:root{--bg:#0C1120;--card:#131B2E;--card2:#182238;--txt:#E6EDF6;--mut:#94A3B8;--acc:#0891B2;--acc2:#22D3EE;--gold:#FDE047}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font:16px/1.65 -apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:inherit;text-decoration:none}
.nav{position:sticky;top:0;z-index:20;background:rgba(12,17,32,.93);backdrop-filter:blur(8px);border-bottom:1px solid #1E293B}
.nav-in{max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:18px;padding:12px 20px;overflow-x:auto}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px;white-space:nowrap}
.nav-links{display:flex;gap:14px;font-size:13.5px;color:var(--mut);overflow-x:auto}
.nav-links a:hover{color:var(--txt)}
.wrap{max-width:1100px;margin:0 auto;padding:28px 20px}.wrap.narrow{max-width:780px}
.crumbs{font-size:13px;color:var(--mut);margin-bottom:14px}.crumbs span{margin:0 6px}
h1{font-size:34px;line-height:1.2;margin:10px 0 8px}h2{font-size:23px;margin:34px 0 12px}h3{font-size:17.5px;margin:20px 0 6px}
.lead{color:var(--mut);font-size:17px;max-width:660px}
.prose-p{color:#C7D3E4;margin:10px 0;max-width:760px}
.tool-hero{display:flex;gap:28px;align-items:center;flex-wrap:wrap;margin-top:6px}
.tool-hero img{flex:0 0 290px;max-width:100%}
.hint{color:var(--gold);font-size:14px;margin-top:10px}
.btn{display:inline-block;background:var(--acc);color:#fff;font-weight:700;padding:10px 20px;border-radius:10px;border:none;cursor:pointer;font-size:15px;transition:transform .15s, background .15s}
.btn:hover{background:#0EA5E9}.btn:active{transform:scale(.97)}
.btn.big{font-size:17px;padding:13px 26px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(225px,1fr));gap:16px}
.hcard{background:var(--card);border:1px solid #1E293B;border-radius:14px;overflow:hidden;transition:transform .18s, border-color .18s}
.hcard:hover{transform:translateY(-3px);border-color:var(--acc)}
.hcard img{display:block;width:100%;height:auto}
.hc-body{padding:12px 14px}.hc-name{font-weight:700;font-size:15px}
.hc-date{color:var(--acc2);font-size:13px;margin-top:2px}
.faq h3{margin:16px 0 6px}.faq p{margin:0 0 10px;color:var(--mut)}
.pn-row{display:flex;justify-content:space-between;gap:12px;margin:34px 0 8px;flex-wrap:wrap}
.pn{background:var(--card);border:1px solid #1E293B;border-radius:10px;padding:10px 16px;font-weight:600;font-size:14px}
.pn:hover{border-color:var(--acc)}
.rel{margin-top:26px}.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--card);border:1px solid #1E293B;border-radius:999px;padding:6px 14px;font-size:13.5px;color:#C7D3E4}
.chip:hover{border-color:var(--acc);color:#fff}
.why{margin-top:44px}.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.why-grid div{background:var(--card);border:1px solid #1E293B;border-radius:14px;padding:18px}
.why-grid h3{margin:0 0 6px}.why-grid p{color:var(--mut);margin:0;font-size:14.5px}
.site{border-top:1px solid #1E293B;margin-top:60px;background:#0A0F1D}
.foot-in{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:22px;padding:34px 20px}
.foot-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--mut);margin:0 0 10px}
.foot-col a{display:block;font-size:14px;color:#9FB0CB;padding:3px 0}.foot-col a:hover{color:#fff}
.foot-base{border-top:1px solid #1B2437;padding:14px 20px;text-align:center;color:#5D6A87;font-size:12.5px}
#fs-overlay{position:fixed;inset:0;z-index:9999;background:#000;cursor:pointer}
#fs-hint{position:absolute;top:18px;left:50%;transform:translateX(-50%);color:#64748B;font:13px/1.4 -apple-system,"Segoe UI",Roboto,sans-serif;background:rgba(0,0,0,.55);padding:6px 14px;border-radius:8px;pointer-events:none;transition:opacity .4s;max-width:92vw;text-align:center}
/* 全屏内浮动控制条：色板/切色/Exit —— 触屏与键盘同等可退（UED 30 条：fixed 定位零布局位移） */
#fs-dock{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:10px;
background:rgba(2,6,16,.72);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.18);
border-radius:999px;padding:8px 12px;z-index:10000;opacity:.5;transition:opacity .45s;max-width:94vw}
#fs-dock.fs-dock-lit{opacity:1}
.fs-dock-btn{height:40px;min-width:40px;border-radius:999px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.08);
color:#fff;font:700 13.5px -apple-system,"Segoe UI",Roboto,sans-serif;cursor:pointer;display:flex;align-items:center;justify-content:center;
gap:7px;padding:0 12px;transition:background .15s, transform .1s}
.fs-dock-btn:hover{background:rgba(255,255,255,.24)}
.fs-dock-btn:active{transform:scale(.94)}
.fs-dock-btn:focus-visible{outline:2px solid #fff;outline-offset:2px}
.fs-swatch{width:26px;height:26px;border-radius:8px;border:2px solid rgba(255,255,255,.4);cursor:pointer;padding:0;
transition:transform .12s, border-color .15s, box-shadow .15s}
.fs-swatch:hover{transform:translateY(-2px);border-color:#fff}
.fs-swatch:active{transform:scale(.9)}
.fs-swatch:focus-visible{outline:2px solid #fff;outline-offset:2px}
.fs-swatch[aria-pressed="true"]{border-color:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.4)}
.fs-dock-sep{width:1px;height:24px;background:rgba(255,255,255,.22)}
#fs-dock-swatches{display:flex;gap:7px;align-items:center}
@media(max-width:640px){#fs-dock{bottom:12px;gap:7px;padding:6px 9px}.fs-swatch{width:23px;height:23px}.fs-dock-btn{height:38px;min-width:38px}}
/* 首页快捷色板：一击全屏开测到指定颜色 */
.swatch-row{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;align-items:center}
.qswatch{width:44px;height:44px;border-radius:12px;border:1px solid #334155;cursor:pointer;padding:0;
transition:transform .15s, border-color .15s, box-shadow .15s}
.qswatch:hover{transform:translateY(-3px);border-color:var(--acc2);box-shadow:0 4px 14px rgba(34,211,238,.25)}
.qswatch:active{transform:scale(.93)}
.qswatch:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
.swatch-label{font-size:13px;color:var(--mut);width:100%;margin:0}
@media(max-width:640px){h1{font-size:27px}.tool-hero img{flex-basis:100%}}