/* FeeRevo — 账本 / 红笔对账单 (Ledger & Red-pen) · 全站唯一样式表 · 2026-08-23 */

/* ============ 1. tokens ============ */
:root{
  --paper:#F3F6F1;
  --paper-2:#E9EEE6;
  --card:#FFFFFF;
  --ink:#14202B;
  --ink-2:#3A4955;
  --muted:#5C6A75;   /* 4.5:1+ on --paper / --paper-2 / --card(08-23 对比度修) */
  --ledger:#1F5F45;
  --ledger-2:#2E8B63;
  --ledger-bg:#E3F0E8;
  --redpen:#C2281F;
  --redpen-bg:#FBE9E7;
  --stamp:#8A5A2B;
  --rule:rgba(20,32,43,.10);
  --rule-2:rgba(20,32,43,.20);
  --margin-rule:rgba(194,40,31,.55);
  --deep:#10202A;
  --deep-2:#17303D;
  --deep-num:#DDF3E7;
  --sans:"Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --disp:"Bricolage Grotesque","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --mono:"DM Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --wrap:1180px;
  --r:3px;
  --line:2rem;
  --shadow-card:0 1px 0 rgba(20,32,43,.08),0 10px 26px -18px rgba(20,32,43,.55);
  --shadow-lift:0 2px 0 rgba(20,32,43,.10),0 18px 34px -20px rgba(20,32,43,.55);
}

/* ============ 2. base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.78;
  font-weight:400;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration-color:var(--margin-rule);text-underline-offset:3px}
a:hover{color:var(--redpen)}
h1,h2,h3,h4{font-family:var(--disp);font-weight:800;line-height:1.22;letter-spacing:-.012em;margin:0 0 .5em}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:1.25em}
li{margin:.32em 0}
table{border-collapse:collapse;width:100%}
button,input,select{font:inherit;color:inherit}
hr{border:0;border-top:1px solid var(--rule);margin:2rem 0}
.mono{font-family:var(--mono)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.muted{color:var(--muted)}
.small{font-size:13px;line-height:1.65}
.tiny{font-size:12px;line-height:1.6;color:var(--muted)}
.nowrap{white-space:nowrap}
.hide{display:none !important}
.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;inset-inline-start:-9999px;top:0;z-index:99;background:var(--ink);color:#fff;padding:.5rem .9rem}
.skip-link:focus{inset-inline-start:0}
:focus-visible{outline:2px solid var(--redpen);outline-offset:2px}
.wrap{width:min(var(--wrap),calc(100% - 2.5rem));margin-inline:auto}
.wrap-narrow{width:min(760px,calc(100% - 2.5rem));margin-inline:auto}

/* 账页纸纹:极淡横线 */
.ruled{
  background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--line) - 1px),var(--rule) calc(var(--line) - 1px),var(--rule) var(--line));
  background-position:0 .35rem;
}

/* ============ 3. 红笔 / 铜章 / 编号 签名元素 ============ */
mark.redpen,.redpen{
  background:transparent;color:inherit;padding:0 .06em;
  background-image:linear-gradient(to top,rgba(194,40,31,.85) 0,rgba(194,40,31,.85) 2px,transparent 2px);
  background-repeat:no-repeat;background-size:100% .42em;background-position:0 88%;
  text-decoration:none;
}
mark.redpen.wave{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='6' viewBox='0 0 40 6'><path d='M0 4 C 6 1, 12 1, 20 4 S 34 7, 40 3' fill='none' stroke='%23C2281F' stroke-width='1.6' stroke-linecap='round'/></svg>");
  background-size:40px 6px;background-repeat:repeat-x;background-position:0 100%;padding-bottom:.14em;
}
.strike{position:relative;color:var(--muted);text-decoration:none}
.strike::after{content:"";position:absolute;left:-2%;right:-2%;top:52%;height:2px;background:var(--redpen);transform:rotate(-2.4deg);border-radius:2px}
.stamp{
  display:inline-flex;align-items:center;gap:.3em;
  font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--stamp);border:1.5px solid rgba(138,90,43,.75);border-radius:2px;
  padding:.22em .5em;transform:rotate(-6deg);background:rgba(138,90,43,.05);
  box-shadow:inset 0 0 0 1px rgba(138,90,43,.18);white-space:nowrap;
}
.stamp-round{border-radius:999px;padding:.28em .7em}
.stamp-ghost{color:rgba(221,243,231,.9);border-color:rgba(221,243,231,.5);background:transparent;box-shadow:none}
.secno{font-family:var(--mono);font-size:.62em;color:var(--stamp);letter-spacing:.06em;margin-right:.55em;vertical-align:.14em;font-weight:500}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 .35rem}

/* ============ 4. topbar 账本抬头 ============ */
.topbar{background:var(--ink);color:#D8E2E4;font-family:var(--mono);font-size:12px;letter-spacing:.04em}
.topbar .wrap{display:flex;align-items:center;gap:1rem;min-height:30px;padding-block:.25rem}
.topbar-brand{color:#F0F4F0;letter-spacing:.16em;text-transform:uppercase;white-space:nowrap}
.tick{display:flex;gap:1rem;margin-left:auto;align-items:center}
.tick-item{display:flex;gap:.4rem;align-items:baseline;font-variant-numeric:tabular-nums}
.tick-sym{color:#8FA6A8;letter-spacing:.08em}
.tick-px{color:var(--deep-num)}
.topbar-note{color:#93A9AB;white-space:nowrap}

/* ============ 5. header + nav ============ */
.site-header{position:sticky;top:0;z-index:40;background:rgba(243,246,241,.94);backdrop-filter:saturate(1.1) blur(2px);border-bottom:3px double var(--rule-2)}
.hdr{display:flex;align-items:center;gap:1.4rem;min-height:62px}
.logo{display:inline-flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--ink)}
.logo svg{display:block;flex:none}
.logo-word{font-family:var(--disp);font-weight:800;font-size:22px;letter-spacing:-.02em;position:relative;line-height:1}
.logo-word .w1{position:relative;color:var(--ink)}
.logo-word .w1::after{content:"";position:absolute;left:-4%;right:-4%;top:52%;height:2px;background:var(--redpen);transform:rotate(-3deg)}
.logo-word .w2{color:var(--ledger)}
.logo-sub{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.1em;display:block;margin-top:2px}
.nav{margin-left:auto;display:flex;align-items:center;gap:1.35rem}
.nav a{font-size:14.5px;text-decoration:none;color:var(--ink-2);padding:.3rem 0;position:relative;white-space:nowrap}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--redpen);transition:right .18s ease}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{right:0}
.nav a[aria-current="page"]{color:var(--ink);font-weight:500}
.nav a[aria-current="page"]::after{right:0;background:var(--ledger)}
.burger{display:none;margin-left:auto;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:.42rem .6rem;cursor:pointer}
.burger span{display:block;width:19px;height:2px;background:var(--ink);margin:3.5px 0}

/* ============ 6. hero ============ */
.hero{padding:2.6rem 0 2.2rem;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;z-index:0;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--line) - 1px),var(--rule) calc(var(--line) - 1px),var(--rule) var(--line));opacity:.85;pointer-events:none}
.hero .wrap{position:relative}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 440px;gap:3rem;align-items:start}
.h1{font-size:clamp(1.95rem,1.1rem + 2.35vw,3.05rem);font-weight:800;margin:0 0 .7rem;letter-spacing:-.02em}
.h1 .ink2{color:var(--ledger)}
.lede{font-size:15.5px;color:var(--ink-2);max-width:46ch;margin-bottom:1.3rem}
.btn-row{display:flex;gap:.7rem;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:.45rem;text-decoration:none;cursor:pointer;
  font-family:var(--sans);font-size:14.5px;font-weight:500;line-height:1;
  padding:.78rem 1.15rem;border-radius:var(--r);border:1.5px solid var(--ink);
  background:var(--card);color:var(--ink);transition:transform .12s ease,box-shadow .12s ease;
  box-shadow:2px 2px 0 rgba(20,32,43,.16);
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:3px 3px 0 rgba(20,32,43,.22);color:var(--ink)}
.btn:active{transform:translate(1px,1px);box-shadow:1px 1px 0 rgba(20,32,43,.2)}
.btn-primary{background:var(--ledger);border-color:var(--ledger);color:#F2FBF6;box-shadow:2px 2px 0 rgba(31,95,69,.3)}
.btn-primary:hover{color:#fff;box-shadow:3px 3px 0 rgba(31,95,69,.38)}
.btn-sm{padding:.5rem .8rem;font-size:13px}
.hero-fact{min-width:0}
.hero-fact b{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:20px;font-weight:500;color:var(--ink)}
.hero-fact span{font-size:12px;color:var(--muted);line-height:1.45;display:block}

/* ============ 7. 对账单卡 STATEMENT ============ */
.stmt{
  background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);
  box-shadow:var(--shadow-lift);position:relative;padding:1.15rem 1.15rem 1rem;
}
.stmt-head{display:flex;align-items:baseline;gap:.6rem;border-bottom:2px solid var(--ink);padding-bottom:.5rem;margin-bottom:.15rem}
.stmt-title{font-family:var(--disp);font-size:15.5px;font-weight:700;margin:0;letter-spacing:-.01em}
.stmt-title small{font-family:var(--mono);font-weight:400;font-size:10.5px;letter-spacing:.14em;color:var(--muted);margin-left:.4rem;text-transform:uppercase}
.stmt-no{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--stamp);letter-spacing:.06em}
.stmt-rows{display:block}
.stmt-row{display:flex;align-items:center;gap:.6rem;min-height:38px;border-bottom:1px dotted var(--rule-2);padding:.15rem 0}
.stmt-row:last-of-type{border-bottom:0}
.stmt-label{font-size:13.5px;color:var(--ink-2);display:flex;align-items:center;gap:.4rem;flex:1;min-width:0}
.stmt-label .tag{font-family:var(--mono);font-size:10px;color:var(--muted);border:1px solid var(--rule-2);border-radius:2px;padding:0 .28em}
.stmt-val{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14.5px;text-align:right;white-space:nowrap}
.stmt-val.minus{color:var(--ledger)}
.stmt-input{
  width:132px;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14.5px;text-align:right;
  padding:.34rem .5rem;border:1px solid var(--rule-2);border-radius:2px;background:var(--paper);color:var(--ink);
}
.stmt-input:focus{border-color:var(--ledger);background:#fff}
.switch{position:relative;display:inline-flex;align-items:center;gap:.45rem;cursor:pointer;user-select:none}
.switch input{position:absolute;opacity:0;width:0;height:0}
.switch .track{width:34px;height:18px;border-radius:2px;border:1.5px solid var(--ink-2);background:var(--paper-2);position:relative;transition:background .15s ease,border-color .15s ease;flex:none}
.switch .track::after{content:"";position:absolute;top:1.5px;left:1.5px;width:12px;height:12px;background:var(--ink-2);border-radius:1px;transition:transform .15s ease,background .15s ease}
.switch input:checked + .track{background:var(--ledger-bg);border-color:var(--ledger)}
.switch input:checked + .track::after{transform:translateX(15px);background:var(--ledger)}
.switch input:focus-visible + .track{outline:2px solid var(--redpen);outline-offset:2px}
.stmt-total{display:flex;align-items:flex-end;gap:.8rem;border-top:2px solid var(--ink);margin-top:.35rem;padding-top:.7rem}
.stmt-total-l{flex:1;min-width:0}
.stmt-total-l .k{font-size:12px;color:var(--muted);display:block;letter-spacing:.02em}
.stmt-big{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(1.7rem,1.2rem + 1.5vw,2.3rem);font-weight:500;color:var(--ledger);line-height:1.05;display:block}
.stmt-big .unit{font-size:.46em;color:var(--muted);margin-left:.28em;letter-spacing:.06em}
.code-line{
  display:flex;align-items:center;gap:.7rem;margin-top:.75rem;padding:.6rem .7rem;
  background:var(--ledger-bg);border:1px dashed rgba(31,95,69,.45);border-radius:2px;flex-wrap:wrap;
}
.code-k{font-size:11.5px;color:var(--ledger);letter-spacing:.05em;line-height:1.3}
.code-chip{
  font-family:var(--mono);font-size:22px;font-weight:500;letter-spacing:.12em;color:var(--ink);
  background:var(--card);border:1.5px solid var(--ledger);border-radius:2px;padding:.16rem .6rem;line-height:1.25;
}
.btn-copy{
  margin-left:auto;background:var(--ink);color:#F2F6F1;border:1.5px solid var(--ink);border-radius:2px;
  font-size:13px;padding:.52rem .85rem;cursor:pointer;line-height:1;white-space:nowrap;
  transition:background .15s ease,color .15s ease,border-color .15s ease;
}
.btn-copy:hover{background:var(--ink-2)}
.btn-copy.done{background:rgba(138,90,43,.1);color:var(--stamp);border-color:var(--stamp);transform:rotate(-2deg)}
.stmt-foot{font-size:11.5px;color:var(--muted);line-height:1.55;margin:.6rem 0 0}
.fnote{color:var(--stamp);font-family:var(--mono);font-size:.86em;vertical-align:.35em}

/* ============ 8. sections ============ */
.band{padding:2.6rem 0;border-top:1px solid var(--rule)}
.band-paper2{background:var(--paper-2)}
.band-ink{background:var(--ink);color:#DCE5E6}
.sec-head{display:flex;align-items:flex-end;gap:1rem;margin-bottom:1.4rem;border-bottom:3px double var(--rule-2);padding-bottom:.6rem}
.sec-title{font-size:clamp(1.25rem,1rem + .8vw,1.65rem);margin:0}
.sec-note{margin-left:auto;font-size:12.5px;color:var(--muted);text-align:right;line-height:1.5}
.sec-more{margin-left:auto;font-size:13px;font-family:var(--mono);color:var(--ledger);text-decoration:none;border-bottom:1px solid var(--ledger)}

/* 本周账本要点:不对称一宽两窄 */
.brief-grid{display:grid;grid-template-columns:1.62fr 1fr 1fr;gap:1.1rem;align-items:stretch}
.brief{background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:1.1rem 1.15rem;box-shadow:var(--shadow-card);display:flex;flex-direction:column}
.brief h3{font-size:16px;margin:0 0 .6rem}
.miscalc{list-style:none;margin:0;padding:0;counter-reset:mis}
.miscalc li{counter-increment:mis;display:flex;gap:.7rem;padding:.55rem 0;border-bottom:1px dotted var(--rule-2);font-size:14px;line-height:1.6}
.miscalc li:last-child{border-bottom:0}
.miscalc li::before{content:counter(mis,decimal-leading-zero);font-family:var(--mono);color:var(--redpen);font-size:12px;padding-top:.25em;flex:none}
.miscalc a{text-decoration:none;border-bottom:1px solid var(--rule-2)}
.miscalc a:hover{border-bottom-color:var(--redpen)}
.brief p{font-size:13.8px;color:var(--ink-2);margin-bottom:.8rem}
.brief-foot{margin-top:auto;padding-top:.5rem;font-size:13px}
.brief-foot a{font-family:var(--mono);font-size:12.5px;text-decoration:none;color:var(--ledger);border-bottom:1px solid rgba(31,95,69,.4)}
.brief-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:26px;color:var(--ink);display:block;line-height:1.1;margin-bottom:.2rem}

/* 工具柜 */
.rack{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.tool-card{
  background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:1rem 1rem .9rem;
  text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:.55rem;
  box-shadow:var(--shadow-card);transition:transform .14s ease,box-shadow .14s ease,border-color .14s ease;
}
.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:var(--ledger);color:var(--ink)}
.tool-top{display:flex;align-items:center;gap:.55rem}
.tool-top svg{flex:none;color:var(--ledger)}
.tool-name{font-family:var(--disp);font-weight:700;font-size:15.5px}
.tool-idx{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--muted)}
.tool-desc{font-size:13.2px;color:var(--ink-2);line-height:1.6;margin:0}
.tool-prev{
  background:var(--deep);border-radius:2px;padding:.55rem .7rem;display:flex;align-items:baseline;gap:.5rem;
  font-family:var(--mono);font-variant-numeric:tabular-nums;margin-top:auto;
}
.tool-prev .pv-k{font-size:10.5px;color:#93A9AB;letter-spacing:.08em;text-transform:uppercase}
.tool-prev .pv-v{margin-left:auto;font-size:16px;color:var(--deep-num)}
.tool-card.soon .tool-prev .pv-v{color:#9FB3B5}
.tool-card-lead{grid-column:span 2;border-top:3px solid var(--ledger)}
.tool-card-lead .tool-name{font-size:18px}
.tool-card-lead .tool-desc{font-size:14px;max-width:52ch}

/* 账本目录表 */
.ledger-table{font-size:14.2px}
.ledger-table caption{text-align:left;font-family:var(--mono);font-size:11.5px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase;padding-bottom:.5rem}
.ledger-table thead th{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  font-weight:400;text-align:left;padding:.4rem .6rem;border-bottom:2px solid var(--ink);white-space:nowrap;
}
.ledger-table tbody tr{border-bottom:1px solid var(--rule)}
.ledger-table tbody tr:hover{background:var(--ledger-bg)}
.ledger-table td{padding:.52rem .6rem;vertical-align:baseline}
.lt-no{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12px;color:var(--muted);width:1%;white-space:nowrap}
.lt-title a{text-decoration:none;font-weight:500}
.lt-title a:hover{text-decoration:underline;text-decoration-color:var(--redpen)}
.lt-cat{width:1%;white-space:nowrap}
.lt-date{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12.5px;color:var(--muted);width:1%;white-space:nowrap;text-align:right}
.cat{font-family:var(--mono);font-size:11px;border-radius:2px;color:var(--ink-2);background:var(--paper)}
.cat-fee{color:var(--ink);border-color:rgba(20,32,43,.35)}
.cat-save{color:var(--ledger);border-color:rgba(31,95,69,.4);background:var(--ledger-bg)}
.cat-hidden{color:var(--redpen);border-color:rgba(194,40,31,.35);background:var(--redpen-bg)}
.cat-open{color:var(--stamp);border-color:rgba(138,90,43,.4);background:rgba(138,90,43,.06)}

/* 常见误算 Q&A */
.qa{display:grid;grid-template-columns:repeat(2,1fr);gap:0 2.4rem}
.qa-item{padding:.9rem 0;border-bottom:1px solid var(--rule)}
.qa-q{font-size:15px;margin:0 0 .35rem;display:flex;gap:.5rem;align-items:baseline}
.qa-q .qmark{font-family:var(--mono)}
.qa-a{font-size:13.8px;color:var(--ink-2);margin:0;line-height:1.72}

/* ============ 9. footer ============ */
.site-footer{background:var(--ink);color:#C6D2D4;margin-top:3rem;padding:2.4rem 0 1.6rem;font-size:13.5px}
.site-footer a{color:#D9E3E4;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--redpen)}
.foot-top{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:1.6rem;padding-bottom:1.6rem;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand .logo-word{color:#F0F4F0;font-size:20px}
.foot-brand .logo-word .w1{color:#F0F4F0}
.foot-brand .logo-word .w2{color:#7FD3A9}
.foot-brand p{font-size:12.5px;color:#93A6A8;margin:.7rem 0 0;line-height:1.65;max-width:30ch}
.foot-h{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#93A9AB;margin:0 0 .6rem}
.foot-links{list-style:none;margin:0;padding:0}
.foot-links li{margin:.3rem 0}
.disclose{padding-top:1.2rem;font-size:12.3px;color:#8FA1A3;line-height:1.75;max-width:92ch}
.disclose a{border-bottom:1px solid rgba(255,255,255,.22)}
.foot-bottom{display:flex;gap:1rem;flex-wrap:wrap;align-items:center;padding-top:1rem;font-family:var(--mono);font-size:11.5px;color:#93A9AB;letter-spacing:.03em}
.foot-bottom .sep{opacity:.4}

/* ============ 10. 文章页 ============ */
.crumbs{font-family:var(--mono);font-size:12px;color:var(--muted);padding:1rem 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;margin:0;padding:0}
.crumbs a{text-decoration:none;color:var(--ink-2)}
.crumbs li + li::before{content:"/";margin-right:.4rem;color:var(--rule-2)}
.page{display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:2.6rem;align-items:start;padding:1.2rem 0 2rem}
.art{max-width:760px}
.art-head{margin-bottom:1.4rem;position:relative}
.art h1{font-size:clamp(1.75rem,1.2rem + 1.7vw,2.5rem);margin:0 0 .6rem}
.art-dek{font-size:15.5px;color:var(--ink-2);margin:0 0 .9rem}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem .9rem;font-family:var(--mono);font-size:12px;color:var(--muted)}
.art-meta .by{color:var(--ink-2)}
.art-meta .dot{opacity:.45}
.art-meta .stamp{margin-left:auto}
.art-body{
  position:relative;padding-left:1.6rem;
  background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--line) - 1px),var(--rule) calc(var(--line) - 1px),var(--rule) var(--line));
  background-position:0 .55rem;
}
.art-body::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;border-left:1px solid var(--margin-rule);border-right:1px solid var(--margin-rule)}
.art-body > h2{font-size:clamp(1.2rem,1rem + .6vw,1.45rem);margin:2.2rem 0 .7rem;scroll-margin-top:82px}
.art-body > h3{font-size:1.06rem;margin:1.5rem 0 .5rem;scroll-margin-top:82px}
.art-body p,.art-body li{font-size:15.6px}
.art-body strong{font-weight:700}
.note-red,.note-green{border-radius:var(--r);padding:.85rem 1rem;margin:1.4rem 0;font-size:14.4px;line-height:1.72;background:var(--card)}
.note-red{border:1px solid rgba(194,40,31,.3);border-left:4px solid var(--redpen);background:var(--redpen-bg)}
.note-green{border:1px solid rgba(31,95,69,.28);border-left:4px solid var(--ledger);background:var(--ledger-bg)}
.note-red .nh{color:var(--redpen)}
.note-green .nh{color:var(--ledger)}
.note-red p:last-child,.note-green p:last-child{margin-bottom:0}
figure.ledger-shot{margin:1.6rem 0;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:.5rem;box-shadow:var(--shadow-card)}
figure.ledger-shot img{border:1px solid var(--rule);border-radius:2px}
figure.ledger-shot figcaption{font-size:12.3px;color:var(--muted);padding:.55rem .35rem .2rem;line-height:1.6;display:flex;gap:.6rem;align-items:baseline}
figure.ledger-shot figcaption .cap-no{font-family:var(--mono);color:var(--stamp);white-space:nowrap}
.data-table{margin:1.4rem 0;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);overflow-x:auto;position:relative}
.data-table table{font-size:13.6px;min-width:660px}
.data-table th{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:400;text-align:left;padding:.55rem .7rem;border-bottom:2px solid var(--ink);background:var(--paper-2);white-space:nowrap}
.data-table td{padding:.52rem .7rem;border-bottom:1px solid var(--rule);font-variant-numeric:tabular-nums;vertical-align:top}
.data-table td.n,.data-table th.n{font-family:var(--mono);text-align:right}
.data-table tbody tr:hover{background:var(--paper)}
.data-table .best{background:var(--ledger-bg)}
.data-table .best td{color:var(--ledger)}
.table-cap{font-size:12.2px;color:var(--muted);padding:.5rem .7rem;display:flex;gap:.7rem;align-items:center;flex-wrap:wrap}
.faq{margin-top:2.4rem;border-top:3px double var(--rule-2);padding-top:1.2rem}
.faq h2{font-size:1.35rem}
.faq h3{font-size:1.02rem;margin:1.3rem 0 .35rem;display:flex;gap:.5rem}
.faq h3::before{content:"Q";font-family:var(--mono);color:var(--redpen);font-size:.8em;padding-top:.15em}
.faq p{font-size:14.8px;color:var(--ink-2)}
.related{margin-top:2.2rem;border-top:1px solid var(--rule);padding-top:1rem}
.related h2{font-size:1.1rem;margin-bottom:.7rem}
.rel-list{list-style:none;padding:0;margin:0;display:grid;gap:.5rem}
.rel-list li{font-size:14.2px}
.rel-list .rel-no{font-family:var(--mono);font-size:11.5px;color:var(--stamp)}
.rel-list a{text-decoration:none}
.art-disclose{margin-top:1.4rem;font-size:12.2px;color:var(--muted);line-height:1.7;border-left:2px solid var(--rule-2);padding-left:.8rem}

/* 右侧 sticky 栏 */
.side{position:sticky;top:84px;display:grid;gap:1rem}
.side-card{background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:.9rem 1rem;box-shadow:var(--shadow-card)}
.side-h{font-family:var(--mono);font-size:11px;letter-spacing:.11em;text-transform:uppercase;color:var(--muted);margin:0 0 .6rem;padding-bottom:.4rem;border-bottom:1px solid var(--rule)}
.toc-list{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc-list li{counter-increment:toc;font-size:13.4px;line-height:1.55;padding:.28rem 0;display:flex;gap:.55rem}
.toc-list li::before{content:"§" counter(toc,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--stamp);flex:none;padding-top:.2em}
.toc-list a{text-decoration:none;color:var(--ink-2)}
.toc-list a:hover{color:var(--redpen)}
.side-points{margin:0;padding-left:1.1em;font-size:13.4px;color:var(--ink-2);line-height:1.65}
.side-points li{margin:.35rem 0}
.code-card{background:var(--ledger-bg);border:1px solid rgba(31,95,69,.35)}
.code-card .code-chip{font-size:19px;display:inline-block}
.code-card .btn-copy{margin:.6rem 0 0;width:100%;text-align:center;justify-content:center;display:block}
.code-card p{margin:.55rem 0 0;font-size:11.5px;color:var(--ink-2);line-height:1.55}

/* ============ 11. 工具页 ============ */
.tool-head{padding:1.4rem 0 1.2rem;border-bottom:3px double var(--rule-2);margin-bottom:1.6rem}
.tool-head h1{font-size:clamp(1.6rem,1.15rem + 1.5vw,2.25rem);margin:0 0 .5rem}
.tool-head .lede{margin-bottom:.6rem;max-width:64ch;font-size:15px}
.tool-head .meta-row{display:flex;gap:.8rem;flex-wrap:wrap;align-items:center;font-family:var(--mono);font-size:11.5px;color:var(--muted)}
.tool-io{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:1.6rem;align-items:start}
.io-inputs{background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:1.1rem;box-shadow:var(--shadow-card);display:grid;gap:.95rem;position:sticky;top:84px}
.field{display:grid;gap:.32rem}
.field-label{font-size:12.5px;color:var(--ink-2);display:flex;align-items:center;gap:.4rem}
.field-label .hint{font-family:var(--mono);font-size:10.5px;color:var(--muted);margin-left:auto}
.input,.select{
  width:100%;padding:.55rem .6rem;border:1px solid var(--rule-2);border-radius:2px;background:var(--paper);
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14.5px;
}
.select{background:var(--paper) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0h10L5 6z' fill='%236B7A86'/></svg>") no-repeat right .6rem center;appearance:none;padding-right:1.6rem}
.input:focus,.select:focus{border-color:var(--ledger);background-color:#fff}
.seg{display:flex}
.seg button{flex:1;background:var(--paper);border:0;padding:.5rem .4rem;font-size:13.5px;cursor:pointer;color:var(--ink-2)}
.seg button + button{border-left:1px solid var(--rule-2)}
.seg button[aria-pressed="true"]{background:var(--ink);color:#F2F6F1}
.io-out{display:grid;gap:1rem;min-width:0}
.result-deep{
  background:var(--deep);color:#CFE0E2;border-radius:var(--r);padding:1.2rem 1.25rem;position:relative;overflow:hidden;
  box-shadow:0 18px 40px -26px rgba(16,32,42,.9);
  background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,rgba(255,255,255,.035) 31px,rgba(255,255,255,.035) 32px);
}
.rd-stamp{position:absolute;top:.9rem;right:.9rem}
.rd-k{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#93A9AB;margin:0 0 .3rem}
.rd-big{
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:500;
  font-size:clamp(2rem,1.3rem + 2.6vw,3.2rem);line-height:1.02;color:var(--deep-num);margin:0;display:block;
}
.rd-big .unit{font-size:.34em;color:#8FA6A8;margin-left:.3em;letter-spacing:.08em}
.rd-big.warn{color:#F2A9A2}
.rd-sub{font-size:13px;color:#9FB3B5;margin:.5rem 0 0;line-height:1.6}
.rd-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.9rem;margin-top:1.1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.14)}
.rd-item .k{display:block;font-size:11px;color:#93A9AB;letter-spacing:.06em;margin-bottom:.15rem}
.rd-item .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:17px;color:#E6F0F1}
.rd-item .v.pos{color:#7FD3A9}
.rd-item .v.neg{color:#F2A9A2}
.bar{height:6px;background:rgba(255,255,255,.12);border-radius:1px;margin-top:.9rem;overflow:hidden}
.bar span{display:block;height:100%;background:linear-gradient(90deg,#2E8B63,#7FD3A9)}
.depth{display:grid;gap:2px;margin-top:1rem}
.depth-row{display:grid;grid-template-columns:78px 1fr 96px;align-items:center;gap:.5rem;font-family:var(--mono);font-size:11.5px;color:#9FB3B5}
.depth-bar{height:9px;background:rgba(127,211,169,.18);position:relative;border-radius:1px}
.depth-bar i{position:absolute;inset:0 auto 0 0;background:rgba(127,211,169,.55);border-radius:1px;display:block}
.depth-row.sell .depth-bar{background:rgba(242,169,162,.16)}
.depth-row.sell .depth-bar i{background:rgba(242,169,162,.5)}
.state{font-size:13.5px;padding:.8rem .95rem;border-radius:var(--r);line-height:1.7}
.state-loading{background:var(--paper-2);border:1px dashed var(--rule-2);color:var(--ink-2)}
.state-err{background:var(--redpen-bg);border:1px solid rgba(194,40,31,.35);border-left:4px solid var(--redpen);color:var(--ink)}
.state-err b{color:var(--redpen)}
.state-ok{background:var(--ledger-bg);border:1px solid rgba(31,95,69,.3);color:var(--ink-2)}
.tool-note{font-size:12.5px;color:var(--muted);line-height:1.7}
.guide{margin:2.2rem 0 0;background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);box-shadow:var(--shadow-card)}
.guide > summary{
  cursor:pointer;list-style:none;padding:.95rem 1.1rem;font-family:var(--disp);font-weight:700;font-size:15.5px;
  display:flex;align-items:center;gap:.6rem;
}
.guide > summary::-webkit-details-marker{display:none}
.guide > summary::after{margin-left:auto;line-height:1}
.guide[open] > summary{border-bottom:1px solid var(--rule)}
.guide-body{padding:.4rem 1.1rem 1.3rem}
.guide-body h3{font-size:1rem;margin:1.3rem 0 .4rem}
.guide-body h3 .secno{font-size:.66em}
.guide-body p,.guide-body li{font-size:14.3px;color:var(--ink-2);line-height:1.78}
.badge-best{font-family:var(--mono);font-size:10.5px;color:var(--ledger);border:1px solid rgba(31,95,69,.45);border-radius:2px;padding:0 .35em;white-space:nowrap;background:#fff}
.pair-list{display:flex;gap:.4rem;flex-wrap:wrap}
.chip{
  font-family:var(--mono);font-size:12px;border:1px solid var(--rule-2);background:var(--paper);border-radius:2px;
  padding:.25rem .5rem;cursor:pointer;color:var(--ink-2);
}
.chip[aria-pressed="true"]{background:var(--ink);color:#F2F6F1;border-color:var(--ink)}
.tool-foot{margin-top:2rem;border-top:1px solid var(--rule);padding-top:1rem;font-size:12.2px;color:var(--muted);line-height:1.75}

/* ============ 12. 合规页 / 404 ============ */
.legal{padding:1.4rem 0 2rem}
.legal h1{font-size:clamp(1.6rem,1.2rem + 1.2vw,2.1rem);border-bottom:3px double var(--rule-2);padding-bottom:.6rem}
.legal h2{font-size:1.15rem;margin:2rem 0 .6rem}
.legal p,.legal li{font-size:15px;color:var(--ink-2)}
.legal .updated{font-family:var(--mono);font-size:12px;color:var(--muted)}
.nf{padding:3.4rem 0 3rem;display:grid;grid-template-columns:200px minmax(0,1fr);gap:2.2rem;align-items:center}
.nf-card{background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r);padding:1rem;box-shadow:var(--shadow-card);text-align:center}
.nf-card .nf-no{font-family:var(--mono);font-size:44px;color:var(--redpen);line-height:1;display:block}
.nf-card .nf-k{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.nf h1{font-size:clamp(1.5rem,1.2rem + 1.2vw,2rem)}
.nf ul{list-style:none;padding:0;display:flex;gap:.7rem;flex-wrap:wrap}

/* ============ 13. 响应式 ============ */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:minmax(0,1fr) 400px;gap:2rem}
  .page{grid-template-columns:minmax(0,1fr) 260px;gap:1.8rem}
  .foot-top{grid-template-columns:1fr 1fr 1fr;gap:1.3rem}
  .foot-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:1.4rem}
  .rack{grid-template-columns:repeat(2,1fr)}
  .tool-card-lead{grid-column:1 / -1}
  .brief-grid{grid-template-columns:1fr 1fr}
  .brief-wide{grid-column:1 / -1}
  .page{grid-template-columns:minmax(0,1fr)}
  .side{position:static;grid-template-columns:1fr 1fr;display:grid}
  .tool-io{grid-template-columns:minmax(0,1fr)}
  .io-inputs{position:static}
  .qa{grid-template-columns:1fr}
}
@media (max-width:720px){
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);
    border-bottom:3px double var(--rule-2);flex-direction:column;align-items:stretch;gap:0;padding:.4rem 0;
    box-shadow:0 14px 24px -18px rgba(20,32,43,.7);
  }
  .nav.open{display:flex}
  .nav a{padding:.7rem 1.25rem;border-bottom:1px dotted var(--rule-2);font-size:15px}
  .nav a::after{display:none}
  .burger{display:block}
  .topbar-note{display:none}
  .site-header{position:relative}
  .hdr{min-height:54px}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .wrap,.wrap-narrow{width:calc(100% - 1.6rem)}
  .hero{padding:1.1rem 0 1.4rem}
  .h1{font-size:clamp(1.42rem,1rem + 2.4vw,1.85rem);margin-bottom:.45rem;line-height:1.28}
  .lede{font-size:12.9px;line-height:1.56;margin-bottom:.75rem;max-width:none}
  .hero .kicker{display:none}
  .hero-btns .btn{padding:.6rem .85rem;font-size:13.5px}
  .btn-row{gap:.55rem}
  .hero-lede-long{display:none}
  .hero-btns{order:3;margin-top:1.1rem}
  .hero-facts{display:none}
  .stmt{padding:.9rem .9rem .8rem;order:2}
  .stmt-row{min-height:32px}
  .stmt-label{font-size:12.6px}
  .stmt-val,.stmt-input{font-size:13.5px}
  .stmt-input{width:112px}
  .stmt-big{font-size:1.75rem}
  .code-chip{font-size:19px}
  .btn-copy{font-size:12.5px;padding:.48rem .7rem}
  .stmt-foot{font-size:11px}
  .hero-left{display:flex;flex-direction:column}
  .rack{grid-template-columns:1fr}
  .tool-card-lead{grid-column:auto}
  .brief-grid{grid-template-columns:1fr}
  .side{grid-template-columns:1fr}
  .art-body{padding-left:1rem}
  .ledger-table{font-size:13.2px}
  .ledger-table .lt-cat,.ledger-table thead th.h-cat{display:none}
  .band{padding:1.9rem 0}
  .foot-top{grid-template-columns:1fr 1fr}
  .nf{grid-template-columns:1fr;gap:1.2rem}
  .depth-row{grid-template-columns:64px 1fr 78px;font-size:10.5px}
}
@media (max-width:400px){
  .hero{padding:.75rem 0 1rem}
  .h1{margin-bottom:.3rem}
  .lede{margin-bottom:.5rem;font-size:12.4px;line-height:1.5}
  .stmt-row{min-height:29px}
  .stmt{padding:.75rem .8rem .7rem}
  .stmt-head{margin-bottom:.3rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}
@media print{
  .topbar,.site-header,.side,.site-footer,.btn-row{display:none}
  body{background:#fff}
}

/* ============ 14. 补充组件(工具页表格 / 工具索引 / 小工具类) ============ */
.meta-row .dot,.art-meta .dot{opacity:.45}
.band-flush{border-top:1px solid var(--rule);margin-top:2.2rem;padding-bottom:.2rem}
.rate-pos{color:var(--redpen)}
.rate-neg{color:var(--ledger)}
.pos-cost{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:500;color:var(--ledger)}
.mt-s{margin:.6rem 0 0}
.io-inputs .btn{justify-content:center;width:100%}
.data-table tbody tr{cursor:default}

/* 15. 阶段 2 新增:滑块 / 文章封面 / 索引分组 */
.range{width:100%;height:26px;accent-color:var(--ledger);background:transparent;cursor:pointer}
.range:focus-visible{outline:2px solid var(--redpen);outline-offset:2px}
figure.article-cover{background:var(--card);border:1px solid var(--rule-2);border-radius:var(--r)}
figure.article-cover img{border-radius:2px;width:100%;height:auto}
.idx-group{margin:0 0 2.2rem}
.idx-group h2{display:flex;align-items:baseline;gap:.6rem;font-size:1.2rem;border-bottom:2px solid var(--ink);padding-bottom:.45rem}
.idx-group h2 .cnt{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--muted);font-weight:400}
.idx-lede{font-size:14px;color:var(--ink-2);margin:.7rem 0 1rem;max-width:74ch}
.lt-words{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12.5px;color:var(--muted);width:1%;white-space:nowrap;text-align:right}

/* ============ 16. 阶段 3 · 印刷精修(2026-08-23) ============ */
:root{--note-paper:#F7F1DC;          --tape:rgba(226,219,196,.85);  --seal:rgba(138,90,43,.7);}

.hero{padding:2.2rem 0 2rem}
.hero::before{opacity:.42}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.7;z-index:0; background-image:radial-gradient(rgba(20,32,43,.05) .6px,transparent .8px),linear-gradient(112deg,rgba(255,255,255,.55) 0 34%,rgba(255,255,255,0) 62%);background-size:7px 7px,100% 100%;}
.hero-seal{ position:absolute;top:158px;right:calc(440px + 1.2rem);width:296px;height:296px;border-radius:50%; border:4px solid var(--stamp);display:none;align-items:center;justify-content:center; flex-direction:column;gap:.4rem;transform:rotate(-9deg);opacity:.065;pointer-events:none;font-family:var(--mono);color:var(--stamp);letter-spacing:.28em;box-shadow:inset 0 0 0 7.5px var(--stamp);}
.hero-seal b{font-size:30px;font-weight:500;line-height:1}
.hero-seal i{font-style:normal;font-size:13px;letter-spacing:.34em}
.hero-seal em{font-style:normal;font-size:11px;letter-spacing:.3em;opacity:.85}
.kicker-ledger{display:flex;align-items:center;gap:.65rem;margin:0 0 .8rem;padding-bottom:.42rem; font-family:var(--mono);font-size:11.5px;letter-spacing:.17em;text-transform:uppercase; color:var(--ink-2);border-bottom:1.5px solid var(--margin-rule);max-width:30rem;}
.kicker-ledger b{font-weight:500;color:var(--redpen)}
.kicker-ledger .kl-d{opacity:.4}
.kicker-ledger .kl-f{flex:1;height:1px;background:repeating-linear-gradient(90deg,var(--rule-2) 0 3px,transparent 3px 7px)}
/* 标题落在账页的「抬头区」:洗掉它背后的账页横线,免得横线穿过大字像删除线 */
.h1{font-size:clamp(2rem,1.02rem + 2.75vw,3.4rem);line-height:1.12;margin-bottom:.62rem; background:var(--paper);box-shadow:0 0 0 5px var(--paper)}
.hero .lede{max-width:44em;font-size:15px;margin-bottom:1.25rem}

.hero-sum{display:flex;align-items:stretch;gap:1rem;margin-top:1.45rem;max-width:720px; border-top:2px solid var(--ink);border-bottom:1px solid var(--rule-2);padding:.7rem 0 .65rem;}
.hero-sum-tag{align-self:center;flex:none}
.hero-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:0;padding:0;border:0;max-width:none;flex:1}
.hero-fact{padding:0 1rem;border-left:1px solid var(--rule-2)}
.hero-fact:first-child{border-left:0;padding-left:.9rem}
.hero-fact b{font-size:23px;letter-spacing:-.015em;line-height:1.1}
.hero-fact span{font-size:11.4px;line-height:1.42;margin-top:.18rem}

.stmt{--pad:1.15rem;padding:1.35rem var(--pad) 1rem;border-top-color:transparent}
.stmt::before{content:"";position:absolute;top:-1px;left:0;right:0;height:9px; background:radial-gradient(circle at 7px 0,var(--paper) 0 6px,rgba(20,32,43,.18) 6px 6.9px,transparent 7px); background-size:14px 9px;background-repeat:repeat-x;filter:none;}
.stmt-foot{position:relative;border-top:1.5px dashed var(--rule-2);margin-top:.85rem;padding-top:.68rem}
.stmt-foot::before,.stmt-foot::after{content:"";position:absolute;top:-8px;width:14px;height:14px;border-radius:50%; background:var(--paper);box-shadow:inset 0 0 0 1px var(--rule-2);}
.stmt-foot::before{left:calc(-1 * var(--pad) - 7px)}
.stmt-foot::after{right:calc(-1 * var(--pad) - 7px)}
@keyframes fr-flip{from{transform:translateY(-.15em) scaleY(.9);opacity:.3}to{transform:none;opacity:1}}
.num-flip{animation:fr-flip .2s ease-out}
.stmt-big{transform-origin:left bottom}

.stmt-total{gap:1rem}
.stmt-save{display:grid;gap:.1rem;margin:0;text-align:left;min-width:9.9rem;line-height:1.45}
.stmt-save .ss-row{display:flex;align-items:baseline;justify-content:space-between;gap:.7rem}
.stmt-save dt{margin:0;font-size:11.5px;color:var(--muted);white-space:nowrap}
.stmt-save dd{margin:0;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--muted)}
.stmt-save .ss-hi{border-top:1px solid var(--rule-2);margin-top:.18rem;padding-top:.22rem}
.stmt-save .ss-hi dt{color:var(--redpen)}
.stmt-save .ss-hi dd{font-size:19px;font-weight:500;color:var(--redpen)}

.code-line{position:relative}
.copy-stamp{position:absolute;left:50%;top:50%;z-index:3;pointer-events:none;white-space:nowrap; transform:translate(-50%,-50%) rotate(-13deg);opacity:0;visibility:hidden; font-family:var(--mono);font-size:19px;letter-spacing:.24em;color:rgba(138,90,43,.92); border:2.5px solid var(--seal);border-radius:3px;padding:.14em .42em .14em .64em; background:rgba(243,246,241,.78);box-shadow:inset 0 0 0 1.5px rgba(138,90,43,.28);}
.code-line.stamped .copy-stamp{opacity:1;visibility:visible;animation:fr-stamp .4s cubic-bezier(.2,.9,.3,1.35)}
@keyframes fr-stamp{
  0%{transform:translate(-50%,-50%) rotate(-26deg) scale(1.34);opacity:0}
  45%{opacity:1}
  100%{transform:translate(-50%,-50%) rotate(-13deg) scale(1);opacity:1}
}

.brief-wide{border-left:2px solid var(--redpen);position:relative;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--line) - 1px),var(--rule) calc(var(--line) - 1px),var(--rule) var(--line));background-position:0 1.4rem}
.brief-wide::before{content:"";position:absolute;left:3px;top:0;bottom:0;width:1px;background:rgba(194,40,31,.38)}
.brief-index,.brief-sticky{align-self:start}
.brief-index{border-top:3px solid var(--ledger);border-left:1px solid var(--rule-2);position:relative;background:linear-gradient(180deg,#FBFDFA,var(--card) 42%)}
.brief-index::before{content:"";position:absolute;top:-3px;left:0;width:88px;height:10px;background:var(--ledger)}
.brief-index::after{content:"";position:absolute;top:-3px;left:96px;width:42px;height:10px;background:rgba(138,90,43,.5)}
.brief-sticky{background:var(--note-paper);border-color:rgba(138,90,43,.24);border-left:1px solid rgba(138,90,43,.24); transform:rotate(-1deg);position:relative; box-shadow:0 1px 0 rgba(20,32,43,.07),0 16px 28px -22px rgba(20,32,43,.85);}
.brief-sticky::before{content:"";position:absolute;top:-9px;left:50%;width:98px;height:19px; transform:translateX(-50%) rotate(2.4deg);background:var(--tape); border:1px solid rgba(138,90,43,.16);box-shadow:0 1px 2px rgba(20,32,43,.1);}
.brief-sticky .brief-num{color:var(--stamp)}
.brief-sticky p.small{color:var(--ink-2)}

.band-ink .sec-head{border-bottom-color:rgba(255,255,255,.2)}
.band-ink .sec-title{color:#F0F4F0}
.band-ink .secno{color:#C99A63}
.band-ink .sec-note{color:#B9C8CA}
.band-ink .sec-more{color:#7FD3A9;border-bottom-color:rgba(127,211,169,.5)}
.band-ink .sec-more:hover{color:#A9E7C6}
.band-ink .tool-card{background:var(--paper);border-color:rgba(255,255,255,.08);box-shadow:0 12px 26px -18px rgba(0,0,0,.95)}
.band-ink .tool-card:hover{border-color:var(--ledger-2);box-shadow:0 18px 32px -18px rgba(0,0,0,1)}
.band-ink .tool-prev{background:var(--deep-2);box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}
.band-ink .tool-card-lead{border-top:3px solid var(--ledger-2)}
.tool-ico{width:30px;height:30px;flex:none;display:inline-flex;align-items:center;justify-content:center; border:1px solid rgba(20,32,43,.2);border-radius:2px;background:#fff;color:var(--ledger); transition:border-color .14s ease,background .14s ease;}
.tool-card:hover .tool-ico{border-color:var(--ledger);background:var(--ledger-bg)}
.tool-top svg{color:inherit}

.ledger-table thead tr{border-top:1px solid var(--rule-2)}
.ledger-table thead th{border-bottom:3px double var(--ink);color:var(--ink-2);padding-bottom:.34rem}
.lt-no{color:var(--stamp);position:relative;padding-left:.8rem}
.ledger-table tbody tr:hover .lt-no::before{content:"";position:absolute;left:.05rem;top:.3rem;bottom:.3rem;width:2px;background:var(--redpen);border-radius:1px}
.cat{border:1px solid;outline:1px solid;outline-offset:2px;letter-spacing:.08em;padding:.1em .48em}

.qa{counter-reset:qa;position:relative}
.qa-item{counter-increment:qa}
.qa-q{align-items:center;gap:.6rem}
.qa-q .qmark{flex:none;font-size:11px;letter-spacing:.08em;color:var(--stamp); border:1.5px solid var(--seal);border-radius:2px;padding:.16em .4em;transform:rotate(-4deg); background:rgba(138,90,43,.05);box-shadow:inset 0 0 0 1px rgba(138,90,43,.16);}
.qa-q .qmark::after{content:counter(qa,decimal-leading-zero)}
.qa-a{text-indent:1.7em}

.foot-kept{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:#93A9AB; margin:.75rem 0 0;padding-top:.6rem;border-top:1px solid rgba(255,255,255,.13);max-width:30ch;}

.art-eyebrow{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin:0 0 .5rem}
.art-eyebrow .kicker{margin:0}
.subj-stamp{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--stamp); border:1.5px solid var(--seal);border-radius:2px;padding:.14em .45em;transform:rotate(-3deg); background:rgba(138,90,43,.05);box-shadow:inset 0 0 0 1px rgba(138,90,43,.15);white-space:nowrap;}
.art-head{border-bottom:0;padding-bottom:1rem}
.art-head::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4px;border-top:2px solid var(--ink);border-bottom:1px solid var(--rule-2)}
figure.article-cover{max-width:min(100%,620px);margin:.1rem 0 1.8rem;padding:.5rem .5rem .55rem; transform:rotate(-.5deg);border-color:rgba(20,32,43,.16); box-shadow:0 1px 0 rgba(20,32,43,.1),0 3px 0 -1px rgba(20,32,43,.05),0 18px 30px -22px rgba(20,32,43,.85);}
.art-body p{margin-bottom:1.35em}
/* §编号由 CSS counter 出:正文 H2 里没有手写 .secno 也照样有号,和右栏科目索引对齐 */
.art-body{counter-reset:sec}
.art-body > h2{counter-increment:sec}
.art-body > h2 > .secno{display:none}
.art-body > h2::before{content:"§" counter(sec,decimal-leading-zero); font-family:var(--mono);font-size:12px;font-weight:500;color:var(--stamp);letter-spacing:.05em; margin-right:.55em;vertical-align:.16em;}

.art-body blockquote{margin:1.5rem 0;padding:.1rem 0 .1rem 1.05rem;border-left:3px solid var(--redpen); font-style:italic;color:var(--ink-2);position:relative;}
.art-body blockquote::before{content:"";position:absolute;left:5px;top:0;bottom:0;width:1px;background:rgba(194,40,31,.32)}
.art-body blockquote p:last-child{margin-bottom:0}
.data-table thead tr{border-top:1px solid var(--rule-2)}
.data-table th{border-bottom:3px double var(--ink)}
.data-table tbody tr:nth-child(even):not(.best) td{background:rgba(20,32,43,.023)}
.data-table tbody tr:last-child td{border-bottom:3px double var(--ink)}
/* 提示块角标:写手写了 .nh 就用它的字,没写就由 CSS 补一枚描边小章 */
.note-red,.note-green{position:relative;padding-top:1.45rem}
.note-red::before,.note-green::before,.note-red .nh,.note-green .nh{position:absolute;top:-.62rem;left:.8rem;display:inline-block;margin:0; font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;line-height:1.5; border:1.5px solid currentColor;border-radius:2px;padding:.1em .45em;transform:rotate(-1.5deg);}
.note-red::before{content:"注意";color:var(--redpen);background:var(--redpen-bg)}
.note-green::before{content:"省钱点";color:var(--ledger);background:var(--ledger-bg)}
.note-red:has(> .nh)::before,.note-green:has(> .nh)::before{content:none}
.note-red .nh{background:var(--redpen-bg)}
.note-green .nh{background:var(--ledger-bg)}
.toc-list li{padding:.28rem .2rem .28rem .5rem;margin-left:-.5rem;border-left:2px solid transparent}
.toc-list li.on{border-left-color:var(--redpen);background:rgba(194,40,31,.055)}
.toc-list li.on::before{color:var(--redpen)}
.toc-list li.on a{color:var(--ink);font-weight:500}
.side-seal{margin-left:auto}
.code-card .side-h{display:flex;align-items:center;gap:.5rem}
.rel-list{gap:0}
.rel-list li{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:.8rem;align-items:baseline; padding:.58rem .3rem;border-bottom:1px dotted var(--rule-2);transition:background .12s ease;}
.rel-list li:first-child{border-top:1px solid var(--rule-2)}
.rel-list li:hover{background:var(--ledger-bg)}

.rd-big::after{content:"";display:block;width:min(52%,208px);height:7px;margin-top:.14em; background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='46' height='7' viewBox='0 0 46 7'><path d='M0 5 C 7 1.6, 14 1.6, 23 4.6 S 39 7.4, 46 3.6' fill='none' stroke='%23E0574B' stroke-width='2' stroke-linecap='round'/></svg>"); background-size:46px 7px;background-repeat:repeat-x;background-position:0 100%;}
.seg{gap:.4rem;flex-wrap:wrap}
.seg button{border:1px solid var(--rule-2);border-radius:2px;background:var(--card); padding:.5rem .65rem .5rem 1.55rem;position:relative;text-align:left; transition:background .14s ease,color .14s ease,border-color .14s ease;}
.seg button + button{border-left:1px solid var(--rule-2)}
.seg button::before{content:"";position:absolute;left:.56rem;top:50%;margin-top:-4.5px;width:9px;height:9px; border-radius:50%;background:var(--paper-2);box-shadow:inset 0 0 0 1px rgba(20,32,43,.32);}
.seg button[aria-pressed="true"]{background:var(--ink);color:#F2F6F1;border-color:var(--ink)}
.seg button[aria-pressed="true"]::before{background:var(--ledger-2);box-shadow:inset 0 0 0 1px rgba(255,255,255,.7)}
.guide{border-left:3px solid var(--stamp)}
.guide > summary{color:var(--stamp);padding-left:1rem}
.guide > summary:hover{background:rgba(138,90,43,.05)}
.guide > summary::before{content:"";flex:none;width:0;height:0;border-left:7px solid currentColor; border-top:5px solid transparent;border-bottom:5px solid transparent;transition:transform .16s ease;}
.guide[open] > summary::before{transform:rotate(90deg)}
.guide > summary::after{content:"展开";font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--muted)}
.guide[open] > summary::after{content:"收起"}

.legal .updated{display:flex;align-items:center;gap:.65rem;flex-wrap:wrap}
.nf-stamp{display:inline-flex;flex-direction:column;align-items:center;gap:.14rem;margin:.1rem 0 1.1rem; font-family:var(--mono);font-size:19px;letter-spacing:.18em;color:var(--redpen); border:3px solid rgba(194,40,31,.8);border-radius:4px;padding:.5rem 1.05rem;transform:rotate(-8deg); background:rgba(194,40,31,.045);box-shadow:inset 0 0 0 1.5px rgba(194,40,31,.32);}
.nf-stamp small{font-size:10px;letter-spacing:.22em;color:rgba(194,40,31,.72)}

@media (min-width:1081px){
  .hero-seal{display:flex}
}
@media (min-width:901px){
  .qa::before{content:"";position:absolute;top:.4rem;bottom:.4rem;left:calc(50% - .5px);width:1px;background:var(--rule-2)}
  .art-body{padding-left:3.4rem}
  .art-body::before{left:2.5rem}
  .art-body > h2{position:relative}
  .art-body > h2::before{position:absolute;left:-3.4rem;top:.42em;width:2.2rem;margin:0;text-align:right;vertical-align:baseline}
  figure.article-cover{margin-left:3.4rem}
}
@media (max-width:640px){
  .data-table{box-shadow:inset -15px 0 13px -15px rgba(20,32,43,.35)}
  .tool-head .meta-row{gap:.55rem 1rem}
  .tool-head .meta-row .dot{display:none}
  /* 这一段必须重申 §13 的移动端压缩值:§16 在文件更后面,同特异性会赢 */
  .hero{padding:1.05rem 0 1.35rem}
  .hero::before{opacity:.3}
  .h1{font-size:clamp(1.42rem,1rem + 2.4vw,1.85rem);line-height:1.28;margin-bottom:.42rem}
  .hero .lede{font-size:12.9px;line-height:1.56;margin-bottom:.72rem;max-width:none}
  .kicker-ledger{display:none}
  .hero-sum{display:none}
  .stmt{--pad:.9rem;padding:1.15rem var(--pad) .8rem}
  .stmt-save{min-width:0}
  .stmt-save .ss-hi dd{font-size:17px}
  .copy-stamp{font-size:16px}
  .qa-a{text-indent:0}
  .rel-list li{grid-template-columns:auto minmax(0,1fr);gap:.6rem}
  .rel-list li .cat{grid-column:2}
  .art-head::after{border-top-width:2px}
}
@media (max-width:400px){
  .hero{padding:.7rem 0 .95rem}
  .h1{margin-bottom:.28rem}
  .hero .lede{margin-bottom:.48rem;font-size:12.4px;line-height:1.5}
  .stmt{--pad:.8rem;padding:1rem var(--pad) .7rem}
}

/* 阶段3修正:hero 纹理层压住了左栏文字 → 文字层提到纹理之上 */
.hero-grid,.hero-seal{position:relative;z-index:1}
.hero-seal{position:absolute}

/* withdraw-fee:表格区预留高度,取数完成后再显示,防 CLS(Lighthouse 移动端 CLS 0.152→) */
#tblwrap{max-height:640px;overflow:auto}
#state.state-loading{min-height:640px;display:flex;align-items:flex-start}
@media (max-width:640px){#tblwrap{max-height:560px}#state.state-loading{min-height:560px}}

/* 工具页 meta-row 的铜章在字体换入时换行导致 CLS(412px 实测 0.152)→ 移动端铜章固定独占一行 */
@media (max-width:720px){.tool-head .meta-row{flex-wrap:wrap}.tool-head .meta-row .stamp{flex-basis:100%;align-self:flex-start;margin-top:.35rem}}

/* ============ 17. 阶段 4 · 第二轮审计结构项(2026-08-24) ============ */

/* 17.1 触摸目标 ≥44px:靠 inline-flex 居中 + 内边距把命中区撑到 44,视觉块面不加重
   (.burger 的 display 必须在自己的 720 媒体查询里重申,否则会被 §13 的 display:block 顶回去) */
.btn-copy{display:inline-flex;align-items:center;justify-content:center;min-height:44px}
.code-card .btn-copy{display:flex;align-items:center;justify-content:center;min-height:44px;width:100%}
.chip{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.25rem .72rem}
.seg button{display:inline-flex;align-items:center;min-height:44px}
.guide > summary{min-height:44px}
.burger{min-height:44px;min-width:44px;padding:.3rem .55rem}
@media (max-width:720px){
  .burger{display:inline-flex;flex-direction:column;align-items:center;justify-content:center}
}

/* 17.2 移动端 hero 保留一条事实:只留第一格(费率),另两格收起;§16 的 .hero-sum{display:none} 在此撤销 */
/* 桌面:.hf-long 是句子里的一段,必须 inline —— §6 的 .hero-fact span{display:block} 会把它顶成独立一行 */
.hero-fact .hf-long{display:inline}
@media (max-width:640px){
  .hero-sum{display:flex;align-items:center;margin-top:.38rem;padding:.24rem 0 .2rem;
    border-top:1.5px solid var(--ink);border-bottom:0;max-width:none}
  .hero-sum-tag{display:none}
  .hero-facts{display:grid;grid-template-columns:minmax(0,1fr)}
  .hero-fact{padding:0;display:flex;align-items:baseline;gap:.4rem;border-left:0}
  .hero-fact + .hero-fact{display:none}
  .hero-fact b{font-size:14.5px;line-height:1.1}
  .hero-fact span{font-size:10.6px;line-height:1.34;margin-top:0}
  /* 选择器要压过 §6 的 .hero-fact span{display:block},否则这两段在移动端照样占行 */
  .hero-fact .hf-long{display:none}
  /* 给这条腾地方:hero 纵向间距再收一点,首屏三件套(大号数字/码+复制/脚注)仍要落在 740 内 */
  .hero{padding:.6rem 0 .95rem}
  .hero .lede{margin-bottom:.42rem}
  .hero-btns{margin-top:.45rem}
  .stmt-foot{font-size:10.6px;margin-top:.55rem;padding-top:.45rem}
}
@media (max-width:400px){
  .hero{padding:.6rem 0 .9rem}
  .hero-fact span{font-size:10.2px}
}

/* 17.3 withdraw-fee:页面里先有一张静态快照表,#state 就不需要再预留 640px 空高
   (预留逻辑本身保留:slippage / funding-rate 仍靠 #state.state-loading 撑高防 CLS) */
#state.state-loading.state-slim{min-height:0;display:block}
@media (max-width:640px){#state.state-loading.state-slim{min-height:0}}
/* 表格区是限高滚动框(防 CLS),给个下缘阴影暗示还能往下滚 */
#tblwrap{min-height:340px;box-shadow:inset 0 -20px 15px -17px rgba(20,32,43,.34)}
.tbl-src{display:flex;align-items:baseline;gap:.5rem;flex-wrap:wrap;margin:0 0 .5rem;
  font-family:var(--mono);font-size:11px;letter-spacing:.05em;color:var(--muted)}
.tbl-src b{font-weight:500;color:var(--stamp);letter-spacing:.1em;text-transform:uppercase}
.tbl-src.live b{color:var(--ledger)}

/* 17.4 首页 §01:一万 U 来回的账单拆解(窄表,不走 .data-table 的 660px 最小宽) */
.bill{width:100%;margin:.15rem 0 .7rem;font-size:13.6px;font-variant-numeric:tabular-nums}
.bill thead th{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);font-weight:400;text-align:left;padding:0 .1rem .28rem;border-bottom:1px solid var(--rule-2)}
.bill thead th.n{text-align:right}
.bill td{padding:.42rem .1rem;border-bottom:1px dotted var(--rule-2);vertical-align:baseline;line-height:1.5}
.bill td.n{font-family:var(--mono);text-align:right;width:1%;white-space:nowrap;padding-left:.8rem}
.bill .bill-sub td{border-bottom:1px solid var(--rule-2);font-weight:500}
.bill .bill-end td{border-bottom:3px double var(--ink);color:var(--ledger)}
.bill .bill-end td.n{font-size:16px;font-weight:500}
.bill-lede{font-size:13.4px}
.bill-note{font-size:12.4px;color:var(--ink-2);margin:0 0 .9rem;line-height:1.6}
.bill-note .fnote{margin-right:.1em}

/* 17.5 工具柜 §01:自然说明 + 两条用法示例(不再是四张同句式卡) */
.use-lede{font-size:14.4px;color:var(--ink-2);max-width:70ch;line-height:1.8}
.use-cases{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem;margin:1.2rem 0 1rem}
.use-case{background:var(--card);border:1px solid var(--rule-2);border-left:2px solid var(--stamp);
  border-radius:var(--r);padding:.9rem 1rem;box-shadow:var(--shadow-card)}
.use-case h3{font-size:14.5px;margin:0 0 .45rem;line-height:1.45}
.use-case .uc-no{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--stamp);
  text-transform:uppercase;display:block;margin-bottom:.35rem}
.use-case p{font-size:13.4px;color:var(--ink-2);line-height:1.72;margin:0}
.use-src{border-top:1px solid var(--rule);padding-top:.8rem;max-width:74ch}
@media (max-width:640px){
  .use-cases{grid-template-columns:1fr;gap:.8rem;margin:1rem 0 .9rem}
  .use-lede{font-size:13.8px}
}

/* 17.6 工具页表格标题(vip-tiers 的两张静态表各自带 caption) */
.data-table caption{text-align:left;font-family:var(--mono);font-size:11px;letter-spacing:.09em;
  text-transform:uppercase;color:var(--muted);padding:.65rem .7rem .3rem}

/* 17.7 其余可点元素也补到 44px 命中区(.btn 桌面本来就 44,移动端被 §13 压到 35 → 这里兜住) */
.btn{min-height:44px;justify-content:center}

/* 17.8 工具页 meta-row 的铜章:移动端独占一行(§16 的防 CLS 规则)时不要被拉成整行宽 */
@media (max-width:720px){.tool-head .meta-row .stamp{max-width:max-content}}