:root{
  --bg:#f6f8fc;
  --card:#ffffff;
  --text:#111827;
  --muted:#667085;
  --border:#e5eaf3;
  --primary:#2457ff;
  --primary-dark:#193fc6;
  --soft:#eef4ff;
  --success:#16a34a;
  --danger:#dc2626;
  --shadow:0 22px 70px rgba(15,23,42,.08);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Arial,"Microsoft YaHei","PingFang SC",Helvetica,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left,rgba(36,87,255,.12),transparent 32%),
    radial-gradient(circle at top right,rgba(124,58,237,.10),transparent 30%),
    linear-gradient(180deg,#fff 0%,var(--bg) 58%,#eef3fb 100%);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
.site-shell{width:min(1120px,calc(100% - 36px));margin:0 auto}
.site-header{padding:22px 0 12px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:inline-flex;align-items:center;gap:12px;font-weight:900;font-size:22px;letter-spacing:-.03em}
.brand-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,#2457ff,#7c3aed);color:#fff;display:grid;place-items:center;box-shadow:0 14px 34px rgba(36,87,255,.25)}
.top-nav{display:flex;align-items:center;gap:18px;color:#475569;font-size:14px;font-weight:800}
.top-nav a{white-space:nowrap}
.top-nav a:hover{color:var(--primary)}
.hero{padding:42px 0 30px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:8px 14px;border-radius:999px;background:var(--soft);color:var(--primary);font-size:14px;font-weight:900;margin-bottom:18px}
.badge-dot{width:8px;height:8px;border-radius:999px;background:var(--success)}
h1{margin:0 auto 16px;max-width:900px;font-size:clamp(42px,6vw,72px);line-height:1.02;letter-spacing:-.06em}
.hero-subtitle{margin:0 auto;max-width:760px;color:var(--muted);font-size:18px}
.hero-points{margin-top:22px;display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.hero-points span{padding:7px 12px;border:1px solid var(--border);background:rgba(255,255,255,.76);border-radius:999px;color:#3c4658;font-size:13px;font-weight:800}

.tool-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start;padding:0 0 42px}
.card{background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border:1px solid rgba(226,232,240,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
.tool-card,.preview-card{padding:24px}
.preview-card{position:sticky;top:18px}
.simple-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.step{border:1px solid var(--border);background:#fff;border-radius:16px;padding:12px;text-align:center;color:#475569;font-size:13px;font-weight:900}
.step b{display:block;color:var(--primary);font-size:18px;line-height:1}
.upload-zone{border:2px dashed #c8d2e3;border-radius:21px;background:linear-gradient(45deg,rgba(36,87,255,.04),rgba(124,58,237,.04)),#fbfdff;min-height:250px;display:grid;place-items:center;text-align:center;padding:30px;cursor:pointer;transition:.2s ease}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--primary);background:#f5f9ff;transform:translateY(-1px)}
.upload-icon{width:72px;height:72px;border-radius:24px;background:var(--soft);display:grid;place-items:center;margin:0 auto 18px;color:var(--primary)}
.upload-zone h2{margin:0 0 8px;font-size:24px;letter-spacing:-.025em}
.upload-zone p{margin:0;color:var(--muted);font-size:15px}
input[type=file]{display:none}
.primary-options{margin-top:18px;padding:16px;border-radius:18px;border:1px solid var(--border);background:#fff;display:flex;justify-content:space-between;gap:16px;align-items:center}
.primary-options strong{display:block;font-size:15px}
.primary-options span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
.advanced-options{margin-top:14px;border:1px solid var(--border);background:#fff;border-radius:18px;overflow:hidden}
.advanced-options summary{cursor:pointer;list-style:none;padding:15px 17px;font-weight:900;display:flex;justify-content:space-between;gap:12px;align-items:center}
.advanced-options summary::-webkit-details-marker{display:none}
.advanced-options summary span{color:var(--muted);font-size:13px;font-weight:500}
.advanced-body{border-top:1px solid var(--border);padding:16px;display:grid;gap:16px}
.option-title{font-weight:900;margin-bottom:10px;display:flex;justify-content:space-between;gap:12px;align-items:center}
.option-help{color:var(--muted);font-size:12px;font-weight:500}
.checks{display:flex;flex-wrap:wrap;gap:10px}
.check-pill{display:inline-flex;align-items:center;gap:7px;padding:8px 11px;border:1px solid var(--border);border-radius:999px;background:#fff;cursor:pointer;user-select:none;font-size:13px}
.check-pill input,.switch-line input{accent-color:var(--primary)}
.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.field{display:grid;gap:7px;font-size:13px;font-weight:800}
select,input[type=color],input[type=text]{width:100%;height:44px;border:1px solid var(--border);border-radius:13px;padding:0 12px;background:#fff;color:var(--text);font:inherit}
input[type=color]{padding:4px}
.switch-line{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.btn,.download-btn{border:0;border-radius:15px;padding:14px 18px;font-weight:900;font-size:15px;cursor:pointer;transition:.2s ease;display:inline-flex;align-items:center;justify-content:center;gap:9px}
.btn-primary,.download-btn{background:var(--primary);color:#fff;box-shadow:0 14px 30px rgba(36,87,255,.25)}
.btn-primary:hover,.download-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-secondary{background:#eef2f7;color:#263246}
.btn-secondary:hover{background:#e2e8f0}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none}
.preview-title{margin:0 0 16px;font-size:22px;letter-spacing:-.03em}
.preview-area{min-height:250px;border-radius:20px;border:1px solid var(--border);background:linear-gradient(45deg,#e5e7eb 25%,transparent 25%),linear-gradient(-45deg,#e5e7eb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e5e7eb 75%),linear-gradient(-45deg,transparent 75%,#e5e7eb 75%);background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0;display:grid;place-items:center;overflow:hidden;padding:20px}
.preview-area.empty{background:#f8fafc}
.preview-area span{color:#7b8797;text-align:center}
.preview-area img,.preview-area canvas{max-width:210px;max-height:210px;object-fit:contain;filter:drop-shadow(0 14px 28px rgba(15,23,42,.18))}
.file-info{margin-top:16px;padding:14px;border-radius:16px;background:#f8fafc;color:var(--muted);font-size:14px;word-break:break-word}
.status{margin-top:16px;padding:13px 14px;border-radius:15px;font-size:14px;display:none}
.status.show{display:block}
.status.error{background:#fef2f2;color:var(--danger);border:1px solid #fecaca}
.status.success{background:#f0fdf4;color:var(--success);border:1px solid #bbf7d0}
.download-wrap{display:none;margin-top:16px}
.download-wrap.show{display:block}
.download-btn{width:100%}
.mini-previews{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.mini{width:76px;min-height:88px;border:1px solid var(--border);border-radius:16px;background:#fff;display:grid;place-items:center;padding:10px 8px;gap:6px;text-align:center;font-size:12px;color:var(--muted)}
.mini canvas{max-width:42px;max-height:42px}

#ads.speed-ad-block{display:block;clear:both;width:100%;padding:0 0 56px;margin:0}
#ads .text-sponsor-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;width:100%;margin:0 0 24px;padding:0}
#ads .text-sponsor-grid a{height:42px;min-width:0;border:1px solid #dbe3ef;border-radius:6px;background:#fff;display:flex;align-items:center;justify-content:center;text-align:center;color:#0759ff;font-weight:900;font-size:14px;line-height:1.2;box-shadow:0 1px 0 rgba(15,23,42,.02);transition:.16s ease;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0 8px}
#ads .text-sponsor-grid a:hover{border-color:#9bb7ff;background:#f7faff;transform:translateY(-1px)}
#ads .ad-section-title{display:block;margin:0 0 14px;font-size:19px;line-height:1.3;letter-spacing:-.02em;text-align:left}
#ads .partner-ad-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;width:100%;margin:0 0 28px;padding:0}
#ads .partner-card{height:142px;border:1px solid #dbe3ef;border-radius:6px;background:#fff;overflow:hidden;display:grid;grid-template-rows:110px 32px;box-shadow:0 1px 0 rgba(15,23,42,.02);transition:.16s ease;color:#111827}
#ads .partner-card:hover{border-color:#9bb7ff;transform:translateY(-1px)}
#ads .partner-logo{display:grid;place-items:center;text-align:center;font-weight:900;font-size:24px;letter-spacing:-.03em;padding:0!important;color:#fff;line-height:1.1;background:#f8fafc!important}
#ads .partner-logo img{display:block!important;max-width:100%!important;max-height:100%!important;width:100%!important;height:100%!important;object-fit:cover!important}
#ads .partner-card strong{display:flex;align-items:center;justify-content:center;padding:0 8px;color:#111827;font-size:13px;line-height:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background:#fff;font-weight:900}
#ads .bottom-banner-ad{height:100px;width:100%;border-radius:6px;background:#e4ebf4;display:grid;place-items:center;text-align:center;overflow:hidden;margin:0}
#ads .bottom-banner-ad a{width:100%;height:100%;display:grid;place-items:center;color:#93a2b6;font-size:28px;font-weight:900;letter-spacing:.02em;line-height:1.1}

.seo-section,.faq-section{padding:0 0 58px}
.section-heading{text-align:center;max-width:760px;margin:0 auto 22px}
.section-heading h2{margin:0 0 10px;font-size:clamp(28px,4vw,42px);line-height:1.1;letter-spacing:-.045em}
.section-heading p{margin:0;color:var(--muted)}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.info{padding:22px;border-radius:20px;background:#fff;border:1px solid var(--border)}
.info h3{margin:0 0 8px;font-size:18px}
.info p{margin:0;color:var(--muted);font-size:15px}
details.faq-item{background:#fff;border:1px solid var(--border);border-radius:18px;padding:15px 18px;margin-bottom:12px}
details.faq-item summary{cursor:pointer;font-weight:900}
details.faq-item p{color:var(--muted);margin:10px 0 0}
.site-footer{padding:28px 0 44px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;border-top:1px solid rgba(226,232,240,.8)}
.footer-links{display:flex;gap:14px;flex-wrap:wrap}
.footer-links a{white-space:nowrap}
.footer-links a:hover{color:var(--primary)}
.advertise-hero{padding:54px 0 28px;text-align:center}
.advertise-hero h1{font-size:clamp(40px,6vw,68px)}
.advertise-hero p{margin:0 auto;max-width:720px;color:var(--muted);font-size:18px}
.module-eyebrow{display:inline-flex;color:var(--primary);font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:900;margin-bottom:8px}
.ad-products{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:20px 0 30px}
.ad-products article,.contact-box{background:#fff;border:1px solid var(--border);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.ad-products h2,.contact-box h2{margin:0 0 8px;letter-spacing:-.03em}
.ad-products p,.contact-box p{margin:0;color:var(--muted)}
.contact-box{margin:0 0 60px;text-align:center}
.contact-box a{display:inline-flex;margin-top:12px;padding:12px 16px;border-radius:14px;background:var(--primary);color:#fff;font-weight:900}
@media (max-width:1020px){#ads .text-sponsor-grid{grid-template-columns:repeat(3,minmax(0,1fr))}#ads .partner-ad-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:920px){.tool-layout{grid-template-columns:1fr}.preview-card{position:static}.info-grid{grid-template-columns:1fr}.site-header{align-items:flex-start;flex-direction:column}.ad-products{grid-template-columns:1fr}.simple-steps{grid-template-columns:1fr}}
@media (max-width:640px){#ads .text-sponsor-grid,#ads .partner-ad-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#ads .bottom-banner-ad a{font-size:18px}#ads .partner-card{height:124px;grid-template-rows:92px 32px}#ads .text-sponsor-grid a{font-size:13px}}
@media (max-width:560px){.site-shell{width:min(100% - 24px,1120px)}.site-header{padding-top:18px}.top-nav{width:100%;justify-content:space-between;gap:10px;overflow-x:auto}.hero{padding-top:30px}.tool-card,.preview-card{padding:18px}.form-row{grid-template-columns:1fr}.btn,.download-btn{width:100%}.primary-options{align-items:flex-start;flex-direction:column}}

.legal-page{max-width:860px;margin:42px auto 70px;background:#fff;border:1px solid var(--border);border-radius:24px;padding:30px;box-shadow:var(--shadow)}
.legal-page h1{font-size:clamp(34px,5vw,54px);margin:0 0 12px;letter-spacing:-.05em}
.legal-page h2{font-size:20px;margin:26px 0 8px;letter-spacing:-.02em}
.legal-page p{color:var(--muted);margin:0 0 10px}
.legal-page a{color:var(--primary);font-weight:800}


/* V6 final polish */
.hero{padding:30px 0 24px}
.hero-subtitle{max-width:720px}
.upload-zone{min-height:232px}
.preset-section{display:block}
.preset-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.preset-btn{border:1px solid var(--border);background:#f8fafc;color:#334155;border-radius:13px;padding:10px 12px;font:inherit;font-size:13px;font-weight:900;cursor:pointer;text-align:center;transition:.16s ease}
.preset-btn:hover{border-color:#9bb7ff;background:#fff;color:var(--primary)}
.preset-btn.is-active{border-color:var(--primary);background:var(--soft);color:var(--primary);box-shadow:0 8px 20px rgba(36,87,255,.10)}
.usage-section{padding:0 0 58px}
.code-box{max-width:760px;margin:0 auto;background:#0f172a;color:#e2e8f0;border-radius:18px;padding:18px 20px;box-shadow:var(--shadow);overflow-x:auto;text-align:center}
.code-box code{font-family:Consolas,Monaco,"Courier New",monospace;font-size:15px;white-space:nowrap}
#ads .bottom-banner-ad a{font-size:24px}
@media (max-width:640px){
  .preset-row{grid-template-columns:1fr}
  .hero{padding-top:24px}
  #ads .bottom-banner-ad a{font-size:16px}
}