/* 网站外壳：固定商务蓝，不随所选风格变（只有预览区变） */
:root{--bg:#f3f6fb;--panel:#ffffff;--text:#0f1e33;--muted:#5a6b82;--line:#dce4ef;--brand:#1f5fd1;--brand-d:#0b2a55;--soft:#eaf1fd;
 --font:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;color-scheme:light}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
button,a{touch-action:manipulation}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 12px;z-index:20}.skip:focus{left:8px}
.top{height:56px;display:flex;align-items:center;gap:24px;padding:0 20px;background:var(--brand-d);color:#fff}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;font-size:1.02rem}
.brand small{font-weight:500;opacity:.7;font-size:.8rem}
.mk{width:22px;height:22px;border-radius:5px;background:linear-gradient(135deg,#5b9cff,#22d3ee)}
.top-links{margin-left:auto;display:flex;gap:20px;font-size:.9rem}
.top-links a{color:rgba(255,255,255,.85);text-decoration:none}.top-links a:hover{color:#fff;text-decoration:underline}
.layout{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 56px)}
.side{background:var(--panel);border-right:1px solid var(--line);padding:16px 14px 40px;position:sticky;top:0;align-self:start;max-height:100vh;overflow:auto}
.side h2{font-size:.78rem;letter-spacing:.1em;color:var(--muted);margin:10px 6px 8px;font-weight:700}
.side h2 span{font-weight:500}
.grp{font-size:.72rem;color:var(--muted);margin:12px 8px 4px;letter-spacing:.06em}
.slist,.tlist{display:flex;flex-direction:column;gap:2px}
.it{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:6px 8px;border:1px solid transparent;border-radius:8px;background:transparent;font:inherit;color:var(--text);text-align:left;cursor:pointer}
.it:hover{background:#f4f7fc}
.it[aria-pressed="true"]{background:var(--soft);border-color:#bcd0f2}
.it[aria-pressed="true"] b{color:var(--brand)}
.it b{display:block;font-size:.93rem;font-weight:600;line-height:1.3}
.it small{display:block;color:var(--muted);font-size:.75rem;line-height:1.3}
.thumb{flex:none;width:52px;height:36px;border-radius:6px;border:1px solid var(--line);position:relative;overflow:hidden;background-size:cover;background-position:center}
.thumb i{position:absolute;bottom:5px;width:14px;height:6px;border-radius:2px}
.thumb i:nth-child(1){left:6px}.thumb i:nth-child(2){left:23px;width:8px}
.thumb em{position:absolute;left:6px;top:6px;width:24px;height:4px;border-radius:2px;opacity:.8}
.tnum{flex:none;width:28px;height:28px;border-radius:6px;display:grid;place-items:center;background:#eef2f8;color:var(--muted);font-size:.78rem;font-weight:700}
.it[aria-pressed="true"] .tnum{background:var(--brand);color:#fff}
.main{padding:16px 22px 40px;min-width:0}
.bar{display:flex;align-items:center;gap:14px;margin-bottom:12px;flex-wrap:wrap}
.now{font-size:1rem;min-width:0}.now b{font-size:1.1rem}.now .sep{margin:0 8px;color:var(--muted)}
.seg{display:inline-flex;margin-left:auto;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel)}
.seg button{min-height:38px;padding:0 16px;border:0;border-right:1px solid var(--line);background:transparent;font:inherit;font-size:.9rem;color:var(--muted);cursor:pointer}
.seg button:last-child{border-right:0}
.seg button[aria-pressed="true"]{background:var(--brand);color:#fff;font-weight:600}
.btn{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:var(--text);font:inherit;font-size:.9rem;text-decoration:none;cursor:pointer;white-space:nowrap}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.viewport{display:flex;justify-content:center}
.browser{background:#fff;border:1px solid #cdd8e8;border-radius:10px;overflow:hidden;box-shadow:0 1px 2px rgba(16,24,40,.06),0 12px 32px rgba(16,24,40,.10);max-width:100%}
.chrome{height:34px;display:flex;align-items:center;gap:6px;padding:0 12px;background:#eef2f8;border-bottom:1px solid #dce4ef}
.chrome i{width:10px;height:10px;border-radius:50%;background:#c9d3e2}
.url{margin-left:12px;flex:1;max-width:420px;height:22px;border-radius:6px;background:#fff;border:1px solid #dce4ef;font-size:.75rem;color:var(--muted);display:flex;align-items:center;padding:0 10px;overflow:hidden;white-space:nowrap}
.screen{position:relative;overflow:hidden;background:#fff}
.screen iframe{position:absolute;left:0;top:0;border:0;transform-origin:0 0;background:#fff}
.spec{display:flex;gap:18px;align-items:flex-start;justify-content:space-between;margin-top:16px;padding:16px 18px;background:var(--panel);border:1px solid var(--line);border-radius:10px;flex-wrap:wrap}
.spec-l{min-width:0;flex:1}
.note{margin:0 0 10px;color:var(--muted);font-size:.92rem}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:flex;align-items:center;gap:8px;padding:4px 10px 4px 4px;border:1px solid var(--line);border-radius:8px;font-size:.78rem;background:#fff}
.chip i{width:24px;height:24px;border-radius:5px;border:1px solid rgba(0,0,0,.08)}
.chip code{font-size:.78rem}.chip span{color:var(--muted)}
.spec-r{display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.msg{font-size:.82rem;color:#15803d;min-height:1.2em}
.help{margin-top:22px;padding:20px 22px;background:var(--panel);border:1px solid var(--line);border-top:3px solid var(--brand);border-radius:10px}
.help h2{font-size:1.1rem;margin:0 0 10px;color:var(--brand-d)}
.help ol{margin:0 0 10px;padding-left:1.3em;display:grid;gap:6px}
.help b{margin-right:8px}
.muted{color:var(--muted);font-size:.85rem}
@media(max-width:900px){
 .layout{grid-template-columns:minmax(0,1fr)}
 .side{position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line);padding:10px 12px}
 .slist,.tlist{flex-direction:row;overflow-x:auto;gap:6px;padding-bottom:6px;scroll-snap-type:x proximity}
 .slist .grp{display:none}
 .it{flex:none;width:auto;min-width:150px;scroll-snap-align:start;border-color:var(--line)}
 .main{padding:12px}
 .seg{margin-left:0}
 .top-links{gap:12px;font-size:.82rem}.brand small{display:none}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}