:root{
  --bg:#ffffff;
  --ink:#020817;
  --text:#0f172a;
  --muted:#64748b;
  --line:rgba(5,5,5,.06);
  --line-strong:rgba(5,5,5,.12);
  --primary:#1677ff;
  --primary-hover:#3c89ff;
  --primary-soft:rgba(22,119,255,.08);
  --danger:#dc2626;
  --track:rgba(15,23,42,.08);
  --header-bg:rgba(255,255,255,.9);
  --r-card:12px;
  --r-pill:999px;
  --shadow-card:0 4px 20px -4px rgba(0,0,0,.05);
  --shadow-hover:0 8px 30px -6px rgba(22,119,255,.15);
  --shadow-toast:0 4px 16px rgba(2,8,23,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
svg.i{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
svg.i-sm{width:20px;height:20px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
section[id]{scroll-margin-top:88px}
.site-header{position:sticky;top:0;z-index:50;height:64px;background:var(--header-bg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:8px;margin-right:auto;font-size:17px;font-weight:800;color:var(--ink)}
.brand svg{color:var(--primary)}
.nav-links{display:flex;gap:24px;font-size:14px}
.nav-links a{color:var(--muted);transition:color .15s ease}
.nav-links a:hover{color:var(--text)}
.menu-btn{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:0;background:none;color:var(--ink)}
.mobile-menu{position:absolute;top:64px;left:0;right:0;display:flex;flex-direction:column;padding:4px 24px 12px;background:var(--bg);border-bottom:1px solid var(--line)}
.mobile-menu a{padding:13px 0;font-size:15px;color:var(--text);border-bottom:1px solid var(--line)}
.mobile-menu a:last-child{border-bottom:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border:1px solid transparent;border-radius:var(--r-pill);font-size:15px;font-weight:600;line-height:1.2;transition:background-color .15s ease,color .15s ease,border-color .15s ease,transform .15s ease}
.btn:active{transform:scale(.98)}
.btn:focus-visible,a:focus-visible,summary:focus-visible,.choice input:focus-visible+span{outline:2px solid var(--primary);outline-offset:2px}
.btn.primary{background:var(--primary);color:var(--bg)}
.btn.primary:hover{background:var(--primary-hover)}
.btn.outline{border-color:var(--line-strong);background:var(--bg);color:var(--text)}
.btn.outline:hover{border-color:var(--primary);color:var(--primary)}
.btn.sm{padding:8px 18px;font-size:14px}
.btn.lg{padding:14px 30px;font-size:16px}
.btn.w-full{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.hero{padding:72px 0 56px;text-align:center}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--line-strong);border-radius:var(--r-pill);font-size:13px;color:var(--muted)}
.badge svg{color:var(--primary)}
.hero h1{margin:20px 0 12px;font-size:36px;line-height:1.25;font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.accent{color:var(--primary)}
.hero .sub{max-width:580px;margin:0 auto;font-size:16px;color:var(--muted)}
.search{display:flex;align-items:center;gap:8px;max-width:640px;margin:32px auto 0;padding:6px 6px 6px 20px;border:1px solid var(--line-strong);border-radius:var(--r-pill);transition:border-color .15s ease,box-shadow .15s ease}
.search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.search input{flex:1;min-width:0;border:0;outline:0;background:transparent;color:var(--text)}
.search input::placeholder{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:20px}
.chip{padding:5px 14px;border:1px solid var(--line-strong);border-radius:var(--r-pill);font-size:13px;color:var(--muted)}
.hero .note{margin-top:16px;font-size:13px;color:var(--muted)}
.result-card{width:100%;max-width:760px;margin:0 auto;padding:24px;border-radius:var(--r-card);background:var(--bg);box-shadow:var(--shadow-card)}
.result-head{display:flex;gap:20px}
.cover{flex:none;width:280px;aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:var(--track)}
.cover img{width:100%;height:100%;object-fit:cover}
.result-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:14px}
.result-info h3{font-size:17px;line-height:1.5;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{font-size:13px;color:var(--muted)}
.choices{display:flex;flex-wrap:wrap;gap:8px}
.choice{position:relative;display:inline-flex}
.choice input{position:absolute;opacity:0;width:0;height:0}
.choice span{padding:7px 16px;border:1px solid var(--line-strong);border-radius:var(--r-pill);font-size:13px;font-weight:500;color:var(--muted);transition:color .15s ease,border-color .15s ease,background-color .15s ease}
.choice:hover span{color:var(--text)}
.choice input:checked+span{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.actions{display:flex;flex-wrap:wrap;gap:12px}
#result-card.with-head .status-block{border-top:1px solid var(--line);margin-top:22px;padding-top:22px}
.status-row{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}
.status-label{font-size:14px;font-weight:600;color:var(--text)}
.status-pct{font-size:14px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums}
.bar{height:8px;border-radius:var(--r-pill);background:var(--track);overflow:hidden}
.bar-fill{height:100%;width:0;border-radius:var(--r-pill);background:var(--primary);transition:width .25s linear}
.bar.indet .bar-fill{width:40%;animation:indet 1.1s linear infinite}
@keyframes indet{from{transform:translateX(-100%)}to{transform:translateX(260%)}}
.status-stats{margin-top:8px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.done-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink)}
.done-title svg{color:var(--primary)}
.done-file{margin:8px 0 16px;font-size:14px;color:var(--muted);word-break:break-all}
.err-msg{margin-bottom:10px;font-size:14px;font-weight:500;color:var(--danger)}
.result-batch{display:flex;flex-direction:column;gap:14px}
.batch-info h3{font-size:17px;line-height:1.5;font-weight:700;color:var(--ink)}
.batch-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px}
.batch-check-all{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--text);cursor:pointer}
.batch-check-all input{accent-color:var(--primary);width:16px;height:16px;cursor:pointer}
.batch-list{max-height:380px;overflow-y:auto;border:1px solid var(--line);border-radius:8px}
.batch-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);font-size:14px;min-height:44px}
.batch-item:last-child{border-bottom:0}
.batch-item input[type="checkbox"]{flex:none;accent-color:var(--primary);width:16px;height:16px;cursor:pointer}
.bi-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}
.bi-state{flex:none;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.batch-item.is-done .bi-state{color:var(--primary);font-weight:600}
.batch-item.is-error .bi-state{color:var(--danger)}
.bi-tag{flex:none;padding:2px 10px;border:1px solid var(--line-strong);border-radius:var(--r-pill);font-size:12px;color:var(--muted)}
.bi-save{flex:none;font-size:13px;font-weight:600;color:var(--primary);text-decoration:underline}
.bi-save:hover{color:var(--primary-hover)}
.link-btn{border:0;background:none;padding:0;font-size:14px;font-weight:600;color:var(--primary);text-decoration:underline;transition:color .15s ease}
.link-btn:hover{color:var(--primary-hover)}
.section{padding-block:72px}
.section h2{margin-bottom:8px;text-align:center;font-size:24px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.sec-sub{margin-bottom:40px;text-align:center;font-size:14px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{padding:24px;border-radius:var(--r-card);background:var(--bg);box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card>svg{color:var(--primary);margin-bottom:14px}
.card h3{margin-bottom:6px;font-size:16px;font-weight:700;color:var(--ink)}
.card p{font-size:14px;color:var(--muted)}
.pricing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;max-width:820px;margin:0 auto}
.price-card{display:flex;flex-direction:column;padding:32px;border:2px solid transparent;border-radius:var(--r-card);background:var(--bg);box-shadow:var(--shadow-card)}
.price-card.pro{position:relative;border-color:var(--primary);box-shadow:none}
.pro-badge{position:absolute;top:-13px;right:24px;padding:4px 12px;border-radius:var(--r-pill);background:var(--primary);color:var(--bg);font-size:12px;font-weight:600}
.price-card h3{font-size:18px;font-weight:700;color:var(--ink)}
.price{display:flex;align-items:baseline;gap:6px;margin:14px 0 22px}
.price .num{font-size:38px;font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.price .per{font-size:13px;color:var(--muted)}
.price-card ul{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;list-style:none}
.price-card li{display:flex;align-items:center;gap:10px;font-size:14px}
.price-card li svg{color:var(--primary)}
.price-card .btn{margin-top:auto}
.faq{max-width:760px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 4px;font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary svg{color:var(--muted);transition:transform .2s ease}
.faq details[open] summary svg{transform:rotate(45deg)}
.faq-a{padding:0 4px 18px;font-size:14px;line-height:1.7;color:var(--muted)}
.site-footer{border-top:1px solid var(--line);padding:32px 0;text-align:center;font-size:13px;color:var(--muted)}
.site-footer p+p{margin-top:6px}
.toast{position:fixed;left:50%;bottom:32px;z-index:100;transform:translate(-50%,16px);padding:12px 22px;border-radius:var(--r-pill);background:var(--ink);color:var(--bg);font-size:14px;opacity:0;pointer-events:none;box-shadow:var(--shadow-toast);transition:opacity .2s ease,transform .2s ease}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:1024px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){
  .nav-links{display:none}
  .menu-btn{display:inline-flex}
  .nav{gap:12px}
  .hero{padding:48px 0 40px}
  .hero h1{font-size:30px}
  .search{padding-left:16px}
  .grid,.grid-3,.pricing-grid{grid-template-columns:1fr}
  .result-head{flex-direction:column}
  .cover{width:100%}
  .section{padding-block:56px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}