:root{--color-primary: #FF7A00;--color-primary-dark: #E85D00;--color-primary-light: #FFB266;--color-secondary: #1A1A1A;--color-accent: #10B981;--color-gold: #FBBF24;--color-success: #10B981;--color-bg: #FFF7ED;--color-card: #FFFFFF;--color-text-main: #1A1A1A;--color-text-sub: #6B7280;--color-divider: #F3E8D8;--color-shadow: rgba(255, 122, 0, .12);--color-pigai: #FF7A00;--color-tiku: #3D7EFF;--color-chengzhang: #8B5CF6;--color-wode: #6B7280;--rank-bronze: #CD7F32;--rank-silver: #94A3B8;--rank-gold: #FBBF24;--rank-platinum: #67E8F9;--rank-diamond: #A78BFA;--rank-king: #F59E0B;--color-text-body: #374151;--color-text-caption: #9CA3AF;--color-text-on-red: #FFFFFF;--font-hero: 36px;--font-h1: 28px;--font-h2: 22px;--font-h3: 18px;--font-body: 15px;--font-sm: 13px;--font-xs: 12px;--font-weight-bold: 700;--font-weight-semibold:600;--font-weight-medium: 500;--font-weight-regular: 400;--font-weight-light: 300;--spacing-xxs: 4px;--spacing-xs: 8px;--spacing-sm: 12px;--spacing-md: 16px;--spacing-lg: 20px;--spacing-xl: 24px;--spacing-xxl: 32px;--spacing-xxxl:40px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-2xl: 20px;--radius-3xl: 24px;--radius-4xl: 32px;--radius-full:9999px;--shadow-card: 0 4px 20px rgba(26, 26, 26, .06);--shadow-hover: 0 8px 32px rgba(255, 122, 0, .12);--shadow-button: 0 4px 14px rgba(255, 122, 0, .2);--shadow-float: 0 12px 40px rgba(0, 0, 0, .12);--shadow-hero: 0 12px 48px rgba(255, 122, 0, .18);--shadow-tab: 0 -2px 12px rgba(0, 0, 0, .05);--container-max: 680px;--page-padding: 20px;--section-gap: 28px;--gradient-primary: linear-gradient(135deg, #FF7A00 0%, #E85D00 100%);--gradient-hero: linear-gradient(160deg, #FF7A00 0%, #E85D00 50%, #C44A00 100%);--gradient-gold: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);--gradient-purple: linear-gradient(135deg, #8B5CF6 0%, #7C3AED 100%);--gradient-blue: linear-gradient(135deg, #3D7EFF 0%, #2563EB 100%);--gradient-ink: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);--mesh-blob-1: rgba(255, 122, 0, .08);--mesh-blob-2: rgba(251, 191, 36, .06);--mesh-blob-3: rgba(139, 92, 246, .04);--tabbar-height: 60px;--tabbar-center-size: 56px}html.mxj-font-lg{--font-hero: 40px;--font-h1: 31px;--font-h2: 25px;--font-h3: 20px;--font-body: 17px;--font-sm: 15px;--font-xs: 13px}html.mxj-font-xl{--font-hero: 44px;--font-h1: 34px;--font-h2: 27px;--font-h3: 22px;--font-body: 19px;--font-sm: 16px;--font-xs: 14px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-xs);border:none;cursor:pointer;font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;font-size:var(--font-body);font-weight:var(--font-weight-medium);line-height:1.4;transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease,background .15s ease}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-primary);color:#fff;padding:14px 28px;border-radius:var(--radius-xl);box-shadow:var(--shadow-button);font-weight:var(--font-weight-semibold)}.btn-primary:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.btn-secondary{background:var(--color-card);color:var(--color-primary);border:1.5px solid var(--color-primary);padding:12px 24px;border-radius:var(--radius-xl)}.btn-secondary:hover{background:#ff7a000f}.btn-ghost{background:transparent;color:var(--color-text-sub);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-md)}.btn-ghost:hover{background:#0000000a}.btn-hero{background:#ffffff38;color:#fff;padding:14px 28px;border-radius:var(--radius-xl);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3);font-weight:var(--font-weight-semibold);transition:background .2s ease,transform .2s ease}.btn-hero:hover{background:#ffffff52;transform:translateY(-2px)}.btn-gold{background:var(--gradient-gold);color:#fff;padding:14px 28px;border-radius:var(--radius-xl);box-shadow:0 4px 14px #f59e0b4d;font-weight:var(--font-weight-semibold)}.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 24px #f59e0b66}.btn-block{width:100%;display:flex}.card{background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-lg);box-shadow:var(--shadow-card);transition:box-shadow .25s ease,transform .25s ease}.card:active{transform:scale(.985);box-shadow:var(--shadow-hover)}.card-flat{box-shadow:none;border:1px solid var(--color-divider)}.card-accent-top{border-top:4px solid var(--color-primary);padding-top:var(--spacing-md)}.card-accent-left{border-left:4px solid var(--color-primary);padding-left:var(--spacing-md)}.header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:14px var(--page-padding);background:transparent;max-width:var(--container-max);margin:0 auto}.header-solid{background:#ffffffeb;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--color-divider)}.header-brand{display:flex;align-items:center;gap:8px}.header-title{font-family:Songti SC,STSong,PingFang SC,serif;font-size:var(--font-h3);font-weight:var(--font-weight-semibold);color:var(--color-text-main);letter-spacing:.5px}.header-actions{display:flex;align-items:center;gap:var(--spacing-md)}.header-icon{width:24px;height:24px;color:var(--color-text-main);cursor:pointer}.header-back{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-full);cursor:pointer;color:var(--color-text-main)}.header-back:before{content:"";display:block;width:10px;height:10px;border-left:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-left:3px}.hero-card{position:relative;background:var(--gradient-hero);border-radius:var(--radius-4xl);padding:32px 24px;color:#fff;overflow:hidden;box-shadow:var(--shadow-hero)}.hero-card:before{content:"";position:absolute;top:-60px;right:-40px;width:200px;height:200px;background:#ffffff24;border-radius:50%;filter:blur(40px);pointer-events:none}.hero-card:after{content:"";position:absolute;bottom:-50px;left:-30px;width:160px;height:160px;background:#ffffff14;border-radius:50%;filter:blur(30px);pointer-events:none}.hero-content{position:relative;z-index:1}.hero-tag{display:inline-flex;align-items:center;gap:4px;background:#ffffff38;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fff;font-size:var(--font-xs);font-weight:var(--font-weight-semibold);padding:4px 12px;border-radius:var(--radius-full);margin-bottom:var(--spacing-md)}.hero-title{font-family:Songti SC,STSong,PingFang SC,serif;font-size:var(--font-hero);font-weight:var(--font-weight-bold);line-height:1.2;color:#fff;margin-bottom:var(--spacing-sm);letter-spacing:-.01em}.hero-subtitle{font-family:-apple-system,PingFang 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ease}.quick-item:active{transform:scale(.96);box-shadow:var(--shadow-hover)}.quick-icon{width:48px;height:48px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;background:#ff7a001a;color:var(--color-primary)}.quick-icon svg{width:24px;height:24px}.quick-label{font-size:var(--font-sm);font-weight:var(--font-weight-medium);color:var(--color-text-main)}.quick-desc{font-size:var(--font-xs);color:var(--color-text-caption);text-align:center}.compare-card{background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-lg);box-shadow:var(--shadow-card)}.compare-before,.compare-after{border-radius:var(--radius-lg);padding:var(--spacing-md)}.compare-before{background:#64748b14;border:1px dashed var(--color-divider)}.compare-after{background:#ff7a0014;border:1px solid rgba(255,122,0,.2)}.compare-text{font-size:var(--font-sm);line-height:1.7;color:var(--color-text-body)}.compare-before .compare-text{color:var(--color-text-sub)}.compare-after .compare-text{color:var(--color-text-main);font-family:Songti SC,STSong,PingFang SC,serif}.compare-score{display:inline-flex;align-items:center;gap:var(--spacing-xs);margin-top:var(--spacing-sm);font-size:var(--font-xs);font-weight:var(--font-weight-semibold)}.compare-before .compare-score{color:var(--color-text-sub)}.compare-after .compare-score{color:var(--color-primary)}.compare-arrow{display:flex;align-items:center;justify-content:center;margin:var(--spacing-sm) 0;color:var(--color-primary)}.compare-arrow svg{width:24px;height:24px}.radar-list{display:flex;flex-direction:column;gap:var(--spacing-md)}.radar-item{display:grid;grid-template-columns:80px 1fr 44px;align-items:center;gap:var(--spacing-md)}.radar-label{font-size:var(--font-sm);color:var(--color-text-main);font-weight:var(--font-weight-medium)}.radar-bar{height:8px;border-radius:var(--radius-full);background:var(--color-divider);overflow:hidden}.radar-bar-fill{height:100%;border-radius:var(--radius-full);background:var(--gradient-primary);transition:width 1s var(--ease-out)}.radar-weak .radar-bar-fill{background:linear-gradient(90deg,var(--color-accent),#EF4444)}.radar-score{font-size:var(--font-sm);font-weight:var(--font-weight-semibold);color:var(--color-text-main);text-align:right}.radar-weak .radar-score,.radar-weak .radar-label{color:var(--color-accent)}.stats-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-sm);background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-lg);box-shadow:var(--shadow-card)}.stats-item{display:flex;flex-direction:column;align-items:center;text-align:center}.stats-value{font-size:var(--font-h2);font-weight:var(--font-weight-bold);color:var(--color-primary);line-height:1.2}.stats-value .unit{font-size:var(--font-sm);font-weight:var(--font-weight-medium);color:var(--color-text-sub);margin-left:2px}.stats-divider{width:1px;background:var(--color-divider);align-self:center;height:32px}.testimonial-card{background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-lg);box-shadow:var(--shadow-card);position:relative}.testimonial-card:before{content:'"';position:absolute;top:8px;left:var(--spacing-md);font-family:Songti SC,STSong,PingFang 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var(--spacing-md));z-index:90;background:var(--gradient-primary);color:#fff;width:56px;height:56px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-float);cursor:pointer;border:none;transition:transform .25s var(--ease-spring),opacity .25s ease}.float-cta svg{width:26px;height:26px}.float-cta.hidden{transform:scale(0);opacity:0;pointer-events:none}.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:100;display:flex;justify-content:space-around;align-items:flex-end;height:calc(var(--tabbar-height) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fffffff5;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid rgba(232,227,224,.6);box-shadow:var(--shadow-tab)}.tabbar:before{content:"";position:absolute;left:50%;top:-14px;transform:translate(-50%);width:72px;height:72px;border-radius:var(--radius-full);background:transparent;pointer-events:none}.tabbar-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:var(--tabbar-height);color:var(--color-text-caption);font-size:var(--font-xs);cursor:pointer;transition:color .25s ease;border:none;background:none;font-family:inherit;padding:0}.tabbar-item.active{color:var(--color-primary);font-weight:var(--font-weight-semibold)}.tabbar-icon{width:24px;height:24px;transition:transform .25s ease}.tabbar-item.active .tabbar-icon{transform:translateY(-2px)}.tabbar-item-center{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:var(--tabbar-height);position:relative}.tabbar-item-center .tabbar-center-icon{position:absolute;top:-22px;left:50%;transform:translate(-50%);width:var(--tabbar-center-size);height:var(--tabbar-center-size);border-radius:var(--radius-full);background:var(--gradient-primary);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px #ff7a0066;border:4px solid #fff;cursor:pointer;transition:transform .2s var(--ease-spring)}.tabbar-item-center .tabbar-center-icon:active{transform:translate(-50%) scale(.92)}.tabbar-item-center .tabbar-center-icon svg{width:26px;height:26px}.tabbar-item-center .tabbar-center-label{font-size:var(--font-xs);color:var(--color-primary);font-weight:var(--font-weight-semibold);margin-bottom:6px;display:block;text-align:center}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-lg)}.section-title{font-family:Songti SC,STSong,PingFang SC,serif;font-size:var(--font-h2);font-weight:var(--font-weight-semibold);color:var(--color-text-main);position:relative;padding-left:14px}.section-title:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:18px;border-radius:2px;background:var(--gradient-primary)}.section-link{font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;font-size:var(--font-sm);color:var(--color-primary);font-weight:var(--font-weight-medium);cursor:pointer;background:none;border:none;display:inline-flex;align-items:center;gap:2px;padding:6px 10px;border-radius:var(--radius-full);transition:background .2s ease,transform .15s ease}.section-link:hover{background:#ff7a0014}.section-link:active{transform:scale(.94)}.rank-card{position:relative;background:linear-gradient(135deg,var(--rank-gold) 0%,var(--color-accent) 100%);border-radius:var(--radius-3xl);padding:var(--spacing-xl);color:#fff;overflow:hidden;box-shadow:0 8px 32px #f59e0b40}.rank-card:before{content:"";position:absolute;top:-30px;right:-20px;width:140px;height:140px;background:#ffffff26;border-radius:50%;filter:blur(30px);pointer-events:none}.rank-card.rank-bronze{background:linear-gradient(135deg,var(--rank-bronze) 0%,#A0522D 100%)}.rank-card.rank-silver{background:linear-gradient(135deg,var(--rank-silver) 0%,#64748B 100%)}.rank-card.rank-platinum{background:linear-gradient(135deg,var(--rank-platinum) 0%,#06B6D4 100%)}.rank-card.rank-diamond{background:linear-gradient(135deg,var(--rank-diamond) 0%,#7C3AED 100%)}.rank-card.rank-king{background:linear-gradient(135deg,var(--rank-king) 0%,#D97706 100%)}.rank-badge{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:var(--radius-full);background:#ffffff40;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-size:28px;margin-bottom:var(--spacing-sm)}.rank-name{font-family:Songti SC,STSong,PingFang 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.day-label{font-size:10px;opacity:.7}.checkin-day.checked{background:var(--gradient-primary);color:#fff}.checkin-day.today{border:2px solid var(--color-primary);color:var(--color-primary);font-weight:var(--font-weight-semibold)}.checkin-streak{text-align:center;font-size:var(--font-sm);color:var(--color-text-sub);margin-top:var(--spacing-md)}.checkin-streak strong{color:var(--color-primary);font-weight:var(--font-weight-bold)}.badge-wall{display:flex;gap:var(--spacing-md);overflow-x:auto;padding-bottom:var(--spacing-xs);-ms-overflow-style:none;scrollbar-width:none}.badge-wall::-webkit-scrollbar{display:none}.badge-item{flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs);width:72px;text-align:center}.badge-icon{width:56px;height:56px;border-radius:var(--radius-full);background:var(--gradient-gold);color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 4px 14px #f59e0b4d}.badge-name{font-size:var(--font-xs);color:var(--color-text-main);font-weight:var(--font-weight-medium);line-height:1.3}.badge-item.locked .badge-icon{background:var(--color-divider);color:var(--color-text-caption);box-shadow:none;filter:grayscale(1)}.badge-item.locked .badge-name{color:var(--color-text-caption)}.leaderboard{background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-sm);box-shadow:var(--shadow-card)}.leaderboard-item{display:grid;grid-template-columns:40px 1fr auto;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);border-radius:var(--radius-lg);transition:background .2s ease}.leaderboard-item+.leaderboard-item{border-top:1px solid var(--color-divider);border-radius:var(--radius-lg)}.leaderboard-rank{width:32px;height:32px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-family:Songti SC,STSong,PingFang SC,serif;font-size:var(--font-sm);font-weight:var(--font-weight-bold);background:var(--color-divider);color:var(--color-text-sub)}.leaderboard-item:nth-child(1) .leaderboard-rank{background:var(--rank-gold);color:#fff}.leaderboard-item:nth-child(2) .leaderboard-rank{background:var(--rank-silver);color:#fff}.leaderboard-item:nth-child(3) .leaderboard-rank{background:var(--rank-bronze);color:#fff}.leaderboard-name{font-size:var(--font-body);color:var(--color-text-main);font-weight:var(--font-weight-medium);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.leaderboard-name .school{font-size:var(--font-xs);color:var(--color-text-caption);font-weight:var(--font-weight-regular);margin-left:var(--spacing-xs)}.leaderboard-score{font-size:var(--font-sm);font-weight:var(--font-weight-semibold);color:var(--color-primary)}.leaderboard-item.me{background:#ff7a000f;border-radius:var(--radius-lg)}.leaderboard-item.me .leaderboard-name{color:var(--color-primary);font-weight:var(--font-weight-semibold)}.question-card{background:var(--color-card);border-radius:var(--radius-2xl);padding:var(--spacing-lg);box-shadow:var(--shadow-card);transition:transform .2s ease,box-shadow .2s ease}.question-card:active{transform:scale(.99);box-shadow:var(--shadow-hover)}.question-year{display:inline-flex;align-items:center;padding:2px 10px;border-radius:var(--radius-full);background:#3b82f61a;color:var(--color-tiku);font-size:var(--font-xs);font-weight:var(--font-weight-semibold);margin-bottom:var(--spacing-sm)}.question-title{font-family:Songti SC,STSong,PingFang 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