/* == 00 FONTS == 自托管 IBM Plex（仅 latin 子集，中文回退系统栈） */
@font-face{
  font-family:"IBM Plex Sans";
  font-style:normal;font-weight:400 600;font-display:swap;
  src:url(fonts/ibm-plex-sans-var.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:"IBM Plex Mono";
  font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/ibm-plex-mono-400.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:"IBM Plex Mono";
  font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/ibm-plex-mono-500.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

/* == 01 TOKENS == 设计令牌 · 铭牌（Nameplate）系统 v2 */
:root{
  /* 色彩（暗色=铸铁） */
  --se-bg-0:#0A0B0D; --se-bg-1:#101215; --se-bg-2:#16191D;
  --se-text-1:#ECEAE4; --se-text-2:#9A9DA3; --se-line:rgba(255,255,255,.08);
  --se-accent:#6BC0A4; --se-accent-down:#54A186;
  --se-grid:rgba(255,255,255,.06);
  --se-radius:14px;
  --se-radius-sm:10px;
  /* 文档页扩展令牌 */
  --se-doc-width:72ch;
  --se-toc-width:224px;
  --se-code-bg:var(--se-bg-2);
  /* 动效令牌（工业仪器感） */
  --se-dur-fast:150ms; --se-dur-mid:400ms; --se-dur-slow:700ms;
  --se-ease-out:cubic-bezier(.2,.7,.3,1);
  --se-stagger:80ms;
  /* 超大排版 */
  --se-ghost:clamp(72px,12vw,180px);
  /* 语法高亮（金属氧化色环） */
  --se-syn-comment:#6E7478;
  --se-syn-keyword:#5FA48F;
  --se-syn-string:#B5A26B;
  --se-syn-number:#C48A6A;
  --se-syn-func:#A9B4A0;
  --se-syn-punct:#D8D6CF;
  --se-syn-meta:#8C8F93;
  /* 字体 */
  --se-font:"IBM Plex Sans","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --se-mono:"IBM Plex Mono","Sarasa Mono SC","PingFang SC",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
html[data-theme="light"]{
  --se-bg-0:#FAFAF7; --se-bg-1:#F0F0EB; --se-bg-2:#E6E6DF;
  --se-text-1:#1A1C1E; --se-text-2:#6B6E73; --se-line:rgba(0,0,0,.08);
  --se-accent:#1F7A5C; --se-accent-down:#17624A;
  --se-grid:rgba(0,0,0,.05);
  --se-syn-comment:#7A776E;
  --se-syn-keyword:#2E6B58;
  --se-syn-string:#8A6D2F;
  --se-syn-number:#9C5B33;
  --se-syn-func:#4E5D48;
  --se-syn-punct:#26292B;
  --se-syn-meta:#6B6E70;
}

/* == 02 BASE == 基础与全局 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:clip}
body{
  font-family:var(--se-font);font-size:17.5px;line-height:1.7;
  color:var(--se-text-1);background-color:var(--se-bg-0);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.2;font-weight:600}
a{color:inherit}
button{font-family:inherit;cursor:pointer}
img,svg{display:block;max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--se-mono)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:16px;top:-48px;z-index:100;background:var(--se-accent);color:var(--se-bg-0);
  padding:8px 16px;border-radius:2px;font-size:14px;text-decoration:none;transition:top 150ms ease-out}
.skip-link:focus{top:8px}
:focus-visible{outline:2px solid var(--se-accent);outline-offset:2px}
::selection{background:var(--se-accent);color:var(--se-bg-0)}
a,button,[role="button"],summary,input,textarea{-webkit-tap-highlight-color:transparent}
a,button,[role="button"]{-webkit-touch-callout:none}
/* 触摸主动反馈（替代系统蓝框；键盘焦点环由 :focus-visible 承担） */
.btn:active,.cmd-row:active,.drawer-link:active,.doc-card:active,.pager-link:active{background:var(--se-bg-2)}
.nav-link:active,.doc-link:active,.toc-list a:active{color:var(--se-accent)}
[id]{scroll-margin-top:76px}
@media (min-width:1024px){[id]{scroll-margin-top:88px}}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* == 03 COMPONENTS == 组件 v2（反模板化构型 + 动效系统）
 * 断点体系：640 / 1024 / 1440（移动优先）
 * 分区构型：大字报(PAIN) / 规格铭牌条(LANGUAGE) / 交错双栏(REPRO) /
 *          seq 时间轴(PROTOCOL) / 幽灵编号+窄条(SAFETY) / 命令条(QUICKSTART)
 */
/* ---------- 滚动进度线 ---------- */
.progress{position:fixed;top:0;left:0;right:0;height:1px;background:var(--se-accent);
  transform:scaleX(0);transform-origin:left;z-index:60;pointer-events:none}
/* ---------- 徽章 / 按钮 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--se-mono);font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--se-line);border-radius:2px;
  padding:8px 14px;color:var(--se-text-2);background:var(--se-bg-1);
  font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:500;
  min-height:44px;padding:11px 24px;border-radius:2px;text-decoration:none;border:1px solid transparent;
  transition:background-color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out,color var(--se-dur-fast) ease-out}
.btn-primary{background:var(--se-accent);border-color:var(--se-accent);color:var(--se-bg-0)}
.btn-primary:hover{background:var(--se-accent-down);border-color:var(--se-accent-down)}
.btn-ghost{background:transparent;border-color:var(--se-line);color:var(--se-text-1)}
.btn-ghost:hover{background:var(--se-bg-2)}
/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;height:56px;background:var(--se-bg-0);
  border-bottom:1px solid var(--se-line)}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:100%;
  display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-block{width:8px;height:8px;background:var(--se-accent);border-radius:2px;flex-shrink:0}
.logo-text{font-family:var(--se-mono);font-size:15px;letter-spacing:.04em;font-weight:500}
.nav-links{display:none}
.theme-toggle{width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--se-line);border-radius:2px;color:var(--se-text-2);
  font-family:var(--se-mono);font-size:14px;transition:color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.theme-toggle:hover{color:var(--se-text-1);border-color:var(--se-text-2)}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
/* 汉堡 → ✕ 形变动画 */
.menu-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--se-line);border-radius:2px;color:var(--se-text-1)}
.menu-ico{position:relative;display:block;width:16px;height:2px;background:currentColor;
  transition:background-color var(--se-dur-fast) ease-out}
.menu-ico::before,.menu-ico::after{content:"";position:absolute;left:0;width:16px;height:2px;
  background:currentColor;transition:transform var(--se-dur-mid) var(--se-ease-out),top var(--se-dur-mid) var(--se-ease-out)}
.menu-ico::before{top:-5px}
.menu-ico::after{top:5px}
.menu-btn[aria-expanded="true"] .menu-ico{background:transparent}
.menu-btn[aria-expanded="true"] .menu-ico::before{top:0;transform:rotate(45deg)}
.menu-btn[aria-expanded="true"] .menu-ico::after{top:0;transform:rotate(-45deg)}
/* 移动端抽屉：滑入 + 级联入场 */
.drawer{position:fixed;inset:56px 0 0 0;z-index:49;background:var(--se-bg-0);
  padding:16px 24px 32px;overflow-y:auto;overscroll-behavior:contain;
  visibility:hidden;transform:translateX(102%);
  transition:transform var(--se-dur-mid) var(--se-ease-out),visibility 0s linear var(--se-dur-mid)}
.drawer.open{visibility:visible;transform:none;
  transition:transform var(--se-dur-mid) var(--se-ease-out)}
.drawer-link{display:flex;align-items:center;gap:16px;min-height:52px;
  border-bottom:1px solid var(--se-line);text-decoration:none;font-size:16px;
  opacity:0;transform:translateX(16px);
  transition:opacity var(--se-dur-mid) var(--se-ease-out),transform var(--se-dur-mid) var(--se-ease-out),
    color var(--se-dur-fast) ease-out;
  transition-delay:calc(var(--i,0)*50ms)}
.drawer.open .drawer-link{opacity:1;transform:none}
.drawer-link .dl-no{font-family:var(--se-mono);font-size:12px;color:var(--se-accent);letter-spacing:.08em}
.drawer-link:hover{color:var(--se-accent)}
body.drawer-open{overflow:hidden}
html.drawer-open{overflow:hidden}
/* 抽屉打开时导航栏固定，任何滚动环境下都不跟随 */
body.drawer-open .nav{position:fixed;top:0;left:0;right:0}
@media (prefers-reduced-motion:reduce){
  .drawer,.drawer-link{transition:none;opacity:1;transform:none}
}
@media (min-width:640px){
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;overflow-x:auto;
    white-space:nowrap;scrollbar-width:none;-ms-overflow-style:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-link{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
    text-decoration:none;color:var(--se-text-2);padding:0 12px;height:40px;display:inline-flex;
    align-items:center;border-radius:2px;flex-shrink:0;transition:color var(--se-dur-fast) ease-out}
  .nav-link:hover{color:var(--se-text-1)}
  .nav-link[aria-current="true"]{color:var(--se-accent)}
  .menu-btn,.drawer{display:none}
  .nav-actions{margin-left:0}
}
/* ---------- HERO ---------- */
.hero{position:relative;padding:72px 0 48px;overflow:hidden}
.hero-grid{display:grid;gap:40px;align-items:center}
.hero-plate{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--se-text-2);display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  font-variant-numeric:tabular-nums}
.hero-plate .dot{color:var(--se-line)}
.hero h1{font-size:clamp(30px,8vw,44px);margin:20px 0}
.hero-sub{color:var(--se-text-2);max-width:34em;margin-bottom:32px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
@media (min-width:640px){
  .hero{padding:96px 0 72px}
}
@media (min-width:1024px){.hero-grid{grid-template-columns:45% 55%;gap:48px}}
/* 终端模拟（打字机） */
.term{background:var(--se-bg-2);border:1px solid var(--se-line);border-radius:2px;overflow:hidden}
.term-head{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;
  border-bottom:1px solid var(--se-line);font-family:var(--se-mono);font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--se-text-2)}
.term-body{padding:16px;font-family:var(--se-mono);font-size:14px;line-height:1.6;min-height:230px;
  display:flex;flex-direction:column;gap:2px;overflow-x:auto;
  -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 20px),transparent);
  mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 20px),transparent)}
@media (min-width:640px){.term-body{-webkit-mask-image:none;mask-image:none;font-size:13px}}
.tl{display:block;white-space:pre}
.tl .p,.tl.ok{color:var(--se-accent)}
.tl.dim{color:var(--se-text-2)}
.tl .cur{display:inline-block;width:8px;height:15px;background:var(--se-accent);
  vertical-align:-2px;animation:seBlink 1.1s steps(2) infinite}
@keyframes seBlink{0%,49%{opacity:1}50%,100%{opacity:0}}
/* ---------- 分区通用 ---------- */
.sec{position:relative;padding:56px 0;overflow:hidden}
.sec::before,.sec::after{content:"";position:absolute;top:0;width:1px;height:6px;background:var(--se-text-2)}
.sec::before{left:0}
.sec::after{right:0}
.sec + .sec{border-top:1px solid var(--se-line)}
.sec-head{position:relative;display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.sec-no{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;color:var(--se-accent);flex-shrink:0}
.sec-head h2{font-size:22px;position:relative;padding-bottom:12px}
.sec-head h2::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--se-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--se-dur-slow) var(--se-ease-out)}
.sec-head.in h2::after{transform:scaleX(1)}
.sec-side{margin-left:auto;font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2)}
/* 头部构型 B：标题右对齐 */
.sec-head--flip .sec-side{order:-1;margin-left:0}
.sec-head--flip h2{margin-left:auto;text-align:right}
.sec-head--flip h2::after{transform-origin:right}
/* 头部构型 C：编号隐去，由幽灵编号承担 */
.sec-head--ghost .sec-no{display:none}
@media (min-width:640px){
  .sec{padding:96px 0}
  .sec-head{margin-bottom:40px}
  .sec-head h2{font-size:28px}
}
/* 幽灵超大排版（已按反馈移除装饰字；保留令牌供后续使用） */
.sec .wrap{position:relative;z-index:1}
/* ---------- 滚动入场（staggered reveal）---------- */
.rv{transition:opacity 450ms cubic-bezier(.22,.61,.36,1),transform 450ms cubic-bezier(.22,.61,.36,1);
  transition-delay:calc(var(--i,0)*var(--se-stagger))}
html.js .rv:not(.in){opacity:0;transform:translateY(14px)}
/* ---------- 移动端访问提示条 ---------- */
.mobile-hint{position:fixed;left:16px;right:16px;bottom:16px;z-index:48;
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  background:var(--se-bg-1);border:1px solid var(--se-line);border-left:2px solid var(--se-accent);
  border-radius:2px;padding:12px 16px;
  opacity:0;transform:translateY(16px);visibility:hidden;
  transition:opacity var(--se-dur-mid) var(--se-ease-out),transform var(--se-dur-mid) var(--se-ease-out),visibility 0s linear var(--se-dur-mid)}
.mobile-hint.show{opacity:1;transform:none;visibility:visible;
  transition:opacity var(--se-dur-mid) var(--se-ease-out),transform var(--se-dur-mid) var(--se-ease-out)}
.mh-text{font-size:13.5px;color:var(--se-text-2);flex:1;min-width:200px;line-height:1.6;margin:0}
.mh-tag{font-family:var(--se-mono);font-size:11px;letter-spacing:.08em;color:var(--se-accent);
  border:1px solid var(--se-line);border-radius:2px;padding:2px 6px;margin-right:8px;
  text-transform:uppercase;white-space:nowrap}
.mh-close{flex-shrink:0;min-height:44px;padding:8px 18px;border-radius:2px;
  font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  background:var(--se-accent);border:1px solid var(--se-accent);color:var(--se-bg-0);
  transition:background-color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.mh-close:hover{background:var(--se-accent-down);border-color:var(--se-accent-down)}
@media (max-width:479px){.mh-close{width:100%}}
/* ---------- 溢出根治：栅格子项最小宽度归零 ---------- */
.run-code,.run-text,.proto-grid>*,.doc-layout>*,.hero-grid>*,.safety-grid>*,.docs-grid>*,.doc-pager>*{min-width:0}
/* ---------- PAIN：大字报纵列 ---------- */
.pain-list{position:relative}
.pain-list::after{content:"";position:absolute;top:0;bottom:0;right:0;width:1px;background:var(--se-line)}
.pain-item{position:relative;display:grid;grid-template-columns:auto 1fr;gap:8px 20px;
  padding:28px 24px 28px 0;border-bottom:1px solid var(--se-line)}
.pain-item:last-child{border-bottom:0}
.pain-no{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;color:var(--se-accent);
  padding-top:10px;grid-row:1}
.pain-item h3{font-size:clamp(20px,5.5vw,32px);line-height:1.2}
.pain-item p{color:var(--se-text-2);grid-column:2;max-width:38em}
.pain-tag{grid-column:2;margin-top:8px;font-family:var(--se-mono);font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--se-accent)}
@media (min-width:1024px){.pain-item{gap:8px 32px}}
/* ---------- LANGUAGE：代码 + 规格铭牌条 ---------- */
.spec-dl{margin-top:40px;border-top:1px solid var(--se-line)}
.spec-row{display:grid;grid-template-columns:1fr;gap:2px;padding:12px 0;
  border-bottom:1px solid var(--se-line);transition:background-color var(--se-dur-fast) ease-out}
.spec-row:hover{background:var(--se-bg-1)}
.spec-row dt{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2)}
.spec-row dd{font-family:var(--se-mono);font-size:14.5px;color:var(--se-accent)}
.spec-row dd b{color:var(--se-text-1);font-weight:400}
@media (min-width:640px){
  .spec-row{grid-template-columns:200px 1fr;align-items:baseline;padding:14px 0;gap:24px}
}
/* ---------- 代码块 ---------- */
.code{background:var(--se-code-bg);border:1px solid var(--se-line);border-left:2px solid var(--se-accent);
  border-radius:2px;overflow:hidden}
.code-head{display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:8px 12px 8px 16px;border-bottom:1px solid var(--se-line)}
.code-file{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--se-text-2)}
.copy-btn{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  background:transparent;border:1px solid var(--se-line);border-radius:2px;color:var(--se-text-2);
  padding:8px 12px;min-height:36px;white-space:nowrap;
  transition:color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.copy-btn:hover{color:var(--se-text-1);border-color:var(--se-text-2)}
.copy-btn.copied{color:var(--se-accent);border-color:var(--se-accent)}
.code-scroll{overflow-x:auto}
.code-body{padding:16px;font-family:var(--se-mono);font-size:14px;line-height:1.9;min-width:max-content}
.cl{display:flex}
.cl .ln{flex-shrink:0;width:2.5ch;text-align:right;padding-right:20px;color:var(--se-text-2);
  user-select:none;-webkit-user-select:none}
.cl .tx{white-space:pre}
/* 移动端：文件名与复制按钮分行 + 右缘渐隐 */
@media (max-width:639px){
  .code-head{flex-wrap:wrap;row-gap:0}
  .code-file{width:100%}
  .copy-btn{margin-left:auto;border:0;border-bottom:0}
  .code-scroll{-webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 24px),transparent);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 24px),transparent)}
}
/* .story 语法配色 */
.st-tag,.st-key,.st-fn{color:var(--se-accent);font-weight:500}
.st-num,.st-op,.st-dim{color:var(--se-text-2)}
.st-str{color:var(--se-text-1)}
/* ---------- REPRODUCIBLE：交错双栏 ---------- */
.run-row{display:grid;grid-template-columns:1fr;gap:16px;align-items:center;
  padding:40px 0;border-bottom:1px solid var(--se-line)}
.run-row:last-child{border-bottom:0}
.run-text h3{font-size:19px;margin-bottom:8px}
.run-text p{color:var(--se-text-2);font-size:15.5px;max-width:38em}
.run-text .card-tag{display:inline-block;margin-top:12px;font-family:var(--se-mono);font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--se-accent)}
@media (min-width:1024px){
  .run-row{grid-template-columns:5fr 7fr;gap:48px}
  .run-row--flip .run-code{order:2}
}
/* ---------- PROTOCOL：seq 时间轴 + 规格条 ---------- */
.proto-grid{display:grid;gap:48px}
.seq-track{border-left:1px solid var(--se-line);padding-left:8px}
.seq-item{display:grid;grid-template-columns:64px 24px 1fr;align-items:center;gap:8px;padding:10px 0}
.seq-no{font-family:var(--se-mono);font-size:12px;color:var(--se-text-2);letter-spacing:.04em}
.hole{width:10px;height:10px;justify-self:center}
.hole--on{background:var(--se-accent)}
.hole--off{background:transparent;border:1px solid var(--se-accent)}
.seq-msg{font-family:var(--se-mono);font-size:13.5px;color:var(--se-text-1);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.seq-item--resume .seq-msg,.seq-item--resume .seq-no{color:var(--se-accent)}
.seq-gap{display:flex;align-items:center;gap:12px;padding:14px 0 14px 64px;
  font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--se-text-2)}
.seq-gap::before{content:"";width:24px;height:1px;background:var(--se-text-2)}
@media (min-width:1024px){.proto-grid{grid-template-columns:1fr 1fr;gap:64px}}
/* ---------- SAFETY：幽灵编号 + 窄条 ---------- */
.bar-group{margin-bottom:32px}
.bar-group:last-child{margin-bottom:0}
.bar-group h3{font-size:19px;margin-bottom:4px}
.bar-group>p{color:var(--se-text-2);font-size:15.5px;margin-bottom:16px;max-width:38em}
.bar-stack{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.bar{position:relative;display:inline-flex;align-items:center;height:48px;width:fit-content;max-width:100%;
  border:1px solid var(--se-line);background:var(--se-bg-1);padding:0 16px;
  font-family:var(--se-mono);font-size:13px;overflow:hidden;
  transition:border-color var(--se-dur-fast) ease-out}
.bar:hover{border-color:var(--se-accent)}
@media (max-width:639px){
  .bar{height:auto;min-height:48px;padding:12px 16px;white-space:normal}
}
.bar-group--offset{margin-left:0}
@media (min-width:1024px){.bar-group--offset{margin-left:48px}}
/* ---------- QUICKSTART：命令条 ---------- */
.cmd-rows{display:flex;flex-direction:column;gap:12px;max-width:640px}
.cmd-row{display:flex;align-items:center;gap:16px;width:100%;min-height:48px;
  border:1px solid var(--se-line);background:var(--se-bg-1);border-radius:2px;padding:8px 16px;
  font-family:var(--se-mono);font-size:14px;color:var(--se-text-1);text-align:left;
  transition:border-color var(--se-dur-fast) ease-out,background-color var(--se-dur-fast) ease-out}
.cmd-row:hover{border-color:var(--se-accent);background:var(--se-bg-2)}
.cmd-prompt{color:var(--se-accent);flex-shrink:0}
.cmd-text{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:pre}
.cmd-copy{flex-shrink:0;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--se-text-2);border:1px solid var(--se-line);border-radius:2px;padding:6px 10px;
  transition:color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.cmd-row:hover .cmd-copy{color:var(--se-accent);border-color:var(--se-accent)}
.cmd-row.copied .cmd-copy{color:var(--se-accent);border-color:var(--se-accent)}
.qs-flow{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:32px;
  font-family:var(--se-mono);font-size:13px;color:var(--se-text-1)}
.qs-arrow{color:var(--se-line)}
.stat-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px}
/* ---------- PLAY 区 ---------- */
.play-grid{display:grid;gap:20px;grid-template-columns:1fr;align-items:center}
.play-points{list-style:none;font-size:16.5px;color:var(--se-text-1)}
.play-points li{padding:10px 0 10px 24px;position:relative;border-bottom:1px solid var(--se-line)}
.play-points li::before{content:"▪";position:absolute;left:0;color:var(--se-accent)}
.play-note{display:flex;flex-wrap:wrap;gap:10px}
@media (min-width:640px){.play-grid{grid-template-columns:1.4fr 1fr;gap:48px}}
/* ---------- 试玩页 ---------- */
.play-shell{padding:32px 24px 72px}
@media (min-width:640px){.play-shell{padding:48px 24px 72px}}
.play-ui{display:grid;gap:40px;grid-template-columns:1fr;max-width:980px;margin:0 auto}
@media (min-width:1024px){.play-ui{grid-template-columns:1fr 1.1fr;gap:48px}}
.story-chips{display:flex;flex-wrap:wrap;gap:8px}
.story-chip{min-height:40px;padding:8px 14px;border:1px solid var(--se-line);border-radius:2px;
  background:var(--se-bg-1);color:var(--se-text-2);font-family:var(--se-mono);font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;
  transition:border-color var(--se-dur-fast) ease-out,color var(--se-dur-fast) ease-out}
.story-chip:hover{color:var(--se-text-1)}
.story-chip[aria-checked="true"]{color:var(--se-accent);border-color:var(--se-accent)}
.play-log{background:var(--se-code-bg);border:1px solid var(--se-line);border-left:2px solid var(--se-accent);
  border-radius:2px;min-height:320px;max-height:60dvh;overflow-y:auto;padding:16px;
  font-family:var(--se-mono);font-size:14px;line-height:1.7}
.pl-line{display:block;padding:2px 0;white-space:pre-wrap;word-break:break-word;
  animation:plIn 280ms cubic-bezier(.22,.61,.36,1) both}
@keyframes plIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.pl-choices{animation:plIn 280ms cubic-bezier(.22,.61,.36,1) 60ms both}
.pl-choice-btn{animation:plIn 300ms cubic-bezier(.22,.61,.36,1) both}
.pl-end{animation:plIn 320ms cubic-bezier(.22,.61,.36,1) both}
.pl-vars{animation:plIn 300ms cubic-bezier(.22,.61,.36,1) 80ms both}
.pl-speaker{color:var(--se-accent)}
.pl-dim{color:var(--se-text-2)}
.pl-err{color:#C48A6A}
.pl-choices{display:flex;flex-direction:column;gap:8px;padding:10px 0}
.pl-choice-btn{text-align:left;min-height:44px;padding:10px 14px;border:1px solid var(--se-line);
  border-radius:2px;background:var(--se-bg-1);color:var(--se-text-1);font-size:14px;
  transition:border-color var(--se-dur-fast) ease-out,color var(--se-dur-fast) ease-out}
.pl-choice-btn:hover{border-color:var(--se-accent);color:var(--se-accent)}
.pl-choice-btn .pl-no{font-family:var(--se-mono);font-size:11px;color:var(--se-text-2);margin-right:10px}
.pl-end{display:inline-block;margin-top:10px;font-family:var(--se-mono);font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--se-accent);border:1px solid var(--se-accent);
  border-radius:2px;padding:4px 10px}
.pl-vars{margin-top:10px;font-size:13px;color:var(--se-text-2)}
.pl-vars b{color:var(--se-text-1);font-weight:400;font-family:var(--se-mono)}
.play-foot{margin-top:12px;font-size:12.5px;color:var(--se-text-2);line-height:1.6}
/* 分享专属游玩页 */
.share-player{padding:56px 0 72px;min-height:calc(100dvh - 56px);
  opacity:0;transform:translateY(14px);
  transition:opacity 550ms cubic-bezier(.22,.61,.36,1),transform 550ms cubic-bezier(.22,.61,.36,1)}
.share-player.show{opacity:1;transform:none}
.share-player.show .sp-head{animation:seReveal 450ms cubic-bezier(.22,.61,.36,1) both}
.share-player.show .sp-log{animation:seReveal 500ms cubic-bezier(.22,.61,.36,1) 100ms both}
@keyframes seReveal{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.sp-wrap{max-width:760px}
.sp-head{padding:24px 0 28px;border-bottom:1px solid var(--se-line);margin-bottom:32px}
.sp-head .sc-brand{margin-bottom:14px}
.sp-title{font-size:clamp(26px,6vw,38px);margin-bottom:10px;word-break:break-all}
.sp-meta{font-family:var(--se-mono);font-size:13px;color:var(--se-text-2);margin-bottom:20px}
.sp-log{max-height:none;min-height:280px;font-size:15px}
.sp-log .pl-line{padding:6px 0}
@media (max-width:639px){.share-player{padding:32px 0 48px}}
/* 分享封面（/s/<id> 专属界面 + 载入动画） */
.share-cover{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;
  background-color:var(--se-bg-0);
  background-image:
    linear-gradient(var(--se-grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--se-grid) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity 500ms cubic-bezier(.22,.61,.36,1),transform 500ms cubic-bezier(.22,.61,.36,1),
    visibility 0s linear 500ms}
.share-cover.show{opacity:1;visibility:visible;transform:none;
  transition:opacity 500ms cubic-bezier(.22,.61,.36,1),transform 500ms cubic-bezier(.22,.61,.36,1)}
.sc-inner{width:min(480px,88vw);text-align:center;padding:24px}
.sc-brand{font-family:var(--se-mono);font-size:12px;letter-spacing:.24em;color:var(--se-text-2)}
.sc-progress{height:2px;background:var(--se-bg-2);overflow:hidden;margin:28px 0 16px;border-radius:2px;
  opacity:1;transition:opacity 300ms ease-out}
.sc-progress.done{opacity:0}
.sc-bar{display:block;height:100%;width:0;background:var(--se-accent);
  transition:width 900ms cubic-bezier(.22,.61,.36,1)}
.sc-status{font-family:var(--se-mono);font-size:13px;color:var(--se-text-2);min-height:22px;
  letter-spacing:.04em;opacity:1;transition:opacity 220ms ease-out}
.sc-status.sw{opacity:0}
.sc-card{border:1px solid var(--se-line);background:var(--se-bg-1);border-radius:2px;
  padding:36px 28px;margin-top:24px;
  opacity:0;transform:translateY(18px);
  transition:opacity 550ms cubic-bezier(.22,.61,.36,1),transform 550ms cubic-bezier(.22,.61,.36,1)}
.sc-card.show{opacity:1;transform:none}
.sc-label{font-family:var(--se-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--se-accent);margin-bottom:14px}
.sc-label-err{color:#C48A6A}
.sc-title{font-size:26px;margin-bottom:10px;word-break:break-all}
.sc-meta{font-size:13.5px;color:var(--se-text-2);margin-bottom:24px}
.sc-card .btn{min-width:160px}
@media (prefers-reduced-motion:reduce){
  .share-cover,.sc-card,.share-player,.sc-status,.sc-progress{transition:none}
  .sc-bar{width:100%}
  .share-player,.sp-head,.sp-log{opacity:1!important;transform:none!important;animation:none!important}
  .pl-line,.pl-choices,.pl-choice-btn,.pl-end,.pl-vars{animation:none}
}
/* 自定义剧情面板 */
.play-custom{margin-top:24px;border:1px solid var(--se-line);border-radius:2px;background:var(--se-bg-1)}
.play-custom summary{padding:12px 16px;font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2);cursor:pointer;list-style:none;min-height:44px;
  display:flex;align-items:center;transition:color var(--se-dur-fast) ease-out}
.play-custom summary::-webkit-details-marker{display:none}
.play-custom summary::before{content:"▸";margin-right:10px;color:var(--se-accent)}
.play-custom[open] summary::before{content:"▾"}
.play-custom summary:hover{color:var(--se-text-1)}
.play-custom > *:not(summary){margin:0 16px 16px}
.play-name{width:100%;margin-top:16px;min-height:44px;background:var(--se-code-bg);border:1px solid var(--se-line);
  border-radius:2px;padding:10px 14px;color:var(--se-text-1);font-size:14px;font-family:var(--se-font)}
.play-input{width:100%;display:block;background:var(--se-code-bg);border:1px solid var(--se-line);
  border-left:2px solid var(--se-accent);border-radius:2px;padding:12px 14px;color:var(--se-text-1);
  font-family:var(--se-mono);font-size:13.5px;line-height:1.7;resize:vertical;min-height:200px}
.play-name:focus-visible,.play-input:focus-visible{outline:2px solid var(--se-accent);outline-offset:1px}
.play-custom .play-foot a{color:var(--se-accent)}
/* ---------- DOCS 列表 ---------- */
.doc-list{list-style:none}
.doc-link{display:flex;align-items:center;gap:16px;padding:16px 4px;text-decoration:none;
  border-bottom:1px solid var(--se-line);transition:border-color var(--se-dur-fast) ease-out}
.doc-link:first-child{border-top:1px solid var(--se-line)}
.doc-title{font-size:17.5px;font-weight:500}
.doc-desc{color:var(--se-text-2);font-size:14.5px}
.doc-tag{margin-left:auto;flex-shrink:0;font-family:var(--se-mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2);border:1px solid var(--se-line);border-radius:2px;padding:3px 8px}
.doc-arrow{flex-shrink:0;font-family:var(--se-mono);color:var(--se-text-2);
  transition:color var(--se-dur-fast) ease-out,transform var(--se-dur-fast) var(--se-ease-out)}
.doc-link:hover .doc-arrow{color:var(--se-accent);transform:translateX(4px)}
.doc-link:hover .doc-title{color:var(--se-accent)}
/* ---------- 扫光（hover 语言）---------- */
.card-sweep{position:relative;overflow:hidden}
.card-sweep::after{content:"";position:absolute;top:0;left:0;width:50%;height:100%;
  background:linear-gradient(105deg,transparent,rgba(95,164,143,.09),transparent);
  transform:translateX(-140%) skewX(-12deg);pointer-events:none;
  transition:transform var(--se-dur-mid) var(--se-ease-out)}
.card-sweep:hover::after{transform:translateX(320%) skewX(-12deg)}
/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--se-line);position:relative}
.footer::before,.footer::after{content:"";position:absolute;top:0;width:1px;height:6px;background:var(--se-text-2)}
.footer::before{left:0}
.footer::after{right:0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:32px 0;font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.footer-meta{color:var(--se-text-2);display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center}
.footer-meta .dot{color:var(--se-line)}
.footer-meta a{text-decoration:none;color:inherit}
.footer-meta a:hover{color:var(--se-text-1)}
.footer-engrave{color:var(--se-text-2)}
/* ---------- 文档页 ---------- */
.doc-header{padding:36px 0 28px;border-bottom:1px solid var(--se-line)}
.crumbs{font-family:var(--se-mono);font-size:13px;display:flex;flex-wrap:wrap;
  gap:8px;align-items:center;margin-bottom:16px}
.crumbs a{color:var(--se-text-2);text-decoration:none;text-transform:uppercase;letter-spacing:.08em;font-size:12px}
.crumbs a:hover{color:var(--se-text-1)}
.crumbs .sep{color:var(--se-line)}
.crumbs [aria-current="page"]{color:var(--se-text-1);text-transform:uppercase;letter-spacing:.08em;font-size:12px}
.doc-header h1{font-size:clamp(24px,6.5vw,35px)}
.doc-meta{display:flex;flex-direction:column;gap:6px;
  font-family:var(--se-mono);font-size:13px;color:var(--se-text-2);margin-top:14px}
.doc-meta-row{display:flex;flex-wrap:wrap;gap:6px 8px;align-items:center}
.doc-meta .dot{color:var(--se-line)}
.doc-meta a{color:var(--se-text-2);text-decoration:none}
.doc-meta a:hover{color:var(--se-accent)}
.toc-mobile{margin:20px 0 0}
.toc-toggle{width:100%;min-height:48px;display:flex;justify-content:space-between;align-items:center;
  background:var(--se-bg-1);border:1px solid var(--se-line);border-radius:2px;
  padding:12px 16px;font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2)}
.toc-toggle[aria-expanded="true"] .toc-caret{transform:rotate(180deg)}
.toc-caret{transition:transform var(--se-dur-fast) var(--se-ease-out)}
.toc-panel{display:none;background:var(--se-bg-1);border:1px solid var(--se-line);border-top:0;
  border-radius:0 0 2px 2px;padding:8px 16px 12px;max-height:60dvh;overflow-y:auto}
.toc-panel.open{display:block}
.doc-layout{display:grid;gap:48px;padding:32px 24px 64px;grid-template-columns:1fr}
.doc-toc{display:none}
.toc-title{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--se-text-2);margin-bottom:12px}
.toc-list{list-style:none;font-family:var(--se-mono);font-size:13px;line-height:1.5}
.toc-list li{border-left:2px solid transparent;margin:2px 0}
.toc-list a{display:block;padding:8px 0 8px 12px;color:var(--se-text-2);text-decoration:none;
  transition:color var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.toc-list a:hover{color:var(--se-text-1)}
.toc-list li.current{border-left-color:var(--se-accent)}
.toc-list li.current a{color:var(--se-accent);font-weight:500}
@media (min-width:640px){
  .doc-header{padding:48px 0 40px}
  /* 单栏模式：内容列定宽 640px 并整体居中，消除右侧大片留白 */
  .doc-layout{max-width:688px;padding:48px 24px 72px}
  .doc-header .wrap{max-width:688px}
  .doc-pager{max-width:688px;padding:24px 24px 64px}
}
@media (min-width:1024px){
  .doc-header .wrap{max-width:1120px}
  .doc-layout{grid-template-columns:var(--se-toc-width) minmax(0,1fr);padding:48px 24px 96px;
    max-width:1120px;gap:48px}
  .doc-pager{max-width:1120px}
  .prose{max-width:72ch}
  .doc-toc{display:block;position:sticky;top:88px;align-self:start;
    max-height:calc(100vh - 120px);overflow-y:auto}
  .toc-mobile{display:none}
}
.doc-pager{display:grid;gap:16px;grid-template-columns:1fr;padding:24px 24px 64px}
.pager-link{background:var(--se-bg-1);border:1px solid var(--se-line);border-radius:2px;
  padding:20px 24px;text-decoration:none;transition:border-color var(--se-dur-fast) ease-out}
.pager-link:hover{border-color:var(--se-accent)}
.pager-link .pager-label{font-family:var(--se-mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-text-2);display:block;margin-bottom:6px}
.pager-link .pager-title{font-size:16px;font-weight:500;color:var(--se-text-1)}
.pager-next{text-align:right}
/* 文档总览卡片 */
.docs-grid{display:grid;gap:14px;grid-template-columns:1fr}
.doc-card{position:relative;background:var(--se-bg-1);border:1px solid var(--se-line);border-radius:2px;
  padding:18px;text-decoration:none;transition:border-color var(--se-dur-fast) ease-out;display:block}
.doc-card:hover{border-color:var(--se-accent)}
.doc-card .card-no{display:block;font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;
  color:var(--se-text-2);margin-bottom:12px}
.doc-card h2{font-size:19px;margin-bottom:8px}
.doc-card p{color:var(--se-text-2);font-size:15px;margin-bottom:12px}
.doc-card .card-read{font-family:var(--se-mono);font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--se-accent)}
@media (min-width:640px){
  .docs-grid{grid-template-columns:repeat(2,1fr)}
  .doc-card{padding:24px}
}
/* 回到顶部 */
.back-top{position:fixed;right:16px;bottom:16px;z-index:40;width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;background:var(--se-bg-1);
  border:1px solid var(--se-line);border-radius:2px;color:var(--se-text-2);
  font-family:var(--se-mono);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity var(--se-dur-fast) ease-out,visibility var(--se-dur-fast) ease-out,border-color var(--se-dur-fast) ease-out}
.back-top.show{opacity:1;visibility:visible;pointer-events:auto}
.back-top:hover{color:var(--se-accent);border-color:var(--se-accent)}
/* 404 */
.err-plate{padding:72px 0}
.err-code{font-family:var(--se-mono);font-size:12px;letter-spacing:.08em;color:var(--se-accent);margin-bottom:16px}
.err-plate h1{font-size:clamp(30px,8vw,44px);margin-bottom:16px}
.err-plate p{color:var(--se-text-2);max-width:34em;margin-bottom:32px}
/* ---------- 桌面增强 ---------- */
@media (min-width:640px) and (max-width:1023px){
  .grid-2{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1440px){
  .prose{margin-inline:auto}
}
/* ---------- 动效降级 ---------- */
/* ---------- 页面过渡（View Transitions + 无 JS-MPA 兜底）---------- */
@view-transition{navigation:auto}
/* 导航栏单独命名：切换页面时保持稳定，只有内容区过渡 */
header.nav{view-transition-name:site-nav}
::view-transition-old(site-nav){animation:none}
::view-transition-new(site-nav){animation:none}
::view-transition-old(root){animation:vtOut 200ms var(--se-ease-out) both}
::view-transition-new(root){animation:vtIn 320ms var(--se-ease-out) both}
@keyframes vtOut{to{opacity:0;transform:translateY(-8px)}}
@keyframes vtIn{from{opacity:0;transform:translateY(12px)}}
/* 无 View Transitions API 时的 SPA 淡出兜底 */
main#main{transition:opacity var(--se-dur-fast) ease-out}
main#main.page-leaving{opacity:0}
@media (prefers-reduced-motion:reduce){
  .rv{transition:none}
  html.js .rv:not(.in){opacity:1;transform:none}
  .sec-head h2::after{transform:scaleX(1);transition:none}
  .tl .cur{animation:none}
  .card-sweep::after{display:none}
  ::view-transition-old(root),::view-transition-new(root){animation:none}
}

/* ---------- 机制区：sticky 滚动叙事 ---------- */
.story-cols{display:grid;gap:32px;grid-template-columns:1fr}
.story-sticky{align-self:start}
.story-sticky .run-title{font-size:clamp(22px,5vw,30px);line-height:1.25;font-weight:600;margin-bottom:14px}
.story-sticky .run-sub{color:var(--se-text-2);font-size:15.5px;max-width:26em}
.story-items{display:flex;flex-direction:column;gap:56px}
@media (min-width:1024px){
  .story-cols{grid-template-columns:5fr 7fr;gap:64px}
  .story-sticky{position:sticky;top:112px}
  .story-items{gap:0}
}
/* footer */


/* ================================================================
   GEOMETRY — 现代几何极简 reskin（覆盖层）
   大圆角浮层 · 无边框 · 充足留白 · 单一强调色 · 几何构成元素
   ================================================================ */
/* 全局质感 */
body{font-size:16.5px;letter-spacing:-0.01em}
.btn{border-radius:var(--se-radius-sm)}
.btn-primary{box-shadow:0 0 0 0 rgba(107,192,164,.35);transition:box-shadow var(--se-dur-mid) var(--se-ease-out),background-color var(--se-dur-fast) ease-out}
.btn-primary:hover{box-shadow:0 6px 24px -6px rgba(107,192,164,.45)}
.badge{border-radius:999px;border-color:transparent;background:var(--se-bg-2);color:var(--se-text-2)}
.card,.panel,.code,.term,.doc-card,.pager-link,.play-custom,.play-log,.play-input,.play-name,
.story-chip,.pl-choice-btn,.bar,.cmd-row,.highlight,.play-card{border-radius:var(--se-radius)!important;border-left-width:1px!important}
.code,.highlight{border-left-color:var(--se-line)}
.copy-btn,.cmd-copy,.doc-tag,.mh-tag{border-radius:8px!important}
/* 导航 */
.nav{background:color-mix(in srgb,var(--se-bg-0) 72%,transparent);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom-color:transparent}
.nav-link{border-radius:999px;height:34px;display:inline-flex;align-items:center}
.nav-link[aria-current="true"]{background:var(--se-bg-2);border-radius:999px}
.menu-btn,.theme-toggle{border-radius:999px}
/* 分区 */
.sec{padding:120px 0}
.sec + .sec{border-top:0}
.sec-head{margin-bottom:48px}
.sec-no{display:inline-flex;align-items:center;gap:8px}
.sec-no::before{content:"";width:10px;height:10px;background:var(--se-accent);border-radius:3px}
.sec-no{font-family:var(--se-font);font-size:13px;font-weight:600;color:var(--se-text-1);letter-spacing:0}
.sec-head h2{font-size:clamp(28px,4vw,40px);letter-spacing:-0.02em;padding-bottom:0;border-bottom:0}
.sec-head h2::after{display:none}
.sec-lead{font-size:18px;line-height:1.7}
/* HERO */
.hero{padding:140px 0 120px;overflow:hidden;position:relative}
.hero h1{font-size:clamp(46px,7.5vw,84px);letter-spacing:-0.035em;line-height:1.05;margin:28px 0 24px}
.hero-sub{font-size:clamp(17px,2vw,20px);line-height:1.65;max-width:36em;margin-bottom:40px}
.hero-grid{align-items:start}
/* 几何构成艺术（Hero 右上，克制呼吸动画） */
.geo-art{position:absolute;right:-60px;top:-40px;width:560px;height:560px;z-index:0;pointer-events:none}
.geo-art i{position:absolute;display:block;border-radius:50%}
.geo-ring{inset:60px;border:1px solid var(--se-accent);opacity:.5;
  animation:geoSpin 90s linear infinite}
.geo-ring::before{content:"";position:absolute;inset:38px;border:1px solid var(--se-line);
  border-radius:50%;animation:geoSpin 60s linear infinite reverse}
.geo-ring::after{content:"";position:absolute;width:14px;height:14px;border-radius:50%;
  background:var(--se-accent);left:50%;top:-7px;margin-left:-7px}
.geo-square{width:190px;height:190px;border-radius:28px;background:var(--se-bg-2);
  left:210px;top:190px;transform:rotate(12deg);animation:geoFloat 11s ease-in-out infinite}
.geo-dot{width:64px;height:64px;border-radius:18px;background:var(--se-accent);opacity:.9;
  left:120px;top:340px;animation:geoFloat 9s ease-in-out infinite reverse}
.geo-grid-dots{inset:auto 40px 60px auto;width:120px;height:90px;border-radius:0;
  background-image:radial-gradient(var(--se-line) 1.5px,transparent 1.5px);
  background-size:20px 20px;animation:none}
@keyframes geoSpin{to{transform:rotate(360deg)}}
@keyframes geoFloat{0%,100%{translate:0 0}50%{translate:0 -14px}}
/* HERO 内容置顶于几何层 */
.hero .wrap{position:relative;z-index:1}
/* 卡片浮层化 */
.card,.panel,.doc-card,.bar,.play-card{border-radius:var(--se-radius);border-color:rgba(255,255,255,.06)}
.card,.panel,.doc-card{box-shadow:0 1px 0 rgba(255,255,255,.03) inset}
html[data-theme="light"] .card,html[data-theme="light"] .panel,
html[data-theme="light"] .doc-card,html[data-theme="light"] .bar{box-shadow:0 8px 24px -18px rgba(0,0,0,.25)}
/* 代码块：大圆角深浮层 */
.code,.highlight{border-left-width:1px!important}
.term{border-radius:var(--se-radius)}
.term-head{background:color-mix(in srgb,var(--se-bg-1) 60%,transparent)}
/* 分区留白差异 */
#quickstart{padding:96px 0}
#play{padding:120px 0}
/* PLAY 区按钮行距 */
.stat-row{margin-top:32px}
/* 分页/文档卡 */
.pager-link{border-radius:var(--se-radius)}
.doc-card:hover{transform:translateY(-2px);transition:transform var(--se-dur-mid) var(--se-ease-out)}
/* footer 极简 */
.footer{padding:24px 0 40px}
.footer-inner{padding:40px 0 8px}
@media (prefers-reduced-motion:reduce){
  .geo-ring,.geo-ring::before,.geo-square,.geo-dot{animation:none!important}
}
@media (max-width:1023px){
  .geo-art{opacity:.4;right:-120px}
  .hero{padding:96px 0 80px}
}

/* footer 极简品牌行 */
.foot-brand{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--se-text-1);
  padding:36px 0 6px;border-top:1px solid var(--se-line);margin-top:24px}
.foot-brand b{font-weight:600;letter-spacing:-.01em}
.fb-sep{color:var(--se-line)}
.foot-brand a{color:var(--se-text-2);text-decoration:none}
.foot-brand a:hover{color:var(--se-accent)}

/* == 04 PROSE == 长文排版（文档页） */
.prose{font-size:16.5px;line-height:1.75}
@media (min-width:640px){.prose{font-size:17.5px;line-height:1.75}}
.prose h2{font-size:28px;line-height:1.2;font-weight:600;margin:40px 0 16px;
  padding-bottom:12px;border-bottom:1px solid var(--se-line);
  display:flex;align-items:baseline;gap:12px;scroll-margin-top:76px}
@media (min-width:640px){.prose h2{margin-top:64px}}
.prose>h2::before{content:"§" counter(sec-h2);font-family:var(--se-mono);font-size:14px;
  font-weight:400;color:var(--se-accent);letter-spacing:.04em;flex-shrink:0}
.prose{counter-reset:sec-h2}
.prose h2{counter-increment:sec-h2}
.prose h3{font-size:20px;font-weight:600;margin:32px 0 12px;scroll-margin-top:76px}
@media (min-width:640px){.prose h3{font-size:22px}}
.prose h4{font-size:17.5px;font-weight:600;letter-spacing:.02em;margin:28px 0 10px;scroll-margin-top:88px}
.prose p{margin:12px 0}
@media (max-width:639px){
  .prose p{margin:14px 0}
  .prose li{margin:6px 0}
}
.prose ul,.prose ol{margin:12px 0;padding-left:1.5em}
.prose li{margin:4px 0}
.prose li::marker{color:var(--se-accent)}
.prose blockquote{border-left:2px solid var(--se-accent);color:var(--se-text-2);
  padding:4px 0 4px 16px;margin:16px 0}
.prose blockquote p{margin:4px 0}
.prose hr{border:0;border-top:1px solid var(--se-line);margin:48px 0}
.prose strong{font-weight:600}
.prose a{color:var(--se-accent);text-decoration:underline;text-decoration-color:var(--se-line);
  text-underline-offset:3px;transition:text-decoration-color 150ms ease-out}
.prose a:hover{text-decoration-color:var(--se-accent)}
/* 行内 code */
.prose code{font-family:var(--se-mono);font-size:14.5px;background:var(--se-code-bg);
  border:1px solid var(--se-line);border-radius:2px;padding:1px 5px;word-break:break-word}
/* 块级代码（Pygments .highlight） */
.prose .highlight{background:var(--se-code-bg);border:1px solid var(--se-line);
  border-left:2px solid var(--se-accent);border-radius:2px;margin:20px 0;
  overflow-x:auto;position:relative}
.prose .highlight pre{margin:0;padding:16px;background:transparent;overflow:visible}
.prose .highlight code{background:transparent;border:0;padding:0;font-size:13px;
  line-height:1.6;white-space:pre;word-break:normal;min-width:max-content}
@media (min-width:640px){.prose .highlight code{font-size:14px}}
.prose .highlight pre code{display:block}
/* 标题锚链 */
.prose .headerlink{font-family:var(--se-mono);font-size:.6em;color:var(--se-accent);
  text-decoration:none;margin-left:8px;opacity:0;transition:opacity 150ms ease-out;font-weight:400}
.prose h2:hover .headerlink,.prose h3:hover .headerlink,.prose h4:hover .headerlink,
.prose .headerlink:focus-visible{opacity:1}
/* 文档内表格 */
.prose .table-wrap{overflow-x:auto;margin:20px 0;-webkit-overflow-scrolling:touch}
.prose .table-wrap:focus-visible{outline:2px solid var(--se-accent);outline-offset:2px}
.prose table{font-size:14px}
@media (min-width:640px){.prose table{font-size:15px}}
.prose th,.prose td{padding:10px 14px}
/* 表格首列多为消息名/API 名：不折行，交给横向滚动 */
.prose td:first-child code{white-space:nowrap}
.prose code a,.prose a code{color:inherit}
/* 移动端：表格滚动提示（右缘渐隐 + 细铜绿滚动条 + 首列吸附） */
@media (max-width:639px){
  .prose .table-wrap{-webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 20px),transparent);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 20px),transparent)}
  .prose .table-wrap::-webkit-scrollbar{height:3px}
  .prose .table-wrap::-webkit-scrollbar-thumb{background:var(--se-accent);border-radius:2px}
  .prose .table-wrap::-webkit-scrollbar-track{background:var(--se-bg-2)}
  .prose .table-wrap th:first-child,.prose .table-wrap td:first-child{
    position:sticky;left:0;background:var(--se-bg-0);z-index:1}
}

/* == 05 PYGMENTS == 语法高亮 · 金属氧化色环（暗色默认，浅色映射见 tokens） */
.highlight .c,.highlight .c1,.highlight .cm,.highlight .cs,.highlight .ch,
.highlight .cp,.highlight .cpf{color:var(--se-syn-comment);font-style:italic}
.highlight .k,.highlight .kc,.highlight .kd,.highlight .kn,.highlight .kp,
.highlight .kr,.highlight .kv,.highlight .ow{color:var(--se-syn-keyword)}
.highlight .s,.highlight .s1,.highlight .s2,.highlight .sa,.highlight .sb,
.highlight .sc,.highlight .se,.highlight .sh,.highlight .si,.highlight .sx,
.highlight .sr,.highlight .dl{color:var(--se-syn-string)}
.highlight .m,.highlight .mi,.highlight .mf,.highlight .mh,.highlight .mo,
.highlight .il,.highlight .mb{color:var(--se-syn-number)}
.highlight .nf,.highlight .fm,.highlight .nc{color:var(--se-syn-func)}
.highlight .o,.highlight .p,.highlight .op{color:var(--se-syn-punct)}
.highlight .n,.highlight .na,.highlight .nb,.highlight .bp,.highlight .vc,
.highlight .vg,.highlight .vi,.highlight .vm,.highlight .nx{color:var(--se-syn-punct)}
.highlight .nd,.highlight .ni,.highlight .nt,.highlight .ne,.highlight .gp,
.highlight .gs,.highlight .gh,.highlight .gu,.highlight .ge{color:var(--se-syn-meta)}
.highlight .g,.highlight .gt,.highlight .sd,.highlight .ss,.highlight .sx{color:var(--se-syn-meta)}
.highlight .err{color:var(--se-syn-punct);border:0}
.highlight .w{color:var(--se-syn-meta)}