:root{
--bg:#F6EDE0;--deep:#EAD7C0;--card:#FFFFFF;--soft:#E8D2B4;
--title:#3A2414;--text:#4A3220;--muted:#7A5634;--faint:#9A7450;
--wheat:#C4843C;--bright:#D9A05A;--dark:#8B5A2B;--ivory:#FFF6EA;
--border:rgba(196,132,60,.18);--strong:rgba(196,132,60,.46);--shadow:0 12px 28px rgba(58,36,20,.08)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;overflow-x:hidden}
body.modal-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button{font:inherit}
img{display:block;max-width:100%;object-fit:contain;object-position:center}
.wrap{width:min(960px,calc(100% - 32px));margin:0 auto}
.top-strip{position:fixed;left:0;top:0;width:100%;height:20px;background:var(--dark);color:var(--ivory);z-index:90;font-size:12px}
.top-strip-inner{height:20px;display:flex;align-items:center;justify-content:space-between}
.bare-button{border:0;background:none;color:var(--ivory);padding:0 2px;cursor:pointer}
.brand-head{position:fixed;left:0;top:20px;width:100%;height:54px;background:#fff;border-bottom:1px solid var(--border);z-index:89}
.brand-row{height:54px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand-home{min-height:44px;display:flex;align-items:center}
.brand-logo,.seat-logo,.footer-logo{height:24px;width:auto}
.brand-text{font-size:16px;font-weight:800;color:var(--title)}
.brand-actions{display:flex;align-items:center;gap:8px;white-space:nowrap}
.head-link,.menu-button,.close-button{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--wheat);background:#fff;color:var(--title);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px}
.menu-button{background:linear-gradient(135deg,var(--bright) 0%,var(--wheat) 55%,var(--dark) 100%);color:var(--ivory);border-color:transparent}
.knot-nav{position:fixed;left:0;top:74px;width:100%;height:44px;background:var(--ivory);border-bottom:1px solid var(--border);z-index:88}
.knot-nav-inner{height:44px;display:flex;align-items:center;justify-content:center;gap:10px}
.knot-mark{width:18px;height:14px;border:1px solid var(--wheat);border-radius:6px 2px 6px 2px;transform:rotate(-6deg)}
.knot-link{min-height:34px;padding:0 12px;border:1px solid var(--wheat);border-radius:8px;display:flex;align-items:center;font-size:13px;color:var(--title);background:#fff}
.knot-link.is-active{background:var(--wheat);color:var(--ivory)}
.site-main{padding-top:142px;padding-bottom:50px;min-height:72vh}
.page{padding:22px 0}
.hero-copy{padding:8px 0 28px}
.knot-index{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.knot-index .knot-mark{background:var(--wheat)}
.knot-index a{min-height:40px;padding:0 14px;border:1px solid var(--wheat);border-radius:10px;display:flex;align-items:center;background:#fff;font-size:13px}
h1,h2,h3{color:var(--title);margin-top:0}
h1{font-size:24px;line-height:1.3;margin-bottom:12px}
h2{font-size:20px;line-height:1.4;margin-bottom:10px}
h3{font-size:16px;line-height:1.45;margin-bottom:7px}
p{margin:0 0 12px}
.lead{font-size:17px;font-weight:700;color:var(--title)}
.section{padding:24px 0;border-top:1px solid var(--border)}
.surface,.soft-surface{border:1px solid var(--border);border-radius:10px;padding:18px;box-shadow:var(--shadow)}
.surface{background:#fff}
.soft-surface{background:var(--ivory)}
.media-slot{background:var(--ivory);border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.media-slot img{width:100%;height:100%;object-fit:contain}
.media-176{height:176px}.media-168{height:168px}.media-160{height:160px}.media-200{height:200px}
.knot-media{width:240px;height:176px;border-radius:30px 10px 30px 10px}
.knot-cut{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:center}
.double-wheat{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.knot-pages{display:grid;grid-template-columns:1.08fr .92fr;gap:18px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{min-height:42px;padding:0 18px;border-radius:10px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;font-size:14px}
.btn-primary{background:linear-gradient(135deg,var(--bright) 0%,var(--wheat) 55%,var(--dark) 100%);color:var(--ivory)}
.btn-secondary{background:#fff;color:var(--title);border-color:var(--wheat)}
.compact-list,.status-list,.check-list,.album-list,.faq-list,.help-links{display:grid;gap:12px}
.compact-list>*,
.status-row,.check-list>*,
.album-list>*,.faq-item,.help-links a{background:#fff;border:1px solid var(--border);border-radius:10px;padding:14px}
.status-row{display:grid;grid-template-columns:104px 1fr;gap:14px}
.status-badge{min-height:34px;border-radius:8px;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--title)}
.center-card{max-width:720px;margin:0 auto;text-align:center;background:#fff;border:1px solid var(--strong);border-radius:14px;padding:26px;box-shadow:var(--shadow)}
.center-card p{text-align:left}
.article-long{max-width:820px}
.article-long p{margin-bottom:16px}
.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.method-grid article{background:#fff;border:1px solid var(--border);border-radius:10px;padding:16px}
.app-wrap{display:flex;gap:24px;align-items:flex-start}
.app-media{width:240px;min-width:240px;height:320px;background:var(--ivory);border:1px solid var(--border);border-radius:18px;padding:10px;display:flex;align-items:center;justify-content:center}
.app-media img{max-height:100%;max-width:100%}
.app-copy{flex:1}
.app-icon{width:48px;height:48px;border-radius:10px;margin-bottom:12px}
.brand-banner{height:200px;background:var(--ivory);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:22px}
.brand-banner img{width:100%;height:100%}
.brand-backup{height:180px;background:#fff;border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-top:18px}
.brand-backup img{width:100%;height:100%}
.home-faq{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.help-links a{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px}
.help-links span{color:var(--muted);font-size:13px}
.site-footer{background:var(--dark);color:var(--ivory);border-top:1px solid rgba(255,246,234,.5);padding:28px 0 70px;font-size:13px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.footer-brand strong{font-size:16px;color:#fff;display:block}
.footer-brand span{display:block;font-size:12px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.footer-grid h2{font-size:14px;color:#fff;margin-bottom:8px}
.footer-grid a{display:block;padding:3px 0}
.footer-note{margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18)}
.overlay{position:fixed;inset:0;background:rgba(58,36,20,.28);z-index:120;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
.seat-panel{position:fixed;left:0;right:0;bottom:0;width:100%;height:min(220px,48vh);background:#fff;z-index:130;transform:translateY(104%);visibility:hidden;pointer-events:none;transition:.24s ease;box-shadow:0 -16px 36px rgba(58,36,20,.15);border-top:1px solid var(--border)}
.seat-panel.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}
.seat-head{height:52px;display:flex;align-items:center;justify-content:space-between;padding:6px 18px;border-bottom:1px solid var(--border)}
.seat-brand{display:flex;align-items:center;gap:10px}
.seat-groups{display:grid;grid-template-columns:1.15fr 1.15fr .8fr 1.3fr;gap:12px;padding:10px 18px 16px;overflow:auto;max-height:168px}
.seat-groups h2{font-size:14px;margin-bottom:5px}
.seat-groups a{display:inline-block;margin-right:10px;padding:3px 0}
.seat-groups b{display:inline}
.seat-groups span{display:none}
.search-panel{position:fixed;top:74px;left:0;right:0;z-index:135;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}
.search-panel.is-open{visibility:visible;opacity:1;pointer-events:auto}
.search-card{width:min(960px,calc(100% - 32px));margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:0 0 12px 12px;box-shadow:var(--shadow);padding:18px}
.search-head{display:flex;align-items:center;justify-content:space-between;gap:18px}
.search-head p{margin:2px 0 0;color:var(--muted)}
.search-presets{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.search-presets a{min-height:40px;padding:0 14px;border:1px solid var(--wheat);border-radius:8px;display:flex;align-items:center}
.mobile-bottom{display:none}
a:hover{color:var(--dark)}
a:focus-visible,button:focus-visible{outline:3px solid rgba(196,132,60,.35);outline-offset:2px}
@media(max-width:760px){
    .knot-nav{display:none}
    .site-main{padding-top:98px;padding-bottom:76px}
    .head-link,.menu-button{padding:0 10px}
    .knot-cut,.double-wheat,.knot-pages,.method-grid{grid-template-columns:1fr}
    .knot-media{max-width:100%}
    .app-wrap{display:block}
    .app-media{width:240px;max-width:100%;margin:0 auto 18px}
    .home-faq{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr}
    .seat-panel{height:68vh;max-height:68vh}
    .seat-head{height:56px}
    .seat-groups{grid-template-columns:1fr 1fr;max-height:calc(68vh - 56px);padding:12px 16px 20px}
    .seat-groups a{display:block;margin:0 0 8px}
    .seat-groups b{display:block}
    .seat-groups span{display:block;color:var(--muted);font-size:12px}
    .search-panel{inset:0;background:var(--dark);padding:18px;display:flex;align-items:flex-start}
    .search-card{width:100%;margin:0;background:var(--dark);color:var(--ivory);border-color:rgba(255,246,234,.35);border-radius:12px}
    .search-head p{color:var(--ivory)}
    .search-presets a{color:var(--ivory);border-color:var(--ivory)}
    .search-panel .close-button{background:transparent;color:var(--ivory);border-color:var(--ivory)}
    .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:#fff;border-top:1px solid var(--border);z-index:100;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}
    .mobile-bottom a.is-active{background:var(--wheat);color:var(--ivory)}
    .status-row{grid-template-columns:88px 1fr}
}