:root{
  --bg:#f0f2f5;
  --surface:#ffffff;
  --surface2:#f5f7fa;
  --line:#e4e7ed;
  --text:#303133;
  --muted:#909399;
  --faint:#C0C4CC;
  --accent:#409EFF;
  --accent-dim:rgba(64,158,255,.12);
  --amber:#E6A23C;
  --blue:#409EFF;
  --font-display:'Bahnschrift','DIN Alternate','Arial Narrow',sans-serif;
  --font-mono:'Consolas','Cascadia Mono','SF Mono',monospace;
  --font-cn:'Microsoft YaHei','PingFang SC',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);color:var(--text);font-family:var(--font-cn);min-height:100vh}

.bg-grid{position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(900px 420px at 50% -80px, rgba(64,158,255,.06), transparent 60%)}

.hero,.foot{position:relative;z-index:1}
main{position:relative;z-index:1}

.hero{max-width:880px;margin:0 auto;padding:76px 20px 26px;text-align:center}
.brand h1{font-size:46px;font-weight:700;letter-spacing:.32em;padding-left:.32em;
  text-shadow:0 0 40px rgba(64,158,255,.15)}
.brand-en{margin-top:10px;font-family:var(--font-display);font-size:13px;
  letter-spacing:.52em;color:var(--accent);display:flex;align-items:center;justify-content:center;gap:6px}
.tagline{margin-top:18px;color:var(--muted);font-size:14px}
.tagline b{color:var(--text);font-family:var(--font-display);letter-spacing:.08em}

.eq{display:inline-flex;gap:3px;align-items:flex-end;height:14px}
.eq i{width:3px;background:var(--accent);border-radius:1px;transform-origin:bottom;
  animation:eq 1.1s ease-in-out infinite}
.eq i:nth-child(1){height:6px;animation-delay:0s}
.eq i:nth-child(2){height:11px;animation-delay:.15s}
.eq i:nth-child(3){height:14px;animation-delay:.3s}
.eq i:nth-child(4){height:9px;animation-delay:.45s}
.eq i:nth-child(5){height:5px;animation-delay:.6s}
@keyframes eq{0%,100%{transform:scaleY(.3)}50%{transform:scaleY(1)}}

.search{display:flex;align-items:center;max-width:640px;margin:30px auto 0;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:6px 6px 6px 16px;
  box-shadow:0 0 0 1px rgba(0,0,0,.06),0 18px 50px rgba(0,0,0,.1);
  transition:border-color .2s,box-shadow .2s}
.search:focus-within{border-color:rgba(64,158,255,.55);
  box-shadow:0 0 0 4px rgba(64,158,255,.08),0 18px 50px rgba(0,0,0,.1)}
.sicon{color:var(--faint);flex:none}
.search input{flex:1;min-width:0;background:none;border:0;outline:0;color:var(--text);
  font-size:17px;font-family:var(--font-cn);height:46px;padding:0 12px}
.search input::placeholder{color:var(--faint)}
.search button{background:var(--accent);color:#ffffff;border:0;border-radius:9px;
  height:46px;padding:0 28px;font-family:var(--font-display);font-weight:700;
  font-size:15px;letter-spacing:.14em;cursor:pointer;transition:filter .15s,transform .05s}
.search button:hover{filter:brightness(1.08)}
.search button:active{transform:translateY(1px)}

.filters{display:flex;justify-content:center;align-items:center;gap:16px;
  flex-wrap:wrap;margin-top:22px}
.seg{display:flex;background:var(--surface);border:1px solid var(--line);
  border-radius:10px;padding:3px}
.seg button{border:0;background:none;color:var(--muted);padding:7px 18px;
  border-radius:8px;cursor:pointer;font-size:13.5px;font-family:var(--font-cn);transition:.15s}
.seg button:hover{color:var(--text)}
.seg button.on{background:var(--surface2);color:var(--accent);
  box-shadow:inset 0 0 0 1px var(--line)}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.chips button{border:1px solid var(--line);background:transparent;color:var(--muted);
  border-radius:999px;padding:6px 14px;font-size:12.5px;cursor:pointer;
  font-family:var(--font-cn);transition:.15s}
.chips button:hover{color:var(--text)}
.chips button.on{color:var(--accent);border-color:rgba(64,158,255,.5);background:var(--accent-dim)}

.stats{margin-top:24px;color:var(--muted);font-size:12.5px;letter-spacing:.05em}
.stats b{color:var(--text);font-family:var(--font-mono);font-weight:600}
.stats b.dead{color:var(--muted)}
.stats .sep{margin:0 9px;color:#C0C4CC}

main{max-width:880px;margin:0 auto;padding:12px 20px 60px}
.status{text-align:center;color:var(--muted);padding:34px 0;font-size:14px}
.status .ex{border:1px dashed #C0C4CC;background:none;color:var(--muted);
  border-radius:999px;padding:5px 14px;cursor:pointer;font-size:13px;
  margin:0 3px;font-family:var(--font-cn);transition:.15s}
.status .ex:hover{color:var(--accent);border-color:rgba(64,158,255,.5)}

.results{display:flex;flex-direction:column}
.row{display:grid;grid-template-columns:36px 1fr auto;gap:14px;align-items:center;
  padding:14px 16px;border-bottom:1px solid var(--line);position:relative;
  animation:rowin .3s both}
.row::before{content:'';position:absolute;left:0;top:22%;bottom:22%;width:2px;
  background:transparent;transition:.15s}
.row:hover{background:var(--surface)}
.row:hover::before{background:var(--accent)}
.row.dead{opacity:.55}
@keyframes rowin{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.idx{font-family:var(--font-mono);font-size:12px;color:var(--faint)}
.artist{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:3px}
.title{font-size:15.5px;font-weight:600}

.meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.keyb{font-family:var(--font-display);font-weight:700;font-size:15px;color:var(--accent);
  border:1px solid rgba(64,158,255,.4);background:var(--accent-dim);border-radius:8px;
  padding:5px 10px;cursor:pointer;letter-spacing:.04em;transition:.15s;user-select:none}
.keyb:hover{box-shadow:0 0 14px rgba(64,158,255,.25);transform:translateY(-1px)}
.scale{font-size:12px;border-radius:6px;padding:4px 8px;border:1px solid}
.scale.major{color:var(--amber);border-color:rgba(255,184,77,.35);background:rgba(255,184,77,.08)}
.scale.minor{color:var(--blue);border-color:rgba(90,216,255,.35);background:rgba(90,216,255,.08)}
.bpm{font-family:var(--font-mono);font-size:16px;color:var(--text);text-align:right;min-width:56px}
.bpm small{display:block;font-size:9px;color:var(--faint);letter-spacing:.22em;font-weight:400}
.qtag{font-size:11px;letter-spacing:.08em;padding:3px 9px;border-radius:999px;
  border:1px solid;display:inline-flex;align-items:center;gap:5px}
.qtag i{width:6px;height:6px;border-radius:50%;display:inline-block}
.qtag.official{color:#409EFF;border-color:rgba(64,158,255,.32)}
.qtag.official i{background:#409EFF}
.qtag.user{color:var(--blue);border-color:rgba(90,216,255,.32)}
.qtag.user i{background:var(--blue)}
.qtag.dead{color:#909399;border-color:#DCDFE6}
.qtag.dead i{background:#909399}

.pager{display:flex;justify-content:center;align-items:center;gap:8px;
  margin-top:26px;flex-wrap:wrap}
.pager button{border:1px solid var(--line);background:var(--surface);color:var(--muted);
  border-radius:8px;min-width:34px;height:34px;padding:0 10px;cursor:pointer;
  font-family:var(--font-mono);font-size:13px;transition:.15s}
.pager button:hover:not(:disabled):not(.cur){color:var(--text);border-color:#C0C4CC}
.pager button.cur{color:#ffffff;background:var(--accent);border-color:var(--accent);font-weight:700}
.pager button:disabled{opacity:.35;cursor:default}
.pager .info{font-size:12px;color:var(--muted);margin:0 10px;font-family:var(--font-mono)}

.toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);
  background:var(--surface2);border:1px solid var(--line);color:var(--text);
  padding:10px 18px;border-radius:10px;font-size:13px;opacity:0;pointer-events:none;
  transition:.25s;box-shadow:0 10px 30px rgba(0,0,0,.1);z-index:9}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast b{color:var(--accent);font-family:var(--font-mono)}

.foot{max-width:880px;margin:0 auto;padding:26px 20px 50px;border-top:1px solid var(--line);
  color:var(--muted);font-size:12px;text-align:center}
.foot p + p{margin-top:8px}
.foot code{font-family:var(--font-mono);color:var(--blue);background:var(--surface);
  padding:2px 6px;border-radius:5px}
.foot a{color:var(--accent);text-decoration:none}
.foot-note{opacity:.75}

.login-modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}
.login-modal-overlay{position:absolute;inset:0;background:rgba(0,0,0,.35);backdrop-filter:blur(4px)}
.login-card{position:relative;max-width:400px;width:100%;text-align:center;
  background:var(--surface);border:1px solid var(--line);border-radius:16px;
  padding:36px 28px 28px;box-shadow:0 24px 70px rgba(0,0,0,.15)}
.login-card .brand h1{font-size:42px;font-weight:700;letter-spacing:.32em;padding-left:.32em;
  text-shadow:0 0 40px rgba(64,158,255,.15)}
.login-card .brand-en{margin-top:10px;font-family:var(--font-display);font-size:13px;
  letter-spacing:.52em;color:var(--accent);display:flex;align-items:center;justify-content:center;gap:6px}
.login-card .tagline{margin-top:18px;color:var(--muted);font-size:14px;margin-bottom:28px}
.login-card .tagline b{color:var(--text);font-family:var(--font-display);letter-spacing:.08em}
.login-form{display:flex;flex-direction:column;gap:12px}
.login-form input{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:10px;
  height:46px;padding:0 16px;color:var(--text);font-size:15px;font-family:var(--font-cn);outline:0;
  transition:border-color .2s,box-shadow .2s}
.login-form input:focus{border-color:rgba(64,158,255,.55);box-shadow:0 0 0 4px rgba(64,158,255,.08)}
.login-form input::placeholder{color:var(--faint)}
.login-form button{background:var(--accent);color:#ffffff;border:0;border-radius:10px;
  height:46px;font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:.14em;
  cursor:pointer;transition:filter .15s,transform .05s;margin-top:4px}
.login-form button:hover{filter:brightness(1.08)}
.login-form button:active{transform:translateY(1px)}
.login-form button:disabled{opacity:.6;cursor:default}
.login-error{margin-top:14px;color:#F56C6C;font-size:13px;min-height:18px}

.userbar{display:flex;align-items:center;justify-content:flex-end;gap:14px;
  max-width:880px;margin:0 auto;padding:16px 20px 0;position:relative;z-index:1}
.user-info{color:var(--muted);font-size:12.5px}
.logout-btn{border:1px solid var(--line);background:transparent;color:var(--muted);
  border-radius:8px;padding:5px 14px;font-size:12.5px;cursor:pointer;
  font-family:var(--font-cn);transition:.15s}
.logout-btn:hover{color:#F56C6C;border-color:rgba(245,108,108,.4)}

.login-btn{border:1px solid var(--line);background:transparent;color:var(--accent);
  border-radius:8px;padding:5px 14px;font-size:12.5px;cursor:pointer;
  font-family:var(--font-cn);transition:.15s}
.login-btn:hover{border-color:rgba(64,158,255,.5);background:var(--accent-dim)}

.login-close{margin-top:18px;border:0;background:none;color:var(--faint);
  font-size:13px;cursor:pointer;font-family:var(--font-cn);transition:.15s;width:100%}
.login-close:hover{color:var(--muted)}

@media (max-width:640px){
  .hero{padding-top:52px}
  .brand h1{font-size:32px}
  .search{padding-left:12px}
  .search button{padding:0 18px}
  .row{grid-template-columns:1fr;gap:8px}
  .idx{display:none}
  .meta{justify-content:flex-start}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* 按需求隐藏：数据库统计行 + 质量筛选（默认全部质量） */
.stats{display:none}
#quality-chips{display:none}

/* ===== 客户端下载卡片 ===== */
.dl-open{border:1px solid var(--line);background:transparent;color:var(--accent);
  border-radius:8px;padding:5px 14px;font-size:12.5px;cursor:pointer;
  font-family:var(--font-cn);transition:.15s}
.dl-open:hover{border-color:rgba(64,158,255,.5);background:var(--accent-dim)}
.dl-mask{position:fixed;inset:0;z-index:99;display:flex;align-items:center;justify-content:center;
  background:rgba(48,49,51,.45);opacity:0;pointer-events:none;transition:.18s}
.dl-mask.on{opacity:1;pointer-events:auto}
.dl-card{position:relative;width:min(400px,calc(100vw - 40px));background:var(--surface);
  border:1px solid var(--line);border-radius:14px;padding:26px 24px 20px;
  box-shadow:0 18px 50px rgba(0,0,0,.18);transform:translateY(10px) scale(.98);transition:.18s}
.dl-mask.on .dl-card{transform:none}
.dl-x{position:absolute;top:10px;right:12px;border:0;background:none;font-size:22px;
  color:var(--faint);cursor:pointer;line-height:1}
.dl-x:hover{color:var(--muted)}
.dl-title{font-size:19px;font-weight:700;color:var(--text);text-align:center}
.dl-sub{margin:6px 0 18px;font-size:12.5px;color:var(--muted);text-align:center}
.dl-item{display:flex;align-items:center;gap:12px;padding:13px 14px;margin-bottom:10px;
  background:var(--surface2);border:1px solid var(--line);border-radius:10px;
  text-decoration:none;transition:.15s}
.dl-item:hover{border-color:rgba(64,158,255,.55);background:var(--accent-dim)}
.dl-icon{width:44px;height:44px;border-radius:10px;object-fit:cover;flex:none;
  border:1px solid var(--line);background:#fff}
.dl-meta{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.dl-meta b{font-size:14px;color:var(--text)}
.dl-meta i{font-style:normal;font-size:12px;color:var(--muted)}
.dl-go{flex:none;border-radius:8px;padding:7px 16px;font-size:13px;color:#fff;
  background:var(--accent);font-family:var(--font-cn)}
.dl-tip{margin-top:6px;font-size:11.5px;color:var(--faint);text-align:center}

/* ===== 顶栏加高 + 按钮醒目 ===== */
.userbar{padding:26px 20px 0}
.dl-open,.login-btn,.logout-btn{padding:9px 20px;font-size:14px;font-weight:600;border-radius:9px}
.dl-open{background:var(--accent);color:#fff;border-color:var(--accent);
  box-shadow:0 3px 12px rgba(64,158,255,.35)}
.dl-open:hover{background:#337ecc;border-color:#337ecc;box-shadow:0 5px 16px rgba(64,158,255,.45)}
.login-btn{color:var(--accent);border-color:rgba(64,158,255,.55);background:var(--accent-dim)}
.login-btn:hover{background:rgba(64,158,255,.22);border-color:var(--accent)}

/* ===== 功能介绍 ===== */
.feat{max-width:880px;margin:0 auto;padding:10px 20px 6px;position:relative;z-index:1}
.feat-h{font-size:15px;color:var(--muted);letter-spacing:.3em;padding-left:.3em;text-align:center;margin-bottom:18px}
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px}
.feat-item{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px 15px}
.feat-item b{display:block;font-size:14.5px;color:var(--text);margin-bottom:7px}
.feat-item p{font-size:12.5px;line-height:1.7;color:var(--muted)}