/* ==========================================================================
   pim.射频连接器.公司 —— 低互调天馈决策与交付专线
   设计系统：仪器级工业商业风
   - 直角优先（radius 2px），发丝分隔线，等宽数字
   - 深墨蓝 #0B131C 作页头/页脚，正文浅底
   - 主色 深青 #0B7285 / 强调 琥珀 #B26A0B（仅用于关键数值与警示）
   - 禁用：渐变球、玻璃拟态、圆角卡片堆、emoji 图标、渐变文字
   ========================================================================== */

/* ---------------------------------------------------------------- tokens */
:root{
  --ink-900:#080E16;
  --ink-800:#0B131C;
  --ink-700:#101B26;
  --ink-600:#16242F;
  --ink-500:#1E3040;
  --steel-600:#2E4A63;
  --steel-500:#4A5B6D;
  --steel-400:#6B8098;
  --steel-300:#8A9CAD;
  --steel-200:#B9C6D2;

  --line-strong:#C9D3DC;
  --line:#DFE6EC;
  --line-soft:#EDF1F5;

  --paper:#FFFFFF;
  --paper-2:#F6F8FA;
  --paper-3:#EDF1F5;

  --text:#131E29;
  --text-2:#4A5B6D;
  --text-3:#71818F;

  --accent:#0B7285;
  --accent-d:#085A69;
  --accent-l:#E3F0F2;
  --accent-b:#9FC9D0;
  --cyan:#22A2B5;

  --amber:#B26A0B;
  --amber-l:#FBF2E4;
  --danger:#9E2B33;
  --danger-l:#FBECEC;
  --ok:#1D6F45;

  --radius:2px;
  --radius-cap:999px;
  --shadow-1:0 1px 2px rgba(8,14,22,.05);
  --shadow-2:0 2px 4px rgba(8,14,22,.06), 0 12px 28px -14px rgba(8,14,22,.22);
  --shadow-3:0 24px 64px -20px rgba(8,14,22,.45);

  --maxw:1200px;
  --body-w:760px;
  --toc-w:240px;

  --font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
              "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-mono:"SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ---------------------------------------------------------------- reset */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--font-sans);font-size:16px;line-height:1.75;
  font-feature-settings:"tnum" 1,"kern" 1;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
svg{display:block;}
h1,h2,h3,h4,p,li,td,th,figcaption,dd,dt,summary,blockquote{
  overflow-wrap:anywhere;word-break:break-word;
}
a{color:var(--accent);text-decoration:none;}
a:hover{color:var(--accent-d);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;}
[hidden]{display:none !important;}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;background:var(--ink-800);color:#fff;
  padding:10px 16px;border-radius:0 0 var(--radius) 0;
}
.skip-link:focus{left:0;}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
.wrap--404{padding-top:96px;padding-bottom:120px;}

/* ---------------------------------------------------------------- header */
.masthead{
  position:sticky;top:0;z-index:50;background:var(--ink-800);
  border-bottom:1px solid rgba(255,255,255,.10);
}
.masthead__inner{display:flex;align-items:center;gap:24px;min-height:68px;}
.brand{display:flex;align-items:center;gap:12px;color:#fff;flex:0 0 auto;}
.brand:hover{text-decoration:none;color:#fff;}
.brand__mark{flex:0 0 auto;line-height:0;}
.brand__text{display:flex;flex-direction:column;line-height:1.25;}
.brand__name{font-size:16px;font-weight:600;letter-spacing:.02em;}
.brand__sub{
  font-family:var(--font-mono);font-size:10.5px;color:var(--steel-300);
  letter-spacing:.06em;margin-top:1px;
}
.sitenav{margin-left:auto;}
.sitenav__list{display:flex;align-items:center;gap:4px;}
.sitenav__link{
  display:block;padding:8px 14px;color:var(--steel-200);font-size:14.5px;
  border-bottom:2px solid transparent;
}
.sitenav__link:hover{color:#fff;text-decoration:none;}
.sitenav__link.is-active{color:#fff;border-bottom-color:var(--cyan);}
.navtoggle{
  display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.18);
  padding:8px 9px;border-radius:var(--radius);cursor:pointer;
}
.navtoggle__bar{display:block;width:18px;height:1.5px;background:var(--steel-200);}
.navtoggle__bar + .navtoggle__bar{margin-top:4px;}

/* ---------------------------------------------------------------- hero */
.hero{position:relative;background:var(--ink-800);color:#E8EEF4;overflow:hidden;}
.hero__grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(46,74,99,.20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,74,99,.20) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.25) 70%, transparent);
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.25) 70%, transparent);
}
.hero__inner{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;align-items:center;padding:72px 28px 76px;
}
.hero__kicker{
  margin:0 0 16px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan);
}
.hero__h{
  margin:0 0 18px;font-size:42px;line-height:1.18;font-weight:600;letter-spacing:-.01em;color:#fff;
}
.hero__lede{margin:0 0 30px;font-size:16.5px;line-height:1.85;color:var(--steel-200);max-width:36em;}
.hero__acts{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:40px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 22px;border-radius:var(--radius);font-size:14.5px;font-weight:500;
  border:1px solid transparent;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease;
}
.btn--solid{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn--solid:hover{background:var(--accent-d);border-color:var(--accent-d);color:#fff;text-decoration:none;}
.btn--ghost{background:transparent;color:#DCE6EE;border-color:rgba(255,255,255,.24);}
.btn--ghost:hover{background:rgba(255,255,255,.07);color:#fff;border-color:rgba(255,255,255,.42);text-decoration:none;}
.hero__facts{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  margin:0;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);
}
.hero__fact{background:var(--ink-800);padding:14px 16px;}
.hero__fact dt{
  font-size:11.5px;color:var(--steel-400);letter-spacing:.06em;margin-bottom:4px;
}
.hero__fact dd{margin:0;font-size:15px;color:#fff;}
.hero__fact .num{color:var(--cyan);}
.hero__fig{margin:0;}
.im3fig{width:100%;height:auto;border:1px solid rgba(255,255,255,.10);}
.hero__figcap{
  margin:0;padding:10px 2px 0;font-size:12.5px;color:var(--steel-400);line-height:1.6;
}

/* ---------------------------------------------------------------- bands */
.band{padding:80px 0;border-bottom:1px solid var(--line);}
.band--alt{background:var(--paper-2);}
.sec__head{margin-bottom:40px;max-width:780px;}
.sec__kicker{
  margin:0 0 12px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent);
}
.sec__h{margin:0 0 12px;font-size:28px;line-height:1.35;font-weight:600;letter-spacing:-.005em;}
.sec__sub{margin:0;font-size:15px;color:var(--text-2);line-height:1.8;}
.band__more{margin:32px 0 0;}
.morelink{font-size:14.5px;font-weight:500;}
.note{
  margin:28px 0 0;padding:16px 20px;background:var(--paper-3);
  border-left:3px solid var(--steel-500);font-size:13.5px;line-height:1.85;color:var(--text-2);
}

/* ---------------------------------------------------------------- scope */
.scope{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border:1px solid var(--line);}
.scope__col{padding:28px 30px;}
.scope__col + .scope__col{border-left:1px solid var(--line);}
.scope__t{
  margin:0 0 18px;font-size:13px;letter-spacing:.1em;font-weight:600;
  display:inline-block;padding:3px 10px;border-radius:var(--radius);
}
.scope__col--yes .scope__t{background:var(--accent-l);color:var(--accent-d);}
.scope__col--no .scope__t{background:var(--danger-l);color:var(--danger);}
.scope__list li{
  position:relative;padding-left:20px;margin-bottom:12px;font-size:14.5px;
  line-height:1.8;color:var(--text-2);
}
.scope__list li:last-child{margin-bottom:0;}
.scope__list li::before{position:absolute;left:0;top:0;font-family:var(--font-mono);}
.scope__col--yes .scope__list li::before{content:"＋";color:var(--accent);}
.scope__col--no .scope__list li::before{content:"－";color:var(--danger);}

/* ---------------------------------------------------------------- product lines */
.linegrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);}
.linecard{background:var(--paper);padding:26px 26px 24px;}
.linecard__n{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;color:var(--steel-300);letter-spacing:.1em;}
.linecard__t{margin:0 0 10px;font-size:17px;line-height:1.5;font-weight:600;}
.linecard__a{color:var(--text);}
.linecard__a:hover{color:var(--accent);text-decoration:none;}
.linecard__d{margin:0 0 16px;font-size:14px;line-height:1.8;color:var(--text-2);}
.linecard__m{margin:0;font-family:var(--font-mono);font-size:12.5px;color:var(--text-3);}

/* ---------------------------------------------------------------- decision tree */
.dtree{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.dtree__i{border:1px solid var(--line);border-left:3px solid var(--accent);padding:20px 22px;background:var(--paper);}
.dtree__q{margin:0 0 12px;font-size:15px;line-height:1.7;font-weight:500;}
.dtree__id{
  display:inline-block;font-family:var(--font-mono);font-size:11px;color:var(--accent-d);
  background:var(--accent-l);padding:1px 6px;margin-right:10px;border-radius:var(--radius);
  vertical-align:1px;
}
.dtree__a{display:flex;flex-wrap:wrap;gap:8px;margin:0;font-size:13.5px;}
.dtree__yes,.dtree__no{padding:3px 10px;border-radius:var(--radius);font-family:var(--font-mono);font-size:12.5px;}
.dtree__yes{background:var(--accent-l);color:var(--accent-d);}
.dtree__no{background:var(--paper-3);color:var(--text-2);}

/* ---------------------------------------------------------------- tables */
.tablewrap{overflow-x:auto;border:1px solid var(--line);background:var(--paper);}
table.spec{
  width:100%;border-collapse:collapse;font-size:13.5px;line-height:1.7;min-width:640px;
}
table.spec caption{
  caption-side:top;text-align:left;padding:14px 18px;font-size:12.5px;color:var(--text-3);
  border-bottom:1px solid var(--line);background:var(--paper-2);letter-spacing:.02em;
}
table.spec th,table.spec td{
  padding:11px 18px;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top;
}
table.spec thead th{
  background:var(--ink-700);color:#DCE6EE;font-weight:500;font-size:12.5px;
  letter-spacing:.04em;white-space:nowrap;border-bottom:none;
}
table.spec tbody th{
  background:var(--paper-2);font-weight:600;color:var(--text);white-space:nowrap;
}
table.spec tbody tr:last-child th,table.spec tbody tr:last-child td{border-bottom:none;}
table.spec tbody tr:hover td{background:#FAFCFD;}
table.spec td:nth-child(2){font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------------------------------------------------------------- packages */
.pkggrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);}
.pkg{background:var(--paper-2);padding:26px 26px 24px;}
.pkg__n{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--accent);margin:0 0 12px;}
.pkg__t{margin:0 0 10px;font-size:16.5px;font-weight:600;line-height:1.5;}
.pkg__d{margin:0 0 16px;font-size:13.5px;line-height:1.8;color:var(--text-2);}
.pkg__fields li{
  position:relative;padding-left:16px;margin-bottom:7px;font-size:13px;line-height:1.7;color:var(--text-3);
}
.pkg__fields li::before{content:"·";position:absolute;left:2px;color:var(--steel-400);font-weight:700;}

/* ---------------------------------------------------------------- entry list */
.entry-list{border-top:1px solid var(--line);}
.entry{padding:26px 0 24px;border-bottom:1px solid var(--line);}
.entry__t{margin:0 0 8px;font-size:18px;line-height:1.55;font-weight:600;}
.entry__a{color:var(--text);}
.entry__a:hover{color:var(--accent);text-decoration:none;}
.entry__s{margin:0 0 10px;font-size:14.5px;line-height:1.8;color:var(--text-2);max-width:62em;}
.entry__m{margin:0;display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px;color:var(--text-3);}
.entry__cat{
  font-family:var(--font-mono);color:var(--accent-d);background:var(--accent-l);
  padding:2px 9px;border-radius:var(--radius);letter-spacing:.02em;
}
.entry__spec{font-family:var(--font-mono);}
.entry-list--home{border-top:none;}

/* ---------------------------------------------------------------- collection layout */
.listhead{padding:56px 0 34px;border-bottom:1px solid var(--line);}
.listhead__kicker{
  margin:0 0 12px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--accent);
}
.listhead__title{margin:0 0 14px;font-size:32px;line-height:1.3;font-weight:600;letter-spacing:-.01em;}
.listhead__lede{margin:0;font-size:15px;color:var(--text-2);line-height:1.85;max-width:64em;}
.listhead__intro{font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:64em;}
.listhead__intro p{margin:0 0 12px;}

.catlayout{display:grid;grid-template-columns:236px minmax(0,1fr);gap:48px;padding:44px 0 8px;}
.cat-side__h{
  margin:0 0 14px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-3);
}
.category-list{border-top:1px solid var(--line);}
.category-list__i{border-bottom:1px solid var(--line-soft);}
.category-list__a{
  display:block;padding:10px 12px;font-size:14px;color:var(--text-2);border-left:2px solid transparent;
}
.category-list__a:hover{background:var(--paper-2);color:var(--text);text-decoration:none;}
.category-list__a.is-active{
  color:var(--accent-d);border-left-color:var(--accent);background:var(--accent-l);font-weight:600;
}
.cat-content{min-width:0;}
.cat-content__empty{color:var(--text-3);font-size:14.5px;padding:32px 0;}
.catfaq{margin-top:64px;padding-top:44px;border-top:1px solid var(--line);}

/* ---------------------------------------------------------------- pager */
.pager{display:flex;align-items:center;gap:16px;padding:32px 0 8px;}
.pager__a{
  padding:9px 18px;border:1px solid var(--line-strong);border-radius:var(--radius);
  font-size:14px;color:var(--text-2);
}
.pager__a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none;}
.pager__a.is-disabled{color:var(--steel-300);border-color:var(--line-soft);}
.pager__pos{font-family:var(--font-mono);font-size:13px;color:var(--text-3);}

/* ---------------------------------------------------------------- breadcrumb */
.crumbs{background:var(--paper-2);border-bottom:1px solid var(--line);}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:12px 0;font-size:13px;}
.crumbs__item + .crumbs__item::before{content:"›";color:var(--steel-300);margin-right:8px;}
.crumbs__a{color:var(--text-3);}
.crumbs__a:hover{color:var(--accent);}
.crumbs__cur{color:var(--text);}

/* ---------------------------------------------------------------- doc head */
.dochead{padding:44px 0 34px;border-bottom:1px solid var(--line);}
.dochead__kicker{
  margin:0 0 14px;display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--text-3);
}
.dochead__cat{
  font-family:var(--font-mono);color:var(--accent-d);background:var(--accent-l);
  padding:2px 10px;border-radius:var(--radius);letter-spacing:.02em;
}
.dochead__cat:hover{text-decoration:none;background:var(--accent-b);}
.dochead__sep{color:var(--steel-200);}
.dochead__kind{letter-spacing:.06em;}
.dochead__title{margin:0 0 20px;font-size:34px;line-height:1.32;font-weight:600;letter-spacing:-.012em;max-width:24em;}
.dochead__lede{
  margin:0 0 22px;font-size:16px;line-height:1.9;color:var(--text-2);max-width:44em;
  padding-left:18px;border-left:3px solid var(--accent-b);
}
.kws{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;}
.kws__i{
  font-family:var(--font-mono);font-size:12px;color:var(--text-2);background:var(--paper-3);
  padding:3px 10px;border-radius:var(--radius);letter-spacing:.02em;
}
.dochead__meta{margin:0;font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.dochead__meta time{font-family:var(--font-mono);color:var(--text-2);}
.tag-text{
  font-family:var(--font-mono);font-size:11.5px;color:var(--text-3);
  border:1px solid var(--line);padding:1px 7px;border-radius:var(--radius);margin-right:6px;
}

/* product fact bar */
.factbar{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);margin:0;
}
.factbar__i{background:var(--paper);padding:12px 16px;display:flex;flex-direction:column;gap:3px;}
.factbar__k{font-size:11.5px;color:var(--text-3);letter-spacing:.04em;}
.factbar__v{font-family:var(--font-mono);font-size:13.5px;color:var(--text);font-variant-numeric:tabular-nums;}

/* ---------------------------------------------------------------- doc layout */
.layout{
  display:grid;grid-template-columns:minmax(0,var(--body-w)) var(--toc-w);
  gap:56px;justify-content:center;padding:48px 0 88px;align-items:start;
}
.docbody{min-width:0;font-size:16px;line-height:1.95;color:var(--text);}

.docbody h2{
  margin:52px 0 18px;padding-top:22px;border-top:1px solid var(--line);
  font-size:23px;line-height:1.45;font-weight:600;letter-spacing:-.005em;
}
.docbody h2:first-child{margin-top:0;padding-top:0;border-top:none;}
.docbody h3{margin:34px 0 14px;font-size:18px;line-height:1.5;font-weight:600;}
.docbody h4{margin:26px 0 10px;font-size:16px;font-weight:600;color:var(--text-2);}
.docbody p{margin:0 0 18px;}
.docbody ul,.docbody ol{margin:0 0 20px;padding-left:0;}
.docbody ol{counter-reset:ol;}
.docbody li{position:relative;padding-left:24px;margin-bottom:10px;}
.docbody ul > li::before{
  content:"";position:absolute;left:6px;top:.72em;width:5px;height:1.5px;background:var(--accent);
}
.docbody ol > li{counter-increment:ol;}
.docbody ol > li::before{
  content:counter(ol)".";position:absolute;left:0;top:0;font-family:var(--font-mono);
  font-size:13px;color:var(--accent);line-height:2.4;
}
.docbody strong{font-weight:600;color:var(--text);}
.docbody code{
  font-family:var(--font-mono);font-size:13.5px;background:var(--paper-3);
  padding:1px 6px;border-radius:var(--radius);
}
.docbody blockquote{
  margin:26px 0;padding:20px 24px;background:var(--paper-2);
  border-left:3px solid var(--accent);font-size:15px;color:var(--text-2);
}
.docbody blockquote p{margin:0 0 10px;}
.docbody blockquote p:last-child{margin-bottom:0;}
.docbody blockquote ol,.docbody blockquote ul{margin-bottom:0;}
.docbody blockquote strong{color:var(--text);}
.docbody hr{margin:40px 0;border:none;border-top:1px solid var(--line);}
.docbody > p:first-of-type{font-size:16.5px;}

.docbody .tablewrap{margin:0 0 24px;}
.docbody table.spec{min-width:520px;font-size:13.5px;}
.docbody table.spec th,.docbody table.spec td{padding:10px 14px;}
.docbody .admonition{
  margin:28px 0;padding:20px 24px;background:var(--amber-l);
  border-left:3px solid var(--amber);font-size:14.5px;color:var(--text-2);
}
.docbody .admonition p{margin:0 0 10px;}
.docbody .admonition p:last-child{margin-bottom:0;}
.docbody .admonition-title{
  font-weight:600;color:var(--amber);font-size:13px;letter-spacing:.04em;margin-bottom:8px;
}
.docbody dl{margin:0 0 22px;}
.docbody dt{font-weight:600;margin-top:14px;}
.docbody dd{margin:2px 0 0;color:var(--text-2);}

/* ---------------------------------------------------------------- FAQ */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary,.docbody details summary{
  position:relative;padding:18px 44px 18px 0;cursor:pointer;font-size:15.5px;
  font-weight:500;line-height:1.7;color:var(--text);list-style:none;
}
.faq summary::-webkit-details-marker,.docbody details summary::-webkit-details-marker{display:none;}
.faq summary::after,.docbody details summary::after{
  content:"＋";position:absolute;right:6px;top:16px;font-family:var(--font-mono);
  font-size:16px;color:var(--accent);transition:transform .18s ease;
}
.faq details[open] summary::after,.docbody details[open] summary::after{content:"－";}
.faq details[open] summary,.docbody details[open] summary{color:var(--accent-d);}
.faq details p,.docbody details p{
  margin:0 0 20px;padding-right:36px;font-size:14.5px;line-height:1.9;color:var(--text-2);
}
.docbody details{margin-bottom:0;}
.docbody .faq-fallback{margin-top:8px;}

/* ---------------------------------------------------------------- TOC */
.toc-aside{position:sticky;top:88px;max-height:calc(100vh - 120px);overflow-y:auto;}
.toc__head{
  margin:0 0 14px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-3);
}
.toc__list{border-left:1px solid var(--line);}
.toc__item{line-height:1.6;}
.toc__link{
  display:block;padding:6px 0 6px 14px;margin-left:-1px;font-size:13.5px;color:var(--text-2);
  border-left:1px solid transparent;
}
.toc__link:hover{color:var(--accent);border-left-color:var(--accent-b);text-decoration:none;}
.toc__sublist .toc__link{padding-left:26px;font-size:13px;color:var(--text-3);}
.toc__link.is-current{color:var(--accent-d);border-left-color:var(--accent);font-weight:600;}

/* ---------------------------------------------------------------- footer */
.sitefoot{background:var(--ink-800);color:var(--steel-300);border-top:1px solid rgba(255,255,255,.10);}
.sitefoot__grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:40px;padding:56px 28px 40px;
}
.sitefoot__name{margin:0 0 12px;font-size:15.5px;font-weight:600;color:#fff;line-height:1.6;}
.sitefoot__desc{margin:0 0 12px;font-size:13.5px;line-height:1.85;max-width:32em;}
.sitefoot__meta{margin:0;font-size:13px;color:var(--steel-400);}
.sitefoot__h{
  margin:0 0 14px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--steel-400);
}
.sitefoot__list li{margin-bottom:9px;font-size:13.5px;}
.sitefoot__list a{color:var(--steel-200);}
.sitefoot__list a:hover{color:#fff;text-decoration:none;}
.sitefoot__person{margin:14px 0 0;font-size:13px;color:var(--steel-400);}
.linkbtn{
  background:none;border:none;padding:0;color:var(--steel-200);font-size:13.5px;
  cursor:pointer;text-align:left;
}
.linkbtn:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.sitefoot__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 28px 34px;border-top:1px solid rgba(255,255,255,.08);
}
.beian{display:flex;flex-wrap:wrap;align-items:center;gap:22px;}
.beian__item{display:flex;align-items:center;}
.beian__link{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--steel-300);
}
.beian__link:hover{color:#fff;text-decoration:none;}
.beian__icon{width:auto;height:18px;flex:0 0 auto;image-rendering:auto;}
.sitefoot__copy{margin:0;font-size:12.5px;color:var(--steel-500);}

/* ---------------------------------------------------------------- dock (右侧竖向悬浮坞) */
.dock{
  position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:70;
  display:flex;flex-direction:column;align-items:flex-end;gap:10px;pointer-events:none;
}
.cap{
  pointer-events:auto;display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px 11px 16px;border-radius:var(--radius-cap);
  background:var(--ink-700);color:#E4EDF4;border:1px solid rgba(255,255,255,.16);
  font-size:14px;line-height:1;cursor:pointer;white-space:nowrap;
  box-shadow:0 10px 30px -12px rgba(8,14,22,.6);
  transition:background-color .18s ease,transform .18s ease,border-color .18s ease;
}
.cap:hover{background:var(--ink-600);border-color:rgba(255,255,255,.34);}
.cap:active{transform:translateY(1px);}
.cap__icon{display:inline-flex;line-height:0;}
.cap--wechat{background:var(--accent-d);border-color:rgba(255,255,255,.22);color:#fff;}
.cap--wechat:hover{background:var(--accent);border-color:rgba(255,255,255,.44);}
.cap--wechat .cap__icon{color:#9FE3EE;}
.cap--top .cap__icon{color:var(--cyan);}

/* ---------------------------------------------------------------- wechat modal */
.wxmodal{position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;padding:24px;}
.wxmodal__scrim{position:absolute;inset:0;background:rgba(6,10,16,.78);}
.wxmodal__panel{
  position:relative;background:var(--paper);border-radius:var(--radius);
  box-shadow:var(--shadow-3);max-width:720px;width:100%;max-height:calc(100vh - 48px);
  display:flex;flex-direction:column;overflow:hidden;
}
.wxmodal__head{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:18px 22px;border-bottom:1px solid var(--line);
}
.wxmodal__kicker{
  margin:0 0 4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);
}
.wxmodal__title{margin:0;font-size:16px;font-weight:600;line-height:1.5;}
.wxmodal__close{
  background:none;border:1px solid var(--line-strong);border-radius:var(--radius);
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;color:var(--text-2);flex:0 0 auto;padding:0;
}
.wxmodal__close:hover{border-color:var(--accent);color:var(--accent);}
.wxmodal__body{
  padding:22px;overflow:auto;background:var(--paper-2);display:flex;justify-content:center;
}
.wxmodal__card{
  width:638px;height:1016px;max-width:min(638px, 100%);
  max-height:calc(100vh - 240px);object-fit:contain;object-position:top center;
  border:1px solid var(--line);background:#fff;
}
.wxmodal__foot{
  margin:0;padding:12px 22px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);line-height:1.7;
}

/* ---------------------------------------------------------------- 404 */
.nf__code{
  margin:0 0 12px;font-family:var(--font-mono);font-size:56px;line-height:1;
  color:var(--steel-200);letter-spacing:-.02em;
}
.nf__h{margin:0 0 16px;font-size:28px;font-weight:600;line-height:1.4;}
.nf__p{margin:0 0 28px;font-size:15px;color:var(--text-2);line-height:1.9;max-width:44em;}
.nf__list li{margin-bottom:12px;font-size:15px;padding-left:0;}

/* ---------------------------------------------------------------- responsive */
@media (max-width:1024px){
  .hero__inner{grid-template-columns:minmax(0,1fr);gap:44px;padding:56px 28px 60px;}
  .hero__h{font-size:34px;}
  .hero__facts{grid-template-columns:repeat(2,minmax(0,1fr));}
  .layout{grid-template-columns:minmax(0,1fr);gap:0;padding:40px 0 72px;}
  .toc-aside{position:static;max-height:none;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);}
  .catlayout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .category-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);}
  .linegrid,.pkggrid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dtree{grid-template-columns:minmax(0,1fr);}
  .sitefoot__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .sec__h{font-size:25px;}
  .listhead__title{font-size:28px;}
  .dochead__title{font-size:30px;}
  .dock{
    left:50%;right:auto;top:auto;bottom:20px;transform:translateX(-50%);
    flex-direction:row;align-items:center;gap:10px;width:auto;
  }
}

@media (max-width:820px){
  .navtoggle{display:block;}
  .sitenav{
    position:absolute;left:0;right:0;top:100%;background:var(--ink-700);
    border-bottom:1px solid rgba(255,255,255,.12);
    display:none;padding:8px 0;
  }
  .masthead__inner{position:relative;}
  .sitenav.is-open{display:block;}
  .sitenav__list{flex-direction:column;align-items:stretch;gap:0;padding:0 16px;}
  .sitenav__link{padding:13px 6px;border-bottom:1px solid rgba(255,255,255,.08);}
  .sitenav__link.is-active{border-bottom-color:rgba(255,255,255,.08);background:rgba(34,162,181,.14);}
  .scope{grid-template-columns:minmax(0,1fr);}
  .scope__col + .scope__col{border-left:none;border-top:1px solid var(--line);}
}

@media (max-width:640px){
  body{font-size:15.5px;}
  .wrap{padding:0 18px;}
  .hero__inner{padding:44px 18px 48px;}
  .hero__h{font-size:26px;}
  .hero__lede{font-size:15.5px;}
  .hero__facts{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero__acts{gap:10px;}
  .btn{padding:11px 18px;font-size:14px;}
  .band{padding:56px 0;}
  .sec__h{font-size:22px;}
  .linegrid,.pkggrid,.dtree{grid-template-columns:minmax(0,1fr);}
  .category-list{grid-template-columns:minmax(0,1fr);}
  .sitefoot__grid{grid-template-columns:minmax(0,1fr);gap:28px;padding:44px 18px 32px;}
  .sitefoot__legal{padding:18px 18px 28px;flex-direction:column;align-items:flex-start;}
  .beian{flex-direction:column;align-items:flex-start;gap:12px;}
  .listhead{padding:40px 0 26px;}
  .listhead__title{font-size:24px;}
  .dochead{padding:32px 0 26px;}
  .dochead__title{font-size:22px;}
  .dochead__lede{font-size:15px;padding-left:14px;}
  .docbody h2{font-size:19.5px;margin-top:40px;}
  .docbody h3{font-size:16.5px;}
  .docbody table.spec{min-width:480px;font-size:13px;}
  .toc-aside{display:none;}
  .dock{
    left:50%;right:auto;top:auto;bottom:14px;transform:translateX(-50%);
    flex-direction:row;align-items:center;gap:8px;width:calc(100% - 24px);justify-content:center;
  }
  .cap{padding:10px 16px;font-size:13px;}
  .cap__label{white-space:nowrap;}
  .wxmodal{padding:12px;}
  .wxmodal__panel{max-height:calc(100vh - 24px);}
  .wxmodal__body{padding:14px;}
  .wxmodal__card{max-height:calc(100vh - 210px);}
  .wf__code{font-size:44px;}
  .nf__code{font-size:44px;}
  .nf__h{font-size:22px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
}

@media print{
  .masthead,.dock,.wxmodal,.sitefoot,.crumbs,.toc-aside{display:none !important;}
}