:root{--bg:#f5f5f7;--card:#fff;--border:#e5e5ea;--text:#1d1d1f;--muted:#86868b;--accent:#0071e3;--accent-hover:#0077ed;--accent-bg:#f0f5ff;--green:#34c759;--red:#ff3b30}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;-webkit-font-smoothing:antialiased}
.sidebar{width:220px;background:rgba(255,255,255,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-right:1px solid var(--border);padding:1.5rem 0;position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:100}
.sidebar-logo{padding:0 1.25rem 1.5rem;border-bottom:1px solid var(--border);margin-bottom:.25rem}
.sidebar-logo h2{font-size:1rem;font-weight:600;display:flex;align-items:center;gap:.5rem;letter-spacing:-.01em}
.sidebar-logo .dot{width:7px;height:7px;background:var(--green);border-radius:50%;box-shadow:0 0 0 3px rgba(52,199,89,.2)}
.nav-item{display:flex;align-items:center;gap:.65rem;padding:.6rem 1.25rem;margin:0 .5rem;color:var(--muted);cursor:pointer;font-size:.875rem;border-radius:8px;transition:all .12s;font-weight:450}
.nav-item:hover{color:var(--text);background:rgba(0,0,0,.04)}
.nav-item.active{color:var(--accent);background:var(--accent-bg);font-weight:500}
.nav-section{padding:.75rem 1.25rem .2rem;font-size:.65rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
.model-mini{padding:.75rem 1.25rem}
.model-mini select{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--border);padding:.45rem .6rem;border-radius:6px;font-size:.8rem;cursor:pointer;outline:none}
.model-mini select:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(0,113,227,.15)}
.main{margin-left:220px;flex:1}
.header{background:rgba(255,255,255,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:.9rem 2rem;position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between}
.header h1{font-size:1.15rem;font-weight:600;letter-spacing:-.01em}
.header span.sub{font-size:.8rem;color:var(--muted)}
.content{padding:2rem 2.5rem;max-width:1400px}
.page{display:none;animation:fadeIn .25s}
.page.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin-bottom:2rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.5rem;transition:box-shadow .2s}
.card:hover{box-shadow:0 2px 12px rgba(0,0,0,.06)}
.card h3{font-size:.95rem;font-weight:600;margin-bottom:.6rem;letter-spacing:-.01em}
.card p,.card li{color:var(--muted);font-size:.85rem;line-height:1.6}
.card ul{list-style:none;padding:0}
.card ul li::before{content:'— ';color:var(--border)}
.upload-zone{border:2px dashed var(--border);border-radius:14px;padding:2.5rem;text-align:center;cursor:pointer;transition:all .2s;background:var(--card)}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent);background:var(--accent-bg)}
.upload-zone input{display:none}
.upload-zone .upload-icon{font-size:2.2rem;margin-bottom:.4rem}
.upload-zone h3{font-size:1rem;font-weight:500;margin-bottom:.25rem}
.upload-zone p{color:var(--muted);font-size:.85rem}
.upload-zone span{color:var(--accent);font-weight:500}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1.25rem;border-radius:8px;font-size:.85rem;cursor:pointer;border:none;font-weight:500;transition:all .15s;letter-spacing:-.01em}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);box-shadow:0 2px 8px rgba(0,113,227,.25)}
.btn-outline{background:var(--card);border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:var(--bg)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.form-row{display:flex;gap:1rem;margin:1rem 0}
.form-group{flex:1;min-width:120px}
.form-group label{display:block;color:var(--muted);font-size:.8rem;margin-bottom:.3rem;font-weight:500}
.form-group input,.form-group select{width:100%;background:var(--card);border:1px solid var(--border);padding:.5rem .65rem;border-radius:6px;font-size:.85rem;outline:none}
.form-group input:focus,.form-group select:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(0,113,227,.1)}
.result-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:2rem;margin-top:1.25rem;text-align:center;animation:fadeIn .25s}
.result-main{font-size:4.5rem;font-weight:700;color:var(--accent);letter-spacing:-.02em;line-height:1}
.result-conf{color:var(--muted);font-size:.9rem;margin:.4rem 0 1rem}
.topk-grid{display:flex;gap:.4rem;justify-content:center;flex-wrap:wrap}
.topk-item{padding:.5rem .85rem;background:var(--accent-bg);border-radius:8px;min-width:65px;text-align:center}
.topk-item:first-child{background:#e8f8ed}
.topk-char{font-size:1.2rem;font-weight:600;color:var(--text)}
.topk-conf{font-size:.7rem;color:var(--muted);margin-top:.1rem}
.word-result{font-size:2.2rem;letter-spacing:0.4rem;font-weight:600;color:var(--accent);word-wrap:break-word;overflow-wrap:break-word}
.word-chars{display:flex;gap:3px;justify-content:center;flex-wrap:wrap;margin-top:.6rem;max-width:100%;overflow:hidden}
.word-char{padding:.25rem .5rem;background:var(--bg);border:1px solid var(--border);border-radius:4px;font-size:.8rem}
.word-char span{display:block;font-size:.6rem;color:var(--muted)}
.word-frame-sep{width:12px;flex-shrink:0}
.preview-img{max-width:220px;max-height:220px;border-radius:10px;border:1px solid var(--border);display:block;margin:1rem auto}
.compare-table{width:100%;border-collapse:collapse;margin:.5rem 0}
.compare-table th,.compare-table td{padding:.6rem .85rem;text-align:left;border-bottom:1px solid var(--border);font-size:.85rem}
.compare-table th{color:var(--muted);font-weight:500;font-size:.75rem;text-transform:uppercase;letter-spacing:.04em}
.compare-table tr:hover{background:var(--accent-bg)}
.info-box{background:var(--accent-bg);border-radius:10px;padding:.85rem 1.25rem;margin:.75rem 0;color:var(--accent);font-size:.85rem;line-height:1.5}
.code-block{background:#f5f5f7;border:1px solid var(--border);border-radius:10px;padding:1rem 1.25rem;font-family:'SF Mono','JetBrains Mono',monospace;font-size:.8rem;color:var(--text);overflow-x:auto;margin:.75rem 0;line-height:1.5}
/* Lightbox */
.lightbox{display:none;position:fixed;z-index:9999;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,.85);cursor:pointer;animation:fadeIn .2s}
.lightbox.show{display:flex;align-items:center;justify-content:center}
.lightbox img{max-width:92vw;max-height:92vh;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,.5);cursor:default}
.lightbox-close{position:fixed;top:20px;right:28px;color:#fff;font-size:36px;cursor:pointer;z-index:10000;line-height:1;opacity:.7;transition:opacity .15s}
.lightbox-close:hover{opacity:1}
.chart-img{cursor:zoom-in}
.camera-area{position:relative;border-radius:12px;overflow:hidden;background:#000;max-height:380px}.camera-area video{width:100%;display:block}
.cam-guide{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:10}
.cam-guide-box{position:absolute;top:12%;left:8%;width:84%;height:76%;border:2px dashed rgba(255,255,255,.6);border-radius:12px;box-shadow:0 0 0 9999px rgba(0,0,0,.35)}
.cam-guide-text{position:absolute;bottom:10%;width:100%;text-align:center;color:#fff;font-size:.95rem;font-weight:500;text-shadow:0 1px 4px rgba(0,0,0,.5);letter-spacing:.04em}
.status{position:fixed;bottom:0;left:220px;right:0;padding:.5rem 2rem;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-top:1px solid var(--border);font-size:.75rem;color:var(--muted);text-align:center;z-index:50}
.status .dot{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:.4rem;vertical-align:middle}
.status .dot.online{background:var(--green)}.status .dot.offline{background:var(--red)}
@media(max-width:768px){
  .hamburger-text { display: block; font-size: 8px; color: var(--muted); margin-top: 1px; line-height: 1; white-space: nowrap; }
  .sidebar{display:none}
  .main{margin-left:0}
  .cards{grid-template-columns:1fr}
  .content{padding:1rem}
  .header{padding:.75rem 1rem}
  .status{left:0}
}

/* ICP备案号 */
.icp-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: 10px 0;
    background: #fff;
    border-top: 1px solid #eee;
    font-size: 12px;
    color: #999;
    z-index: 100;
}
.icp-footer a {
    color: #999;
    text-decoration: none;
}
.icp-footer a:hover {
    color: #666;
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
    position: fixed; top: 12px; left: 12px; z-index: 200;
    width: 36px; height: 36px;
    flex-direction: column; justify-content: center; gap: 5px;
    background: rgba(255,255,255,.9); border: 1px solid var(--border);
    border-radius: 8px; padding: 8px 7px; cursor: pointer;
    backdrop-filter: blur(10px);
  }
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .mobile-nav-overlay {
    display: none;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.4); z-index: 250;
  }
  .mobile-nav-overlay.show { display: block; }
  .mobile-nav {
    position: fixed; top: 0; left: -280px; bottom: 0;
    width: 260px; background: #fff; z-index: 300;
    overflow-y: auto; transition: left .25s;
    box-shadow: 2px 0 12px rgba(0,0,0,.1);
    padding: 0 0 1rem 0;
  }
  .mobile-nav.show { left: 0; }
  .mobile-nav-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.25rem; border-bottom: 1px solid var(--border);
    margin-bottom: .5rem;
  }
  .mobile-nav-header h2 {
    font-size: .95rem; font-weight: 600; display: flex; align-items: center; gap: .5rem;
  }
  .mobile-nav-header .dot {
    width: 7px; height: 7px; background: var(--green);
    border-radius: 50%; box-shadow: 0 0 0 3px rgba(52,199,89,.2);
  }
  .mobile-nav-close {
    background: none; border: none; font-size: 1.5rem;
    color: var(--muted); cursor: pointer; padding: 0 .25rem; line-height: 1;
  }
  .mobile-nav-section {
    padding: .75rem 1.25rem .2rem; font-size: .65rem;
    text-transform: uppercase; letter-spacing: .08em;
    color: var(--muted); font-weight: 600;
  }
  .mobile-nav-item {
    display: flex; align-items: center; gap: .65rem;
    padding: .7rem 1.25rem; margin: 0 .5rem;
    color: var(--muted); cursor: pointer; font-size: .9rem;
    border-radius: 8px; transition: all .12s; font-weight: 450;
  }
  .mobile-nav-item.active {
    color: var(--accent); background: var(--accent-bg); font-weight: 500;
  }
  .header { padding: .75rem 1rem .75rem 3.5rem; }
  .header h1 { font-size: 1rem; }
  .content { padding: 1rem; }
  .cards { grid-template-columns: 1fr; gap: .75rem; }
  .card { padding: 1rem; }
  .form-row { flex-direction: column; gap: .5rem; }
  .form-group { min-width: 0; }
  .btn { padding: .6rem 1rem; font-size: .9rem; width: 100%; justify-content: center; }
  .upload-zone { padding: 1.5rem 1rem; }
  .preview-img { max-width: 100%; max-height: 180px; }
  .result-card { padding: 1.25rem; }
  .result-main { font-size: 3rem; }
  .camera-area { max-height: 280px; }
  .cam-guide-text { font-size: .8rem; }
  .compare-table { font-size: .75rem; }
  .compare-table th, .compare-table td { padding: .4rem .5rem; }
  .code-block { font-size: .7rem; padding: .75rem; }
  .status { left: 0; padding: .4rem 1rem; font-size: .7rem; }
  .chart-img { max-width: 100%; height: auto; }
  .word-result { font-size: 1.5rem; letter-spacing: .2rem; }
  .word-char { font-size: .7rem; padding: .2rem .35rem; }
  .header .btn { width: auto; padding: .4rem .75rem; font-size: .8rem; }
  .icp-footer { font-size: 10px; padding: 8px 0; z-index: 50; }
  .model-mini { display: none; }
}
@media (min-width: 769px) {
  .hamburger { display: none; }
  .mobile-nav, .mobile-nav-overlay { display: none !important; }
}
@media (max-width: 400px) {
  .header h1 { font-size: .9rem; }
  .content { padding: .75rem; }
  .result-main { font-size: 2.5rem; }
  .topk-item { padding: .35rem .5rem; min-width: 50px; }
  .topk-char { font-size: 1rem; }
}

/* 汉堡菜单按钮美化 */

/* 移动端模型选择框 */
.mobile-model-wrap select {
  width: 100% !important;
  max-width: 100% !important;
  box-sizing: border-box !important;
  padding: .55rem 2rem .55rem .6rem !important;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; font-size: .85rem; color: var(--text);
  -webkit-appearance: none; appearance: none;
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M3 5l3 3 3-3' fill='none' stroke='%23868b' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat; background-position: right .6rem center;
}