-size:10px;color:#64748b;background:#0f172a;border:1px solid #334155;padding:2px 8px;border-radius:10px;white-space:nowrap;max-width:90px;overflow:hidden;text-overflow:ellipsis}
.use-count{font-size:10px;color:#818cf8;margin-left:4px;font-weight:600}
/* 搜索高亮 */
.tool-card.highlight{outline:2px solid #818cf8;outline-offset:-2px;transform:translateY(-1px);box-shadow:0 0 0 4px rgba(129,140,248,.25)}
/* 收藏星标 */
.fav-star{position:absolute;top:8px;left:10px;font-size:16px;cursor:pointer;background:none;border:none;line-height:1;z-index:2;transition:transform .15s;opacity:.55}
.fav-star:hover{transform:scale(1.25);opacity:1}
.fav-star.active{opacity:1;filter:drop-shadow(0 0 4px rgba(251,191,36,.5))}
.backdrop{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.6);z-index:100;justify-content:center;align-items:center;padding:20px}
.backdrop.show{display:flex}
.modal{background:#1e293b;border:1px solid #334155;border-radius:16px;width:100%;max-width:720px;max-height:90vh;overflow-y:auto;padding:28px}
.modal h2{font-size:20px;color:#f1f5f9;margin-bottom:4px;display:flex;align-items:center;gap:8px}
.modal .sub{color:#64748b;font-size:13px;margin-bottom:16px}
.modal .close{float:right;color:#64748b;cursor:pointer;font-size:24px;line-height:1}
.modal .close:hover{color:#ef4444}
.drop-zone{border:2px dashed #475569;border-radius:10px;padding:32px;text-align:center;cursor:pointer;transition:all .2s}
.drop-zone:hover,.drop-zone.dragover{border-color:#818cf8;background:rgba(129,140,248,.05)}
.drop-zone.has-file{border-color:#22c55e}
.btn{padding:10px 24px;border-radius:8px;border:none;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px}
.btn-primary{background:#818cf8;color:#fff}
.btn-primary:hover{background:#6366f1}
.btn-primary:disabled{opacity:.5;cursor:not-allowed}
.btn-success{background:#22c55e;color:#fff}
.btn-success:hover{background:#16a34a}
.btn-danger{background:#ef4444;color:#fff}
.btn-danger:hover{background:#dc2626}
.btn-sm{padding:6px 14px;font-size:12px}
.flex-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:16px;justify-content:flex-end}
.file-item{display:flex;align-items:center;justify-content:space-between;background:#0f172a;border:1px solid #334155;border-radius:8px;padding:10px 14px;margin-top:8px}
.file-item .name{font-size:13px;color:#e2e8f0;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-item .size{font-size:11px;color:#64748b;margin-top:2px}
.file-item .del{cursor:pointer;color:#ef4444;font-size:18px;line-height:1;padding:0 4px}
.file-item .del:hover{color:#ff6b6b}
.sort-btn{background:#334155;border:none;color:#94a3b8;width:26px;height:26px;border-radius:5px;cursor:pointer;font-size:13px;line-height:1;transition:all .2s}
.sort-btn:hover:not(:disabled){background:#818cf8;color:#fff}
.sort-btn:disabled{opacity:.35;cursor:not-allowed}
.option-group{margin-top:16px}
.option-group label{display:block;font-size:12px;color:#94a3b8;margin-bottom:4px;font-weight:500}
.option-group input[type="text"],.option-group input[type="number"],.option-group input[type="password"]{width:100%;padding:8px 12px;border-radius:6px;border:1px solid #334155;background:#0f172a;color:#e2e8f0;font-size:13px;outline:none;transition:border .2s}
.option-group select{width:100%;padding:8px 12px;border-radius:6px;border:1px solid #334155;background:#0f172a;color:#e2e8f0;font-size:13px;outline:none}
.option-group input[type="checkbox"],.option-group input[type="radio"]{accent-color:#818cf8}
.option-group input:focus{border-color:#818cf8}
.option-group input[type="range"]{width:100%;accent-color:#818cf8;margin-top:4px}
.slider-val{display:flex;justify-content:space-between;font-size:11px;color:#64748b;margin-top:2px}
.tab-bar{display:flex;gap:4px;margin-top:12px}
.tab-bar button{padding:6px 16px;border-radius:6px;border:1px solid #334155;background:transparent;color:#94a3b8;cursor:pointer;font-size:12px;transition:all .2s}
.tab-bar button.active{background:#818cf8;color:#fff;border-color:#818cf8}
.result-box{display:none;margin-top:16px;padding:16px;background:#0f172a;border:1px solid #334155;border-radius:10px}
.result-box.show{display:block}
.result-box .row{display:flex;justify-content:space-between;align-items:center;padding:6px 0;border-bottom:1px solid #1e293b;font-size:13px}
.preview-box{background:#0f172a;border:1px solid #334155;border-radius:8px;padding:12px;margin-top:12px}
.img-output{max-width:100%;border-radius:6px;margin-top:8px}
.loading{text-align:center;padding:40px}
.spinner{width:36px;height:36px;border:3px solid #334155;border-top-color:#818cf8;border-radius:50%;animation:spin .8s linear infinite;margin:0 auto}
@keyframes spin{to{transform:rotate(360deg)}}
.ad-slot{position:relative;margin:20px 0;border:1px dashed #475569;border-radius:10px;background:#16213a;overflow:hidden}
.ad-slot .ad-tag{position:absolute;top:6px;right:8px;font-size:10px;color:#64748b;background:#0f172a;padding:1px 6px;border-radius:4px;z-index:1}
.ad-slot .ad-inner{min-height:100px;display:flex;align-items:center;justify-content:center;color:#64748b;font-size:12px}
.ad-slot.ad-footer{margin-top:30px}
.ad-slot.ad-footer .ad-inner{min-height:80px}
.ad-slot.ad-modal{margin-top:16px}
.ad-slot.ad-modal .ad-inner{min-height:70px}
.ad-slot:hover{border-color:#818cf8}

/* ===== 进度条 ===== */
.progress-bar{width:100%;height:6px;background:#1e293b;border-radius:3px;overflow:hidden;margin:12px 0}
.progress-bar .fill{height:100%;background:linear-gradient(90deg,#818cf8,#6366f1);border-radius:3px;transition:width .3s ease;width:0%}
.progress-text{text-align:center;font-size:12px;color:#94a3b8;margin-top:4px}
.progress-info{display:flex;justify-content:space-between;font-size:11px;color:#64748b;margin-top:2px}
.progress-info .label{color:#94a3b8}
.progress-info .value{color:#818cf8;font-weight:500}

/* ===== 提示信息 ===== */
.alert{padding:10px 14px;border-radius:8px;font-size:12px;margin:12px 0;display:flex;align-items:flex-start;gap:8px;line-height:1.5}
.alert-warning{background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.3);color:#fbbf24}
.alert-info{background:rgba(96,165,250,.1);border:1px solid rgba(96,165,250,.3);color:#93c5fd}
.alert-success{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#4ade80}
.alert-error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:#f87171}
.alert .icon{flex-shrink:0;font-size:16px;line-height:1.4}

/* ===== 文件大小提示 ===== */
.size-badge{display:inline-block;padding:1px 8px;border-radius:4px;font-size:10px;font-weight:500;margin-left:6px}
.size-badge.sm{background:#166534;color:#4ade80}
.size-badge.md{background:#92400e;color:#fbbf24}
.size-badge.lg{background:#7f1d1d;color:#f87171}
.size-limit-note{font-size:11px;color:#64748b;text-align:center;margin-top:6px;padding:4px;background:#0f172a;border-radius:6px}

/* ===== 搜索框 ===== */
.search-wrap{max-width:560px;margin:0 auto 24px;position:relative}
.search-wrap .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:16px;opacity:.6}
.search-wrap input[type="search"]{width:100%;padding:12px 16px 12px 42px;border-radius:12px;border:1px solid #334155;background:#1e293b;color:#e2e8f0;font-size:14px;outline:none;transition:border .2s,box-shadow .2s}
.search-wrap input[type="search"]:focus{border-color:#818cf8;box-shadow:0 0 0 3px rgba(129,140,248,.15)}
.search-wrap input[type="search"]::placeholder{color:#64748b}
.search-wrap .search-count{position:absolute;right:14px;top:50%;transform:translateY(-50%);font-size:11px;color:#64748b;background:#0f172a;padding:2px 8px;border-radius:10px}
.search-empty{display:none;text-align:center;padding:40px;color:#64748b;font-size:14px;grid-column:1/-1}
.search-empty .emoji{font-size:40px;margin-bottom:8px;display:block}

/* ===== 分类导航条 ===== */
.cat-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:0 auto 20px;max-width:900px}
.cat-nav button{background:#1e293b;border:1px solid #334155;color:#94a3b8;font-size:12px;padding:6px 14px;border-radius:20px;cursor:pointer;transition:all .2s}
.cat-nav button:hover{background:#334155;color:#818cf8;border-color:#818cf8}
@media (max-width:480px){
  .cat-nav{gap:6px}
  .cat-nav button{font-size:11px;padding:5px 10px}
}

/* ===== 统计信息栏 ===== */
.stats-bar{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:0 auto 24px;max-width:720px}
.stat-item{display:flex;flex-direction:column;align-items:center;background:#1e293b;border:1px solid #334155;border-radius:12px;padding:10px 22px;min-width:96px}
.stat-item .stat-num{font-size:22px;font-weight:700;color:#818cf8}
.stat-item .stat-label{font-size:11px;color:#64748b;margin-top:2px}
.stat-item.security{flex-direction:row;gap:6px;align-items:center;background:rgba(34,197,94,.08);border-color:rgba(34,197,94,.3)}
.stat-item.security .stat-num{font-size:16px}
@media (max-width:480px){
  .stat-item{padding:8px 14px;min-width:72px}
  .stat-item .stat-num{font-size:18px}
}

/* ===== 返回顶部按钮 ===== */
.back-to-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;background:#818cf8;color:#fff;border:none;font-size:20px;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(129,140,248,.4);z-index:90;transition:all .2s}
.back-to-top:hover{background:#6366f1;transform:translateY(-2px)}
.back-to-top.show{display:flex}
@media (max-width:480px){
  .back-to-top{right:14px;bottom:14px;width:38px;height:38px;font-size:17px}
}

/* ===== 相关工具推荐 ===== */
.related-tools{margin-top:20px;padding-top:14px;border-top:1px solid #334155}
.related-title{font-size:12px;color:#64748b;margin-bottom:8px}
.related-list{display:flex;gap:8px;flex-wrap:wrap}
.related-list button{background:#0f172a;border:1px solid #334155;color:#94a3b8;font-size:12px;padding:6px 12px;border-radius:8px;cursor:pointer;transition:all .2s}
.related-list button:hover{border-color:#818cf8;color:#818cf8}

/* ===== 页脚 ===== */
.site-footer{margin-top:40px;border-top:1px solid #1e293b;background:#16213a;padding:28px 20px;text-align:center}
.site-footer .footer-logo{font-size:15px;font-weight:700;color:#818cf8;margin-bottom:8px}
.site-footer p{font-size:12px;color:#64748b;line-height:1.8;max-width:700px;margin:0 auto}
.site-footer .footer-links{margin-top:6px;color:#94a3b8}
.site-footer .footer-copy{margin-top:10px;font-size:11px;color:#475569}
.site-footer a{color:#64748b;text-decoration:none}
.site-footer a:hover{color:#818cf8}

/* ===== 移动端适配 ===== */
@media (max-width: 768px){
  .header{padding:12px 16px;gap:8px}
  .header .logo{font-size:16px}
  .header nav{margin-left:0;width:100%;order:3;margin-top:4px}
  .header nav a{font-size:12px;padding:4px 10px}
  .main{padding:16px 12px}
  .hero{padding:24px 0 20px}
  .hero h1{font-size:22px}
  .hero p{font-size:13px}
  .tool-grid{grid-template-columns:1fr;gap:12px}
  .tool-card .head{padding:16px 16px 0;gap:10px}
  .tool-card .icon{width:36px;height:36px;font-size:18px}
  .tool-card .info h3{font-size:14px}
  .tool-card .info .scenario{font-size:11px}
  .tool-card .info .desc{font-size:12px}
  .tool-card .tags{padding:10px 16px 14px}
  .tool-card .tags span{font-size:10px}
  .modal{padding:16px;max-width:100%;border-radius:12px;margin:0}
  .modal h2{font-size:17px}
  .modal .sub{font-size:12px}
  .backdrop{padding:10px;align-items:flex-start;padding-top:20px}
  .drop-zone{padding:20px 16px}
  .file-item .name{max-width:200px}
  .tab-bar{flex-wrap:wrap}
  .tab-bar button{flex:1;min-width:60px;text-align:center;padding:6px 8px;font-size:11px}
  .option-group input[type="text"],.option-group input[type="number"],.option-group input[type="password"]{font-size:16px} /* 防止iOS缩放 */
}
@media (max-width: 480px){
  .hero h1{font-size:18px}
  .file-item .name{max-width:140px}
  .modal .close{font-size:28px;padding:4px}
  .btn{padding:8px 16px;font-size:13px}
  .btn-sm{padding:5px 10px;font-size:11px}
  .result-box .row{flex-wrap:wrap;gap:6px}
}

/* ===== Toast 轻提示 ===== */
.toast-wrap{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;max-width:92vw}
.toast{pointer-events:auto;background:#1e293b;border:1px solid #475569;border-left:3px solid #fbbf24;color:#e2e8f0;font-size:13px;line-height:1.5;padding:10px 16px;border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.35);max-width:80vw;word-break:break-word;cursor:pointer;animation:toastIn .22s ease}
.toast.t-error{border-left-color:#ef4444}
.toast.t-success{border-left-color:#22c55e}
.toast.t-info{border-left-color:#60a5fa}
.toast.hide{opacity:0;transform:translateY(-8px);transition:all .25s}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}

/* ===== 浅色主题 ===== */
body.theme-light{background:#f1f5f9;color:#1e293b}
body.theme-light .header{background:#ffffff;border-bottom-color:#e2e8f0}
body.theme-light .header .logo{color:#6366f1}
body.theme-light .header nav a{color:#64748b}
body.theme-light .header nav a:hover,body.theme-light .header nav a.active{background:#eef2ff;color:#6366f1}
body.theme-light .hero h1{color:#1e293b}
body.theme-light .hero p{color:#64748b}
body.theme-light .tool-card{background:#ffffff;border-color:#e2e8f0}
body.theme-light .tool-card:hover{border-color:#818cf8;box-shadow:0 8px 25px rgba(99,102,241,.12)}
body.theme-light .tool-card .info h3{color:#1e293b}
body.theme-light .tool-card .info .scenario{color:#94a3b8}
body.theme-light .tool-card .info .desc{color:#475569}
body.theme-light .tool-card .tags span{background:#f1f5f9;color:#64748b}
body.theme-light .modal{background:#ffffff;border-color:#e2e8f0}
body.theme-light .modal h2{color:#1e293b}
body.theme-light .drop-zone{border-color:#cbd5e1}
body.theme-light .drop-zone:hover,body.theme-light .drop-zone.dragover{border-color:#818cf8;background:rgba(99,102,241,.05)}
body.theme-light .file-item{background:#f8fafc;border-color:#e2e8f0}
body.theme-light .file-item .name{color:#1e293b}
body.theme-light .option-group label{color:#64748b}
body.theme-light .option-group input[type="text"],body.theme-light .option-group input[type="number"],body.theme-light .option-group input[type="password"],body.theme-light .option-group select{background:#f8fafc;border-color:#e2e8f0;color:#1e293b}
body.theme-light .tab-bar button{border-color:#e2e8f0;color:#64748b}
body.theme-light .tab-bar button.active{background:#818cf8;border-color:#818cf8;color:#fff}
body.theme-light .result-box{background:#f8fafc;border-color:#e2e8f0}
body.theme-light .result-box .row{border-bottom-color:#e2e8f0}
body.theme-light .preview-box{background:#f8fafc;border-color:#e2e8f0}
body.theme-light .slider-val{color:#94a3b8}
body.theme-light .size-limit-note{background:#f8fafc;color:#64748b}
body.theme-light .alert-info{background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.25);color:#1d4ed8}
body.theme-light .alert-warning{background:rgba(245,158,11,.1);border-color:rgba(245,158,11,.3);color:#b45309}
body.theme-light .alert-error{background:rgba(239,68,68,.08);border-color:rgba(239,68,68,.25);color:#dc2626}
body.theme-light .cat-nav button{background:#ffffff;border-color:#e2e8f0;color:#64748b}
body.theme-light .cat-nav button:hover{border-color:#818cf8;color:#6366f1}
body.theme-light .stat-item{background:#ffffff;border-color:#e2e8f0}
body.theme-light .stat-item.security{background:rgba(34,197,94,.08);border-color:rgba(34,197,94,.25)}
body.theme-light .search-wrap input[type="search"]{background:#ffffff;border-color:#e2e8f0;color:#1e293b}
body.theme-light .search-wrap input[type="search"]:focus{border-color:#818cf8;box-shadow:0 0 0 3px rgba(99,102,241,.15)}
body.theme-light .site-footer{background:#e8edf3;border-top-color:#e2e8f0}
body.theme-light .site-footer p{color:#64748b}
body.theme-light .site-footer .footer-links{color:#475569}
body.theme-light .site-footer .footer-copy{color:#94a3b8}
body.theme-light .ad-slot{background:#f8fafc;border-color:#e2e8f0}
body.theme-light .loading p{color:#64748b}
body.theme-light .spinner{border-color:#e2e8f0;border-top-color:#818cf8}
body.theme-light .back-to-top{background:#6366f1}
body.theme-light .related-list button{background:#f8fafc;border-color:#e2e8f0;color:#64748b}
body.theme-light .progress-info .label{color:#64748b}
body.theme-light .progress-info .value{color:#6366f1}
body.theme-light .toast{background:#ffffff;border-color:#e2e8f0;color:#1e293b;box-shadow:0 8px 24px rgba(15,23,42,.15)}