/* 方向 A「墨蓝·朱印」— 设计令牌 + 组件。无外链字体、无 CDN。 */
@font-face{font-family:"Loohcs Serif";src:url(/fonts/loohcs-serif-subset.woff2) format("woff2");font-weight:700;font-display:swap;unicode-range:U+4E00-9FFF,U+3000-303F,U+FF00-FFEF}
:root{
  --ink-950:#081221; --ink-900:#0C1A2E; --ink-800:#13253F; --ink-700:#1C3557; --ink-600:#2A4A73;
  --mist:#C9D3E0; --mist-2:#8FA0B6;
  --paper:#F6F3EC; --paper-2:#EDE7DB; --card:#FFFFFF; --line:#E2DBCC; --line-2:#D3CAB8;
  --text:#121C2B; --text-2:#475263; --text-3:#646B75;
  --seal:#B3361E; --seal-600:#962C18; --seal-50:#FBEDE8;
  --brass:#C9A45C; --brass-ink:#7A5A1E;
  --ok:#1E7350; --ok-50:#E6F2EC; --warn:#A8530A; --warn-50:#FBF0E2; --star:#C98A00;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","HarmonyOS_Sans_SC","MiSans","Noto Sans SC","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Iowan Old Style","Palatino Linotype","Book Antiqua",Georgia,"Loohcs Serif","Songti SC","Noto Serif SC","Noto Serif CJK SC","Source Han Serif SC","STSong",serif;
  --font-num:"SF Pro Display","DIN Alternate","Bahnschrift","Roboto",var(--font-sans);
  --r-s:8px; --r-m:14px; --r-l:22px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,26,46,.06),0 4px 14px rgba(12,26,46,.06);
  --sh-2:0 18px 48px -12px rgba(8,18,33,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{font-family:var(--font-sans);color:var(--text);background:var(--paper);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;font-feature-settings:"palt" 0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--brass);outline-offset:2px;border-radius:6px}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
svg.i{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.serif{font-family:var(--font-serif);font-weight:700;letter-spacing:-.01em}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3);font-weight:600}
.on-ink .eyebrow,.eyebrow.on-ink{color:var(--brass)}
.rule{height:1px;background:var(--line)}
/* 标识 */
.mark{width:36px;height:36px;border-radius:10px;background:var(--ink-900);display:grid;place-items:center;flex:none;position:relative;box-shadow:inset 0 0 0 1px rgba(201,164,92,.35)}
.mark b{font-family:Georgia,var(--font-serif);color:#F6F3EC;font-size:22px;line-height:1;font-weight:700;transform:translateX(-2px)}
.mark i{position:absolute;width:7px;height:7px;border-radius:2px;background:var(--seal);right:7px;bottom:8px}
.on-ink .mark{background:var(--paper)} .on-ink .mark b{color:var(--ink-900)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em}
.brand small{display:block;font-size:11px;font-weight:500;letter-spacing:.14em;color:var(--text-3)}
.on-ink .brand small{color:var(--mist-2)}
/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border-radius:var(--r-pill);border:1px solid var(--line-2);background:var(--card);font-weight:600;font-size:16px;cursor:pointer;white-space:nowrap;transition:transform .15s var(--ease),background .15s}
.btn:active{transform:scale(.98)}
.btn.ink{background:var(--ink-900);color:#fff;border-color:var(--ink-900)}
.btn.seal{background:var(--seal);color:#fff;border-color:var(--seal)}
.btn.ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.32)}
.btn.lg{height:56px;font-size:17px;padding:0 28px}
.btn.sm{height:40px;font-size:14px;padding:0 16px}
.btn.block{width:100%}
.btn.quiet{background:transparent;border-color:transparent;color:var(--text-2)}
/* 卡片与标签 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-1)}
.chip{white-space:nowrap;flex-shrink:0;display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;background:var(--paper-2);color:var(--text-2)}
.chip.live{background:var(--seal-50);color:var(--seal-600)}
.chip.live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--seal);box-shadow:0 0 0 3px rgba(179,54,30,.18)}
.chip.ok{background:var(--ok-50);color:var(--ok)} .chip.warn{background:var(--warn-50);color:var(--warn)}
.on-ink .chip{background:rgba(255,255,255,.08);color:var(--mist)}
.on-ink .chip.live{background:rgba(179,54,30,.22);color:#FFD9CF}
.switch{width:46px;height:28px;border-radius:999px;background:var(--line-2);position:relative;flex:none}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch.on{background:var(--ink-700)} .switch.on::after{left:21px}
/* 手机外壳（仅示意稿） */
.phone{width:390px;min-height:844px;margin:0 auto;position:relative;background:var(--paper);overflow:hidden}
.sb{height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 22px 0 28px;font-size:15px;font-weight:600;font-family:var(--font-num)}
.sb .r{display:flex;gap:6px;align-items:center} .sb .bat{width:24px;height:12px;border:1.5px solid currentColor;border-radius:3px;position:relative}.sb .bat::after{content:"";position:absolute;inset:1.5px 5px 1.5px 1.5px;background:currentColor;border-radius:1px}
.tabbar{position:absolute;left:0;right:0;bottom:0;height:84px;padding:8px 8px 26px;display:grid;grid-template-columns:repeat(var(--n,3),1fr);background:rgba(246,243,236,.92);backdrop-filter:blur(14px);border-top:1px solid var(--line)}
.tabbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:12px;color:var(--text-3);font-weight:600;position:relative}
.tabbar a.on{color:var(--ink-900)} .tabbar a.on svg{stroke:var(--seal)}
.tabbar a .dot{position:absolute;top:2px;right:calc(50% - 18px);width:8px;height:8px;border-radius:50%;background:var(--seal)}
.ink-tabbar{background:rgba(8,18,33,.94);border-top-color:rgba(255,255,255,.08)} .ink-tabbar a{color:var(--mist-2)} .ink-tabbar a.on{color:#fff} .ink-tabbar a.on svg{stroke:var(--brass)}
/* 示意课件（保留课件原深绿金气质，仅作缩略） */
.slide{aspect-ratio:16/9;border-radius:10px;background:radial-gradient(120% 90% at 70% 40%,#25443a,#0b1a15 70%);color:#EEE9D9;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:center;padding:6% 8%}
.slide em{font-style:normal;font-size:9px;letter-spacing:.2em;color:#d6b779}
.slide b{font-family:Georgia,serif;font-weight:400;font-size:22px;line-height:1.15;margin-top:4px}
.slide span{font-size:10px;opacity:.75;margin-top:6px}
.slide .pg{position:absolute;right:10px;bottom:8px;font-size:10px;opacity:.7}