:root{
  --bg:#F6EDE4;--deep:#E8D8C8;--surface:#FFF8F2;--soft:#F0E4D6;--ink:#1A1612;
  --text:#2A241C;--muted:#5A5048;--aux:#7A7068;--orange:#E07030;--copper:#B06030;
  --line:rgba(26,22,18,.12);--focus:rgba(224,112,48,.50);--shadow:0 12px 28px rgba(26,22,18,.10);
}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;z-index:120;background:var(--surface);padding:8px 12px;border:1px solid var(--orange)}.skip-link:focus{top:8px}
.shell-inner{width:min(960px,calc(100% - 32px));margin:0 auto}.top-shell{position:fixed;inset:0 0 auto 0;z-index:80}.orange-edge{height:20px;background:var(--ink);color:var(--bg);font-size:12px}.edge-row{height:20px;display:flex;align-items:center;justify-content:space-between}.edge-brand{font-weight:700;letter-spacing:.06em;position:relative}.edge-brand:before,.text-button:before{content:"";position:absolute;left:50%;top:50%;width:44px;height:44px;transform:translate(-50%,-50%)}.text-button{position:relative;border:0;background:transparent;color:var(--bg);padding:0 4px;min-height:20px;cursor:pointer}.black-head{height:54px;background:var(--surface);border-bottom:1px solid var(--orange)}.head-row{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-link,.panel-brand,.footer-logo{display:inline-flex;align-items:center;min-height:44px}.logo-img{height:24px;width:auto;max-width:140px;object-fit:contain}.logo-fallback{font-weight:900;font-size:20px;color:var(--ink)}.logo-fallback.light{color:var(--bg)}.head-actions{display:flex;gap:8px;align-items:center}.app-link,.menu-button{height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:4px;font-size:14px}.app-link{border:1px solid var(--orange);background:var(--surface);color:var(--ink)}.menu-button{border:1px solid var(--ink);background:var(--ink);color:var(--surface);cursor:pointer}.orange-blocks{height:46px;background:var(--surface);border-bottom:1px solid var(--line)}.block-row{height:46px;display:flex;align-items:center;gap:26px}.mini-nav{display:inline-flex;align-items:center;gap:8px;min-height:44px}.mini-square{width:18px;height:18px;border:1px solid var(--ink);border-radius:2px;background:transparent}.mini-nav.is-current .mini-square{background:var(--orange);border-color:var(--orange)}
.site-main{padding-top:120px;padding-bottom:40px}.content-wrap{width:min(960px,calc(100% - 32px));margin:0 auto}.hero-pad{padding:44px 0 24px}.eyebrow{font-size:13px;color:var(--copper);font-weight:700;letter-spacing:.08em;margin:0 0 8px}.index-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.index-chips span{display:inline-flex;min-height:32px;align-items:center;padding:0 10px;background:var(--orange);color:var(--surface);border-radius:3px;font-size:13px}.index-chips a{display:inline-flex;min-height:32px;align-items:center;padding:0 10px;background:var(--ink);color:var(--surface);border-radius:3px;font-size:13px}h1,h2,h3{color:var(--ink);margin-top:0}h1{font-size:24px;line-height:1.3;margin-bottom:14px}h2{font-size:20px;line-height:1.4;margin-bottom:12px}h3{font-size:16px;line-height:1.45;margin-bottom:8px}.lead{font-size:16px;max-width:780px;color:var(--muted);margin:0 0 18px}.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn-primary,.btn-secondary{height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:4px;font-size:14px;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#1A1612 0%,#E07030 100%);color:#FFF8F2}.btn-secondary{background:#FFF8F2;color:#1A1612;border:1px solid #E07030}.btn-primary:hover,.btn-secondary:hover,.app-link:hover,.menu-button:hover{transform:translateY(-1px)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.section{padding:30px 0;border-top:1px solid var(--line)}.section.alt{background:var(--soft)}.section.dark{background:var(--ink);color:var(--bg)}.section.dark h2,.section.dark h3{color:var(--surface)}.section.dark p{color:var(--bg)}.section-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:18px}.section-title p{margin:0;color:var(--muted);max-width:620px}.dark .section-title p{color:var(--deep)}.media-slot{background:var(--surface);border:1px solid var(--line);border-radius:4px;min-height:160px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain}.media-slot.narrow{height:176px;max-width:300px}.media-slot.tall{height:320px}.media-slot.banner{height:200px}.media-slot.icon-slot{width:48px;height:48px;min-height:48px;border-radius:6px}.media-slot.small{min-height:120px}
.slant-row{display:grid;grid-template-columns:minmax(0,300px) 1fr;gap:28px;align-items:center}.slant-media{clip-path:polygon(0 0,100% 0,88% 100%,0 100%)}.double-card{display:grid;grid-template-columns:1fr 1fr;gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:18px;box-shadow:var(--shadow)}.card p:last-child{margin-bottom:0}.roll-pages{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}.roll-page{background:var(--surface);border-left:4px solid var(--orange);border-radius:2px;padding:20px}.shelf-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.shelf-card{background:var(--deep);border:1px solid var(--line);padding:20px;border-radius:4px}.periods{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.period{background:var(--surface);border-top:4px solid var(--orange);padding:18px;border-radius:3px}.status-list{display:grid;gap:12px}.status-item{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:3px}.status-tag{font-weight:700;color:var(--copper)}.app-split{display:grid;grid-template-columns:minmax(220px,320px) 1fr;gap:30px;align-items:center}.app-id{display:flex;gap:12px;align-items:center;margin:14px 0}.app-id strong{display:block;color:var(--ink)}.app-id span{color:var(--muted);font-size:13px}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.feature-list div{background:var(--surface);border:1px solid var(--line);padding:14px;border-radius:3px}.note-box{padding:16px 18px;border-left:4px solid var(--orange);background:var(--surface)}
.page-head{padding:42px 0 24px}.page-head p{max-width:760px;color:var(--muted);margin-bottom:0}.text-block{background:var(--surface);border:1px solid var(--line);padding:22px;border-radius:4px;margin-bottom:16px}.text-block p{margin:0 0 12px}.text-block p:last-child{margin-bottom:0}.single-column{max-width:760px}.single-column .text-block{box-shadow:none}.memo-list{display:grid;gap:12px}.memo-item{background:var(--surface);border:1px solid var(--line);padding:16px 18px;border-radius:3px}.memo-item h2{font-size:18px}.method-flow{counter-reset:step;display:grid;gap:14px}.method-item{position:relative;padding:20px 20px 20px 64px;background:var(--surface);border:1px solid var(--line);border-radius:4px}.method-item:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:var(--orange);color:var(--surface);border-radius:3px;font-weight:700}.topic-list{display:grid;gap:14px}.topic-item{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:start;background:var(--surface);border:1px solid var(--line);padding:18px;border-radius:4px}.topic-label{font-weight:700;color:var(--copper)}.center-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:820px;margin:0 auto}.center-card{text-align:center;background:var(--surface);border:1px solid var(--line);padding:22px;border-radius:4px}.policy-stack{display:grid;gap:14px}.policy-item{background:var(--surface);border-top:3px solid var(--orange);padding:20px;border-radius:3px}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.help-card{background:var(--surface);border:1px solid var(--line);padding:18px;border-radius:4px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--surface);border:1px solid var(--line);padding:18px;border-radius:4px}.faq-item h2{font-size:17px}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.contact-card{background:var(--surface);border:1px solid var(--line);padding:20px;border-radius:4px}.about-hero{display:grid;gap:18px}.about-copy{max-width:800px}.legal-inline{font-size:13px;color:var(--aux)}
.site-footer{background:var(--ink);color:var(--bg);border-top:1px solid var(--orange);padding:34px 0 calc(28px + env(safe-area-inset-bottom));font-size:13px}.footer-inner{display:grid;gap:22px}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand div{display:flex;gap:8px;align-items:baseline}.footer-brand strong{font-size:16px;color:var(--surface)}.footer-brand span{color:var(--deep)}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-groups h2{font-size:14px;color:var(--surface);margin:0 0 8px}.footer-groups a{display:flex;align-items:center;color:var(--bg);min-height:44px}.footer-note,.copyright{margin:0;color:var(--deep)}
.overlay{position:fixed;inset:0;background:rgba(26,22,18,.46);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.menu-panel{position:fixed;z-index:100;top:28px;left:50%;transform:translate(-50%,-18px);width:320px;max-height:360px;overflow:auto;background:var(--surface);border:1px solid var(--orange);box-shadow:var(--shadow);padding:14px;opacity:0;visibility:hidden;pointer-events:none;transition:.18s;border-radius:4px}.menu-panel.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}.panel-head,.search-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid var(--line)}.panel-brand{gap:8px;font-weight:700}.close-button{border:1px solid var(--ink);background:var(--surface);color:var(--ink);height:36px;padding:0 12px;border-radius:3px;cursor:pointer}.menu-groups{display:grid;gap:12px;padding-top:10px}.menu-groups h2{font-size:13px;color:var(--copper);margin:0 0 6px}.menu-groups a{display:grid;grid-template-columns:72px 1fr;align-items:center;gap:8px;min-height:44px;padding:6px 0;border-bottom:1px solid var(--line)}.menu-groups a span{font-size:12px;color:var(--muted)}.search-panel{position:fixed;z-index:101;top:74px;left:50%;transform:translateX(-50%) translateY(-12px);width:min(760px,calc(100% - 32px));background:var(--surface);border:1px solid var(--orange);box-shadow:var(--shadow);padding:18px;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.search-panel.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}.search-inner label{display:block;margin:14px 0 6px;color:var(--muted)}.search-inner input{width:100%;height:44px;border:1px solid var(--line);background:var(--bg);color:var(--ink);padding:0 12px;border-radius:3px}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-links a{display:inline-flex;min-height:40px;align-items:center;padding:0 13px;background:var(--ink);color:var(--surface);border-radius:3px}.is-locked{overflow:hidden}.mobile-bottom{display:none}
@media (max-width:760px){
  .orange-blocks{display:none}.site-main{padding-top:74px;padding-bottom:72px}.shell-inner,.content-wrap{width:calc(100% - 32px)}.head-actions{gap:6px}.app-link,.menu-button{padding:0 10px}.double-card,.roll-pages,.shelf-grid,.periods,.feature-list,.center-cards,.help-grid,.contact-grid{grid-template-columns:1fr}.slant-row,.app-split,.topic-item{grid-template-columns:1fr}.slant-row{gap:18px}.media-slot.narrow{width:100%;max-width:none}.slant-media{clip-path:polygon(0 0,100% 0,94% 100%,0 100%)}.status-item{grid-template-columns:1fr;gap:6px}.page-head{padding-top:30px}.section{padding:24px 0}.footer-groups{grid-template-columns:1fr 1fr}.menu-panel{top:26px;width:88%;max-height:360px}.search-panel{top:0;left:0;transform:none;width:100%;height:100%;background:var(--ink);color:var(--surface);border:0;padding:18px;overflow:auto}.search-panel.is-visible{transform:none}.search-panel .search-head{border-color:rgba(255,248,242,.18)}.search-panel .search-head strong,.search-panel label{color:var(--surface)}.search-panel .close-button{background:transparent;color:var(--surface);border-color:var(--orange)}.search-panel input{background:#2a241c;color:var(--surface);border-color:rgba(255,248,242,.18)}.search-links a{background:var(--orange);color:var(--surface)}.mobile-bottom{position:fixed;z-index:75;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(--surface);border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}.mobile-bottom a.is-current{background:var(--orange);color:var(--ink);font-weight:700}.site-footer{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}