*{margin:0;padding:0;box-sizing:border-box}body{font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif;background:#f0f2f5;color:#333}.app-container{min-height:100vh;display:flex;flex-direction:column}.nav-bar{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:#1a3a5c;box-shadow:0 2px 8px #00000026}.nav-brand{color:#fff;font-size:18px;font-weight:700;text-decoration:none}.nav-links a{color:#ffffffbf;text-decoration:none;margin-left:24px;font-size:14px;padding:6px 0;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}.nav-links a:hover,.nav-links a.active{color:#fff;border-bottom-color:#4fc3f7}.main-content{flex:1;padding:20px 24px}.page-title{font-size:22px;margin-bottom:20px;color:#1a3a5c}.section-card{background:#fff;border-radius:8px;padding:20px;margin-bottom:16px;box-shadow:0 1px 4px #00000014}.section-title{font-size:15px;font-weight:700;margin-bottom:12px;color:#1a3a5c;border-left:3px solid #4fc3f7;padding-left:8px}.form-row{display:flex;align-items:center;margin-bottom:10px;gap:8px}.form-row label{width:150px;font-size:13px;color:#555;text-align:left;flex-shrink:0}.form-row input,.form-row select{padding:6px 10px;border:1px solid #d9d9d9;border-radius:4px;font-size:13px;width:120px}.form-row input:focus{border-color:#4fc3f7;outline:none;box-shadow:0 0 0 2px #4fc3f733}.form-error{color:#e74c3c;font-size:12px;margin-left:8px}.btn{padding:8px 20px;border:none;border-radius:4px;font-size:14px;cursor:pointer;transition:background .2s}.btn-primary{background:#1a3a5c;color:#fff}.btn-primary:hover{background:#254a73}.btn-default{background:#e8e8e8;color:#333}.btn-default:hover{background:#d9d9d9}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-group{display:flex;gap:10px;margin-top:16px}.help-tip{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;margin-left:6px;border-radius:50%;background:#b0bec5;color:#fff;font-size:11px;font-weight:700;cursor:help;position:relative;vertical-align:middle;line-height:1}.help-tip:hover{background:#607d8b}.help-tip-text{display:none;position:absolute;left:50%;bottom:28px;transform:translate(-50%);width:320px;padding:14px 16px;background:#1a3a5c;color:#e0e0e0;font-size:12px;font-weight:400;line-height:1.8;border-radius:8px;text-align:left;white-space:normal;z-index:100;box-shadow:0 4px 20px #0000004d}.help-tip-text:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:8px solid transparent;border-top-color:#1a3a5c}.help-tip-text strong{color:#4fc3f7}.help-tip:hover .help-tip-text{display:block}