/* ============ tokens ============ */
:root{
  --paper:#FAF9F5;--surface:#FFFFFF;
  --ink:#17150F;--ink-2:#6B6558;--ink-3:#A9A290;
  --accent:#B5372A;            /* 每页覆盖:首页/发票=印泥红 */
  --accent-soft:rgba(181,55,42,.08);
  --rule:#E8E5DC;--rule-2:#D5D0C2;
  --sans:"Microsoft YaHei UI","Microsoft YaHei","PingFang SC","Noto Sans SC",sans-serif;
  --mono:"BTW Mono","Cascadia Code",Consolas,monospace;
  --shadow-paper:10px 12px 0 rgba(23,21,15,.07);
}
@font-face{font-family:"BTW Mono";src:url("fonts/JetBrainsMono-Regular.woff2") format("woff2");font-weight:400;font-display:swap;}
@font-face{font-family:"BTW Mono";src:url("fonts/JetBrainsMono-Bold.woff2") format("woff2");font-weight:700;font-display:swap;}
@font-face{font-family:"BTW Grotesk";src:url("fonts/SpaceGrotesk-Bold.woff2") format("woff2");font-weight:700;font-display:swap;}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15.5px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px;}
a{text-decoration:none;color:inherit;}
.mono{font-family:var(--mono);font-feature-settings:"tnum" 1;letter-spacing:-.01em;}

/* ============ atoms ============ */
.eyebrow{font-family:var(--mono);font-size:11.5px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);display:inline-flex;align-items:center;gap:10px;}
.eyebrow::before{content:"";width:24px;border-top:2px solid var(--accent);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;font-family:var(--sans);font-weight:700;font-size:15px;cursor:pointer;border:1.5px solid var(--ink);border-radius:3px;transition:transform .12s,box-shadow .12s,background .15s;}
.btn--fill{background:var(--ink);border-color:var(--ink);color:#fff;}
.btn--fill:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 rgba(23,21,15,.22);}
.btn--fill:active{transform:translate(1px,1px);box-shadow:none;}
.btn--line{background:var(--surface);color:var(--ink);border-color:var(--rule-2);}
.btn--line:hover{border-color:var(--ink);transform:translate(-1px,-1px);box-shadow:4px 4px 0 rgba(23,21,15,.12);}
.tag{font-family:var(--mono);font-size:10.5px;font-weight:700;padding:2px 9px;border:1px solid;border-radius:2px;letter-spacing:.04em;white-space:nowrap;vertical-align:2px;}
.tag--live{color:#2E6B57;border-color:#2E6B57;background:rgba(46,107,87,.07);}
.tag--soon{color:#B26A1B;border-color:#B26A1B;background:rgba(178,106,27,.07);}
.tag--plan{color:var(--ink-3);border-color:var(--rule-2);}

/* ============ nav / footer ============ */
nav{position:sticky;top:0;z-index:40;background:rgba(250,249,245,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{display:flex;align-items:center;gap:13px;}
.logo{position:relative;display:inline-block;line-height:1;font-family:"BTW Grotesk",var(--sans);font-weight:700;font-size:25px;letter-spacing:-1.2px;}
.logo .l-base{display:block;color:#8E97F0;}
.logo .l-ink{position:absolute;left:0;top:0;color:#0E1117;clip-path:inset(0 45% 0 0);}
.logo .l-trail{position:absolute;right:45%;top:-4px;bottom:-4px;width:30px;background:linear-gradient(90deg,transparent,rgba(255,46,46,.04) 55%,rgba(255,46,46,.24));pointer-events:none;}
.logo .l-beam{position:absolute;left:55%;top:-3px;bottom:-3px;width:1.6px;transform:translateX(-50%);background:#FF2E2E;box-shadow:0 0 6px rgba(255,46,46,.85);}
.brand .l-div{width:1px;height:26px;background:var(--rule-2);}
.brand .l-name{font-weight:900;font-size:16.5px;}
.brand .l-name em{font-style:normal;color:var(--accent);}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links>a{padding:8px 14px;font-size:14px;color:var(--ink-2);}
.nav-links>a:hover,.nav-links>a.on{color:var(--ink);}
.nav-cta{margin-left:18px;background:var(--surface);color:var(--accent);border:1.5px solid var(--accent);padding:8px 20px;font-weight:700;font-size:14px;border-radius:3px;transition:background .15s,color .15s;}
.nav-cta:hover{background:var(--accent);color:#fff;}
footer{border-top:1px solid var(--rule);background:var(--surface);padding:52px 0 30px;font-size:13.5px;color:var(--ink-2);}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;}
footer h5{font-size:14px;color:var(--ink);margin-bottom:12px;}
footer a{display:block;margin:7px 0;color:var(--ink-2);}footer a:hover{color:var(--ink);}
footer .bot{border-top:1px solid var(--rule);margin-top:32px;padding-top:18px;text-align:center;font-size:12px;color:var(--ink-3);}

/* ============ sections ============ */
.sec{padding:82px 0;}
.sec--alt{background:var(--surface);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);}
.sec-head{margin-bottom:46px;}
.sec-head.ctr{text-align:center;}
.sec-head.ctr .eyebrow{justify-content:center;}
.sec-title{font-weight:900;font-size:clamp(26px,3.2vw,36px);line-height:1.25;margin-top:14px;letter-spacing:-.01em;}
.sec-title .a{color:var(--accent);}
.sec-desc{color:var(--ink-2);max-width:620px;margin-top:12px;font-size:15px;}
.ctr .sec-desc{margin-left:auto;margin-right:auto;}

/* ============ card / table / faq ============ */
.card{background:var(--surface);border:1px solid var(--rule);border-radius:4px;padding:30px 26px;}
.card:hover{border-color:var(--rule-2);box-shadow:var(--shadow-paper);}
.tbl-wrap{overflow-x:auto;border:1px solid var(--rule);border-radius:4px;background:var(--surface);}
table.cmp{border-collapse:collapse;width:100%;font-size:13.5px;min-width:700px;}
table.cmp th,table.cmp td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--rule);border-right:1px solid var(--rule);vertical-align:top;}
table.cmp th:last-child,table.cmp td:last-child{border-right:0;}
table.cmp thead th{background:var(--ink);color:var(--paper);font-weight:700;font-size:13px;}
table.cmp thead th.me{background:var(--accent);}
table.cmp td.me{background:var(--accent-soft);font-weight:600;}
table.cmp tbody tr:last-child td{border-bottom:0;}
.ok{color:var(--accent);font-weight:700;}
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--ink);}
.qa{padding:22px 4px;border-bottom:1px solid var(--rule);}
.qa .q{font-weight:700;font-size:16px;display:flex;gap:12px;}
.qa .q .mk{color:var(--accent);font-family:var(--mono);}
.qa .a{color:var(--ink-2);font-size:14.5px;margin-top:8px;padding-left:27px;}

/* ============ 印章(每页一枚) ============ */
.stamp{width:84px;height:84px;border:3px solid;border-radius:50%;display:grid;place-items:center;text-align:center;font-weight:900;font-size:14px;line-height:1.35;transform:rotate(-11deg);color:var(--accent);border-color:var(--accent);opacity:.82;background:rgba(250,249,245,.65);mix-blend-mode:multiply;}

/* ============ 入场动画 ============ */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.rv.in{opacity:1;transform:none;}
.rv.d1{transition-delay:.08s;}.rv.d2{transition-delay:.16s;}.rv.d3{transition-delay:.24s;}
a:focus-visible,.btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px;}
@media(max-width:880px){
  .nav-links>a{display:none;}
  footer .cols{grid-template-columns:1fr;gap:24px;}
  .sec{padding:60px 0;}
}
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}