:root {
  --paper: #fffaf0;
  --ink: #151515;
  --muted: #605e58;
  --line: #151515;
  --brand: #f43f72;
  --accent: #5b54f0;
  --soft: #ffe4ec;
  --panel: #ffffff;
  --radius: 22px;
  --shadow: 7px 7px 0 var(--ink);
  --max: 1180px;
  --display: ui-sans-serif, "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: ui-sans-serif, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}
button, input, textarea { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
.icon { width: 21px; height: 21px; flex: 0 0 auto; }
.skip-link {
  position: fixed; left: 16px; top: -80px; z-index: 100;
  padding: 12px 18px; background: var(--ink); color: white;
}
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.shell { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 2px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(12px);
}
.header-inner {
  min-height: 74px; display: flex; align-items: center;
  justify-content: space-between; gap: 20px;
}
.brand-lockup { display: inline-flex; align-items: center; gap: 11px; font-weight: 900; letter-spacing: -.03em; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 2px solid var(--line); background: var(--brand); color: white;
}
.header-nav { display: flex; align-items: center; gap: 26px; font-size: 14px; font-weight: 800; }
.header-nav a { border-bottom: 2px solid transparent; }
.header-nav a:hover { border-color: currentColor; }
.mini-download {
  min-height: 44px; padding: 0 17px; border: 2px solid var(--line);
  background: var(--ink); color: white; font-weight: 900;
  display: inline-flex; align-items: center; gap: 8px;
}
.mini-download[disabled] { opacity: .72; cursor: not-allowed; }
.hero { padding: clamp(56px, 8vw, 110px) 0 72px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 20px; font-weight: 900; text-transform: uppercase;
  letter-spacing: .09em; font-size: 13px;
}
.eyebrow::before { content: ""; width: 30px; height: 3px; background: var(--brand); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--display); line-height: 1.08; }
h1 { margin-bottom: 24px; font-size: clamp(3.2rem, 7vw, 6.9rem); letter-spacing: -.075em; }
h2 { margin-bottom: 18px; font-size: clamp(2.1rem, 4vw, 4.2rem); letter-spacing: -.055em; }
h3 { margin-bottom: 12px; font-size: clamp(1.2rem, 2vw, 1.55rem); letter-spacing: -.025em; }
.lead { max-width: 700px; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.download-button {
  min-height: 60px; padding: 0 24px;
  display: inline-flex; align-items: center; justify-content: center; gap: 11px;
  border: 2px solid var(--line); border-radius: 999px;
  background: var(--brand); color: white; font-weight: 950;
  box-shadow: 5px 5px 0 var(--ink);
}
.download-button[disabled] { cursor: not-allowed; }
.download-button[disabled]:hover { transform: none; }
.download-note { color: var(--muted); font-size: 13px; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 17px; margin-top: 28px; }
.section { padding: 92px 0; border-top: 2px solid var(--line); }
.section-heading { max-width: 780px; margin-bottom: 38px; }
.section-kicker { color: var(--brand); font-size: 13px; font-weight: 950; letter-spacing: .12em; text-transform: uppercase; }
.card {
  border: 2px solid var(--line); border-radius: var(--radius);
  background: var(--panel); box-shadow: var(--shadow);
}
.tag-row { display: flex; flex-wrap: wrap; gap: 9px; }
.tag {
  display: inline-flex; align-items: center; min-height: 34px; padding: 5px 12px;
  border: 1.5px solid var(--line); border-radius: 999px;
  background: var(--panel); font-size: 13px; font-weight: 800;
}
.tag.brand { background: var(--soft); }
.rule-note {
  padding: 16px 18px; border-left: 5px solid var(--brand);
  background: color-mix(in srgb, var(--brand) 9%, white); font-size: 14px;
}
.cta-band {
  position: relative; overflow: hidden; padding: 52px;
  border: 2px solid var(--line); background: var(--ink); color: white;
}
.cta-band::after {
  content: ""; position: absolute; width: 210px; height: 210px; right: -60px; top: -80px;
  border-radius: 50%; background: var(--brand);
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { max-width: 820px; }
.cta-band .download-button { background: var(--brand); border-color: white; box-shadow: 5px 5px 0 white; }
.faq-list { display: grid; gap: 14px; }
.faq-list details { border-top: 2px solid var(--line); padding: 21px 0; }
.faq-list summary { cursor: pointer; list-style: none; font-weight: 900; font-size: 18px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; float: right; font-size: 24px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 800px; margin: 12px 0 0; color: var(--muted); }
.site-footer { padding: 44px 0 96px; border-top: 2px solid var(--line); font-size: 13px; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.mobile-dock { display: none; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .45s ease, transform .45s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (max-width: 800px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .header-nav { display: none; }
  .header-inner { min-height: 66px; }
  .mini-download { display: none; }
  .hero { padding: 48px 0 56px; }
  h1 { font-size: clamp(3rem, 15vw, 4.9rem); }
  .section { padding: 68px 0; }
  .cta-band { padding: 34px 24px; }
  .site-footer { padding-bottom: 120px; }
  .mobile-dock {
    position: fixed; z-index: 60; left: 12px; right: 12px; bottom: max(12px, env(safe-area-inset-bottom));
    min-height: 64px; padding: 8px 10px 8px 16px;
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    border: 2px solid var(--line); background: var(--paper); box-shadow: 5px 5px 0 var(--ink);
  }
  .mobile-dock strong { display: block; line-height: 1.1; }
  .mobile-dock small { color: var(--muted); }
  .mobile-dock .download-button { min-height: 46px; padding: 0 15px; box-shadow: none; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

:root{--paper:#fffbed;--brand:#efad15;--accent:#e94369;--soft:#fff1b9;--radius:0;--shadow:none;--display:"Songti SC","SimSun",serif;--max:1220px}
.library-header{background:#fffbed}.brand-mark{width:46px;border-radius:50%;background:var(--ink);font-size:12px}
.library-hero{padding-top:36px}.issue-line{display:flex;justify-content:space-between;gap:20px;padding:10px 0;border-top:2px solid var(--line);border-bottom:1px solid var(--line);font-size:11px;font-weight:900;letter-spacing:.14em}
.library-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;padding-top:70px}.library-hero h1{font-size:clamp(4.1rem,9vw,8.7rem);line-height:.84}.library-hero h1 span{font-family:var(--body);font-size:.64em;color:var(--brand);letter-spacing:-.09em}
.cover-composition{position:relative;min-height:620px}.visual-label{position:absolute;top:0;right:10px;writing-mode:vertical-rl;font-size:11px;font-weight:900;letter-spacing:.1em}.cover-card{position:absolute;border:2px solid var(--line)}
.cover-one{left:8%;top:40px;width:330px;height:470px;padding:28px;background:#f3b51b;box-shadow:12px 12px 0 #151515}.cover-one small{font:900 12px var(--body);letter-spacing:.16em}.cover-one strong{display:block;margin-top:40px;font-size:66px;line-height:.88;letter-spacing:.05em}.cover-one i{position:absolute;width:125px;height:125px;border:2px solid var(--line);border-radius:50%;right:22px;bottom:24px;background:#ffeeda}.cover-one i::before,.cover-one i::after{content:"";position:absolute;background:var(--ink)}.cover-one i::before{width:2px;height:100%;left:50%}.cover-one i::after{width:100%;height:2px;top:50%}
.cover-two{right:4%;bottom:15px;width:270px;height:335px;padding:24px;background:#e94369;color:#fff;transform:rotate(6deg);box-shadow:9px 9px 0 #151515}.cover-two span{display:inline-block;padding:4px 9px;border:1px solid #fff;font-size:10px;font-weight:900}.cover-two b{display:block;margin-top:30px;font:900 47px/1 var(--body);letter-spacing:-.06em}.cover-two small{position:absolute;bottom:22px;left:24px}
.page-tab{position:absolute;right:0;top:110px;width:64px;height:84px;display:grid;place-items:center;border:2px solid var(--line);background:#fff;font-weight:900;font-size:28px}.page-tab small{font-size:12px}
.index-section{background:#fff}.index-head{display:flex;justify-content:space-between;align-items:end;gap:30px}.search-box{width:min(100%,380px);height:58px;padding:0 17px;border:2px solid var(--line);display:flex;align-items:center;gap:12px;background:#fffbed}.search-box input{width:100%;border:0;outline:0;background:transparent}.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}
.search-status{margin:18px 0 8px;text-align:right;color:var(--muted);font-size:13px}.index-list{border-top:3px solid var(--line)}.index-item{display:grid;grid-template-columns:70px 1fr 120px;align-items:center;gap:20px;min-height:105px;padding:18px 0;border-bottom:1px solid var(--line)}.index-item[hidden]{display:none}.index-number{font:900 20px var(--body);color:var(--brand)}.index-item h3{margin:0;font-size:27px}.index-item p{margin:5px 0 0;color:var(--muted);font-size:13px}.index-type{font-size:12px;font-weight:900;text-align:right}
.method-section{background:#eee8dd}.method-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:100px}.method-title{position:sticky;top:120px;align-self:start}.method-title p{color:var(--muted)}.method-list{margin:0;padding:0;list-style:none;border-top:2px solid var(--line)}.method-list li{display:grid;grid-template-columns:74px 1fr;gap:25px;padding:30px 0;border-bottom:2px solid var(--line)}.method-list>li>span{font:900 38px var(--body);color:var(--brand)}.method-list p{margin:0;color:var(--muted)}
.review-section{background:#fffbed}.review-head{display:grid;grid-template-columns:.95fr 1fr;gap:60px;align-items:end;margin-bottom:36px}.review-head p{color:var(--muted);margin-bottom:0}.review-grid{display:grid;grid-template-columns:repeat(4,1fr);border:2px solid var(--line);background:#fff}.review-card{min-height:285px;padding:24px;border-right:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,#fff8dc 100%)}.review-card:last-child{border-right:0}.review-card span{display:inline-flex;margin-bottom:22px;padding:5px 10px;border:1.5px solid var(--line);font:900 11px var(--body);letter-spacing:.08em;background:var(--soft)}.review-card h3{font-size:24px}.review-card p{margin:0;color:var(--muted);font-size:14px}
.library-cta{display:grid;grid-template-columns:1fr auto;align-items:end;gap:40px;background:#151515}.library-cta::after{border-radius:0;transform:rotate(15deg);background:var(--brand)}
@media(max-width:850px){.library-grid{grid-template-columns:1fr}.cover-composition{min-height:560px}.index-head{align-items:stretch;flex-direction:column}.search-box{width:100%}.method-grid{grid-template-columns:1fr;gap:45px}.method-title{position:static}.review-head{grid-template-columns:1fr;gap:18px}.review-grid{grid-template-columns:repeat(2,1fr)}.review-card:nth-child(2n){border-right:0}.review-card:nth-child(-n+2){border-bottom:1px solid var(--line)}.library-cta{grid-template-columns:1fr}.issue-line span:nth-child(2){display:none}}
@media(max-width:520px){.cover-composition{min-height:450px}.cover-one{left:0;width:270px;height:400px}.cover-two{width:210px;height:270px}.cover-one strong{font-size:54px}.cover-two b{font-size:35px}.index-item{grid-template-columns:42px 1fr}.index-type{display:none}.review-grid{grid-template-columns:1fr}.review-card{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}.review-card:last-child{border-bottom:0}}