:root{--site-header-height:56px}html{font-size:16px;height:100%}body{height:100%;margin:0;display:flex;flex-direction:column;min-height:100vh;background:var(--color-bg);color:var(--color-text);font-family:var(--font-stack-base);transition:background-color .15s ease,color .15s ease}a{color:var(--color-accent);text-decoration-color:currentColor}a:visited{color:var(--color-accent)}a:active,a:hover{color:var(--color-accent-hover)}.site-main{flex:1 0 auto}.site-container{max-width:1080px;margin:0 auto;padding:0 16px}.site-header{position:sticky;top:0;z-index:20;background:var(--color-surface);border-bottom:1px solid var(--color-border);transition:background-color .15s ease,border-color .15s ease}.site-header-inner{max-width:1080px;margin:0 auto;padding:0 16px;height:var(--site-header-height);display:flex;align-items:center;gap:24px}.site-brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--color-text);font-weight:700;font-size:17px;flex:none}.site-brand:visited{color:var(--color-text)}.site-brand-mark{width:32px;height:32px;color:var(--color-accent);display:flex;flex:none}.brand-mark-svg{display:block;width:100%;height:100%}body.immersive{--site-header-height:0px}.site-nav{display:flex;align-items:center;gap:4px;flex:1}.site-nav-link{padding:8px 12px;border-radius:8px;color:var(--color-text-muted);text-decoration:none;font-size:14px;transition:background-color .15s ease,color .15s ease}.site-nav-link:visited{color:var(--color-text-muted)}.site-nav-link:hover{background:var(--color-btn-active-bg);color:var(--color-text)}.site-nav-link.active{color:var(--color-text);background:var(--color-btn-bg);border:1px solid var(--color-border)}.site-nav-dropdown{position:relative}.site-nav-dropdown-trigger{display:inline-flex;align-items:center;gap:6px;border:none;background:0 0;cursor:pointer;font-family:inherit}.site-nav-dropdown-caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;transition:transform .15s ease}.site-nav-dropdown.open .site-nav-dropdown-caret{transform:rotate(180deg)}.site-nav-dropdown-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:170px;display:flex;flex-direction:column;padding:6px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;box-shadow:0 8px 24px var(--color-popup-shadow);opacity:0;transform:translateY(-6px);pointer-events:none;transition:opacity .15s ease,transform .15s ease;z-index:20}.site-nav-dropdown.open .site-nav-dropdown-menu{opacity:1;transform:translateY(0);pointer-events:auto}.site-nav-dropdown-item{padding:8px 10px;border-radius:6px;color:var(--color-text-muted);text-decoration:none;font-size:14px;white-space:nowrap;transition:background-color .15s ease,color .15s ease}.site-nav-dropdown-item:visited{color:var(--color-text-muted)}.site-nav-dropdown-item:hover{background:var(--color-btn-active-bg);color:var(--color-text)}.site-nav-dropdown-item.active{color:var(--color-text);background:var(--color-btn-bg);font-weight:600}.site-nav-dropdown-divider{height:1px;margin:6px 4px;background:var(--color-border)}.site-user-area{display:flex;align-items:center;gap:8px;flex:none}.icon-btn{width:36px;height:36px;border:1px solid var(--color-border);background:var(--color-btn-bg);border-radius:8px;font-size:16px;color:var(--color-text);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .15s ease,border-color .15s ease}.icon-btn:hover{background:var(--color-btn-active-bg)}.user-login-btn{padding:8px 14px;border-radius:8px;background:var(--color-accent);color:var(--color-on-accent);text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap}.user-login-btn:visited{color:var(--color-on-accent)}.user-login-btn:hover{background:var(--color-accent-hover)}.user-menu{display:flex;align-items:center;gap:10px}.user-nickname{font-size:14px;font-weight:600;color:var(--color-text);white-space:nowrap;max-width:120px;overflow:hidden;text-overflow:ellipsis}.user-logout-btn{padding:6px 12px;border-radius:8px;border:1px solid var(--color-border);background:var(--color-btn-bg);color:var(--color-text);font-size:13px;cursor:pointer;white-space:nowrap;transition:background-color .15s ease,border-color .15s ease}.user-logout-btn:hover{background:var(--color-btn-active-bg)}.nav-toggle{display:none;width:36px;height:36px;flex:none;border:1px solid var(--color-border);background:var(--color-btn-bg);border-radius:8px;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer}.nav-toggle span{width:18px;height:2px;background:var(--color-text)}.user-menu-dropdown .site-nav-dropdown-menu{left:auto;right:0}.user-menu-trigger .user-nickname{color:var(--color-text)}.feedback-modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:20}.feedback-modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:21;width:min(320px,calc(100vw - 32px));background:var(--color-surface);border-radius:12px;box-shadow:0 12px 32px var(--color-popup-shadow);padding:16px}.feedback-modal-header{display:flex;align-items:center;justify-content:space-between;font-size:15px;font-weight:600;margin-bottom:12px}.feedback-modal-header button{border:0;background:0 0;font-size:18px;line-height:1;cursor:pointer;color:var(--color-text-muted)}.feedback-modal-body{display:flex;flex-direction:column;align-items:center;gap:10px}.feedback-qrcode{width:160px;height:160px;object-fit:contain;margin-bottom:4px}.feedback-contact-item{display:flex;align-items:center;gap:8px;width:100%;justify-content:center;font-size:13px}.feedback-contact-label{color:var(--color-text-muted)}.feedback-contact-value{color:var(--color-text);font-weight:500}.feedback-copy-btn{border:1px solid var(--color-border);background:var(--color-btn-bg);border-radius:6px;padding:2px 8px;font-size:12px;cursor:pointer;color:var(--color-text)}.feedback-copy-btn:hover{background:var(--color-btn-active-bg)}.browser-unsupported-banner{display:none;position:fixed;top:0;left:0;right:0;z-index:99999;background:#fff3cd;color:#664d03;border-bottom:1px solid #ffecb5;padding:12px 16px;font-size:14px;line-height:1.6;text-align:center;font-family:Arial,"Microsoft YaHei",sans-serif}html[data-browser-unsupported] .browser-unsupported-banner{display:block}@media (max-width:640px){.site-header-inner{gap:12px}.nav-toggle{display:flex}.site-nav{position:fixed;top:56px;left:0;right:0;z-index:19;flex-direction:column;align-items:stretch;gap:2px;padding:8px;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:0 8px 24px var(--color-popup-shadow);transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .15s ease,transform .15s ease}.site-nav.open{opacity:1;transform:translateY(0);pointer-events:auto}.site-nav-link{padding:10px 12px}.site-nav-dropdown-menu{position:static;opacity:1;transform:none;pointer-events:auto;display:none;box-shadow:none;border:none;padding:0 0 0 12px}.site-nav-dropdown.open .site-nav-dropdown-menu{display:flex}.site-nav-dropdown-trigger{width:100%;justify-content:space-between;padding:10px 12px}.site-user-area{margin-left:auto}.user-nickname{max-width:80px}}.site-footer{flex:none;margin-top:48px;background:var(--color-surface);border-top:1px solid var(--color-border);transition:background-color .15s ease,border-color .15s ease}.site-footer-inner{max-width:1080px;margin:0 auto;padding:32px 16px 24px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}.footer-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;color:var(--color-accent);margin-bottom:8px}.footer-brand-mark{width:22px;height:22px;color:var(--color-accent);display:flex;flex:none}.footer-desc{margin:0;max-width:420px;color:var(--color-text-muted);font-size:13px;line-height:1.7}.footer-links-title{margin-bottom:10px;color:var(--color-text);font-size:13px;font-weight:600}.footer-links{display:flex;flex-direction:column;gap:8px}.footer-links a{color:var(--color-text-muted);text-decoration:none;font-size:13px}.footer-links a:visited{color:var(--color-text-muted)}.footer-links a:hover{color:var(--color-accent-hover)}.footer-meta{grid-column:1/-1;margin-top:8px;padding-top:16px;border-top:1px solid var(--color-border);display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--color-text-muted);font-size:12px}.footer-meta a{color:inherit;text-decoration:none}.footer-meta a:visited{color:inherit}.footer-meta a:hover{color:var(--color-accent-hover)}@media (max-width:640px){.site-footer-inner{grid-template-columns:1fr;gap:24px}}