/* ---------- 字体 ---------- */
@font-face{font-family:"ZCOOL QingKe HuangYou";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/zcool-qingke-huangyou-subset.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-style:normal;font-weight:400 600;font-display:swap;src:url(fonts/jetbrains-mono-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ---------- 颜色 ---------- */
:root{
  color-scheme:light;
  --bg:#ECEEF1; --surface:#FFFFFF; --surface-2:#F4F5F7;
  --ink:#14171B; --ink-2:#3F4650; --muted:#68717D;
  --line:#D0D5DC; --line-2:#E2E5EA;
  --stage:#E6E7EA;
  --well:#14171B; --key:#FFFFFF; --key-ink:#14171B; --key-sub:#68717D; --key-edge:#C5CAD2; --ebony:#14171B;
  --danger:#B3261E; --danger-bg:#FCECEA; --danger-line:#EDB4AE;
  --ok:#17693F; --ok-bg:#E7F4EC; --ok-line:#A8D5BB;
  /* 导线颜色：和实物一样，不随主题变 */
  --w-24v:#D8342B; --w-gnd:#1B1D21; --w-ret:#2B6FE0; --w-pwm:#F2C200;
  --w-sda:#1FA35B; --w-scl:#E8EAED; --w-3v3:#F07F13; --w-5v:#9B4DCA;
  --w-l:#7A4424; --w-n:#3FA9E0; --w-pe:#8DB510; --w-nc:#E26A6A;
  --w-stp:#E35D9E; --w-dir:#8C939C; --w-en:#16B3AC; --w-lim:#4B4FC4; --w-mot:#4A4F57; --w-dc:#202226;
  --w-ma1:#C8261F; --w-ma2:#6B3A1A; --w-mb1:#E0B81A; --w-mb2:#1FA35B;
  --shadow:0 1px 2px rgba(20,23,27,.06), 0 10px 28px rgba(20,23,27,.08);
  --r:14px;
  --sheet-h:46px; --sheet-bg:#DCDFE4;
  --f-display:"ZCOOL QingKe HuangYou","PingFang SC","Microsoft YaHei UI","Microsoft YaHei",sans-serif;
  --f-body:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei UI","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --f-mono:"JetBrains Mono","Cascadia Mono",Consolas,"Microsoft YaHei UI",monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0E1013; --surface:#171A1F; --surface-2:#1E2228;
    --ink:#EEF0F2; --ink-2:#C5CBD2; --muted:#8F99A5;
    --line:#2C323A; --line-2:#22272E;
    --stage:#C9CCD2;
    --well:#050607; --key:#2A2F37; --key-ink:#EEF0F2; --key-sub:#9AA4B0; --key-edge:#171A1F; --ebony:#050607;
    --danger:#FF8A80; --danger-bg:#2C1614; --danger-line:#5C2B27;
    --ok:#7FD6A4; --ok-bg:#11251A; --ok-line:#24503A;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 28px rgba(0,0,0,.35);
    --sheet-bg:#08090B;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0E1013; --surface:#171A1F; --surface-2:#1E2228;
  --ink:#EEF0F2; --ink-2:#C5CBD2; --muted:#8F99A5;
  --line:#2C323A; --line-2:#22272E;
  --stage:#C9CCD2;
  --well:#050607; --key:#2A2F37; --key-ink:#EEF0F2; --key-sub:#9AA4B0; --key-edge:#171A1F; --ebony:#050607;
  --danger:#FF8A80; --danger-bg:#2C1614; --danger-line:#5C2B27;
  --ok:#7FD6A4; --ok-bg:#11251A; --ok-line:#24503A;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 28px rgba(0,0,0,.35);
  --sheet-bg:#08090B;
}

/* ---------- 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;padding-bottom:calc(var(--sheet-h) + env(safe-area-inset-bottom,0px))}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit}
a{color:inherit}
.mono{font-family:var(--f-mono);font-size:.92em}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:4px}
.wrap{max-width:1500px;margin-inline:auto;padding-inline:clamp(16px,2.4vw,32px)}

/* ---------- 顶栏 ---------- */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:18px;height:52px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none;font-family:var(--f-display);font-weight:400;font-size:20px;letter-spacing:.02em;white-space:nowrap}
.brand svg{width:26px;height:22px;display:block}
.nav{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;margin-left:auto;min-width:0}
.nav::-webkit-scrollbar{display:none}
.nav a{flex:none;text-decoration:none;font-size:13.5px;color:var(--ink-2);padding:6px 11px;border-radius:999px;white-space:nowrap}
.nav a:hover{background:var(--surface);color:var(--ink)}

/* ---------- 工作区 ---------- */
.ws{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);scroll-margin-top:64px;margin-top:16px}
.keys{--n:13;position:relative;display:grid;grid-template-columns:repeat(var(--n),minmax(0,1fr));gap:2px;background:var(--well);padding:0 2px 7px}
.key{appearance:none;border:0;background:var(--key);color:var(--key-ink);height:70px;border-radius:0 0 7px 7px;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:1px;padding:0 2px 8px;cursor:pointer;box-shadow:inset 0 -4px 0 var(--key-edge);transition:transform .09s ease,background .15s ease,box-shadow .09s ease;min-width:0}
.key:hover{transform:translateY(1px);box-shadow:inset 0 -3px 0 var(--key-edge)}
.key .k-n{font-family:var(--f-mono);font-size:11.5px;color:var(--key-sub);line-height:1.2}
.key .k-t{font-size:13px;font-weight:600;white-space:nowrap;line-height:1.3;max-width:100%;overflow:hidden}
.key[aria-selected="true"]{background:var(--ink);color:var(--bg);transform:translateY(4px);box-shadow:none}
.key[aria-selected="true"] .k-n{color:inherit;opacity:.7}
.key:focus-visible{outline-offset:-4px;border-radius:0 0 7px 7px}
.bk{position:absolute;top:0;width:calc(100%/var(--n)*.44);height:30px;background:var(--ebony);border-radius:0 0 4px 4px;pointer-events:none;transform:translateX(-50%);box-shadow:0 2px 0 rgba(0,0,0,.25)}

.ws-main{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,430px);height:clamp(520px,calc(100vh - 150px - var(--sheet-h)),900px)}
.stage-col{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--surface)}
.stage{position:relative;flex:1;min-height:0;background:var(--stage);overflow:hidden;isolation:isolate}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none;cursor:grab}
.stage canvas:active{cursor:grabbing}
.leaders{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.leaders line{stroke:#14171B;stroke-width:1;opacity:.6}
.leaders circle{fill:#14171B}
.labels{position:absolute;inset:0;pointer-events:none}
.lb{position:absolute;left:0;top:0;background:#FFFFFF;color:#14171B;border:1px solid #14171B;border-radius:6px;padding:3px 8px 4px;font-size:12.5px;line-height:1.3;white-space:nowrap;box-shadow:0 2px 8px rgba(0,0,0,.18);will-change:transform}
.lb b{font-weight:700}
.lb small{display:block;font-family:var(--f-mono);font-size:11px;color:#5A626D}
.lb.lb-warn{border-color:#B3261E;color:#B3261E}
.lb.lb-warn small{color:inherit}
.lb i{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px;background:var(--c);box-shadow:0 0 0 1px rgba(20,23,27,.35)}
.no-labels .labels,.no-labels .leaders{display:none}

.hud{position:absolute;z-index:3;display:flex;gap:6px;flex-wrap:wrap}
.hud-tr{right:12px;top:12px;left:12px;justify-content:flex-end}
.hud-bl{left:12px;bottom:12px;right:12px;align-items:flex-end;pointer-events:none}
.hud-bl > *{pointer-events:auto}
.tool{appearance:none;border:1px solid #C9CED6;background:#FFFFFF;color:#2B3038;border-radius:9px;padding:5px 11px;font-size:13px;font-weight:600;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.12);white-space:nowrap}
.tool:hover{border-color:#14171B;color:#14171B}
.tool[aria-pressed="true"],.tool.play{background:#14171B;color:#FFFFFF;border-color:#14171B}
.now{font-family:var(--f-mono);font-size:12.5px;background:#14171B;color:#FFFFFF;border-radius:8px;padding:3px 10px;display:flex;flex-wrap:wrap;gap:2px 14px}
.now span{white-space:nowrap}
.now .vel{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px;vertical-align:0}
.info{position:relative;width:min(310px,100%);background:#FFFFFF;color:#14171B;border:1px solid #14171B;border-radius:12px;padding:11px 14px 12px;box-shadow:0 8px 28px rgba(0,0,0,.25);font-size:13.5px;line-height:1.55}
.info h4{font-size:16px;font-weight:700;line-height:1.3;padding-right:30px}
.info .spec{font-family:var(--f-mono);font-size:12px;color:#5A626D}
.info ul{margin-top:6px;display:grid;gap:1px}
.info dl{margin-top:6px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:2px 10px}
.info dt{color:#5A626D}
.info .x{position:absolute;right:8px;top:8px;width:28px;height:28px;border:0;background:transparent;border-radius:8px;cursor:pointer;font-size:18px;line-height:1;color:#5A626D}
.info .x:hover{background:#F0F1F3;color:#14171B}
.fallback{position:absolute;inset:0;display:grid;place-content:center;gap:10px;text-align:center;padding:24px;background:var(--stage);color:#14171B;z-index:2}
.fallback h3{font-size:20px;font-weight:700}

/* 图例 */
.legend{border-top:1px solid var(--line);padding:8px 12px;display:flex;flex-wrap:wrap;gap:5px 6px;align-items:center;background:var(--surface)}
.chip{appearance:none;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:2px 10px 2px 7px;font-size:12.5px;color:var(--ink-2);cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.chip i{width:18px;height:7px;border-radius:3px;background:var(--c);flex:none;box-shadow:0 0 0 1px color-mix(in srgb,var(--ink) 35%,transparent)}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}

/* 右侧说明 */
.panel{border-left:1px solid var(--line);display:flex;flex-direction:column;min-height:0;min-width:0}
.panel-scroll{overflow:auto;flex:1;padding:18px 20px 22px;scrollbar-width:thin}
.step-no{font-family:var(--f-mono);font-size:12px;color:var(--muted);letter-spacing:.04em}
.panel h2{font-family:var(--f-display);font-weight:400;font-size:28px;line-height:1.2;margin-top:2px}
.say{margin-top:10px;display:grid;gap:3px;font-size:15.5px}
.blk{margin-top:18px}
.blk h3{font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--muted);margin-bottom:6px}
.blk ol{counter-reset:n;display:grid;gap:5px}
.blk ol > li{counter-increment:n;display:grid;grid-template-columns:22px minmax(0,1fr);gap:9px;align-items:baseline}
.blk ol > li::before{content:counter(n);font-family:var(--f-mono);font-size:12px;font-weight:600;color:var(--muted);text-align:right}
.blk ul{display:grid;gap:3px}
.box{border-radius:10px;padding:10px 14px 11px;border:1px solid var(--line)}
.box-warn{background:var(--danger-bg);border-color:var(--danger-line)}
.box-warn h3{color:var(--danger)}
.box-check{background:var(--ok-bg);border-color:var(--ok-line)}
.box-check h3{color:var(--ok)}
.wt{white-space:nowrap;font-weight:600}
.wt::before{content:"";display:inline-block;width:.62em;height:.62em;border-radius:50%;background:var(--c);margin-right:.3em;box-shadow:0 0 0 1px color-mix(in srgb,var(--ink) 35%,transparent)}
.tb{width:100%;border-collapse:collapse;font-size:13.5px;font-variant-numeric:tabular-nums}
.tb th,.tb td{text-align:left;padding:5px 10px 5px 0;border-bottom:1px solid var(--line-2);vertical-align:top}
.tb th{font-size:12px;color:var(--muted);font-weight:600}
.tb td.q{font-family:var(--f-mono);white-space:nowrap;text-align:right;padding-right:0}
.tb td.m{font-family:var(--f-mono);font-size:12.5px;color:var(--ink-2)}
.tb tr.go{cursor:pointer}
.tb tr.go:hover td{background:var(--surface-2)}
.tb tr.go[aria-pressed="true"] td{background:var(--ink);color:var(--bg)}
.tb tr.go[aria-pressed="true"] td.m{color:inherit}
.tb .sw{display:inline-block;width:22px;height:7px;border-radius:3px;background:var(--c);vertical-align:1px;box-shadow:0 0 0 1px color-mix(in srgb,var(--ink) 35%,transparent)}
.panel-foot{border-top:1px solid var(--line);padding:11px 14px;display:flex;gap:9px;background:var(--surface)}
.btn{appearance:none;border:1.5px solid var(--ink);border-radius:10px;padding:9px 14px;font-weight:700;font-size:14px;cursor:pointer;background:var(--surface);color:var(--ink);min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-decoration:none;text-align:center}
.btn:hover{background:var(--surface-2)}
.btn-main{background:var(--ink);color:var(--bg);flex:1}
.btn-main:hover{background:var(--ink-2);border-color:var(--ink-2)}
.btn:disabled{opacity:.35;cursor:default}
.btn-s{padding:5px 12px;font-size:13px;border-width:1px}

/* ---------- 下面的章节 ---------- */
.sec{padding-block:48px 0;scroll-margin-top:58px}
.sec > h2{font-family:var(--f-display);font-weight:400;font-size:clamp(24px,3vw,32px);line-height:1.2;margin-bottom:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);min-width:0}
.two{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:20px;align-items:start}
.pad{padding:18px 20px}
.two > *,.cols > *{min-width:0}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:20px;align-items:start}
.card > h3{font-size:15px;font-weight:700;padding:12px 18px;border-bottom:1px solid var(--line);background:var(--surface-2);border-radius:var(--r) var(--r) 0 0;display:flex;justify-content:space-between;gap:12px;align-items:baseline}
.card > h3 span{font-family:var(--f-mono);font-size:12px;color:var(--muted);font-weight:400}
.card .tb{font-size:14px}
.card .tb th,.card .tb td{padding:8px 18px}
.card .tb th{background:transparent}
.card .tb tr:last-child td{border-bottom:0}
.tbl-wrap{overflow-x:auto}

/* 图纸：白底，颜色和实物一致 */
.paper{background:#FFFFFF;color:#14171B;border:1px solid var(--line);border-radius:var(--r);padding:14px;overflow-x:auto}
.dg{display:block;width:100%;min-width:760px;height:auto}
.dg text,.cx text{font-family:var(--f-body);font-size:15px;fill:#14171B}
.dg .t-b,.cx .t-b{font-weight:700;font-size:16px}
.dg .t-s,.cx .t-s{font-family:var(--f-mono);font-size:12px;fill:#5A626D}
.dg .t-p,.cx .t-p{font-family:var(--f-mono);font-size:12px;font-weight:600}
.dg .bx,.cx .bx{fill:#F4F5F7;stroke:#14171B;stroke-width:1.6}
.dg .bx-dash{fill:none;stroke:#68717D;stroke-width:1.4;stroke-dasharray:7 6}
.dg .w,.cx .w{fill:none;stroke-width:3.2;stroke-linecap:round;stroke-linejoin:round}
.dg .w.bus,.cx .w.bus{stroke-width:7}
.dg .sym,.cx .sym{fill:none;stroke:#14171B;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.dg .sym-f{fill:#14171B;stroke:none}
[data-w="v24"]{stroke:var(--w-24v)} [data-w="ret"]{stroke:var(--w-ret)} [data-w="gnd"]{stroke:var(--w-gnd)}
[data-w="pwm"]{stroke:var(--w-pwm)} [data-w="sda"]{stroke:var(--w-sda)} [data-w="scl"]{stroke:#9AA3AE}
[data-w="v33"]{stroke:var(--w-3v3)} [data-w="v5"]{stroke:var(--w-5v)} [data-w="acl"]{stroke:var(--w-l)}
[data-w="acn"]{stroke:var(--w-n)} [data-w="pe"]{stroke:var(--w-pe)}
[data-w="stp"]{stroke:var(--w-stp)} [data-w="dir"]{stroke:var(--w-dir)} [data-w="en"]{stroke:var(--w-en)} [data-w="lim"]{stroke:var(--w-lim)}
[data-w="mot"]{stroke:var(--w-mot)} [data-w="dc"]{stroke:var(--w-dc)} [data-w="ma1"]{stroke:var(--w-ma1)} [data-w="ma2"]{stroke:var(--w-ma2)}
[data-w="mb1"]{stroke:var(--w-mb1)} [data-w="mb2"]{stroke:var(--w-mb2)}
circle[data-w]{stroke:none}
circle[data-w="v24"]{fill:var(--w-24v)} circle[data-w="ret"]{fill:var(--w-ret)} circle[data-w="gnd"]{fill:var(--w-gnd)} circle[data-w="pwm"]{fill:var(--w-pwm)}
.cx{display:block;width:100%;height:auto;min-width:520px}
.cx .t-v{font-family:var(--f-mono);font-size:13px;font-weight:600}
.cx .flow{fill:none;stroke:#FFFFFF;stroke-width:4.5;stroke-linecap:round;stroke-dasharray:.1 17;animation:flow 1s linear infinite}
.cx .zap{fill:#B3261E;stroke:none}
.cx .t-zap{fill:#B3261E;font-weight:700;font-size:15px}
.cx [data-show]{display:none}
.cx[data-state="on"] [data-show~="on"],.cx[data-state="fw"] [data-show~="fw"],.cx[data-state="bad"] [data-show~="bad"]{display:inline}
.cx[data-state="bad"] .dio{opacity:.16}
@keyframes flow{to{stroke-dashoffset:-17.1}}
.states{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.states .tool{box-shadow:none}
.sayb{margin-top:12px;padding:10px 14px;border-radius:10px;background:var(--surface-2);min-height:9.4em}
.sayb b{display:block;margin-bottom:2px}
.pwm{display:block;width:100%;height:auto;min-width:500px}
.pwm text{font-family:var(--f-body);font-size:12.5px;fill:#3F4650}
.pwm .ax{stroke:#C9CED6;stroke-width:1;fill:none}
.pwm .grid{stroke:#E2E5EA;stroke-width:1;stroke-dasharray:3 4;fill:none}
.pwm .s1{stroke:#14171B;stroke-width:2.4;fill:none;stroke-linejoin:round;stroke-linecap:round}
.pwm .s2{stroke:#68717D;stroke-width:2;fill:none;stroke-dasharray:5 5;stroke-linejoin:round}
.pwm .t-k{font-weight:700;fill:#14171B}
.pwm .br{stroke:#68717D;stroke-width:1.2;fill:none}

/* 清单 */
.chk{display:grid;grid-template-columns:26px minmax(0,1fr);gap:0 12px;padding:9px 18px;border-bottom:1px solid var(--line-2);cursor:pointer}
.chk:last-child{border-bottom:0}
.chk:hover{background:var(--surface-2)}
.chk input{width:18px;height:18px;margin:3px 0 0;accent-color:var(--ink);cursor:pointer}
.chk.on span{text-decoration:line-through;color:var(--muted)}
.bom td:first-child{width:34px;padding-right:0}
.bom input{width:17px;height:17px;accent-color:var(--ink);cursor:pointer;vertical-align:-3px}
.bom tr.on td:nth-child(2){text-decoration:line-through;color:var(--muted)}
.bom .see{appearance:none;border:1px solid var(--line);background:transparent;border-radius:6px;font-size:12px;padding:1px 8px;cursor:pointer;color:var(--ink-2);white-space:nowrap}
.bom .see:hover{border-color:var(--ink);color:var(--ink)}
.pads{display:inline-flex;gap:3px;vertical-align:-2px}
.pads i{width:13px;height:13px;border-radius:3px;border:1.5px solid var(--muted);display:block}
.pads i.s{background:var(--ink);border-color:var(--ink)}
.faq details{border-bottom:1px solid var(--line-2)}
.faq details:last-child{border-bottom:0}
.faq summary{list-style:none;cursor:pointer;padding:12px 46px 12px 18px;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-family:var(--f-mono);font-size:20px;color:var(--muted)}
.faq details[open] summary::after{content:"-"}
.faq summary:hover{background:var(--surface-2)}
.faq ol{padding:0 18px 14px 18px;display:grid;gap:2px;counter-reset:f}
.faq li{counter-increment:f;display:grid;grid-template-columns:20px minmax(0,1fr);gap:8px}
.faq li::before{content:counter(f);font-family:var(--f-mono);font-size:12px;color:var(--muted);padding-top:2px}
.dict{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:0 28px}
.dict > div{padding:11px 0;border-bottom:1px solid var(--line)}
.dict dt{font-weight:700}
.dict dd{color:var(--ink-2);font-size:14.5px}
/* ---------- 底部方案标签：像 Excel 的工作表 ---------- */
.sheetbar{position:fixed;left:0;right:0;bottom:0;z-index:45;background:var(--sheet-bg);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px);padding-left:env(safe-area-inset-left,0px)}
.sheetbar-in{display:flex;align-items:stretch;height:var(--sheet-h);padding-left:14px}
.sheet-lb{flex:none;display:flex;align-items:center;padding-right:14px;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--muted)}
.sheet-tabs{display:flex;align-items:flex-start;overflow-x:auto;scrollbar-width:none;min-width:0}
.sheet-tabs::-webkit-scrollbar{display:none}
.sheet{appearance:none;flex:none;position:relative;height:calc(var(--sheet-h) - 7px);margin-top:-1px;padding:0 22px;border:1px solid transparent;border-top:0;border-radius:0 0 9px 9px;background:transparent;color:var(--ink-2);font-size:14.5px;font-weight:600;white-space:nowrap;cursor:pointer}
.sheet + .sheet::before{content:"";position:absolute;left:-1px;top:9px;bottom:9px;width:1px;background:var(--line)}
.sheet:hover{color:var(--ink);background:color-mix(in srgb,var(--surface) 55%,transparent)}
.sheet[aria-selected="true"]{background:var(--surface);color:var(--ink);font-weight:700;border-color:var(--line);box-shadow:0 3px 8px rgba(20,23,27,.10)}
.sheet[aria-selected="true"]::after{content:"";position:absolute;left:14px;right:14px;bottom:6px;height:3px;border-radius:2px;background:var(--ink)}
.sheet[aria-selected="true"]::before,.sheet[aria-selected="true"] + .sheet::before{display:none}
.sheet:focus-visible{outline-offset:-3px}

.foot{margin-top:56px;border-top:1px solid var(--line);padding-block:20px 40px;color:var(--muted);font-size:13px;display:grid;gap:2px}

/* ---------- 窄屏 ---------- */
@media (max-width:1000px){
  .ws-main{grid-template-columns:minmax(0,1fr);height:auto}
  .stage{flex:none;height:min(64vh,600px);min-height:360px}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .panel-scroll{overflow:visible}
  .panel-foot{position:sticky;bottom:calc(var(--sheet-h) + env(safe-area-inset-bottom,0px));z-index:5}
  .two{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  .key{height:52px;padding-bottom:7px}
  .key .k-t{display:none}
  .key .k-n{font-size:12.5px;color:var(--key-ink)}
  .key[aria-selected="true"] .k-n{opacity:1}
  .bk{height:20px}
  .panel-scroll{padding:16px 16px 20px}
  .lb{font-size:11.5px;padding:2px 6px 3px}
  .card .tb th,.card .tb td{padding:7px 12px}
  .sheet{padding:0 10px;font-size:13px}
  .sheetbar-in{padding-left:6px}
  .sheet-lb{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}