:root{
  --bg:#F3E8D4;--deep:#E2D2B4;--panel:#FBF3E4;--soft:#EDE0C8;
  --title:#1A140A;--text:#2C2214;--muted:#5C4A30;--sub:#7C6844;
  --gold:#7A5A20;--copper:#B88838;--line:rgba(26,20,10,.12);--strong:rgba(122,90,32,.50);
  --shadow:0 12px 28px rgba(26,20,10,.10);--radius:10px;--max:960px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}.is-locked{overflow:hidden}
a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}
.site-header{position:fixed;inset:0 0 auto 0;z-index:70}.top-strip{height:20px;background:var(--title);color:var(--copper);font-size:12px}.top-strip__inner,.brand-bar__inner,.dot-nav__inner{max-width:var(--max);height:100%;margin:0 auto;display:flex;align-items:center;padding:0 16px}.top-strip__inner{justify-content:space-between}.text-button{border:0;background:transparent;color:var(--copper);min-height:20px;padding:0 2px}.text-button:focus-visible,.icon-button:focus-visible,.drawer-button:focus-visible,.app-link:focus-visible,a:focus-visible{outline:2px solid var(--copper);outline-offset:3px}
.brand-bar{height:54px;background:var(--panel);border-bottom:1px solid var(--strong)}.brand-bar__inner{justify-content:space-between}.brand-link{display:flex;align-items:center;min-width:44px;min-height:44px}.brand-logo,.drawer-logo,.footer-logo{height:24px;width:auto;object-fit:contain}.brand-text,.drawer-logo-text,.footer-logo-text{font-weight:800;font-size:20px;color:var(--title)}.brand-actions{display:flex;align-items:center;gap:8px}.app-link,.drawer-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:0 14px;font-size:14px}.app-link{color:var(--panel);background:linear-gradient(135deg,#1A140A 0%,#B88838 100%)}.drawer-button{border:1px solid var(--gold);background:var(--panel);color:var(--title)}
.dot-nav{height:42px;background:var(--panel);border-bottom:1px solid var(--line)}.dot-nav__inner{justify-content:flex-start;gap:34px}.dot-link{font-size:13px;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:44px;height:42px;line-height:1.15;color:var(--muted)}.dot{width:8px;height:8px;border-radius:50%;border:1px solid var(--title);margin-bottom:3px}.dot-link.is-active .dot{background:var(--copper);border-color:var(--copper)}.dot-link.is-active{color:var(--title);font-weight:700}
.site-main{padding-top:132px;min-height:70vh;padding-bottom:48px}.page-shell{max-width:var(--max);margin:0 auto;padding:28px 16px 44px}.eyebrow{font-size:12px;letter-spacing:.08em;color:var(--gold);font-weight:700;margin:0 0 8px}.page-title{font-size:24px;line-height:1.3;margin:0 0 12px;color:var(--title)}.lead{font-size:15px;max-width:760px;margin:0;color:var(--muted)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 10px}h3{font-size:16px;line-height:1.45;color:var(--title);margin:0 0 8px}p{margin:0 0 12px}.section{margin-top:30px}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:14px}.section-head p{color:var(--muted);margin:0;max-width:520px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.soft-card{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.dark-card{background:var(--title);color:var(--panel);border-radius:var(--radius);padding:20px}.dark-card h2,.dark-card h3{color:var(--copper)}.dark-card p{color:var(--bg)}.gold-card{background:var(--gold);color:var(--panel);border-radius:var(--radius);padding:18px}.gold-card h2,.gold-card h3{color:var(--panel)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{height:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:8px;font-size:14px;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#1A140A 0%,#B88838 100%);color:var(--panel)}.btn-secondary{background:var(--panel);border:1px solid var(--gold);color:var(--title)}.btn:hover{transform:translateY(-1px)}
.media-slot{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:120px}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-wide{height:168px}.media-medium{height:220px}.media-banner{height:200px}.media-app{height:320px}.media-icon{width:72px;height:72px;min-height:72px}.media-small{height:160px}
.home-index{display:flex;gap:22px;flex-wrap:wrap;margin-bottom:18px}.home-index a{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}.home-index i{display:block;width:8px;height:8px;border-radius:50%;background:var(--copper)}.home-intro{padding:24px 0 6px}.home-intro .lead{max-width:780px}.horizontal-cut{margin-top:28px}.horizontal-cut .copy{background:var(--soft);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--radius) var(--radius);padding:18px}.horizontal-cut .media-slot{border-radius:var(--radius) var(--radius) 0 0}.feature-trio{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:14px}.feature-trio article{min-width:0}.feature-trio .primary{background:var(--panel);border:1px solid var(--strong);border-radius:var(--radius);overflow:hidden}.feature-trio .primary .copy{padding:16px}.feature-trio .secondary{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.clip-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}.clip-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;position:relative}.clip-card:before{content:"";position:absolute;top:-6px;left:28px;width:44px;height:12px;background:var(--deep);border:1px solid var(--line);transform:rotate(-2deg)}.rack-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}.rack-cards .card:first-child{border-color:var(--strong)}.phase-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.status-list{display:grid;gap:10px}.status-item{display:grid;grid-template-columns:110px 1fr auto;gap:12px;align-items:center;background:var(--panel);border:1px solid var(--line);padding:14px 16px;border-radius:10px}.status-badge{font-size:13px;color:var(--gold);font-weight:700}.app-home{display:grid;grid-template-columns:300px 1fr;gap:22px;align-items:start}.app-visuals{display:grid;gap:10px;justify-items:center}.icon-row{display:flex;align-items:center;gap:12px}.faq-mini{display:grid;gap:10px}.faq-mini details{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px}.faq-mini summary{cursor:pointer;font-weight:700;color:var(--title)}.faq-mini p{margin-top:10px;color:var(--muted)}
.page-hero{padding:4px 0 6px}.three-column{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:14px}.three-column article{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.three-column article:first-child{grid-row:span 2}.three-column .media-slot{margin:-16px -16px 14px;border-radius:var(--radius) var(--radius) 0 0;border-left:0;border-right:0;border-top:0}.cut-stack{display:grid;gap:18px}.cut-row{display:grid;grid-template-columns:180px 1fr;gap:18px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:18px}.cut-row:nth-child(even){grid-template-columns:1fr 180px}.cut-row:nth-child(even) .cut-key{order:2}.cut-key{font-size:13px;color:var(--gold);font-weight:700}.paper-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px}.paper-sheet{background:var(--panel);border:1px solid var(--line);padding:20px;border-radius:8px;box-shadow:6px 8px 0 var(--deep)}.single-flow{max-width:760px;margin:0 auto}.single-flow .media-slot{margin:22px 0}.single-flow section{padding:18px 0;border-bottom:1px solid var(--line)}.thirds{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.thirds .soft-card:nth-child(2){transform:translateY(16px)}.thirds .soft-card:nth-child(3){transform:translateY(32px);margin-bottom:32px}.timeline{display:grid;gap:12px}.timeline article{display:grid;grid-template-columns:120px 1fr;gap:16px;background:var(--panel);border-left:4px solid var(--copper);padding:16px;border-radius:0 var(--radius) var(--radius) 0}.checklist{display:grid;gap:12px}.checklist article{display:grid;grid-template-columns:44px 1fr;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px}.check-mark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--title);color:var(--copper);font-weight:800}.method-grid{display:grid;grid-template-columns:160px 1fr;gap:18px}.method-nav{display:grid;gap:8px;align-content:start}.method-nav span{background:var(--deep);padding:12px;border-radius:8px;color:var(--title);font-weight:700}.method-copy{display:grid;gap:14px}.topic-list{display:grid;gap:12px}.topic-list article{display:grid;grid-template-columns:190px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--line)}.topic-list strong{color:var(--gold)}.center-cards{max-width:720px;margin:0 auto;display:grid;gap:16px}.center-cards article{text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px}.app-showcase{display:grid;grid-template-columns:1fr 1.25fr;gap:22px;align-items:start}.app-showcase .visual{display:grid;gap:12px;justify-items:center}.app-showcase .copy{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px}.install-steps{counter-reset:steps;display:grid;gap:14px}.install-steps article{counter-increment:steps;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 18px 18px 64px;position:relative}.install-steps article:before{content:counter(steps);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;background:var(--gold);color:var(--panel);display:grid;place-items:center;font-weight:700}.policy-stack{display:grid;gap:16px}.policy-stack section{background:var(--panel);border-left:4px solid var(--gold);padding:18px;border-radius:0 10px 10px 0}.grade-panels{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grade-panels section{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px}.privacy-map{display:grid;grid-template-columns:1fr 1fr;gap:14px}.privacy-map section:nth-child(1){grid-column:1/-1;background:var(--title);color:var(--panel)}.privacy-map section{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px}.privacy-map section:nth-child(1) h2{color:var(--copper)}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.help-grid article{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px}.faq-item h2{font-size:16px}.contact-stack{display:grid;gap:14px;max-width:760px}.contact-stack article{background:var(--panel);border:1px solid var(--line);padding:18px;border-radius:10px}.contact-stack .contact-note{background:var(--deep)}.about-layout{display:grid;gap:18px}.about-layout .brand-statement{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.about-layout .brand-statement .dark-card{align-self:stretch}.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.site-footer{background:var(--title);color:var(--bg);border-top:1px solid var(--copper);font-size:13px;padding:30px 0 calc(30px + env(safe-area-inset-bottom))}.footer-inner{max-width:var(--max);margin:0 auto;padding:0 16px}.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}.footer-brand strong{color:var(--copper);font-size:16px}.footer-brand span{color:var(--bg)}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-groups h2{font-size:13px;color:var(--copper);margin-bottom:8px}.footer-groups a{display:block;color:var(--bg);padding:3px 0}.footer-note{margin-top:22px;color:var(--bg);max-width:820px}.footer-copy{color:var(--sub);margin-bottom:0}
.page-mask{position:fixed;inset:0;background:rgba(26,20,10,.48);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.page-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}.site-drawer{position:fixed;left:16px;bottom:16px;width:240px;max-height:380px;background:var(--panel);z-index:90;border:1px solid var(--strong);border-radius:12px;box-shadow:var(--shadow);transform:translateY(120%);visibility:hidden;pointer-events:none;transition:.22s;display:flex;flex-direction:column}.site-drawer.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:8px}.icon-button{width:44px;height:44px;border:0;background:transparent;color:var(--title);font-size:24px}.drawer-scroll{overflow:auto;padding:8px 12px 14px}.drawer-scroll section{margin-bottom:12px}.drawer-scroll h2{font-size:13px;color:var(--gold);margin:8px 0}.drawer-scroll a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}.drawer-scroll b{display:block;font-size:14px}.drawer-scroll span{display:block;font-size:12px;color:var(--muted)}
.search-panel{position:fixed;left:0;right:0;top:74px;z-index:95;visibility:hidden;pointer-events:none;transform:translateY(-14px);opacity:0;transition:.2s}.search-panel.is-open{visibility:visible;pointer-events:auto;transform:translateY(0);opacity:1}.search-card{max-width:620px;margin:0 auto;background:var(--panel);border:1px solid var(--strong);border-radius:0 0 12px 12px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.search-head strong{font-size:18px;color:var(--title)}.search-head p{font-size:13px;color:var(--muted);margin:2px 0}.search-label{display:block;font-size:13px;color:var(--muted);margin:12px 0 6px}.search-input{width:100%;height:44px;border:1px solid var(--strong);border-radius:8px;background:var(--bg);color:var(--title);padding:0 12px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{min-height:40px;display:inline-flex;align-items:center;padding:0 12px;border:1px solid var(--gold);border-radius:8px;background:var(--panel)}.search-empty{margin:12px 0 0;color:var(--muted)}
.mobile-bottom{display:none}
@media (max-width:760px){
  .site-main{padding-top:74px;padding-bottom:72px}.dot-nav{display:none}.brand-bar__inner,.top-strip__inner{padding:0 16px}.app-link,.drawer-button{padding:0 11px}.page-shell{padding:22px 16px 38px}.page-title{font-size:24px}.feature-trio,.rack-cards,.phase-row,.app-home,.three-column,.paper-pair,.thirds,.app-showcase,.grade-panels,.privacy-map,.help-grid,.about-layout .brand-statement,.about-points{grid-template-columns:1fr}.three-column article:first-child{grid-row:auto}.cut-row,.cut-row:nth-child(even),.method-grid,.topic-list article,.status-item,.timeline article{grid-template-columns:1fr}.cut-row:nth-child(even) .cut-key{order:0}.thirds .soft-card:nth-child(2),.thirds .soft-card:nth-child(3){transform:none;margin-bottom:0}.app-home{gap:16px}.media-app{height:300px}.footer-groups{grid-template-columns:1fr 1fr}.site-drawer{left:6%;width:88%;bottom:64px;max-height:72vh}.search-panel{inset:0;top:0;background:var(--title);z-index:100;padding:14px;display:flex;align-items:flex-start}.search-card{width:100%;max-width:none;margin:0;background:var(--title);color:var(--bg);border:1px solid var(--copper);border-radius:12px}.search-head strong,.search-card .icon-button,.search-label{color:var(--copper)}.search-head p{color:var(--bg)}.search-input{background:var(--panel);color:var(--title)}.search-presets a{color:var(--title);background:var(--panel)}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--panel);border-top:1px solid var(--strong);z-index:75;display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--title)}.mobile-bottom a.is-active{background:var(--copper);color:var(--title);font-weight:700}.footer-inner{padding-bottom:48px}.media-banner{height:200px}.about-points{gap:10px}}
@media (max-width:420px){.brand-actions{gap:4px}.app-link,.drawer-button{font-size:13px;padding:0 9px}.footer-groups{grid-template-columns:1fr 1fr;gap:16px 12px}.page-shell{padding-left:16px;padding-right:16px}}