:root{
  --page:#F7F1D8;
  --deep:#E8DFA8;
  --paper:#FFF9E8;
  --soft:#F0E8C0;
  --ink:#16140C;
  --text:#2A2614;
  --muted:#5A5428;
  --aux:#7A7440;
  --yellow:#E8C430;
  --line:rgba(22,20,12,.12);
  --focus:rgba(232,196,48,.55);
  --shadow:0 12px 28px rgba(22,20,12,.10);
  --radius:14px;
  --max:960px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--page)}
body{margin:0;background:var(--page);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block;object-fit:contain;object-position:center}
.skip-link{position:fixed;left:16px;top:-80px;z-index:300;background:var(--yellow);color:var(--ink);padding:9px 14px;border-radius:10px;font-size:13px}
.skip-link:focus{top:8px}
.no-scroll{overflow:hidden}
.smart-edge{position:fixed;z-index:120;left:0;right:0;top:0;height:20px;background:var(--ink);color:var(--yellow);font-size:12px}
.smart-edge-inner,.smart-head-inner,.smart-grid-inner,.footer-inner,.site-main{width:min(calc(100% - 32px),var(--max));margin:0 auto}
.smart-edge-inner{height:20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.edge-search{min-width:52px;height:20px;border:0;background:transparent;color:var(--yellow);font-size:12px;padding:0 4px}
.smart-head{position:fixed;z-index:115;top:20px;left:0;right:0;height:54px;background:var(--paper);border-bottom:1px solid var(--line)}
.smart-head-inner{height:54px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand-link{display:flex;align-items:center;min-height:44px;min-width:92px}
.brand-logo,.footer-logo,.drawer-logo{height:24px;width:auto;max-width:150px;object-fit:contain}
.brand-text{font-size:16px;font-weight:800;color:var(--ink)}
.head-actions{display:flex;align-items:center;gap:8px}
.app-link,.drawer-toggle{height:44px;min-width:72px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;border:1px solid var(--ink);padding:0 14px;font-size:14px;white-space:nowrap}
.app-link{background:linear-gradient(135deg,#16140C 0%,#E8C430 100%);color:#16140C;font-weight:800}
.drawer-toggle{background:var(--paper);color:var(--ink)}
.smart-grid{position:fixed;z-index:110;top:74px;left:0;right:0;height:48px;background:var(--paper);border-bottom:1px solid var(--line)}
.smart-grid-inner{height:48px;display:flex;align-items:center;gap:10px}
.smart-grid-link{width:120px;height:28px;border-radius:12px;border:1px solid var(--ink);display:flex;align-items:center;justify-content:center;font-size:13px;background:var(--paper);color:var(--ink)}
.smart-grid-link.is-current{background:var(--ink);color:var(--yellow)}
.site-main{padding-top:150px;padding-bottom:64px;min-height:65vh}
h1,h2,h3{margin-top:0;color:var(--ink);letter-spacing:.01em}
h1{font-size:24px;line-height:1.3;margin-bottom:14px}
h2{font-size:20px;line-height:1.35;margin-bottom:12px}
h3{font-size:16px;line-height:1.45;margin-bottom:8px}
p{margin:0 0 14px}
.lead{font-size:16px;line-height:1.8;color:var(--text)}
.eyebrow{font-size:12px;color:var(--muted);font-weight:800;letter-spacing:.08em;margin-bottom:8px}
.muted{color:var(--muted)}
.aux{color:var(--aux)}
.page-section{margin:0 0 30px}
.top-gap{margin-top:40px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:14px}
.section-head p{margin:0;color:var(--muted);max-width:560px}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.btn-primary,.btn-secondary{height:42px;min-width:112px;padding:0 18px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:750;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,#16140C 0%,#E8C430 100%);color:#16140C;border:1px solid var(--ink)}
.btn-secondary{background:var(--paper);color:var(--ink);border:1px solid var(--ink)}
a:hover,.edge-search:hover,.drawer-toggle:hover,.drawer-close:hover,#closeSearch:hover{filter:brightness(.96)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

/* 首页 */
.home-intro{padding:24px 0 26px;border-bottom:1px solid var(--line)}
.home-index-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}
.home-index-pair a{min-height:76px;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:0 8px 22px rgba(22,20,12,.06)}
.home-index-pair b{display:block;color:var(--ink);margin-bottom:4px}.home-index-pair span{color:var(--muted);font-size:13px}
.parallel-feature{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.parallel-panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px;min-height:220px}
.parallel-panel.media-panel{display:grid;grid-template-rows:160px auto;gap:14px}
.image-slot{background:var(--paper);border:1px dashed rgba(22,20,12,.20);border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}
.slot-160{height:160px}.slot-200{height:200px}.slot-240{height:240px}.slot-app{height:320px;max-width:420px;margin:0 auto}.slot-icon{width:64px;height:64px;margin:0 auto 14px;border-radius:16px}
.stack-cards{display:grid;gap:12px;max-width:850px}
.stack-card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.stack-card:nth-child(2){margin-left:34px}.stack-card:nth-child(3){margin-left:68px}
.stack-card.has-media{display:grid;grid-template-columns:190px 1fr;gap:18px;align-items:center}
.fold-pair{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
.fold-card{background:var(--soft);border:1px solid var(--line);border-radius:16px 16px 6px 16px;padding:18px;min-height:230px;position:relative}
.fold-card:after{content:"";position:absolute;right:-1px;bottom:-1px;width:42px;height:42px;background:var(--page);clip-path:polygon(100% 0,0 100%,100% 100%)}
.explain-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.explain-card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}
.period-row{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:10px;align-items:stretch}
.period-item{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:16px}.period-item:nth-child(2){background:var(--deep)}
.status-list{display:grid;gap:10px}.status-item{display:grid;grid-template-columns:110px 1fr;gap:16px;background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:14px 16px;align-items:start}.status-tag{display:inline-flex;justify-content:center;align-items:center;height:30px;border-radius:999px;background:var(--ink);color:var(--yellow);font-size:13px;font-weight:750}
.app-center{text-align:center;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:24px}.app-center p{text-align:left;max-width:760px;margin:0 auto 16px}
.points-list{display:grid;gap:10px}.point-row{display:grid;grid-template-columns:160px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--line)}
.faq-six{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:16px}.faq-mini h3{margin-bottom:6px}
.brand-band{background:var(--ink);color:var(--page);border-radius:16px;padding:24px}.brand-band h2{color:var(--yellow)}.brand-band p{color:var(--page)}

/* 内页版式 */
.page-hero{margin-bottom:26px}.page-hero .lead{max-width:760px}.page-hero.compact{padding-bottom:18px;border-bottom:1px solid var(--line)}
.inner-stack{display:grid;gap:13px}.inner-stack article{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px}.inner-stack article:nth-child(even){margin-left:46px}.inner-stack article:first-child .image-slot{margin-bottom:16px}
.inner-parallel{display:grid;grid-template-columns:1fr 1fr;gap:14px}.inner-parallel article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.inner-parallel article.wide{grid-column:1/-1}.inner-parallel .image-slot{margin-bottom:14px}
.inner-fold{display:grid;gap:13px}.inner-fold article{background:var(--soft);border:1px solid var(--line);border-radius:16px 16px 8px 16px;padding:20px;position:relative}.inner-fold article:nth-child(even){margin-right:58px}.inner-fold article:nth-child(odd){margin-left:24px}.inner-fold article:after{content:"";position:absolute;right:-1px;bottom:-1px;width:36px;height:36px;background:var(--page);clip-path:polygon(100% 0,0 100%,100% 100%)}
.single-notes{max-width:780px;margin:0 auto}.single-notes article{padding:20px 0;border-bottom:1px solid var(--line)}.single-notes .image-slot{margin:0 0 18px}
.period-page{display:grid;grid-template-columns:.9fr 1.15fr .95fr;gap:12px}.period-page article{background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:18px}.period-page article:nth-child(2){transform:translateY(22px);background:var(--deep)}.period-page .image-slot{margin-bottom:14px}
.timeline-status{display:grid;gap:10px}.timeline-status article{display:grid;grid-template-columns:140px 1fr;gap:18px;background:var(--paper);border-left:6px solid var(--yellow);border-radius:0 14px 14px 0;padding:18px}.timeline-status .image-slot{grid-column:1/-1;margin-top:4px}
.memo-checks{display:grid;grid-template-columns:1fr 1fr;gap:14px}.memo-checks article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.memo-checks article:before{content:"✓";display:inline-flex;width:28px;height:28px;border-radius:50%;background:var(--ink);color:var(--yellow);align-items:center;justify-content:center;margin-bottom:10px;font-weight:800}.memo-checks article.media-note{grid-column:1/-1;display:grid;grid-template-columns:240px 1fr;gap:18px}.memo-checks article.media-note:before{display:none}
.method-flow{counter-reset:method;max-width:820px;margin:0 auto}.method-flow article{position:relative;margin:0 0 16px;padding:18px 18px 18px 72px;background:var(--paper);border:1px solid var(--line);border-radius:14px}.method-flow article:before{counter-increment:method;content:counter(method,decimal-leading-zero);position:absolute;left:18px;top:18px;width:38px;height:38px;border-radius:12px;background:var(--yellow);display:flex;align-items:center;justify-content:center;font-weight:900;color:var(--ink)}
.topic-list{display:grid;gap:12px}.topic-list article{display:grid;grid-template-columns:190px 1fr;gap:18px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:14px}.topic-list article:nth-child(even){grid-template-columns:1fr 190px}.topic-list article:nth-child(even) .topic-label{order:2}.topic-label{font-weight:900;color:var(--ink);background:var(--yellow);border-radius:12px;display:flex;align-items:center;justify-content:center;min-height:94px;text-align:center;padding:12px}
.center-cards{max-width:760px;margin:0 auto;display:grid;gap:14px}.center-cards article{text-align:center;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:22px}.center-cards article p{text-align:left}.center-cards .image-slot{margin-bottom:16px}
.app-page{max-width:800px;margin:0 auto}.app-visual{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:22px;text-align:center;margin-bottom:18px}.app-copy-top,.app-copy-bottom{text-align:left}.feature-strips{display:grid;gap:10px}.feature-strip{display:grid;grid-template-columns:180px 1fr;gap:16px;background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:16px}
.install-steps{display:grid;gap:14px}.install-step{display:grid;grid-template-columns:50px 1fr;gap:16px;align-items:start;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.step-no{width:46px;height:46px;border-radius:13px;background:var(--ink);color:var(--yellow);display:flex;align-items:center;justify-content:center;font-weight:900}
.terms{display:grid;gap:18px}.terms section{padding:0 0 18px;border-bottom:1px solid var(--line)}.terms section:nth-child(odd){padding-left:18px;border-left:4px solid var(--yellow)}
.help-matrix{display:grid;grid-template-columns:1fr 1fr;gap:14px}.help-matrix article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.help-matrix article:nth-child(3){grid-column:1/-1}
.faq-list{display:grid;gap:12px}.faq-list article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.faq-list h2{font-size:16px;margin-bottom:8px}
.contact-paths{display:grid;grid-template-columns:1fr 1fr;gap:14px}.contact-paths article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.contact-note{margin-top:18px;padding:18px;background:var(--deep);border-radius:14px}
.about-banner{height:200px;margin-bottom:20px}.about-manifest{display:grid;gap:16px}.about-manifest article{padding:18px 0;border-bottom:1px solid var(--line)}.about-brand-image{max-width:360px;margin:18px auto}

.site-footer{background:var(--ink);color:var(--page);border-top:1px solid var(--yellow);font-size:13px;padding:30px 0 calc(28px + env(safe-area-inset-bottom))}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:20px}.footer-brand strong{font-size:16px;color:var(--yellow)}.footer-brand span{color:var(--page)}
.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:20px}.footer-groups h2{font-size:13px;color:var(--yellow);margin-bottom:8px}.footer-groups a{display:block;color:var(--page);padding:3px 0}.footer-note{color:var(--page);border-top:1px solid rgba(232,196,48,.35);padding-top:16px}.footer-copy{color:var(--page);margin-bottom:0}
.drawer-mask{position:fixed;inset:0;z-index:180;background:rgba(22,20,12,.46);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s ease}.drawer-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}
.smart-drawer{position:fixed;z-index:190;right:14px;top:86px;width:32vw;min-width:320px;max-width:430px;max-height:calc(100vh - 110px);overflow:auto;background:var(--paper);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);transform:translateX(calc(100% + 30px));opacity:0;visibility:hidden;pointer-events:none;transition:transform .22s ease,opacity .22s ease,visibility .22s ease;padding:16px}.smart-drawer.is-open{transform:translateX(0);opacity:1;visibility:visible;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}.drawer-close,#closeSearch{min-height:44px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);border-radius:12px;padding:0 14px}.drawer-groups{display:grid;gap:14px}.drawer-groups h2{font-size:13px;margin:0 0 6px;color:var(--muted)}.drawer-groups section{border-top:1px solid var(--line);padding-top:10px}.drawer-groups a{display:grid;grid-template-columns:72px 1fr;gap:8px;padding:7px 4px;border-radius:10px}.drawer-groups a:hover{background:var(--soft)}.drawer-groups b{font-size:14px;color:var(--ink)}.drawer-groups span{font-size:12px;color:var(--muted)}
.search-layer{position:fixed;z-index:170;left:0;right:0;top:74px;visibility:hidden;opacity:0;pointer-events:none;background:rgba(22,20,12,.18);padding:12px 16px 18px;transition:opacity .18s ease,visibility .18s ease}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(100%,960px);margin:0 auto;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.search-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:10px}.search-top strong{color:var(--ink)}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;height:46px;border:1px solid var(--ink);border-radius:12px;background:var(--paper);color:var(--ink);padding:0 14px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:12px;display:inline-flex;align-items:center;background:var(--soft)}.search-empty{margin:12px 0 0;color:var(--muted)}
.mobile-bottom{display:none}

@media (max-width:760px){
  .smart-edge-inner,.smart-head-inner,.footer-inner,.site-main{width:calc(100% - 32px)}
  .smart-grid{display:none}
  .site-main{padding-top:98px;padding-bottom:86px}
  .smart-head{border-bottom:1px solid var(--ink)}
  .brand-link{min-width:70px}.brand-logo{max-width:118px}.head-actions{gap:6px}.app-link,.drawer-toggle{min-width:64px;padding:0 10px}
  .section-head{display:block}.section-head p{margin-top:6px}
  .home-index-pair,.parallel-feature,.fold-pair,.explain-pair,.faq-six,.inner-parallel,.memo-checks,.help-matrix,.contact-paths{grid-template-columns:1fr}
  .stack-card:nth-child(2),.stack-card:nth-child(3),.inner-stack article:nth-child(even),.inner-fold article:nth-child(even),.inner-fold article:nth-child(odd){margin-left:0;margin-right:0}
  .stack-card.has-media{grid-template-columns:1fr}.stack-card.has-media .image-slot{height:180px}
  .period-row,.period-page{grid-template-columns:1fr}.period-page article:nth-child(2){transform:none}
  .status-item,.timeline-status article,.point-row,.feature-strip{grid-template-columns:1fr}.status-tag{width:110px}
  .memo-checks article.media-note{grid-column:auto;grid-template-columns:1fr}.memo-checks article.media-note .image-slot{height:180px}
  .topic-list article,.topic-list article:nth-child(even){grid-template-columns:1fr}.topic-list article:nth-child(even) .topic-label{order:0}.topic-label{min-height:64px}
  .footer-groups{grid-template-columns:1fr 1fr}
  .smart-drawer{right:8px;top:80px;width:84vw;min-width:0;max-width:390px;max-height:calc(100vh - 142px)}
  .search-layer{inset:0;top:0;background:var(--ink);padding:82px 16px 70px}.search-card{background:var(--ink);color:var(--yellow);border-color:rgba(232,196,48,.55);box-shadow:none}.search-top strong,.search-card label,.search-empty{color:var(--yellow)}.search-card input{background:var(--paper);color:var(--ink)}.search-presets a{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}#closeSearch{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}
  .mobile-bottom{position:fixed;z-index:100;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:var(--ink);border-top:1px solid var(--yellow)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;color:var(--page);font-size:13px}.mobile-bottom a.is-current{background:var(--yellow);color:var(--ink);font-weight:800}
  .site-footer{padding-bottom:calc(78px + env(safe-area-inset-bottom))}
  .slot-app{height:300px}.about-banner{height:200px}
}
@media (max-width:390px){.app-link,.drawer-toggle{min-width:58px;padding:0 8px;font-size:13px}.footer-groups{grid-template-columns:1fr}.home-index-pair{gap:8px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}