:root{
  --bg:#07030f; --bg2:#0d0722; --card:#120b2b; --card2:#171038;
  --line:rgba(255,255,255,.09); --txt:#f4f1ff; --mut:#a79fd0; --mut2:#7e76ad;
  --vio:#6c5ce7; --vio2:#a55eea; --pink:#e84393; --teal:#00d2a8; --red:#ff6b81;
  --grad:linear-gradient(92deg,#6c5ce7,#a55eea 55%,#e84393);
  --r:18px; --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--vio);color:#fff}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,3,15,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:60px}
.logo{display:flex;align-items:center;gap:9px;font-size:21px;font-weight:900;letter-spacing:-.3px}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--grad);box-shadow:0 6px 18px rgba(168,85,247,.45)}
.site-nav{display:flex;gap:22px;font-size:15px;color:var(--mut)}
.site-nav a:hover{color:var(--txt)}

/* hero */
.hero{padding:52px 0 30px;text-align:center;background:radial-gradient(720px 320px at 50% -60px,rgba(108,92,231,.35),transparent 70%)}
.pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--mut);border:1px solid var(--line);background:var(--card);padding:7px 14px;border-radius:999px}
.pill i{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal)}
.hero h1{font-size:clamp(32px,6vw,54px);line-height:1.08;font-weight:900;letter-spacing:-1px;margin:20px 0 14px}
.hero .sub{max-width:640px;margin:0 auto;color:var(--mut);font-size:16px}
.dl-box{max-width:760px;margin:28px auto 0}
.dl-row{display:flex;gap:10px}
.dl-input{flex:1;display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:0 8px 0 16px;min-height:56px;color:var(--mut)}
.dl-input:focus-within{border-color:var(--vio);box-shadow:0 0 0 3px rgba(108,92,231,.25)}
.dl-input input{flex:1;min-width:0;background:none;border:0;outline:0;color:var(--txt);font-size:16px;font-family:inherit}
.dl-input input::placeholder{color:var(--mut2)}
.icon-btn{flex:none;background:var(--card2);border:1px solid var(--line);color:var(--txt);font-size:13px;font-weight:700;border-radius:9px;padding:8px 12px;cursor:pointer}
.icon-btn:hover{border-color:var(--vio)}
.dl-btn{flex:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--grad);color:#fff;border:0;border-radius:14px;padding:0 24px;min-height:56px;font-size:16px;font-weight:800;cursor:pointer;box-shadow:0 10px 28px rgba(168,85,247,.4)}
.dl-btn:hover{filter:brightness(1.08)}
.dl-btn:disabled{opacity:.6;cursor:wait}
.format-row{display:flex;justify-content:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.fmt{display:inline-flex;align-items:center;gap:7px;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;font-weight:600;color:var(--mut);cursor:pointer}
.fmt:has(input:checked){border-color:var(--vio);color:var(--txt);background:var(--card2)}
.fmt input{accent-color:var(--vio)}
.dl-hint{margin-top:18px;color:var(--mut2);font-size:13.5px}
.dl-hint b{color:var(--mut)}
.dl-note{margin-top:6px;color:var(--mut2);font-size:13px}
.dl-note a{color:var(--mut);text-decoration:underline}

/* result */
.result{max-width:760px;margin:22px auto 0;text-align:left}
.result:empty{display:none}
.res-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--shadow);display:flex;gap:16px}
.res-thumb{flex:none;width:132px;border-radius:12px;overflow:hidden;position:relative}
.res-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9}
.res-body{flex:1;min-width:0}
.res-title{font-size:16.5px;font-weight:800;line-height:1.35;margin-bottom:4px;word-break:break-word}
.res-meta{color:var(--mut2);font-size:13px;margin-bottom:12px}
.res-links{display:flex;flex-direction:column;gap:8px}
.res-link{display:inline-flex;align-items:center;gap:9px;background:var(--grad);color:#fff;font-weight:800;font-size:15px;border-radius:11px;padding:11px 16px;width:fit-content;max-width:100%}
.res-link.audio{background:var(--card2);border:1px solid var(--vio);color:var(--txt)}
.res-link:hover{filter:brightness(1.1)}
.res-note{color:var(--mut2);font-size:12.5px;margin-top:10px}
.res-error{background:#2b0f1e;border:1px solid rgba(255,107,129,.4);border-radius:var(--r);padding:16px 18px}
.res-error b{color:#ffb3c0}
.res-error p{color:#f3c6cd;font-size:14.5px;margin-top:4px}
.res-loading{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;color:var(--mut);font-size:15px}
.spinner{flex:none;width:20px;height:20px;border:3px solid rgba(255,255,255,.18);border-top-color:var(--vio2);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* sections */
.section{padding:44px 0}
.sec-head{text-align:center;margin-bottom:28px}
.kicker{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:var(--vio2)}
.sec-head h2{font-size:clamp(24px,4vw,32px);font-weight:900;letter-spacing:-.5px;margin-top:8px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--grad);font-weight:900;font-size:16px;margin-bottom:12px}
.step h3{font-size:17px;margin-bottom:6px}
.step p{color:var(--mut);font-size:14.5px}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-list details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.faq-list summary{cursor:pointer;font-weight:700;font-size:16px;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";float:right;color:var(--vio2);font-size:20px;line-height:1}
.faq-list details[open ] summary::after{content:"–"}
.faq-list p{color:var(--mut);font-size:14.5px;margin-top:10px}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg2);padding:36px 0 22px}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer-tag{color:var(--mut2);font-size:13.5px;max-width:340px;margin-top:10px}
.footer-nav{display:flex;gap:22px;align-items:flex-start;font-size:14.5px;color:var(--mut)}
.footer-nav a:hover{color:var(--txt)}
.footer-copy{text-align:center;color:var(--mut2);font-size:12.5px;margin-top:28px}
.page{max-width:760px;margin:0 auto;padding:44px 20px 60px}
.page h1{font-size:clamp(26px,4.5vw,36px);font-weight:900;letter-spacing:-.5px;margin-bottom:6px}
.page .lede{color:var(--mut);margin-bottom:22px}
.page h2{font-size:20px;margin:26px 0 8px}
.page p,.page li{color:var(--mut);font-size:15.5px}
.page ul{padding-left:20px;display:flex;flex-direction:column;gap:6px}
.page a{color:#c9b8ff;text-decoration:underline}
.page address{font-style:normal;color:var(--mut)}

@media (max-width:640px){
  .site-nav{display:none}
  .hero{padding:38px 0 22px}
  .dl-row{flex-direction:column}
  .dl-btn{width:100%}
  .steps{grid-template-columns:1fr}
  .res-card{flex-direction:column}
  .res-thumb{width:100%}
  .res-link{width:100%;justify-content:center}
}