@import "https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&display=swap";:root{--stp-font-sans:"Noto Sans SC", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;--stp-ink:#1c1917;--stp-ink-muted:#57534e;--stp-ink-subtle:#78716c;--stp-brand:#b91c1c;--stp-brand-deep:#991b1b;--stp-accent-teal:#0f766e;--stp-paper:#f7f4ef;--stp-paper-2:#efe9df;--stp-surface:#fff;--stp-surface-muted:#f4f1eb;--stp-border:#e7e2d9;--stp-border-strong:#d6cfc3;--stp-shadow-sm:0 1px 2px #1c19170f;--stp-shadow-matrix-wrap:0 1px 2px #1c19170d, 0 10px 32px #1c191712;--stp-shadow-md:0 8px 24px #1c191714;--stp-shadow-lg:0 16px 48px #1c19171f;--stp-radius-sm:10px;--stp-radius-md:14px;--stp-radius-lg:20px;--stp-bg-body:linear-gradient(165deg, #faf8f5 0%, #efe9df 42%, #f5f0ea 100%);--stp-matrix-header:#292524;--stp-matrix-header-edge:#ffffff1f;--stp-matrix-header-soft:#f4f1eb;--stp-row-mine:#e0f2fe;--stp-row-highlight:#fff7ed;--stp-ws-step-title-size:18px;--stp-ws-step-title-weight:700;--stp-ws-section-size:16px;--stp-ws-section-weight:600;--stp-ws-body-size:15px;--stp-ws-hint-size:14px;--stp-ws-micro-size:13px;--stp-ws-nano-size:12px;--stp-ws-table-size:15px;--stp-ws-table-dense:12px}@media (width<=480px){:root{--stp-ws-step-title-size:17px;--stp-ws-section-size:15px;--stp-ws-body-size:14px;--stp-ws-hint-size:13px;--stp-ws-micro-size:12px;--stp-ws-nano-size:11px;--stp-ws-table-size:14px;--stp-ws-table-dense:11px}}:root{--van-primary-color:var(--stp-brand);--van-success-color:#059669;--van-danger-color:#dc2626;--van-warning-color:#d97706;--van-text-color:var(--stp-ink);--van-text-color-2:var(--stp-ink-muted);--van-text-color-3:var(--stp-ink-subtle);--van-active-color:var(--stp-paper-2);--van-background:var(--stp-paper);--van-background-2:var(--stp-surface);--van-background-3:var(--stp-surface);--van-gray-1:var(--stp-paper);--van-gray-2:var(--stp-paper-2);--van-gray-3:var(--stp-border);--van-gray-8:var(--stp-ink);--van-base-font:var(--stp-font-sans)}html{-webkit-tap-highlight-color:transparent}body{font-family:var(--stp-font-sans);color:var(--stp-ink);background:var(--stp-bg-body);-webkit-font-smoothing:antialiased;touch-action:manipulation;background-attachment:fixed;margin:0;font-size:15px;line-height:1.5}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.page{box-sizing:border-box;min-height:100dvh}.van-nav-bar{-webkit-backdrop-filter:saturate(150%)blur(14px);border-bottom:1px solid var(--stp-border)!important;background:#ffffffe0!important}.van-nav-bar .van-nav-bar__title{letter-spacing:.03em;font-weight:600}.van-nav-bar .van-nav-bar__text{font-weight:500;color:var(--stp-brand)!important}.van-nav-bar .van-nav-bar__right{padding-right:max(12px, env(safe-area-inset-right,0px))}.stp-nav-logout{box-sizing:border-box;letter-spacing:.1em;min-width:56px;min-height:34px;color:var(--stp-brand);cursor:pointer;-webkit-tap-highlight-color:transparent;background:linear-gradient(165deg,#fffffffa 0%,#fcf9f4f5 100%);border:1px solid #b91c1c61;border-radius:999px;justify-content:center;align-items:center;margin:0;padding:8px 15px;font-family:inherit;font-size:13px;font-weight:600;transition:background .15s,border-color .15s,color .15s,transform .12s,box-shadow .15s;display:inline-flex;box-shadow:0 1px 2px #1c19170f,inset 0 1px #ffffffd9}.stp-nav-logout:hover{border-color:var(--stp-brand);color:var(--stp-brand-deep);box-shadow:0 2px 8px #b91c1c26,inset 0 1px #ffffffe6}.stp-nav-logout:active{border-color:var(--stp-brand);background:#b91c1c1a;transform:scale(.96)}.van-cell-group--inset{box-shadow:var(--stp-shadow-sm);border:1px solid var(--stp-border);overflow:hidden;border-radius:var(--stp-radius-md)!important}.van-cell-group__title{letter-spacing:.04em;font-weight:600;color:var(--stp-ink-muted)!important;padding-left:20px!important;padding-right:20px!important;font-size:13px!important}.van-button--primary.van-button--normal{box-shadow:0 2px 10px #b91c1c33}.van-tabs__nav{border-bottom:1px solid var(--stp-border)!important;background:#ffffffe6!important}.van-tabs__line{border-radius:2px;background:var(--stp-brand)!important}.van-tab--active{font-weight:600;color:var(--stp-brand)!important}.stp-login-hero{text-align:center;padding:28px 24px 8px}.stp-login-kicker{letter-spacing:.35em;text-transform:uppercase;color:var(--stp-brand);margin:0;font-size:13px;font-weight:700}.stp-login-title{color:var(--stp-ink);letter-spacing:.06em;margin:8px 0 0;font-size:26px;font-weight:700}.stp-login-sub{color:var(--stp-ink-muted);margin:10px 0 0;font-size:14px;line-height:1.5}.stp-login-card-wrap{padding-top:8px}.stp-card{background:var(--stp-surface);border-radius:var(--stp-radius-lg);border:1px solid var(--stp-border);box-shadow:var(--stp-shadow-md);margin:0 4px;padding:8px 0 20px}.stp-card .van-cell-group--inset{box-shadow:none;border:none;margin:0 12px!important}.stp-hint-footer{color:var(--stp-ink-subtle);background:var(--stp-surface-muted);border-radius:var(--stp-radius-sm);border:1px dashed var(--stp-border);margin:20px 20px 0;padding:14px 16px;font-size:12px;line-height:1.55}.stp-class-head{padding:20px 20px 8px}.stp-class-eyebrow{letter-spacing:.12em;color:var(--stp-brand);margin:0;font-size:12px;font-weight:600}.stp-class-title{color:var(--stp-ink);margin:6px 0 0;font-size:22px;font-weight:700}.stp-class-meta{color:var(--stp-ink-muted);margin:8px 0 0;font-size:13px}.stp-teacher-section-hint{color:var(--stp-ink-muted);margin:0;padding:0 16px 10px;font-size:12px;line-height:1.55}.stp-capsule-row{flex-wrap:wrap;align-items:center;gap:10px;padding:12px 16px 8px;display:flex}.stp-capsule-row .van-button--small{min-height:36px;padding:0 16px;font-weight:600}.stp-workspace-embed{-webkit-overflow-scrolling:touch;border-radius:var(--stp-radius-md);border:1px solid var(--stp-border-strong);background:var(--stp-surface-muted);max-height:min(78vh,900px);margin-top:4px;overflow:auto;box-shadow:inset 0 1px #fff9}