/* aaronlau.me blog — AI System 6 外皮。
   物件语法取自 AI System 6（apps/desktop/styles/00-foundation.css、65-*）：
   菜单栏、条纹标题栏、1px 黑框加 1px 投影、白底标签的桌面图标。
   阅读面（正文、表格、代码）不压成 1988 年的密度。 */

@font-face {
  font-family: Chicago;
  src: url("fonts/ChicagoFLF.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: Chicago_12;
  src: url("fonts/ChiKareGo2.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: Monaco;
  src: url("fonts/monaco.woff2") format("woff2");
  font-display: swap;
}

@font-face {
  font-family: "Platinum Asap";
  src: url("fonts/asap/Asap-Variable.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-stretch: 75% 125%;
  font-display: swap;
}

/* ---------- 外皮 tokens ---------- */
:root,
:root[data-skin="system6"] {
  color-scheme: light;
  --desk-color: #b6b6b6;
  --desk:
    radial-gradient(rgba(0, 0, 0, .28) .7px, transparent .85px) 0 0 / 8px 8px,
    radial-gradient(rgba(255, 255, 255, .16) .6px, transparent .75px) 4px 4px / 8px 8px,
    #b6b6b6;
  --paper: #ffffff;
  --ink: #000000;
  --muted: #4a4a4a;
  --rule: #000000;
  --soft-rule: #8a8a8a;
  --tint: #f2f2f2;
  --menubar-bg: #ffffff;
  --menubar-border: #000000;
  --win-frame: #ffffff;
  --win-border: #000000;
  --win-shadow: 1px 1px 0 #000000;
  --title-bg: #ffffff;
  --title-stripes: repeating-linear-gradient(to bottom, #000 0 1px, transparent 1px 2px);
  --title-label-bg: #ffffff;
  --title-fg: #000000;
  --title-inset: none;
  --status-bg: #ffffff;
  --sel-bg: #000000;
  --sel-fg: #ffffff;
  --label-bg: #ffffff;
  --label-fg: #000000;
  --btn-bg: #ffffff;
  --btn-radius: 6px;
  --btn-shadow: none;
  --hit-bg: #000000; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #000000;
  --icon-filter: none;
  --chrome-font: Chicago, ChicagoFLF, Charcoal, -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 700;
  --chrome-stretch: normal;
}
:root[data-skin="system6"][data-mode="dark"],
:root:not([data-skin])[data-mode="dark"] {
  color-scheme: dark;
  --desk-color: #1d1d1d;
  --desk:
    radial-gradient(rgba(255, 255, 255, .16) .7px, transparent .85px) 0 0 / 8px 8px,
    #1d1d1d;
  --paper: #111111;
  --ink: #ececec;
  --muted: #b4b4b4;
  --rule: #ececec;
  --soft-rule: #6a6a6a;
  --tint: #1e1e1e;
  --menubar-bg: #111111;
  --menubar-border: #ececec;
  --win-frame: #111111;
  --win-border: #ececec;
  --win-shadow: 1px 1px 0 #000000;
  --title-bg: #111111;
  --title-stripes: repeating-linear-gradient(to bottom, #ececec 0 1px, transparent 1px 2px);
  --title-label-bg: #111111;
  --title-fg: #ececec;
  --status-bg: #111111;
  --sel-bg: #ececec;
  --sel-fg: #111111;
  --label-bg: #111111;
  --label-fg: #ececec;
  --btn-bg: #111111;
  --hit-bg: #ececec; --hit-fg: #111111;
  --miss-bg: #111111; --miss-fg: #ececec;
  --icon-filter: invert(1);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-mode]) {
    color-scheme: dark;
    --desk: radial-gradient(rgba(255, 255, 255, .16) .7px, transparent .85px) 0 0 / 8px 8px, #1d1d1d;
    --paper: #111111; --ink: #ececec; --muted: #b4b4b4; --rule: #ececec; --soft-rule: #6a6a6a; --tint: #1e1e1e;
    --menubar-bg: #111111; --menubar-border: #ececec; --win-frame: #111111; --win-border: #ececec; --win-shadow: 1px 1px 0 #000;
    --title-bg: #111111; --title-stripes: repeating-linear-gradient(to bottom, #ececec 0 1px, transparent 1px 2px);
    --title-label-bg: #111111; --title-fg: #ececec; --status-bg: #111111; --sel-bg: #ececec; --sel-fg: #111111;
    --label-bg: #111111; --label-fg: #ececec; --btn-bg: #111111; --hit-bg: #ececec; --hit-fg: #111111; --miss-bg: #111111; --miss-fg: #ececec;
    --icon-filter: invert(1);
  }
}

/* System 7：#eeeeee 标题列上六条 #777777 细线，薰衣草色内缘；50% 灰点阵桌面。 */
:root[data-skin="system7"] {
  color-scheme: light;
  --desk-color: #8a8a8a;
  --desk: repeating-conic-gradient(#7a7a7a 0 25%, #a0a0a0 0 50%) 0 0 / 2px 2px;
  --paper: #ffffff;
  --ink: #000000;
  --muted: #4a4a4a;
  --rule: #000000;
  --soft-rule: #999999;
  --tint: #eeeeee;
  --menubar-bg: #ffffff;
  --menubar-border: #000000;
  --win-frame: #eeeeee;
  --win-border: #000000;
  --win-shadow: 1px 1px 0 #000000;
  --title-bg: #eeeeee;
  --title-stripes: repeating-linear-gradient(to bottom, #777777 0 1px, transparent 1px 2px);
  --title-label-bg: #eeeeee;
  --title-fg: #000000;
  --title-inset: inset 1px 1px 0 #ccccff, inset -1px -1px 0 #9999cc;
  --status-bg: #eeeeee;
  --sel-bg: #ccccff;
  --sel-fg: #000000;
  --label-bg: #ffffff;
  --label-fg: #000000;
  --btn-bg: #eeeeee;
  --btn-radius: 6px;
  --btn-shadow: inset -1px -1px 0 #999999, inset 1px 1px 0 #ffffff;
  --hit-bg: #333366; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #000000;
  --icon-filter: none;
}
:root[data-skin="system7"][data-mode="dark"] {
  color-scheme: dark;
  --desk-color: #2b2b33;
  --desk: repeating-conic-gradient(#26262d 0 25%, #303039 0 50%) 0 0 / 2px 2px;
  --paper: #18181c;
  --ink: #ebebf2;
  --muted: #b3b3c0;
  --rule: #8a8aa0;
  --soft-rule: #55556a;
  --tint: #23232a;
  --menubar-bg: #18181c;
  --menubar-border: #8a8aa0;
  --win-frame: #26262e;
  --win-border: #000000;
  --win-shadow: 1px 1px 0 #000000;
  --title-bg: #2c2c36;
  --title-stripes: repeating-linear-gradient(to bottom, #55556a 0 1px, transparent 1px 2px);
  --title-label-bg: #2c2c36;
  --title-fg: #ebebf2;
  --title-inset: inset 1px 1px 0 #3d3d55, inset -1px -1px 0 #15151c;
  --status-bg: #26262e;
  --sel-bg: #4a4a80;
  --sel-fg: #ffffff;
  --label-bg: #18181c;
  --label-fg: #ebebf2;
  --btn-bg: #2c2c36;
  --btn-shadow: inset -1px -1px 0 #15151c, inset 1px 1px 0 #3d3d55;
  --hit-bg: #ccccff; --hit-fg: #18181c;
  --miss-bg: #18181c; --miss-fg: #ebebf2;
}

/* Platinum（Mac OS 8/9）：#cccccc 框、斜面阴影、白／#777 细纹标题列，Asap 代替 Charcoal。 */
:root[data-skin="platinum"] {
  color-scheme: light;
  --desk-color: #4a71ab;
  --desk: url("azul-tile.png") left top / 96px 96px repeat, #4a71ab;
  --paper: #ffffff;
  --ink: #000000;
  --muted: #444444;
  --rule: #888888;
  --soft-rule: #aaaaaa;
  --tint: #eeeeee;
  --menubar-bg: linear-gradient(#eeeeee, #dddddd);
  --menubar-border: #000000;
  --win-frame: #dddddd;
  --win-border: #000000;
  --win-shadow: 1px 1px 0 #000000, inset 1px 1px 0 #ffffff, inset -1px -1px 0 #999999;
  --title-bg: #cccccc;
  --title-stripes: repeating-linear-gradient(to bottom, #ffffff 0 1px, #888888 1px 2px);
  --title-label-bg: #cccccc;
  --title-fg: #000000;
  --title-inset: inset 1px 1px 0 #eeeeee, inset -1px -1px 0 #999999;
  --status-bg: #dddddd;
  --sel-bg: #ccccff;
  --sel-fg: #000000;
  --label-bg: #ffffff;
  --label-fg: #000000;
  --btn-bg: linear-gradient(#f4f4f4, #dddddd);
  --btn-radius: 4px;
  --btn-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #999999;
  --hit-bg: #31507f; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #000000;
  --icon-filter: none;
  --chrome-font: Charcoal, "Platinum Asap", -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: 113%;
}
:root[data-skin="platinum"][data-mode="dark"] {
  color-scheme: dark;
  --desk-color: #172235;
  --desk: linear-gradient(rgba(10, 18, 32, .78), rgba(10, 18, 32, .78)), url("azul-tile.png") left top / 96px 96px repeat, #172235;
  --paper: #1b1b1b;
  --ink: #eaeaea;
  --muted: #b5b5b5;
  --rule: #6c6c6c;
  --soft-rule: #4c4c4c;
  --tint: #262626;
  --menubar-bg: linear-gradient(#3a3a3a, #2e2e2e);
  --menubar-border: #000000;
  --win-frame: #333333;
  --win-border: #000000;
  --win-shadow: 1px 1px 0 #000000, inset 1px 1px 0 #4a4a4a, inset -1px -1px 0 #222222;
  --tbox-a: #555555; --tbox-b: #2a2a2a; --tbox-hi: #666666; --tbox-lo: #222222; --tbox-ring: #ececec;
  --title-bg: #3a3a3a;
  --title-stripes: repeating-linear-gradient(to bottom, #555555 0 1px, #2a2a2a 1px 2px);
  --title-label-bg: #3a3a3a;
  --title-fg: #eaeaea;
  --title-inset: inset 1px 1px 0 #4a4a4a, inset -1px -1px 0 #222222;
  --status-bg: #333333;
  --sel-bg: #4a5a8a;
  --sel-fg: #ffffff;
  --label-bg: #1b1b1b;
  --label-fg: #eaeaea;
  --btn-bg: linear-gradient(#444444, #333333);
  --btn-shadow: inset 1px 1px 0 #555555, inset -1px -1px 0 #222222;
  --hit-bg: #9fb6e0; --hit-fg: #111111;
  --miss-bg: #1b1b1b; --miss-fg: #eaeaea;
}


/* Drawing Board（Mac OS 8.5 beta）：Platinum 的控件画在草图纸上。 */
:root[data-skin="drawing-board"] {
  color-scheme: light;
  --desk-color: #958671;
  --desk:
    repeating-linear-gradient(0deg, rgba(43,36,28,.05) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, rgba(43,36,28,.035) 0 1px, transparent 1px 5px),
    #958671;
  --paper: #f5eee3;
  --ink: #2b241c;
  --muted: #6b5f50;
  --rule: #857765;
  --soft-rule: #b7a995;
  --tint: #ece5da;
  --menubar-bg: #e5dbcd;
  --menubar-border: #574c41;
  --win-frame: #e2dacf;
  --win-border: #857765;
  --win-shadow: none;
  --title-bg: #e0d9cf;
  --title-stripes: repeating-linear-gradient(135deg, rgba(43,36,28,.2) 0 1px, transparent 1px 4px);
  --title-label-bg: #e0d9cf;
  --title-fg: #2b241c;
  --title-inset: inset 0 1px 0 #f4efe7;
  --status-bg: #e7e3de;
  --sel-bg: #fffcdf;
  --sel-fg: #2b241c;
  --label-bg: #f5eee3;
  --label-fg: #2b241c;
  --btn-bg: #e7e3de;
  --btn-radius: 2px;
  --btn-shadow: inset 1px 1px 0 #f4efe7, inset -1px -1px 0 #958671;
  --hit-bg: #574c41; --hit-fg: #f4efe7;
  --miss-bg: #f5eee3; --miss-fg: #2b241c;
  --icon-filter: none;
  --chrome-font: "Platinum Asap", Charcoal, -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: 113%;
}

/* Aqua（Mac OS X 10.0–10.4）：条纹标题栏、蓝宝石桌面、胶囊按钮。 */
:root[data-skin="aqua"] {
  color-scheme: light;
  --desk-color: #4a7ab4;
  --desk:
    radial-gradient(90% 55% at 18% 6%, rgba(255,255,255,.52), transparent 42%),
    radial-gradient(40% 22% at 34% 28%, rgba(220,240,255,.35), transparent 55%),
    linear-gradient(#4f86c6, #2b5c99);
  --paper: #ffffff;
  --ink: #171717;
  --muted: #4a4a4a;
  --rule: #a5a5a5;
  --soft-rule: #cfcfcf;
  --tint: #f2f2f2;
  --menubar-bg: repeating-linear-gradient(to bottom, #fafafa 0 1px, #fff 1px 2px, #fafafa 2px 3px, #e9e9e9 3px 4px);
  --menubar-border: #8a8a8a;
  --win-frame: #f1f1f1;
  --win-border: #a5a5a5;
  --win-shadow: 0 1px 0 rgba(0,0,0,.35), 0 2px 3px rgba(0,0,0,.32), 0 5px 10px rgba(0,0,0,.22);
  --title-bg: #f1f1f1;
  --title-stripes: repeating-linear-gradient(to bottom, #fafafa 0 1px, #fff 1px 2px, #f3f3f3 2px 3px, #e9e9e9 3px 4px);
  --title-label-bg: transparent;
  --title-fg: #171717;
  --title-inset: inset 0 1px 0 #fff;
  --status-bg: #f1f1f1;
  --sel-bg: #3479d4;
  --sel-fg: #ffffff;
  --label-bg: #ffffff;
  --label-fg: #171717;
  --btn-bg: linear-gradient(#ffffff, #f0f0f0);
  --btn-radius: 12px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(0,0,0,.2);
  --hit-bg: #3479d4; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #171717;
  --icon-filter: none;
  --chrome-font: "Lucida Grande", "Lucida Sans Unicode", "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: normal;
}

/* Tiger（10.4）：拉丝金属菜单栏、圆底窗口。 */
:root[data-skin="tiger"] {
  color-scheme: light;
  --desk-color: #4a7ab4;
  --desk:
    radial-gradient(90% 55% at 20% 8%, rgba(255,255,255,.36), transparent 42%),
    radial-gradient(65% 38% at 78% 80%, rgba(50,95,148,.32), transparent 55%),
    linear-gradient(#4a7ab4, #2f5a8c);
  --paper: #ffffff;
  --ink: #1a1a1a;
  --muted: #4a4a4a;
  --rule: #8a8a8a;
  --soft-rule: #c6c6c6;
  --tint: #f1f1f1;
  --menubar-bg:
    repeating-linear-gradient(90deg, rgba(255,255,255,.24) 0 1px, transparent 1px 2px),
    linear-gradient(#c8ccd2, #b8bdc4 45%, #aeb3ba);
  --menubar-border: #7d838a;
  --win-frame: #ececec;
  --win-border: #8a8a8a;
  --win-shadow: 0 1px 1px rgba(0,0,0,.25), 0 3px 8px rgba(0,0,0,.18);
  --title-bg: #d9d9d9;
  --title-stripes: repeating-linear-gradient(to bottom, #f9f9f9 0 1px, #e6e6e6 1px 3px, #d7d7d7 3px 5px);
  --title-label-bg: transparent;
  --title-fg: #1a1a1a;
  --title-inset: inset 0 1px 0 #fff;
  --status-bg: #ececec;
  --sel-bg: #3479d4;
  --sel-fg: #ffffff;
  --label-bg: #ffffff;
  --label-fg: #1a1a1a;
  --btn-bg: linear-gradient(#f7f7f7, #e4e4e4);
  --btn-radius: 10px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(0,0,0,.2);
  --hit-bg: #3479d4; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #1a1a1a;
  --icon-filter: none;
  --chrome-font: "Lucida Grande", "Lucida Sans Unicode", "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: normal;
}

/* Snow Leopard（10.6）：灰蓝标题梯、紫色星空桌面。 */
:root[data-skin="snow-leopard"] {
  color-scheme: light;
  --desk-color: #471858;
  --desk:
    radial-gradient(ellipse 55% 22% at 42% 8%, rgba(255,235,250,.55), transparent 55%),
    radial-gradient(ellipse 70% 32% at 28% 14%, rgba(255,220,245,.45), transparent 58%),
    linear-gradient(#471858, #2a0e36);
  --paper: #ffffff;
  --ink: #1f1f1f;
  --muted: #4a4a4a;
  --rule: #b5b5b5;
  --soft-rule: #d2d2d2;
  --tint: #ededed;
  --menubar-bg: linear-gradient(#f6f6f6, #d4d4d4);
  --menubar-border: #8a8a8a;
  --win-frame: #ededed;
  --win-border: #b5b5b5;
  --win-shadow: 0 1px 1px rgba(0,0,0,.28), 0 4px 10px rgba(0,0,0,.22), 0 8px 16px rgba(0,0,0,.14);
  --title-bg: #d0d0d0;
  --title-stripes: linear-gradient(to bottom, #e2e2e2 0 1px, #d0d0d0 1px 3px, #bcbcbc 3px 5px);
  --title-label-bg: transparent;
  --title-fg: #1f1f1f;
  --title-inset: inset 0 1px 0 #fff;
  --status-bg: #ededed;
  --sel-bg: #3766f2;
  --sel-fg: #ffffff;
  --label-bg: #ffffff;
  --label-fg: #1f1f1f;
  --btn-bg: linear-gradient(#ffffff, #e8e8e8);
  --btn-radius: 8px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(0,0,0,.2);
  --hit-bg: #3766f2; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #1f1f1f;
  --icon-filter: none;
  --chrome-font: "Lucida Grande", "Lucida Sans Unicode", "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: normal;
}

/* Lion（10.7）：深蓝星空、单色来源列表、灰阶标题。 */
:root[data-skin="lion"] {
  color-scheme: light;
  --desk-color: #1d3a64;
  --desk:
    radial-gradient(ellipse 13% 9% at 47% 46%, #fff4e4, rgba(240,208,180,.55) 35%, transparent 100%),
    radial-gradient(ellipse 28% 10% at 48% 4%, rgba(160,190,230,.35), transparent 100%),
    linear-gradient(#1d3a64, #0a1a33);
  --paper: #ffffff;
  --ink: #1f1f1f;
  --muted: #4a4a4a;
  --rule: #b5b5b5;
  --soft-rule: #d2d2d2;
  --tint: #ededed;
  --menubar-bg: linear-gradient(rgba(242,244,248,.94) 0 1px, rgba(240,244,248,.9) 1px, rgba(168,171,177,.9));
  --menubar-border: #8a8a8a;
  --win-frame: #ededed;
  --win-border: #b5b5b5;
  --win-shadow: 0 1px 1px rgba(0,0,0,.22), 0 3px 8px rgba(0,0,0,.18), 0 7px 14px rgba(0,0,0,.12);
  --title-bg: #dcdcdc;
  --title-stripes: linear-gradient(to bottom, #f1f1f1 0 1px, #dcdcdc 1px 4px, #c0c0c0 4px 6px);
  --title-label-bg: transparent;
  --title-fg: #1f1f1f;
  --title-inset: inset 0 1px 0 #fff;
  --status-bg: #ededed;
  --sel-bg: #3479d4;
  --sel-fg: #ffffff;
  --label-bg: #ffffff;
  --label-fg: #1f1f1f;
  --btn-bg: linear-gradient(#ffffff, #e6e6e6);
  --btn-radius: 8px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(0,0,0,.2);
  --hit-bg: #3479d4; --hit-fg: #ffffff;
  --miss-bg: #ffffff; --miss-fg: #1f1f1f;
  --icon-filter: none;
  --chrome-font: "Lucida Grande", "Lucida Sans Unicode", "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", sans-serif;
  --chrome-weight: 600;
  --chrome-stretch: normal;
}

/* Yosemite（10.10）：半透明工具栏、Helvetica Neue、扁平控件。 */
:root[data-skin="yosemite"] {
  color-scheme: light;
  --desk-color: #464955;
  --desk:
    radial-gradient(ellipse 55% 18% at 50% 0%, rgba(255,242,228,.85), transparent 60%),
    radial-gradient(ellipse 70% 28% at 50% 6%, rgba(255,220,198,.72), transparent 55%),
    linear-gradient(#464955, #2b2d35);
  --paper: #f5f5f5;
  --ink: #242424;
  --muted: #5a5a5a;
  --rule: rgba(0,0,0,.11);
  --soft-rule: rgba(0,0,0,.08);
  --tint: #ececec;
  --menubar-bg: rgba(245,245,247,.88);
  --menubar-border: rgba(0,0,0,.12);
  --win-frame: #f5f5f5;
  --win-border: rgba(0,0,0,.12);
  --win-shadow: 0 5px 5px rgba(0,0,0,.18), 0 8px 15px rgba(0,0,0,.14), 0 0 0 1px rgba(0,0,0,.08);
  --title-bg: #ececec;
  --title-stripes: linear-gradient(#f5f5f5 0%, #e9e9e9 10%, #e2e2e2 52%, #d2d2d2 100%);
  --title-label-bg: transparent;
  --title-fg: #242424;
  --title-inset: inset 0 1px 0 rgba(255,255,255,.8);
  --status-bg: #ececec;
  --sel-bg: #116cd6;
  --sel-fg: #ffffff;
  --label-bg: #f5f5f5;
  --label-fg: #242424;
  --btn-bg: linear-gradient(#ffffff, #f1f1f1);
  --btn-radius: 5px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 1px rgba(0,0,0,.06);
  --hit-bg: #116cd6; --hit-fg: #ffffff;
  --miss-bg: #f5f5f5; --miss-fg: #242424;
  --icon-filter: none;
  --chrome-font: "Helvetica Neue", Helvetica, "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", sans-serif;
  --chrome-weight: 500;
  --chrome-stretch: normal;
}

/* Big Sur（11）：圆角、半透明菜单栏、彩色渐变桌面。 */
:root[data-skin="big-sur"] {
  color-scheme: light;
  --desk-color: #183465;
  --desk:
    radial-gradient(ellipse 55% 40% at 88% 8%, #ffd7b0 0%, #fa9376 32%, transparent 58%),
    radial-gradient(ellipse 48% 36% at 8% -2%, #ff6b8a 0%, #ed5372 22%, transparent 55%),
    linear-gradient(#183465, #0e2145);
  --paper: #f7f1f1;
  --ink: #242424;
  --muted: #5a5a5a;
  --rule: rgba(0,0,0,.15);
  --soft-rule: rgba(0,0,0,.1);
  --tint: #efe6e3;
  --menubar-bg: rgba(250,244,238,.64);
  --menubar-border: rgba(0,0,0,.08);
  --win-frame: #f7f1f1;
  --win-border: rgba(0,0,0,.15);
  --win-shadow: 0 18px 42px rgba(0,0,0,.27), 0 0 0 .5px rgba(255,255,255,.6);
  --title-bg: #f3e9e4;
  --title-stripes: linear-gradient(#fbf6f3, #eadfd9);
  --title-label-bg: transparent;
  --title-fg: #242424;
  --title-inset: inset 0 1px 0 rgba(255,255,255,.7);
  --status-bg: #f3e9e4;
  --sel-bg: #0069d9;
  --sel-fg: #ffffff;
  --label-bg: #f7f1f1;
  --label-fg: #242424;
  --btn-bg: linear-gradient(#ffffff, #f4eae6);
  --btn-radius: 7px;
  --btn-shadow: inset 0 1px 0 #fff, 0 1px 2px rgba(0,0,0,.08);
  --hit-bg: #0069d9; --hit-fg: #ffffff;
  --miss-bg: #f7f1f1; --miss-fg: #242424;
  --icon-filter: none;
  --chrome-font: "SF Pro Text", "Helvetica Neue", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 500;
  --chrome-stretch: normal;
}

/* Liquid Glass（26）：玻璃层、圆角、背景模糊。 */
:root[data-skin="liquid-glass"] {
  color-scheme: light;
  --desk-color: #dce2e6;
  --desk:
    radial-gradient(120% 80% at 12% 0%, #ffffff 0%, transparent 45%),
    radial-gradient(90% 70% at 85% 15%, #d7e6f2 0%, transparent 50%),
    linear-gradient(#dce2e6, #b9c6d0);
  --paper: rgba(255,255,255,.78);
  --ink: #101114;
  --muted: #4a4f55;
  --rule: rgba(0,0,0,.14);
  --soft-rule: rgba(0,0,0,.08);
  --tint: rgba(255,255,255,.4);
  --menubar-bg: linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.22));
  --menubar-border: rgba(255,255,255,.65);
  --win-frame: rgba(255,255,255,.55);
  --win-border: rgba(255,255,255,.72);
  --win-shadow: 0 18px 42px rgba(0,0,0,.18), 0 0 0 .5px rgba(255,255,255,.7);
  --title-bg: rgba(255,255,255,.35);
  --title-stripes: linear-gradient(180deg, rgba(255,255,255,.7), rgba(255,255,255,.25));
  --title-label-bg: transparent;
  --title-fg: #101114;
  --title-inset: inset 0 1px 0 rgba(255,255,255,.8);
  --status-bg: rgba(255,255,255,.35);
  --sel-bg: #0071e3;
  --sel-fg: #ffffff;
  --label-bg: rgba(255,255,255,.65);
  --label-fg: #101114;
  --btn-bg: rgba(255,255,255,.55);
  --btn-radius: 10px;
  --btn-shadow: inset 0 1px 0 rgba(255,255,255,.9), 0 1px 2px rgba(0,0,0,.08);
  --hit-bg: #0071e3; --hit-fg: #ffffff;
  --miss-bg: rgba(255,255,255,.62); --miss-fg: #101114;
  --icon-filter: none;
  --chrome-font: "SF Pro Text", "Helvetica Neue", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 500;
  --chrome-stretch: normal;
}

/* NeXTSTEP（1988–1995）：黑标题栏、灰窗口、斜线桌面。 */
:root[data-skin="nextstep"] {
  color-scheme: light;
  --desk-color: #555555;
  --desk:
    repeating-linear-gradient(135deg, rgba(0,0,0,.32) 0 1px, transparent 1px 4px),
    repeating-conic-gradient(#3c3c3c 0% 25%, #6a6a6a 0% 50%) 0 0 / 2px 2px;
  --paper: #ffffff;
  --ink: #000000;
  --muted: #333333;
  --rule: #555555;
  --soft-rule: #888888;
  --tint: #dddddd;
  --menubar-bg: #aaaaaa;
  --menubar-border: #000000;
  --win-frame: #aaaaaa;
  --win-border: #000000;
  --win-shadow: none;
  --title-bg: #000000;
  --title-stripes: none;
  --title-label-bg: #000000;
  --title-fg: #ffffff;
  --title-inset: inset 0 1px 0 #ffffff;
  --status-bg: #aaaaaa;
  --sel-bg: #000000;
  --sel-fg: #ffffff;
  --label-bg: #aaaaaa;
  --label-fg: #000000;
  --btn-bg: #aaaaaa;
  --btn-radius: 0;
  --btn-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
  --hit-bg: #000000; --hit-fg: #ffffff;
  --miss-bg: #aaaaaa; --miss-fg: #000000;
  --icon-filter: none;
  --chrome-font: Helvetica, "Helvetica Neue", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --chrome-weight: 700;
  --chrome-stretch: normal;
}

/* 新外皮的深色模式：统一反转纸面，保留各代的选择色与几何。 */
:root[data-skin="drawing-board"][data-mode="dark"],
:root[data-skin="aqua"][data-mode="dark"],
:root[data-skin="tiger"][data-mode="dark"],
:root[data-skin="snow-leopard"][data-mode="dark"],
:root[data-skin="lion"][data-mode="dark"],
:root[data-skin="yosemite"][data-mode="dark"],
:root[data-skin="big-sur"][data-mode="dark"],
:root[data-skin="liquid-glass"][data-mode="dark"],
:root[data-skin="nextstep"][data-mode="dark"] {
  color-scheme: dark;
  --paper: #141414;
  --ink: #ececec;
  --muted: #b4b4b4;
  --rule: #ececec;
  --soft-rule: #666666;
  --tint: #1e1e1e;
  --desk-color: #1d1d1d;
  --desk: radial-gradient(rgba(255,255,255,.16) .7px, transparent .85px) 0 0 / 8px 8px, #1d1d1d;
  --menubar-bg: #111111;
  --menubar-border: #ececec;
  --win-frame: #111111;
  --win-border: #ececec;
  --win-shadow: 1px 1px 0 #000000;
  --title-bg: #111111;
  --title-stripes: none;
  --title-label-bg: #111111;
  --title-fg: #ececec;
  --title-inset: none;
  --status-bg: #111111;
  --label-bg: #111111;
  --label-fg: #ececec;
  --btn-bg: #111111;
  --btn-shadow: inset 1px 1px 0 #333333;
  --icon-filter: invert(1);
}

/* 新外皮的图标是彩色/有材质的，深色模式不再统一反相。 */
:root[data-skin="aqua"][data-mode="dark"],
:root[data-skin="tiger"][data-mode="dark"],
:root[data-skin="snow-leopard"][data-mode="dark"],
:root[data-skin="lion"][data-mode="dark"],
:root[data-skin="yosemite"][data-mode="dark"],
:root[data-skin="big-sur"][data-mode="dark"],
:root[data-skin="liquid-glass"][data-mode="dark"],
:root[data-skin="nextstep"][data-mode="dark"] { --icon-filter: none; }

/* 圆角与玻璃层：只影响外皮，不动阅读排版。 */
:root[data-skin="aqua"] .win,
:root[data-skin="tiger"] .win,
:root[data-skin="snow-leopard"] .win,
:root[data-skin="lion"] .win,
:root[data-skin="yosemite"] .win,
:root[data-skin="big-sur"] .win,
:root[data-skin="liquid-glass"] .win { border-radius: 10px; overflow: hidden; }
:root[data-skin="big-sur"] .win,
:root[data-skin="liquid-glass"] .win { border-radius: 12px; }
:root[data-skin="big-sur"] .menubar,
:root[data-skin="liquid-glass"] .menubar { backdrop-filter: blur(18px) saturate(1.25); -webkit-backdrop-filter: blur(18px) saturate(1.25); }
:root[data-skin="liquid-glass"] .win { backdrop-filter: blur(20px) saturate(1.4); -webkit-backdrop-filter: blur(20px) saturate(1.4); }
:root[data-skin="liquid-glass"] .menu-list,
:root[data-skin="big-sur"] .menu-list { background: rgba(250,248,246,.94); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
:root[data-skin="liquid-glass"][data-mode="dark"] .menu-list,
:root[data-skin="big-sur"][data-mode="dark"] .menu-list { background: rgba(20,22,24,.94); }

/* ---------- 基础 ---------- */
:root {
  --text-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --mono-font: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --menubar-h: 28px;
  --title-h: 22px;
  --gutter: 16px;
  font-synthesis: none;
}
@media (pointer: coarse) {
  :root { --menubar-h: 40px; --title-h: 30px; }
}
* { box-sizing: border-box; }
html { background: var(--desk-color, #b6b6b6); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--desk);
  color: var(--ink);
  font-family: var(--text-font);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
.skip { position: absolute; left: -999px; top: 0; z-index: 100; background: var(--paper); color: var(--ink); padding: 6px 10px; border: 1px solid var(--ink); }
.skip:focus { left: 8px; top: 8px; }
::selection { background: var(--sel-bg); color: var(--sel-fg); }

/* ---------- 选单列 ---------- */
.menubar {
  position: sticky; top: 0; z-index: 50;
  height: var(--menubar-h);
  background: var(--menubar-bg);
  border-bottom: 1px solid var(--menubar-border);
  font-family: var(--chrome-font);
  font-weight: var(--chrome-weight);
  font-stretch: var(--chrome-stretch);
  font-size: 14px;
  color: var(--ink);
}
.menus { display: flex; height: 100%; padding: 0 8px; max-width: 100%; }
.menu { position: relative; }
.menu-title {
  display: flex; align-items: center; height: var(--menubar-h);
  padding: 0 10px; list-style: none; cursor: default; white-space: nowrap;
}
.menu-title::-webkit-details-marker { display: none; }
.menu[open] > .menu-title, .menu-title:hover { background: var(--sel-bg); color: var(--sel-fg); }
.menu-brand { letter-spacing: .01em; }
.menu-list {
  position: absolute; left: 0; top: 100%;
  min-width: 11rem; margin: 0; padding: 4px 0; list-style: none;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--win-border); box-shadow: 1px 1px 0 var(--win-border), var(--title-inset, none);
  font-weight: 400;
  max-height: calc(100vh - var(--menubar-h) - 12px); overflow-y: auto; overscroll-behavior: contain;
}
.menu-end .menu-list { left: auto; right: 0; }
.menu-list a, .menu-list button {
  display: block; width: 100%; padding: 6px 16px 6px 24px; text-align: left;
  color: inherit; text-decoration: none; background: none; border: 0; font: inherit; cursor: pointer; white-space: nowrap; position: relative;
}
.menu-list a:hover, .menu-list button:hover, .menu-list a:focus-visible, .menu-list button:focus-visible { background: var(--sel-bg); color: var(--sel-fg); outline: none; }
.menu-list button[aria-pressed="true"]::before { content: "✓"; position: absolute; left: 8px; }
.menu-head { padding: 4px 12px 2px; font-size: 12px; color: var(--muted); }
.sep { height: 0; margin: 4px 0; border-top: 1px dotted var(--soft-rule); }
@media (pointer: coarse) {
  .menu-list a, .menu-list button { padding-top: 11px; padding-bottom: 11px; }
}

/* ---------- 视窗 ---------- */
.desktop { padding: 24px var(--gutter) 32px; }
.win {
  background: var(--win-frame);
  border: 1px solid var(--win-border);
  box-shadow: var(--win-shadow);
  min-width: 0;
}
.win-titlebar {
  display: grid; grid-template-columns: var(--title-h) 1fr var(--title-h);
  align-items: center;
  height: var(--title-h);
  padding: 0 4px;
  background: var(--title-bg);
  border-bottom: 1px solid var(--win-border);
  box-shadow: var(--title-inset, none);
  position: relative;
}
.win-titlebar::before {
  content: ""; position: absolute; inset: 4px 3px; background: var(--title-stripes); pointer-events: none;
}
.win-title {
  position: relative; margin: 0; justify-self: center; min-width: 0; max-width: 100%;
  font-family: var(--chrome-font); font-weight: var(--chrome-weight); font-stretch: var(--chrome-stretch);
  font-size: 14px; line-height: 1; color: var(--title-fg);
}
.win-title > span {
  display: block; padding: 2px 10px; background: var(--title-label-bg);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.win-box { position: relative; justify-self: center; width: 13px; height: 13px; }
.win-close { display: grid; place-items: center; width: var(--title-h); height: var(--title-h); }
.win-close span { width: 13px; height: 13px; border: 1px solid var(--title-fg); background: var(--title-label-bg); box-shadow: 0 0 0 2px var(--title-label-bg); }
.win-close:hover span, .win-close:focus-visible span { background: var(--title-fg); }
.win-body { background: var(--paper); padding: 16px 20px; }
.win-status {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 4px 10px; border-top: 1px solid var(--win-border);
  background: var(--status-bg); font-size: 12px; color: var(--muted);
  font-family: var(--chrome-font); font-stretch: var(--chrome-stretch);
}
:root[data-skin="platinum"] .win { padding: 0 5px 5px; }
:root[data-skin="platinum"] .win-titlebar { border-bottom: 0; margin: 0 -5px 5px; }
:root[data-skin="platinum"] .win-body { border: 1px solid var(--win-border); box-shadow: inset 1px 1px 0 var(--soft-rule); }
:root[data-skin="platinum"] .win-status { border: 1px solid var(--win-border); border-top: 0; }
:root[data-skin="system7"] .win-body { border-top: 0; }

/* 图示 */
.ic { image-rendering: auto; filter: var(--icon-filter); flex: none; }
:root[data-skin="system7"] .ic, :root[data-skin="platinum"] .ic, :root[data-skin="drawing-board"] .ic { image-rendering: pixelated; }
.desk-icon { display: flex; flex-direction: column; align-items: center; gap: 4px; text-decoration: none; color: var(--label-fg); text-align: center; }
.desk-label {
  display: inline-block; padding: 1px 5px; background: var(--label-bg); color: var(--label-fg);
  font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 13px; line-height: 1.35;
}
.desk-icon:hover .desk-label, .desk-icon:focus-visible .desk-label { background: var(--sel-bg); color: var(--sel-fg); }
.desk-icon:focus-visible { outline: none; }
.desk-count { font-size: 12px; color: var(--muted); }

/* ---------- 首页 ---------- */
.home {
  display: grid; gap: 24px;
  grid-template-columns: minmax(0, 680px) 300px 96px;
  grid-template-areas: "channel side icons" "feed side icons";
  grid-template-rows: auto 1fr;
  justify-content: center; align-items: start; max-width: 1200px; margin: 0 auto;
}
.win-channel { grid-area: channel; }
.home-feed { grid-area: feed; min-width: 0; }
.home-side { grid-area: side; display: grid; gap: 24px; position: sticky; top: calc(var(--menubar-h) + 24px); }
.desk-icons { grid-area: icons; }
.channel-name { margin: 0; font-size: 30px; line-height: 1.25; letter-spacing: .01em; }
.channel-line { margin: 6px 0 14px; font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 15px; color: var(--muted); }
.channel-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; }
.btn-s { display: inline-block; padding: 4px 14px; font-size: 14px; }

/* 频道时间流：日期当分隔，每则推送一个窗口 */
.timeline { display: grid; gap: 0; }
.day-sep { display: flex; align-items: center; gap: 12px; margin: 26px 0 12px; font-size: 13px; }
.day-sep::before, .day-sep::after { content: ""; flex: 1; height: 1px; background: var(--label-fg); opacity: .35; }
.day-sep time { background: var(--label-bg); color: var(--label-fg); padding: 2px 10px; border: 1px solid var(--win-border); font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-variant-numeric: tabular-nums; }
.timeline > .day-sep:first-child { margin-top: 4px; }
.msg .win-body { padding: 18px 24px 20px; }
.msg-tags { margin: 0 0 6px; font-size: 14px; display: flex; flex-wrap: wrap; gap: 2px 10px; }
.msg-tags a { text-decoration: none; color: var(--muted); }
.msg-tags a:hover { color: var(--ink); text-decoration: underline; }
.msg-title { margin: 0 0 12px; font-size: 21px; line-height: 1.45; font-weight: 700; }
.msg-title a { text-decoration: none; }
.msg-title a:hover { text-decoration: underline; }
.prose.prose-msg { font-size: calc(17px * var(--reading-scale)); line-height: 1.85; max-width: none; margin: 0; }
.prose-msg > * { margin-bottom: .9em; }
.prose-msg > :last-child { margin-bottom: 0; }
.msg .ledger { margin-top: 14px; border-top: 1px solid var(--rule); }
.msg .win-status a { color: inherit; }
.win-zoom { display: grid; place-items: center; width: var(--title-h); height: var(--title-h); }
.win-zoom span { position: relative; width: 13px; height: 13px; border: 1px solid var(--title-fg); background: var(--title-label-bg); box-shadow: 0 0 0 2px var(--title-label-bg); }
.win-zoom span::after { content: ""; position: absolute; left: -1px; top: -1px; width: 6px; height: 6px; border: 1px solid var(--title-fg); }
.win-zoom:hover span, .win-zoom:focus-visible span { background: var(--title-fg); }
.more { text-align: center; margin: 24px 0 0; }
.more .btn { display: inline-block; }
.tag-cloud { list-style: none; margin: 12px 0 0; padding: 12px 0 0; border-top: 1px dotted var(--soft-rule); display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a { display: inline-flex; gap: 6px; align-items: baseline; padding: 2px 10px; border: 1px solid var(--ink); text-decoration: none; font-size: 14px; }
.tag-cloud a span { font-size: 12px; color: var(--muted); }
.tag-cloud a:hover, .tag-cloud a:hover span { background: var(--sel-bg); color: var(--sel-fg); }
.col-count { font-size: 13px; }
.page-tag .timeline, .page-tags .icon-grid { margin-top: 0; }
.page-tags .icon-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.desk-icons ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; justify-items: center; }
.desk-icons .desk-label { background: var(--label-bg); }

.empty { color: var(--muted); margin: 8px 0; }

.icon-grid { list-style: none; margin: 0; padding: 4px 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 8px; }
.icon-grid .desk-label { background: transparent; max-width: 100%; }
.icon-grid .desk-icon:hover .desk-label { background: var(--sel-bg); }

.otd-today { margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.otd-list { list-style: none; margin: 0; padding: 0; }
.otd-list li { padding: 6px 0; border-bottom: 1px dotted var(--soft-rule); }
.otd-list li:last-child { border-bottom: 0; }
.otd-ago { display: block; font-size: 12px; color: var(--muted); }

/* ---------- 文件视窗（文章、栏目、归档、关于） ---------- */
.reading { max-width: 860px; margin: 0 auto; display: grid; gap: 20px; }
.reading-wide { max-width: 1000px; }
.win-doc .win-body { padding: 40px 56px 56px; }
.win-doc .doc { max-width: 700px; margin: 0 auto; }
.doc-head { margin-bottom: 36px; padding-bottom: 22px; border-bottom: 1px solid var(--rule); }
.doc-kicker { margin: 0 0 10px; font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 14px; }
.doc-kicker a { text-decoration: none; padding: 1px 6px; border: 1px solid var(--ink); }
.doc-kicker a:hover { background: var(--sel-bg); color: var(--sel-fg); }
.doc-title { margin: 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.28; font-weight: 700; letter-spacing: .005em; }
.doc-head .msg-tags { font-size: 15px; margin-bottom: 10px; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 14px 0 0; font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 14px 0 0; padding: 0; }
.tags li { font-size: 13px; padding: 0 8px; border: 1px dotted var(--soft-rule); color: var(--muted); }

.prose {
  font-size: calc(19px * var(--reading-scale)); line-height: 1.95; letter-spacing: .02em;
  max-width: none; margin: 0;
  overflow-wrap: break-word; line-break: strict; hanging-punctuation: allow-end;
  text-align: start;
}
.prose > * { margin: 0 0 1.15em; }
.prose h2 { font-size: 1.3em; line-height: 1.5; margin: 2em 0 .8em; padding-bottom: .3em; border-bottom: 1px solid var(--soft-rule); text-align: left; }
.prose h3 { font-size: 1.1em; margin: 1.6em 0 .6em; text-align: left; }
.prose ul, .prose ol { padding-left: 1.6em; }
.prose li { margin: .3em 0; }
.prose a { overflow-wrap: anywhere; word-break: break-all; }
.prose blockquote {
  margin-left: 0; margin-right: 0; padding: .6em 1em; border-left: 3px solid var(--ink);
  background: var(--tint); font-size: .92em; line-height: 1.85;
}
.prose blockquote > :last-child { margin-bottom: 0; }
.prose blockquote > :first-child { margin-top: 0; }
.prose .note {
  margin: 2.4em 0 0; padding-top: .9em;
  border-top: 1px solid var(--soft-rule);
  font-size: .82em; line-height: 1.7; color: var(--muted);
  letter-spacing: .01em; text-align: start;
}
.prose .note small { font-size: inherit; }
.prose p { text-align: justify; text-justify: inter-ideograph; }
.prose strong { font-weight: 650; }
.prose a { text-decoration-thickness: .06em; text-underline-offset: .18em; }
.prose a:hover { background: var(--tint); }
.prose code { font-family: var(--mono-font); font-size: .85em; padding: .1em .35em; border: 1px solid var(--soft-rule); background: var(--tint); overflow-wrap: anywhere; }
.prose pre { overflow-x: auto; padding: 16px 18px; border: 1px solid var(--soft-rule); border-left: 3px solid var(--ink); background: var(--tint); line-height: 1.65; font-size: 14.5px; text-align: left; }
.prose pre code { border: 0; padding: 0; background: none; font-size: inherit; }
.prose hr { border: 0; height: 2px; background: var(--title-stripes); margin: 2em 0; }
.table-wrap { overflow-x: auto; }
.prose table { border-collapse: collapse; width: 100%; font-size: .9em; line-height: 1.6; text-align: left; }
.prose th, .prose td { border: 1px solid var(--ink); padding: .45em .7em; }
.prose th { background: var(--tint); font-weight: 600; }

/* 文末：来源、此前/后续、相关推送 */
.post-notes { margin-top: 32px; padding-top: 18px; border-top: 1px dotted var(--soft-rule); font-size: 14px; line-height: 1.75; color: var(--muted); }
.post-notes h2 { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 12px; letter-spacing: .1em; margin: 0 0 6px; color: var(--muted); font-weight: 600; }
.post-growth { margin: 0 0 14px; }
.post-growth p { margin: 0; max-width: var(--measure); color: var(--ink); }
.post-related { display: grid; gap: 12px; }
.post-related ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.post-related li { display: grid; grid-template-columns: 5.6em minmax(0, 1fr); gap: 8px; align-items: baseline; }
.post-related time { font-family: var(--mono-font); font-size: 11px; color: var(--muted); }
.post-related a { color: var(--ink); text-decoration: none; }
.post-related a:hover { text-decoration: underline; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.btn {
  display: block; padding: 10px 16px; text-decoration: none;
  background: var(--btn-bg); color: var(--ink);
  border: 1px solid var(--win-border); border-radius: var(--btn-radius);
  box-shadow: var(--btn-shadow), 1px 1px 0 var(--win-border);
}
.btn:hover { background: var(--sel-bg); color: var(--sel-fg); }
.pager a[rel="next"] { text-align: right; grid-column: 2; }
.pager-dir { display: block; font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 12px; color: inherit; opacity: .75; }
.pager-t { display: block; font-weight: 600; line-height: 1.5; }

.col-head { display: flex; gap: 14px; align-items: center; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--rule); }
.col-head h1 { margin: 0; font-size: 28px; line-height: 1.3; }
.col-head p { margin: 4px 0 0; color: var(--muted); }
.sub-h {
  margin: 28px 0 12px; font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-weight: var(--chrome-weight);
  font-size: 15px; display: flex; align-items: center; gap: 10px;
}
.sub-h::after { content: ""; flex: 1; height: 6px; background: var(--title-stripes); }
.win-body > .sub-h:first-child, .ledger-book > .sub-h:first-child { margin-top: 4px; }

/* ---------- 预言帐本 ---------- */
.post-ledger { margin-top: 48px; padding-top: 8px; border-top: 1px solid var(--rule); }
.post-ledger > h2 { font-size: 22px; margin: 16px 0; }
.ledger-stats { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 0; margin: 0 0 12px; border: 1px solid var(--ink); }
.stat { padding: 10px 12px; border-left: 1px solid var(--ink); }
.stat:first-child { border-left: 0; }
.stat dt { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 12px; color: var(--muted); }
.stat dd { margin: 0; font-size: 26px; font-weight: 700; line-height: 1.3; font-variant-numeric: tabular-nums; }
.stat-rate dd:not(.stat-note) { font-size: 34px; }
.stat dd.stat-note { font-size: 11px; font-weight: 400; color: var(--muted); }
.ledger-bar { display: flex; height: 12px; border: 1px solid var(--ink); margin-bottom: 20px; }
.bar-hit { background: var(--hit-bg); }
.bar-miss { background: repeating-linear-gradient(45deg, var(--ink) 0 1px, var(--paper) 1px 4px); border-left: 1px solid var(--ink); }
.bar-pending { background: var(--paper); border-left: 1px solid var(--ink); }
.bar-hit[style="flex:0"], .bar-miss[style="flex:0"], .bar-pending[style="flex:0"] { display: none; }
.ledger { list-style: none; margin: 0; padding: 0; }
.ledger-row {
  display: grid; grid-template-columns: 4.5rem minmax(0, 1fr) auto; gap: 4px 14px; align-items: start;
  padding: 14px 4px; border-bottom: 1px dotted var(--soft-rule);
}
.ledger-id { font-family: var(--mono-font); font-size: 13px; color: var(--muted); padding-top: 4px; }
.ledger-claim { margin: 0; font-size: 17px; line-height: 1.7; font-weight: 600; }
.badge { justify-self: end; font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 13px; padding: 2px 10px; border: 1px solid var(--ink); white-space: nowrap; }
.badge-hit { background: var(--hit-bg); color: var(--hit-fg); border-color: var(--hit-bg); }
.badge-miss { background: var(--miss-bg); color: var(--miss-fg); border-width: 2px; padding: 1px 9px; }
.badge-pending { border-style: dashed; color: var(--muted); }
.ledger-meta { grid-column: 2 / -1; display: flex; flex-wrap: wrap; gap: 2px 18px; margin: 0; font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
.ledger-meta div { display: flex; gap: 6px; }
.ledger-meta dd { margin: 0; color: var(--ink); }
.ledger-note, .ledger-src { grid-column: 2 / -1; margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- 归档 ---------- */
.arc-months { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.arc-month { border: 1px solid var(--ink); padding: 12px 14px; background: var(--paper); }
.arc-month h3 { margin: 0 0 8px; font-size: 18px; display: flex; justify-content: space-between; align-items: baseline; }
.arc-month h3 span { font-size: 13px; font-weight: 400; color: var(--muted); }
.cal { width: 100%; border-collapse: collapse; table-layout: fixed; font-size: 13px; font-variant-numeric: tabular-nums; text-align: center; }
.cal th { font-weight: 400; color: var(--muted); padding: 2px 0 4px; border-bottom: 1px solid var(--soft-rule); }
.cal td { padding: 0; height: 28px; color: var(--muted); }
.cal td.has a { display: grid; place-items: center; height: 26px; margin: 1px; background: var(--sel-bg); color: var(--sel-fg); font-weight: 700; text-decoration: none; border-radius: 0; }
:root[data-skin="system6"] .cal td.has a, :root:not([data-skin]) .cal td.has a { background: var(--ink); color: var(--paper); }
.cal td.has a:hover { outline: 2px solid var(--ink); }
.arc-list { list-style: none; margin: 10px 0 0; padding: 8px 0 0; border-top: 1px dotted var(--soft-rule); }
.arc-list li { display: grid; grid-template-columns: 3em 1fr; gap: 8px; padding: 3px 0; font-size: 15px; line-height: 1.6; }
.arc-list time { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------- 关于（原站内容） ---------- */
.about-stack { gap: 28px; }
.legacy .win-body { padding: 24px 28px 28px; font-size: 17px; line-height: 1.85; }
.legacy h1, .legacy h2, .legacy h3 { line-height: 1.35; }
.legacy p { margin: 0 0 .8em; }
.section-lede { color: var(--muted); margin-bottom: 18px; }
.section-lede p { margin: 0; }
.legacy-hero .win-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 28px; align-items: start; }
.hero-copy h1 { margin: 0; font-size: clamp(40px, 6vw, 64px); letter-spacing: -.01em; line-height: 1.05; }
.hero-copy .question { font-size: clamp(22px, 2.6vw, 28px); line-height: 1.45; margin: 18px 0 10px; font-weight: 600; }
.hero-copy .stop { color: #af3828; }
:root[data-mode="dark"] .hero-copy .stop { color: #e2735f; }
.hero-copy .line { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 15px; }
.hero-copy .lede { color: var(--muted); }
.hero-split { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 16px; align-items: stretch; }
.slot { margin: 0; }
.slot img, .frame img, .portrait img { display: block; width: 100%; border: 1px solid var(--ink); }
.slot figcaption, .frame figcaption { font-size: 13px; color: var(--muted); padding-top: 6px; line-height: 1.5; }
.slot figcaption span, .frame figcaption span { display: block; color: var(--ink); font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); }
.slot figcaption strong { font-weight: 400; }
/* 原站的 WindowShade 示范，换成真的小视窗。 */
.shade { position: relative; min-height: 15rem; border: 1px solid var(--ink); background: var(--tint); box-shadow: 1px 1px 0 var(--ink); overflow: hidden; }
.shade-under { margin: 0; padding: 3.2rem 1rem 1rem; font-size: 22px; line-height: 1.35; font-weight: 600; color: var(--muted); }
.shade-sheet { position: absolute; inset: 0; background: var(--paper); transition: height 220ms ease; overflow: hidden; }
.shade.is-shut .shade-sheet { bottom: auto; height: var(--title-h); border-bottom: 1px solid var(--ink); }
.shade-sheet button {
  display: grid; grid-template-columns: var(--title-h) 1fr var(--title-h); align-items: center; width: 100%; height: var(--title-h);
  margin: 0; padding: 0 4px; border: 0; border-bottom: 1px solid var(--win-border); background: var(--title-bg); box-shadow: var(--title-inset, none);
  font: inherit; font-family: var(--chrome-font); font-weight: var(--chrome-weight); font-stretch: var(--chrome-stretch); font-size: 14px; color: var(--title-fg); cursor: pointer; position: relative;
}
.shade-sheet button::before { content: ""; position: absolute; inset: 4px 3px; background: var(--title-stripes); }
.shade-sheet button > span { position: relative; justify-self: center; }
.shade-sheet button > span:last-child { padding: 2px 10px; background: var(--title-label-bg); line-height: 1; }
.shade-sq { width: 13px; height: 13px; border: 1px solid var(--title-fg); background: var(--title-label-bg); box-shadow: 0 0 0 2px var(--title-label-bg); }
.shade-body p { margin: 14px 16px; font-size: 16px; }
.shade-hint { color: var(--muted); font-size: 14px !important; }
.shade-status { grid-column: 1 / -1; margin: 0; font-size: 14px; color: var(--muted); }
.legacy-hero .win-body > .shade-status { margin-top: -12px; }

.work-split { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; }
.piece { border-top: 1px solid var(--rule); padding-top: 12px; }
.piece-kicker, .essay-kicker { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 13px; color: var(--muted); margin: 0 0 4px !important; }
.piece h3, .essay h3 { margin: 0 0 8px; font-size: 22px; }
.piece h3 a, .essay h3 a { text-decoration: none; }
.piece h3 a:hover, .essay h3 a:hover { text-decoration: underline; }
.piece .desk {
  display: grid; gap: 6px; margin: 12px 0; padding: 16px; min-height: 0;
  border: 1px solid var(--ink); background: var(--desk); text-decoration: none; color: var(--ink);
}
.piece .desk > span { justify-self: start; background: var(--paper); padding: 2px 8px; }
.desk-kicker { font-size: 13px; }
.desk-title { font-size: 20px; font-weight: 700; }
.desk-go { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); font-size: 14px; }
.piece .desk:hover .desk-go { background: var(--sel-bg); color: var(--sel-fg); }
.role { color: var(--muted); }
.aside-line { margin: 16px 0 0 !important; color: var(--muted); font-size: 15px; }
.aside-line a { color: var(--ink); }
.frames { display: grid; grid-template-columns: 1.3fr .9fr .75fr 1.05fr; gap: 12px; align-items: end; }
.frame { margin: 0; }
.roles { margin-top: 28px; }
.roles-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; border-top: 1px solid var(--rule); padding-top: 12px; margin-bottom: 12px; }
.roles-head h3 { margin: 0; font-size: 20px; }
.roles-head p { margin: 0 !important; color: var(--muted); }
.portraits { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.portrait { margin: 0; }
.portrait figcaption { padding-top: 6px; font-size: 14px; }
.essay { border-top: 1px solid var(--rule); padding-top: 12px; margin-bottom: 16px; }
.essay-lead h3 { font-size: 26px; }
.essay-q { font-size: 20px; font-weight: 600; }
.essay-rest { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.facts { margin: 0 0 16px; }
.facts div { display: grid; grid-template-columns: 9em 1fr; gap: 12px; padding: 8px 0; border-bottom: 1px dotted var(--soft-rule); }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.profile-sub { font-size: 18px; margin: 16px 0 8px; }
.cases { margin: 0; padding-left: 1.4em; }
.cases li { margin: 8px 0; }
.cases li > span { display: block; color: var(--muted); }
.social { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; margin: 0; padding: 0; }
.social a { display: inline-block; padding: 6px 14px; text-decoration: none; background: var(--btn-bg); border: 1px solid var(--win-border); border-radius: var(--btn-radius); box-shadow: var(--btn-shadow), 1px 1px 0 var(--win-border); }
.social a:hover { background: var(--sel-bg); color: var(--sel-fg); }

/* ---------- 名片 ---------- */
.card-stage { max-width: 560px; margin: 4vh auto 0; }
.card { text-align: left; }
.card-url { margin: 0 0 12px; font-family: var(--mono-font); font-size: 13px; color: var(--muted); }
.card h1 { margin: 0; font-size: 44px; line-height: 1.1; }
.card .question { font-size: 22px; font-weight: 600; margin: 14px 0 6px; }
.card .stop { color: #af3828; }
:root[data-mode="dark"] .card .stop { color: #e2735f; }
.card .line { font-family: var(--chrome-font); font-stretch: var(--chrome-stretch); margin: 0 0 16px; }
.card-works { list-style: none; margin: 0 0 12px; padding: 12px 0 0; border-top: 1px solid var(--rule); display: flex; gap: 18px; flex-wrap: wrap; font-weight: 600; }
.card-blurb { color: var(--muted); margin: 0 0 16px; }

/* ---------- 页尾 ---------- */
.foot { padding: 0 var(--gutter) 28px; text-align: center; font-size: 12px; }
.foot > * { background: var(--label-bg); color: var(--label-fg); padding: 1px 6px; }
.foot > a { text-decoration: none; }

/* ---------- 窄萤幕 ---------- */
@media (max-width: 1100px) {
  .home { grid-template-columns: minmax(0, 1fr) 280px; grid-template-areas: "icons icons" "channel side" "feed side"; grid-template-rows: auto auto 1fr; }
  .desk-icons ul { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  :root { --gutter: 8px; }
  .desktop { padding-top: 14px; }
  .home { grid-template-columns: minmax(0, 1fr); grid-template-areas: "channel" "feed" "side" "icons"; grid-template-rows: none; gap: 16px; }
  .home-side { position: static; }
  .msg .win-body { padding: 14px 14px 16px; }
  .msg-title { font-size: 19px; }
  .prose.prose-msg { font-size: calc(17px * var(--reading-scale)); }
  .channel-name { font-size: 26px; }
  .desk-icons ul { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 4px; }
  .win-body { padding: 14px 14px; }
  .win-doc .win-body { padding: 28px 20px 36px; }
  .prose { font-size: calc(18px * var(--reading-scale)); line-height: 1.9; letter-spacing: .01em; }
  .doc-head { margin-bottom: 24px; }
  .pager { grid-template-columns: 1fr; }
  .pager a[rel="next"] { grid-column: 1; }
  .ledger-stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: 0; border-top: 1px solid var(--ink); }
  .stat-rate { grid-column: 1 / -1; border-top: 0; }
  .stat:nth-child(2n+1):not(.stat-rate) { border-left: 1px solid var(--ink); }
  .stat:nth-child(2), .stat:nth-child(4) { border-left: 0; }
  .stat:nth-child(3), .stat:nth-child(5) { border-left: 1px solid var(--ink); }
  .ledger-row { grid-template-columns: minmax(0, 1fr) auto; }
  .ledger-id { grid-column: 1; padding-top: 0; }
  .badge { grid-column: 2; grid-row: 1; }
  .ledger-claim, .ledger-meta, .ledger-note, .ledger-src { grid-column: 1 / -1; }
  .legacy .win-body { padding: 18px 16px 20px; font-size: 16px; }
  .legacy-hero .win-body, .hero-split, .work-split, .essay-rest { grid-template-columns: minmax(0, 1fr); }
  .frames, .portraits { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .facts div { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .card h1 { font-size: 36px; }
  .col-head h1 { font-size: 24px; }
  .menus { padding: 0 2px; }
  .menu-title { padding: 0 8px; font-size: 14px; }
}
@media (max-width: 360px) {
  .menu-title { padding: 0 6px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .shade-sheet { transition: none; }
}

/* 精选：按线索排的选读页 */
.page-best .reading { max-width: 780px; }
.pick-groups { display: grid; gap: 34px; margin-top: 26px; }
.pick-group h2 {
  margin: 0 0 4px; padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--chrome-font); font-size: 12px; font-weight: 700;
  letter-spacing: .12em; color: var(--muted);
}
.pick-list { list-style: none; margin: 0; padding: 0; }
.pick-list li {
  display: grid; grid-template-columns: 7.4em minmax(0, 1fr); gap: 14px;
  padding: 12px 0; border-bottom: 1px dotted var(--soft-rule);
}
.pick-list li:last-child { border-bottom: 0; }
.pick-list time {
  padding-top: 3px; white-space: nowrap;
  font-family: var(--mono-font); font-size: 11px; color: var(--muted);
}
.pick-list a { font-weight: 600; text-decoration: none; }
.pick-list a:hover { text-decoration: underline; text-underline-offset: 3px; }
.pick-list p { margin: 3px 0 0; font-size: 14px; line-height: 1.65; color: var(--muted); }
@media (max-width: 600px) {
  .pick-list li { grid-template-columns: 1fr; gap: 2px; padding: 11px 0; }
  .pick-list time { padding-top: 0; }
}

/* 笔记：首页里的紧凑窗口 */
.note-msg { border-left: 3px solid var(--rule); }
.note-msg .win-body { padding: 13px 22px 14px; }
.note-msg .note-text { font-size: calc(15px * var(--reading-scale)); line-height: 1.75; }
.note-msg .note-text p { margin: 0; }
.note-msg .note-text p + p { margin-top: 8px; }
.note-link { margin: 7px 0 0; font-size: 13px; line-height: 1.5; }
.note-link a { color: var(--muted); text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
.note-link a:hover { color: var(--ink); border-bottom-style: solid; }
.note-msg .win-status { font-size: 12px; }

/* 笔记页：一扇窗里的紧凑列表 */
.note-list { list-style: none; margin: 24px 0 0; padding: 0; }
.note-entry {
  display: grid; grid-template-columns: 7.2em minmax(0, 1fr); gap: 14px;
  padding: 14px 0; border-top: 1px dotted var(--soft-rule);
  scroll-margin-top: calc(var(--menubar-h) + 16px);
}
.note-entry:first-child { border-top: 0; }
.note-entry:target { background: var(--tint); }
.note-entry > time { padding-top: 2px; white-space: nowrap; font-family: var(--mono-font); font-size: 11px; color: var(--muted); }
.note-entry-main { min-width: 0; font-size: calc(15px * var(--reading-scale)); line-height: 1.8; }
.note-entry-main .note-text p { margin: 0; }
.note-entry-main .note-text p + p { margin-top: 8px; }
@media (max-width: 600px) {
  .note-entry { grid-template-columns: 1fr; gap: 3px; }
  .note-entry > time { padding-top: 0; }
  .note-msg .win-body { padding: 12px 14px 14px; }
}

/* ============================================================
   外观校准：按 AI System 6 产品站的做法，让 12 套外皮各自
   带上年代字体、标题栏高度、窗框、按钮和控件形状，而不是
   只换一组颜色。
   ============================================================ */

/* 桌面固定成视口大小，渐变不会随长文拉成一整块单色。 */
html { background-color: var(--desk-color, #b6b6b6); }
body { background: transparent; }
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1;
  background: var(--desk); pointer-events: none;
}

.win { border-radius: var(--win-radius, 0); }
.win-body { background: var(--win-bg, var(--paper)); }
.msg .win-body, .win-doc .win-body { background: var(--doc-bg, var(--paper)); }
.win-title { font-size: var(--title-font-size, 14px); }
.win-titlebar { border-bottom-color: var(--title-border, var(--win-border)); }
.btn { color: var(--btn-ink, var(--ink)); border-color: var(--btn-border, var(--win-border)); }
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .btn {
  box-shadow: var(--btn-shadow);
}
.menu-title { font-size: var(--menu-font-size, 14px); }
.menu-year {
  float: right; margin-left: 26px; font-size: 11px; font-weight: 400;
  color: var(--muted); opacity: .85; font-variant-numeric: tabular-nums;
}
.menu-list button:hover .menu-year { color: inherit; opacity: .8; }

/* System 6 / System 7：Chicago；System 7 只把颜色带到窗框。 */
:root[data-skin="system6"],
:root[data-skin="system7"] {
  --text-font: Chicago_12, Chicago, Geneva, Verdana, "Songti SC", STSong, SimSun, serif;
  --mono-font: Monaco, "Courier New", monospace;
  --title-h: 25px;
  --title-font-size: 14px;
  --win-radius: 0;
  --menu-font-size: 14px;
}
/* Platinum：Charcoal 的替身 Asap，压纹按钮与灰窗面。 */
:root[data-skin="platinum"] {
  --text-font: Charcoal, "Charcoal CY", "Platinum Asap", Geneva, "Noto Sans", Tahoma, Verdana, "Songti SC", STSong, SimSun, sans-serif;
  --mono-font: Monaco, "Courier New", monospace;
  --title-h: 25px;
  --title-font-size: 12px;
  --win-radius: 0;
  --menu-font-size: 13px;
  --chrome-weight: 700;
  font-variation-settings: "wdth" 113;
}
:root[data-skin="platinum"]:not([data-mode="dark"]) {
  --doc-bg: #ffffff;
  --win-frame: #cccccc;
  --win-bg: #cccccc;
  --win-border: #262626;
  --win-shadow: 2px 2px 0 #262626;
  --title-bg: #cccccc;
  --title-stripes: repeating-linear-gradient(to bottom, #ffffff 0 1px, #777777 1px 2px);
  --title-label-bg: #cccccc;
  --title-inset: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #999999;
  --title-border: #262626;
  --menubar-bg: #dddddd;
  --menubar-border: #262626;
  --status-bg: #dddddd;
  --btn-bg: #dddddd;
  --btn-radius: 3px;
  --btn-border: #262626;
  --btn-shadow: inset 1px 1px 0 #dddddd, inset -1px -1px 0 #777777, inset 2px 2px 0 #ffffff, inset -2px -2px 0 #aaaaaa;
  --tbox-a: #9a9a9a; --tbox-b: #f1f1f1; --tbox-hi: #ffffff; --tbox-lo: #808080; --tbox-ring: #262626;
}

/* Drawing Board：Platinum 的控件画在草图纸上。 */
:root[data-skin="drawing-board"] {
  --text-font: "Platinum Asap", Charcoal, Geneva, "Noto Sans", Tahoma, Verdana, "Songti SC", STSong, SimSun, sans-serif;
  --mono-font: Monaco, "Courier New", monospace;
  --title-h: 25px;
  --title-font-size: 15px;
  --win-radius: 0;
  --menu-font-size: 14px;
  font-variation-settings: "wdth" 113;
}
:root[data-skin="drawing-board"]:not([data-mode="dark"]) {
  --doc-bg: #f5eee3;
  --win-frame: #e2dacf;
  --win-bg:
    repeating-linear-gradient(0deg, rgba(43, 36, 28, .035) 0 1px, transparent 1px 18px),
    #f5eee3;
  --win-border: #857765;
  --win-shadow: none;
  --title-bg: #e0d9cf;
  --title-stripes: repeating-linear-gradient(135deg, rgba(43, 36, 28, .2) 0 1px, transparent 1px 4px);
  --title-label-bg: #e0d9cf;
  --title-inset: inset 0 1px 0 #f4efe7;
  --title-border: #857765;
  --menubar-bg: #e5dbcd;
  --menubar-border: #574c41;
  --status-bg: #e7e3de;
  --btn-bg: #e7e3de;
  --btn-radius: 2px;
  --btn-border: #857765;
  --btn-shadow: inset 1px 1px 0 #f4efe7, inset -1px -1px 0 #958671;
}

/* Aqua：Lucida Grande、条纹窗面、交通灯、凝胶按钮。 */
:root[data-skin="aqua"] {
  --text-font: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", STHeiti, "Heiti SC", SimHei, sans-serif;
  --mono-font: Monaco, "Courier New", monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 600;
  --win-radius: 8px;
  --menu-font-size: 14px;
}
:root[data-skin="aqua"]:not([data-mode="dark"]) {
  --doc-bg: #fbfbfb;
  --desk-color: #31599e;
  --desk: linear-gradient(165deg, #7db2e8 0%, #4a7fc4 45%, #274d8f 100%);
  --win-frame: #f4f4f4;
  --win-bg: repeating-linear-gradient(to bottom, #f4f4f4 0 3px, #e9e9e9 3px 6px);
  --win-border: #8a8a8a;
  --win-shadow: 0 8px 24px rgba(0, 0, 0, .45);
  --title-bg: linear-gradient(#fdfdfd, #d2d2d2);
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #171717;
  --title-inset: none;
  --title-border: #9a9a9a;
  --menubar-bg: linear-gradient(#fefefe, #d8d8d8);
  --menubar-border: #999999;
  --status-bg: linear-gradient(#fefefe, #d8d8d8);
  --btn-bg: linear-gradient(#ffffff, #dbe9fb 55%, #b5d3f6);
  --btn-border: #7f9db9;
  --btn-radius: 14px;
  --btn-shadow: inset 0 1px 2px rgba(255, 255, 255, .9), 0 1px 2px rgba(0, 0, 0, .25);
  --sel-bg: #3479d4;
}

/* Tiger：Aqua 的底子，Finder 的金属。 */
:root[data-skin="tiger"] {
  --text-font: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", STHeiti, "Heiti SC", SimHei, sans-serif;
  --mono-font: Monaco, "Courier New", monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 600;
  --win-radius: 8px;
  --menu-font-size: 14px;
}
:root[data-skin="tiger"]:not([data-mode="dark"]) {
  --doc-bg: #fbfbfb;
  --desk-color: #4a7ab4;
  --desk: linear-gradient(165deg, #7db2e8 0%, #4a7fc4 45%, #274d8f 100%);
  --win-frame: #d8d8d8;
  --win-bg: #ececec;
  --win-border: #7d838a;
  --win-shadow: 0 1px 1px rgba(0, 0, 0, .25), 0 6px 18px rgba(0, 0, 0, .28);
  --title-bg: linear-gradient(#e9e9e9, #c9c9c9);
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #1a1a1a;
  --title-inset: inset 0 1px 0 #ffffff;
  --title-border: #7d838a;
  --menubar-bg:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, .24) 0 1px, transparent 1px 2px),
    linear-gradient(#c8ccd2, #b8bdc4 45%, #aeb3ba);
  --menubar-border: #7d838a;
  --status-bg: linear-gradient(#f0f0f0, #d8d8d8);
  --btn-bg: linear-gradient(#ffffff, #dbe9fb 55%, #b5d3f6);
  --btn-border: #7f9db9;
  --btn-radius: 14px;
  --btn-shadow: inset 0 1px 2px rgba(255, 255, 255, .9), 0 1px 2px rgba(0, 0, 0, .25);
  --sel-bg: #3479d4;
}

/* Snow Leopard / Lion：Lucida Grande，Menlo，灰色标题梯。 */
:root[data-skin="snow-leopard"],
:root[data-skin="lion"] {
  --text-font: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", STHeiti, "Heiti SC", SimHei, sans-serif;
  --mono-font: Menlo, "DejaVu Sans Mono", Consolas, monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 600;
  --win-radius: 6px;
  --menu-font-size: 14px;
}
:root[data-skin="snow-leopard"]:not([data-mode="dark"]),
:root[data-skin="lion"]:not([data-mode="dark"]) {
  --doc-bg: #fbfbfb;
  --win-frame: #e8e8e8;
  --win-bg: #e8e8e8;
  --win-border: #6f6f6f;
  --win-shadow: 0 10px 28px rgba(0, 0, 0, .5);
  --title-bg: linear-gradient(#f2f2f2, #c6c6c6);
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #3a3a3a;
  --title-inset: none;
  --title-border: #8e8e8e;
  --menubar-bg: linear-gradient(#f4f4f4, #cfcfcf);
  --menubar-border: #909090;
  --status-bg: linear-gradient(#f4f4f4, #cfcfcf);
  --btn-bg: linear-gradient(#ffffff, #d6d6d6);
  --btn-border: #8e8e8e;
  --btn-radius: 12px;
  --btn-shadow: 0 1px 1px rgba(0, 0, 0, .2);
  --sel-bg: #2f66b0;
}
:root[data-skin="lion"]:not([data-mode="dark"]) {
  --title-bg: linear-gradient(#f1f1f1, #dcdcdc 55%, #c0c0c0);
}
:root[data-skin="lion"]:not([data-mode="dark"]) { --win-bg: #ededed; }

/* Yosemite：Helvetica Neue，扁平、发丝线、蓝色文字按钮。 */
:root[data-skin="yosemite"] {
  --text-font: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", "Hiragino Sans GB", "Heiti SC", STHeiti, SimHei, sans-serif;
  --mono-font: Menlo, "DejaVu Sans Mono", Consolas, monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 500;
  --win-radius: 8px;
  --menu-font-size: 13px;
}
:root[data-skin="yosemite"]:not([data-mode="dark"]) {
  --doc-bg: #f6f6f6;
  --ink: #2b2b2b;
  --desk-color: #4568dc;
  --desk: linear-gradient(160deg, #b06ab3 0%, #7b5bb8 45%, #4568dc 100%);
  --win-frame: #f6f6f6;
  --win-bg: #f6f6f6;
  --win-border: #c9c9c9;
  --win-shadow: 0 12px 32px rgba(0, 0, 0, .35);
  --title-bg: linear-gradient(#f6f6f6, #ececec);
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #4a4a4a;
  --title-inset: none;
  --title-border: #d6d6d6;
  --menubar-bg: rgba(250, 250, 250, .85);
  --menubar-border: #d9d9d9;
  --status-bg: rgba(250, 250, 250, .85);
  --btn-bg: #ffffff;
  --btn-border: #c8c8c8;
  --btn-ink: #0a60ff;
  --btn-radius: 6px;
  --btn-shadow: none;
  --sel-bg: #0a60ff;
}
:root[data-skin="yosemite"] .menubar { backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }

/* Big Sur：圆角、柔和表面、SF，蓝色文字按钮。 */
:root[data-skin="big-sur"] {
  --text-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable Text", "Segoe UI", Roboto, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
  --mono-font: ui-monospace, "SF Mono", Menlo, "Cascadia Mono", "Segoe UI Mono", monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 600;
  --win-radius: 10px;
  --menu-font-size: 13px;
}
:root[data-skin="big-sur"]:not([data-mode="dark"]) {
  --doc-bg: #f6f6f6;
  --ink: #2b2b2b;
  --desk-color: #4568dc;
  --desk: linear-gradient(145deg, #ec6278, #f8a27c 30%, #4b619a 60%, #153b70);
  --win-frame: #f6f6f6;
  --win-bg: #f6f6f6;
  --win-border: #c9c9c9;
  --win-shadow: 0 12px 32px rgba(0, 0, 0, .35);
  --title-bg: #f0efee;
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #4a4a4a;
  --title-inset: none;
  --title-border: #d6d6d6;
  --menubar-bg: rgba(250, 250, 250, .85);
  --menubar-border: #d9d9d9;
  --status-bg: rgba(250, 250, 250, .85);
  --btn-bg: #ffffff;
  --btn-border: #c8c8c8;
  --btn-ink: #0a60ff;
  --btn-radius: 6px;
  --btn-shadow: none;
  --sel-bg: #0a64d8;
}

/* Liquid Glass：玻璃层、18px 圆角、胶囊按钮。 */
:root[data-skin="liquid-glass"] {
  --text-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable Text", "Segoe UI", Roboto, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
  --mono-font: ui-monospace, "SF Mono", Menlo, "Cascadia Mono", "Segoe UI Mono", monospace;
  --title-h: 30px;
  --title-font-size: 15px;
  --chrome-weight: 600;
  --win-radius: 18px;
  --menu-font-size: 13px;
}
:root[data-skin="liquid-glass"]:not([data-mode="dark"]) {
  --doc-bg: rgba(255, 255, 255, .82);
  --ink: #1c1c1e;
  --desk-color: #aab6c8;
  --desk: linear-gradient(140deg, #f6d5c3 0%, #dcd0e8 35%, #c9d6f0 65%, #9fb3cd 100%);
  --win-frame: rgba(255, 255, 255, .58);
  --win-bg: rgba(255, 255, 255, .58);
  --win-border: rgba(255, 255, 255, .65);
  --win-shadow: 0 18px 48px rgba(40, 55, 80, .35);
  --title-bg: linear-gradient(rgba(255, 255, 255, .5), rgba(255, 255, 255, .15));
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #33383f;
  --title-inset: none;
  --title-border: rgba(255, 255, 255, .4);
  --menubar-bg: rgba(255, 255, 255, .55);
  --menubar-border: rgba(255, 255, 255, .5);
  --status-bg: rgba(255, 255, 255, .38);
  --btn-bg: rgba(255, 255, 255, .65);
  --btn-border: rgba(255, 255, 255, .8);
  --btn-ink: #1c1c1e;
  --btn-radius: 999px;
  --btn-shadow: 0 2px 10px rgba(40, 55, 80, .25), inset 0 1px 0 rgba(255, 255, 255, .9);
  --sel-bg: rgba(40, 90, 200, .8);
}

/* NeXTSTEP：Helvetica、黑标题栏、右侧关闭盒、灰色窗面。 */
:root[data-skin="nextstep"] {
  --text-font: Helvetica, Arial, "Liberation Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono-font: "Courier New", Courier, "Liberation Mono", monospace;
  --title-h: 23px;
  --title-font-size: 13px;
  --chrome-weight: 700;
  --win-radius: 0;
  --menu-font-size: 13px;
}
:root[data-skin="nextstep"]:not([data-mode="dark"]) {
  --doc-bg: #ffffff;
  --ink: #000000;
  --paper: #aaaaaa;
  --desk-color: #555555;
  --desk: none;
  --win-frame: #aaaaaa;
  --win-bg: #aaaaaa;
  --win-border: #000000;
  --win-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
  --title-bg: #000000;
  --title-stripes: none;
  --title-label-bg: transparent;
  --title-fg: #ffffff;
  --title-inset: none;
  --title-border: #000000;
  --menubar-bg: #aaaaaa;
  --menubar-border: #000000;
  --status-bg: #aaaaaa;
  --btn-bg: #aaaaaa;
  --btn-border: #000000;
  --btn-radius: 0;
  --btn-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
  --sel-bg: #ffffff;
  --sel-fg: #000000;
  --label-bg: #aaaaaa;
  --label-fg: #000000;
}

/* Aqua 一系：交通灯，而不是一个方形的关闭盒。 */
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .win-titlebar > .win-box:first-child {
  justify-self: start;
  width: 12px; height: 12px;
  margin-left: 4px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, .18);
  background: #ff5f57;
  box-shadow: 19px 0 0 #febc2e, 38px 0 0 #28c840;
}
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .win-close span {
  width: 12px; height: 12px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  box-shadow: none;
}
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .win-close:hover,
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .win-close:focus-visible {
  filter: brightness(.9);
}
:root:is([data-skin="aqua"], [data-skin="tiger"], [data-skin="snow-leopard"], [data-skin="lion"], [data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .win-titlebar > .win-box:last-child { display: none; }

/* NeXTSTEP：关闭盒在右边，带 X；标题栏只剩标题。 */
:root[data-skin="nextstep"] .win-titlebar { display: flex; justify-content: center; align-items: center; padding: 0 26px 0 4px; }
/* 没有关闭链接的窗（频道、标签、推送卡片）在右边画一个 NeXT 关闭盒。 */
:root[data-skin="nextstep"] .win-titlebar > .win-box:last-child {
  display: block;
  position: absolute; right: 5px; top: 50%;
  width: 15px; height: 15px;
  transform: translateY(-50%);
  border: 1px solid #000000;
  background: #aaaaaa;
  box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
}
:root[data-skin="nextstep"] .win-titlebar > .win-box:last-child::before,
:root[data-skin="nextstep"] .win-titlebar > .win-box:last-child::after {
  content: ""; position: absolute; inset: 3px;
  background:
    linear-gradient(45deg, transparent 44%, #000000 44% 56%, transparent 56%),
    linear-gradient(-45deg, transparent 44%, #000000 44% 56%, transparent 56%);
}
:root[data-skin="nextstep"] .win-close ~ .win-box:last-child { display: none; }
:root[data-skin="nextstep"] .win-close {
  position: absolute; right: 5px; top: 50%; z-index: 2;
  width: 15px; height: 15px; margin: 0;
  transform: translateY(-50%);
}
:root[data-skin="nextstep"] .win-close span {
  position: relative;
  width: 15px; height: 15px;
  border: 1px solid #000000;
  background: #aaaaaa;
  box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
}
:root[data-skin="nextstep"] .win-close span::before,
:root[data-skin="nextstep"] .win-close span::after {
  content: ""; position: absolute; inset: 3px;
  background:
    linear-gradient(45deg, transparent 44%, #000000 44% 56%, transparent 56%),
    linear-gradient(-45deg, transparent 44%, #000000 44% 56%, transparent 56%);
}
:root[data-skin="nextstep"] .win-close:hover span,
:root[data-skin="nextstep"] .win-close:focus-visible span { background: #ffffff; }
:root[data-skin="nextstep"] .win-zoom { display: none; }

/* 触屏上标题栏不能再压到 23–25px。 */
@media (pointer: coarse) {
  :root[data-skin] { --title-h: 32px; }
}

/* 外观选单：年份留在同一行，长名字不再把年份挤到下一行。 */
.menu-list { min-width: 13.5rem; }
.menu-list button { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.menu-year { float: none; margin-left: auto; }

/* 现代三代的桌面标签不再套白底，改成截图里的白字加投影。 */
:root:is([data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .desk-icons .desk-label {
  background: transparent;
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .6), 0 0 4px rgba(0, 0, 0, .25);
}
:root:is([data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .desk-icons .desk-icon:hover .desk-label,
:root:is([data-skin="yosemite"], [data-skin="big-sur"], [data-skin="liquid-glass"]) .desk-icons .desk-icon:focus-visible .desk-label {
  background: var(--sel-bg);
  color: #ffffff;
  text-shadow: none;
}

/* NeXTSTEP 左边的 miniaturize 盒（没有关闭链接的窗用装饰盒占位）。 */
:root[data-skin="nextstep"] .win-titlebar > .win-box:first-child:not(.win-close) {
  justify-self: start;
  width: 15px; height: 15px;
  margin-left: 5px;
  border: 1px solid #000000;
  background: #aaaaaa;
  box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #555555;
}
:root[data-skin="nextstep"] .win-titlebar > .win-box:first-child:not(.win-close)::after {
  content: ""; position: absolute; left: 4px; right: 4px; top: 9px;
  height: 1px; background: #000000;
}

/* 搜索 */
.menu-plain { text-decoration: none; }
.page-search .win-search { max-width: 820px; margin: 0 auto; }
.search-form { display: block; margin: 18px 0 10px; }
.search-main { display: flex; gap: 10px; }
.search-form input {
  flex: 1; min-width: 0; padding: 10px 12px;
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--win-border); border-radius: var(--btn-radius, 0);
  box-shadow: inset 1px 1px 0 var(--soft-rule);
}
.search-form input:focus-visible { outline: 2px solid var(--sel-bg); outline-offset: 1px; }
.search-form .btn { flex: none; padding: 10px 18px; }
.search-status { margin: 8px 0 0; font-size: 13px; color: var(--muted); }
.search-results { list-style: none; margin: 18px 0 0; padding: 0; }
.search-hit { border-top: 1px dotted var(--soft-rule); }
.search-hit:first-child { border-top: 0; }
.search-hit > a { display: block; padding: 14px 0; text-decoration: none; }
.search-hit > a:hover strong { text-decoration: underline; text-underline-offset: 3px; }
.search-hit-top { display: flex; gap: 10px; align-items: center; font-family: var(--mono-font); font-size: 11px; color: var(--muted); }
.search-kind { font-family: var(--chrome-font); padding: 0 5px; border: 1px solid var(--soft-rule); }
.search-hit strong { display: block; margin: 4px 0; font-size: 17px; line-height: 1.5; }
.search-hit-text { display: block; font-size: 14px; line-height: 1.7; color: var(--muted); }
.search-hit-tags { display: block; margin-top: 4px; font-size: 12px; color: var(--muted); }
@media (max-width: 600px) {
  .search-main { flex-direction: column; }
  .search-form .btn { align-self: flex-start; }
}

.page-search .reading { grid-template-columns: minmax(0, 1fr); width: 100%; }
.page-search .win-search { width: 100%; }

/* 线索页 */
.thread-group h2 span { float: right; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.thread-intro { margin: 8px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.thread-all { margin: 10px 0 0; font-size: 13px; }
.thread-all a { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }

.tag-more { margin: 10px 0 0; font-size: 12px; }
.tag-more a { color: var(--muted); text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }

/* 标签页：紧凑列表与分页 */
.tag-intro { margin: 8px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.tag-pager { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-top: 18px; padding-top: 14px; border-top: 1px dotted var(--soft-rule); font-size: 13px; }
.tag-pager a { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }

/* 归档：年份索引与年度页 */
.year-list { list-style: none; margin: 20px 0 0; padding: 0; }
.year-list li { border-top: 1px dotted var(--soft-rule); }
.year-list li:first-child { border-top: 0; }
.year-list a {
  display: grid; grid-template-columns: 5.5em minmax(0, 1fr) auto; gap: 14px;
  align-items: baseline; padding: 13px 0; text-decoration: none;
}
.year-list a:hover .year-latest { text-decoration: underline; text-underline-offset: 3px; }
.year-num { font-family: var(--chrome-font); font-weight: var(--chrome-weight); font-size: 19px; }
.year-latest { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.year-count { font-family: var(--mono-font); font-size: 11px; color: var(--muted); }
.arc-back { margin: 0 0 18px; font-size: 13px; }
.arc-back a { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
.year-pager { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-top: 22px; padding-top: 14px; border-top: 1px dotted var(--soft-rule); font-size: 13px; }
.year-pager a { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
@media (max-width: 600px) {
  .year-list a { grid-template-columns: 4.6em minmax(0, 1fr); }
  .year-count { grid-column: 2; }
  .year-latest { white-space: normal; }
}

/* 404 */
.notfound-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }
.notfound-actions .btn { flex: 0 0 auto; text-align: center; }
.tag-count { margin: 6px 0 0; color: var(--muted); font-size: 13px; }

/* 阅读偏好与阅读工具 */
:root { --reading-scale: 1; }
:root[data-text-size="small"] { --reading-scale: .92; }
:root[data-text-size="large"] { --reading-scale: 1.08; }
:root[data-text-size="xlarge"] { --reading-scale: 1.16; }

.prose h3[id], .prose h4[id], .prose h5[id] { scroll-margin-top: calc(var(--menubar-h) + 18px); }
.toc { margin: 18px 0 0; border: 1px solid var(--soft-rule); background: var(--tint); font-size: 14px; line-height: 1.7; }
.toc summary { cursor: pointer; padding: 8px 12px; font-family: var(--chrome-font); font-weight: var(--chrome-weight); list-style: none; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary span { float: right; font-weight: 400; color: var(--muted); }
.toc ol { margin: 0; padding: 4px 16px 10px 34px; }
.toc li { margin: 3px 0; }
.toc .toc-l4, .toc .toc-l5 { margin-left: 1em; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; text-underline-offset: 3px; }

.msg-summary { display: none; margin: 0 0 6px; color: var(--muted); font-size: 15px; line-height: 1.7; }
:root[data-feed-density="compact"] .msg .prose-msg,
:root[data-feed-density="compact"] .msg .ledger { display: none; }
:root[data-feed-density="compact"] .msg-summary { display: block; }
:root[data-feed-density="compact"] .msg-title { margin-bottom: 5px; }
:root[data-feed-density="compact"] .msg .win-body { padding-bottom: 12px; }

.prose pre { position: relative; }
.code-copy {
  position: absolute; top: 7px; right: 8px; z-index: 2;
  padding: 3px 9px; border: 1px solid var(--soft-rule);
  background: var(--paper); color: var(--ink);
  font-family: var(--chrome-font); font-size: 11px; line-height: 1.5; cursor: pointer;
}
.code-copy:hover { background: var(--sel-bg); color: var(--sel-fg); }
.code-copy:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* 单篇系列内导航 */
.doc-series { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
.post-series { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 14px; line-height: 1.7; }
.post-series h2 { margin: 0 0 6px; font-size: 17px; }
.post-series h2 a { text-decoration: none; }
.post-series p { margin: 0; color: var(--muted); }
.post-series ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.post-series li { display: grid; grid-template-columns: 3.2em minmax(0, 1fr) auto; gap: 8px; align-items: baseline; }
.post-series li span { font-family: var(--chrome-font); font-size: 12px; color: var(--muted); }
.post-series li a { color: var(--ink); text-decoration: none; }
.post-series li a:hover { text-decoration: underline; }
.post-series time { font-family: var(--mono-font); font-size: 11px; color: var(--muted); }
.post-series-all { display: inline-block; margin-top: 10px; text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
@media (max-width: 600px) {
  .post-series li { grid-template-columns: 3.2em minmax(0, 1fr); }
  .post-series time { grid-column: 2; }
}

/* 搜索筛选与高亮 */
.search-filters {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  gap: 8px; align-items: end; margin-top: 10px;
}
.search-filters label {
  display: grid; gap: 3px; min-width: 0;
  font-family: var(--chrome-font); font-size: 11px; color: var(--muted);
}
.search-filters select {
  min-width: 0; width: 100%; padding: 5px 6px;
  font: inherit; font-size: 12px; color: var(--ink); background: var(--paper);
  border: 1px solid var(--win-border); border-radius: var(--btn-radius, 0);
}
.search-clear {
  padding: 5px 10px; font: inherit; font-size: 12px; color: var(--ink);
  background: var(--btn-bg); border: 1px solid var(--win-border);
  border-radius: var(--btn-radius, 0); cursor: pointer;
}
.search-clear:hover { background: var(--sel-bg); color: var(--sel-fg); }
.search-hints { margin: 8px 0 0; font-size: 13px; color: var(--muted); }
.search-hints a { text-decoration: none; border-bottom: 1px dotted var(--soft-rule); }
mark { background: #ffeb66; color: #111111; padding: 0 .08em; }
:root[data-mode="dark"] mark { background: #665700; color: #ffffff; }
.search-empty { padding: 18px 0; color: var(--muted); }
.search-empty p { margin: 0 0 8px; }
.search-empty .btn { display: inline-block; }
@media (max-width: 600px) {
  .search-filters { grid-template-columns: 1fr 1fr; }
  .search-clear { grid-column: 1 / -1; justify-self: start; }
}

/* 徽章页 */
.badge-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 22px; }
.badge-card { border: 1px solid var(--soft-rule); padding: 12px; background: var(--paper); min-width: 0; }
.badge-card h2 { margin: 0 0 8px; font-size: 15px; }
.badge-previews { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; min-height: 93px; }
.badge-previews img { max-width: 100%; height: auto; image-rendering: auto; }
.badge-3x { width: 264px; height: 93px; }
.badge-code { display: flex; align-items: flex-start; gap: 8px; margin-top: 8px; min-width: 0; }
.badge-code code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; padding: 4px 6px; border: 1px solid var(--soft-rule); background: var(--tint); font-family: var(--mono-font); font-size: 11px; }
.badge-code button { flex: none; padding: 3px 8px; border: 1px solid var(--soft-rule); background: var(--btn-bg); color: var(--ink); font-family: var(--chrome-font); font-size: 11px; cursor: pointer; }
.badge-code button:hover { background: var(--sel-bg); color: var(--sel-fg); }
@media (max-width: 700px) {
  .badge-grid { grid-template-columns: 1fr; }
  .badge-3x { width: 176px; height: 62px; }
}

/* ============================================================
   Platinum：按 Mac OS 8/9 和 exe / AI System 6 的实测配方重画。
   1px 黑框 + 2px 硬投影；4px 窗框；白/#777 的 2px 细纹标题列；
   13px 蚀刻关闭盒；3px 圆角、四层内斜面的按压按钮。
   ============================================================ */
:root[data-skin="platinum"] .win { position: relative; padding: 0 4px 4px; }
:root[data-skin="platinum"] .win-titlebar { margin: 0 -4px 4px; border-bottom: 0; }
:root[data-skin="platinum"] .win-title > span { padding: 0 3px; }
:root[data-skin="platinum"] .win-body {
  border: 1px solid #262626;
  box-shadow: -1px -1px 0 #999999, 1px 1px 0 #ffffff;
}
:root[data-skin="platinum"] .win-status {
  border: 1px solid #262626;
  border-top: 0;
  box-shadow: inset 1px 1px 0 rgba(255, 255, 255, .6), inset -1px -1px 0 #aaaaaa;
}
:root[data-skin="platinum"]:not([data-mode="dark"]) .win::before {
  content: "";
  position: absolute; inset: 0; z-index: 3; pointer-events: none;
  box-shadow: inset 1px 1px 0 rgba(255, 255, 255, .5), inset -1px -1px 0 #999999, inset 1px 1px 0 #ffffff;
}
:root[data-skin="platinum"]:not([data-mode="dark"]) .win-body {
  box-shadow: -1px -1px 0 #999999, 1px 1px 0 #ffffff;
}

/* 关闭盒 / 缩放盒：13px 蚀刻方块，9px 灰面，2px 黑圈，3px 内外斜面。 */
:root[data-skin="platinum"] .win-titlebar > .win-box,
:root[data-skin="platinum"] .win-close span,
:root[data-skin="platinum"] .win-zoom span {
  width: 13px; height: 13px;
  border: 0; border-radius: 0;
  background: linear-gradient(135deg, var(--tbox-a) 0%, var(--tbox-b) 100%) 50% / 9px 9px no-repeat;
  box-shadow:
    inset 1px 1px 0 var(--tbox-lo),
    inset -1px -1px 0 var(--tbox-hi),
    inset 0 0 0 2px var(--tbox-ring),
    inset 3px 3px 0 var(--tbox-hi),
    inset -3px -3px 0 var(--tbox-lo);
}
:root[data-skin="platinum"] .win-zoom span::after { content: none; }
:root[data-skin="platinum"] .win-close:hover span,
:root[data-skin="platinum"] .win-zoom:hover span { filter: brightness(.9); }
:root[data-skin="platinum"] .win-close:active span,
:root[data-skin="platinum"] .win-zoom:active span {
  background: linear-gradient(135deg, #353535cc 0%, #9c9c9ccc 100%) 50% / 9px 9px no-repeat;
}

/* 按钮：3px 圆角，黑边框，四层内斜面；悬停不反色，按下才反色。 */
:root[data-skin="platinum"] .btn {
  font-family: var(--chrome-font);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  padding: 5px 10px;
  border: 1px solid #262626;
  border-radius: 3px;
  box-shadow: var(--btn-shadow);
}
:root[data-skin="platinum"] .btn:hover { background: #e6e6e6; color: var(--ink); }
:root[data-skin="platinum"] .btn:active {
  background: #666666; color: #ffffff;
  box-shadow: inset 1px 1px 0 #444444, inset -1px -1px 0 #888888, inset 2px 2px 0 #555555, inset -2px -2px 0 #777777;
}
:root[data-skin="platinum"] :focus-visible { outline-color: #6666cc; }