:root{--bg:#F6EDE0;--deep:#EAD7C0;--white:#fff;--soft:#E8D2B4;--title:#3A2414;--text:#4A3220;--muted:#7A5634;--sub:#9A7450;--brand:#C4843C;--bright:#D9A05A;--dark:#8B5A2B;--cream:#FFF6EA;--border:rgba(196,132,60,.18);--border-strong:rgba(196,132,60,.46);--shadow:0 12px 28px rgba(58,36,20,.08);--radius:10px}
*{box-sizing:border-box}html{scroll-behavior:smooth}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}body.no-scroll{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit}img{max-width:100%;display:block;object-fit:contain;object-position:center}.shell{width:min(960px,calc(100% - 32px));margin:auto}.site-top{position:fixed;z-index:70;inset:0 0 auto 0}.ma-strip{height:20px;background:var(--dark);color:var(--cream);font-size:12px}.strip-inner,.brand-inner{display:flex;align-items:center;justify-content:space-between;height:100%}.top-action{border:0;background:transparent;color:var(--cream);min-width:44px;height:20px;cursor:pointer}.brand-bar{height:54px;background:#fff;border-bottom:1px solid var(--border)}.brand-logo{height:24px;width:auto;object-fit:contain}.brand-home{display:flex;align-items:center;min-height:44px}.brand-name{font-size:16px;font-weight:800;color:var(--title)}.brand-actions{display:flex;gap:8px;align-items:center}.brand-actions a,.brand-actions button,.sheet-head button,.search-head button{min-height:44px;padding:0 14px;border-radius:999px;border:1px solid var(--border-strong);background:#fff;color:var(--title);cursor:pointer}.brand-actions a:first-child{background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--dark) 100%);color:var(--cream);border-color:transparent}.knot-nav{height:44px;background:var(--cream);border-bottom:1px solid var(--border)}.knot-inner{height:44px;display:flex;align-items:center;gap:10px}.knot-mark{width:18px;height:14px;border:2px solid var(--brand);border-radius:5px;display:inline-block}.knot-inner a{height:30px;display:flex;align-items:center;padding:0 12px;border:1px solid var(--border-strong);border-radius:8px;color:var(--title);font-size:13px}.knot-inner a.is-current{background:var(--brand);color:var(--cream)}.site-main{padding-top:138px;min-height:70vh;padding-bottom:40px}.page-head{padding:34px 0 14px}.eyebrow{margin:0 0 8px;color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.08em}.page-head h1,.hero h1{margin:0;color:var(--title);font-size:24px;line-height:1.3}.page-lead{max-width:760px;margin:12px 0 0;color:var(--muted)}h2{font-size:20px;line-height:1.4;color:var(--title)}h3{font-size:16px;line-height:1.45;color:var(--title)}p{margin:0 0 12px}.section{padding:22px 0}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.soft-card{background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:14px}.section-title h2{margin:0}.section-title a{font-size:13px;color:var(--dark);font-weight:700}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.btn{height:42px;min-width:44px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;font-size:14px;font-weight:800;border:1px solid var(--border-strong);background:#fff;color:var(--title)}.btn.primary{background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--dark) 100%);color:var(--cream);border-color:transparent}.btn:hover,.btn:focus-visible,.brand-actions a:hover,.brand-actions button:hover{transform:translateY(-1px);outline:none;box-shadow:0 8px 18px rgba(58,36,20,.12)}.media-slot{background:var(--cream);border:1px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain}.media-160{height:160px}.media-168{height:168px}.media-176{height:176px}.media-200{height:200px}.media-app{height:320px;width:240px;max-width:100%}.hero{padding:36px 0 20px}.hero-index{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--dark);font-weight:800;margin-bottom:12px}.hero-knot{width:18px;height:14px;border:2px solid var(--brand);border-radius:5px}.hero .tagline{font-size:20px;color:var(--title);font-weight:800;margin:12px 0}.hero .intro{max-width:760px}.knot-cut{display:grid;grid-template-columns:240px 1fr;gap:20px;align-items:stretch}.knot-shape{width:240px;height:176px;border-radius:38px 10px 38px 10px}.dual-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.dual-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px}.dual-card h3{margin:10px 0 8px}.page-pair{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}.feature-row{display:grid;grid-template-columns:1fr 1.25fr;gap:18px;align-items:center}.feature-row.reverse{grid-template-columns:1.25fr 1fr}.feature-copy h2{margin-top:0}.status-list,.note-list,.method-list,.album-list,.focus-list{display:grid;gap:12px}.status-item,.note-item,.method-item,.album-item,.focus-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px}.status-item{display:grid;grid-template-columns:120px 1fr;gap:14px}.status-pill{display:inline-flex;width:max-content;min-height:30px;align-items:center;padding:0 10px;border-radius:999px;background:var(--cream);border:1px solid var(--border-strong);color:var(--dark);font-weight:800;font-size:13px}.steps{counter-reset:steps;display:grid;gap:14px}.step{counter-increment:steps;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;position:relative;padding-left:58px}.step:before{content:counter(steps);position:absolute;left:18px;top:18px;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:var(--cream);font-weight:800}.terms{display:grid;gap:14px}.term{background:#fff;border-left:4px solid var(--brand);padding:18px;border-radius:0 var(--radius) var(--radius) 0}.term h2{margin:0 0 8px}.center-card{max-width:740px;margin:0 auto;text-align:center}.center-card .media-slot{margin:0 auto 16px}.app-wrap{display:grid;grid-template-columns:260px 1fr;gap:24px;align-items:start}.app-images{display:grid;gap:12px;justify-items:start}.icon-box{width:70px;height:70px}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px}.faq-item h2{font-size:16px;margin:0 0 8px}.home-faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.brand-story{background:var(--deep);border-radius:var(--radius);padding:22px}.about-banner{height:200px}.site-footer{background:var(--dark);color:var(--cream);font-size:13px;border-top:1px solid rgba(255,246,234,.35);padding:28px 0 76px}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}.footer-brand div{display:flex;gap:8px;align-items:baseline}.footer-brand span{opacity:.8}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-groups h2{color:var(--cream);font-size:13px;margin:0 0 8px}.footer-groups a{display:block;padding:4px 0;color:var(--cream);opacity:.9}.footer-note{border-top:1px solid rgba(255,246,234,.25);margin-top:20px;padding-top:16px}.copyright{opacity:.82}.bottom-sheet{position:fixed;z-index:95;left:0;right:0;bottom:0;visibility:hidden;pointer-events:none;transform:translateY(105%);transition:.24s ease}.bottom-sheet.is-open{visibility:visible;pointer-events:auto;transform:translateY(0)}.sheet-shell{background:#fff;border-top:1px solid var(--border-strong);box-shadow:0 -18px 40px rgba(58,36,20,.18);max-height:220px;overflow:auto;padding:14px 16px}.sheet-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.sheet-brand{display:flex;align-items:center;gap:10px;font-weight:800}.sheet-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.sheet-groups h2{font-size:13px;margin:0 0 6px}.sheet-links{display:flex;gap:8px;flex-wrap:wrap}.sheet-links a{border:1px solid var(--border);border-radius:8px;padding:8px 10px;background:var(--cream);min-width:120px}.sheet-links a.is-current{border-color:var(--brand)}.sheet-links strong{display:block;font-size:13px}.sheet-links span{display:block;font-size:11px;color:var(--muted);line-height:1.4}.search-panel{position:fixed;z-index:94;left:0;right:0;top:74px;visibility:hidden;pointer-events:none;transform:translateY(-10px);opacity:0;transition:.2s ease}.search-panel.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-box{width:min(720px,calc(100% - 32px));margin:auto;background:#fff;border:1px solid var(--border-strong);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.search-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.search-head p{font-size:13px;color:var(--muted);margin:4px 0 0}.search-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.search-presets a{min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:var(--cream)}.overlay{position:fixed;z-index:90;inset:0;background:rgba(58,36,20,.38);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-active{opacity:1;visibility:visible;pointer-events:auto}.mobile-nav{display:none}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.check-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px}.check-card h3{margin-top:0}.pill-row{display:flex;gap:8px;flex-wrap:wrap}.pill{border:1px solid var(--border-strong);background:var(--cream);padding:5px 9px;border-radius:999px;color:var(--dark);font-size:13px}.prose p{margin-bottom:14px}.prose h2{margin-top:22px}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.contact-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px}
@media(max-width:760px){.shell{width:calc(100% - 32px)}.knot-nav{display:none}.site-main{padding-top:74px;padding-bottom:76px}.page-head{padding-top:28px}.knot-cut,.dual-grid,.page-pair,.feature-row,.feature-row.reverse,.app-wrap,.home-faq,.check-grid,.contact-grid{grid-template-columns:1fr}.knot-shape{width:240px;max-width:100%}.footer-groups{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:84px}.mobile-nav{position:fixed;z-index:80;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-nav a{display:flex;align-items:center;justify-content:center;font-size:13px;min-height:48px}.mobile-nav a.is-current{background:var(--brand);color:var(--cream)}.bottom-sheet{z-index:95}.sheet-shell{max-height:68vh}.sheet-groups{grid-template-columns:1fr 1fr}.search-panel{top:0;bottom:0;background:var(--dark);padding:74px 16px 64px}.search-box{width:100%;height:100%;background:var(--dark);color:var(--cream);border:0;box-shadow:none;overflow:auto}.search-head strong,.search-head p{color:var(--cream)}.search-head button{background:var(--cream)}.search-presets a{background:transparent;color:var(--cream);border-color:rgba(255,246,234,.45)}.status-item{grid-template-columns:1fr}.brand-actions{gap:6px}.brand-actions a,.brand-actions button{padding:0 10px}.footer-brand div{flex-direction:column;gap:0;align-items:flex-start}}
@media(max-width:420px){.sheet-groups,.footer-groups{grid-template-columns:1fr}.sheet-links a{min-width:100%}.brand-actions a{font-size:13px}.brand-actions button{font-size:13px}}