*{margin:0;padding:0;box-sizing:border-box}body{font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;background:#f5f6f8;color:#333;font-size:14px}a{text-decoration:none;color:inherit;cursor:pointer}ul,ol{list-style:none}.pc-app{min-height:100vh;display:flex;flex-direction:column}.pc-header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 8px #0000000f}.header-inner{max-width:1200px;margin:0 auto;height:64px;display:flex;align-items:center;padding:0 20px}.logo{display:flex;align-items:baseline;margin-right:48px}.logo-text{font-size:26px;font-weight:700;color:#ff5253}.logo-sub{font-size:12px;color:#999;margin-left:8px}.header-nav{display:flex;flex:1}.header-nav a{margin-right:32px;font-size:15px;color:#555;padding:6px 0}.header-nav a.active{color:#ff5253;font-weight:600}.lang-switch{display:flex;align-items:center;background:#f2f3f5;border-radius:16px;padding:2px;margin-right:20px;flex-shrink:0}.lang-switch span{font-size:12px;color:#777;padding:4px 10px;border-radius:14px;cursor:pointer;-webkit-user-select:none;user-select:none;line-height:1.4}.lang-switch span:hover{color:#ff5253}.lang-switch span.on{background:#fff;color:#ff5253;font-weight:600;box-shadow:0 1px 4px #0000001f}.header-user .login-btn{border:1px solid #ff5253;color:#ff5253;border-radius:18px;padding:6px 18px;font-size:13px}.header-user .user-info{display:flex;align-items:center;font-size:13px;color:#555}.avatar{width:30px;height:30px;border-radius:50%;margin-right:8px;object-fit:cover}.pc-main-wrap{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:16px 20px 40px}.pc-footer{background:#fff;border-top:1px solid #eee;text-align:center;padding:24px 0;color:#999;font-size:12px}.footer-sub{margin-top:6px}