.app{min-height:100vh;display:flex;flex-direction:column;position:relative}.main-content{flex:1;padding-top:86px;position:relative;z-index:1}.page-enter,.page-enter-quick,.page-enter-delay-1,.page-enter-delay-2,.page-stagger-item{opacity:0;animation:pageFadeUp .56s var(--ease-out) forwards;will-change:transform,opacity}.page-enter-quick{animation-duration:.38s}.page-enter-delay-1{animation-delay:.12s}.page-enter-delay-2{animation-delay:.22s}.page-stagger-item{animation-duration:.52s}.hero-badge-pop{animation:badgePop .42s var(--ease-spring) .14s both}@keyframes pageFadeUp{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@keyframes badgePop{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.navbar{position:fixed;top:18px;left:24px;right:24px;height:68px;background:var(--bg-overlay);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid var(--border-default);border-radius:22px;box-shadow:var(--shadow-md);z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:0 32px}.navbar-brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-size:1.18rem;font-weight:700;color:var(--text-heading)}.navbar-brand .logo{width:42px;height:42px;display:grid;place-items:center;font-size:1.2rem;border-radius:14px;background:linear-gradient(135deg,#ffffff38,#ffffff14);box-shadow:inset 0 1px #ffffff4d}.navbar-brand span:last-child{background:linear-gradient(90deg,var(--dawn-orange),var(--dawn-peach));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-menu{display:flex;align-items:center;gap:18px}.navbar-link{font-family:var(--font-display);font-size:.9rem;font-weight:600;color:var(--text-muted);transition:color var(--duration-fast) var(--ease-out),background var(--duration-fast) var(--ease-out),transform var(--duration-fast) var(--ease-out);position:relative;padding:10px 14px;border-radius:999px}.navbar-link:after{content:"";position:absolute;inset:auto 14px 6px;height:2px;background:linear-gradient(90deg,var(--brand-primary),var(--accent-secondary));border-radius:999px;transform:scaleX(.15);opacity:0;transition:transform var(--duration-normal) var(--ease-out),opacity var(--duration-normal) var(--ease-out)}.navbar-link:hover{color:var(--text-heading);background:#ffffff0f;transform:translateY(-1px)}.navbar-link:hover:after{transform:scaleX(1);opacity:1}@media (max-width: 768px){.navbar-menu{display:flex;gap:8px;overflow-x:auto;max-width:calc(100vw - 170px);scrollbar-width:none;-ms-overflow-style:none}.navbar-menu::-webkit-scrollbar{display:none}.navbar-user-pill{display:none}.navbar{left:16px;right:16px;top:14px;padding:0 20px}.navbar-right-mobile{display:flex}}.navbar-user-pill{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(135deg,#ffffff1a,#ffffff0a);border:1px solid rgba(255,255,255,.12);color:var(--text-body);font-size:.82rem;font-weight:600}.navbar-user-dot{width:8px;height:8px;border-radius:999px;background:linear-gradient(135deg,var(--brand-primary),var(--accent-secondary))}.navbar-user-level{padding:4px 8px;border-radius:999px;background:#ffffff14;color:var(--text-muted);font-size:.75rem}.theme-toggle{display:flex;align-items:center;gap:6px;padding:8px 14px;background:#ffffff0f;border:1px solid var(--border-default);border-radius:20px;cursor:pointer;transition:all var(--duration-normal) var(--ease-out);font-size:.85rem}.theme-toggle:hover{border-color:var(--brand-primary);background:#ffffff1f}.theme-icon{font-size:1rem;line-height:1}.theme-label{font-family:var(--font-mono);font-size:.75rem;font-weight:500;color:var(--text-muted)}.navbar-right-mobile{display:none;align-items:center;gap:8px}.theme-toggle-mobile{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--bg-surface);border:1px solid var(--border-default);border-radius:50%;cursor:pointer;font-size:1.1rem;transition:all var(--duration-fast) var(--ease-out)}.theme-toggle-mobile:hover{border-color:var(--brand-primary);transform:scale(1.05)}.sidebar{position:fixed;top:100px;left:24px;bottom:24px;width:312px;background:color-mix(in oklab,var(--bg-elevated) 94%,transparent);border:1px solid var(--border-default);border-radius:28px;transform:translate(-100%);transition:transform var(--duration-normal) var(--ease-out);z-index:999;overflow-y:auto;scrollbar-width:none;-ms-overflow-style:none;padding:24px 16px;box-shadow:var(--shadow-lg)}.sidebar::-webkit-scrollbar{display:none}.sidebar.open{transform:translate(0)}.sidebar-overlay{position:fixed;inset:0;background:#0009;opacity:0;visibility:hidden;transition:all var(--duration-normal) var(--ease-out);z-index:998}.sidebar-overlay.visible{opacity:1;visibility:visible}.sidebar-title{font-family:var(--font-mono);font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px;padding-left:12px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-md);margin-bottom:4px;cursor:pointer;transition:all var(--duration-fast) var(--ease-out);color:var(--text-body);font-size:.9rem}.sidebar-item:hover{background:var(--bg-surface);color:var(--text-heading)}.sidebar-item.active{background:#ff7b541f;color:var(--brand-primary)}.sidebar-item .icon{font-size:1.2rem}.sidebar-item .number{font-family:var(--font-mono);font-size:.7rem;font-weight:600;background:var(--bg-surface);color:var(--text-muted);padding:2px 8px;border-radius:4px}.home{padding:64px 0 96px}.hero{text-align:center;padding:92px 40px 86px;margin-bottom:64px;position:relative;border-radius:34px;background:radial-gradient(circle at 50% 0%,rgba(255,255,255,.12),transparent 30%),radial-gradient(circle at 14% 18%,rgba(255,138,91,.14),transparent 26%),radial-gradient(circle at 86% 22%,rgba(83,199,189,.12),transparent 24%),var(--card-highlight),var(--bg-elevated);border:1px solid var(--border-default);overflow:hidden;box-shadow:var(--shadow-lg)}.hero:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:400px;height:2px;background:linear-gradient(90deg,transparent,var(--dawn-orange),var(--dawn-peach),transparent)}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:#ffffff14;border:1px solid rgba(255,255,255,.14);border-radius:24px;font-family:var(--font-mono);font-size:.8rem;font-weight:500;color:var(--dawn-peach);margin-bottom:24px}.hero-title{margin-bottom:16px;background:linear-gradient(135deg,var(--text-heading) 0%,var(--dawn-orange) 50%,var(--dawn-peach) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.12rem;color:var(--text-secondary);max-width:640px;margin:0 auto 48px}.hero-stats{display:flex;justify-content:center;gap:64px;flex-wrap:wrap}.stat-item{text-align:center;min-width:140px;padding:18px 22px;border-radius:22px;background:#ffffff0f;border:1px solid rgba(255,255,255,.08);box-shadow:inset 0 1px #ffffff14}.stat-value{font-family:var(--font-display);font-size:3rem;font-weight:700;background:linear-gradient(180deg,var(--dawn-orange),var(--teal-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.1}.stat-label{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);margin-top:4px}.section-title{font-family:var(--font-display);font-size:1.5rem;font-weight:600;margin-bottom:32px;display:flex;align-items:center;gap:12px}.section-title:before{content:"";width:4px;height:24px;background:linear-gradient(180deg,var(--dawn-orange),var(--teal-light));border-radius:2px}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.parts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:24px}.part-card{display:block;border:1px solid var(--border-default);background:linear-gradient(180deg,color-mix(in oklab,var(--bg-elevated) 96%,transparent),color-mix(in oklab,var(--bg-surface) 78%,transparent));border-radius:30px;overflow:hidden;transition:transform var(--duration-normal) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out);position:relative;isolation:isolate}.part-card:hover{transform:translateY(-10px) scale(1.01);border-color:var(--border-accent);box-shadow:0 18px 60px #00000059,0 0 0 1px color-mix(in oklab,var(--part-color) 25%,transparent)}.part-card-top{position:relative;height:96px;display:flex;align-items:center;padding:0 20px}.part-card-icon{width:56px;height:56px;display:grid;place-items:center;font-size:1.8rem;border-radius:12px;background:#fff3;box-shadow:inset 0 0 0 1px #ffffff40;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.part-card-label{margin-left:12px;padding:6px 10px;font-family:var(--font-mono);font-size:.75rem;font-weight:600;color:#fff;background:#00000040;border:1px solid rgba(255,255,255,.35);border-radius:999px}.part-card-body{padding:22px 22px 24px}.part-card-title{font-family:var(--font-display);font-size:1.2rem;font-weight:700;margin:0 0 8px;color:var(--text-heading)}.part-card-subtitle{color:var(--text-secondary);font-size:.95rem;margin:0 0 12px}.part-card-meta{display:flex;align-items:center;gap:12px;margin:10px 0 12px}.part-card-count,.part-card-range{font-family:var(--font-mono);font-size:.8rem;background:var(--bg-surface);color:var(--text-muted);padding:6px 10px;border-radius:999px;border:1px solid var(--border-default)}.part-card-tags{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 14px}.sidebar-part-group{margin-bottom:20px}.sidebar-part-header{display:flex;align-items:center;gap:10px;margin-bottom:10px;padding:12px 14px;border-radius:18px;background:color-mix(in oklab,var(--part-color) 12%,var(--bg-surface));border:1px solid color-mix(in oklab,var(--part-color) 28%,var(--border-default));color:var(--text-heading);font-weight:600}.sidebar-part-header .icon{font-size:1.1rem}.sidebar-part-count{margin-left:auto;min-width:28px;padding:2px 8px;border-radius:999px;background:#ffffff14;color:var(--text-muted);font-family:var(--font-mono);font-size:.75rem;text-align:center}.competition-page,.competition-lesson-page,.competition-practice-page{padding:40px 0 96px}.competition-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(320px,.9fr);gap:24px;padding:38px;border-radius:34px;border:1px solid rgba(255,213,111,.2);background:radial-gradient(circle at top right,rgba(255,213,111,.18),transparent 24%),radial-gradient(circle at left 20%,rgba(83,199,189,.14),transparent 28%),linear-gradient(180deg,#0a1221f5,#0e1b2feb);box-shadow:var(--shadow-xl)}.competition-kicker,.competition-panel-label,.competition-table-label,.competition-nav-label{display:inline-flex;align-items:center;width:fit-content;padding:6px 10px;border-radius:999px;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:var(--dawn-peach);font-family:var(--font-mono);font-size:.74rem;letter-spacing:.02em}.competition-hero-copy h1,.competition-practice-sidebar-head h1{font-family:var(--font-display);font-size:clamp(2.3rem,4vw,3.8rem);line-height:1.05;color:var(--text-heading);margin:18px 0 16px}.competition-hero-copy p{max-width:62ch;color:var(--text-secondary);font-size:1.02rem}.competition-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}.competition-primary-btn,.competition-secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:14px;font-weight:700;transition:transform var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),background var(--duration-fast) var(--ease-out)}.competition-primary-btn{background:linear-gradient(135deg,#ffbf66,#ff8a5b);color:#29180b}.competition-secondary-btn{border:1px solid var(--border-default);background:#ffffff0a;color:var(--text-heading)}.competition-primary-btn:hover,.competition-secondary-btn:hover,.competition-module-card:hover,.competition-recommend-item:hover,.competition-problem-row:hover,.competition-module-pill:hover{transform:translateY(-2px)}.competition-secondary-btn.full{width:100%}.competition-hero-panel,.competition-sequence-card,.competition-note-card,.competition-algorithm-card,.competition-mini-card,.competition-anchor-card,.competition-side-card,.competition-phase-card,.competition-practice-group,.competition-inspector-card{background:linear-gradient(180deg,#ffffff0d,#ffffff05);border:1px solid rgba(255,255,255,.09);border-radius:24px}.competition-hero-panel{padding:22px}.competition-stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0 16px}.competition-stat-card{padding:18px 14px;border-radius:18px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08)}.competition-stat-card strong,.competition-inspector-metrics strong{display:block;font-family:var(--font-display);font-size:1.9rem;color:var(--text-heading)}.competition-stat-card span,.competition-inspector-metrics span{color:var(--text-muted);font-size:.82rem}.competition-sequence-card{padding:18px}.competition-progress-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:16px}.competition-progress-strip>div{padding:14px;border-radius:16px;background:#ffffff0a;border:1px solid rgba(255,255,255,.06)}.competition-progress-strip strong{display:block;color:var(--text-heading);font-family:var(--font-display);font-size:1.4rem}.competition-progress-strip span{color:var(--text-muted);font-size:.78rem}.competition-sequence-label{display:inline-block;margin-bottom:8px;font-family:var(--font-mono);font-size:.76rem;color:var(--brand-accent)}.competition-section{margin-top:34px}.competition-section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:20px}.competition-section-head.compact{align-items:start;flex-direction:column}.competition-section-head h2{font-family:var(--font-display);font-size:1.6rem;color:var(--text-heading)}.competition-section-head p{color:var(--text-muted);max-width:60ch}.competition-phase-grid,.competition-module-grid,.competition-practice-groups,.competition-check-grid,.competition-algorithm-grid{display:grid;gap:18px}.competition-phase-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.competition-phase-card,.competition-practice-group,.competition-note-card,.competition-mini-card,.competition-algorithm-card{padding:22px}.competition-phase-range{font-family:var(--font-mono);color:var(--brand-accent);font-size:.78rem}.competition-phase-card h3,.competition-module-card h3,.competition-practice-group h3,.competition-anchor-head h3,.competition-inspector-card h3{color:var(--text-heading);font-family:var(--font-display)}.competition-phase-card h3,.competition-practice-group h3{margin:10px 0 8px}.competition-phase-card p,.competition-module-card p,.competition-practice-group p,.competition-note-card li,.competition-algorithm-card p,.competition-anchor-card p,.competition-approach-card p,.competition-inspector-card p{color:var(--text-secondary)}.competition-module-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.competition-module-card{display:block;padding:24px;border-radius:28px;border:1px solid color-mix(in oklab,var(--competition-accent) 24%,var(--border-default));background:radial-gradient(circle at top right,color-mix(in oklab,var(--competition-accent) 24%,transparent),transparent 28%),linear-gradient(180deg,#ffffff0d,#ffffff05);transition:transform var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out)}.competition-module-topline,.competition-module-footer,.competition-practice-group-head,.competition-anchor-head,.competition-anchor-actions,.competition-approach-title,.competition-algorithm-top,.competition-problem-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.competition-module-topline,.competition-module-footer{font-family:var(--font-mono);font-size:.76rem;color:var(--text-muted)}.competition-module-card h3{margin:16px 0 10px}.competition-module-progress,.competition-lesson-progress{margin-top:16px}.competition-module-progress{display:grid;gap:10px}.competition-module-progress strong,.competition-lesson-progress strong,.competition-side-summary span{color:var(--text-muted);font-family:var(--font-mono);font-size:.78rem}.competition-progress-bar{height:10px;border-radius:999px;background:#ffffff14;overflow:hidden}.competition-progress-bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#ffbf66,#53c7bd)}.competition-module-tags,.competition-problem-preview-list,.competition-module-pills{display:flex;flex-wrap:wrap;gap:10px}.competition-module-tags{margin:18px 0}.competition-module-tags span,.competition-problem-preview-list span,.competition-module-pill{padding:8px 10px;border-radius:999px;background:#ffffff0f;border:1px solid rgba(255,255,255,.08);color:var(--text-body);font-size:.82rem}.competition-practice-groups{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.competition-problem-preview-list{margin-top:14px}.competition-practice-cta{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:18px;padding:22px 24px;border-radius:24px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(90deg,#ffbf6624,#53c7bd1f)}.competition-practice-cta strong{display:block;font-family:var(--font-display);font-size:2rem;color:var(--text-heading)}.competition-breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:18px;color:var(--text-muted);font-size:.9rem}.competition-breadcrumb a{color:inherit}.competition-lesson-layout,.competition-practice-shell{display:grid;grid-template-columns:260px minmax(0,1fr) 280px;gap:22px}.competition-problem-detail{display:grid;gap:18px}.competition-signal-grid,.competition-path-strip{display:grid;gap:14px}.competition-signal-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin-top:22px}.competition-signal-card,.competition-path-card,.competition-alert-card{border-radius:20px;border:1px solid rgba(255,255,255,.08);background:#ffffff0d}.competition-signal-card{padding:16px;position:relative;overflow:hidden}.competition-signal-card:before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:#ffffff29}.competition-signal-card.gold:before{background:#ffbf66}.competition-signal-card.teal:before{background:#53c7bd}.competition-signal-card.violet:before{background:#a78bfa}.competition-signal-card.rose:before{background:#fb7185}.competition-signal-card span,.competition-path-index,.competition-path-badge{display:inline-flex;align-items:center;font-family:var(--font-mono);font-size:.75rem;color:var(--text-muted)}.competition-signal-card strong,.competition-path-card strong,.competition-alert-card strong{display:block;margin:10px 0 8px;color:var(--text-heading)}.competition-signal-card p,.competition-path-card p,.competition-alert-card p{color:var(--text-secondary)}.competition-path-strip{grid-template-columns:repeat(3,minmax(0,1fr))}.competition-path-card{padding:18px;background:radial-gradient(circle at top right,rgba(255,191,102,.12),transparent 24%),#ffffff0a}.competition-path-index{width:42px;height:42px;justify-content:center;border-radius:14px;background:#ffffff14;color:var(--brand-accent)}.competition-nav-card,.competition-lesson-main,.competition-practice-sidebar,.competition-problem-table-wrap{min-width:0}.competition-lesson-nav,.competition-lesson-sidepanel,.competition-practice-sidebar,.competition-practice-inspector{position:sticky;top:110px}.competition-nav-card,.competition-side-card,.competition-inspector-card{padding:18px}.competition-nav-item{display:block;margin-top:10px;padding:12px 14px;border-radius:16px;background:#ffffff08;border:1px solid transparent}.competition-nav-item span{display:block;font-family:var(--font-mono);font-size:.72rem;color:var(--text-muted)}.competition-nav-item strong{color:var(--text-heading)}.competition-nav-item.active{border-color:#ffd56f47;background:#ffd56f14}.competition-lesson-main{display:flex;flex-direction:column;gap:18px}.competition-lesson-hero,.competition-problem-hero,.competition-lesson-section,.competition-problem-table-wrap,.competition-practice-sidebar{border-radius:30px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,#ffffff0a,#ffffff04)}.competition-lesson-hero{padding:30px;background:radial-gradient(circle at top right,color-mix(in oklab,var(--competition-accent) 22%,transparent),transparent 30%),linear-gradient(180deg,#ffffff0d,#ffffff05)}.competition-problem-hero{padding:30px;border-radius:30px;border:1px solid rgba(255,255,255,.08);background:radial-gradient(circle at top right,rgba(255,191,102,.18),transparent 28%),radial-gradient(circle at left top,rgba(83,199,189,.12),transparent 24%),linear-gradient(180deg,#ffffff0d,#ffffff05)}.competition-lesson-hero h1{margin:14px 0 10px;font-family:var(--font-display);font-size:clamp(2rem,3.6vw,3rem);color:var(--text-heading)}.competition-problem-hero h1{margin:14px 0 10px;font-family:var(--font-display);font-size:clamp(2rem,4vw,3.4rem);color:var(--text-heading)}.competition-lesson-hero p{max-width:60ch;color:var(--text-secondary)}.competition-problem-hero p{max-width:68ch;color:var(--text-secondary)}.competition-lesson-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.competition-lesson-meta span,.competition-side-group span{padding:7px 10px;border-radius:999px;background:#ffffff0d;color:var(--text-muted);font-family:var(--font-mono);font-size:.76rem}.competition-lesson-section{padding:24px}.competition-lesson-progress{display:grid;gap:10px;max-width:320px;margin-top:18px}.competition-check-grid,.competition-dual-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.competition-dual-panel,.competition-anchor-list,.competition-approach-list,.competition-recommend-list,.competition-group-list{display:grid;gap:16px}.competition-note-card span,.competition-side-group strong{display:block;margin-bottom:12px;color:var(--text-heading);font-weight:700}.competition-note-card ul,.competition-side-list{padding-left:18px}.competition-algorithm-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.competition-algorithm-top strong,.competition-anchor-head span,.competition-approach-title strong{color:var(--text-heading)}.competition-algorithm-top span,.competition-approach-title span{color:var(--brand-accent);font-family:var(--font-mono);font-size:.76rem}.competition-algorithm-card small,.competition-approach-card small,.competition-side-group p{display:block;margin-top:12px;color:var(--text-muted)}.competition-anchor-list,.competition-recommend-list{grid-template-columns:1fr}.competition-anchor-card{padding:22px}.competition-anchor-head{margin-bottom:12px}.competition-anchor-actions{justify-content:flex-end;flex-wrap:wrap}.competition-anchor-head a{padding:8px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.08);color:var(--text-heading);white-space:nowrap}.competition-approach-list{margin-top:18px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.competition-approach-card,.competition-recommend-item{padding:16px;border-radius:18px;background:#ffffff0a;border:1px solid rgba(255,255,255,.06)}.competition-recommend-item{display:grid;grid-template-columns:72px minmax(0,1fr) 100px;align-items:center;gap:14px}.competition-problem-id{font-family:var(--font-mono);color:var(--brand-accent)}.competition-recommend-item strong,.competition-group-item strong,.competition-problem-row strong{color:var(--text-heading)}.competition-problem-link{color:var(--text-heading);font-weight:700}.competition-problem-link:hover{color:var(--brand-accent)}.competition-recommend-item span:last-child{justify-self:end;color:var(--text-muted)}.competition-inline-actions,.competition-row-actions,.competition-side-summary{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.competition-inline-actions{grid-column:1 / -1}.competition-tag-btn,.competition-open-link{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:0 10px;border-radius:999px;border:1px solid rgba(255,255,255,.08);background:#ffffff0a;color:var(--text-body);font-size:.8rem;transition:transform var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),background var(--duration-fast) var(--ease-out)}.competition-tag-btn.active.success{background:var(--status-success-bg);border-color:var(--status-success-border);color:var(--status-success-fg)}.competition-tag-btn.active.danger{background:var(--status-danger-bg);border-color:var(--status-danger-border);color:var(--status-danger-fg)}.competition-tag-btn.active.warn{background:var(--status-warn-bg);border-color:var(--status-warn-border);color:var(--status-warn-fg)}.competition-open-link:hover,.competition-tag-btn:hover{transform:translateY(-1px)}.competition-detailed-list{display:grid;gap:16px}.competition-detailed-card{padding:20px;border-radius:22px;background:#ffffff0a;border:1px solid rgba(255,255,255,.07)}.competition-detailed-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.competition-path-badge{padding:7px 10px;border-radius:999px;background:#ffffff14;color:var(--brand-accent)}.competition-detailed-lead{margin:12px 0 16px;color:var(--text-body)}.competition-step-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:18px}.competition-step-node{padding:14px;border-radius:18px;background:#ffffff0d;border:1px solid rgba(255,255,255,.07)}.competition-step-node span{display:inline-grid;place-items:center;width:28px;height:28px;margin-bottom:10px;border-radius:50%;background:linear-gradient(135deg,#ffbf66,#ff8a5b);color:#23170b;font-family:var(--font-mono);font-size:.8rem;font-weight:700}.competition-step-node p{color:var(--text-secondary)}.competition-detailed-columns{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}.competition-detail-label{display:inline-block;margin-bottom:8px;color:var(--brand-accent);font-family:var(--font-mono);font-size:.76rem}.competition-detail-list{padding-left:18px;color:var(--text-secondary)}.competition-detail-list.ordered{list-style:decimal}.competition-detail-list li+li{margin-top:8px}.competition-checklist-card,.competition-learning-route{background:radial-gradient(circle at top right,rgba(83,199,189,.08),transparent 28%),#ffffff0a}.competition-alert-card{padding:14px;background:#fb718514;border-color:#fb71852e}.competition-side-card+.competition-side-card,.competition-inspector-card+.competition-inspector-card{margin-top:16px}.competition-side-group+.competition-side-group{margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.08)}.competition-practice-sidebar,.competition-problem-table-wrap{padding:20px}.competition-practice-sidebar-head span{color:var(--brand-accent);font-family:var(--font-mono);font-size:.78rem}.competition-group-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;border-radius:16px;background:#ffffff08;border:1px solid transparent;color:var(--text-body);text-align:left}.competition-group-item.active{background:#ffd56f1a;border-color:#ffd56f3d}.competition-group-item span{color:var(--text-muted);font-family:var(--font-mono);font-size:.76rem}.competition-problem-table-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}.competition-problem-table-head h2{margin:10px 0 6px;color:var(--text-heading);font-family:var(--font-display);font-size:2rem}.competition-problem-table-head p{color:var(--text-muted)}.competition-problem-table{border-radius:20px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}.competition-problem-row{display:grid;grid-template-columns:60px minmax(0,1.4fr) 90px 100px 120px;padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.06);background:#08111f52}.competition-problem-row.header{background:#ffffff0a;font-family:var(--font-mono);font-size:.76rem;color:var(--text-muted)}.competition-status-dot{display:inline-flex;width:10px;height:10px;border-radius:50%;background:#ffffff42}.competition-status-dot.warmup{background:var(--brand-accent);box-shadow:0 0 0 4px #ffd56f1f}.competition-status-dot.done{background:var(--status-success-fg);box-shadow:0 0 0 4px #29c48c24}.competition-inspector-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}.competition-side-summary{margin-top:16px}@media (max-width: 1200px){.competition-lesson-layout,.competition-practice-shell{grid-template-columns:1fr}.competition-nav-card,.competition-lesson-nav,.competition-lesson-sidepanel,.competition-practice-sidebar,.competition-practice-inspector{position:static}.competition-lesson-nav,.competition-lesson-sidepanel,.competition-practice-inspector{order:2}}@media (max-width: 900px){.competition-hero,.competition-phase-grid,.competition-signal-grid,.competition-path-strip,.competition-check-grid,.competition-dual-panel,.competition-detailed-columns,.competition-step-flow{grid-template-columns:1fr}.competition-practice-cta,.competition-problem-table-head,.competition-section-head{flex-direction:column;align-items:start}}@media (max-width: 720px){.competition-page,.competition-lesson-page,.competition-practice-page{padding-top:24px}.competition-hero,.competition-lesson-hero,.competition-problem-hero,.competition-lesson-section,.competition-practice-sidebar,.competition-problem-table-wrap{padding:18px;border-radius:24px}.competition-problem-row,.competition-recommend-item{grid-template-columns:1fr;gap:8px}.competition-progress-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.competition-problem-row.header{display:none}.competition-stat-grid,.competition-inspector-metrics{grid-template-columns:1fr}}.part-card-tag{font-family:var(--font-mono);font-size:.7rem;color:var(--text-muted);padding:6px 10px;border-radius:999px;border:1px dashed var(--border-default);background:color-mix(in oklab,var(--bg-surface) 90%,var(--part-color) 10%)}@keyframes exam-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.part-card-arrow{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-display);font-weight:600;color:var(--text-heading);margin-top:4px;transition:transform var(--duration-fast) var(--ease-out),color var(--duration-fast)}.part-card:hover .part-card-arrow{transform:translate(4px);color:var(--part-color)}.course-card{display:block;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all var(--duration-normal) var(--ease-out);position:relative;overflow:hidden}.course-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--card-color, var(--dawn-orange));opacity:0;transition:opacity var(--duration-normal) var(--ease-out)}.course-card:hover{border-color:var(--border-accent);transform:translateY(-6px);box-shadow:0 12px 40px #0000004d,0 0 0 1px #ff7b541a}.course-card:hover:before{opacity:1}.course-header{display:flex;gap:16px;margin-bottom:16px}.course-icon{font-size:2.5rem;line-height:1}.course-meta{flex:1;min-width:0}.course-number{font-family:var(--font-mono);font-size:.75rem;font-weight:600;color:var(--card-color, var(--dawn-orange));margin-bottom:4px}.course-title{font-family:var(--font-display);font-size:1.1rem;font-weight:600;color:var(--text-heading);margin:0;line-height:1.3}.course-subtitle{font-size:.9rem;color:var(--text-muted);margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-footer{display:flex;justify-content:space-between;align-items:center}.course-category{font-family:var(--font-mono);font-size:.7rem;font-weight:500;padding:4px 10px;background:var(--bg-surface);color:var(--text-muted);border-radius:4px}.course-badge{display:flex;align-items:center;gap:4px;font-family:var(--font-mono);font-size:.75rem;color:var(--teal-light)}.difficulty{display:flex;gap:4px;margin-top:12px}.difficulty-dot{width:8px;height:8px;border-radius:50%;background:var(--bg-surface);transition:background var(--duration-fast)}.difficulty-dot.active{background:var(--card-color, var(--dawn-orange))}.lesson-page{display:grid;grid-template-columns:1fr 300px;gap:32px;padding:32px;max-width:1400px;margin:0 auto}.lesson-content{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:40px 48px;min-width:0}.lesson-sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:104px;height:fit-content;max-height:calc(100vh - 140px);overflow-y:auto}.lesson-header{margin-bottom:40px;padding-bottom:32px;border-bottom:1px solid var(--border-default)}.lesson-breadcrumb{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);margin-bottom:20px}.lesson-breadcrumb a{color:var(--brand-primary)}.lesson-breadcrumb a:hover{text-decoration:underline}.lesson-title-row{display:flex;align-items:flex-start;gap:20px}.lesson-icon{font-size:3.5rem;line-height:1}.lesson-main-title{font-size:1.75rem;margin:0 0 8px;background:linear-gradient(90deg,var(--text-heading),var(--dawn-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.lesson-subtitle{color:var(--text-muted);font-size:1rem;margin:0}.lesson-toc{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:20px}.toc-title{font-family:var(--font-display);font-size:.9rem;font-weight:600;color:var(--text-heading);margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--border-default)}.toc-list{list-style:none;margin:0;padding:0}.toc-item{display:block;width:100%;padding:8px 12px;margin-bottom:4px;background:transparent;border:none;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:.85rem;color:var(--text-muted);text-align:left;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.toc-item:hover{background:var(--bg-surface);color:var(--text-body)}.toc-item.active{background:#ff7b541a;color:var(--brand-primary)}.lesson-nav{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:20px}.lesson-nav-title{font-family:var(--font-display);font-size:.9rem;font-weight:600;color:var(--text-heading);margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--border-default)}.lesson-nav-list{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.lesson-nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 8px;border-radius:var(--radius-sm);font-size:.75rem;color:var(--text-muted);transition:all var(--duration-fast) var(--ease-out);text-align:center}.lesson-nav-item .icon{font-size:1.25rem}.lesson-nav-item .number{font-family:var(--font-mono);font-size:.65rem;font-weight:500}.lesson-nav-item:hover{background:var(--bg-surface);color:var(--text-body)}.lesson-nav-item.active{background:#ff7b541f;color:var(--brand-primary)}.lesson-nav-buttons{display:flex;justify-content:center;gap:16px;margin-top:48px;padding-top:32px;border-top:1px solid var(--border-default)}.nav-btn{display:flex;align-items:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);font-family:var(--font-display);font-size:.9rem;font-weight:500;transition:all var(--duration-normal) var(--ease-out)}.nav-btn.prev,.nav-btn.next{background:var(--bg-surface);color:var(--text-body);border:1px solid var(--border-default)}.nav-btn.prev:hover,.nav-btn.next:hover{border-color:var(--brand-primary);color:var(--brand-primary);transform:translateY(-2px)}.nav-btn.home{background:linear-gradient(135deg,var(--dawn-orange),var(--dawn-peach));color:var(--bg-base)}.nav-btn.home:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff7b544d}.code-block{position:relative;margin:1.5rem 0}.code-language{position:absolute;top:0;right:16px;padding:4px 12px;background:var(--bg-surface);border-radius:0 0 8px 8px;font-family:var(--font-mono);font-size:.7rem;font-weight:600;color:var(--dawn-peach);text-transform:uppercase;z-index:1}.inline-code{font-family:var(--font-mono);font-size:.9em;background:#ff7b541a;color:var(--syntax-keyword);padding:.2em .5em;border-radius:var(--radius-sm);border:1px solid rgba(255,123,84,.2)}@media (max-width: 1024px){.lesson-page{grid-template-columns:1fr;padding:20px}.lesson-sidebar{display:none}.lesson-content{padding:24px}.lesson-title-row{flex-direction:column;align-items:center;text-align:center}.lesson-nav-buttons{flex-direction:column}}.visualizer-container{padding:32px;max-width:1000px;margin:0 auto}.visualizer-header{text-align:center;margin-bottom:40px;padding:28px 30px;border-radius:28px;background:var(--panel-glass);border:1px solid var(--border-default);box-shadow:var(--shadow-lg);backdrop-filter:blur(16px)}.visualizer-title{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:8px}.visualizer-desc{color:var(--text-muted);font-size:1rem}.complexity-badge{display:inline-block;margin-top:12px;padding:6px 16px;background:color-mix(in oklab,var(--algo-accent) 12%,transparent);border:1px solid color-mix(in oklab,var(--algo-accent) 28%,transparent);border-radius:20px;font-family:var(--font-mono);font-size:.85rem;color:var(--algo-accent)}.visualizer-canvas{background:linear-gradient(180deg,color-mix(in oklab,var(--panel-strong) 96%,transparent),color-mix(in oklab,var(--panel-bg) 82%,transparent));border:1px solid var(--border-default);border-radius:28px;padding:40px;min-height:380px;margin-bottom:24px;box-shadow:var(--shadow-lg)}.array-container{display:flex;justify-content:center;align-items:flex-end;gap:8px;height:280px;padding:16px}.array-bar{display:flex;flex-direction:column;align-items:center;gap:8px}.bar{width:44px;border-radius:8px 8px 4px 4px;background:linear-gradient(180deg,var(--dawn-orange),var(--dawn-peach));transition:all .25s var(--ease-out);display:flex;align-items:flex-end;justify-content:center;padding-bottom:8px;color:var(--bg-base);font-family:var(--font-mono);font-weight:600;font-size:.8rem}.bar.comparing{background:linear-gradient(180deg,var(--status-danger-fg),color-mix(in oklab,var(--status-danger-fg) 72%,white));transform:scaleY(1.02)}.bar.sorted{background:linear-gradient(180deg,var(--status-success-fg),color-mix(in oklab,var(--status-success-fg) 72%,white))}.bar.pivot{background:linear-gradient(180deg,var(--brand-accent),color-mix(in oklab,var(--brand-accent) 72%,white))}.bar.highlight{background:linear-gradient(180deg,var(--status-info-fg),color-mix(in oklab,var(--status-info-fg) 72%,white))}.bar-index{font-family:var(--font-mono);font-size:.7rem;color:var(--text-subtle)}.step-info{text-align:center;padding:20px 24px;background:var(--panel-bg);border:1px solid var(--border-default);border-radius:22px;margin-bottom:24px;box-shadow:var(--shadow-md)}.step-info h4{font-family:var(--font-display);font-size:1rem;color:var(--algo-accent);margin-bottom:6px}.step-info p{font-family:var(--font-mono);font-size:.9rem;color:var(--text-muted);margin:0}.controls{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:32px}.control-btn{display:flex;align-items:center;gap:8px;padding:12px 20px;border-radius:var(--radius-md);font-family:var(--font-display);font-weight:500;font-size:.9rem;transition:all var(--duration-normal) var(--ease-out)}.control-btn.primary{background:linear-gradient(135deg,var(--brand-primary),var(--accent-secondary));color:var(--bg-base)}.control-btn.primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-glow)}.control-btn.primary:disabled{opacity:.6;cursor:not-allowed}.control-btn.secondary{background:var(--bg-surface);color:var(--text-body);border:1px solid var(--border-default)}.control-btn.secondary:hover:not(:disabled){border-color:var(--brand-primary);color:var(--brand-primary)}.control-btn.secondary:disabled{opacity:.5;cursor:not-allowed}.speed-control{display:flex;align-items:center;gap:10px;padding:0 16px}.speed-control label{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted)}.speed-slider{width:100px;height:4px;-webkit-appearance:none;background:var(--panel-soft);border-radius:2px;outline:none}.speed-slider::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--algo-accent);cursor:pointer;box-shadow:var(--shadow-glow)}.algo-switcher{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;padding:24px;background:var(--panel-bg);border-radius:26px;border:1px solid var(--border-default);box-shadow:var(--shadow-md)}.algo-btn{padding:10px 20px;border-radius:var(--radius-md);font-family:var(--font-display);font-size:.85rem;font-weight:500;transition:all var(--duration-fast) var(--ease-out)}.algo-btn:not(.active){background:transparent;color:var(--text-muted)}.algo-btn:not(.active):hover{background:var(--bg-elevated);color:var(--text-body)}.algo-btn.active{background:linear-gradient(135deg,var(--brand-primary),var(--accent-secondary));color:var(--bg-base)}.user-bar{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:linear-gradient(135deg,color-mix(in oklab,var(--bg-elevated) 92%,transparent),color-mix(in oklab,var(--bg-surface) 82%,transparent));border:1px solid var(--border-default);border-radius:24px;margin-bottom:32px;flex-wrap:wrap;gap:16px;box-shadow:var(--shadow-md)}.user-info{display:flex;align-items:center;gap:12px}.user-avatar{width:46px;height:46px;display:grid;place-items:center;border-radius:16px;font-size:1.2rem;background:linear-gradient(135deg,var(--brand-primary),var(--accent-secondary));box-shadow:0 10px 24px #00000029}.user-name{font-weight:500;color:var(--text-heading)}.user-actions{display:flex;align-items:center;gap:16px}.progress-badge{font-family:var(--font-mono);font-size:.85rem;color:var(--teal-light);background:#53c7bd1f;padding:8px 16px;border-radius:20px;border:1px solid rgba(78,205,196,.3)}.logout-btn{padding:8px 16px;background:#ffffff0f;border:1px solid var(--border-default);border-radius:var(--radius-md);color:var(--text-muted);font-size:.85rem;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.logout-btn:hover{border-color:var(--danger);color:var(--danger);background:#dc262614}.unlock-progress{margin-bottom:48px;padding:24px;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg)}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-size:.9rem}.progress-header>span:first-child{font-weight:600;color:var(--text-heading)}.progress-text{font-family:var(--font-mono);color:var(--teal-light);font-size:.85rem}.progress-bar{height:8px;background:var(--bg-surface);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--dawn-orange),var(--teal-light));border-radius:4px;transition:width .5s var(--ease-out)}.course-card.locked{position:relative;cursor:not-allowed;opacity:.7}.course-card.locked:hover{transform:none;border-color:var(--border-default);box-shadow:none}.course-card.locked:before{opacity:0}.locked-overlay{position:absolute;inset:0;background:#0f172ad9;backdrop-filter:blur(4px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-lg);z-index:10}.lock-icon{font-size:2rem}.unlock-time{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);background:var(--bg-surface);padding:4px 12px;border-radius:12px}.lesson-locked-page{min-height:calc(100vh - 100px);display:flex;align-items:center;justify-content:center;padding:32px}.locked-content{text-align:center;max-width:450px;padding:48px;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-xl)}.locked-content .locked-icon{font-size:4rem;margin-bottom:24px;display:block}.locked-content h1{font-size:1.75rem;margin-bottom:16px;background:linear-gradient(90deg,var(--text-heading),var(--dawn-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.locked-course-name{display:flex;align-items:center;justify-content:center;gap:12px;font-size:1.1rem;color:var(--text-secondary);margin-bottom:32px}.locked-course-name .course-icon{font-size:1.5rem}.unlock-info{display:flex;flex-direction:column;gap:8px;padding:24px;background:var(--bg-surface);border-radius:var(--radius-lg);margin-bottom:24px}.unlock-label{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em}.unlock-info .unlock-time{font-size:1.1rem;font-weight:600;color:var(--dawn-orange);background:transparent;padding:0}.locked-hint{color:var(--text-muted);font-size:.9rem;margin-bottom:32px}.lesson-nav-item.locked{opacity:.5;cursor:not-allowed}.lesson-nav-item.locked:hover{background:transparent}.nav-btn.locked{background:var(--bg-surface);color:var(--text-subtle);border:1px solid var(--border-default);cursor:not-allowed;opacity:.6}.loading-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted)}.loading-spinner-large{width:48px;height:48px;border:3px solid var(--border-default);border-top-color:var(--brand-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.user-bar{flex-direction:column;text-align:center}.user-info,.user-actions{justify-content:center}.progress-header{flex-direction:column;gap:8px;text-align:center}}.modal-backdrop{position:fixed;inset:0;background:#000000b3;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:2000;padding:20px}.modal-content{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-xl);width:100%;max-width:900px;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 20px 50px #0000004d}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border-default);display:flex;align-items:center;justify-content:space-between}.modal-title{margin:0;font-family:var(--font-display);font-size:1.25rem;color:var(--text-heading)}.modal-close-btn{background:transparent;border:none;color:var(--text-muted);font-size:1.5rem;cursor:pointer;padding:4px;line-height:1;border-radius:4px;transition:all .2s}.modal-close-btn:hover{background:var(--bg-surface);color:var(--text-heading)}.modal-body{padding:32px;overflow-y:auto;font-size:.95rem}.resource-list{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px}.resource-title{font-family:var(--font-display);font-size:.9rem;font-weight:600;color:var(--text-heading);margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--border-default);display:flex;justify-content:space-between;align-items:center}.resource-item{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;margin-bottom:8px;background:var(--bg-surface);border:1px solid transparent;border-radius:var(--radius-md);color:var(--text-body);font-family:var(--font-body);font-size:.9rem;text-align:left;cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.resource-item:hover{background:var(--bg-elevated);border-color:var(--brand-primary);color:var(--brand-primary);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.resource-icon{font-size:1.2rem}.modal-body h1{font-size:1.8rem;margin-bottom:1.5rem;color:var(--text-heading)}.modal-body h2{font-size:1.4rem;margin-top:2rem;margin-bottom:1rem;color:var(--text-heading);border-bottom:1px solid var(--border-default);padding-bottom:.5rem}.modal-body p{line-height:1.7;margin-bottom:1rem;color:var(--text-body)}.modal-body table{width:100%;border-collapse:collapse;margin:1.5rem 0}.modal-body th,.modal-body td{padding:12px;border:1px solid var(--border-default);text-align:left}.modal-body th{background:var(--bg-surface);font-weight:600}:root{--dawn-orange: #ff8a5b;--dawn-peach: #f6b26b;--dawn-yellow: #f8d16c;--teal-deep: #0f7b70;--teal-light: #53c7bd;--brand-primary: #ff7b54;--brand-secondary: #4ecdc4;--brand-accent: #ffd56f;--primary: #ff7b54;--secondary: #4ecdc4;--bg-base: #08111f;--bg-elevated: #111c2f;--bg-surface: #1a2941;--bg-overlay: rgba(9, 17, 31, .82);--text-heading: #f8fbff;--text-body: #d4deea;--text-muted: #94a7be;--text-subtle: #61738b;--text-primary: #f8fbff;--text-secondary: #d7e0ea;--border-default: rgba(143, 161, 184, .24);--border-muted: rgba(26, 41, 65, .82);--border-accent: rgba(255, 138, 91, .46);--border-subtle: rgba(143, 161, 184, .18);--syntax-keyword: #ff7b68;--syntax-string: #a5d6ff;--syntax-function: #d2a8ff;--syntax-variable: #ffa657;--syntax-comment: #8b949e;--danger: #dc2626;--success: #10b981;--accent-primary: #4ecdc4;--accent-secondary: #ff7b54;--font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", sans-serif;--font-mono: "SFMono-Regular", "Menlo", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;--font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Segoe UI", sans-serif;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 12px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(255, 123, 84, .15);--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--duration-fast: .15s;--duration-normal: .3s;--duration-slow: .5s;--bg-card: rgba(17, 28, 47, .92);--bg-primary: #08111f;--bg-secondary: #101c31;--exam-code-bg: #0b1530;--exam-code-text: #dbeafe;--exam-code-border: rgba(96, 165, 250, .22);--exam-code-header: rgba(15, 23, 42, .96);--page-gradient: radial-gradient(circle at top, rgba(255, 138, 91, .16), transparent 32%), radial-gradient(circle at 82% 18%, rgba(83, 199, 189, .14), transparent 26%), linear-gradient(180deg, #07101d 0%, #0b1627 100%);--card-highlight: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));--panel-bg: color-mix(in oklab, var(--bg-elevated) 94%, transparent);--panel-strong: color-mix(in oklab, var(--bg-elevated) 98%, transparent);--panel-soft: color-mix(in oklab, var(--bg-surface) 82%, transparent);--panel-glass: linear-gradient(135deg, color-mix(in oklab, var(--bg-elevated) 94%, transparent), color-mix(in oklab, var(--bg-surface) 82%, transparent));--glass-stroke: rgba(255,255,255,.08);--shadow-xl: 0 36px 90px rgba(2, 8, 23, .32);--status-success-fg: #29c48c;--status-success-bg: rgba(41, 196, 140, .14);--status-success-border: rgba(41, 196, 140, .24);--status-warn-fg: #f0a35a;--status-warn-bg: rgba(240, 163, 90, .14);--status-warn-border: rgba(240, 163, 90, .24);--status-danger-fg: #ff7d7d;--status-danger-bg: rgba(255, 125, 125, .14);--status-danger-border: rgba(255, 125, 125, .24);--status-info-fg: #8ea2ff;--status-info-bg: rgba(142, 162, 255, .14);--status-info-border: rgba(142, 162, 255, .24)}[data-theme=light]{--dawn-orange: #d97745;--dawn-peach: #f0b35a;--dawn-yellow: #f5d27a;--teal-deep: #15756b;--teal-light: #1f9d8f;--brand-primary: #d97745;--brand-secondary: #1f9d8f;--brand-accent: #e6a93d;--primary: #d97745;--secondary: #1f9d8f;--bg-base: #f6f1e8;--bg-elevated: rgba(255, 251, 245, .92);--bg-surface: #efe5d8;--bg-overlay: rgba(246, 241, 232, .82);--bg-card: rgba(255, 251, 245, .9);--bg-primary: #f6f1e8;--bg-secondary: #efe5d8;--exam-code-bg: linear-gradient(180deg, #f8fbff 0%, #eef4ff 100%);--exam-code-text: #0f2747;--exam-code-border: rgba(59, 130, 246, .22);--exam-code-header: rgba(226, 232, 240, .92);--text-heading: #1d1a17;--text-body: #3a342d;--text-muted: #6f6257;--text-subtle: #aa9e90;--text-primary: #1d1a17;--text-secondary: #564d45;--border-default: rgba(122, 103, 84, .16);--border-muted: rgba(239, 229, 216, .84);--border-accent: rgba(217, 119, 69, .28);--border-subtle: rgba(122, 103, 84, .12);--syntax-keyword: #c2410c;--syntax-string: #0f766e;--syntax-function: #7c3aed;--syntax-variable: #9a3412;--syntax-comment: #7c6f64;--danger: #dc2626;--success: #10b981;--accent-primary: #d97745;--accent-secondary: #15756b;--shadow-sm: 0 10px 20px rgba(89, 61, 38, .04);--shadow-md: 0 18px 36px rgba(89, 61, 38, .08);--shadow-lg: 0 30px 70px rgba(89, 61, 38, .12);--shadow-glow: 0 0 40px rgba(217, 119, 69, .08);--page-gradient: radial-gradient(circle at top, rgba(217, 119, 69, .14), transparent 30%), radial-gradient(circle at 85% 12%, rgba(31, 157, 143, .12), transparent 24%), linear-gradient(180deg, #f6f1e8 0%, #f0e7db 46%, #eee4d8 100%);--card-highlight: linear-gradient(135deg, rgba(255,255,255,.72), rgba(255,255,255,.18));--panel-bg: color-mix(in oklab, var(--bg-elevated) 94%, transparent);--panel-strong: color-mix(in oklab, var(--bg-elevated) 98%, transparent);--panel-soft: color-mix(in oklab, var(--bg-surface) 78%, transparent);--panel-glass: linear-gradient(135deg, color-mix(in oklab, var(--bg-elevated) 96%, transparent), color-mix(in oklab, var(--bg-surface) 84%, transparent));--glass-stroke: rgba(255,255,255,.42);--shadow-xl: 0 34px 80px rgba(89, 61, 38, .16);--status-success-fg: #15803d;--status-success-bg: rgba(34, 197, 94, .14);--status-success-border: rgba(34, 197, 94, .2);--status-warn-fg: #b45309;--status-warn-bg: rgba(245, 158, 11, .14);--status-warn-border: rgba(245, 158, 11, .2);--status-danger-fg: #dc2626;--status-danger-bg: rgba(220, 38, 38, .12);--status-danger-border: rgba(220, 38, 38, .18);--status-info-fg: #4f46e5;--status-info-bg: rgba(99, 102, 241, .12);--status-info-border: rgba(99, 102, 241, .18)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-body);background:var(--page-gradient);color:var(--text-body);line-height:1.7;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body:before{content:"";position:fixed;inset:0;background:radial-gradient(circle at 10% 12%,rgba(255,138,91,.1),transparent 22%),radial-gradient(circle at 86% 18%,rgba(83,199,189,.08),transparent 24%),linear-gradient(120deg,rgba(255,255,255,.02),transparent 40%);pointer-events:none;z-index:0}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--bg-base)}::-webkit-scrollbar-thumb{background:var(--bg-surface);border:3px solid var(--bg-base);border-radius:6px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}::selection{background:#ff7b544d;color:var(--text-heading)}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:600;color:var(--text-heading);line-height:1.3;letter-spacing:-.02em}h1{font-size:clamp(2.25rem,5vw,3.5rem);font-weight:700}h2{font-size:clamp(1.5rem,3vw,2rem)}h3{font-size:1.25rem}p{color:var(--text-body)}a{color:var(--brand-primary);text-decoration:none;transition:color var(--duration-fast) var(--ease-out)}a:hover{color:var(--dawn-peach)}code{font-family:var(--font-mono);font-size:.9em;background:#ff7b541a;color:var(--syntax-keyword);padding:.2em .5em;border-radius:var(--radius-sm);border:1px solid rgba(255,123,84,.2)}pre{font-family:var(--font-mono);font-size:.9rem;line-height:1.6;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:1.25rem 1.5rem;overflow-x:auto;position:relative}pre:before{content:"●  ●  ●";position:absolute;top:0;left:0;right:0;padding:8px 16px;font-size:10px;letter-spacing:4px;color:var(--text-subtle);background:var(--bg-surface);border-bottom:1px solid var(--border-default);border-radius:var(--radius-md) var(--radius-md) 0 0}pre code{background:none;border:none;padding:0;color:var(--text-body);display:block;margin-top:32px}button{font-family:var(--font-body);cursor:pointer;border:none;outline:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-family:var(--font-display);font-weight:500;font-size:.95rem;border-radius:var(--radius-md);transition:all var(--duration-normal) var(--ease-out)}.btn-primary{background:linear-gradient(135deg,var(--dawn-orange),var(--dawn-peach));color:var(--bg-base);box-shadow:0 4px 20px #ff7b544d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px #ff7b5466}.btn-outline{background:transparent;color:var(--brand-primary);border:1.5px solid var(--brand-primary)}.btn-outline:hover{background:#ff7b541a}.markdown-content{line-height:1.8}.markdown-content h1{font-size:2rem;margin-top:2rem;margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:2px solid var(--border-default);background:linear-gradient(90deg,var(--dawn-orange),var(--dawn-peach));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.markdown-content h2{font-size:1.5rem;margin-top:2rem;margin-bottom:1rem;color:var(--text-heading);display:flex;align-items:center;gap:12px}.markdown-content h2:before{content:"";width:4px;height:24px;background:linear-gradient(180deg,var(--dawn-orange),var(--teal-light));border-radius:2px}.markdown-content h3{font-size:1.15rem;margin-top:1.5rem;margin-bottom:.75rem;color:var(--teal-light)}.markdown-content p{margin-bottom:1rem}.markdown-content ul,.markdown-content ol{margin-bottom:1rem;padding-left:1.5rem}.markdown-content li{margin-bottom:.5rem}.markdown-content li::marker{color:var(--brand-primary)}.markdown-content table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.95rem;background:var(--bg-elevated);border-radius:var(--radius-md);overflow:hidden}.markdown-content th{background:var(--bg-surface);color:var(--text-heading);font-family:var(--font-display);font-weight:600;text-align:left;padding:14px 16px;border-bottom:1px solid var(--border-default)}.markdown-content td{padding:12px 16px;border-bottom:1px solid var(--border-muted)}.markdown-content tr:last-child td{border-bottom:none}.markdown-content blockquote{margin:1.5rem 0;padding:1rem 1.25rem;background:linear-gradient(90deg,rgba(255,123,84,.1),transparent);border-left:4px solid var(--brand-primary);border-radius:0 var(--radius-md) var(--radius-md) 0;font-style:italic}.markdown-content blockquote p{margin:0;color:var(--dawn-peach)}.markdown-content hr{border:none;height:1px;background:linear-gradient(90deg,var(--border-default),transparent);margin:2.5rem 0}.markdown-content strong{color:var(--text-heading);font-weight:600}.markdown-content em{color:var(--teal-light);font-style:normal}.container{max-width:1440px;margin:0 auto;padding:0 24px;position:relative;z-index:1}.card{background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:24px;transition:all var(--duration-normal) var(--ease-out)}.card:hover{border-color:var(--border-accent);box-shadow:var(--shadow-glow);transform:translateY(-4px)}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes pulse-soft{0%,to{opacity:1}50%{opacity:.7}}.animate-fade-up{animation:fadeUp .6s var(--ease-out) forwards}