:root{--ink: #111009;--paper: #f7f4ee;--red: #cc3120;--gold: #b8892a;--muted: #8a847a;--border: #e4dfd6;--green: #22c55e;--blue: #3b82f6;--white: #ffffff}*{margin:0;padding:0;box-sizing:border-box}body{background:var(--paper);color:var(--ink);font-family:DM Sans,sans-serif;font-weight:300;overflow-x:hidden}.cn{font-family:"Noto Serif SC",serif}.fraunces{font-family:Fraunces,serif}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}button{cursor:pointer;font-family:DM Sans,sans-serif}input,textarea{font-family:DM Sans,sans-serif}a{text-decoration:none;color:inherit}.app-layout{display:flex;flex-direction:column;min-height:100vh}.topbar{height:52px;background:var(--white);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 20px;gap:16px;position:sticky;top:0;z-index:50;flex-shrink:0}.logo{display:flex;align-items:center;gap:8px;text-decoration:none}.logo-cn{font-family:"Noto Serif SC",serif;font-size:22px;color:var(--red)}.logo-en{font-family:Fraunces,serif;font-size:17px;font-weight:700;color:var(--ink)}.bar-sep{width:1px;height:20px;background:var(--border)}.bar-nav{display:flex;overflow-x:auto;scrollbar-width:none}.bar-nav::-webkit-scrollbar{display:none}.bar-link{padding:0 12px;height:52px;display:flex;align-items:center;font-size:13px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap;transition:all .15s;text-decoration:none}.bar-link:hover{color:var(--ink)}.bar-link.active{color:var(--red);border-bottom-color:var(--red)}.bar-right{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}.streak-badge{font-size:13px;color:var(--muted)}.level-badge{padding:3px 10px;background:var(--red);color:#fff;border-radius:100px;font-size:12px;font-weight:500}.avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--gold));display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:500;color:#fff;cursor:pointer}.btn-red{padding:9px 22px;background:var(--red);color:#fff;border:none;border-radius:4px;font-size:14px;transition:background .15s}.btn-red:hover{background:#aa2818}.btn-outline{padding:9px 22px;background:transparent;color:var(--ink);border:1px solid var(--border);border-radius:4px;font-size:14px;transition:border-color .15s}.btn-outline:hover{border-color:var(--ink)}.card{background:var(--white);border:1px solid var(--border);border-radius:8px;padding:24px}.card-title{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-bottom:18px}.page-main{flex:1;padding:40px 48px;max-width:960px;width:100%;margin:0 auto}.page-title{font-family:Fraunces,serif;font-size:32px;font-weight:700;letter-spacing:-1px}.page-sub{font-size:14px;color:var(--muted);margin-top:4px}.yihan-av{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--gold));display:flex;align-items:center;justify-content:center;font-family:"Noto Serif SC",serif;color:#fff;font-size:17px;flex-shrink:0}.dark-panel{background:var(--ink);color:#fff;border-radius:10px;padding:24px}.dark-panel .label{font-size:10px;color:#5a5450;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:6px}.dark-panel .body-text{font-size:14px;line-height:1.65;color:#c0b9b0}.dark-panel .body-text strong{color:#fff}.skill-track{height:5px;background:var(--paper);border-radius:3px;overflow:hidden}.skill-fill{height:5px;border-radius:3px}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--red);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.typing-dot{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:ty 1.2s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes ty{0%,60%,to{opacity:.3;transform:none}30%{opacity:1;transform:translateY(-3px)}}.filter-btn{padding:6px 14px;border:1px solid var(--border);border-radius:100px;font-size:12px;color:var(--muted);background:#fff;transition:all .15s}.filter-btn:hover{border-color:var(--ink);color:var(--ink)}.filter-btn.active{background:var(--red);color:#fff;border-color:var(--red)}@media(max-width:768px){.page-main{padding:24px 16px}.topbar{padding:0 12px}}