.kh-home{color:#202c29;letter-spacing:0;background:#fff;font-family:PingFang SC,Microsoft YaHei,sans-serif;line-height:1.65}.kh-home *{box-sizing:border-box}.kh-home h1,.kh-home h2,.kh-home h3,.kh-home p{margin:0}.kh-home a{color:inherit;text-decoration:none}.kh-home button{font:inherit;cursor:pointer}.kh-home a:focus-visible,.kh-home button:focus-visible,.kh-home summary:focus-visible{outline-offset:5px;outline:3px solid #177b61}.kh-wrap{width:min(1200px,100% - 96px);margin:auto}.kh-header{background:#fff;justify-content:space-between;align-items:center;gap:24px;height:88px;padding:0 48px;display:flex}.kh-brand{white-space:nowrap;align-items:center;gap:12px;font-size:23px;font-weight:750;display:inline-flex}.kh-brand>span{color:#fff;background:#17684f;border-radius:8px 2px;place-items:center;width:38px;height:38px;font-size:23px;display:grid}.kh-header nav{gap:36px;display:flex}.kh-header nav button{color:#525e58;background:0 0;border:0;padding:10px 0}.kh-header nav button:hover,.kh-home a:not(.kh-cta):hover{color:#177b61}.kh-login{align-items:center;gap:16px;font-size:14px;font-weight:600;display:flex}.kh-hero{isolation:isolate;background:#edf1ee;height:min(680px,100svh - 180px);min-height:570px;position:relative;overflow:hidden}.kh-hero-photo{object-fit:cover;object-position:center 55%;z-index:-2;width:100%;height:100%;position:absolute;inset:0}.kh-hero:before{content:"";z-index:-1;background:linear-gradient(90deg,#f3f7f5 0%,#f3f7f5f2 30%,#f3f7f566 52%,#0000 73%);position:absolute;inset:0}.kh-hero-inner{width:min(1200px,100% - 96px);margin:auto;padding:54px 0}.kh-kicker{color:#17684f;font-size:13px;font-weight:650;margin-bottom:18px!important}.kh-hero h1{margin-bottom:20px;font-size:64px;font-weight:750;line-height:1.2}.kh-hero h2{font-size:36px;font-weight:500;line-height:1.45}.kh-hero-description{color:#475b53;font-size:16px;margin:24px 0 28px!important}.kh-cta{background:#17684f;border-radius:4px;justify-content:center;align-items:center;gap:30px;min-height:54px;padding:12px 25px;font-size:16px;font-weight:650;transition:background .18s;display:inline-flex;color:#fff!important}.kh-cta:hover{background:#104d3b}.kh-hero-note{color:#596960;font-size:12px;margin-top:17px!important}.kh-photo-caption{color:#fff;background:#202c29b8;padding:5px 12px;font-size:12px;position:absolute;bottom:25px;right:40px}.kh-entry{padding:56px 0 64px}.kh-home h2{font-weight:600}.kh-entry h2{font-size:26px}.kh-entry .kh-kicker{margin-bottom:8px!important}.kh-entry-links{border-top:1px solid #dfe6e2;border-bottom:1px solid #dfe6e2;grid-template-columns:repeat(3,1fr);margin-top:28px;display:grid}.kh-entry-links>a{border-right:1px solid #dfe6e2;align-items:center;gap:18px;padding:26px 20px;display:flex}.kh-entry-links>a:first-child{padding-left:0}.kh-entry-links>a:last-child{border:0}.kh-entry-links svg{flex-shrink:0;margin-left:auto}.kh-number{color:#7a9287;font-variant-numeric:tabular-nums;font-size:14px}.kh-entry-links h3{font-size:16px;font-weight:600}.kh-entry-links p{color:#738079;margin-top:5px;font-size:13px}.kh-method{background:#f1f5f3;padding:78px 0}.kh-section-heading{justify-content:space-between;align-items:end;gap:32px;margin-bottom:40px;display:flex}.kh-section-heading h2,.kh-faq h2{font-size:36px;line-height:1.5}.kh-section-heading>p{color:#61716a;padding-bottom:6px;font-size:15px}.kh-steps{grid-template-columns:repeat(4,1fr);gap:32px;display:grid}.kh-steps article{border-top:1px solid #bacfc3;padding-top:22px}.kh-step-top{color:#17684f;justify-content:space-between;align-items:center;display:flex}.kh-step-top span{color:#899c93;font-size:13px}.kh-steps h3{margin:26px 0 10px;font-size:22px}.kh-steps p{color:#61716a;font-size:14px}.kh-subjects{padding:84px 0 70px}.kh-inline-link{align-items:center;gap:16px;font-size:14px;display:inline-flex;color:#17684f!important}.kh-subject-grid{grid-template-columns:1fr 1fr;gap:0 48px;display:grid}.kh-home summary{cursor:pointer;list-style:none}.kh-home summary::-webkit-details-marker{display:none}.kh-subject-grid details{border-bottom:1px solid #dfe6e2}.kh-subject-grid summary{align-items:center;gap:22px;padding:28px 0;display:flex}.kh-subject-grid h3{font-size:20px;font-weight:600}.kh-subject-grid summary p{color:#738079;margin-top:4px;font-size:14px}.kh-plus{color:#17684f;flex-shrink:0;margin-left:auto;font-size:23px}.kh-home details[open] .kh-plus{rotate:45deg}.kh-subject-detail{color:#61716a;padding:0 0 24px 40px;font-size:14px}.kh-subject-detail a{color:#17684f;align-items:center;gap:12px;margin-top:14px;display:inline-flex}.kh-subject-note{color:#738079;font-size:12px;margin-top:25px!important}.kh-faq{background:#f8f9fa;padding:64px 0}.kh-faq-grid{grid-template-columns:1fr 1.4fr;gap:80px;display:grid}.kh-faq-grid>div>p:last-child{color:#738079;margin-top:15px;font-size:14px}.kh-faq details{border-bottom:1px solid #dfe6e2}.kh-faq summary{align-items:center;gap:20px;padding:22px 0;font-size:16px;display:flex}.kh-faq details p{color:#61716a;padding:0 30px 22px 0;font-size:14px}.kh-closing{text-align:center;background:#e9f1ed;padding:68px 24px}.kh-closing>p{color:#61716a;font-size:14px}.kh-closing h2{margin:8px 0 26px;font-size:36px}.kh-footer{grid-template-columns:1fr auto;align-items:center;gap:24px;padding:48px 0 30px;display:grid}.kh-footer p{color:#738079;margin-top:12px;font-size:13px}.kh-footer nav{gap:24px;font-size:13px;display:flex}.kh-footer small{color:#738079;border-top:1px solid #e4e9e6;grid-column:1/-1;padding-top:24px;font-size:12px}.kh-beian{color:inherit;text-decoration:none}.kh-beian:hover,.kh-beian:focus-visible{text-decoration:underline}@media (width<=1000px){.kh-header nav{gap:18px}.kh-wrap,.kh-hero-inner{width:calc(100% - 48px)}.kh-header{padding:0 24px}.kh-entry-links>a{gap:10px;padding:22px 12px}.kh-entry-links h3{font-size:14px}.kh-steps{gap:20px}.kh-faq-grid{gap:36px}}@media (width<=700px){.kh-header nav{display:none}.kh-hero{min-height:570px}.kh-hero h1{font-size:48px}.kh-hero h2{font-size:30px}.kh-hero:before{background:#f3f7f5db}.kh-photo-caption{display:none}.kh-entry-links,.kh-subject-grid,.kh-faq-grid{grid-template-columns:1fr}.kh-entry-links>a{border-bottom:1px solid #dfe6e2;border-right:0;padding-left:0}.kh-section-heading{flex-direction:column;align-items:start;gap:18px}.kh-section-heading h2,.kh-faq h2,.kh-closing h2{font-size:28px}.kh-steps{grid-template-columns:1fr 1fr}.kh-footer{grid-template-columns:1fr}}.kh-home{color:#17332f;background:#fbfdfc}.kh-header{z-index:4;border-bottom:1px solid #e5eeea;height:76px;position:sticky;top:0;box-shadow:0 4px 16px #1a473a0a}.kh-brand>span{background:linear-gradient(145deg,#176b78,#2c8b88);box-shadow:0 5px 12px #176b7833}.kh-hero{border-bottom:1px solid #e0ebe7;min-height:610px}.kh-hero:before{background:linear-gradient(90deg,#f5faf8 0%,#f5faf8f5 33%,#f5faf8a8 56%,#0000 80%)}.kh-hero h1{letter-spacing:-.045em;text-shadow:0 2px 18px #17332f14}.kh-cta{background:linear-gradient(135deg,#176b78,#21858d);border-radius:8px;transition:transform .18s,box-shadow .18s;box-shadow:0 10px 20px #176b7833}.kh-cta:hover{background:linear-gradient(135deg,#125967,#1b747b);transform:translateY(-2px);box-shadow:0 14px 26px #176b7840}.kh-entry-links>a{transition:background .18s,padding-left .18s}.kh-entry-links>a:hover{background:#f3f9f7;padding-left:12px}.kh-method{background:linear-gradient(135deg,#eef7f4,#f5f8f7)}.kh-steps article{transition:transform .18s}.kh-steps article:hover{transform:translateY(-4px)}.kh-subject-grid details,.kh-faq details{transition:background .18s}.kh-subject-grid details:hover,.kh-faq details:hover{background:#e8f4f173}.kh-closing{background:linear-gradient(135deg,#e5f2ed,#eef7f4)}.kh-brand>span{background:#e8f4f5;overflow:hidden}.kh-brand>span img{object-fit:contain;width:100%;height:100%}.xp-reader{--xp-paper:#fffefa;--xp-ink:#20313a;--xp-muted:#6b7b83;--xp-line:#dce5e4;--xp-teal:#167a72;--xp-soft:#e5f3f0;--xp-blue:#23678f;--xp-gold:#c69227;--xp-gold-soft:#fff7dc;--xp-green:#287a56;color:var(--xp-ink);font-size:14px;line-height:1.7}.xp-reader *{box-sizing:border-box}.xp-reader button{font:inherit;cursor:pointer;color:inherit}.xp-reader button:disabled{cursor:default;opacity:.55}.xp-reader button:focus-visible,.xp-evidence:focus-visible{outline-offset:3px;outline:3px solid #c69227}.xp-visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.xp-back{color:var(--xp-teal);background:0 0;border:0;margin-bottom:10px;padding:6px 0;font-weight:600}.xp-reading-mode{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;font-size:13px;display:flex}.xp-reading-mode>strong{margin-right:2px}.xp-mode-button{border:1px solid var(--xp-line);color:var(--xp-muted);background:#fff;border-radius:5px;padding:6px 13px}.xp-mode-button[aria-pressed=true]{border-color:var(--xp-teal);background:var(--xp-teal);color:#fff}.xp-mode-hint,.xp-attempt-state{color:var(--xp-muted);font-size:12px}.xp-attempt-state{margin-left:auto}.xp-panel{background:var(--xp-paper);border:1px solid var(--xp-line);border-radius:10px;overflow:hidden;box-shadow:0 12px 32px #21393f14}.xp-panel+.xp-panel{margin-top:18px}.xp-panel-head{border-bottom:1px solid var(--xp-line);justify-content:space-between;align-items:baseline;gap:14px;padding:14px 18px 12px;display:flex}.xp-panel-head h2{margin:0;font-size:17px;font-weight:700;line-height:1.45}.xp-panel-head h2>span{color:var(--xp-teal)}.xp-panel-head small{color:var(--xp-muted);font-size:11px}.xp-question-layout{padding:14px 18px 18px}.xp-source,.xp-options{min-width:0}.xp-evidence-key{flex-wrap:wrap;gap:3px 10px;margin-bottom:16px;display:flex}.xp-evidence-key button{color:var(--xp-muted);text-align:left;background:0 0;border:0;align-items:center;gap:4px;padding:3px 0;font-size:11px;display:inline-flex}.xp-evidence-key b{color:var(--xp-teal);font-size:16px}.xp-ask{border-left:3px solid var(--xp-teal);color:var(--xp-blue);white-space:pre-wrap;overflow-wrap:anywhere;margin:0 0 15px;padding-left:12px;font-size:16px;font-weight:700;line-height:1.9}.xp-passage{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;font-size:17px;line-height:2.05}.xp-figure{text-align:center;margin:12px 0 0}.xp-figure img{border:1px solid var(--xp-line);border-radius:6px;max-width:100%;max-height:320px}.xp-figure figcaption{color:var(--xp-muted);margin-top:6px;font-size:12px}.xp-evidence{cursor:pointer;text-align:inherit;white-space:inherit;overflow-wrap:anywhere;background:0 0;border:0;border-bottom:2px solid #81b6ae;border-radius:0;padding:2px 1px;transition:background .18s,border-color .18s;display:inline}.xp-evidence:hover,.xp-evidence[data-active=true]{background:var(--xp-gold-soft);border-bottom-color:var(--xp-gold)}.xp-evidence-number{color:#fff;background:var(--xp-teal);vertical-align:.12em;border-radius:50%;place-items:center;width:19px;height:19px;margin-left:3px;font-size:13px;font-weight:700;line-height:1;display:inline-grid}.xp-evidence[data-active=true] .xp-evidence-number{color:#fff;background:var(--xp-gold)}.xp-anchor-note{color:var(--xp-muted);background:#f3f7f5;border-radius:6px;align-items:flex-start;gap:8px;margin-top:18px;padding:10px 12px;font-size:11px;line-height:1.6;display:flex}.xp-anchor-note strong{color:var(--xp-teal);flex:none}.xp-options{flex-direction:column;gap:7px;display:flex}.xp-options h2{margin:0 0 2px;font-size:17px;line-height:1.6}.xp-option{border:1px solid var(--xp-line);text-align:left;background:#fff;border-radius:7px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:9px;width:100%;min-height:56px;padding:10px;display:grid}.xp-letter{overflow-wrap:anywhere;min-width:25px;max-width:60px;min-height:25px;color:var(--xp-blue);background:#edf5f8;border-radius:14px;place-items:center;padding:1px 5px;font-size:13px;font-weight:700;display:grid}.xp-option-copy{overflow-wrap:anywhere;min-width:0;font-size:14px;line-height:1.55}.xp-option-copy small{color:var(--xp-muted);margin-top:3px;font-size:12px;line-height:1.55;display:block}.xp-option-status{max-width:90px;color:var(--xp-muted);overflow-wrap:anywhere;background:#f2f5f5;border-radius:4px;padding:3px 6px;font-size:11px;line-height:1.6}.xp-option-status b{color:var(--xp-teal);margin-right:3px}.xp-option.correct{background:#eaf6ef;border-color:#b6dbc5}.xp-option.correct .xp-letter,.xp-option.correct .xp-option-status{color:var(--xp-green);background:#d8efdf}.xp-option.wrong .xp-option-status{color:#a54c3d;background:#fff0ed}.xp-option[data-active=true]{border-color:var(--xp-gold);background:var(--xp-gold-soft);box-shadow:0 0 0 2px #c692271f}.xp-brief{padding:20px}.xp-brief p{margin:0}.xp-brief-conclusion{overflow-wrap:anywhere;align-items:baseline;gap:10px;font-size:19px;font-weight:700;display:flex}.xp-brief-conclusion>strong{color:var(--xp-teal);flex:none;font-size:14px}.xp-brief-explanation{color:var(--xp-muted);white-space:pre-wrap;overflow-wrap:anywhere;font-size:17px;line-height:1.9}.xp-brief-answer{color:var(--xp-green);background:#eaf6ef;border-radius:5px;align-items:center;gap:9px;padding:9px 12px;display:flex}.xp-brief-answer>span{flex-shrink:0;font-size:13px;font-weight:700}.xp-brief-answer>strong{overflow-wrap:anywhere;text-align:center;color:#fff;background:var(--xp-green);border-radius:14px;min-width:27px;max-width:65px;padding:1px 7px}.xp-brief-answer p{color:var(--xp-ink);overflow-wrap:anywhere;font-size:13px;line-height:1.55}.xp-steps{align-items:start;gap:10px;padding:14px 16px;display:grid}.xp-step{border:1px solid var(--xp-line);cursor:pointer;background:#fff;border-radius:7px;min-width:0;padding:11px 10px;scroll-margin-top:80px;transition:background .18s,border-color .18s,box-shadow .18s}.xp-step:hover{border-color:#9ec9c2}.xp-step.active{background:var(--xp-soft);border-color:#a7d4ce;box-shadow:0 6px 16px #167a7214}.xp-step.answer:not(.active){background:#f3faf5;border-color:#b6dbc5}.xp-step-head{flex-wrap:wrap;align-items:flex-start;gap:6px;display:flex}.xp-step-select{text-align:left;background:0 0;border:0;flex:120px;align-items:flex-start;gap:8px;min-width:0;padding:0;display:flex}.xp-step-number{min-width:25px;height:25px;color:var(--xp-teal);background:#fff;border:1px solid #b7d8d3;border-radius:50%;place-items:center;line-height:1;display:grid}.xp-step.active .xp-step-number{color:#fff;border-color:var(--xp-teal);background:var(--xp-teal)}.xp-step h3{color:#3e5964;overflow-wrap:anywhere;margin:2px 0 3px;font-size:14px;font-weight:700;line-height:1.55}.xp-step.active h3{color:var(--xp-teal)}.xp-step-body{color:#49626d;overflow-wrap:anywhere;margin:3px 0 0 33px;font-size:14px;line-height:1.65}.xp-step-body p{white-space:pre-wrap;margin:0 0 4px}.xp-step-body:not(.expanded){-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.xp-why-toggle{background:#fff;border:1px solid #bddbd6;border-radius:4px;flex:none;padding:4px 6px;color:var(--xp-teal)!important;font-size:11px!important}.xp-why-toggle[aria-expanded=true]{border-color:var(--xp-teal);background:#f1faf8}.xp-why-panel{cursor:default;overflow-wrap:anywhere;background:#fff;border:1px solid #cfe4e0;border-radius:6px;margin-top:10px;padding:12px;font-size:13px;line-height:1.75}.xp-why-panel h4{color:var(--xp-teal);margin:0 0 7px;font-size:13px}.xp-why-panel p{white-space:pre-wrap;margin:0 0 8px}.xp-quote{text-align:left;background:#fff9e9;border:0;border-left:3px solid #e0b24a;border-radius:0;width:100%;margin:8px 0;padding:9px 10px;display:block;color:#5f512e!important}.xp-quote strong,.xp-quote span,.xp-quote small{display:block}.xp-quote small{margin-top:4px;font-size:11px}.xp-simple-toggle{background:#f6faff;border:1px solid #c8d9e8;border-radius:4px;padding:6px 9px;color:var(--xp-blue)!important;font-size:12px!important}.xp-simple-answer{color:#365363;background:#f1f7fb;border-radius:5px;padding:10px;margin-top:9px!important}.xp-feedback{background:0 0;border:0;margin-top:10px;padding:5px 0;display:block;color:var(--xp-muted)!important;font-size:12px!important}.xp-feedback-note{color:var(--xp-teal)}.xp-mistakes{color:#a54c3d}.xp-muted{color:var(--xp-muted)}.xp-recap{border-left:4px solid var(--xp-teal);background:#edf7f5;border-radius:6px;align-items:baseline;gap:12px;margin:0 16px 12px;padding:11px 14px;display:flex}.xp-recap strong{color:var(--xp-teal);flex:none;font-size:12px}.xp-recap p{overflow-wrap:anywhere;margin:0;font-size:13px;line-height:1.7}.xp-toolbar{color:var(--xp-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:0 16px 16px;font-size:11px;display:flex}.xp-toolbar>div{flex-wrap:wrap;gap:6px;display:flex}.xp-toolbar button{border:1px solid var(--xp-line);color:var(--xp-blue);background:#fff;border-radius:5px;padding:5px 9px}.xp-notice{border-left:3px solid var(--xp-gold);background:var(--xp-gold-soft);margin-block:12px;padding:10px 14px}.xp-notice p{margin:0}.xp-learning-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:12px;margin-top:18px;display:flex}.xp-learning-actions>p{color:var(--xp-muted);margin:0 auto 0 0}.xp-primary,.xp-secondary{border:1px solid var(--xp-teal);border-radius:6px;min-height:44px;padding:8px 18px}.xp-primary{background:var(--xp-teal);color:#fff!important}.xp-secondary{background:#fff;color:var(--xp-teal)!important}.xp-empty{padding:24px 0}@media (prefers-reduced-motion:reduce){.xp-reader *,.xp-reader :before,.xp-reader :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.pc-content.pc-content-explanation{width:min(100% - 40px,1180px);padding:18px 0 48px}.xp-pc .xp-question-layout{grid-template-columns:minmax(0,1.3fr) minmax(285px,.7fr);column-gap:22px;display:grid}.xp-pc .xp-steps{grid-template-columns:repeat(3,minmax(0,1fr))}.xp-pc .xp-step{min-height:140px}.xp-pc .xp-brief{grid-template-columns:minmax(0,1fr) minmax(245px,.45fr);align-items:center;gap:12px 22px;display:grid}.xp-pc .xp-brief-explanation{grid-column:1/-1}@media (width<=1250px){.xp-pc .xp-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.xp-pc .xp-question-layout{grid-template-columns:minmax(0,1.2fr) minmax(240px,.8fr);column-gap:16px}.xp-pc .xp-mode-hint{flex-basis:100%;order:2}}@media (width<=950px){.xp-pc .xp-question-layout{grid-template-columns:minmax(0,1fr);gap:20px}.xp-pc .xp-brief{grid-template-columns:minmax(0,1fr)}}@media (width<=650px){.xp-pc .xp-steps{grid-template-columns:minmax(0,1fr)}.pc-content.pc-content-explanation{width:calc(100% - 28px)}}.pc-help{overflow-wrap:anywhere;letter-spacing:0;line-height:1.75}.pc-help-search{gap:8px;max-width:640px;font-weight:600;display:grid}.pc-help-search input{width:100%;min-height:44px}.pc-help-count{color:var(--color-muted);font-size:14px}.pc-help-layout{grid-template-columns:200px minmax(0,1fr);align-items:start;gap:40px;display:grid}.pc-help-index{border-left:2px solid var(--color-line);display:grid;position:sticky;top:24px}.pc-help-index button{min-height:44px;color:var(--color-ink);text-align:left;font:inherit;cursor:pointer;background:0 0;border:0;padding:8px 12px}.pc-help-index button:hover{color:var(--color-primary);background:var(--color-primary-soft)}.pc-help-body{min-width:0;max-width:780px}.pc-help-section{border-bottom:1px solid var(--color-line);margin-bottom:32px;padding:0 0 32px}.pc-help-section h2{margin:0 0 20px;scroll-margin-top:24px;font-size:22px}.pc-help-section h3{margin:24px 0 12px;font-size:17px}.pc-help-section ol{margin:0 0 16px;padding-left:24px}.pc-help-section li+li{margin-top:10px}.pc-help a{color:var(--color-primary);text-underline-offset:3px;text-decoration:underline}.pc-help-footer{flex-wrap:wrap;gap:12px 24px;padding-top:16px;display:flex}@media (width<=1100px){.pc-help-layout{grid-template-columns:minmax(0,1fr);gap:24px}.pc-help-index{grid-template-columns:repeat(2,minmax(0,1fr));position:static}}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;text-rendering:optimizelegibility;--color-canvas:#f3f6f5;--color-surface:#fff;--color-ink:#17283a;--color-muted:#647d91;--color-line:#d5e1e6;--color-primary:#1d6393;--color-primary-soft:#e8f2f8;--color-accent:#287f84;--color-accent-soft:#e8f4f3;--color-recommend:#3b5bdb;--color-warning:#c77732;--color-danger:#d5634e;--color-success:#287c63;--color-admin-navy:#17364e;--color-marketing-gold:#d6a64a;--color-brand:var(--color-primary);--color-on-brand:#fff;--color-text:var(--color-ink);--color-text-muted:var(--color-muted);--color-surface-subtle:var(--color-canvas);--color-border:var(--color-line);--font-display-size:40px;--font-display-line:52px;--font-h1-size:30px;--font-h1-line:42px;--font-h2-size:24px;--font-h2-line:34px;--font-h3-size:18px;--font-h3-line:28px;--font-body-size:15px;--font-body-line:24px;--font-small-size:13px;--font-small-line:20px;--font-caption-size:12px;--font-caption-line:18px;--font-numeric-family:"Instrument Sans", "Noto Sans SC", sans-serif;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--radius-sm:6px;--radius-md:8px;--layout-desktop-max-width:1280px;--layout-mobile-width:390px;--layout-mobile-gutter:16px;--touch-target-min:44px;font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,system-ui,sans-serif}body{background:var(--color-canvas);color:var(--color-ink);margin:0}button,input,textarea,select{font:inherit}:root{--color-canvas:#f5f8f8;--color-surface:#fff;--color-ink:#163247;--color-muted:#62798a;--color-line:#d9e5ea;--color-primary:#176b78;--color-primary-soft:#e8f4f5;--color-accent:#d48745;--color-accent-soft:#fff3e9;--shadow-sm:0 2px 8px #1632470d;--shadow-md:0 12px 28px #16324714}*{box-sizing:border-box}body{background:var(--color-canvas);min-width:320px;color:var(--color-ink);margin:0}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-canvas:#142127;--color-surface:#1d2e36;--color-ink:#e7f0f2;--color-muted:#a9bdc4;--color-line:#38515b;--color-primary-soft:#244654;--color-accent-soft:#254b4b}[data-font-size=large]{--font-body-size:17px;--font-small-size:15px;--font-caption-size:13px}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.56}a{color:inherit;text-decoration:none}.eyebrow{color:var(--color-primary);font-size:var(--font-caption-size);letter-spacing:.04em;text-transform:uppercase;margin:0;font-weight:700}.page-header{margin-bottom:var(--space-6)}.page-header h1{margin:var(--space-2) 0 var(--space-2);font-size:var(--font-h1-size);line-height:var(--font-h1-line)}.page-header p:not(.eyebrow){color:var(--color-muted);margin:0}.button{min-height:var(--touch-target-min);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-4);font-weight:700;font-size:var(--font-body-size);border:1px solid #0000}.button.primary{background:var(--color-primary);color:#fff}.button.secondary{border-color:var(--color-line);background:var(--color-surface);color:var(--color-ink)}.button.full{width:100%}.button.danger{border-color:var(--color-danger);background:var(--color-danger);color:#fff}a.button{justify-content:center;align-items:center;display:inline-flex}a.button.full{display:flex}.text-button{padding:var(--space-1) var(--space-2);color:var(--color-primary);background:0 0;border:0;font-weight:600}.danger-text{color:var(--color-danger)}.tabs{gap:var(--space-1);border-bottom:1px solid var(--color-line);margin-bottom:var(--space-4);display:flex;overflow-x:auto}.tab{padding:var(--space-3) var(--space-2);color:var(--color-muted);white-space:nowrap;background:0 0;border:0;border-bottom:2px solid #0000}.tab.active{border-bottom-color:var(--color-primary);color:var(--color-primary);font-weight:700}.notice{margin:0 0 var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);font-size:var(--font-body-size)}.notice.error{color:var(--color-danger);background:#fdf1ee;border:1px solid #f0c7bd}.notice.success{color:var(--color-success);background:#eef7f3;border:1px solid #bcdfd0}.field-hint{color:var(--color-muted);font-size:var(--font-small-size);margin:-4px 0 0}.development-code{padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);font-size:var(--font-body-size);background:var(--color-accent-soft);color:var(--color-accent);margin:0}.empty-state{margin:var(--space-4) 0;color:var(--color-muted);line-height:1.6}.action-state{gap:var(--space-4);max-width:360px;display:grid}.action-state h1{color:var(--color-ink);font-size:var(--font-h2-size);margin:0}.badge{font-size:var(--font-caption-size);border-radius:999px;align-items:center;gap:4px;padding:2px 8px;font-weight:700;display:inline-flex}.badge-warning{color:var(--color-warning);background:#fbeee1}.badge-danger{color:var(--color-danger);background:#fbe7e3}.badge-recommend{color:var(--color-recommend);background:#e7eafb}.dot{font-size:var(--font-caption-size);border-radius:999px;align-items:center;gap:4px;padding:2px 8px;font-weight:700;display:inline-flex}.dot:before{content:"";background:currentColor;border-radius:50%;width:6px;height:6px}.dot-warning{color:var(--color-warning);background:#fbeee1}.dot-danger{color:var(--color-danger);background:#fbe7e3}.chip-row{gap:var(--space-2);margin:var(--space-2) 0;flex-wrap:wrap;display:flex}.chip{background:var(--color-primary-soft);color:var(--color-primary);font-size:var(--font-caption-size);border-radius:999px;padding:2px 10px;font-weight:600}.progress-track{background:var(--color-line);border-radius:999px;height:7px;overflow:hidden}.progress-track>span{border-radius:inherit;background:var(--color-accent);min-width:0;height:100%;transition:width .25s;display:block}.progress-fill{background:var(--color-accent);border-radius:999px;height:100%;display:block}.stat-card{gap:var(--space-1);padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);display:grid}.stat-card strong{font-size:var(--font-h2-size);line-height:1}.stat-card span{color:var(--color-muted);font-size:var(--font-small-size)}.brand{align-items:center;gap:var(--space-3);display:flex}.brand-mark{border-radius:var(--radius-sm);background:var(--color-primary);color:#fff;place-items:center;width:32px;height:32px;font-weight:700;display:grid}.topbar{justify-content:space-between;align-items:center;gap:var(--space-4);min-height:64px;padding:0 var(--space-8);background:var(--color-surface);border-bottom:1px solid var(--color-line);display:flex}.topbar-actions{align-items:center;gap:var(--space-3);display:flex}.topbar-note,.user-phone,.field-label,.cycle-code{color:var(--color-muted);font-size:var(--font-small-size)}.auth-page{background:var(--color-canvas);min-height:100vh}.auth-layout{grid-template-columns:minmax(0,1.1fr) minmax(360px,.8fr);align-items:center;gap:80px;width:min(100% - 64px,1000px);min-height:calc(100vh - 64px);margin:0 auto;display:grid}.auth-intro h1{margin:var(--space-2) 0 var(--space-4);font-size:var(--font-display-size);font-weight:720;line-height:1.18}.auth-intro>p:last-child{max-width:400px;color:var(--color-muted);margin:0;line-height:1.7}.auth-form{gap:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);padding:28px;display:grid}.auth-form label{color:var(--color-ink);font-size:var(--font-body-size);gap:7px;font-weight:700;display:grid}.auth-form input,.cycle-band select{border:1px solid var(--color-line);border-radius:var(--radius-sm);background:var(--color-surface);width:100%;min-height:42px;color:var(--color-ink);padding:8px 10px}.verification-row{gap:var(--space-3);grid-template-columns:minmax(0,1fr) auto;align-items:end;display:grid}.verification-button{white-space:nowrap}.onboarding-page{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-md);width:min(100% - 48px,680px);margin:12vh auto;padding:40px}.pc-shell{background:var(--color-canvas);min-height:100vh}.pc-sidenav{z-index:10;border-right:1px solid var(--color-line);background:var(--color-surface);flex-direction:column;width:264px;padding:28px 16px 20px;display:flex;position:fixed;inset:0 auto 0 0}.sidenav-head{padding:0 8px}.brand-copy{gap:1px;display:grid}.brand-copy strong{line-height:1.25}.brand-copy small{color:var(--color-muted);font-size:var(--font-caption-size);font-weight:500}.sidenav-section-label{color:var(--color-muted);font-size:var(--font-caption-size);letter-spacing:.08em;margin:40px 12px 10px;font-weight:700}.sidenav-nav{gap:4px;display:grid}.nav-link{justify-content:space-between;align-items:center;gap:var(--space-2);border-radius:var(--radius-sm);min-height:44px;color:var(--color-ink);padding:10px 12px;font-weight:650;transition:background-color .16s,color .16s;display:flex}.nav-link:hover{background:var(--color-canvas)}.nav-link.active{background:var(--color-primary-soft);color:var(--color-primary)}.nav-link-label{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.nav-badge{background:var(--color-warning);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:11px;font-weight:700;line-height:1;display:inline-flex}.mailbox-link{border-radius:var(--radius-sm);width:36px;height:36px;color:var(--color-muted);place-items:center;transition:background-color .16s,color .16s;display:grid;position:relative}.mailbox-link:hover{background:var(--color-canvas);color:var(--color-ink)}.mailbox-link.has-unread{color:var(--color-ink)}.mailbox-badge{min-width:17px;height:17px;box-shadow:0 0 0 2px var(--color-surface);padding:0 4px;font-size:10px;position:absolute;top:1px;right:0}.sidenav-footnote{border-top:1px solid var(--color-line);color:var(--color-muted);font-size:var(--font-caption-size);align-items:center;gap:8px;margin:auto 12px 0;padding-top:18px;display:flex}.sidenav-footnote-dot{background:var(--color-accent);border-radius:50%;flex:none;width:7px;height:7px}.pc-main{flex-direction:column;min-width:0;min-height:100vh;margin-left:264px;display:flex}.pc-content{width:min(100% - 80px, var(--layout-desktop-max-width));flex:1;margin:0 auto;padding:40px 0 72px}.topbar-context{align-items:baseline;gap:10px;min-width:0;display:flex}.topbar-context strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.topbar-separator{color:var(--color-line)}.user-avatar{background:var(--color-primary-soft);width:30px;height:30px;color:var(--color-primary);font-size:var(--font-small-size);border-radius:50%;place-items:center;font-weight:700;display:grid}.user-name{font-weight:650}.auth-restoring{min-height:100vh;color:var(--color-muted);place-items:center;display:grid}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:2px;outline:3px solid #287f8447}.cycle-band{justify-content:space-between;gap:var(--space-6);padding:var(--space-4) 0;border-top:1px solid var(--color-line);border-bottom:1px solid var(--color-line);margin-bottom:var(--space-6);align-items:center;display:flex}.cycle-band>div{gap:4px;display:grid}.cycle-band select{width:190px}.primary-task-card{border:1px solid var(--color-line);border-left:3px solid var(--color-primary);border-radius:var(--radius-md);background:var(--color-surface);margin-bottom:var(--space-8);padding:28px 32px 32px;box-shadow:0 6px 18px #17283a0a}.primary-task-card h2{margin:var(--space-1) 0 var(--space-2);font-size:var(--font-h2-size)}.primary-task-reason{margin:0 0 var(--space-4);color:var(--color-muted);line-height:1.6}.primary-task-meta{border-top:1px solid var(--color-line);border-bottom:1px solid var(--color-line);grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0 0 24px;padding:16px 0;display:grid}.primary-task-meta div{gap:4px;min-width:0;display:grid}.primary-task-meta dt{color:var(--color-muted);font-size:var(--font-caption-size)}.primary-task-meta dd{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-size:var(--font-small-size);margin:0;font-weight:700;overflow:hidden}.today-stats-grid{gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(140px,1fr));display:grid}.topic-group{margin-bottom:var(--space-8)}.topic-group h2{margin:0 0 var(--space-4);font-size:var(--font-h3-size)}.topic-card-grid{gap:var(--space-4);grid-template-columns:repeat(auto-fill,minmax(240px,1fr));display:grid}.topic-card{gap:var(--space-2);padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);display:grid}.topic-card-head{justify-content:space-between;align-items:center;gap:var(--space-2);display:flex}.topic-card-head strong{font-size:var(--font-body-size)}.ability-tag{color:var(--color-muted);font-size:var(--font-small-size)}.topic-card-meta{color:var(--color-muted);font-size:var(--font-caption-size);justify-content:space-between;display:flex}.practice-status-bar{margin-bottom:var(--space-6);justify-content:space-between;align-items:center;font-weight:700;display:flex}.practice-status-actions{align-items:center;gap:var(--space-2);font-weight:400;display:flex}.question-panel{max-width:720px}.question-context{align-items:center;gap:var(--space-3);color:var(--color-muted);font-size:var(--font-small-size);flex-wrap:wrap;display:flex}.question-context .practice-status-actions{margin-left:auto}.question-stem{margin:var(--space-4) 0 var(--space-6);font-size:var(--font-h2-size);white-space:pre-wrap;overflow-wrap:anywhere;font-weight:650;line-height:1.5}.question-figure{margin:0 0 var(--space-6);text-align:center}.question-figure img{border:1px solid var(--color-line);border-radius:var(--radius-md);max-width:100%;max-height:360px}.question-figure figcaption{margin-top:var(--space-2);color:var(--color-muted);font-size:var(--font-small-size)}.option-list{gap:var(--space-3);display:grid}.option{align-items:center;gap:var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-sm);width:100%;min-height:58px;padding:var(--space-3) var(--space-4);background:var(--color-surface);color:var(--color-ink);text-align:left;grid-template-columns:28px minmax(0,1fr);display:grid}.option.selected{border-color:var(--color-primary);background:var(--color-primary-soft)}.option-label{border:1px solid var(--color-muted);width:24px;height:24px;color:var(--color-muted);font-size:var(--font-caption-size);border-radius:50%;place-items:center;font-weight:700;display:grid}.selected .option-label{border-color:var(--color-primary);background:var(--color-primary);color:#fff}.submit-button{margin-top:var(--space-6);min-width:150px}.micro-practice-button{margin-left:var(--space-3)}.practice-status-context{align-items:center;gap:var(--space-3);display:flex}.question-clock{font-variant-numeric:tabular-nums;color:var(--color-muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:600}.option:disabled{opacity:1}.option.answered-correct{border-color:var(--color-success);background:#e6f2ed}.option.answered-wrong{border-color:var(--color-danger);background:#fbeae6}.answered-correct .option-label{border-color:var(--color-success);background:var(--color-success);color:#fff}.answered-wrong .option-label{border-color:var(--color-danger);background:var(--color-danger);color:#fff}.answer-flash{margin:var(--space-6) 0 0;font-weight:700}.answer-flash.correct{color:var(--color-success)}.answer-flash.wrong{color:var(--color-danger)}.exit-confirm{gap:var(--space-4);padding:var(--space-4);border-radius:var(--radius-md);margin-bottom:var(--space-6);background:#fdf1ee;border:1px solid #f0c7bd;display:grid}.exit-confirm-copy p{margin:var(--space-1) 0 0;color:var(--color-muted);line-height:1.6}.exit-confirm-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}@media (hover:hover){.option:not(:disabled):hover{border-color:var(--color-primary);background:var(--color-primary-soft)}}.attempt-banner{justify-content:space-between;align-items:center;gap:var(--space-4);padding:var(--space-4);border-radius:var(--radius-md);margin-bottom:var(--space-6);background:var(--color-accent-soft);color:var(--color-accent);display:flex}.attempt-banner.negative{color:var(--color-warning);background:#fbeee1}.attempt-banner-meta{align-items:center;gap:var(--space-4);display:flex}.explanation-title{margin:0 0 var(--space-4);font-size:var(--font-h2-size)}.explanation-steps{margin:0 0 var(--space-4);gap:var(--space-4);padding:0;list-style:none;display:grid}.explanation-step{padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface)}.explanation-step-head{align-items:center;gap:var(--space-2);color:var(--color-muted);font-size:var(--font-caption-size);margin-bottom:var(--space-1);display:flex}.step-index{background:var(--color-primary-soft);width:20px;height:20px;color:var(--color-primary);border-radius:50%;place-items:center;font-weight:700;display:grid}.explanation-step h3{margin:0 0 var(--space-2);font-size:var(--font-body-size)}.explanation-block{margin:0 0 var(--space-2);color:var(--color-ink);white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.6}.explanation-hint{margin:0 0 var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);background:var(--color-primary-soft);color:var(--color-primary)}.explanation-common-errors{margin:var(--space-2) 0;color:var(--color-danger);font-size:var(--font-small-size)}.explanation-controls{gap:var(--space-3);margin-bottom:var(--space-6);display:flex}.explanation-conclusion{padding:var(--space-4);border-radius:var(--radius-md);background:var(--color-accent-soft);color:var(--color-accent);margin-bottom:var(--space-6)}.option-explanations{margin-bottom:var(--space-6)}.option-explanations h2{margin:0 0 var(--space-3);font-size:var(--font-h3-size)}.option-explanation{gap:var(--space-3);padding:var(--space-2) 0;border-bottom:1px solid var(--color-line);grid-template-columns:minmax(0,1fr) minmax(0,2fr);display:grid}.option-explanation-text,.option-explanation-reason{overflow-wrap:anywhere;min-width:0}.option-explanation.correct .option-explanation-text{color:var(--color-success)}.option-explanation.wrong .option-explanation-text{color:var(--color-danger)}.explanation-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.review-list-panel{gap:var(--space-4);display:grid}.review-more-links{margin:var(--space-4) 0 0;color:var(--color-muted);font-size:var(--font-small-size)}.review-more-links a{color:var(--color-primary);font-weight:600;text-decoration:underline}.review-list{gap:var(--space-3);display:grid}.review-row{align-items:start;gap:var(--space-6);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);grid-template-columns:minmax(0,1fr) auto;min-width:0;padding:18px 20px;display:grid}.review-row:hover{border-color:#b9cdd6;box-shadow:0 4px 14px #17283a0d}.review-row-main{gap:10px;min-width:0;display:grid}.review-row-title{overflow-wrap:anywhere;min-width:0;font-size:var(--font-body-size);font-weight:700;line-height:1.55}.review-row-meta{min-width:0;color:var(--color-muted);font-size:var(--font-small-size);line-height:var(--font-small-line);flex-wrap:wrap;align-items:center;gap:6px 14px;display:flex}.review-row-meta span{min-width:0}.review-row-status{justify-items:end;gap:10px;min-width:84px;display:grid}.review-row-action{white-space:nowrap}.review-row-action.button{min-height:36px;font-size:var(--font-small-size);padding:6px 12px}.progress-topbar{margin-bottom:var(--space-6);grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;display:grid}.progress-topbar .stat-card{align-content:center;min-height:92px}.progress-list{gap:4px;display:grid}.progress-row{border-bottom:1px solid var(--color-line);gap:10px;padding:18px 0;display:grid}.progress-row:last-child{border-bottom:0}.progress-row-head{justify-content:space-between;align-items:start;gap:var(--space-4);display:flex}.progress-row-title{gap:3px;min-width:0;display:grid}.progress-row-subtitle,.progress-row-meta{color:var(--color-muted);font-size:var(--font-small-size)}.progress-row-score{font-variant-numeric:tabular-nums}.progress-row-meta{line-height:var(--font-small-line);flex-wrap:wrap;gap:6px 18px;display:flex}.progress-overview{gap:var(--space-8);border-bottom:1px solid var(--color-line);grid-template-columns:minmax(0,1fr) minmax(280px,.8fr);align-items:center;padding:20px 0 24px;display:grid}.progress-overview-main{gap:8px;max-width:520px;display:grid}.progress-overview-main>strong{font-variant-numeric:tabular-nums;font-size:32px;line-height:1}.section-kicker{color:var(--color-muted);font-size:var(--font-caption-size);letter-spacing:.05em;font-weight:700}.progress-stage-summary{color:var(--color-muted);font-size:var(--font-small-size);grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.progress-stage-summary span{border-left:2px solid var(--color-line);gap:4px;padding-left:12px;display:grid}.progress-stage-summary strong{color:var(--color-ink);font-size:20px;line-height:1}.view-intro{justify-content:space-between;align-items:end;gap:var(--space-6);border-bottom:1px solid var(--color-line);padding:4px 0 18px;display:flex}.view-intro h2{font-size:var(--font-h3-size);margin:4px 0 0}.view-intro p{max-width:520px;color:var(--color-muted);font-size:var(--font-small-size);text-align:right;margin:0;line-height:1.6}.dimension-name-wrap{gap:3px;min-width:0;display:grid}.daily-list{display:grid}.daily-row{gap:var(--space-4);border-bottom:1px solid var(--color-line);grid-template-columns:72px minmax(0,1fr) 56px;align-items:center;padding:14px 0;display:grid}.daily-row:last-child{border-bottom:0}.daily-row time{color:var(--color-muted);font-size:var(--font-small-size)}.daily-row-main{gap:6px;min-width:0;display:grid}.daily-row-head{justify-content:space-between;gap:var(--space-3);font-size:var(--font-small-size);display:flex}.daily-row-head span{color:var(--color-muted)}.daily-change{text-align:right;font-size:var(--font-small-size);font-variant-numeric:tabular-nums}.daily-change.positive{color:var(--color-success)}.daily-change.negative{color:var(--color-danger)}.tree-legend{color:var(--color-muted);font-size:var(--font-small-size);flex-wrap:wrap;gap:12px 20px;padding:14px 0;display:flex}.tree-legend-item{align-items:center;gap:6px;display:inline-flex}.legend-dot{background:var(--color-line);border-radius:50%;flex:none;width:8px;height:8px;display:inline-block}.legend-dot.not-started{background:#b9c7ce}.legend-dot.forming{background:var(--color-warning)}.legend-dot.near{background:var(--color-primary)}.legend-dot.mastered{background:var(--color-success)}.profile-card{padding:var(--space-4);border-radius:var(--radius-md);background:var(--color-surface);border:1px solid var(--color-line);margin-bottom:var(--space-4);gap:4px;display:grid}.profile-card span{color:var(--color-muted);font-size:var(--font-small-size)}.profile-links{gap:var(--space-6);margin-bottom:var(--space-6);display:grid}.profile-settings{gap:var(--space-4);margin-bottom:var(--space-6);display:flex}.profile-settings label{gap:var(--space-1);color:var(--color-muted);font-size:var(--font-small-size);display:grid}.profile-settings select{border:1px solid var(--color-line);border-radius:var(--radius-sm);background:var(--color-surface);min-height:40px;color:var(--color-ink);padding:6px 10px}.profile-link-group{gap:var(--space-2);display:grid}.profile-link-kicker{color:var(--color-muted);font-size:var(--font-caption-size);letter-spacing:.04em;font-weight:700}.profile-link{justify-content:space-between;align-items:center;gap:var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-sm);background:var(--color-surface);padding:14px 16px;font-weight:650;transition:border-color .16s,background-color .16s;display:flex}.profile-link:hover{background:#fbfdfd;border-color:#b9cdd6}.profile-link span{color:var(--color-primary);font-size:18px;line-height:1}.message-summary{justify-content:space-between;align-items:center;gap:var(--space-4);padding-bottom:var(--space-3);border-bottom:1px solid var(--color-line);color:var(--color-muted);display:flex}.message-summary strong{color:var(--color-ink)}.message-list{border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);display:grid;overflow:hidden}.message-item+.message-item{border-top:1px solid var(--color-line)}.message-item.unread{border-left:3px solid var(--color-primary)}.message-trigger{justify-content:space-between;align-items:center;gap:var(--space-5);width:100%;min-height:64px;padding:14px var(--space-5);color:var(--color-ink);text-align:left;cursor:pointer;background:0 0;border:0;display:flex}.message-trigger:hover{background:var(--color-canvas)}.message-title-wrap{overflow-wrap:anywhere;align-items:center;gap:10px;min-width:0;display:flex}.message-trigger time{color:var(--color-muted);font-size:var(--font-small-size);flex:none}.message-unread-dot{background:var(--color-primary);border-radius:50%;flex:none;width:8px;height:8px}.message-body{gap:var(--space-3);padding:0 var(--space-5) var(--space-5) 38px;display:grid}.message-body p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;line-height:1.75}.message-body span{color:var(--color-muted);font-size:var(--font-caption-size)}.message-pager{justify-content:center;align-items:center;gap:var(--space-4);color:var(--color-muted);font-size:var(--font-small-size);display:flex}.subnav-tabs{margin:-8px 0 var(--space-6);border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);align-items:center;gap:4px;width:fit-content;max-width:100%;padding:4px;display:flex;overflow-x:auto}.subnav-tab{min-height:36px;color:var(--color-muted);font-size:var(--font-small-size);white-space:nowrap;border-radius:4px;align-items:center;gap:6px;padding:7px 14px;font-weight:650;display:inline-flex}.subnav-tab:hover{color:var(--color-ink);background:var(--color-canvas)}.subnav-tab.active{background:var(--color-primary);color:#fff}@media (width<=1100px){.pc-sidenav{width:224px}.pc-main{margin-left:224px}.pc-content{width:min(100% - 48px, var(--layout-desktop-max-width))}.progress-topbar{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=900px){.pc-sidenav{display:none}.pc-main{margin-left:0}.pc-content{width:min(100% - 40px, var(--layout-desktop-max-width))}.progress-topbar{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-overview{gap:var(--space-6);grid-template-columns:1fr}.view-intro{flex-direction:column;align-items:start}.view-intro p{text-align:left;max-width:none}}@media (width<=760px){.topbar{min-height:56px;padding:0 var(--space-4)}.topbar-actions .user-phone,.topbar-actions .user-name{display:none}.auth-layout{grid-template-columns:1fr;align-content:center;gap:28px;width:min(100% - 32px,480px);padding:32px 0}.auth-intro h1{font-size:var(--font-h1-size)}.auth-form{padding:20px}.verification-row{grid-template-columns:1fr}.verification-button{width:100%}.cycle-band{align-items:stretch;gap:var(--space-3);grid-template-columns:1fr;display:grid}.cycle-band select{width:100%}.question-stem{font-size:var(--font-h3-size)}.pc-content{width:min(100% - 32px, var(--layout-desktop-max-width));padding-top:24px}.primary-task-card{padding:22px 20px 24px}.primary-task-meta{grid-template-columns:repeat(2,minmax(0,1fr))}.progress-topbar{gap:8px}.progress-topbar .stat-card{padding:12px}.review-row{grid-template-columns:1fr;gap:12px}.review-row-status{justify-content:space-between;align-items:center;display:flex}.dimension-row{grid-template-columns:1fr auto;gap:8px 12px}.dimension-row .progress-track{grid-area:2/1/auto/-1}.dimension-row>.muted{grid-column:1/-1}.daily-row{grid-template-columns:54px minmax(0,1fr) 46px;gap:10px}}.page{gap:var(--space-6);display:grid}.account-page{display:grid}.page-header{gap:var(--space-2);display:grid}.page-note{color:var(--color-muted);font-size:var(--font-caption-size)}.card{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-md);padding:var(--space-6);gap:var(--space-4);display:grid;box-shadow:0 2px 8px #17283a06}.inline-form{gap:var(--space-3);flex-wrap:wrap;align-items:end;display:flex}.inline-form input{min-width:220px;padding:var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-md)}.inline-form label{gap:var(--space-2);font-size:var(--font-caption-size);color:var(--color-muted);display:grid}.inline-form label input{min-width:120px}.wallet-balance{justify-items:start}.wallet-amount{font-variant-numeric:tabular-nums;font-size:34px}.redeem-preview{justify-content:space-between;align-items:center;gap:var(--space-4);padding:var(--space-4);border:1px dashed var(--color-line);border-radius:var(--radius-md);display:flex}.data-table{border-collapse:collapse;width:100%;font-size:var(--font-body-size)}.data-table th{text-align:left;color:var(--color-muted);padding:var(--space-2) var(--space-3);border-bottom:1px solid var(--color-line);font-weight:600}.data-table td{padding:var(--space-3);border-bottom:1px solid var(--color-line);vertical-align:middle}.data-table tr:last-child td{border-bottom:none}.amount-credit{color:var(--color-success,#1b7f4d)}.amount-debit{color:var(--color-danger,#b3261e)}.order-no{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.row-actions{gap:var(--space-3);align-items:center;display:flex}.button.small{padding:var(--space-2) var(--space-3);font-size:var(--font-caption-size)}.product-grid{gap:var(--space-4);grid-template-columns:repeat(auto-fill,minmax(260px,1fr));display:grid}.product-card{align-content:start}.product-price{font-size:26px;font-weight:700}.product-group-price{color:var(--color-muted);font-size:var(--font-caption-size)}.quote-panel{max-width:520px}.quote-table td{padding:var(--space-2) var(--space-3)}.quote-amount{text-align:right;font-variant-numeric:tabular-nums}.quote-total td{border-top:1px solid var(--color-line);font-weight:700}.quote-actions{gap:var(--space-3);align-items:center;display:flex}.group-code-panel{border-color:var(--color-primary)}.group-code{letter-spacing:2px;padding:var(--space-4);background:var(--color-canvas);border-radius:var(--radius-md);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:20px;display:block}.plan-summary{justify-content:start;gap:var(--space-8);grid-auto-flow:column;align-items:center}.focus-list{gap:var(--space-3);display:grid}.focus-list li{gap:var(--space-3);align-items:center;display:flex}.muted{color:var(--color-muted);font-size:var(--font-caption-size)}.product-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.assessment-status{align-items:center;gap:var(--space-6);grid-auto-flow:column}.assessment-actions{gap:var(--space-4);margin-left:auto;display:flex}.assessment-question{gap:var(--space-3);padding:var(--space-4) 0;border-bottom:1px solid var(--color-line);display:grid}.assessment-question:last-of-type{border-bottom:none}.question-index{color:var(--color-muted);font-size:var(--font-caption-size)}.dimension-list{gap:var(--space-4);display:grid}.dimension-row{gap:var(--space-4);grid-template-columns:120px minmax(120px,1fr) 56px auto;align-items:center;display:grid}.dimension-name{font-weight:600}.dimension-score{text-align:right;font-variant-numeric:tabular-nums}.knowledge-tree{gap:var(--space-2);display:grid}.knowledge-tree ul{gap:var(--space-2);margin-left:var(--space-6);margin-top:var(--space-2);display:grid}.tree-node-row{gap:var(--space-3);grid-template-columns:minmax(140px,1fr) auto auto 140px auto;align-items:center;display:grid}.tree-node-name{font-weight:600}.progress-track.small{height:6px}.filter-row{gap:var(--space-3);display:flex}.commerce-filters{gap:var(--space-3);margin-bottom:var(--space-4);grid-template-columns:minmax(180px,240px) minmax(180px,1fr);align-items:end;display:grid}.commerce-filters label{gap:6px;min-width:0;display:grid}.commerce-filters select,.commerce-filters input{box-sizing:border-box;border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-surface);width:100%;min-width:0;min-height:40px;color:var(--color-ink);padding:8px 10px}.commerce-filters p{grid-column:1/-1;margin:0}.chip.active{background:var(--color-primary);color:#fff}.chip.correct{color:#1b7f4d;background:#e7f4ec}.chip.wrong{color:#b3261e;background:#fdeaea}.chip.attention{color:#a35b00;background:#fff4e0}.record-list{gap:var(--space-4);display:grid}.record-head{gap:var(--space-3);flex-wrap:wrap;align-items:center;display:flex}.record-head .text-button{margin-left:auto}.record-stem{font-size:var(--font-body-size);color:inherit;text-decoration:none;display:block}.record-stem:hover,.record-stem:focus-visible{text-decoration:underline}.record-card a.text-button{text-decoration:none}.inline-form select{padding:var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-md)}.pc-compact-menu{display:none;position:relative}.pc-compact-menu summary{cursor:pointer;padding:12px}.pc-compact-menu nav{z-index:30;background:var(--color-surface);border:1px solid var(--color-line);border-radius:8px;width:200px;padding:8px;display:grid;position:absolute;top:100%;left:0;box-shadow:0 8px 24px #0002}.pc-compact-menu nav a{padding:12px}@media (width<=900px){.pc-compact-menu{display:block}}.answer-feedback-dialog{box-sizing:border-box;background:var(--color-surface);width:min(460px,100vw - 40px);max-height:calc(100dvh - 40px);color:var(--color-ink);border:0;border-radius:20px;padding:28px;overflow:auto;box-shadow:0 20px 80px #0000003d}.answer-feedback-dialog::backdrop{background:#0f172a7a}.answer-feedback-dialog h2{margin:0 0 12px;font-size:22px}.answer-feedback-dialog p{line-height:1.7}.answer-feedback-actions{flex-wrap:wrap;gap:12px;margin-top:24px;display:flex}.answer-feedback-actions .button{min-height:44px}.question-passage,.explanation-passage{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.85}.explanation-source{border:1px solid var(--color-line);border-radius:var(--radius-md);padding:var(--space-4);margin-bottom:var(--space-4);overflow-wrap:anywhere;scroll-margin-top:80px}.explanation-source h2{font-size:var(--font-h3-size)}.explanation-source mark{color:#342509;background:#fff0ac}.explanation-support{margin-block:var(--space-3)}.explanation-support summary{cursor:pointer;padding-block:12px}.explanation-citations{gap:var(--space-2);margin-block:var(--space-3);display:grid}.evidence-button{text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;border:1px solid var(--color-line);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-ink);min-height:44px;font:inherit;cursor:pointer;padding:12px}.evidence-button[aria-pressed=true]{border-color:var(--color-primary);background:var(--color-primary-soft)}.explanation-step-options{border-left:3px solid var(--color-line);padding-left:var(--space-3)}.practice-submit-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:24px;display:flex}.practice-submit-actions>.button{border-radius:var(--radius-sm);justify-content:center;align-items:center;gap:4px;min-width:150px;min-height:44px;margin:0;padding:10px 18px;line-height:22px;display:inline-flex}.legal-page{width:min(100% - 48px,860px);margin:0 auto;padding:48px 0 72px;line-height:1.8}.legal-page>a{color:var(--color-primary)}.legal-page h1{margin:0;font-size:36px}.legal-page h2{margin:28px 0 4px;font-size:20px}.legal-page article{overflow-wrap:anywhere;min-width:0}.legal-page article p{white-space:pre-wrap;margin:12px 0}.legal-page h3{margin:20px 0 4px;font-size:17px}.legal-page strong{font-weight:700}.legal-updated{white-space:pre-line}.legal-table-scroll{max-width:100%;margin:20px 0;overflow-x:auto}.legal-page table{border-collapse:collapse;width:100%;min-width:640px;font-size:14px}.legal-page th,.legal-page td{border:1px solid var(--color-border);text-align:left;vertical-align:top;white-space:pre-wrap;padding:12px}.legal-page th{font-weight:700}.legal-updated,.legal-record{color:var(--color-muted);font-size:var(--font-caption-size)}@media (width<=760px){.legal-page{width:min(100% - 32px,860px);padding:24px 0 48px}.legal-page h1{font-size:28px}}.policy-consent{font-size:var(--font-caption-size);grid-template-columns:auto 1fr;align-items:flex-start;gap:8px;line-height:1.5;display:flex}.policy-consent input{flex:none;width:16px;height:16px;margin-top:2px}.policy-consent a{color:var(--color-primary)}body{background:linear-gradient(145deg,#f7faf9 0%,#f2f6f7 100%)}.pc-shell{background:0 0}.pc-sidenav{box-shadow:8px 0 24px #16324709}.topbar{z-index:5;position:sticky;top:0;box-shadow:0 1px #1632470a,0 6px 18px #16324709}.page-header h1{letter-spacing:-.02em}.card,.stat-card,.profile-card,.topic-card,.primary-task-card,.review-row,.message-list{box-shadow:var(--shadow-sm);transition:box-shadow .2s,border-color .2s,transform .2s}.card:hover,.stat-card:hover,.topic-card:hover{box-shadow:var(--shadow-md);border-color:#b9d2d8}.button{transition:transform .16s,box-shadow .16s,background-color .16s}.button.primary{background:linear-gradient(135deg,#176b78,#1f8290);box-shadow:0 5px 12px #176b7833}.button.primary:hover{transform:translateY(-1px);box-shadow:0 8px 18px #176b7840}.button.secondary:hover{background:#f7fbfb;border-color:#a9c5cc}.nav-link{justify-content:flex-start}.nav-link-icon{width:24px;color:var(--color-muted);display:inline-flex}.nav-link.active .nav-link-icon{color:var(--color-primary)}.nav-link .nav-badge{margin-left:auto}.brand-mark{background:#e8f4f5;overflow:hidden}.brand-mark img{object-fit:contain;width:100%;height:100%}