:root{--font-family:Arial,Helvetica,sans-serif;--color-header-start:#2e79b9;--color-header-end:#5fa8dc;--color-navbar-top:#d9ebf9;--color-navbar-bottom:#9dc3e6;--color-primary-dark:#1f5fa9;--color-nav-dark:#1f4e79;--color-border-box:#4a78a8;--color-border-btn:#7aa7d9;--color-answered:#1e8449;--color-seen:#e53935;--color-accent-red:#d32f2f;--color-timer:red;--color-footer-bg:#f4f4f4}*{box-sizing:border-box}body{margin:0;background:#fff;font-family:var(--font-family);font-size:14px;color:#000}.page{min-height:100vh;display:flex;flex-direction:column}.banner{position:relative;height:88px;background:linear-gradient(to right,var(--color-header-start),var(--color-header-end));overflow:hidden}.banner:after{content:"";position:absolute;top:-20px;bottom:-20px;left:52%;width:220px;background:linear-gradient(115deg,transparent 0 12px,#fff 12px 16px,transparent 16px 48px,#fff 48px 58px,transparent 58px 96px,#fff 96px 100px,transparent 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var(--color-nav-dark)}.chip-correct{background:#00c;color:#fff}.chip-wrong{background:#f0a04b;color:#000}.result-wrap{display:flex;gap:24px;align-items:flex-start}.result-tables{flex:1 1;min-width:0}.result-table{border-collapse:collapse;width:100%;table-layout:fixed;margin-bottom:14px}.result-table td,.result-table th{border:1px solid #7aa7d9;height:26px;padding:0;text-align:center;font-size:13px;font-weight:400;background:#fff}.result-table th{font-weight:700}.result-label-col{width:120px}.result-table td.cell-none{background:#e8e8e8}.result-table td.cell-correct{background:#00c}.result-table td.cell-wrong{background:#f0a04b}.result-summary{width:320px;flex-shrink:0;font-size:13px;line-height:2}.result-pass{color:var(--color-answered)}.result-fail,.result-pass{font-weight:700;font-size:16px}.result-fail{color:var(--color-accent-red)}.result-table th.th-question{cursor:pointer}.result-table th.th-question:hover{background:#d9ebf9}.result-table th.th-active{background:var(--color-primary-dark);color:#fff}.result-table tbody td{cursor:pointer}.review-hint{font-size:12px;color:#555;margin-top:-6px}.review-box{border:1px solid var(--color-border-box);background:#fff;margin-top:16px;padding:12px 16px}.review-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.review-nav{display:flex;gap:8px}.review-nav-btn{width:auto;padding:0 14px}.review-nav-btn:disabled{color:#999;cursor:default}.review-option{margin-top:8px;font-size:16px;line-height:1.4}.review-option-correct{color:var(--color-answered);font-weight:700}.review-option-wrong{color:var(--color-seen)}.review-tag-correct{color:var(--color-answered);font-weight:700;font-size:13px}.review-tag-wrong{color:var(--color-seen);font-weight:700;font-size:13px}.review-explanation{margin-top:14px;padding:8px 10px;background:#f4f8fc;border:1px solid var(--color-border-btn);font-size:14px;line-height:1.5}@media (max-width:1023px){.result-wrap{flex-direction:column}.result-summary{width:auto}.result-tables{width:100%;overflow-x:auto}}.submit-row{text-align:center;margin:14px 0}.submit-btn{width:200px;height:30px;background:linear-gradient(180deg,#f5f5f5,#dcdcdc);border:1px solid #8c8c8c;border-radius:0;color:#333;font-size:14px;font-family:var(--font-family);cursor:pointer}.submit-btn:hover{background:#e8e8e8}.kb-guide{margin-top:16px;font-size:13px;line-height:1.6}.footer{margin-top:24px;height:28px;background:var(--color-footer-bg);border-top:1px solid #ddd;border-bottom:1px solid #ddd;align-items:center;font-size:12px;color:#333}.footer,.login-page{display:flex;justify-content:center}.login-page{min-height:100vh;background:linear-gradient(135deg,#123f6d,#2e79b9 45%,#5fa8dc);align-items:flex-start;padding-top:9vh}.login-card{background:#fff;border-radius:8px;width:460px;max-width:calc(100vw - 32px);padding:28px 36px 22px;text-align:center}.login-logo{display:inline-block;background:#2e79b9;color:#fff;font-weight:700;font-size:22px;padding:14px 26px;border-radius:10px;letter-spacing:1px}.login-title{font-size:13px;color:#333;margin:16px 0 18px}.login-input{width:100%;height:34px;border:1px solid #bbb;padding:0 10px;font-size:14px;font-family:var(--font-family);margin-bottom:10px}.login-error{color:#d32f2f;font-size:13px;text-align:left;margin-bottom:8px}.captcha-row{gap:8px}.captcha-box,.captcha-row{display:flex;align-items:center}.captcha-box{flex-shrink:0;width:110px;height:34px;border:1px solid #bbb;background:#fafafa;justify-content:center;gap:4px;font-style:italic;font-weight:700;font-size:18px;color:#2e7d32;-webkit-user-select:none;-moz-user-select:none;user-select:none}.captcha-box span{display:inline-block}.captcha-refresh{flex-shrink:0;width:34px;height:34px;background:linear-gradient(180deg,#f5f5f5,#dcdcdc);border:1px solid #8c8c8c;border-radius:0;font-size:16px;cursor:pointer}.captcha-input{margin-bottom:0}.login-btn{width:100%;height:36px;margin-top:12px;background:linear-gradient(180deg,#5fa8dc,#2e79b9);border:1px solid #2465a0;color:#fff;font-size:14px;font-family:var(--font-family);cursor:pointer}.login-btn:hover{background:linear-gradient(180deg,#6fb2e2,#3a86c6)}.login-links{margin-top:12px;font-size:13px}.login-links a{color:#2e79b9;text-decoration:none}.login-links a:hover{text-decoration:underline}.login-demo-hint{text-align:center;color:#d9ebf9;font-size:12px;margin-top:14px}.home-table{border-collapse:collapse;width:100%;margin-bottom:8px}.home-table td,.home-table th{border:1px solid #7aa7d9;height:30px;padding:4px 10px;font-size:13px;text-align:center}.home-table th{background:#d9ebf9;color:#1f4e79}.home-td-left{text-align:left}.home-col-xs{width:50px}.home-col-sm{width:90px}.home-col-md{width:180px}.home-start-btn{width:auto;padding:0 16px;height:26px}.home-pending-note{font-size:13px;color:#d32f2f;margin-bottom:8px}.home-subtitle{margin-top:28px}.home-empty{font-size:14px;color:#555}@media (max-width:1023px){.exam-box{flex-direction:column-reverse}.question-grid{width:100%;max-width:300px;margin:0 auto}.timer{position:-webkit-sticky;position:sticky;top:4px}}@media (max-width:479px){.q-btn{height:24px;font-size:12px}.option-row{font-size:15px;min-height:40px;align-items:center}}.nav-item-active{background:hsla(0,0%,100%,.5);font-weight:700}.nav-item-disabled{color:#8ba7bf;cursor:default}.nav-item-disabled:hover{background:transparent}.admin-subtitle{font-size:15px;color:var(--color-primary-dark);margin:18px 0 8px}.admin-form-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.admin-input{width:220px;margin-bottom:0}.admin-file,.admin-flash{font-size:13px}.admin-flash{padding:8px 12px;margin-bottom:10px;border:1px 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