:root{--color-bg: #f8f7f4;--color-surface: #ffffff;--color-text: #1c1c1c;--color-text-secondary: #4a4a4a;--color-text-muted: #8a8a8a;--color-border: #e5e3df;--color-accent: #2c3e50;--font-serif: "Noto Serif SC", "STSong", "SimSun", serif;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;--max-width: 760px;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 2rem;--spacing-lg: 4rem;--spacing-xl: 6rem;--radius: .5rem;--shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.04)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.7;letter-spacing:.01em}a{color:var(--color-text);text-decoration:none;transition:all .2s ease}a:hover{opacity:.65}.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--spacing-sm)}header{padding:var(--spacing-md) 0;border-bottom:1px solid var(--color-border);background:var(--color-surface);position:sticky;top:0;z-index:1000}header .container{display:flex;justify-content:space-between;align-items:center;position:relative}.logo{font-family:var(--font-serif);font-size:1.25rem;font-weight:600;color:var(--color-text);letter-spacing:-.02em}.logo-with-avatar{display:inline-flex;align-items:center;gap:.65rem;text-decoration:none}.logo-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;border:1.5px solid var(--color-border);background:var(--color-surface);box-shadow:0 1px 3px #0000000a;flex-shrink:0}.logo-with-avatar:hover{opacity:1}.logo-with-avatar:hover .logo-avatar{transform:scale(1.05);border-color:var(--color-text-muted)}.logo-avatar{transition:transform .2s ease,border-color .2s ease}@media (max-width: 640px){.logo-avatar{width:34px;height:34px}.logo-with-avatar{gap:.5rem}.logo{font-size:1.1rem}}nav a{margin-left:var(--spacing-md);font-size:.9rem;font-weight:500;color:var(--color-text-muted);position:relative;padding-bottom:3px}nav a:hover,nav a.active{color:var(--color-text);opacity:1}nav a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:1px;background:var(--color-text);transition:width .2s ease}nav a:hover:after,nav a.active:after{width:100%}.status-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1.1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:14px;margin-bottom:2rem;flex-wrap:wrap}.status-info{display:flex;align-items:center;gap:.7rem}.status-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:1px solid var(--color-border);flex-shrink:0}.status-text{display:flex;flex-direction:column;gap:.2rem}.status-email-line{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}.status-email{font-size:.85rem;font-weight:600;color:var(--color-text);line-height:1.2}.status-badge{display:inline-flex;align-items:center;font-size:.62rem;font-weight:600;letter-spacing:.04em;padding:.15rem .5rem;border-radius:999px;white-space:nowrap;width:fit-content}.status-badge--course{background:#3d6b5a14;color:#3d6b5a;border:1px solid rgba(61,107,90,.18)}.status-badge--member{background:linear-gradient(135deg,#b899681f,#b899680f);color:#8b6d3b;border:1px solid rgba(184,153,104,.25)}.status-logout{display:flex;align-items:center;gap:.35rem;padding:.4rem .8rem;border:1px solid var(--color-border);border-radius:10px;background:transparent;color:var(--color-text-muted);font-size:.78rem;font-weight:500;cursor:pointer;transition:all .2s ease;flex-shrink:0}.status-logout svg{width:14px;height:14px}.status-logout:hover{border-color:#b04b3a;color:#b04b3a;background:#b04b3a0a}.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:transparent;border:none;cursor:pointer;padding:0}.nav-toggle span{display:block;width:22px;height:2px;background:var(--color-text);border-radius:1px;transition:all .25s ease;transform-origin:center}.nav-toggle[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle[aria-expanded=true] span:nth-child(2){opacity:0}.nav-toggle[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}main{min-height:60vh}footer{margin-top:var(--spacing-xl);padding:3rem 0 2rem;background:#1a1a1a;color:#fff9;font-size:.85rem}.footer-inner{max-width:720px;margin:0 auto;padding:0 1.5rem;text-align:center}.footer-motto{font-family:var(--font-serif);font-size:1rem;color:#ffffffb3;margin:0 0 1.25rem;letter-spacing:.06em}.footer-brand{margin-bottom:1.75rem}.footer-avatar{width:56px;height:56px;border-radius:16px;object-fit:cover;border:2px solid rgba(255,255,255,.15);background:#fff;box-shadow:0 2px 8px #0000004d,0 0 0 1px #ffffff0f}.footer-socials{display:flex;justify-content:center;gap:.6rem;margin-bottom:2rem}.footer-social{display:inline-flex;align-items:center;justify-content:center;min-width:2.4rem;height:2.4rem;padding:0 .75rem;border:1px solid rgba(255,255,255,.15);border-radius:999px;color:#ffffff80;text-decoration:none;font-size:.78rem;transition:all .2s ease}.footer-social:hover{border-color:#fff6;color:#fff}.footer-legal{padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.08)}.footer-disclaimer{font-size:.72rem;color:#ffffff4d;line-height:1.7;margin:0 0 .5rem}.footer-copyright{font-size:.75rem;color:#ffffff40;margin:0;letter-spacing:.04em}@media (max-width: 480px){.footer-social{min-width:2.2rem;height:2.2rem;font-size:.72rem}.footer-motto{font-size:.9rem}}h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.3;margin-bottom:var(--spacing-sm)}h1{font-size:2.5rem;margin-bottom:var(--spacing-md)}h2{font-size:1.5rem;margin-top:var(--spacing-lg);margin-bottom:var(--spacing-sm);color:var(--color-text)}h3{font-size:1.25rem;margin-top:var(--spacing-md)}p{margin-bottom:var(--spacing-sm);color:var(--color-text-secondary)}.hero{padding:var(--spacing-xl) 0;text-align:center;background:var(--color-surface);border-bottom:1px solid var(--color-border);position:relative}.hero h1{font-size:3.25rem;margin-bottom:var(--spacing-sm);letter-spacing:-.03em;font-weight:700}.hero .tagline{font-family:var(--font-serif);font-size:1.35rem;color:var(--color-text-secondary);font-weight:400;margin-bottom:var(--spacing-xs);letter-spacing:.05em}.hero .description{font-size:1rem;color:var(--color-text-muted);max-width:520px;margin:0 auto;line-height:1.8}.section{padding:var(--spacing-xl) 0}.section-title{font-family:var(--font-sans);font-size:.8rem;text-transform:uppercase;letter-spacing:.15em;color:var(--color-text-muted);margin-bottom:var(--spacing-md);font-weight:600}.article-list{list-style:none}.article-item{padding:var(--spacing-md) 0;border-bottom:1px solid var(--color-border);transition:transform .2s ease}.article-item:hover{transform:translate(4px)}.article-item:first-child{padding-top:0}.article-item a{display:block}.article-item h3{font-size:1.5rem;margin-bottom:var(--spacing-xs);margin-top:0}.article-item .meta{font-size:.85rem;color:var(--color-text-muted);margin-bottom:var(--spacing-xs)}.article-item .excerpt{font-size:1rem;color:var(--color-text-secondary);margin-top:0}.article-content{max-width:var(--max-width);margin:0 auto;padding:var(--spacing-xl) var(--spacing-sm)}.article-content h1{font-size:2.5rem;margin-bottom:var(--spacing-xs)}.article-content .date{font-size:.85rem;color:var(--color-text-muted);margin-bottom:var(--spacing-lg);display:block}.article-content p{font-size:1.1rem;line-height:1.9;margin-bottom:var(--spacing-md);color:var(--color-text)}.article-content h2{font-size:1.5rem;margin-top:var(--spacing-lg);margin-bottom:var(--spacing-sm)}.article-content h3{font-size:1.2rem;margin-top:var(--spacing-md);margin-bottom:var(--spacing-xs)}.article-content ul,.article-content ol{margin-bottom:var(--spacing-md);padding-left:var(--spacing-md);font-size:1.1rem;line-height:1.9;color:var(--color-text)}.article-content li{margin-bottom:var(--spacing-xs)}.article-content blockquote{border-left:3px solid var(--color-text);padding-left:var(--spacing-md);margin:var(--spacing-md) 0;font-family:var(--font-serif);font-style:italic;color:var(--color-text-secondary)}.article-content a{border-bottom:1px solid var(--color-border);padding-bottom:1px}.article-content a:hover{border-bottom-color:var(--color-text)}.about-section{padding:var(--spacing-xl) 0}.about-section h1{margin-bottom:var(--spacing-md)}.about-section p{font-size:1.1rem;line-height:1.9;margin-bottom:var(--spacing-md)}.about-section .intro{font-size:1.25rem;color:var(--color-text);font-family:var(--font-serif);margin-bottom:var(--spacing-lg)}.nav-sections{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-sm);margin-top:var(--spacing-lg)}.nav-section-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--spacing-md);transition:all .2s ease;box-shadow:var(--shadow)}.nav-section-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000014;border-color:var(--color-text-muted)}.nav-section-card h3{font-family:var(--font-serif);font-size:1.25rem;margin-bottom:var(--spacing-xs);margin-top:0}.nav-section-card p{font-size:.9rem;color:var(--color-text-muted);margin-bottom:0;line-height:1.6}.nav-section-card .arrow{display:inline-block;margin-top:var(--spacing-sm);font-size:.85rem;color:var(--color-text-muted);transition:transform .2s ease}.nav-section-card:hover .arrow{transform:translate(4px)}.placeholder-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:3rem 2rem;text-align:center;margin:2rem 0}.placeholder-card p{color:var(--color-text-muted);margin-bottom:.5rem}.placeholder-card p.title{color:var(--color-text);font-family:var(--font-serif);font-size:1.1rem;margin-bottom:1rem}@media (max-width: 640px){.hero h1{font-size:2rem}.hero .tagline{font-size:1.05rem}.hero .description{font-size:.95rem}.nav-sections{grid-template-columns:1fr}.nav-section-card{padding:1.25rem}.nav-section-card h3{font-size:1.15rem}.nav-section-card p{font-size:.85rem}h1{font-size:1.75rem}.article-content h1{font-size:1.85rem}.article-content p,.article-content ul,.article-content ol{font-size:1.05rem}.article-content{padding:3rem 1rem}.section,.hero{padding:3rem 0}header .container{flex-direction:row;align-items:center}.nav-toggle{display:flex}nav{position:absolute;top:calc(100% + 8px);left:var(--spacing-sm);right:var(--spacing-sm);background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;flex-direction:column;padding:.5rem;gap:0;display:none;box-shadow:0 12px 32px #0000001f;opacity:0;transform:translateY(-8px);transition:opacity .2s ease,transform .2s ease}nav.open{display:flex;opacity:1;transform:translateY(0)}nav a{margin-left:0;font-size:1.05rem;font-weight:500;padding:.8rem 1rem;border-radius:8px;color:var(--color-text-secondary)}nav a:active{background:var(--color-bg)}nav a.active{color:var(--color-text);font-weight:600;background:#2c3e500d}footer{padding:2.5rem 0 1.5rem}}@media (max-width: 480px){.logo{font-size:1.15rem}nav a{font-size:1rem}.hero h1{font-size:1.8rem}.hero .tagline{font-size:1rem}.hero .description{font-size:.9rem}.article-content h1{font-size:1.65rem}.article-content h2{font-size:1.25rem}}