:root {
  --navy:#1e3a8a; --navy-dark:#172554; --blue:#2563eb; --ink:#0f172a;
  --muted:#64748b; --line:#dbe4ef; --line-strong:#bac8da; --bg:#f8fafc;
  --card:#fff; --green:#166534; --green-bg:#f0fdf4; --red:#b42318;
  --red-bg:#fff1f0; --shadow:0 18px 45px rgba(15,23,42,.08); --radius:14px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;color:var(--ink);background:var(--bg);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}
a{color:var(--navy);text-underline-offset:3px}.container{width:min(1080px,calc(100% - 40px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}
.header-inner{min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{color:var(--ink);font-weight:850;letter-spacing:.045em;text-decoration:none}.brand-domain{color:var(--blue)}
.site-nav{display:flex;align-items:center;gap:24px}.site-nav a{color:#334155;font-size:.9rem;font-weight:600;text-decoration:none}.site-nav a[aria-current="page"]{color:var(--navy)}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;padding:7px 11px;border-radius:8px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:100;background:#fff;padding:10px}
.breadcrumb{padding-top:22px;color:var(--muted);font-size:.88rem}.hero{padding:34px 0 20px}.eyebrow{margin:0 0 4px;color:var(--blue);font-size:.76rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.hero h1{max-width:850px;margin:4px 0 8px;font-size:clamp(2rem,4.8vw,3.35rem);line-height:1.14;letter-spacing:-.045em}.hero p{max-width:780px;margin:0;color:#475569}.hero .hero-trust{margin-top:12px;color:var(--green);font-size:.92rem}
.editor-shell{margin:16px auto 48px;padding:clamp(20px,3vw,32px);background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.editor-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.editor-heading h2{margin:0;font-size:1.5rem}.editor-heading p{margin:3px 0 0;color:var(--muted);font-size:.9rem}.local-badge{flex:none;padding:5px 10px;color:var(--green);background:var(--green-bg);border:1px solid #d7eddf;border-radius:999px;font-size:.78rem;font-weight:800}
.editor-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:26px}.control-panel{border:1px solid var(--line);border-radius:12px;overflow:hidden}.control-section{padding:18px;border-bottom:1px solid var(--line)}.control-section:last-child{border-bottom:0}.control-section h3{display:flex;align-items:center;gap:9px;margin:0 0 13px;font-size:1rem}.control-section h3 span{display:inline-grid;place-items:center;width:25px;height:25px;color:#fff;background:var(--navy);border-radius:50%;font-size:.78rem}.control-section label:not(.upload-box):not(.toggle-row){display:block;margin:8px 0 5px;font-size:.87rem;font-weight:750}
.upload-box{display:grid;place-items:center;min-height:94px;padding:15px;text-align:center;background:#f8fafc;border:1.5px dashed #94a3b8;border-radius:10px;cursor:pointer}.upload-box:hover{background:#eff6ff;border-color:var(--blue)}.upload-box small{display:block;color:var(--muted);font-weight:400}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.control-input{width:100%;min-height:42px;padding:8px 10px;color:var(--ink);background:#fff;border:1px solid var(--line-strong);border-radius:8px}.control-input:focus,.button:focus-visible,.upload-box:focus-within{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.14)}.control-help{margin:7px 0 0;color:var(--muted);font-size:.8rem;line-height:1.5}.range-row{margin-top:11px}.range-row input{width:100%;accent-color:var(--navy)}.range-row output{float:right;color:var(--muted);font-weight:500}.toggle-row{display:flex;align-items:center;gap:8px;margin-top:11px;font-size:.88rem;font-weight:650}.toggle-row input{accent-color:var(--navy)}
.button{min-height:42px;padding:9px 13px;border:1px solid transparent;border-radius:8px;font-weight:750;cursor:pointer}.button:disabled{opacity:.45;cursor:not-allowed}.button-primary{color:#fff;background:var(--navy)}.button-primary:hover:not(:disabled){background:var(--navy-dark)}.button-secondary{color:var(--ink);background:#fff;border-color:var(--line-strong)}.button-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}.download-button{width:100%;margin-top:13px}
.canvas-panel{min-width:0}.empty-state{display:grid;place-items:center;align-content:center;min-height:520px;padding:30px;text-align:center;color:var(--muted);background:#f8fafc;border:1.5px dashed var(--line-strong);border-radius:12px}.empty-state strong{color:#334155}.empty-state p{max-width:430px;margin:.4em 0}.empty-icon{display:grid;place-items:center;width:58px;height:58px;margin-bottom:12px;color:var(--blue);background:#eff6ff;border-radius:50%;font-size:2rem}.canvas-wrap{overflow:auto;max-height:70vh;min-height:300px;padding:12px;background:#e2e8f0;border:1px solid var(--line-strong);border-radius:12px;touch-action:none}.canvas-wrap canvas{display:block;max-width:100%;height:auto;margin:auto;background:#fff;box-shadow:0 4px 18px rgba(15,23,42,.16);cursor:crosshair;touch-action:none}.canvas-instruction{margin:9px 0 0;color:var(--muted);font-size:.82rem;text-align:center}.notice{margin:16px 0 0;padding:11px 13px;border-radius:9px}.notice-error{color:var(--red);background:var(--red-bg);border-left:3px solid var(--red)}
.section{padding:36px 0}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.article-card{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.article-card h2{margin-top:0;font-size:1.3rem}.article-card li{margin:.4em 0}.caution-card{border-top:3px solid #ca8a04}.faq-section{max-width:880px}.faq-section h2{font-size:1.7rem}details{margin:10px 0;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:10px}summary{font-weight:750;cursor:pointer}
.site-footer{margin-top:50px;padding:40px 0 26px;color:#cbd5e1;background:var(--ink)}.site-footer a{color:#f8fafc}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px}.footer-maintained{color:#94a3b8;font-size:.82rem}
@media(max-width:860px){.editor-layout{grid-template-columns:1fr}.control-panel{display:grid;grid-template-columns:1fr 1fr}.control-section{border-right:1px solid var(--line)}.canvas-panel{grid-row:1}.empty-state{min-height:360px}}
@media(max-width:780px){.container{width:min(100% - 28px,1080px)}.header-inner{min-height:58px}.site-nav{display:none;position:absolute;top:58px;right:0;left:0;padding:15px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}.site-nav.is-open{display:flex}.menu-toggle{display:block}.hero{padding:25px 0 12px}.hero h1{font-size:clamp(1.85rem,9vw,2.65rem)}.editor-shell{padding:16px}.editor-heading{align-items:flex-start}.control-panel{display:block}.control-section{border-right:0}.grid-2,.footer-grid{grid-template-columns:1fr}.empty-state{min-height:300px}.canvas-wrap{padding:6px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}