*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4EDE0;color:#2A2214;font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.site-head{position:fixed;z-index:80;top:0;left:0;right:0}.microbar{height:20px;background:#1C160C;color:#C49A3C;font-size:12px}.head-inner{width:min(960px,calc(100% - 32px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between}.plain-btn{border:0;background:transparent;color:#C49A3C;padding:0;cursor:pointer}.brandbar{height:54px;background:#FBF6EC;border-bottom:1px solid rgba(138,106,40,.35)}.brand-inner{gap:16px}.brand{display:flex;align-items:center;height:44px;font-size:16px;font-weight:800}.brand img,.footer-brand img,.sheet-brand img{display:block;max-width:170px;height:24px;object-fit:contain;object-position:left center}.head-actions{display:flex;align-items:center;gap:8px}.head-actions a,.head-actions button{height:40px;display:inline-flex;align-items:center;padding:0 14px;border:1px solid rgba(138,106,40,.5);background:#FBF6EC;color:#1C160C;cursor:pointer}.head-actions button{background:#1C160C;color:#F4EDE0}.quick-nav{height:44px;background:#F4EDE0;border-bottom:1px solid rgba(28,22,12,.12);display:flex;justify-content:center;align-items:center;gap:6px}.quick-nav a{min-width:118px;height:30px;display:flex;align-items:center;justify-content:center;border-left:3px solid #1C160C;font-size:13px}.quick-nav a.active{border-left-color:#C49A3C;background:#FBF6EC;font-weight:800}.site-main{padding-top:118px}.wrap{width:min(960px,calc(100% - 32px));margin:auto}.hero{padding:48px 0 28px;border-bottom:1px solid rgba(28,22,12,.12)}.eyebrow{font-size:12px;color:#8A6A28;letter-spacing:.12em}.hero h1{font-size:28px;line-height:1.3;margin:10px 0}.lead{font-size:16px;line-height:1.8;max-width:760px;margin:0}.btn{height:44px;display:inline-flex;align-items:center;padding:0 18px;margin-top:18px;background:linear-gradient(135deg,#1C160C 0%,#C49A3C 100%);color:#FBF6EC;font-size:14px}.btn:hover,.btn:focus-visible{outline:2px solid #8A6A28;outline-offset:2px}.section{margin:22px 0;padding:24px;background:#FBF6EC;border:1px solid rgba(28,22,12,.12);box-shadow:0 12px 28px rgba(28,22,12,.08)}.section h2{font-size:20px;margin:0 0 12px;color:#1C160C}.section h3{font-size:16px;margin:0 0 8px}.section p{font-size:15px;line-height:1.8;margin:8px 0}.image-slot{width:100%;background:#EDE3D0;display:flex;align-items:center;justify-content:center;overflow:hidden}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-176{height:176px}.slot-220{height:220px}.slot-app{height:320px}.about-banner{height:200px;margin-bottom:18px}.feature-strip{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}.feature-strip .copy{padding:6px 0}.story-stack{display:grid;gap:12px}.story-row{padding:18px;border-top:1px solid rgba(28,22,12,.12);background:#FFF9EF}.story-row:first-child{border-top:3px solid #8A6A28}.story-row .num{font-size:30px;color:#8A6A28;font-weight:800}.observer{display:grid;grid-template-columns:1fr 1fr;gap:18px}.observer article{padding:18px;border:1px solid rgba(138,106,40,.25)}.observer article:nth-child(2){transform:translateY(18px)}.topic-band{display:flex;gap:12px;overflow:hidden}.topic-band article{flex:1;padding:18px;background:#EDE3D0;min-width:0}.progress-list{display:grid;gap:10px}.progress-item{display:grid;grid-template-columns:110px 1fr;gap:14px;align-items:start;padding:14px 0;border-bottom:1px dashed rgba(28,22,12,.18)}.badge{display:inline-flex;justify-content:center;padding:6px 8px;background:#8A6A28;color:#FBF6EC;font-size:13px}.app-layout{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:center}.home-faq details,.faq-list details{border-top:1px solid rgba(28,22,12,.13);padding:13px 0}.home-faq summary,.faq-list summary{cursor:pointer;font-weight:800}.terms{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.term{padding:18px;background:#F4EDE0;border-left:3px solid #8A6A28}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.wide-left{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center}.folds{display:grid;gap:14px}.fold{padding:20px;border:1px solid rgba(138,106,40,.35);background:linear-gradient(110deg,#FBF6EC 0 78%,#EDE3D0 78%)}.center-card{max-width:680px;margin:22px auto;padding:30px;text-align:center;background:#FBF6EC;border-top:4px solid #8A6A28}.nav-sheet{position:fixed;z-index:100;right:18px;bottom:18px;width:360px;max-height:78vh;background:#FBF6EC;border:1px solid rgba(138,106,40,.5);box-shadow:0 24px 60px rgba(28,22,12,.25);visibility:hidden;pointer-events:none;transform:translateY(25px);opacity:0;transition:.2s}.nav-sheet.open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.sheet-head{height:56px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(28,22,12,.12)}.sheet-brand{display:flex;align-items:center;gap:10px}.sheet-head button,.search-head button{height:36px;padding:0 12px;border:1px solid rgba(28,22,12,.25);background:#FBF6EC;cursor:pointer}.sheet-scroll{max-height:calc(78vh - 56px);overflow:auto;padding:14px}.sheet-group h3{margin:12px 0 8px;font-size:13px;color:#8A6A28}.sheet-group a{display:grid;grid-template-columns:88px 1fr;gap:8px;padding:9px 0;border-bottom:1px dashed rgba(28,22,12,.13)}.sheet-group b{font-size:14px}.sheet-group span{font-size:12px;color:#5A4A30}.overlay{position:fixed;z-index:90;inset:0;background:rgba(28,22,12,.48);visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.overlay.open{visibility:visible;pointer-events:auto;opacity:1}.search-panel{position:fixed;z-index:105;top:74px;left:0;right:0;visibility:hidden;pointer-events:none}.search-panel.open{visibility:visible;pointer-events:auto}.search-card{width:min(720px,calc(100% - 32px));margin:auto;padding:22px;background:#FBF6EC;border:1px solid rgba(138,106,40,.5);box-shadow:0 22px 50px rgba(28,22,12,.2)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-placeholder{padding:13px 14px;margin:12px 0;background:#F4EDE0;border:1px solid rgba(28,22,12,.13);color:#7A6848}.search-links{display:flex;flex-wrap:wrap;gap:8px}.search-links a{padding:10px 13px;border:1px solid rgba(138,106,40,.45)}.site-footer{margin-top:50px;background:#1C160C;color:#F4EDE0;border-top:1px solid #C49A3C}.footer-inner{width:min(960px,calc(100% - 32px));margin:auto;padding:32px 0 80px}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand span{display:block;font-size:12px;color:#C49A3C}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:26px}.footer-grid h3{font-size:13px;color:#C49A3C}.footer-grid a{display:block;font-size:13px;padding:4px 0;color:#F4EDE0}.footer-note,.copyright{font-size:13px;line-height:1.7;color:#D7CDBD;margin-top:22px}.mobile-bottom{display:none}@media(max-width:720px){.quick-nav{display:none}.site-main{padding-top:74px}.head-inner{width:calc(100% - 32px)}.head-actions a,.head-actions button{padding:0 9px;font-size:13px}.brand img{max-width:120px}.hero{padding-top:34px}.hero h1{font-size:24px}.section{padding:18px}.feature-strip,.observer,.app-layout,.two-col,.wide-left,.terms{grid-template-columns:1fr}.observer article:nth-child(2){transform:none}.topic-band{flex-direction:column}.nav-sheet{left:6%;right:auto;bottom:62px;width:88%;max-height:74vh}.sheet-scroll{max-height:calc(74vh - 56px)}.search-panel{top:20px;bottom:0;background:#1C160C}.search-card{margin:28px auto;background:#1C160C;color:#C49A3C;border-color:#C49A3C}.search-placeholder{background:#2A2214;color:#F4EDE0}.search-links a{border-color:#C49A3C}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bottom{display:grid;position:fixed;z-index:70;bottom:0;left:0;right:0;grid-template-columns:repeat(4,1fr);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#FBF6EC;border-top:1px solid rgba(28,22,12,.18)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bottom a.active{background:#8A6A28;color:#FBF6EC}.footer-inner{padding-bottom:100px}}