:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#1b2333;background:#f4f7fb;font-family:MiSans,PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}body{background:linear-gradient(#eef5ff 0%,#f4f7fb 34% 100%);min-height:100vh;margin:0}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.page{max-width:520px;min-height:100vh;margin:0 auto;padding:18px 16px 96px}.topbar{justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.brand{flex-direction:column;gap:3px;display:flex}.brand small{color:#3b6ef5;font-weight:700}.brand h1{margin:0;font-size:24px}.card{background:#ffffffeb;border:1px solid #bcd4ffbf;border-radius:22px;padding:16px;box-shadow:0 16px 40px -24px #1f377959}.stack{flex-direction:column;gap:12px;display:flex}.grid2{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.pill{color:#2545bd;background:#eef5ff;border-radius:999px;align-items:center;padding:5px 10px;font-size:12px;display:inline-flex}.muted{color:#647089}.btn{color:#fff;cursor:pointer;background:#3b6ef5;border:0;border-radius:999px;padding:11px 16px;font-weight:700}.btn.secondary{color:#3a4560;background:#fff;border:1px solid #dbe8ff}.btn:disabled{cursor:not-allowed;background:#b8c1d4}.bottom-nav{background:#ffffffeb;border-radius:999px;grid-template-columns:repeat(2,1fr);gap:10px;width:min(488px,100vw - 32px);padding:10px;display:grid;position:fixed;bottom:16px;left:50%;transform:translate(-50%);box-shadow:0 14px 36px -20px #1f377973}.bottom-nav.three{grid-template-columns:repeat(3,1fr)}.bottom-nav.four{grid-template-columns:repeat(4,1fr)}.nav-link{text-align:center;color:#647089;border-radius:999px;padding:10px;font-size:14px}.nav-link.active{color:#fff;background:#3b6ef5}.question textarea{resize:vertical;border:1px solid #dbe8ff;border-radius:16px;outline:none;width:100%;min-height:90px;padding:12px}.notice{color:#2545bd;background:#eef5ff;border-radius:16px;padding:12px}