:root{--bean:#F3E6C8;--bean-deep:#E4D2A8;--paper:#FFF8E8;--paper-2:#F7EDD4;--ink:#3A2A12;--text:#4A3418;--muted:#7A5A28;--soft:#A08048;--dark:#5A3C16;--shell:#8A5A22;--sprout:#6A7A38;--footer:#2E220E;--line:rgba(90,60,22,.16);--line-strong:rgba(90,60,22,.42);--shadow:0 12px 28px rgba(58,42,18,.08);--radius:10px;--max:1080px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bean);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}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}a,button{outline:none}a:focus-visible,button:focus-visible{outline:3px solid rgba(106,122,56,.38);outline-offset:2px}button{font:inherit}.skip-link{position:fixed;left:12px;top:-80px;z-index:999;background:var(--paper);padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.sprout-line{position:fixed;z-index:120;top:0;left:0;right:0;height:22px;background:var(--dark);color:var(--paper);font-size:12px}.top-inner,.pod-inner,.ridge-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.top-inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.plain-top-btn{border:0;background:transparent;color:var(--paper);height:22px;padding:0 6px;cursor:pointer}.pod-header{position:fixed;z-index:115;top:22px;left:0;right:0;height:56px;background:var(--bean);border-bottom:1px solid var(--line-strong)}.pod-inner{height:56px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand-link{justify-self:start;min-width:80px;height:44px;display:flex;align-items:center}.brand-logo{display:block;height:26px;max-width:150px;object-fit:contain}.brand-text{font-size:16px;font-weight:800;color:var(--ink)}.app-link{justify-self:center;min-height:44px;display:flex;align-items:center;padding:0 14px;color:var(--dark);font-weight:700}.pod-menu-btn{justify-self:end;min-width:64px;height:44px;border:1px solid var(--line-strong);background:var(--paper);color:var(--dark);border-radius:9px;cursor:pointer}.ridge-tabs{position:fixed;z-index:110;top:78px;left:0;right:0;height:38px;background:var(--paper);border-bottom:1px solid var(--line)}.ridge-inner{height:38px;display:flex;align-items:center;justify-content:space-between}.ridge-left,.ridge-right{display:flex;gap:8px}.ridge-link{height:30px;display:flex;align-items:center;padding:0 12px;border-radius:7px;font-size:13px;color:var(--muted)}.ridge-link:hover{background:var(--paper-2)}.ridge-link.is-current{background:var(--dark);color:var(--paper)}.site-main{padding-top:116px;min-height:65vh}.container{width:min(var(--max),calc(100% - 32px));margin:0 auto}.page-hero{padding:46px 0 28px}.eyebrow{margin:0 0 8px;color:var(--sprout);font-size:13px;font-weight:800;letter-spacing:.08em}.page-hero h1,.home-intro h1{margin:0;color:var(--ink);font-size:24px;line-height:1.3}.page-lead{max-width:760px;margin:14px 0 0;color:var(--text)}h2{font-size:20px;line-height:1.35;color:var(--ink);margin:0 0 12px}h3{font-size:16px;line-height:1.4;color:var(--ink);margin:0 0 8px}p{margin:0 0 14px}.section{padding:26px 0}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px}.section-head p{margin:0;max-width:620px;color:var(--muted)}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.soft-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius)}.media-slot{display:flex;align-items:center;justify-content:center;background:var(--paper-2);border:1px solid var(--line);border-radius:10px;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center;display:block}.media-banner{height:200px}.media-grid{height:140px}.media-wide{height:180px}.media-app{height:340px}.media-brand{height:220px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:9px;font-size:14px;font-weight:800;white-space:nowrap;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,#8A5A22 0%,#5A3C16 100%);color:var(--paper);box-shadow:var(--shadow)}.btn-secondary{background:var(--paper);border:1px solid var(--shell);color:var(--dark)}
.home-intro{padding:48px 0 24px}.home-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--sprout);font-weight:800;margin-bottom:10px}.home-kicker:before{content:"";width:24px;height:2px;background:var(--sprout)}.home-intro .tagline{font-size:20px;color:var(--dark);font-weight:800;margin:10px 0 8px}.home-intro .intro-copy{max-width:760px}.home-intro .btn{margin-top:6px}.banner-wrap{padding:8px 0 28px}.four-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.feature-cell{padding:14px}.feature-cell .media-slot{margin-bottom:12px}.feature-cell p{margin:0;color:var(--muted)}.longread{padding:22px}.longread .media-wide{margin-bottom:18px}.longread p strong{color:var(--shell)}.timeline{position:relative;padding-left:26px}.timeline:before{content:"";position:absolute;left:8px;top:10px;bottom:12px;width:1px;background:var(--line-strong)}.timeline-item{position:relative;padding:0 0 20px 18px}.timeline-item:before{content:"";position:absolute;left:-23px;top:8px;width:10px;height:10px;border-radius:50%;background:var(--sprout);box-shadow:0 0 0 4px var(--bean)}.timeline-item:last-child{padding-bottom:0}.timeline-item span{display:inline-block;font-size:12px;color:var(--sprout);font-weight:800;margin-bottom:4px}.split-notes,.app-pair,.two-column{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-pane{padding:20px}.note-pane ul,.plain-list{margin:0;padding-left:18px}.theme-bars{display:grid;gap:10px}.theme-bar{display:grid;grid-template-columns:minmax(120px,.32fr) 1fr auto;gap:16px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:14px 16px}.theme-bar strong{color:var(--ink)}.status{font-size:12px;font-weight:800;color:var(--dark);background:var(--bean-deep);padding:4px 8px;border-radius:99px;white-space:nowrap}.app-copy{padding:22px}.app-copy .icon-row{display:flex;align-items:center;gap:12px;margin-bottom:14px}.icon-slot{width:48px;height:48px;border-radius:10px;background:var(--bean-deep);display:flex;align-items:center;justify-content:center;overflow:hidden}.icon-slot img{width:48px;height:48px;object-fit:contain}.bullet-columns{columns:2;column-gap:30px}.bullet-columns p{break-inside:avoid;background:var(--paper);border-left:3px solid var(--sprout);padding:12px 14px;margin:0 0 12px;border-radius:0 8px 8px 0}.faq-mini{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.faq-mini article{padding:16px}.brand-story{padding:22px}.brand-story .media-brand{margin-bottom:18px}
.article-flow{max-width:820px}.article-flow section{margin:0 0 22px;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.article-flow section p:last-child{margin-bottom:0}.observe-index{display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start}.observe-menu{position:sticky;top:136px;padding:16px}.observe-menu a{display:block;padding:10px 12px;border-bottom:1px solid var(--line);color:var(--dark)}.observe-menu a:last-child{border-bottom:0}.observe-content section{padding:22px;margin-bottom:14px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.quad-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.quad-grid article{padding:20px}.memo-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.memo-column{padding:20px}.memo-column article{padding:14px 0;border-bottom:1px solid var(--line)}.memo-column article:last-child{border-bottom:0}.checklist{display:grid;gap:12px}.check-row{padding:18px 18px 18px 48px;position:relative;background:var(--paper);border:1px solid var(--line);border-radius:10px}.check-row:before{content:"✓";position:absolute;left:17px;top:17px;width:22px;height:22px;border-radius:50%;background:var(--bean-deep);color:var(--dark);display:flex;align-items:center;justify-content:center;font-weight:900}.method-steps{counter-reset:method}.method-step{counter-increment:method;display:grid;grid-template-columns:58px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}.method-step:before{content:counter(method,"一") ;width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--dark);color:var(--paper);font-weight:800}.topic-list{display:grid;gap:14px}.topic-list article{padding:18px 20px;background:var(--paper);border-left:4px solid var(--shell);border-radius:0 10px 10px 0}.legal-flow{display:grid;gap:14px}.legal-flow section{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.legal-flow h2{padding-bottom:10px;border-bottom:1px solid var(--line)}.help-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.help-grid article{padding:18px}.faq-list{display:grid;gap:12px}.faq-list details{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:0 18px}.faq-list summary{cursor:pointer;min-height:52px;display:flex;align-items:center;font-weight:800;color:var(--ink)}.faq-list details p{padding:0 0 16px;margin:0;color:var(--text)}.contact-stream{display:grid;gap:14px}.contact-stream article{display:grid;grid-template-columns:180px 1fr;gap:18px;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.contact-stream h2{margin:0}.callout{padding:18px 20px;background:var(--bean-deep);border:1px solid var(--line-strong);border-radius:10px}.small-note{font-size:13px;color:var(--muted)}
.site-footer{margin-top:40px;background:var(--footer);color:var(--bean);border-top:1px solid rgba(243,230,200,.28);font-size:13px}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto;padding:30px 0 20px}.footer-brand{display:grid;grid-template-columns:300px 1fr;gap:30px;padding-bottom:24px;border-bottom:1px solid rgba(243,230,200,.14)}.footer-logo-row{display:flex;align-items:center;gap:12px}.footer-logo{height:26px;max-width:140px;object-fit:contain}.footer-logo-row strong{display:block;font-size:16px}.footer-logo-row span{display:block;color:#D6C79D;font-size:11px;letter-spacing:.1em}.footer-brand p{margin:0;color:#D6C79D}.footer-nav-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:24px 0}.footer-nav-grid h2{font-size:13px;color:var(--paper);margin:0 0 8px}.footer-nav-grid a{display:block;color:#D6C79D;padding:3px 0}.footer-nav-grid a:hover{color:var(--paper)}.footer-bottom{display:flex;gap:18px;flex-wrap:wrap;padding-top:16px;border-top:1px solid rgba(243,230,200,.14);color:#CBB98E}.screen-mask{position:fixed;z-index:200;inset:0;background:rgba(46,34,14,.42);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-mask.is-open{opacity:1;visibility:visible}.pod-drawer{position:fixed;z-index:220;top:0;right:0;width:min(380px,88vw);height:100dvh;background:var(--paper);box-shadow:-16px 0 34px rgba(46,34,14,.18);transform:translateX(104%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s;overflow-y:auto}.pod-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;z-index:2;background:var(--paper);display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px;min-width:0}.drawer-brand img{height:26px;max-width:110px;object-fit:contain}.drawer-brand strong{display:block;color:var(--ink)}.drawer-brand small{display:block;color:var(--muted);font-size:10px}.icon-close{min-width:58px;height:44px;border:1px solid var(--line-strong);background:var(--paper-2);color:var(--dark);border-radius:9px;cursor:pointer}.drawer-groups{padding:10px 16px 24px}.drawer-groups section{padding:12px 0;border-bottom:1px solid var(--line)}.drawer-groups h2{font-size:13px;color:var(--sprout);margin-bottom:4px}.drawer-groups a{display:grid;grid-template-columns:84px 1fr;gap:8px;padding:9px 0}.drawer-groups strong{color:var(--ink)}.drawer-groups span{font-size:12px;color:var(--muted);line-height:1.5}.search-layer{position:fixed;z-index:215;top:78px;left:0;right:0;visibility:hidden;opacity:0;pointer-events:none;transition:.18s}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:14px auto;background:var(--paper);border:1px solid var(--line-strong);border-radius:12px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.search-head strong{font-size:18px;color:var(--ink)}.search-head p{margin:2px 0 0;color:var(--muted)}.search-presets{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.search-presets a{min-height:44px;display:flex;align-items:center;justify-content:center;background:var(--paper-2);border:1px solid var(--line);border-radius:8px;color:var(--dark);font-weight:800}.search-note{font-size:13px;color:var(--muted);margin:14px 0 0}.mobile-bottom{display:none}
@media(max-width:760px){.top-inner,.pod-inner,.container,.footer-inner{width:calc(100% - 32px)}.ridge-tabs{display:none}.site-main{padding-top:78px;padding-bottom:64px}.home-intro{padding-top:34px}.page-hero{padding-top:34px}.four-grid,.split-notes,.app-pair,.two-column,.quad-grid,.memo-grid,.help-grid{grid-template-columns:1fr}.observe-index{grid-template-columns:1fr}.observe-menu{position:static}.theme-bar{grid-template-columns:1fr;gap:6px}.status{justify-self:start}.faq-mini{grid-template-columns:1fr}.bullet-columns{columns:1}.footer-brand{grid-template-columns:1fr}.footer-nav-grid{grid-template-columns:repeat(2,1fr)}.contact-stream article{grid-template-columns:1fr;gap:8px}.mobile-bottom{position:fixed;z-index:150;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(5,1fr);background:var(--paper);border-top:1px solid var(--line-strong)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted)}.mobile-bottom a.is-current{background:var(--dark);color:var(--paper)}.pod-drawer{width:min(88vw,380px)}.search-layer{top:0;bottom:0;background:var(--dark)}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;background:var(--dark);color:var(--paper);padding:calc(24px + env(safe-area-inset-top)) 16px 24px;overflow-y:auto}.search-head strong{color:var(--paper)}.search-head p,.search-note{color:#EADDBD}.search-head .icon-close{background:transparent;color:var(--paper);border-color:rgba(255,248,232,.42)}.search-presets{grid-template-columns:repeat(2,1fr)}.search-presets a{background:#4A3418;border-color:rgba(255,248,232,.18);color:var(--paper)}.footer-bottom{padding-bottom:58px}}
@media(max-width:420px){.pod-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand-link{min-width:0}.brand-logo{max-width:108px}.app-link{padding:0 8px;font-size:13px}.pod-menu-btn{min-width:58px}.footer-nav-grid{grid-template-columns:1fr 1fr}.page-hero h1,.home-intro h1{font-size:24px}.section{padding:22px 0}}

.mt-18{margin-top:18px}.mt-20{margin-top:20px}.mt-22{margin-top:22px}