:root{--bg:#F6EDE0;--deep:#EAD7C0;--card:#FFFFFF;--soft:#E8D2B4;--title:#3A2414;--text:#4A3220;--muted:#7A5634;--faint:#9A7450;--brand:#C4843C;--bright:#D9A05A;--dark:#8B5A2B;--cream:#FFF6EA;--border:rgba(196,132,60,.18);--strong-border:rgba(196,132,60,.46);--shadow:0 12px 28px rgba(58,36,20,.08);--radius:10px;--max:960px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
a,button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%;object-fit:contain;object-position:center}
:focus-visible{outline:3px solid rgba(196,132,60,.48);outline-offset:3px}
.top-strip{position:fixed;z-index:60;left:0;right:0;top:0;height:20px;background:var(--dark);color:var(--cream);font-size:12px}
.top-strip-inner,.brand-bar-inner,.quick-nav-inner{width:min(var(--max),calc(100% - 32px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between}
.plain-button{border:0;background:transparent;color:inherit;min-height:20px;padding:0 8px}
.brand-bar{position:fixed;z-index:59;left:0;right:0;top:20px;height:54px;background:#fff;border-bottom:1px solid var(--border)}
.brand-link{display:flex;align-items:center;min-height:44px;min-width:44px}
.brand-logo,.footer-logo,.sheet-logo{height:24px;width:auto;max-width:180px;object-fit:contain}
.brand-text{font-weight:800;color:var(--title);font-size:16px}
.brand-actions{display:flex;align-items:center;gap:8px}
.header-app,.sheet-open{height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:0 14px}
.header-app{background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--dark) 100%);color:var(--cream);font-weight:700}
.sheet-open{border:1px solid var(--strong-border);background:#fff;color:var(--title)}
.quick-nav{position:fixed;z-index:58;left:0;right:0;top:74px;height:44px;background:var(--cream);border-bottom:1px solid var(--border)}
.quick-nav-inner{justify-content:flex-start;gap:18px}
.quick-knot{width:18px;height:14px;border:2px solid var(--brand);border-radius:50% 42% 50% 42%;transform:rotate(-7deg);background:transparent;flex:0 0 auto}
.quick-item{height:34px;display:inline-flex;align-items:center;padding:0 12px;border:1px solid var(--brand);border-radius:999px;color:var(--title);background:transparent}
.quick-item.is-current{background:var(--brand);color:var(--cream);border-color:var(--brand)}
.noscript-nav{margin:118px auto 0;width:min(var(--max),calc(100% - 32px));padding:10px;background:#fff;border:1px solid var(--border);display:flex;gap:12px;flex-wrap:wrap}
.site-main{width:min(var(--max),calc(100% - 32px));margin:0 auto;padding:148px 0 72px}
h1,h2,h3{margin:0;color:var(--title);line-height:1.3}
h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}
p{margin:0}
.lead{font-size:18px;color:var(--title);font-weight:700;margin-top:12px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--dark);font-size:13px;font-weight:700;margin-bottom:10px}
.eyebrow:before{content:"";width:18px;height:14px;border:2px solid var(--brand);border-radius:50% 42% 50% 42%;transform:rotate(-8deg)}
.page-intro{padding:26px;background:linear-gradient(180deg,#fff 0%,var(--cream) 100%);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.page-intro p{margin-top:14px}
.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{height:42px;min-width:112px;padding:0 18px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.btn-primary{background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--dark) 100%);color:var(--cream)}
.btn-secondary{background:#fff;border:1px solid var(--strong-border);color:var(--title)}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(58,36,20,.10)}
.section{margin-top:24px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:12px}
.section-head p{color:var(--muted);max-width:560px}
.image-slot{background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);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-168{height:168px}.slot-176{height:176px}.slot-200{height:200px}.slot-app{height:320px;width:240px;max-width:100%}
.home-index{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.home-index a{height:34px;padding:0 13px;display:inline-flex;align-items:center;border:1px solid var(--strong-border);border-radius:999px;background:#fff;color:var(--title)}
.knot-cut-home{display:grid;grid-template-columns:240px 1fr;gap:22px;align-items:center;background:#fff;border:1px solid var(--border);padding:20px;border-radius:var(--radius)}
.knot-cut-home .image-slot{width:240px;height:176px;border-radius:48% 52% 46% 54% / 58% 44% 56% 42%}
.wheat-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}.wheat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px}.wheat-card .image-slot{margin-bottom:14px}
.page-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}.page-card{background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.page-card .image-slot{margin-bottom:12px}
.single-feature{display:grid;grid-template-columns:1fr 280px;gap:20px;padding:20px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.compact-feature{display:grid;grid-template-columns:1fr 240px;gap:18px;padding:18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.status-inline{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.status-inline span{display:inline-flex;align-items:center;height:30px;padding:0 10px;border-radius:999px;background:var(--soft);color:var(--title);font-size:13px;font-weight:700}
.app-wrap-home{display:flex;gap:24px;align-items:flex-start;background:#fff;border:1px solid var(--border);padding:22px;border-radius:var(--radius)}
.app-visual{flex:0 0 240px}.app-icon{width:48px;height:48px;margin-bottom:10px}.app-copy{flex:1;min-width:0}.app-copy p{margin-top:12px}
.info-band{background:var(--deep);border:1px solid var(--border);padding:20px;border-radius:var(--radius)}
.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini article{background:#fff;border:1px solid var(--border);padding:16px;border-radius:var(--radius)}.faq-mini p{margin-top:8px;color:var(--muted)}
/* makan */
.split-wheat{display:grid;grid-template-columns:1.05fr .95fr;gap:20px}.split-wheat .column{display:flex;flex-direction:column;gap:16px}.story-panel{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px}.story-panel p+ p{margin-top:12px}.story-panel.accent{background:var(--cream)}
/* huajing */
.knot-cut-layout{display:grid;grid-template-columns:260px 1fr;gap:24px;align-items:start}.knot-cut-visual{position:sticky;top:138px}.knot-cut-visual .image-slot{width:240px;height:176px;border-radius:46% 54% 50% 50% / 55% 44% 56% 45%}.observation-list{display:flex;flex-direction:column;gap:14px}.observation-list article{background:#fff;border-left:5px solid var(--brand);padding:18px 20px;border-radius:0 var(--radius) var(--radius) 0;box-shadow:var(--shadow)}.observation-list p{margin-top:9px}
/* yingbian */
.page-stack{max-width:820px;margin:0 auto}.page-sheet{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-top:16px;position:relative}.page-sheet:nth-child(even){margin-left:34px}.page-sheet:nth-child(odd){margin-right:34px}.page-sheet p{margin-top:10px}.page-sheet .image-slot{margin:14px 0}
/* pianfang */
.studio-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:20px}.studio-step{background:#fff;border:1px solid var(--border);padding:16px;border-radius:var(--radius);min-height:190px}.studio-step strong{display:block;color:var(--dark);margin-bottom:8px}.studio-notes{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.studio-notes article{background:var(--cream);padding:18px;border-radius:var(--radius);border:1px solid var(--border)}
/* jiebang */
.attention-stream{display:flex;flex-direction:column;gap:12px}.attention-item{display:grid;grid-template-columns:132px 1fr;gap:18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px}.attention-tag{display:flex;align-items:center;justify-content:center;background:var(--soft);color:var(--title);font-weight:800;border-radius:var(--radius);min-height:86px}.attention-item p{margin-top:8px}
/* maili */
.status-rows{display:flex;flex-direction:column;gap:12px}.status-row{display:grid;grid-template-columns:118px 1fr;gap:18px;align-items:start;background:#fff;border:1px solid var(--border);padding:18px;border-radius:var(--radius)}.status-badge{height:36px;display:flex;align-items:center;justify-content:center;border-radius:999px;background:var(--brand);color:var(--cream);font-weight:800}.status-row:nth-child(2n) .status-badge{background:var(--dark)}.status-row p{margin-top:7px}
/* huajian */
.note-board{display:grid;grid-template-columns:1fr 1fr;gap:16px}.note-block{background:var(--cream);border:1px solid var(--strong-border);padding:20px;border-radius:var(--radius)}.note-block:nth-child(3){grid-column:1/-1}.note-block p{margin-top:8px}.note-list{margin:12px 0 0;padding-left:20px}.note-list li+li{margin-top:8px}
/* guanpian */
.method-ribbon{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.method-ribbon article{background:#fff;border:1px solid var(--border);padding:18px;border-radius:var(--radius)}.method-ribbon p{margin-top:8px}.method-long{margin-top:18px;background:var(--deep);padding:22px;border-radius:var(--radius);border:1px solid var(--border)}.method-long p+ p{margin-top:12px}
/* huace */
.album-list{display:flex;flex-direction:column;gap:14px}.album-row{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:grid;grid-template-columns:180px 1fr;gap:20px}.album-label{background:var(--cream);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--dark);font-weight:800;min-height:90px}.album-row p{margin-top:8px}
/* pianti */
.shelf-center{max-width:760px;margin:0 auto;text-align:center}.shelf-card{background:#fff;border:1px solid var(--strong-border);box-shadow:var(--shadow);border-radius:var(--radius);padding:26px;margin-top:16px}.shelf-card p{margin-top:12px;text-align:left}.shelf-topics{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:16px}.shelf-topics a{height:38px;padding:0 14px;border-radius:999px;background:var(--cream);border:1px solid var(--border);display:inline-flex;align-items:center}
/* app */
.app-wrap{display:flex;gap:28px;align-items:flex-start}.app-wrap .app-visual{order:0}.app-wrap .app-content{flex:1}.app-feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.app-feature-list article{background:#fff;border:1px solid var(--border);padding:16px;border-radius:var(--radius)}.app-feature-list p{margin-top:8px}
/* install */
.install-path{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.install-step{background:#fff;border:1px solid var(--border);padding:18px;border-radius:var(--radius)}.install-step span{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;background:var(--brand);color:var(--cream);border-radius:50%;font-weight:800;margin-bottom:10px}.install-detail{margin-top:18px;background:var(--cream);padding:20px;border:1px solid var(--border);border-radius:var(--radius)}
/* legal */
.legal-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.legal-section{background:#fff;border:1px solid var(--border);padding:20px;border-radius:var(--radius)}.legal-section p{margin-top:8px}.legal-section.wide{grid-column:1/-1}
.grade-ladder{display:flex;flex-direction:column;gap:12px}.grade-block{background:#fff;border:1px solid var(--border);padding:18px;border-radius:var(--radius);display:grid;grid-template-columns:150px 1fr;gap:18px}.grade-block strong{color:var(--dark)}
.privacy-flow{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.privacy-flow article{background:#fff;border-top:4px solid var(--brand);padding:18px;border-radius:var(--radius);box-shadow:var(--shadow)}.privacy-flow p{margin-top:8px}.privacy-wide{margin-top:16px;background:var(--cream);padding:20px;border-radius:var(--radius);border:1px solid var(--border)}
/* help */
.help-map{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.help-map a{background:#fff;border:1px solid var(--border);min-height:90px;padding:16px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;text-align:center;font-weight:800}.help-copy{margin-top:18px;column-count:2;column-gap:28px;background:var(--cream);padding:22px;border-radius:var(--radius);border:1px solid var(--border)}.help-copy section{break-inside:avoid;margin-bottom:18px}.help-copy p{margin-top:8px}
/* faq */
.faq-list{display:flex;flex-direction:column;gap:10px}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:0 18px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--title);padding:16px 0}.faq-list p{padding:0 0 18px;color:var(--text)}
/* contact */
.contact-paths{display:grid;grid-template-columns:1fr 1fr;gap:14px}.contact-card{background:#fff;border:1px solid var(--border);padding:20px;border-radius:var(--radius)}.contact-card p{margin-top:9px}.contact-note{margin-top:18px;background:var(--deep);padding:20px;border-radius:var(--radius);border:1px solid var(--border)}
/* about */
.about-banner{height:200px;width:100%;background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center}.about-banner img{width:100%;height:100%;object-fit:contain}.about-manifesto{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;margin-top:18px}.about-copy{background:#fff;border:1px solid var(--border);padding:22px;border-radius:var(--radius)}.about-copy p+ p{margin-top:12px}.about-cover{background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);min-height:240px;display:flex;align-items:center;justify-content:center}.about-cover img{max-height:260px;width:100%;object-fit:contain}.about-values{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}.about-values article{background:#fff;border:1px solid var(--border);padding:18px;border-radius:var(--radius)}.about-values p{margin-top:8px}
.site-footer{background:var(--dark);color:var(--cream);border-top:1px solid rgba(255,246,234,.32);padding:34px 0 74px}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:auto}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{font-size:12px;opacity:.88}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:24px}.footer-groups h2{font-size:13px;color:var(--cream);margin-bottom:8px}.footer-groups a{display:block;font-size:13px;color:var(--cream);opacity:.9;padding:3px 0}.footer-note,.copyright{font-size:13px;margin-top:22px;color:var(--cream);opacity:.9}.copyright{margin-top:8px}
.site-overlay{position:fixed;z-index:80;inset:0;background:rgba(58,36,20,.28);opacity:0;pointer-events:none;transition:opacity .18s}.site-overlay.is-visible{opacity:1;pointer-events:auto}.site-overlay[hidden]{display:none}
.site-sheet{position:fixed;z-index:90;left:0;right:0;bottom:0;width:100%;max-height:220px;background:#fff;border-top:1px solid var(--strong-border);box-shadow:0 -18px 44px rgba(58,36,20,.18);transform:translateY(104%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s}.site-sheet.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.sheet-head{height:48px;display:flex;align-items:center;justify-content:space-between;width:min(var(--max),calc(100% - 32px));margin:auto}.sheet-brand{display:flex;align-items:center;gap:10px}.sheet-close,.search-close{height:40px;border:1px solid var(--strong-border);background:#fff;border-radius:999px;color:var(--title);padding:0 14px}.sheet-groups{width:min(var(--max),calc(100% - 32px));margin:auto;display:grid;grid-template-columns:1.1fr 1.1fr .8fr 1.2fr;gap:16px;padding-bottom:14px}.sheet-groups h2{font-size:13px;color:var(--dark);margin-bottom:5px}.sheet-groups a{display:block;font-size:12px;padding:3px 0}.sheet-groups a strong{margin-right:6px}.sheet-groups a span{color:var(--muted)}
.search-layer{position:fixed;z-index:95;left:0;right:0;top:74px;visibility:hidden;pointer-events:none;transform:translateY(-12px);opacity:0;transition:.18s}.search-layer.is-open{visibility:visible;pointer-events:auto;transform:translateY(0);opacity:1}.search-card{width:min(720px,calc(100% - 32px));margin:auto;background:#fff;border:1px solid var(--strong-border);box-shadow:var(--shadow);padding:20px;border-radius:0 0 var(--radius) var(--radius)}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;height:44px;border:1px solid var(--strong-border);border-radius:var(--radius);padding:0 12px;background:var(--cream);color:var(--title)}.search-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.search-presets a{height:38px;padding:0 13px;border:1px solid var(--border);background:#fff;border-radius:999px;display:inline-flex;align-items:center}
.mobile-bottom{display:none}.modal-open{overflow:hidden}
@media (max-width:760px){
  .quick-nav{display:none}.site-main{padding-top:104px;padding-bottom:88px}.top-strip-inner,.brand-bar-inner,.site-main,.footer-inner{width:calc(100% - 32px)}
  .brand-actions{gap:5px}.header-app,.sheet-open{padding:0 10px;font-size:13px}.brand-logo{max-width:126px}
  .knot-cut-home,.single-feature,.compact-feature,.wheat-pair,.page-cards,.split-wheat,.knot-cut-layout,.studio-notes,.note-board,.legal-columns,.contact-paths,.about-manifesto{grid-template-columns:1fr}
  .knot-cut-home .image-slot{margin:auto}.single-feature .image-slot,.compact-feature .image-slot{order:-1}
  .app-wrap-home,.app-wrap{flex-direction:column}.app-visual{flex-basis:auto;margin:auto}.slot-app{width:min(240px,100%)}
  .faq-mini{grid-template-columns:1fr}.studio-flow{grid-template-columns:1fr 1fr}.method-ribbon{grid-template-columns:1fr 1fr}.privacy-flow{grid-template-columns:1fr}.about-values{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr 1fr}
  .knot-cut-visual{position:static}.page-sheet:nth-child(even),.page-sheet:nth-child(odd){margin-left:0;margin-right:0}.attention-item,.status-row,.grade-block,.album-row{grid-template-columns:1fr}.attention-tag,.album-label{min-height:56px}
  .install-path{grid-template-columns:1fr 1fr}.help-map{grid-template-columns:1fr 1fr}.help-copy{column-count:1}
  .site-sheet{max-height:68vh;overflow:auto}.sheet-groups{grid-template-columns:1fr 1fr;padding-bottom:26px}.sheet-groups a span{display:block;margin-left:0}
  .search-layer{top:0;bottom:0;background:var(--dark)}.search-card{width:100%;height:100%;border:0;border-radius:0;background:var(--dark);color:var(--cream);padding:22px 16px}.search-head strong,.search-card label{color:var(--cream)}.search-card input{background:var(--cream)}.search-presets a{background:var(--cream);color:var(--title)}.search-close{background:transparent;color:var(--cream);border-color:rgba(255,246,234,.6)}
  .mobile-bottom{position:fixed;z-index:70;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:#fff;border-top:1px solid var(--border)}.mobile-bottom a{height:48px;display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bottom a.is-current{background:var(--brand);color:var(--cream);font-weight:800}
  .site-footer{padding-bottom:82px}.slot-200{height:200px}
}
@media (max-width:460px){.studio-flow,.method-ribbon,.install-path,.help-map,.sheet-groups,.footer-groups{grid-template-columns:1fr}.sheet-groups{padding-bottom:30px}.site-sheet{max-height:68vh}.home-index a{flex:1 1 auto;justify-content:center}}