:root{--page:#f7f3eb;--ink:#10271f;--muted:#597066;--line:rgba(16,39,31,.16);--control:#fffdf8;--panel-family:#b8dfc5;--panel-tutor:#ead29b;--panel-school:#bccdd1;--family-light:#e8f5e9;--tutor-light:#fff7e5;--school-light:#edf4f5;--slant:clamp(32px,3.4vw,58px);--ease:cubic-bezier(.22,1,.36,1);color-scheme:light}@media(prefers-color-scheme:dark){:root[data-theme="system"]{--page:#101814;--ink:#e7eee9;--muted:#b6c3bb;--line:rgba(231,238,233,.16);--control:#17231e;--panel-family:#163e2e;--panel-tutor:#493c24;--panel-school:#273c42;--family-light:#25583e;--tutor-light:#73592c;--school-light:#45616a;color-scheme:dark}}:root[data-theme="dark"]{--page:#101814;--ink:#e7eee9;--muted:#b6c3bb;--line:rgba(231,238,233,.16);--control:#17231e;--panel-family:#163e2e;--panel-tutor:#493c24;--panel-school:#273c42;--family-light:#25583e;--tutor-light:#73592c;--school-light:#45616a;color-scheme:dark}*{box-sizing:border-box}html,body{background:var(--page)}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.brand-shell{min-height:100svh;display:flex;flex-direction:column;overflow:hidden}.brand-header{height:86px;padding:0 clamp(24px,4vw,66px);display:flex;align-items:center;justify-content:space-between;position:relative;z-index:20}.brand-mark{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.06em}.brand-mark img{width:38px;height:38px;border-radius:11px;box-shadow:0 7px 20px rgba(16,39,31,.12)}.brand-header nav{display:flex;align-items:center;gap:clamp(18px,2.5vw,42px);font-size:13px;font-weight:650;color:var(--muted)}.brand-header nav>a{transition:color .25s ease}.brand-header nav>a:hover{color:var(--ink)}.theme-menu{position:relative}.theme-menu summary{display:grid;place-items:center;width:31px;height:31px;list-style:none;border:1px solid var(--line);border-radius:50%;color:var(--ink);cursor:pointer}.theme-menu summary::-webkit-details-marker{display:none}.theme-menu summary:focus-visible,.theme-menu button:focus-visible{outline:3px solid rgba(22,169,107,.35);outline-offset:2px}.theme-options{position:absolute;right:0;top:40px;display:grid;gap:2px;width:112px;padding:5px;border:1px solid var(--line);background:var(--control);box-shadow:0 14px 34px rgba(9,28,20,.15)}.theme-options button{border:0;padding:8px 9px;background:transparent;color:var(--muted);font:inherit;font-size:12px;text-align:left;cursor:pointer}.theme-options button:hover,.theme-options button.is-active{background:color-mix(in srgb,var(--ink) 8%,transparent);color:var(--ink)}.product-stage{position:relative;display:flex;min-height:calc(100svh - 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@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}