:root{--bg: #eef2f7;--panel: #ffffff;--line: #d9e1ef;--text: #12233d;--subtext: #8090a8;--nav: #14233d;--primary: #2f6cf6;--shadow: 0 8px 28px rgba(17, 35, 61, .08);--radius: 20px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg)}button,input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.app-shell{display:flex;min-height:100%}.app-shell__content{flex:1;min-width:0;padding:18px 18px 18px 0}.side-nav{width:78px;background:var(--nav);padding:18px 0;display:flex;flex-direction:column;align-items:center;gap:24px;position:sticky;top:0;height:100vh}.side-nav__brand{width:44px;height:44px;border-radius:14px;background:linear-gradient(180deg,#5ca3ff,#2f6cf6);color:#fff;font-size:28px;font-weight:800;display:grid;place-items:center}.side-nav__menu{display:flex;flex-direction:column;gap:12px}.side-nav__item,.side-nav__logout{width:44px;height:44px;border:0;border-radius:14px;background:transparent;color:#ffffffb8;display:grid;place-items:center;cursor:pointer;transition:.2s ease}.side-nav__item:hover,.side-nav__logout:hover,.side-nav__item--active{background:#5ca3ff2e;color:#fff}.side-nav__logout{margin-top:auto;margin-bottom:6px}.page{padding:12px 18px 18px}.page-header{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:4px 0 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