:root{
  --bg:#05070a;
  --bg2:#0b0f14;
  --card:#12171f;
  --card2:#171d27;
  --line:rgba(255,255,255,.08);
  --line2:rgba(255,255,255,.14);
  --text:#f3f6fb;
  --muted:#9aa3b2;
  --muted2:#6b7385;
  --brand:#38bdf8;
  --brand2:#0ea5e9;
  --brand-dim:rgba(14,165,233,.14);
  --glow:0 0 18px rgba(56,189,248,.35);
  --radius:18px;
  --radius-sm:12px;
  --tap:48px;
  --max:720px;
  --max-wide:960px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%;
  background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Noto Sans SC",sans-serif;
  line-height:1.55;-webkit-text-size-adjust:100%}
body{
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(14,165,233,.18), transparent 60%),
    radial-gradient(800px 400px at 90% 20%, rgba(56,189,248,.08), transparent 50%),
    var(--bg);
  background-attachment:fixed;
}
a{color:var(--brand);text-decoration:none}
a:hover{color:#7dd3fc}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
img{max-width:100%;display:block}

/* Header */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 20px;max-width:var(--max-wide);margin:0 auto;
  position:sticky;top:0;z-index:40;
  background:rgba(5,7,10,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
}
.topbar.scrolled{border-bottom-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:18px;letter-spacing:.02em}
.brand img{width:34px;height:34px;border-radius:10px;box-shadow:var(--glow)}
.brand-text{background:linear-gradient(90deg,#7dd3fc,#38bdf8 40%,#0ea5e9);-webkit-background-clip:text;background-clip:text;color:transparent}
.langwrap{position:relative}
.langbtn{
  min-height:40px;padding:0 12px 0 10px;border:1px solid var(--line2);border-radius:999px;
  background:rgba(255,255,255,.03);color:var(--text);
  display:inline-flex;align-items:center;gap:6px;font-size:13px;cursor:pointer;white-space:nowrap
}
.langbtn:hover{border-color:rgba(56,189,248,.45)}
.langmenu{
  position:absolute;right:0;top:calc(100% + 8px);background:#0f141c;border:1px solid var(--line2);
  border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.45);list-style:none;margin:0;padding:6px;min-width:148px;z-index:50
}
.langmenu a{display:block;padding:10px 12px;border-radius:10px;color:var(--text);min-height:44px}
.langmenu a:hover,.langmenu a[aria-current="true"]{background:var(--brand-dim);color:var(--brand)}

/* Ads */
.ad-slot{margin:16px auto;max-width:var(--max);padding:0 16px}
.ad-ph{
  border:1px dashed rgba(56,189,248,.45);background:rgba(14,165,233,.08);color:var(--brand);
  border-radius:14px;min-height:72px;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;letter-spacing:.02em
}
.ad-sticky{
  position:fixed;left:0;right:0;bottom:0;z-index:30;margin:0;
  padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:rgba(5,7,10,.92);border-top:1px solid var(--line);backdrop-filter:blur(10px)
}
.ad-sticky .ad-ph{min-height:50px}
body.has-sticky-ad{padding-bottom:88px}

/* Main / Hero */
.main{max-width:var(--max);margin:0 auto;padding:12px 16px 56px}
.hero{text-align:center;padding:18px 0 8px}
.hero-title{margin:0;font-size:clamp(28px,7vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.hero-title .glow{
  color:var(--brand);
  text-shadow:0 0 12px rgba(56,189,248,.45), 0 0 28px rgba(14,165,233,.25);
}
.hero-sub{margin:10px 0 0;color:var(--muted);font-size:clamp(15px,3.5vw,18px);font-weight:500}

/* Platform pills */
.platforms{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:22px 0 6px}
.plat{
  width:48px;height:48px;border-radius:14px;border:1px solid var(--line2);
  background:rgba(255,255,255,.03);display:inline-flex;align-items:center;justify-content:center;
  color:#e5e7eb;transition:.15s ease
}
.plat:hover{border-color:rgba(56,189,248,.5);background:var(--brand-dim);color:var(--brand);transform:translateY(-1px)}
.plat svg{width:22px;height:22px}

/* Input shell */
.box{
  margin-top:18px;background:rgba(18,23,31,.9);border:1px solid var(--line2);
  border-radius:22px;padding:10px;box-shadow:0 24px 60px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.04)
}
.input-shell{
  display:flex;align-items:center;gap:8px;
  background:var(--bg2);border:1px solid var(--line);border-radius:16px;padding:6px 6px 6px 14px;
  min-height:var(--tap)
}
.input-shell:focus-within{border-color:rgba(56,189,248,.55);box-shadow:0 0 0 3px rgba(14,165,233,.15)}
#urlInput{
  flex:1;min-width:0;border:0;outline:none;background:transparent;color:var(--text);
  font-size:16px;padding:10px 0; /* 16px avoids iOS zoom */
}
#urlInput::placeholder{color:var(--muted2)}
.btn-inline{
  flex:0 0 auto;white-space:nowrap;min-height:40px;padding:0 16px;border-radius:12px;
  border:1px solid rgba(56,189,248,.55);background:transparent;color:var(--brand);
  font-size:14px;font-weight:700;cursor:pointer;letter-spacing:.02em
}
.btn-inline:hover{background:var(--brand-dim)}
.btn-inline:disabled{opacity:.55;cursor:wait}
.row-actions{display:flex;gap:8px;margin-top:10px;flex-wrap:nowrap}
.btn{
  min-height:var(--tap);padding:0 18px;border-radius:14px;border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  white-space:nowrap
}
.btn.primary{
  flex:1;background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#041018;
  box-shadow:0 10px 30px rgba(14,165,233,.28)
}
.btn.primary:hover{filter:brightness(1.06)}
.btn.primary:disabled{opacity:.6;cursor:wait;filter:none}
.btn.ghost{background:transparent;border-color:var(--line2);color:var(--muted)}
.btn.ghost:hover{color:var(--text);border-color:var(--line2)}
.hint{margin:12px 0 2px;color:var(--muted2);font-size:12px;text-align:center}

/* Status / Result */
.status{margin-top:14px;padding:12px 14px;border-radius:14px;background:var(--brand-dim);color:var(--brand);font-weight:600;text-align:center}
.status.err{background:rgba(239,68,68,.12);color:#f87171}
.result{
  margin-top:16px;background:var(--card);border:1px solid var(--line2);border-radius:20px;
  overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.3);text-align:left
}
.result-top{display:flex;gap:14px;padding:16px;align-items:flex-start}
.result-top img{width:112px;height:112px;object-fit:cover;border-radius:14px;background:#0b0f14;flex-shrink:0;border:1px solid var(--line)}
.result-meta{min-width:0;flex:1}
.result-meta h2{font-size:16px;margin:0 0 8px;word-break:break-word;font-weight:700;line-height:1.35}
.result-meta .sub{color:var(--muted);font-size:13px}
.qlist{display:flex;flex-direction:column;gap:10px;padding:0 16px 16px}
.qbtn{
  min-height:var(--tap);display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 16px;border-radius:14px;border:1px solid rgba(56,189,248,.35);
  background:rgba(14,165,233,.06);color:var(--brand);font-size:15px;font-weight:700;text-decoration:none;
  transition:.15s ease
}
.qbtn:hover{background:rgba(14,165,233,.14);border-color:var(--brand);box-shadow:var(--glow)}
.qbtn .badge,.qbtn .size{font-size:12px;font-weight:500;color:var(--muted);text-align:right}

/* How-to */
.section{margin-top:40px}
.section h2{
  text-align:center;font-size:clamp(20px,4.5vw,26px);margin:0 0 20px;font-weight:800;
  color:var(--brand);text-shadow:0 0 14px rgba(56,189,248,.3)
}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.steps li{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:22px 18px 18px;text-align:center
}
.steps .num{
  position:absolute;left:14px;top:-10px;width:28px;height:28px;border-radius:50%;
  background:var(--brand2);color:#041018;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:13px;box-shadow:var(--glow)
}
.steps .ico{
  width:48px;height:48px;margin:4px auto 12px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-dim);color:var(--brand);border:1px solid rgba(56,189,248,.25)
}
.steps .ico svg{width:24px;height:24px}
.steps strong{display:block;margin-bottom:6px;font-size:16px}
.steps span{color:var(--muted);font-size:13px;display:block;line-height:1.55}

/* FAQ */
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:2px 16px;margin-bottom:10px
}
.faq summary{
  min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  cursor:pointer;font-weight:700;list-style:none
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"＋";color:var(--brand);font-weight:700;font-size:16px}
.faq details[open] summary::after{content:"－"}
.faq p{margin:0 0 14px;color:var(--muted);font-size:14px;text-align:left}

/* Footer */
.foot{
  max-width:var(--max);margin:0 auto;padding:8px 16px 48px;color:var(--muted2);font-size:12px;text-align:center
}
.foot .disc{line-height:1.6;margin:0 0 14px}
.foot .links{display:flex;justify-content:center;gap:20px;margin:0}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--brand)}

/* Legal */
.legal{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:left
}
.legal h1{font-size:22px;margin-top:0}
.legal ul{padding-left:18px;color:var(--muted)}

/* Admin (keep usable on dark) */
.admin-body{min-height:100vh;display:flex;justify-content:center;padding:24px 12px;background:var(--bg);color:var(--text)}
.admin-card,.admin-wrap{width:100%;max-width:400px;align-self:flex-start}
.admin-wrap{max-width:760px}
.admin-card,.admin-form fieldset{
  background:var(--card);border:1px solid var(--line2);border-radius:16px;padding:18px;margin:0 0 14px
}
.admin-card label,.admin-form label{display:block;margin:12px 0;font-weight:600}
.admin-card input,.admin-form input[type=text],.admin-form input:not([type]),.admin-form textarea{
  width:100%;min-height:44px;margin-top:6px;padding:10px 12px;border:1px solid var(--line2);
  border-radius:10px;font-size:15px;background:var(--bg2);color:var(--text)
}
.admin-form textarea{min-height:120px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.ok{color:#4ade80;font-weight:600}
.err{color:#f87171;font-weight:600}
.admin-note{color:var(--muted);font-size:13px}
.chk{font-weight:600 !important}

@media (min-width:860px){
  .main{max-width:var(--max-wide);padding-top:24px}
  .hero{padding-top:36px}
  .box{max-width:640px;margin-left:auto;margin-right:auto}
  .steps{grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch}
  .steps li{padding-top:28px}
  .result{max-width:640px;margin-left:auto;margin-right:auto}
  .ad-slot{max-width:var(--max-wide)}
}

.btn-go{
  border-color:transparent !important;
  background:linear-gradient(135deg,#38bdf8,#0ea5e9) !important;
  color:#041018 !important;
  min-width:64px;
  box-shadow:0 6px 18px rgba(14,165,233,.25);
}
.btn-paste{display:inline-flex;align-items:center;gap:6px;padding:0 12px}
.paste-label{font-size:13px}
@media (max-width:420px){
  .paste-label{display:none}
  .btn-paste{padding:0 10px;min-width:40px}
  .btn-go{padding:0 14px}
}

/* Sponsor / rent tiles */
.sponsors{margin-top:16px;text-align:left}
.sponsor-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;
}
.sponsor-tile{
  display:flex;align-items:center;gap:10px;min-height:64px;
  padding:10px 12px;border-radius:14px;
  background:rgba(255,255,255,.03);border:1px solid var(--line2);
  color:var(--text);text-decoration:none;transition:.15s ease;
}
.sponsor-tile:hover{border-color:rgba(56,189,248,.45);background:var(--brand-dim);color:var(--text)}
.sponsor-tile.rent{border-style:dashed;border-color:rgba(56,189,248,.4)}
.sponsor-ico{
  width:36px;height:36px;border-radius:10px;object-fit:cover;flex-shrink:0;background:#0b0f14
}
.rent-ico{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-dim);font-size:18px;line-height:1
}
.sponsor-text{min-width:0;display:flex;flex-direction:column;gap:2px}
.sponsor-text strong{
  font-size:13px;font-weight:700;line-height:1.3;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis
}
.sponsor-text em{
  font-style:normal;font-size:11px;color:var(--muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis
}
@media (min-width:860px){
  .sponsor-grid{grid-template-columns:repeat(4,1fr);max-width:640px;margin:0 auto}
  .sponsors{max-width:640px;margin-left:auto;margin-right:auto}
}
@media (max-width:420px){
  .sponsor-grid{gap:8px}
  .sponsor-tile{min-height:58px;padding:8px 10px}
}

/* Admin tile editor */
.tile-edit{
  margin:14px 0;padding:12px;border:1px solid var(--line2);border-radius:12px;background:rgba(0,0,0,.2)
}
.tile-edit-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.tile-edit-actions{display:flex;gap:6px}
.tile-edit .danger{color:#f87171}
.i18n-opt{margin-top:8px;border-top:1px solid var(--line);padding-top:8px}
.i18n-opt summary{cursor:pointer;color:var(--brand);font-weight:600;margin-bottom:8px}


/* Single platform icon — keep balanced when only Twitter/X */
.platforms-single{gap:0}
.platforms-single .plat{
  width:56px;height:56px;border-radius:16px;
  background:rgba(255,255,255,.04);border-color:rgba(56,189,248,.35);
  box-shadow:0 0 20px rgba(56,189,248,.12)
}
.platforms-single .plat svg{width:26px;height:26px}

/* Featured promo banner (主推) */
.promo-wrap{max-width:var(--max-wide);margin:10px auto 0;padding:0 16px}
.promo-banner{
  display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:16px;text-decoration:none;color:var(--text);
  background:
    linear-gradient(135deg, rgba(14,165,233,.22), rgba(56,189,248,.08) 45%, rgba(255,255,255,.03));
  border:1px solid rgba(56,189,248,.4);
  box-shadow:0 0 24px rgba(14,165,233,.18), inset 0 1px 0 rgba(255,255,255,.06);
  transition:.15s ease;
}
.promo-banner:hover{border-color:rgba(56,189,248,.7);transform:translateY(-1px);color:var(--text);
  box-shadow:0 8px 28px rgba(14,165,233,.25)}
.promo-logo{width:44px;height:44px;border-radius:12px;object-fit:cover;flex-shrink:0;background:#0b0f14}
.promo-badge{
  width:44px;height:44px;border-radius:12px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#041018;font-weight:800;font-size:14px;
  box-shadow:var(--glow)
}
.promo-copy{min-width:0;flex:1;display:flex;flex-direction:column;gap:2px;text-align:left}
.promo-headline{font-size:15px;font-weight:800;line-height:1.3;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.promo-sub{font-size:12px;color:var(--muted);line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.promo-cta{
  flex-shrink:0;white-space:nowrap;font-size:13px;font-weight:800;
  padding:10px 12px;border-radius:999px;
  background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#041018;
  box-shadow:0 6px 16px rgba(14,165,233,.3)
}
@media (max-width:420px){
  .promo-cta{padding:8px 10px;font-size:12px}
  .promo-headline{font-size:14px}
}
@media (min-width:860px){
  .promo-wrap{padding:0 20px;margin-top:14px}
  .promo-banner{padding:14px 18px;border-radius:18px}
  .promo-headline{font-size:17px}
  .promo-sub{font-size:13px}
}

/* Admin promo section */
.promo-admin-note{background:rgba(14,165,233,.1);border:1px solid rgba(56,189,248,.3);
  border-radius:12px;padding:12px;margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.5}
.admin-form .btn.primary{min-height:52px;font-size:17px}
.admin-saved-toast{
  position:sticky;top:8px;z-index:20;background:rgba(74,222,128,.15);border:1px solid #4ade80;
  color:#4ade80;padding:12px 14px;border-radius:12px;font-weight:700;margin-bottom:12px
}