:root{--ink: #10201c;--ink-soft: #1c332c;--panel: rgba(255, 250, 242, .92);--panel-strong: #fffaf2;--line: rgba(16, 32, 28, .12);--muted: #5d6f68;--text: #182722;--accent: #b7791f;--accent-deep: #8a5a12;--signal: #1f7a57;--danger: #a33b2c;--hero-a: #0d2a24;--hero-b: #1a4638;--hero-c: #c49a3a;--shadow: 0 24px 60px rgba(10, 24, 20, .18);--radius: 18px;--font-display: "Noto Serif SC", "Songti SC", serif;--font-ui: "Sora", "Noto Sans SC", sans-serif;--font-body: "Noto Sans SC", "PingFang SC", sans-serif}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;color:var(--text);font-family:var(--font-body);background:radial-gradient(circle at 12% 8%,rgba(183,121,31,.12),transparent 28%),radial-gradient(circle at 88% 0%,rgba(31,122,87,.14),transparent 30%),linear-gradient(180deg,#f4efe4,#ebe4d6 48%,#e5efe8)}button,input,select{font:inherit}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 28px;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f4efe4c7;border-bottom:1px solid var(--line)}.brand-lockup{display:flex;align-items:baseline;gap:10px}.brand-lockup strong{font-family:var(--font-display);font-size:1.35rem;letter-spacing:.04em}.brand-lockup span{color:var(--muted);font-size:.85rem}.nav-links{display:flex;gap:8px;flex-wrap:wrap}.nav-links button{border:0;background:transparent;color:var(--muted);padding:8px 12px;border-radius:999px;cursor:pointer;transition:color .2s ease,background .2s ease,transform .2s ease}.nav-links button:hover{color:var(--text);transform:translateY(-1px)}.nav-links button.active{background:var(--ink);color:#fffaf2}.page{width:min(1120px,calc(100% - 40px));margin:0 auto;padding:28px 0 72px}.hero{position:relative;overflow:hidden;min-height:min(78vh,760px);border-radius:28px;color:#f7f3ea;background:radial-gradient(circle at 78% 22%,rgba(196,154,58,.28),transparent 24%),linear-gradient(135deg,var(--hero-a),var(--hero-b) 55%,#12352c 100%);box-shadow:var(--shadow);isolation:isolate}.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 85%);mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 85%);pointer-events:none}.hero:after{content:"";position:absolute;right:-8%;bottom:-18%;width:58%;height:78%;background:radial-gradient(circle at 40% 30%,rgba(255,250,242,.16),transparent 40%),linear-gradient(160deg,rgba(255,250,242,.08),transparent 60%);border:1px solid rgba(255,250,242,.12);border-radius:40% 60% 48% 52%;transform:rotate(-8deg);animation:drift 12s ease-in-out infinite alternate;pointer-events:none}.hero-inner{position:relative;z-index:1;display:flex;flex-direction:column;justify-content:flex-end;gap:18px;min-height:inherit;padding:48px 48px 56px}.hero-brand{font-family:var(--font-display);font-size:clamp(3.4rem,8vw,6.4rem);line-height:1;letter-spacing:.08em;margin:0;animation:rise .8s ease both}.hero-lead{max-width:34rem;margin:0;font-size:1.08rem;line-height:1.7;color:#f7f3ead6;animation:rise .9s ease .08s both}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;animation:rise 1s ease .16s both}.btn{appearance:none;border:0;border-radius:999px;padding:12px 20px;cursor:pointer;font-family:var(--font-ui);font-weight:600;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,#d6a84a,#b7791f);color:#1a1408;box-shadow:0 10px 24px #b7791f47}.btn-ghost{background:#fffaf21a;color:#fffaf2;border:1px solid rgba(255,250,242,.24)}.btn-ink{background:var(--ink);color:#fffaf2}.btn-light{background:var(--panel-strong);color:var(--text);border:1px solid var(--line)}.section{margin-top:36px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}.section-head h2{margin:0;font-family:var(--font-display);font-size:1.8rem}.section-head p{margin:6px 0 0;color:var(--muted)}.grid{display:grid;gap:14px}.category-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 16px;box-shadow:0 10px 28px #10201c0d}.category-card{text-align:left;cursor:pointer;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.category-card:hover{transform:translateY(-3px);border-color:#b7791f59;box-shadow:0 16px 32px #10201c14}.category-card strong{display:block;font-size:1.02rem;line-height:1.45;margin-bottom:10px}.meta{color:var(--muted);font-size:.88rem}.stat-value{font-family:var(--font-ui);font-size:2rem;font-weight:700;margin:0 0 4px}.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}.field,.select{flex:1;min-width:180px;border:1px solid var(--line);background:var(--panel-strong);border-radius:14px;padding:12px 14px;outline:none}.field:focus,.select:focus{border-color:#b7791f8c;box-shadow:0 0 0 3px #b7791f1f}.quiz-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:18px}.side-panel{position:sticky;top:84px;align-self:start}.progress-bar{height:8px;border-radius:999px;background:#10201c14;overflow:hidden;margin:12px 0 18px}.progress-bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--signal),#3f9d74);transition:width .35s ease}.question-card{animation:rise .35s ease both}.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:.78rem;background:#10201c0f;color:var(--muted)}.badge.accent{background:#b7791f24;color:var(--accent-deep)}.stem{margin:0 0 18px;font-family:var(--font-display);font-size:1.35rem;line-height:1.65}.options{display:grid;gap:10px}.option{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:14px 16px;cursor:pointer;transition:border-color .18s ease,transform .18s ease,background .18s ease}.option:hover{transform:translateY(-1px);border-color:#1f7a5759}.option.selected{border-color:#1f7a578c;background:#1f7a5714}.option.correct{border-color:#1f7a57b3;background:#1f7a571f}.option.wrong{border-color:#a33b2c8c;background:#a33b2c14}.option-mark{flex:0 0 auto;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#10201c0f;font-family:var(--font-ui);font-weight:700}.feedback{margin-top:16px;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:#fffaf2e6;animation:rise .3s ease both}.feedback.ok{border-color:#1f7a5747}.feedback.bad{border-color:#a33b2c47}.feedback h3{margin:0 0 8px;font-size:1rem}.feedback p{margin:0;color:var(--muted);line-height:1.7}.reference{margin-top:12px;padding-top:12px;border-top:1px dashed rgba(36,48,42,.14)}.reference-label{font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}.reference-doc{margin:0 0 8px;color:var(--ink);font-weight:600;line-height:1.55;font-size:.92rem}.reference-excerpt{margin:0;padding:10px 12px;border-left:3px solid rgba(31,122,87,.55);background:#1f7a570f;color:var(--muted);line-height:1.7;font-size:.92rem;white-space:pre-wrap}.actions-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.result-list,.search-list,.material-list{display:grid;gap:12px}.result-item,.material-item{transition:transform .18s ease}.result-item:hover,.material-item:hover{transform:translateY(-2px)}.result-item h3,.material-item h3{margin:0 0 8px;font-size:1.05rem;line-height:1.55}.empty{padding:40px 20px;text-align:center;color:var(--muted)}.loading{min-height:60vh;display:grid;place-items:center;color:var(--muted)}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 18% 20%,rgba(183,121,31,.18),transparent 28%),linear-gradient(160deg,#0d2a24,#1a4638 55%,#12352c)}.login-card{width:min(420px,100%);background:#fffaf2f5;border-radius:24px;padding:28px 26px 24px;box-shadow:var(--shadow);animation:rise .45s ease both}.login-kicker{margin:0 0 8px;color:var(--accent-deep);font-family:var(--font-ui);font-size:.85rem;letter-spacing:.04em}.login-card h1{margin:0;font-family:var(--font-display);font-size:2rem}.login-copy{margin:10px 0 22px;color:var(--muted);line-height:1.6}.login-form{display:grid;gap:10px}.login-label{font-size:.9rem;color:var(--muted)}.login-error{margin:0;color:var(--danger);font-size:.92rem}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes drift{0%{transform:rotate(-8deg) translateY(0)}to{transform:rotate(-4deg) translateY(-16px)}}.daily-hero{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:18px;padding:28px 28px 24px;border-radius:24px;color:#f7f3ea;background:radial-gradient(circle at 88% 20%,rgba(196,154,58,.28),transparent 28%),linear-gradient(135deg,var(--hero-a),var(--hero-b) 60%,#12352c);box-shadow:var(--shadow);animation:rise .45s ease both}.daily-hero h1{margin:0;font-family:var(--font-display);font-size:clamp(2rem,5vw,3rem);letter-spacing:.04em}.daily-hero .kicker{margin:0 0 8px;color:#f7f3eab8;font-family:var(--font-ui);font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}.daily-hero .lead{margin:10px 0 0;max-width:28rem;color:#f7f3ead1;line-height:1.65}.daily-stats{display:grid;grid-template-columns:repeat(3,minmax(72px,1fr));gap:12px;min-width:min(320px,100%)}.daily-stats div{background:#fffaf214;border:1px solid rgba(255,250,242,.14);border-radius:16px;padding:14px 12px;text-align:center}.daily-stats strong{display:block;font-family:var(--font-ui);font-size:1.4rem;margin-bottom:4px}.daily-stats span{color:#f7f3eab3;font-size:.8rem}.page-wide{width:min(1280px,calc(100% - 32px))}.learn-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:16px}.learn-layout-study{grid-template-columns:220px minmax(0,1fr)}.learn-split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:14px;align-items:start}.chapter-body-side{max-height:min(72vh,860px)}.learn-quiz-pane{position:sticky;top:84px;display:grid;gap:12px;max-height:calc(100vh - 100px);overflow:auto}.learn-quiz-head{display:flex;justify-content:space-between;gap:12px;align-items:start;flex-wrap:wrap}.learn-quiz-card .question-card{margin:0}.learn-quiz-card .stem{font-size:1.12rem}.learn-quiz-card .reference-excerpt{max-height:160px;overflow:auto}.chapter-rail{position:sticky;top:84px;align-self:start;max-height:calc(100vh - 110px);overflow:auto;padding:10px;display:grid;gap:6px}.chapter-item{display:grid;grid-template-columns:42px 1fr;gap:10px;align-items:start;text-align:left;border:1px solid transparent;background:transparent;border-radius:14px;padding:10px;cursor:pointer;color:var(--text)}.chapter-item strong{display:block;font-size:.95rem;line-height:1.4}.chapter-item em{display:block;margin-top:4px;font-style:normal;color:var(--muted);font-size:.8rem}.chapter-item:hover{background:#10201c0a}.chapter-item.active{background:#b7791f1f;border-color:#b7791f47}.chapter-order{font-family:var(--font-ui);font-weight:700;color:var(--accent-deep);padding-top:2px}.learn-title{margin:0 0 12px;font-family:var(--font-display);font-size:1.55rem;line-height:1.45}.learn-digest{margin:0;color:var(--muted);line-height:1.75}.learn-reader{padding-top:14px}.reader-mode-tabs{display:flex;gap:8px;margin:0 0 12px}.reader-mode-tabs button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;cursor:pointer;color:var(--muted);font-size:.88rem}.reader-mode-tabs button.active{background:var(--ink);border-color:var(--ink);color:#fffaf2}.reader-mode-tabs button:disabled{opacity:.45;cursor:not-allowed}.chip-active{border-color:#b7791f8c!important;background:#b7791f1f!important;color:var(--text)!important}.pdf-frame-wrap{display:grid;gap:8px}.pdf-frame-meta{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:.9rem}.pdf-frame{width:100%;height:min(72vh,860px);border:1px solid var(--line);border-radius:14px;background:#fff}.section-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;max-height:140px;overflow:auto}.section-tabs button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 12px;cursor:pointer;color:var(--muted);font-size:.82rem;max-width:100%;text-align:left}.section-tabs button.active{background:var(--ink);border-color:var(--ink);color:#fffaf2}.chapter-body{max-height:min(70vh,820px);overflow:auto;padding:4px 2px 8px;border-top:1px dashed var(--line)}.chapter-text{margin:0;white-space:pre-wrap;word-break:break-word;font-family:var(--font-body);font-size:.98rem;line-height:1.85;color:var(--text)}.subhead{margin:0 0 12px;font-family:var(--font-display);font-size:1.15rem}.material-list.compact{gap:8px}.material-link{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.material-link:last-child{border-bottom:0;padding-bottom:0}.material-link span{color:var(--muted);font-size:.85rem}.result-item.quiet{background:transparent;box-shadow:none;border-style:dashed;padding:14px}.result-item.quiet h3{font-size:.98rem;font-weight:500}.search-panel{margin-bottom:4px}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--line);background:var(--panel-strong);border-radius:999px;padding:8px 12px;cursor:pointer;color:var(--muted);font:inherit;text-decoration:none;display:inline-flex;align-items:center}.chip:hover{border-color:#b7791f66;color:var(--text)}.exam-setup .toolbar{margin-bottom:8px}.exam-timer{margin:4px 0 12px;font-family:var(--font-ui);font-size:1.8rem;font-weight:700}.exam-timer.urgent{color:var(--danger)}.exam-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin:12px 0 16px;max-height:220px;overflow:auto}.exam-dot{border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 0;cursor:pointer;font-size:.78rem;color:var(--muted)}.exam-dot.filled{border-color:#1f7a5759;background:#1f7a5714;color:var(--text)}.exam-dot.current{border-color:#b7791f8c;box-shadow:0 0 0 2px #b7791f26}.option:disabled{cursor:default}@media(max-width:860px){.topbar{padding:12px 16px;flex-direction:column;align-items:stretch}.page{width:min(100% - 24px,1120px)}.hero-inner{padding:32px 24px 36px}.quiz-layout,.stat-grid,.learn-layout,.learn-layout-study,.learn-split{grid-template-columns:1fr}.side-panel,.chapter-rail,.learn-quiz-pane{position:static;max-height:none}.chapter-body-side{max-height:min(50vh,480px)}.daily-hero{flex-direction:column;align-items:stretch;padding:22px 18px}.daily-stats{min-width:0}.nav-links{overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px}}
