*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:#172033;background:linear-gradient(145deg,#edf4ff,#f8fbff 45%,#eef8ff)}button,input,select,textarea{font:inherit}.boot{min-height:100vh;display:grid;place-items:center;align-content:center;gap:10px;color:#64748b}.boot-logo{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;background:#2563eb;color:#fff;font-size:28px;font-weight:900;box-shadow:0 16px 35px rgba(37,99,235,.25)}.boot strong{font-size:22px;color:#172033}.boot span{font-size:13px}
.app-shell{min-height:100vh}.topbar{height:72px;position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));background:rgba(255,255,255,.9);border-bottom:1px solid rgba(226,232,240,.9);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:11px}.brand-logo{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(145deg,#2563eb,#3b82f6);color:#fff;font-weight:900}.brand b{display:block;font-size:16px}.brand small{display:block;color:#94a3b8;margin-top:2px}.top-actions{display:flex;align-items:center;gap:8px}.nav-btn,.ghost-btn,.primary-btn,.soft-btn,.danger-btn,.paper-btn{border:0;cursor:pointer;border-radius:12px;font-weight:800;transition:.18s}.nav-btn{padding:9px 12px;background:transparent;color:#64748b}.nav-btn:hover,.nav-btn.active{background:#eff6ff;color:#2563eb}.subject-back{display:inline-flex;align-items:center;padding:9px 12px;border-radius:12px;color:#2563eb;text-decoration:none;font-weight:800;background:#eff6ff}.page{width:min(1180px,calc(100% - 40px));margin:0 auto;padding:30px 0 48px}.hero{display:grid;grid-template-columns:1.45fr .8fr;gap:18px}.glass{background:rgba(255,255,255,.87);border:1px solid rgba(255,255,255,.96);box-shadow:0 20px 60px rgba(30,64,175,.09);backdrop-filter:blur(14px)}.hero-main{padding:34px;border-radius:26px;position:relative;overflow:hidden}.hero-watermark{position:absolute;right:25px;bottom:-30px;font-size:145px;color:rgba(37,99,235,.055);font-weight:900;pointer-events:none}.badge{display:inline-flex;padding:7px 11px;border-radius:999px;background:#dbeafe;color:#2563eb;font-size:12px;font-weight:850}.hero h1{margin:17px 0 9px;font-size:clamp(30px,4vw,48px);letter-spacing:-1px}.hero p{max-width:650px;margin:0;color:#64748b;line-height:1.8}.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.stat-card{padding:22px;border-radius:22px}.stat-card span{color:#64748b;font-size:12px}.stat-card strong{display:block;margin-top:8px;font-size:28px}.stat-card small{display:block;margin-top:4px;color:#94a3b8}.section{margin-top:22px;padding:26px;border-radius:24px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:18px}.section-head h2{margin:0;font-size:20px}.section-head p{margin:4px 0 0;color:#94a3b8;font-size:12px}.mode-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.mode-card{padding:21px;border:1px solid #e2e8f0;border-radius:18px;background:#fff;cursor:pointer;text-align:left;transition:.18s}.mode-card:hover,.mode-card.active{border-color:#60a5fa;background:#eff6ff;transform:translateY(-2px)}.mode-card h3{margin:0 0 7px}.mode-card p{margin:0;color:#64748b;font-size:12px;line-height:1.6}.mode-icon{width:42px;height:42px;margin-bottom:13px;border-radius:13px;display:grid;place-items:center;background:#dbeafe;color:#2563eb;font-size:19px;font-weight:900}.filter-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px;margin-top:18px}.field label{display:block;margin-bottom:7px;color:#64748b;font-size:12px;font-weight:800}.field select,.field input{width:100%;height:45px;border:1px solid #dbe3ef;border-radius:12px;background:#fff;padding:0 12px;outline:0}.field select:focus,.field input:focus,.answer-textarea:focus,.fill-input:focus{border-color:#60a5fa;box-shadow:0 0 0 3px rgba(37,99,235,.10)}.practice-actions{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:16px}.check{display:flex;align-items:center;gap:8px;color:#64748b;font-size:13px}.check input{width:17px;height:17px}.primary-btn{min-height:44px;padding:0 20px;background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.2)}.primary-btn:hover{transform:translateY(-1px)}.soft-btn{min-height:40px;padding:0 15px;background:#eff6ff;color:#2563eb}.ghost-btn{min-height:40px;padding:0 15px;background:#fff;color:#475569;border:1px solid #dbe3ef}.danger-btn{min-height:40px;padding:0 15px;background:#fff1f2;color:#be123c}.empty{padding:45px 20px;text-align:center;color:#94a3b8}.empty strong{display:block;color:#475569;font-size:18px;margin-bottom:7px}
.paper-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.paper-card{display:flex;flex-direction:column;min-height:150px;padding:19px;border:1px solid #e2e8f0;border-radius:17px;background:#fff;transition:.18s}.paper-card:hover{border-color:#93c5fd;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.1)}.paper-card h3{margin:0 0 7px;font-size:16px}.paper-card p{margin:0;color:#64748b;font-size:12px;line-height:1.65;flex:1}.paper-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:13px;color:#94a3b8;font-size:12px}.paper-btn{height:39px;margin-top:13px;background:#2563eb;color:#fff}.paper-note{padding:12px 14px;border-radius:13px;background:#eff6ff;color:#1d4ed8;font-size:13px;line-height:1.65;margin-bottom:16px}
.quiz-wrap{width:min(920px,calc(100% - 34px));margin:0 auto;padding:26px 0 50px}.quiz-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.quiz-progress{flex:1;height:8px;border-radius:999px;background:#e2e8f0;overflow:hidden}.quiz-progress i{display:block;height:100%;background:linear-gradient(90deg,#2563eb,#60a5fa);border-radius:inherit}.quiz-index{min-width:78px;text-align:right;color:#64748b;font-size:13px}.quiz-card{padding:30px;border-radius:26px}.question-meta{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:17px}.pill{padding:6px 10px;border-radius:999px;background:#f1f5f9;color:#64748b;font-size:12px;font-weight:800}.pill.blue{background:#dbeafe;color:#2563eb}.question-title{font-size:20px;line-height:1.75;font-weight:750;white-space:pre-wrap}.question-images,.answer-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.question-images img,.answer-images img{width:100%;max-height:420px;object-fit:contain;border:1px solid #e2e8f0;border-radius:14px;background:#fff;cursor:zoom-in}.options{display:grid;gap:10px;margin-top:20px}.option{width:100%;min-height:50px;border:1px solid #dbe3ef;border-radius:14px;background:#fff;padding:12px 15px;display:flex;align-items:flex-start;gap:11px;text-align:left;cursor:pointer;color:#334155}.option:hover{border-color:#93c5fd;background:#f8fbff}.option.selected{border-color:#60a5fa;background:#eff6ff}.option.correct{border-color:#4ade80;background:#f0fdf4;color:#166534}.option.wrong{border-color:#fda4af;background:#fff1f2;color:#9f1239}.option-key{width:28px;height:28px;flex:0 0 auto;border-radius:9px;display:grid;place-items:center;background:#f1f5f9;font-weight:900}.judge-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.judge-btn{height:54px;border:1px solid #dbe3ef;border-radius:14px;background:#fff;cursor:pointer;font-weight:850}.judge-btn.selected{background:#eff6ff;color:#2563eb;border-color:#60a5fa}.fill-input,.answer-textarea{width:100%;margin-top:20px;border:1px solid #dbe3ef;border-radius:14px;background:#fff;padding:13px 15px;outline:0}.fill-input{height:50px}.answer-textarea{min-height:150px;resize:vertical;line-height:1.7}.answer-box{margin-top:20px;padding:18px;border-radius:16px;background:#f8fafc;border:1px solid #e2e8f0}.answer-box h4{margin:0 0 9px;color:#2563eb}.answer-box .answer-content{white-space:pre-wrap;line-height:1.75;color:#475569}.result-tip{margin-top:14px;padding:12px 14px;border-radius:12px;font-weight:800}.result-tip.ok{background:#f0fdf4;color:#15803d}.result-tip.no{background:#fff1f2;color:#be123c}.result-tip.neutral{background:#eff6ff;color:#2563eb}.self-grade{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.quiz-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:20px}.quiz-actions .right{display:flex;gap:9px}.bookmark-btn.active{background:#fff7ed;color:#c2410c;border-color:#fdba74}
.paper-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:14px;padding:13px 16px;border-radius:16px;background:#fff;border:1px solid #e2e8f0}.paper-title-box b{display:block}.paper-title-box span{display:block;margin-top:3px;color:#94a3b8;font-size:12px}.timer{padding:8px 12px;border-radius:11px;background:#eff6ff;color:#1d4ed8;font-variant-numeric:tabular-nums;font-weight:900}.paper-answer-card{margin-top:16px;padding:17px;border-radius:18px;background:#fff;border:1px solid #e2e8f0}.paper-answer-card h3{margin:0 0 11px;font-size:15px}.answer-dots{display:flex;flex-wrap:wrap;gap:7px}.answer-dot{width:34px;height:34px;border:1px solid #dbe3ef;border-radius:9px;background:#fff;color:#64748b;cursor:pointer;font-size:12px;font-weight:800}.answer-dot.answered{background:#dbeafe;color:#1d4ed8;border-color:#93c5fd}.answer-dot.current{outline:3px solid rgba(37,99,235,.16);border-color:#2563eb}.answer-dot.correct{background:#dcfce7;color:#166534;border-color:#86efac}.answer-dot.wrong{background:#ffe4e6;color:#be123c;border-color:#fda4af}.answer-dot.subjective{background:#f8fafc;color:#475569}.paper-submit-row{display:flex;justify-content:flex-end;margin-top:15px}.paper-result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.paper-result-card{padding:20px;border-radius:17px;border:1px solid #e2e8f0;background:#fff}.paper-result-card span{color:#64748b;font-size:12px}.paper-result-card strong{display:block;margin-top:8px;font-size:27px}.paper-result-summary{margin-top:17px;padding:17px;border-radius:15px;background:#f8fafc;color:#475569;line-height:1.8}.paper-review-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:17px}
.list-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.list-toolbar input,.list-toolbar select{height:42px;border:1px solid #dbe3ef;border-radius:11px;padding:0 11px;background:#fff}.list-toolbar input{flex:1;min-width:220px}.question-list{display:grid;gap:12px}.list-card{padding:20px;border:1px solid #e2e8f0;border-radius:17px;background:#fff}.list-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.list-card h3{margin:9px 0 0;font-size:15px;line-height:1.65;white-space:pre-wrap}.list-answer{margin-top:12px;padding:12px;border-radius:11px;background:#f8fafc;color:#64748b;white-space:pre-wrap;font-size:13px;line-height:1.65}.report-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.report-card{padding:21px;border-radius:18px;background:#fff;border:1px solid #e2e8f0}.report-card span{color:#64748b;font-size:12px}.report-card strong{display:block;margin-top:8px;font-size:27px}.type-table{width:100%;border-collapse:collapse;margin-top:16px}.type-table th,.type-table td{text-align:left;padding:12px;border-bottom:1px solid #e2e8f0;font-size:13px}.type-table th{color:#64748b}.image-viewer{position:fixed;inset:0;z-index:9999;display:grid;place-items:center;padding:20px;background:rgba(15,23,42,.84)}.image-viewer img{max-width:96vw;max-height:92vh;background:#fff;border-radius:12px}.toast{position:fixed;left:50%;bottom:26px;z-index:10000;transform:translateX(-50%);padding:11px 16px;border-radius:999px;background:#172033;color:#fff;font-size:13px;box-shadow:0 12px 35px rgba(0,0,0,.2)}
@media(max-width:850px){.topbar{padding:0 16px}.page{width:min(100% - 22px,1180px);padding-top:18px}.hero{grid-template-columns:1fr}.hero-stats{grid-template-columns:repeat(4,1fr)}.stat-card{padding:16px}.stat-card strong{font-size:22px}.paper-grid{grid-template-columns:repeat(2,1fr)}.report-grid,.paper-result-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.topbar{height:60px}.brand small{display:none}.brand b{font-size:14px}.brand-logo{width:36px;height:36px}.subject-back{padding:8px 9px;font-size:12px}.top-actions{gap:2px}.nav-btn{padding:8px;font-size:12px}.hero-main{padding:24px;border-radius:21px}.hero h1{font-size:30px}.hero p{font-size:13px}.hero-stats{grid-template-columns:repeat(2,1fr)}.section{padding:19px;border-radius:20px}.mode-grid{grid-template-columns:1fr}.filter-grid{grid-template-columns:1fr 1fr;gap:9px}.filter-grid .field:first-child{grid-column:1/-1}.practice-actions{align-items:flex-end}.practice-actions .primary-btn{flex:1}.paper-grid{grid-template-columns:1fr}.quiz-wrap{width:min(100% - 18px,920px);padding-top:15px}.quiz-card{padding:20px 17px;border-radius:21px}.question-title{font-size:17px;line-height:1.7}.question-images,.answer-images{grid-template-columns:1fr}.quiz-actions{align-items:stretch}.quiz-actions .right{flex:1}.quiz-actions button{flex:1;padding:0 10px}.paper-toolbar{align-items:flex-start}.paper-title-box{min-width:0}.timer{flex:0 0 auto}.answer-dot{width:31px;height:31px}.list-card{padding:16px}.report-grid,.paper-result-grid{grid-template-columns:1fr 1fr}.section-head{align-items:flex-start}.type-table th,.type-table td{padding:10px 7px;font-size:12px}}


/* V6.6 移动端按钮与图标精修 */
.ui-icon{width:18px;height:18px;display:block;flex:0 0 auto}
.nav-btn,.ghost-btn,.primary-btn,.soft-btn,.danger-btn,.paper-btn,.subject-back,.bookmark-btn,.judge-btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap;line-height:1}
.subject-back{height:40px;gap:7px;padding:0 12px;border:1px solid #dbeafe;background:linear-gradient(180deg,#f8fbff,#eff6ff);box-shadow:0 6px 16px rgba(37,99,235,.08)}
.subject-back:hover{border-color:#93c5fd;background:#eaf3ff;transform:translateY(-1px)}
.subject-back-icon{width:24px;height:24px;border-radius:8px;display:grid;place-items:center;background:#fff;color:#2563eb;box-shadow:0 2px 8px rgba(37,99,235,.12)}
.subject-back-icon .ui-icon{width:15px;height:15px}
.question-meta{align-items:center}
.question-meta .pill,.question-meta .bookmark-btn{height:34px;min-height:34px;border-radius:12px;font-size:13px}
.question-meta .pill{display:inline-flex;align-items:center;padding:0 12px}
.question-meta .bookmark-btn{margin-left:auto;padding:0 12px;color:#475569;background:#fff;border:1px solid #dbe3ef;box-shadow:0 3px 10px rgba(15,23,42,.035)}
.question-meta .bookmark-btn:hover{border-color:#93c5fd;background:#f8fbff;color:#2563eb}
.question-meta .bookmark-btn.active{background:#fff7ed;color:#c2410c;border-color:#fdba74}
.question-number{display:inline-flex;align-items:center;justify-content:center;height:34px;margin:0 0 14px;padding:0 14px;border:1px solid #dbeafe;border-radius:12px;background:linear-gradient(180deg,#f8fbff,#eff6ff);color:#2563eb;font-size:14px;font-weight:900;letter-spacing:.04em}
.question-number.compact{height:30px;margin:10px 0 0;padding:0 11px;font-size:12px;border-radius:10px}
.quiz-actions>button,.quiz-actions .right>button{height:52px;min-height:52px;border-radius:14px;font-size:16px;font-weight:850}
.quiz-actions button:disabled{opacity:.45;cursor:not-allowed;transform:none}
.quiz-actions .primary-btn{box-shadow:0 8px 20px rgba(37,99,235,.18)}

@media(max-width:600px){
  .topbar{padding:0 12px;gap:8px}
  .top-actions{gap:3px;min-width:0}
  .subject-back{height:36px;padding:0 9px;gap:5px;border-radius:11px;font-size:12px}
  .subject-back-icon{width:21px;height:21px;border-radius:7px}
  .subject-back-icon .ui-icon{width:13px;height:13px}
  .question-meta{gap:7px;margin-bottom:16px}
  .question-meta .pill,.question-meta .bookmark-btn{height:34px;min-height:34px;padding:0 11px;font-size:12px}
  .question-meta .bookmark-btn{margin-left:0}
  .question-number{height:32px;padding:0 13px;margin-bottom:13px;font-size:13px}
  .quiz-actions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2.15fr);gap:8px;align-items:stretch}
  .quiz-actions .right{display:grid;grid-template-columns:minmax(104px,1.15fr) minmax(0,1fr);gap:8px;min-width:0}
  .quiz-actions .right>button:only-child{grid-column:1/-1}
  .quiz-actions>button,.quiz-actions .right>button{width:100%;height:52px;min-height:52px;padding:0 8px;border-radius:14px;font-size:15px;white-space:nowrap}
  .quiz-actions .ui-icon{width:17px;height:17px}
}

@media(max-width:390px){
  .topbar{padding:0 9px}
  .brand{gap:7px}
  .brand-logo{width:34px;height:34px;border-radius:11px}
  .brand b{font-size:13px}
  .nav-btn{padding:7px 6px;font-size:11px}
  .subject-back{padding:0 7px}
  .quiz-card{padding-left:15px;padding-right:15px}
  .quiz-actions{grid-template-columns:minmax(0,.95fr) minmax(0,2.25fr)}
  .quiz-actions .right{grid-template-columns:minmax(100px,1.18fr) minmax(0,1fr);gap:7px}
  .quiz-actions>button,.quiz-actions .right>button{font-size:14px;padding:0 6px}
}

/* V6.6.1 移动端顶栏防换行 */
.brand{flex-shrink:0}.brand b{white-space:nowrap}
@media(max-width:600px){
  .top-actions{flex:1;justify-content:flex-end}
  .subject-back{padding:0 8px}
  .subject-back-icon{width:16px;height:16px;border-radius:0;background:transparent;box-shadow:none}
  .subject-back-icon .ui-icon{width:15px;height:15px}
}
@media(max-width:390px){
  .brand b{font-size:12px}
  .nav-btn{padding-left:5px;padding-right:5px}
  .subject-back{padding:0 6px;gap:4px}
}


/* V6.8.3 行内填空热修复：与管理学答题方式保持一致 */
.inline-fill-input{
  display:inline-block;
  width:clamp(92px, calc(var(--fill-ch, 8) * 1.05em), 230px);
  min-width:92px;
  height:46px;
  margin:0 6px 5px;
  padding:0 11px;
  border:1.5px solid #bdd3f8;
  border-bottom:2.5px solid #397cf5;
  border-radius:10px 10px 5px 5px;
  background:#f8fbff;
  color:#17233b;
  font:inherit;
  font-size:.92em;
  font-weight:700;
  line-height:1;
  text-align:center;
  vertical-align:middle;
  outline:none;
  box-shadow:0 3px 10px rgba(48,105,210,.07);
  transition:border-color .18s,box-shadow .18s,background .18s;
}
.inline-fill-input:focus{
  border-color:#2f76f3;
  background:#fff;
  box-shadow:0 0 0 4px rgba(47,118,243,.12);
}
.inline-fill-input:disabled{
  opacity:1;
  color:#1d4ed8;
  background:#edf4ff;
  -webkit-text-fill-color:#1d4ed8;
}
@media(max-width:640px){
  .inline-fill-input{
    width:clamp(82px, calc(var(--fill-ch, 8) * .95em), 180px);
    min-width:82px;
    height:40px;
    margin:2px 4px 4px;
    padding:0 8px;
    border-radius:8px 8px 4px 4px;
    font-size:.9em;
  }
}