/* 经纬志 · CoordAtlas — 零依赖样式表 v2
   设计系统：语义色 / 字阶 / 间距 / 圆角 / 阴影 / 层级 / 动效
   无障碍：WCAG AA 对比度、focus-visible、skip link、reduced-motion、44px 触控
   全部规则保持零依赖、零外部字体、零图片请求 */
:root{
  color-scheme:light dark;

  /* 品牌与语义色 */
  --brand:#0f766e; --brand-d:#115e59; --brand-l:#ccfbf1; --brand-soft:#f0fdfa;
  --on-brand:#ffffff;
  --ink:#0f172a; --ink-2:#334155; --muted:#5b6b7f; --line:#e2e8f0;
  --bg:#f8fafc; --card:#ffffff; --surface-2:#f1f5f9; --surface-3:#fcfdfe;
  --header-bg:rgba(255,255,255,.94);
  --hero-bg:linear-gradient(135deg,#f0fdfa 0%,#f8fafc 48%,#eff6ff 100%);
  --hero-grid:rgba(15,118,110,.055);
  --hero-kw:#475569; --hero-kw-line:#94a3b8;
  --footer-bg:#0f172a; --on-dark-muted:#a9b8c9; --on-dark-text:#cbd5e1;
  --code-bg:#f1f5f9; --code-ink:#0f766e; --pre-bg:#0f172a; --pre-ink:#e2e8f0;

  /* 状态色 */
  --state-ok:#065f46; --state-ok-bg:#ecfdf5; --state-ok-line:#a7f3d0;
  --state-err:#b91c1c; --state-err-bg:#fef2f2; --state-err-line:#fecaca;
  --state-warn:#92400e; --state-warn-bg:#fffbeb; --state-warn-line:#fde68a;
  --tip-bg:#f0fdfa; --tip-ink:#115e59;

  /* 字阶（收敛为 6 级） */
  --text-xs:12px; --text-sm:13px; --text-base:15.5px;
  --text-md:17px; --text-lg:22px; --text-xl:clamp(26px,3.4vw,38px);
  --font-sans:system-ui,-apple-system,"Segoe UI","Noto Sans CJK SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  /* 间距标尺 */
  --space-1:4px; --space-2:8px; --space-3:12px; --space-4:16px;
  --space-5:22px; --space-6:28px; --space-7:36px; --space-8:48px;

  /* 圆角 / 阴影 / 层级 / 动效 */
  --radius-sm:8px; --radius:14px; --radius-lg:20px; --radius-pill:99px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.04);
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.05);
  --shadow-lg:0 12px 32px rgba(15,23,42,.12);
  --z-header:60; --z-panel:80; --z-toast:200;
  --dur-fast:.16s; --dur-base:.2s;
  --focus-ring:0 0 0 3px rgba(15,118,110,.30);
  --focus-outline:#0f766e;
}

/* 深色模式：只覆盖语义变量，不改任何组件规则 */
@media (prefers-color-scheme:dark){
  :root{
    --brand:#2dd4bf; --brand-d:#5eead4; --brand-l:#1d4b47; --brand-soft:#102b2a;
    --on-brand:#04211e;
    --ink:#e6edf3; --ink-2:#b9c6d3; --muted:#9dacbb; --line:#2a3744;
    --bg:#0d151c; --card:#141f29; --surface-2:#1b2833; --surface-3:#17232e;
    --header-bg:rgba(13,21,28,.94);
    --hero-bg:linear-gradient(135deg,#102b2a 0%,#0d151c 50%,#102033 100%);
    --hero-grid:rgba(94,234,212,.06);
    --hero-kw:#aebdcb; --hero-kw-line:#4a5b6b;
    --footer-bg:#080f15; --on-dark-muted:#a9b8c9; --on-dark-text:#cbd5e1;
    --code-bg:#1b2833; --code-ink:#5eead4; --pre-bg:#080f15; --pre-ink:#e2e8f0;
    --state-ok:#6ee7b7; --state-ok-bg:#0c2a22; --state-ok-line:#1d5c48;
    --state-err:#fca5a5; --state-err-bg:#2b1416; --state-err-line:#7f2b2b;
    --state-warn:#fcd34d; --state-warn-bg:#2a2110; --state-warn-line:#78601f;
    --tip-bg:#102b2a; --tip-ink:#99f6e4;
    --shadow-sm:0 1px 2px rgba(0,0,0,.3);
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.28);
    --shadow-lg:0 12px 32px rgba(0,0,0,.45);
    --focus-ring:0 0 0 3px rgba(45,212,191,.35);
    --focus-outline:#5eead4;
  }
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-sans);font-size:var(--text-base);line-height:1.75;
  -webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-d);text-decoration:underline}
img,svg{max-width:100%}
h1,h2,h3,h4{line-height:1.35;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:var(--text-xl);margin:0 0 14px;font-weight:700;text-wrap:balance}
h2{font-size:var(--text-lg);margin:38px 0 14px;font-weight:700;text-wrap:balance}
h3{font-size:var(--text-md);margin:24px 0 10px;font-weight:650}
p{margin:0 0 14px}
ul,ol{padding-left:22px}
li{margin:6px 0}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-size:.92em;font-variant-numeric:tabular-nums}

/* 全局键盘焦点：所有可交互元素统一可见 */
:focus-visible{outline:2px solid var(--focus-outline);outline-offset:2px;border-radius:4px}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,
select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--focus-outline);outline-offset:2px}
.skip-link{position:absolute;left:12px;top:-60px;z-index:300;background:var(--brand);
  color:var(--on-brand);padding:10px 16px;border-radius:var(--radius-sm);font-weight:650;font-size:14px}
.skip-link:focus{top:8px;color:var(--on-brand);text-decoration:none}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:var(--z-header);background:var(--header-bg);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:26px;height:66px}
.brand{display:flex;align-items:center;gap:10px;color:var(--brand);flex:0 0 auto}
.brand:hover{text-decoration:none;color:var(--brand-d)}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;
  background:var(--brand-soft);color:var(--brand);border:1px solid var(--brand-l)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:18px;letter-spacing:.04em}
.brand-text small{font-size:10px;letter-spacing:.16em;color:var(--muted);font-weight:600}
.main-nav{display:flex;gap:22px;align-items:center;flex:1}
.main-nav a{color:var(--ink-2);font-size:14.5px;font-weight:600;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--brand);text-decoration:none}
.main-nav a.active{position:relative}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-21px;height:2px;background:var(--brand)}
.header-search{position:relative;width:210px;flex:0 0 auto}
.header-search input{width:100%;height:36px;padding:0 12px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--card);font-size:13.5px;outline:none;color:var(--ink);
  font-family:inherit}
.header-search input:focus{border-color:var(--brand);box-shadow:var(--focus-ring)}
.search-panel{position:absolute;top:42px;right:0;width:min(320px,calc(100vw - 32px));max-height:360px;overflow:auto;
  background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;z-index:var(--z-panel)}
.search-panel a{display:block;min-height:40px;padding:8px 10px;border-radius:var(--radius-sm);
  color:var(--ink-2);font-size:13.5px}
.search-panel a:hover,.search-panel a[aria-selected="true"]{background:var(--brand-soft);text-decoration:none;color:var(--brand)}
.search-panel .sp-tag{display:inline-block;min-width:34px;color:var(--muted);font-size:11px}
.search-panel .sp-desc{color:var(--muted);font-size:var(--text-xs)}
.search-panel .sp-empty{padding:14px;color:var(--muted);font-size:13px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius-sm);
  width:38px;height:36px;font-size:18px;color:var(--ink-2);cursor:pointer}

/* ---------- crumb / main ---------- */
.crumb{padding-top:18px;padding-bottom:2px;font-size:var(--text-sm);color:var(--muted)}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.crumb li+li::before{content:"›";margin-right:8px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.main-area{padding-top:22px;padding-bottom:64px;min-height:62vh}
.page-head{max-width:830px;margin-bottom:30px}
.page-head .lead{font-size:var(--text-md);color:var(--ink-2)}
.page-head h1{font-size:clamp(24px,3.1vw,36px)}
.eyebrow{display:inline-block;font-size:var(--text-xs);font-weight:700;letter-spacing:.12em;
  color:var(--brand);background:var(--brand-soft);border:1px solid var(--brand-l);
  padding:3px 10px;border-radius:var(--radius-pill);margin-bottom:14px}
.lead{font-size:var(--text-md);color:var(--ink-2)}

/* ---------- hero（桌面双栏：左主张 / 右快速转换） ---------- */
.hero{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--hero-bg);padding:44px 44px;margin-bottom:40px;
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:32px;align-items:center}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--hero-grid) 1px,transparent 1px),
                   linear-gradient(90deg,var(--hero-grid) 1px,transparent 1px);
  background-size:46px 46px;mask-image:linear-gradient(110deg,transparent 25%,#000 100%)}
.hero::after{content:"";position:absolute;right:-80px;top:-110px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(15,118,110,.10),transparent 68%);pointer-events:none}
.hero-inner{position:relative;z-index:1;max-width:640px}
.hero h1{font-size:clamp(28px,3.5vw,44px);margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--brand);white-space:nowrap}
.hero .lead{font-size:var(--text-md);max-width:600px;margin-bottom:24px}
.hero-actions{display:flex;gap:var(--space-3);flex-wrap:wrap;margin-bottom:20px}
.hero-actions .btn{flex:0 1 auto}
.hero-kw{font-size:var(--text-sm);color:var(--hero-kw)}
.hero-kw a{color:var(--hero-kw);border-bottom:1px dashed var(--hero-kw-line)}
.hero-kw a:hover{color:var(--brand);text-decoration:none}

/* ---------- 快速转换（首屏核心工具） ---------- */
.quick-tool{position:relative;z-index:1;background:var(--card);border:1px solid var(--brand-l);
  border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:20px 22px;scroll-margin-top:88px}
#main{scroll-margin-top:88px}
.quick-tool h2{font-size:17px;margin:0 0 4px;font-weight:700;text-wrap:auto}
.quick-tool .qt-hint{font-size:var(--text-sm);color:var(--muted);margin:0 0 16px}
.qt-fields{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}
.qt-fields label{display:block;font-size:var(--text-sm);font-weight:650;color:var(--ink-2);margin-bottom:6px}
.qt-fields input,.qt-fields select{width:100%;height:44px;padding:8px 11px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--card);color:var(--ink);
  font-family:var(--mono);font-size:15px;font-variant-numeric:tabular-nums;outline:none}
.qt-fields select{font-family:inherit;font-size:14px}
.qt-fields input:focus,.qt-fields select:focus{border-color:var(--brand);box-shadow:var(--focus-ring)}
.qt-full{grid-column:1/-1}
.qt-run{width:100%;margin-top:var(--space-3)}
.qt-result{margin-top:14px;min-height:0}
.qt-result .rrow{padding:6px 0;font-size:13.5px}
.qt-result .rrow strong{font-size:15px;font-weight:700;color:var(--brand-d)}
.qt-more{font-size:var(--text-sm);color:var(--muted);margin:12px 0 0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;
  padding:9px 18px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--card);
  color:var(--ink-2);font-size:14.5px;font-weight:600;cursor:pointer;font-family:inherit;
  transition:background var(--dur-fast) ease,border-color var(--dur-fast) ease,transform var(--dur-fast) ease;
  text-decoration:none}
.btn:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.btn:active{transform:translateY(1px);background:var(--brand-soft)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.btn-primary:hover{background:var(--brand-d);border-color:var(--brand-d);color:var(--on-brand)}
.btn-primary:active{background:var(--brand-d)}
.btn:disabled,.btn[disabled],.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;pointer-events:none}
.btn[aria-busy="true"]{pointer-events:none;opacity:.72}
.btn[aria-busy="true"]::after{content:"";width:13px;height:13px;margin-left:4px;border-radius:50%;
  border:2px solid currentColor;border-right-color:transparent;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.btn-ghost{background:transparent}
.btn-sm{min-height:44px;padding:7px 14px;font-size:13px}

/* ---------- sections ---------- */
.section{margin:46px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:20px;flex-wrap:wrap}
.section-head h2{margin:0;font-size:23px;text-wrap:auto}
.section-head p{margin:4px 0 0;color:var(--muted);font-size:14px}
.more-link{font-size:14px;font-weight:600}

/* ---------- tool cards ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tool-grid.compact{grid-template-columns:repeat(2,1fr)}
.tool-card{display:flex;align-items:flex-start;gap:14px;padding:20px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  color:var(--ink);transition:border-color var(--dur-fast) ease,transform var(--dur-fast) ease,box-shadow var(--dur-fast) ease}
.tool-card:hover,.tool-card:focus-visible{transform:translateY(-2px);border-color:var(--brand);
  box-shadow:var(--shadow);text-decoration:none;color:var(--ink)}
.tool-icon{flex:0 0 auto;display:grid;place-items:center;width:42px;height:42px;border-radius:11px;
  background:var(--brand-soft);color:var(--brand);font-size:21px;font-weight:700;border:1px solid var(--brand-l)}
.tool-card-body{display:flex;flex-direction:column;gap:4px;min-width:0}
.tool-card-body strong{font-size:16.5px}
.tool-card-kw{font-size:12.5px;color:var(--brand);font-weight:600}
.tool-card-desc{font-size:13.5px;color:var(--muted);line-height:1.65;margin-top:4px}
.tool-arrow{margin-left:auto;color:var(--muted);font-size:18px;flex:0 0 auto}

/* ---------- value props ---------- */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.value-card{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.value-card .vnum{font-size:var(--text-xs);font-weight:700;color:var(--brand);letter-spacing:.1em}
.value-card h3{margin:8px 0 8px;font-size:16.5px}
.value-card p{font-size:13.5px;color:var(--muted);margin:0}

/* ---------- data table ---------- */
.table-scroll{position:relative;overflow-x:auto;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--card)}
.table-scroll.can-scroll::after{content:"";position:absolute;right:0;top:0;bottom:0;width:34px;
  pointer-events:none;background:linear-gradient(90deg,transparent,var(--card))}
.table-scroll:focus-visible{outline:2px solid var(--focus-outline);outline-offset:2px}
.data-table{width:100%;border-collapse:collapse;font-size:14px;min-width:640px;
  font-variant-numeric:tabular-nums}
.data-table th,.data-table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--surface-2)}
.data-table thead th{background:var(--surface-2);color:var(--ink-2);font-weight:700;font-size:var(--text-sm);white-space:nowrap}
.data-table tbody tr:last-child td,.data-table tbody tr:last-child th{border-bottom:0}
.data-table tbody tr:hover{background:var(--brand-soft)}
.data-table .hl{background:var(--brand-l);box-shadow:inset 3px 0 0 var(--brand)}
.data-table.kv th{width:170px;color:var(--muted);font-weight:600;background:var(--surface-3)}
.data-table a{font-weight:600}
.table-note,.source-note{font-size:12.5px;color:var(--muted);margin-top:10px}
.source-note{border-top:1px solid var(--line);padding-top:16px;margin-top:34px}
.scroll-hint{display:none;font-size:var(--text-sm);color:var(--muted);margin:8px 0 0}

/* ---------- article / 详情页双栏 ---------- */
.article{max-width:880px;min-width:0}
.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 276px;gap:28px;align-items:start}
.detail-side{position:sticky;top:86px;display:flex;flex-direction:column;gap:14px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.side-card h2{font-size:14px;margin:0 0 10px;font-weight:700;text-wrap:auto}
.side-card .side-coord{font-family:var(--mono);font-size:17px;font-weight:700;color:var(--brand-d);
  font-variant-numeric:tabular-nums;word-break:break-all;display:block;margin-bottom:4px}
.side-card .side-label{font-size:var(--text-xs);color:var(--muted);display:block;margin-bottom:10px}
.side-card a{display:block;padding:6px 0;font-size:13.5px;border-bottom:1px solid var(--surface-2)}
.side-card a:last-child{border-bottom:0}
.side-card .btn{width:100%;margin-top:10px}
.article-head{margin-bottom:26px}
.article .lead{font-size:var(--text-md)}
.hero-data{display:grid;grid-template-columns:repeat(3,1fr) auto;gap:14px;align-items:center;
  padding:20px 22px;background:linear-gradient(120deg,var(--brand-soft),var(--surface-2));
  border:1px solid var(--line);border-radius:var(--radius);margin:22px 0 34px}
.data-big{display:flex;flex-direction:column;gap:2px}
.data-big span{font-size:var(--text-xs);color:var(--muted)}
.data-big strong{font-family:var(--mono);font-size:22px;color:var(--ink);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums}
.data-big strong.small{font-size:14px;line-height:1.5}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-pill);
  padding:4px 12px;font-size:var(--text-sm);color:var(--ink-2)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px}
.chip{display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-pill);font-size:13.5px;color:var(--ink-2)}
.chip:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;background:var(--brand-soft)}
.link-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.link-grid a{display:flex;justify-content:space-between;gap:10px;padding:11px 14px;background:var(--card);
  border:1px solid var(--line);border-radius:9px;font-size:14px;min-height:44px;align-items:center}
.link-grid a:hover{border-color:var(--brand);text-decoration:none}
.link-grid span{font-family:var(--mono);font-size:var(--text-xs);color:var(--muted)}
.prose{max-width:830px;font-size:var(--text-base);color:var(--ink-2)}
.prose h2{color:var(--ink)}
.prose code,.inline-code{background:var(--code-bg);padding:2px 6px;border-radius:5px;
  font-family:var(--mono);font-size:.88em;color:var(--code-ink)}
.prose pre{background:var(--pre-bg);color:var(--pre-ink);padding:18px 20px;border-radius:12px;
  overflow-x:auto;font-size:var(--text-sm);line-height:1.75;margin:16px 0 22px}
.prose pre code{background:none;color:inherit;padding:0;font-size:inherit}
.prose pre code .cm{color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{margin-top:40px}
.faq-list{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list details:last-child{border-bottom:0}
.faq-list summary{padding:15px 18px;cursor:pointer;font-weight:650;font-size:15px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:44px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--brand);font-size:20px;flex:0 0 auto}
.faq-list details[open] summary::after{content:"−"}
.faq-list details[open] summary{color:var(--brand)}
.faq-list details>div{padding:0 18px 16px;color:var(--ink-2);font-size:14.5px;line-height:1.8}

/* ---------- rel box ---------- */
.rel-box{margin-top:38px;padding:20px 22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.rel-box h2{margin:0 0 12px;font-size:var(--text-md);text-wrap:auto}
.rel-links{display:flex;flex-wrap:wrap;gap:10px}
.rel-links a{display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;
  border:1px solid var(--line);border-radius:var(--radius-sm);font-size:13.5px;color:var(--ink-2)}
.rel-links a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;background:var(--brand-soft)}

/* ---------- guide ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.guide-card{display:flex;flex-direction:column;gap:7px;padding:22px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);color:var(--ink)}
.guide-card:hover,.guide-card:focus-visible{border-color:var(--brand);text-decoration:none;color:var(--ink);box-shadow:var(--shadow)}
.guide-cat{font-size:var(--text-xs);font-weight:700;color:var(--brand);letter-spacing:.06em}
.guide-card strong{font-size:var(--text-md)}
.guide-card>span:last-child{font-size:13.5px;color:var(--muted)}

/* ---------- tool UI ---------- */
.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;margin-top:24px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;min-width:0}
.panel h2{margin:0 0 6px;font-size:var(--text-md);text-wrap:auto}
.panel .hint{font-size:var(--text-sm);color:var(--muted);margin-bottom:18px}
.field{margin-bottom:15px}
.field label{display:block;font-size:var(--text-sm);font-weight:650;color:var(--ink-2);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;min-height:44px;padding:10px 12px;
  border:1px solid var(--line);border-radius:9px;font-family:inherit;font-size:15px;
  font-variant-numeric:tabular-nums;color:var(--ink);background:var(--card);outline:none}
.field select{font-variant-numeric:normal}
.field textarea{min-height:150px;resize:vertical;font-family:var(--mono);font-size:14px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:var(--focus-ring)}
.field input:user-invalid{border-color:var(--state-err);box-shadow:0 0 0 3px var(--state-err-bg)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.result-box{background:var(--surface-2);border:1px dashed var(--line);border-radius:10px;
  padding:16px;min-height:120px;transition:background var(--dur-fast) ease,border-color var(--dur-fast) ease}
.result-box[data-state="success"]{background:var(--card);border:1px solid var(--line);
  box-shadow:inset 3px 0 0 var(--brand)}
.result-box[data-state="error"]{background:var(--state-err-bg);border:1px solid var(--state-err-line)}
.result-box[data-state="empty"]{background:var(--surface-2);border:1px dashed var(--line)}
.result-box .rrow{display:flex;justify-content:space-between;gap:12px;padding:8px 0;
  border-bottom:1px solid var(--line);font-size:14px}
.result-box .rrow:last-child{border-bottom:0}
.result-box .rrow span{color:var(--muted);font-size:var(--text-sm)}
.result-box .rrow strong{font-family:var(--mono);font-weight:700;font-size:16px;text-align:right;
  word-break:break-all;font-variant-numeric:tabular-nums}
.result-box .empty{color:var(--muted);font-size:13.5px}
.err{color:var(--state-err);background:var(--state-err-bg);border:1px solid var(--state-err-line);
  padding:9px 12px;border-radius:var(--radius-sm);font-size:var(--text-sm);margin-top:10px}
.ok{color:var(--state-ok);background:var(--state-ok-bg);border:1px solid var(--state-ok-line);
  padding:9px 12px;border-radius:var(--radius-sm);font-size:var(--text-sm);margin-top:10px}
.tool-tip{margin-top:26px;padding:16px 18px;background:var(--tip-bg);border:1px solid var(--brand-l);
  border-radius:10px;font-size:13.5px;color:var(--tip-ink)}
#map-container{width:100%;height:460px;border-radius:10px;border:1px solid var(--line);
  overflow:hidden;background:var(--surface-2)}
.map-fallback{padding:28px;text-align:center;color:var(--muted);font-size:14px}

/* ---------- sitemap ---------- */
.sitemap-links{display:flex;flex-wrap:wrap;gap:8px}
.sitemap-links a{display:inline-flex;align-items:center;min-height:44px;padding:5px 14px;
  background:var(--card);border:1px solid var(--line);border-radius:7px;font-size:13.5px;color:var(--ink-2)}
.sitemap-links a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);color:var(--on-dark-text);margin-top:20px}
.footer-hot{border-bottom:1px solid #1e293b}
.footer-hot-inner{max-width:1160px;margin:0 auto;padding:20px 24px;display:flex;
  flex-wrap:wrap;align-items:center;gap:8px 12px}
.footer-hot strong{font-size:var(--text-sm);color:#e2e8f0;font-weight:650;margin-right:4px}
.footer-hot a{display:inline-flex;align-items:center;min-height:40px;padding:4px 11px;
  border:1px solid #26374a;border-radius:7px;font-size:13px;color:var(--on-dark-muted)}
.footer-hot a:hover{color:#5eead4;border-color:#3c6b67;text-decoration:none}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1fr;gap:36px;padding:48px 24px 34px}
.footer-col{display:flex;flex-direction:column;gap:9px}
.footer-col h3{color:#f8fafc;font-size:14px;margin:0 0 6px}
.footer-col a{color:var(--on-dark-muted);font-size:13.5px;min-height:32px;display:inline-flex;align-items:center}
.footer-col a:hover{color:#5eead4;text-decoration:none}
.footer-brand strong{color:#fff;font-size:20px;letter-spacing:.06em}
.footer-brand p{font-size:13px;color:var(--on-dark-muted);margin:6px 0 0;max-width:340px}
.footer-brand .footer-note{font-size:var(--text-xs);color:var(--on-dark-muted)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:18px 24px;border-top:1px solid #1e293b;font-size:12.5px;color:var(--on-dark-muted)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%,20px);background:var(--pre-bg);
  color:var(--pre-ink);padding:10px 20px;border-radius:9px;font-size:14px;opacity:0;
  pointer-events:none;transition:var(--dur-base);z-index:var(--z-toast)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .main-nav{gap:14px}
  .header-search{width:170px}
  .tool-grid,.value-grid{grid-template-columns:repeat(2,1fr)}
  .hero-data{grid-template-columns:repeat(2,1fr)}
  .tool-layout,.field-row{grid-template-columns:1fr}
  .detail-layout{grid-template-columns:1fr}
  .detail-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 240px}
  .footer-grid{grid-template-columns:repeat(3,1fr);gap:24px}
  .footer-brand{grid-column:1/-1}
  .hero{grid-template-columns:1fr;gap:22px;padding:34px}
}
@media (max-width:760px){
  .wrap{padding:0 16px}
  .header-inner{height:auto;min-height:60px;flex-wrap:wrap;gap:10px;padding-top:10px;padding-bottom:10px}
  .nav-toggle{display:block;margin-left:auto;min-width:44px;height:44px}
  .main-nav{display:none;order:3;flex-basis:100%;flex-direction:column;align-items:stretch;gap:0;
    padding:6px 0;border-top:1px solid var(--line)}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 4px;min-height:44px;display:flex;align-items:center;
    border-bottom:1px solid var(--surface-2)}
  .main-nav a.active::after{display:none}
  .header-search{flex:1;width:auto}
  .header-search input{height:44px;font-size:16px}
  .search-panel{top:50px}
  .hero{padding:24px 18px;border-radius:var(--radius);margin-bottom:24px;gap:16px}
  .hero::before{background-size:36px 36px}
  .hero h1{font-size:27px;margin-bottom:10px}
  .page-head h1,.article-head h1{font-size:25px}
  .hero .lead{font-size:14.5px;line-height:1.7;margin-bottom:14px}
  .hero-actions{flex-wrap:nowrap;gap:8px;margin-bottom:0}
  .hero-actions .btn{flex:1;min-width:0;padding:9px 8px;font-size:13.5px}
  .hero-kw{display:none}
  .quick-tool{padding:16px}
  .qt-fields{gap:10px}
  .qt-fields input,.qt-fields select{font-size:16px;height:44px}
  .field input,.field select,.field textarea{font-size:16px;min-height:44px}
  .field textarea{font-size:14px}
  .tool-grid,.tool-grid.compact,.guide-grid,.value-grid,.tool-layout,.link-grid{grid-template-columns:1fr}
  .hero-data{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:36px 16px}
  .footer-hot-inner{padding:18px 16px}
  .footer-brand{grid-column:1/-1}
  .section{margin:34px 0}
  .field-row{grid-template-columns:1fr}
  .detail-side{flex-direction:column}
  #map-container{height:360px}
  .table-scroll.can-scroll + .scroll-hint{display:block}
  .btn,.btn-sm,.chip,.rel-links a,.sitemap-links a,.faq-list summary{min-height:44px}
}
@media (max-width:420px){
  .footer-grid{grid-template-columns:1fr}
  .hero-data{grid-template-columns:1fr}
  .qt-fields{grid-template-columns:1fr}
  .footer-bottom{font-size:12.5px}
}

/* 动效偏好：彻底关闭平滑滚动与所有过渡/动画 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;scroll-behavior:auto !important}
  .tool-card:hover,.tool-card:focus-visible,.guide-card:hover{transform:none}
  .btn:active{transform:none}
}