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.domain-link{border:0;background:transparent;padding:0;text-align:left;color:var(--blue);font-size:inherit;line-height:1.5;text-decoration:underline;text-decoration-color:#a8c2df;text-underline-offset:4px}.bank-update{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:23px}.bank-update strong{font-size:.86rem;font-weight:600}.bank-update p{font-size:.77rem;line-height:1.6;margin:5px 0 0;color:var(--muted)}.bank-update .btn{flex:none}.compact-update{border-bottom:1px solid var(--line);padding-bottom:17px;margin-top:-4px}.update-message{color:var(--blue)!important}.field select,.field input{font-size:16px}.question-stem,.question-zh,.option-copy,.source-list,.resource-item,.record-details{overflow-wrap:anywhere}.option-copy{font-size:16px}.option-copy .zh{font-size:14px}::selection{background:#cce1f8;color:#15395d}input{caret-color:var(--blue)}.study-start{border-left:1px solid var(--line)}.info-note{border-left-width:1px}.type-guide>div{border-top-width:1px}.source-list{font-size:14px}.question-zh{font-size:16px}.topbar{backdrop-filter:none;background:#fff}.track-label{display:none}@media(max-width:540px){.bank-update{gap:11px}.bank-update strong{font-size:.8rem}.bank-update p{font-size:.72rem}.bank-update .btn{font-size:.75rem;padding:8px 10px}.option-copy{font-size:16px}.option-copy .zh{font-size:14px}.field select,.field input{font-size:16px}.question-zh{font-size:16px}.type-guide>div{border-left-width:1px}}
.source-disclosure{border:1px solid var(--line);border-radius:8px;margin-top:21px;background:#fff}.source-disclosure>summary{cursor:pointer;padding:14px 17px;color:var(--blue);font-size:.9rem;font-weight:650;min-height:48px;line-height:1.55}.source-disclosure>summary:hover{background:var(--pale)}.source-disclosure[open]>summary{border-bottom:1px solid var(--line)}.source-content{padding:18px}.source-content .basis{margin:0 0 12px;font-size:.85rem!important;line-height:1.7}.source-date-note{font-size:.76rem!important;color:var(--muted);line-height:1.7!important}.source-evidence{padding:18px 0;border-top:1px solid var(--line)}.source-evidence h4{font-size:.9rem;font-weight:650;line-height:1.6;margin:0 0 12px;overflow-wrap:anywhere}.source-metadata{margin:0 0 14px;font-size:.77rem;line-height:1.65}.source-metadata>div{display:grid;grid-template-columns:145px minmax(0,1fr);gap:12px;margin:6px 0}.source-metadata dt{color:var(--muted)}.source-metadata dd{margin:0;overflow-wrap:anywhere}.support-label{font-size:.78rem!important;color:var(--blue);font-weight:600;margin-bottom:7px}.support-text{font-size:.9rem!important;line-height:1.85!important;white-space:pre-line;overflow-wrap:anywhere}.source-evidence .btn{margin:2px 0 5px}.source-disclosure .source-content>p:last-child{font-size:.77rem!important}@media(max-width:540px){.source-content{padding:15px}.source-metadata>div{grid-template-columns:1fr;gap:2px;margin:9px 0}.source-evidence h4{font-size:16px}.support-text{font-size:16px!important}.source-disclosure>summary{font-size:16px}.source-disclosure .source-content>p:last-child{font-size:14px!important}}

.solution-answer{border-left:3px solid var(--green);padding:2px 0 2px 15px;margin:20px 0 24px}.solution-answer h3{color:var(--green)}.solution-answer p{margin-bottom:7px;overflow-wrap:anywhere}.solution-answer .zh{color:var(--muted);font-size:.85rem}.solution-answer p:last-child{margin-bottom:0}

/* Account entry follows the existing restrained study workspace. */
.auth-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,420px);align-items:center;gap:70px;max-width:1100px;margin:auto;padding:60px 36px}.auth-shell:has(>.auth-card:only-child){grid-template-columns:minmax(0,620px);justify-content:center}.auth-intro h1{font-size:clamp(2rem,4vw,3.1rem);line-height:1.45;letter-spacing:-.04em;margin:20px 0}.auth-intro>p{max-width:36em;line-height:1.9;color:var(--muted)}.auth-eyebrow{font-size:.85rem!important;font-weight:700;color:var(--navy)!important;letter-spacing:.14em}.auth-facts{display:flex;flex-wrap:wrap;gap:12px 22px;font-size:.8rem;color:var(--navy);margin:32px 0}.auth-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:35px;min-width:0}.auth-card h1{font-size:1.65rem;line-height:1.5}.auth-card h2{font-size:1.35rem}.auth-card>p{font-size:.88rem;line-height:1.85;color:var(--muted);overflow-wrap:anywhere}.auth-card form{margin-top:25px}.auth-card .field,.auth-card .btn,dialog form .field{width:100%}.auth-card .field input,dialog form .field input{width:100%;box-sizing:border-box}.auth-card .field input{margin-top:7px}.field-help{font-size:.72rem;color:var(--muted);line-height:1.7;margin:7px 0 19px}.auth-card form>.btn{margin-top:22px;min-height:46px}.auth-toggle{margin-top:15px}.auth-error{color:var(--red)!important;font-size:.85rem;line-height:1.75;overflow-wrap:anywhere}.auth-error:empty{display:none}.account-link{border:0;background:transparent;color:var(--navy);font-weight:600;padding:6px;max-width:165px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cloud-status{font-size:.72rem;color:var(--green);white-space:nowrap}.cloud-status[data-phase=saving]{color:var(--muted)}.cloud-status[data-phase=offline]{color:#925716}.account-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}.account-panel h2{overflow-wrap:anywhere}.account-panel p{margin-bottom:0;color:var(--muted);font-size:.82rem}.recovery-files{display:flex;flex-direction:column;gap:10px;margin:22px 0}.recovery-actions{margin-top:18px;flex-wrap:wrap}.recovery-actions .btn{width:auto}.recovery-card .small{font-size:.78rem}.recovery-card .btn{white-space:normal}dialog form .field{display:flex;flex-direction:column;gap:8px;margin:20px 0}.top-actions{flex-wrap:wrap;justify-content:flex-end}.skip-link:focus{z-index:150}
@media(max-width:800px){.auth-shell{grid-template-columns:minmax(0,1fr);max-width:580px;padding:35px 20px;gap:24px;align-content:center}.auth-intro h1{font-size:2rem;margin:10px 0}.auth-intro>p:not(.auth-eyebrow){font-size:.88rem;margin-bottom:10px}.auth-facts{margin:18px 0;gap:12px}.auth-card{padding:27px}.top-actions{display:grid;grid-template-columns:auto auto;column-gap:7px;row-gap:3px}.cloud-status{grid-column:1 / -1;grid-row:2;font-size:.68rem;text-align:right}.account-link{font-size:.75rem;max-width:112px;padding:3px}.account-panel{align-items:flex-start;flex-direction:column;gap:14px}.recovery-card h1{font-size:1.45rem}}
@media(max-width:380px){.auth-shell{padding:25px 14px}.auth-card{padding:23px}.topbar{gap:4px}.account-link{max-width:75px}.top-actions{font-size:.65rem}.check-label{font-size:.65rem}.track-switch button{padding:8px}}