:root{--bg:#ffffff;--card-bg:#ffffff;--text:#000000;--text-secondary:#555555;--border:#e5e5e5;--shadow:0 2px 4px rgba(0, 0, 0, 0.04);--radius:4px;--nav-height:64px;--max-width:1200px;--font:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;--tag-bg:#f8f8f8;--tag-active-bg:#e0e0e0;--tag-active-color:#000000;--scroll-btn-bg:rgba(255, 255, 255, 0.9);--scroll-btn-color:#555555;--shuo-submit-color:#ffffff;--logo-accent-text:#0d8368;--shuo-name:#576b95}[data-theme=dark]{--bg:#1e1e1e;--card-bg:#2a2a2a;--text:#eeeeee;--text-secondary:#aaaaaa;--border:#444;--shadow:0 2px 8px rgba(0, 0, 0, 0.3);--tag-bg:#333;--tag-active-bg:#555;--tag-active-color:#ffffff;--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1);--scroll-btn-bg:rgba(30, 30, 30, 0.9);--scroll-btn-color:#aaaaaa;--shuo-submit-color:#000000;--logo-accent-text:#7beec7;--shuo-name:#7f9ed0}:root{--btn-bg:#000000;--btn-color:#ffffff;--logo-filter:none}[data-theme=dark]{--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1)}@media(prefers-color-scheme:dark){[data-theme=auto]{--bg:#1e1e1e;--card-bg:#2a2a2a;--text:#eeeeee;--text-secondary:#aaaaaa;--border:#444;--shadow:0 2px 8px rgba(0, 0, 0, 0.3);--tag-bg:#333;--tag-active-bg:#555;--tag-active-color:#ffffff;--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1);--scroll-btn-bg:rgba(30, 30, 30, 0.9);--scroll-btn-color:#aaaaaa;--shuo-submit-color:#000000;--shuo-name:#7f9ed0}}*{margin:0;padding:0;box-sizing:border-box}html{font-size:17px;scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s;min-height:100vh;display:flex;flex-direction:column;font-size:1rem}a{color:inherit;text-decoration:none}.skip-link{position:absolute;left:-9999px;top:0;z-index:200;padding:10px 16px;background:var(--card-bg);color:var(--text);border:1px solid var(--border);border-radius:0 0 var(--radius)0;font-size:.9rem;line-height:1.2}.skip-link:focus{left:0;outline:2px solid var(--text);outline-offset:2px}#main:focus{outline:none}.site-nav{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:rgba(255,255,255,.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,6%);z-index:100;display:flex;align-items:center;padding:0 16px;transition:background .3s,border-color .3s}[data-theme=dark] .site-nav{background:rgba(30,30,30,.96)}@media(prefers-color-scheme:dark){[data-theme=auto] .site-nav{background:rgba(30,30,30,.96)}}.nav-inner{max-width:var(--max-width);width:100%;margin:0 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#ddd);--waline-disable-bg-color:var(--tag-bg, #f8f8f8);--waline-disable-color:var(--text-secondary, #999);--waline-info-bg-color:var(--tag-bg, #f8f8f8);--waline-info-color:var(--text-secondary, #999);--waline-bq-color:var(--tag-bg, #f0f0f0)}.wl-avatar,.wl-user .wl-avatar,.wl-user .wl-user-avatar,.wl-user-avatar,.wl-header-avatar,.wl-user img,.wl-avatar img,.wl-user .wl-avatar img,.wl-user .wl-user-avatar img,.wl-user-avatar img,.wl-header-avatar img,.wl-comment .wl-avatar,.wl-comment .wl-avatar img{width:48px!important;height:48px!important;min-width:48px!important;min-height:48px!important;max-width:48px!important;max-height:48px!important;aspect-ratio:1/1!important;border-radius:50%!important;object-fit:cover!important;background-size:cover!important;background-position:50%!important;background-repeat:no-repeat!important;flex:none!important;align-self:center!important;box-sizing:border-box}.nav-underline{position:absolute;left:0;bottom:1px;height:2px;width:0;border-radius:2px;opacity:0;pointer-events:none;background:linear-gradient(90deg,rgba(123,238,199,0) 0%,#7beec7 22%,#7beec7 78%,rgba(123,238,199,0) 100%);transition:transform .32s cubic-bezier(.22,.61,.36,1),width .32s cubic-bezier(.22,.61,.36,1),opacity .2s ease;will-change:transform,width}.nav-link{padding:4px 12px;font-size:.9rem;font-weight:400;color:var(--text-secondary);transition:all .25s ease;white-space:nowrap;cursor:pointer;background:0 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a:hover{color:var(--text);transform:translateY(-2px)}.scroll-buttons{position:fixed;bottom:100px;right:30px;display:flex;flex-direction:column;gap:8px;z-index:999}.scroll-buttons .scroll-btn{background:var(--scroll-btn-bg);border:none;border-radius:50%;width:40px;height:40px;font-size:1.2rem;cursor:pointer;color:var(--scroll-btn-color);box-shadow:0 4px 12px rgba(0,0,0,.15);backdrop-filter:blur(8px);transition:all .2s;display:flex;align-items:center;justify-content:center;-webkit-tap-highlight-color:transparent;-webkit-appearance:none;appearance:none}@media(hover:hover) and (pointer:fine){.scroll-buttons .scroll-btn:hover{background:var(--tag-active-bg);color:var(--text)}}.scroll-buttons .scroll-btn:focus{outline:none}.scroll-buttons .scroll-btn:focus-visible{outline:2px solid var(--text);outline-offset:2px}.scroll-buttons .scroll-btn.hidden{opacity:0;pointer-events:none;transition:opacity .3s}@media(max-width:820px){.scroll-buttons{bottom:80px;right:16px}}@media(max-width:500px){.site-nav{height:56px;padding:0 12px}.nav-logo{font-size:.95rem}.nav-logo img{height:38px;max-height:calc(56px - 12px)}.main{padding:calc(var(--nav-height) + 20px)16px 20px}.section-title{font-size:1.7rem}.section-desc{font-size:.95rem}.footer{flex-direction:column;align-items:center;text-align:center}.footer .footer-left{align-items:center}.footer .footer-right{align-items:center}.scroll-buttons{bottom:70px;right:16px}.scroll-buttons .scroll-btn{width:36px;height:36px;font-size:1rem}.footer .footer-right .social-row{grid-template-columns:repeat(4,1fr)}}body.lightbox-open{overflow:hidden}.lightbox{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.92);animation:lightboxIn .18s ease}.lightbox[hidden]{display:none}@keyframes 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