:root {
  /* Brand Colors (OKLCH) */
  --brand: oklch(0.55 0.12 160);
  --brand-dark: oklch(0.40 0.10 160);
  --brand-light: oklch(0.92 0.05 150);
  --brand-accent: oklch(0.65 0.18 250);
  --brand-accent-light: oklch(0.90 0.04 250);
  --brand-warm: oklch(0.70 0.14 75);
  --brand-warm-light: oklch(0.93 0.04 75);
  /* Neutral */
  --bg: oklch(0.99 0.002 160);
  --surface: oklch(0.965 0.004 160);
  --surface-hover: oklch(0.94 0.005 160);
  --ink: oklch(0.25 0.01 80);
  --ink-secondary: oklch(0.55 0.02 70);
  --ink-tertiary: oklch(0.70 0.015 70);
  --border: oklch(0.90 0.005 160);
  --border-light: oklch(0.93 0.004 160);
  /* Semantic */
  --success: oklch(0.60 0.15 145);
  --success-light: oklch(0.92 0.05 145);
  --error: oklch(0.55 0.16 30);
  --error-light: oklch(0.93 0.04 30);
  --warning: oklch(0.75 0.15 75);
  --warning-light: oklch(0.94 0.05 75);
  /* Typography */
  --font-sans: 'Inter','PingFang SC',-apple-system,sans-serif;
  --font-serif: 'Noto Serif SC',Georgia,'Songti SC',serif;
  /* Size & Space */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(15,15,15,0.06);
  --shadow-lg: 0 8px 25px rgba(15,15,15,0.08);
  --shadow-xl: 0 12px 40px rgba(15,15,15,0.10);
  --max-w: 780px;
  --max-w-wide: 960px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(0.13 0.005 180);
    --surface: oklch(0.18 0.008 180);
    --surface-hover: oklch(0.22 0.010 180);
    --ink: oklch(0.92 0.005 80);
    --ink-secondary: oklch(0.70 0.01 70);
    --ink-tertiary: oklch(0.50 0.01 70);
    --border: oklch(0.25 0.008 180);
    --border-light: oklch(0.20 0.006 180);
    --brand-light: oklch(0.15 0.06 160);
    --brand-accent-light: oklch(0.15 0.06 250);
    --success-light: oklch(0.15 0.06 145);
    --error-light: oklch(0.15 0.06 30);
    --warning-light: oklch(0.15 0.06 75);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.15);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.25);
    --shadow-lg: 0 8px 25px rgba(0,0,0,0.30);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.35);
  }
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font-sans);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;min-height:100vh}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.notion-wrap{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.notion-wra-wide{max-width:var(--max-w-wide);margin:0 auto;padding:0 24px}
.notion-hd{display:flex;align-items:center;justify-content:space-between;padding:20px 0 12px;margin-bottom:32px;border-bottom:1px solid var(--border)}
.notion-hd .lg{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--ink)}
.notion-hd .lg img{border-radius:3px;height:22px;width:auto}
.notion-hd .nv{display:flex;gap:20px;font-size:13px;align-items:center}
.notion-hd .nv a{color:var(--ink-secondary);transition:color .15s;padding:6px 0}
.notion-hd .nv a:hover,.notion-hd .nv a.cur{color:var(--ink)}
.notion-hd .nv a.cur{font-weight:600}
.login-nav{display:inline-flex;align-items:center;gap:4px;padding:5px 14px;border-radius:var(--radius-sm);background:var(--brand);color:#fff!important;font-weight:600;font-size:13px;line-height:1.4;text-decoration:none;transition:background .15s;vertical-align:middle}
.login-nav:hover{background:var(--brand-dark);color:#fff!important}
.btn-pri{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:var(--radius-md);background:var(--ink);color:#fff;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .2s;text-decoration:none;line-height:1.4}
.btn-pri:hover{background:#2b2924;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.btn-pri:active{transform:translateY(0)}
.btn-sec{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:var(--radius-md);background:transparent;color:var(--ink);font-size:13px;font-weight:500;cursor:pointer;border:1px solid var(--border);transition:all .2s;text-decoration:none}
.btn-sec:hover{background:var(--surface);border-color:var(--ink-tertiary);transform:translateY(-1px)}
.btn-brand{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border-radius:var(--radius-md);background:var(--brand);color:#fff;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .2s;text-decoration:none}
.btn-brand:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(5,150,105,0.25)}
.btn-sm{padding:6px 14px;font-size:12px}
.btn-lg{padding:14px 32px;font-size:15px}
.btn-block{width:100%;display:flex;justify-content:center}
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:13px;font-weight:500;color:var(--ink);margin-bottom:6px}
.form-input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-md);font-size:14px;outline:none;background:var(--bg);color:var(--ink);font-family:var(--font-sans);transition:border .2s,box-shadow .2s}
.form-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(5,150,105,0.1)}
.form-input::placeholder{color:var(--ink-tertiary)}
.form-input.error{border-color:var(--error)}
.form-input:disabled{background:var(--surface);color:var(--ink-tertiary);cursor:not-allowed}
.form-error{font-size:12px;color:var(--error);margin-top:4px;display:none}
.form-error.show{display:block}
.form-row{display:flex;gap:10px}
.form-row .form-input{flex:1}
.n-block{border-radius:var(--radius-md);background:var(--surface);padding:20px 24px;margin-bottom:6px;transition:all .2s;cursor:default}
.n-block:hover{background:var(--surface-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.n-block-row{display:flex;align-items:flex-start;gap:14px}
.n-block-icon{width:40px;height:40px;border-radius:var(--radius-md);background:var(--border-light);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.n-block-icon svg{width:20px;height:20px;stroke:var(--brand);stroke-width:1.8;fill:none}
.n-block-content{flex:1;min-width:0;padding-top:8px}
.n-block-title{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:2px}
.n-block-desc{font-size:13px;color:var(--ink-secondary);line-height:1.5}
.n-sec-hd{display:flex;align-items:center;gap:10px;margin-bottom:14px;margin-top:40px}
.n-sec-hd .sw{width:28px;height:28px;border-radius:var(--radius-sm);background:var(--border-light);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.n-sec-hd .sw svg{width:16px;height:16px;stroke:var(--brand);stroke-width:1.8;fill:none}
.n-sec-hd h2{font-size:16px;font-weight:600;color:var(--ink)}
.n-sec-hd .more{margin-left:auto;font-size:12px;color:var(--brand);font-weight:600;transition:color .15s}
.n-sec-hd .more:hover{color:var(--brand-dark)}
.n-stats{display:grid;grid-template-columns:repeat(3,1fr);margin-bottom:32px;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border)}
.n-stat{padding:20px 16px;text-align:center;border-right:1px solid var(--border);background:oklch(0.985 0.003 160)}
.n-stat:last-child{border-right:none}
.n-stat .num{font-family:var(--font-serif);font-size:28px;font-weight:900;color:var(--brand);line-height:1.2}
.n-stat .num.dk{color:var(--ink)}
.n-stat .lb{font-size:11px;color:var(--ink-secondary);margin-top:4px}
.n-exam-list{border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.n-exam-item{display:flex;align-items:center;gap:12px;padding:12px 16px;cursor:pointer;transition:background .15s;border-bottom:1px solid var(--border);text-decoration:none;color:inherit}
.n-exam-item:last-child{border-bottom:none}
.n-exam-item:hover{background:var(--surface)}
.n-exam-item .tag{width:32px;height:28px;border-radius:var(--radius-sm);background:var(--border);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--ink);flex-shrink:0}
.n-exam-item .tag.g{background:var(--brand);color:#fff}
.n-exam-item .info{flex:1;min-width:0}
.n-exam-item .nm{font-size:13px;font-weight:600;color:var(--ink)}
.n-exam-item .sb{font-size:11px;color:var(--ink-secondary);margin-top:1px}
.n-exam-item .ct{font-size:11px;color:var(--ink-secondary);background:var(--border-light);padding:2px 8px;border-radius:var(--radius-sm);flex-shrink:0}
.n-callout{display:flex;align-items:flex-start;gap:12px;padding:16px 20px;border-radius:var(--radius-md);background:var(--surface);margin-bottom:32px}
.n-callout .sw{width:36px;height:36px;border-radius:var(--radius-md);background:var(--border-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
.n-callout .sw svg{width:20px;height:20px;stroke:var(--brand);stroke-width:1.8;fill:none}
.n-callout .t{font-size:13px;color:var(--ink);line-height:1.6}
.n-callout .t strong{color:var(--brand)}
.n-review{display:flex;align-items:flex-start;gap:14px;padding:18px 20px;border-radius:var(--radius-md);border:1px solid var(--border);margin-bottom:32px;background:oklch(0.985 0.003 160)}
.n-review .sw{width:36px;height:36px;border-radius:50%;background:var(--brand-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
.n-review .sw svg{width:18px;height:18px;stroke:var(--brand);stroke-width:1.8;fill:none}
.n-review .qt{font-size:14px;color:var(--ink);line-height:1.7}
.n-review .qt strong{color:var(--brand)}
.n-review .au{font-size:11px;color:var(--ink-secondary);margin-top:4px}
.n-pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:32px}
.n-pcard{border-radius:var(--radius-md);border:1px solid var(--border);padding:20px;transition:all .15s;cursor:pointer;background:var(--bg);text-decoration:none;color:inherit;display:block}
.n-pcard:hover{border-color:var(--ink-tertiary)}
.n-pcard .sw{width:36px;height:36px;border-radius:var(--radius-md);background:var(--border-light);display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.n-pcard .sw svg{width:18px;height:18px;stroke:var(--brand);stroke-width:1.8;fill:none}
.n-pcard .nm{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:2px}
.n-pcard .pr{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:8px}
.n-pcard .pr small{font-size:11px;font-weight:400;color:var(--ink-secondary)}
.n-pcard .desc{font-size:11px;color:var(--ink-secondary);line-height:1.6;margin-bottom:12px}
.n-pcard .pill{display:inline-block;padding:4px 12px;border-radius:100px;font-size:11px;font-weight:600}
.n-pcard .pill.b{background:var(--brand);color:#fff}
.n-pcard .pill.o{background:var(--border-light);color:var(--ink-secondary)}
.n-pcard.feat{border-color:var(--brand);background:oklch(0.985 0.005 160)}
.n-pcard.feat .pill.b{background:var(--ink)}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin-bottom:32px}
.price-card{border-radius:var(--radius-md);border:1px solid var(--border);padding:24px;background:var(--bg);transition:all .15s;cursor:pointer;position:relative}
.price-card:hover{border-color:var(--ink-tertiary);box-shadow:var(--shadow-md)}
.price-card.featured{border-color:var(--brand);background:oklch(0.985 0.005 160)}
.price-card .badge{position:absolute;top:-8px;left:50%;transform:translateX(-50%);background:var(--brand);color:#fff;font-size:11px;font-weight:600;padding:3px 12px;border-radius:100px;box-shadow:var(--shadow-sm);white-space:nowrap}
.price-card .icon{width:36px;height:36px;border-radius:var(--radius-md);background:var(--surface);display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.price-card .icon svg{width:18px;height:18px;stroke:var(--brand);stroke-width:1.8;fill:none}
.price-card h3{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:4px}
.price-card .desc{font-size:13px;color:var(--ink-secondary);margin-bottom:12px}
.price-card .price{font-size:24px;font-weight:700;color:var(--ink);margin-bottom:4px}
.price-card .price .period{font-size:12px;font-weight:400;color:var(--ink-secondary)}
.price-card .features{list-style:none;padding:0;margin-bottom:20px}
.price-card .features li{font-size:13px;padding:4px 0;display:flex;align-items:center;gap:8px;color:var(--ink-secondary)}
.price-card .features .check{color:var(--brand);flex-shrink:0}
.price-card .btn{display:block;width:100%;padding:12px;border:none;border-radius:var(--radius-md);font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;text-align:center;transition:all .15s}
.price-card .btn.primary{background:var(--ink);color:#fff}
.price-card .btn.primary:hover{background:#2b2924}
.n-ft{padding:24px 0 40px;border-top:1px solid var(--border);text-align:center}
.n-ft p{font-size:11px;color:var(--ink-secondary);line-height:1.8}
.n-ft a{color:var(--ink-secondary);text-decoration:none}
.n-ft a:hover{color:var(--ink)}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:999;padding:10px 20px;border-radius:var(--radius-md);font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);opacity:0;transition:all .3s ease;pointer-events:none;max-width:90vw;text-align:center}
.toast.show{opacity:1}
.toast.success{background:var(--brand);color:#fff}
.toast.error{background:var(--error);color:#fff}
.toast.info{background:var(--ink);color:#fff}
.skeleton{background:linear-gradient(90deg,var(--border-light) 25%,var(--border) 50%,var(--border-light) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes spin{to{transform:rotate(360deg)}}
.fade-in{animation:fadeIn .35s cubic-bezier(.16,1,.3,1) both}
.slide-up{animation:slideUp .4s cubic-bezier(.16,1,.3,1) both}
.delay-1{animation-delay:.05s}.delay-2{animation-delay:.1s}.delay-3{animation-delay:.15s}.delay-4{animation-delay:.2s}
.delay-5{animation-delay:.3s}.delay-6{animation-delay:.4s}
.reveal{opacity:0;transform:translateY(20px);transition:opacity .5s cubic-bezier(.16,1,.3,1),transform .5s cubic-bezier(.16,1,.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-d1{transition-delay:.1s}.reveal-d2{transition-delay:.2s}.reveal-d3{transition-delay:.3s}.reveal-d4{transition-delay:.4s}.reveal-d5{transition-delay:.5s}
.n-back{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-secondary);text-decoration:none;padding:6px 0;transition:color .15s}
.n-back:hover{color:var(--ink)}
.n-back svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.8;fill:none}
.hero{display:flex;gap:64px;align-items:center;padding:80px 0 48px}
.hero-left{flex:1;min-width:0}
.hero-right{flex:0 0 340px}
.hero .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--radius-sm);background:var(--brand);color:#fff;font-size:12px;font-weight:600;margin-bottom:24px;letter-spacing:.4px}
.hero .badge svg{width:14px;height:14px;stroke:#fff;stroke-width:2;fill:none}
.hero h1{font-family:var(--font-serif);font-size:clamp(36px,5.5vw,56px);font-weight:900;line-height:1.12;letter-spacing:-.03em;color:var(--ink);margin-bottom:20px;text-wrap:balance}
.hero h1 .hl{color:var(--brand)}
.hero .sub{font-size:16px;color:var(--ink-secondary);margin-bottom:32px;line-height:1.8;max-width:540px}
.hero .btns{display:flex;gap:12px;flex-wrap:wrap}
.hero .btns .btn-pri{padding:14px 28px;font-size:15px}
.page-header{display:flex;align-items:center;gap:12px;padding:16px 0;margin-bottom:24px;border-bottom:1px solid var(--border)}
.page-header h1{font-size:17px;font-weight:600;color:var(--ink);flex:1}
.prog{height:3px;background:var(--surface)}
.prog .fill{height:100%;background:var(--brand);transition:width .3s}
.loading{position:relative;pointer-events:none;opacity:0.7}
.empty-state{text-align:center;padding:40px 20px;color:var(--ink-secondary);font-size:13px;line-height:1.8}
.login-container{max-width:400px;margin:0 auto;padding:80px 24px 40px;text-align:center;min-height:100vh;display:flex;flex-direction:column;justify-content:center}
.login-card{background:var(--bg);border-radius:var(--radius-lg);padding:32px 28px;box-shadow:var(--shadow-md);border:1px solid var(--border)}
.login-header{margin-bottom:24px}
.login-title{font-size:24px;font-weight:700;color:var(--ink);margin-bottom:4px}
.login-subtitle{font-size:14px;color:var(--ink-secondary);line-height:1.5}
.logo-section{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:32px}
.wechat-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);color:var(--ink);font-size:14px;font-weight:500;cursor:pointer;text-decoration:none;transition:all .15s;margin-bottom:16px;font-family:var(--font-sans)}
.wechat-btn:hover{background:var(--surface);border-color:#07c160;color:#07c160}
.wechat-btn svg{width:20px;height:20px;fill:#07c160}
.divider{display:flex;align-items:center;gap:12px;margin:16px 0;color:var(--ink-tertiary);font-size:12px}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--border)}
.forgot-link{display:block;font-size:13px;color:var(--brand);text-decoration:none;margin-top:16px}
.login-footer{font-size:12px;color:var(--ink-tertiary);margin-top:24px}
.login-footer a{color:var(--brand)}
.send-code-btn{padding:12px 16px;background:var(--brand-light);color:var(--brand);border:1px solid var(--border-light);border-radius:var(--radius-md);font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;transition:all .15s;font-family:var(--font-sans)}
.send-code-btn:hover:not(:disabled){background:var(--surface);border-color:var(--border)}
.send-code-btn:disabled{opacity:0.5;cursor:not-allowed}
.submit-btn{width:100%;background:var(--brand);color:#fff;border:none;padding:14px;border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;margin-top:8px;transition:all .15s;font-family:var(--font-sans)}
.submit-btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.n-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--radius-md);background:var(--ink);color:#fff;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s;text-decoration:none}
.n-btn-secondary{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--radius-md);background:var(--surface);border:1px solid var(--border);color:var(--ink);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s;text-decoration:none}
.n-btn-secondary:hover{background:var(--surface-hover)}
.living-room-header{padding:24px 0 16px;text-align:center}
.lr-title{font-family:var(--font-serif);font-size:22px;font-weight:700;color:var(--ink);margin-bottom:4px}
.lr-sub{font-size:13px;color:var(--ink-secondary);margin-bottom:20px}
.lr-stats{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.lr-stat{flex:1;min-width:90px;max-width:120px;background:var(--surface);border-radius:var(--radius-md);padding:14px 8px;text-align:center}
.lr-stat .num{font-size:22px;font-weight:700;color:var(--brand);font-family:var(--font-serif)}
.lr-stat .lb{font-size:11px;color:var(--ink-secondary);margin-top:2px}
.friend-card{padding:32px 0 28px;text-align:center}
.friend-avatar{width:64px;height:64px;border-radius:50%;background:var(--brand-light);margin:0 auto 12px;display:flex;align-items:center;justify-content:center}
.friend-name{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:4px}
.friend-sig{font-family:var(--font-serif);font-size:14px;color:var(--ink-secondary);margin-bottom:16px;font-style:italic}
.friend-stats{display:flex;justify-content:center;gap:24px;margin-bottom:20px}
.friend-stat{text-align:center}
.friend-stat .num{font-size:20px;font-weight:700;color:var(--brand);font-family:var(--font-serif)}
.friend-stat .lb{font-size:11px;color:var(--ink-secondary);margin-top:2px}
.cta-btn{display:block;width:100%;max-width:280px;margin:0 auto;padding:14px;border-radius:var(--radius-md);background:var(--brand);color:#fff;font-size:15px;font-weight:600;border:none;cursor:pointer;transition:all .2s;text-align:center;text-decoration:none}
.cta-btn:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(5,150,105,0.3)}
.qa{padding:16px 0}
.qa .meta{display:flex;justify-content:space-between;margin-bottom:10px;font-size:12px;color:var(--ink-secondary)}
.qa .stem{font-size:15px;font-weight:500;line-height:1.7;margin-bottom:16px;padding:14px 18px;background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-lg)}
.opts{display:flex;flex-direction:column;gap:6px}
.opt{display:flex;align-items:flex-start;gap:10px;padding:11px 14px;border:1.5px solid var(--border);border-radius:var(--radius-lg);font-size:14px;cursor:pointer;line-height:1.5;transition:all .15s}
.opt:hover{border-color:var(--ink-tertiary)}
.opt .letter{width:22px;height:22px;border-radius:50%;background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--ink-tertiary);flex-shrink:0}
.opt.sel,.opt.correct{border-color:var(--brand);background:var(--brand-light)}
.opt.sel .letter,.opt.correct .letter{background:var(--brand);color:#fff}
.opt.wrong{border-color:var(--error);background:var(--error-light)}
.opt.wrong .letter{background:var(--error);color:#fff}
.explain-panel{display:none;margin-top:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px 18px}
.explain-panel.show{display:block}
.result{text-align:center;padding:48px 0}
.result .pct{font-size:44px;font-weight:900;color:var(--brand);margin-bottom:6px;font-family:var(--font-serif)}
.upgrade-box{background:var(--brand-light);border:1px solid var(--success);border-radius:var(--radius-md);padding:18px;margin-bottom:16px;text-align:center}
.upgrade-box .ub-title{font-size:14px;font-weight:700;color:#065f46;margin-bottom:4px}
.upgrade-box .ub-btn{display:inline-block;background:var(--brand);color:#fff;padding:10px 24px;border-radius:var(--radius-lg);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s;text-decoration:none}
.upgrade-box .ub-btn:hover{background:var(--brand-dark)}
.tabs-wrap{position:relative;margin:0 0 12px}
.tabs{display:flex;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--border);-ms-overflow-style:none}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:10px 14px;font-size:13px;font-weight:600;color:var(--ink-secondary);cursor:pointer;border-bottom:2px solid transparent;transition:all .15s;white-space:nowrap;display:inline-flex;align-items:center;gap:4px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--brand);border-bottom-color:var(--brand)}
.feed{padding:0 0 16px}
.feed-item{display:flex;align-items:flex-start;gap:12px;padding:14px 0;border-bottom:1px solid var(--border-light)}
.feed-item:last-child{border-bottom:none}
.feed-body{flex:1;min-width:0}
.feed-nick{font-size:13px;font-weight:600;color:var(--ink)}
.feed-detail{font-size:12px;color:var(--ink-secondary);margin-top:1px}
.feed-meta{font-size:11px;color:var(--ink-tertiary);margin-top:4px}
.poster-entry{margin:20px 0;padding:16px 20px;background:var(--surface);border-radius:var(--radius-md);display:flex;align-items:center;gap:14px;cursor:pointer;transition:all .2s;text-decoration:none}
.poster-entry:hover{background:var(--surface-hover);transform:translateY(-1px)}
.poster-entry-icon{width:40px;height:40px;border-radius:50%;background:var(--brand-light);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.poster-entry-text{flex:1}
.poster-entry-title{font-size:14px;font-weight:600;color:var(--ink)}
.poster-entry-desc{font-size:12px;color:var(--ink-secondary);margin-top:2px}
.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.35);z-index:200}
.modal-overlay.show{display:flex;align-items:flex-end}
.modal-sheet{background:var(--bg);width:100%;max-width:var(--max-w);margin:0 auto;border-radius:16px 16px 0 0;padding:24px;max-height:85vh;overflow-y:auto}
.modal-sheet h2{font-size:17px;font-weight:700;margin-bottom:16px}
.bug-card{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:6px;font-size:13px;background:var(--bg)}
.bug-card .badge{font-size:10px;font-weight:700;padding:2px 8px;border-radius:100px;color:#fff;flex-shrink:0}
.badge-P0{background:var(--error)}
.badge-P1{background:var(--warning)}
.badge-P2{background:var(--brand-accent)}
.badge-P3{background:#8b5cf6}
.report-btn{position:fixed;bottom:24px;right:24px;z-index:100;width:52px;height:52px;border-radius:50%;background:var(--brand);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(5,150,105,0.3);transition:all .15s}
.report-btn:hover{transform:scale(1.08)}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin-bottom:12px}
.info-row{display:flex;justify-content:space-between;padding:8px 0;font-size:13px;border-bottom:1px solid var(--border-light)}
.info-row:last-child{border-bottom:none}
.diagnostic-card{display:flex;align-items:center;gap:16px;background:var(--brand-light);border:1px solid rgba(5,150,105,0.2);border-radius:var(--radius-md);padding:20px;cursor:pointer;transition:all .15s;margin-bottom:12px}
.notion-error-icon svg{width:48px;height:48px;stroke:var(--ink-tertiary)}
.notion-error-title{font-size:24px;font-weight:700;color:var(--ink);margin-bottom:8px}
.notion-error-desc{font-size:13px;color:var(--ink-secondary);margin-bottom:20px}
.notion-error-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.free-tier{background:var(--brand-light);border:1px solid var(--success-light);border-radius:var(--radius-md);padding:24px;text-align:center;margin-bottom:32px}
.free-tier .features{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:16px}
.free-tier .features span{font-size:11px;padding:4px 10px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--ink-secondary)}
.comparison{margin-bottom:32px}
.comp-table{width:100%;border-collapse:collapse;font-size:13px;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.comp-table th{padding:12px 16px;font-weight:600;background:var(--surface);font-size:12px;border-bottom:1px solid var(--border)}
.comp-table td{padding:12px 16px;border-bottom:1px solid var(--border-light)}
.sbar{padding:12px 0;margin-bottom:8px}
.sbar input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-md);font-size:13px;outline:none;background:var(--bg);color:var(--ink);transition:border .15s}
.sbar input:focus{border-color:var(--brand)}
.cat-header{padding:12px 0 8px;font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px;color:var(--ink)}
.cat-body{display:flex;flex-wrap:wrap;gap:4px}
.exam-btn{flex:1;min-width:calc(50% - 2px);background:var(--surface);padding:14px 12px;text-align:center;cursor:pointer;transition:background .15s;text-decoration:none;color:inherit;border-radius:var(--radius-md)}
.exam-btn:hover{background:var(--surface-hover)}
.exam-btn .name{font-size:13px;font-weight:600;color:var(--ink)}
.exam-btn.paused{opacity:0.4;cursor:default}
.hero-section{display:flex;gap:16px;align-items:flex-start;padding:24px 0;margin-bottom:32px}
.hero-title{font-size:24px;font-weight:700;color:var(--ink);margin-bottom:4px}
.hero-meta{font-size:13px;font-weight:600;color:var(--brand)}
.content-section{margin-bottom:40px}
.section-title{font-size:15px;font-weight:600;color:var(--ink)}
.stat-num{font-family:var(--font-serif);font-size:28px;font-weight:900;color:var(--brand);line-height:1.2}
.stat-num.dk{color:var(--ink)}
@media(max-width:768px){
  .hero-right{display:none}
}
@media(max-width:640px){
  .notion-wrap{padding:0 16px}
  .notion-hd{padding:16px 0 10px;margin-bottom:24px;gap:8px}
  .notion-hd .nv{gap:10px;font-size:12px}
  .n-pricing{grid-template-columns:1fr}
  .n-block{padding:16px 18px}
  .n-stats{grid-template-columns:repeat(3,1fr)}
  .pricing-grid{grid-template-columns:1fr;gap:8px}
  .hero{flex-direction:column;padding:48px 0 32px;gap:32px}
  .hero .sub{max-width:100%}
  .hero-right{flex:0 0 auto;width:100%;max-width:320px;margin:0 auto}
  .nv a{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
  .exam-btn,.btn,.btn-pri,.btn-sec{min-height:44px}
  .login-container{padding:60px 16px 32px}
  .login-card{padding:24px 20px}
  .hero-section{flex-direction:column;gap:12px}
  .friend-stats{gap:16px}
  .lr-stats{gap:6px}
  .poster-entry{padding:14px 16px}
}