:root{color-scheme:light;--brand-ink:#1f2328;--brand-muted:#8a929d;--orange:#ff6a00;--bg:#fff8ef}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}svg{fill:none;stroke:currentColor;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #1677ff;outline-offset:3px}::selection{background:#ffd6b5;color:#1f2328}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-thumb{background:#c5cbd2;border-radius:8px}[hidden]{display:none!important}.brand-shell-bar{position:sticky;top:0;z-index:900;display:flex;align-items:center;justify-content:space-between;gap:10px;width:min(100%,520px);min-height:55px;margin:0 auto;padding:8px 12px;background:rgba(255,248,239,.9);border-bottom:1px solid rgba(255,106,0,.08);backdrop-filter:blur(14px);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}.brand-shell-home,.brand-shell-menu-button{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid rgba(31,35,40,.07);border-radius:14px;background:rgba(255,255,255,.86);color:#5e6672;box-shadow:0 8px 18px rgba(64,42,20,.06)}.brand-shell-bar svg{width:21px;height:21px;stroke-width:2.25}.brand-shell-current{min-width:0;text-align:center}.brand-shell-current strong{display:block;overflow:hidden;color:#1f2328;font-size:16px;font-weight:920;line-height:1.1;text-overflow:ellipsis;white-space:nowrap}.brand-shell-current>span{display:block;overflow:hidden;margin-top:3px;color:#8a929d;font-size:11px;font-weight:700;line-height:1.15;text-overflow:ellipsis;white-space:nowrap}.brand-shell-reset{width:auto;min-width:54px;padding:0 10px;font-size:14px;font-weight:850}.brand-shell-fab{position:fixed;right:max(18px,calc((100vw - 520px)/2 + 18px));bottom:calc(22px + env(safe-area-inset-bottom));z-index:1450;display:inline-flex;align-items:center;justify-content:center;width:58px;height:58px;border:1px solid rgba(20,184,130,.22);border-radius:50%;background:rgba(255,255,255,.94);color:#087f6c;box-shadow:0 14px 34px rgba(15,23,42,.16),0 0 0 7px rgba(20,184,130,.08);backdrop-filter:blur(14px)}.brand-shell-fab svg{width:29px;height:29px;stroke-width:2.35}.brand-page-coupon .brand-shell-fab{bottom:calc(96px + env(safe-area-inset-bottom))}.brand-page-assistant .brand-shell-fab{bottom:calc(92px + env(safe-area-inset-bottom))}.mt-tutorial-expanded .brand-shell-fab{display:none}.brand-shell-home:active,.brand-shell-menu-button:active,.brand-shell-fab:active{transform:scale(.985)}#site-menu{width:min(calc(100% - 28px),430px);max-height:calc(100svh - 48px);margin:auto;padding:0;border:0;border-radius:22px;color:#1f2328;background:#fff;box-shadow:0 22px 60px rgba(15,23,42,.22);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}#site-menu::backdrop{background:rgba(15,23,42,.4);backdrop-filter:blur(3px)}.brand-shell-panel{padding:12px;background:radial-gradient(circle at 0 0,rgba(255,106,0,.1),transparent 180px),#fff}.brand-shell-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:3px 3px 12px}.brand-shell-panel-head strong{font-size:17px;font-weight:920}.brand-shell-close{width:34px;height:34px;border:0;border-radius:50%;background:#f3f5f7;color:#667085;font-size:22px;line-height:1}.brand-shell-list{display:grid;gap:8px}.brand-shell-item{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:62px;padding:10px;border:1px solid rgba(31,35,40,.06);border-radius:16px;background:rgba(248,250,252,.72)}.brand-shell-item-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:14px;background:color-mix(in srgb,var(--accent) 11%,#fff);color:var(--accent)}.brand-shell-item-icon svg{width:22px;height:22px}.brand-shell-item-title{min-width:0}.brand-shell-item-title strong{display:block;color:#1f2328;font-size:15px;font-weight:880;line-height:1.2}.brand-shell-item-title>span{display:block;overflow:hidden;margin-top:4px;color:#8a929d;font-size:12px;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.brand-shell-arrow{color:var(--accent);font-size:22px;font-weight:900}.brand-page-nav .site-brand{width:86.375px;height:30px;opacity:0;vertical-align:middle}.brand-page-nav .site-notice{font-size:12px;text-align:center;color:#8a929d;margin:12px 3px;line-height:1.6}.brand-page-nav .primary .cta{background:linear-gradient(135deg,var(--accent),#ff9d35)}.brand-page-mt{background:radial-gradient(circle at 8% -4%,rgba(255,123,0,.18),transparent 210px),radial-gradient(circle at 100% 5%,rgba(255,216,151,.34),transparent 260px),linear-gradient(180deg,#fffaf4 0%,var(--bg) 100%)}.brand-page-mt .mt-page{padding-top:12px}.brand-page-mt .back-link{display:none}.preview-indicator{position:fixed;top:0;right:0;z-index:1500;background:#202833;color:#fff;border-radius:0 0 0 6px;padding:3px 7px;font:9px -apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif;pointer-events:none}.load-error{text-align:center;padding:80px 20px;font-family:system-ui,sans-serif}.load-error h1{font-size:22px}.load-error button{border:0;border-radius:10px;background:#ff6a00;color:#fff;padding:11px 25px}.loading{padding:80px 20px;text-align:center;color:#627087;font-family:system-ui,sans-serif}#toast{position:fixed;bottom:95px;left:50%;transform:translate(-50%,10px);z-index:10000;width:max-content;max-width:calc(100vw - 36px);padding:12px 18px;border-radius:12px;background:#252b34;color:#fff;box-shadow:0 8px 24px #0002;font:13px/1.6 -apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}#toast.visible{opacity:1;transform:translate(-50%,0)}.update-text{font-size:14px;line-height:1.8;color:#5c6470;margin:20px 0}.update-go{display:flex;justify-content:center;padding:12px;border-radius:9px;background:#1677ff;color:#fff}
@media(max-width:360px){.brand-shell-bar{min-height:50px;padding:7px 9px}.brand-shell-home,.brand-shell-menu-button{width:36px;height:36px;border-radius:13px}.brand-shell-reset{width:auto}.brand-shell-current strong{font-size:15px}.brand-shell-fab{right:14px;width:54px;height:54px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.brand-shell-spacer{display:block;width:38px;flex:none}
/* Public refinement: shared rhythm and controls, October 2026. */
:root{--ui-paper:#fffaf5;--ui-surface:#fff;--ui-ink:#30271f;--ui-muted:#756b60;--ui-line:#eee4d8;--ui-radius:16px;--ui-shadow:0 8px 24px rgba(80,53,22,.055);--ui-font:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif}
body.has-brand-shell{font-family:var(--ui-font);color:var(--ui-ink);background:var(--ui-paper);-webkit-font-smoothing:antialiased}
.has-brand-shell button,.has-brand-shell input,.has-brand-shell textarea{font-family:inherit}
.brand-shell-bar{width:min(100%,520px);min-height:64px;padding:10px 16px;background:var(--ui-paper);border-bottom:1px solid var(--ui-line);backdrop-filter:none}
.brand-shell-current strong{font-size:17px;line-height:1.4;font-weight:750;color:var(--ui-ink)}
.brand-shell-current>span{font-size:11px;font-weight:400;line-height:1.4;color:var(--ui-muted)}
.brand-shell-home,.brand-shell-menu-button{min-width:42px;height:42px;border:1px solid var(--ui-line);border-radius:13px;background:#fff;color:#655a50;box-shadow:none}
.brand-shell-reset{width:auto;padding:0 13px;font-size:12px;font-weight:600}
.brand-shell-fab{width:48px;height:48px;border:1px solid var(--ui-line);border-radius:16px;color:#8c4d20;background:#fff;box-shadow:0 6px 18px #50351612;right:max(18px,calc((100vw - 520px)/2 + 18px))}
.brand-shell-fab:before,.brand-shell-fab:after{display:none}.brand-shell-fab svg{width:22px;height:22px}
.brand-shell-panel{padding:18px;background:#fff}.brand-shell-panel-head{padding-bottom:18px}.brand-shell-item{border-radius:13px;background:#fffaf5;border:0;min-height:68px}.brand-shell-item-title>span{color:var(--ui-muted);font-weight:400;line-height:1.5}.brand-shell-item-icon{border-radius:12px}
.has-brand-shell :is(button,a,input,textarea,summary):focus-visible{outline:3px solid #a65622;outline-offset:3px}
.has-brand-shell ::selection{background:#ffdfb7;color:#402c17}.has-brand-shell input,.has-brand-shell textarea{caret-color:#a65622}
.has-brand-shell ::-webkit-scrollbar-thumb{background:#d8c7b5}.has-brand-shell ::-webkit-scrollbar-track{background:#fffaf5}
@media(hover:hover){.brand-shell-home:hover,.brand-shell-menu-button:hover,.brand-shell-fab:hover{background:#fff1e2;color:#8c4d20}.brand-shell-item:hover{background:#fff0de}}
@media(min-width:760px){body.has-brand-shell{background:#f4efe8}.brand-shell-bar{border-radius:0}.has-brand-shell .brand-shell-fab{bottom:24px}.brand-page-coupon .brand-shell-fab{bottom:112px}.brand-page-assistant .brand-shell-fab{bottom:100px}}
@media(prefers-reduced-motion:no-preference){.has-brand-shell #site-menu[open]{animation:menu-reveal .22s cubic-bezier(.16,1,.3,1)}@keyframes menu-reveal{from{transform:translateY(12px);opacity:.7}to{transform:translateY(0);opacity:1}}}