/* 共通ヘッダー（styles.css を読み込まない文書型ページ用：提案事例・提案書の見本） */
body{margin:0}
.topnav{position:sticky;top:0;background:#fff;z-index:30;border-bottom:1px solid #dce4e9;box-shadow:0 3px 16px #10294109;font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",sans-serif;margin:-24px calc(-1*max(16px,env(safe-area-inset-right,0px))) 20px calc(-1*max(16px,env(safe-area-inset-left,0px)))}
.topnav .wrap{max-width:1120px;margin:auto;padding:0 30px}
.topnav .navrow{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:20px}
.topnav .brand{font-weight:900;color:#173454;font-size:14px;line-height:1.3;text-decoration:none}
.topnav .brand small{display:block;color:#728393;font-size:10px;font-weight:600}
.topnav .navright{display:flex;align-items:center;gap:21px;font-size:13px;font-weight:800}
.topnav .navright a{color:#203345;text-decoration:none}
.topnav .navright>a:not(.btn):hover,.topnav .navright a[aria-current]{color:#d86228}
.topnav .btn{border:0;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 20px;background:#d86228;color:#fff!important;font-weight:900;font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;box-shadow:0 8px 16px #b84e2029}
.topnav .btn:hover{background:#b94b17}
.topnav .spmenu-btn,.topnav .spmenu{display:none}
@media(max-width:850px){
.topnav .wrap{padding:0 19px}.topnav .navrow{min-height:64px}
.topnav .navright a:not(.btn){display:none}.topnav .navright{margin-left:auto}
.topnav .spmenu-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid #bfcbd6;background:#fff;color:#173454;border-radius:10px;min-height:42px;padding:6px 10px;font-weight:800;font-size:12px;margin-left:8px;cursor:pointer}
.topnav .spmenu-ic{display:grid;gap:3px}.topnav .spmenu-ic i{display:block;width:16px;height:2px;background:#173454;border-radius:2px;transition:transform .2s,opacity .2s}
.topnav .spmenu-btn[aria-expanded="true"] .spmenu-ic i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.topnav .spmenu-btn[aria-expanded="true"] .spmenu-ic i:nth-child(2){opacity:0}
.topnav .spmenu-btn[aria-expanded="true"] .spmenu-ic i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.topnav .spmenu{display:grid;position:absolute;left:0;right:0;top:100%;background:#fff;border-top:1px solid #dce4e9;box-shadow:0 18px 30px #10294133;padding:8px 14px 14px;max-height:calc(100vh - 64px);overflow:auto}
.topnav .spmenu[hidden]{display:none}
.topnav .spmenu a{display:block;padding:12px 6px;border-bottom:1px solid #dce4e9;text-decoration:none}
.topnav .spmenu a b{display:block;font-size:15px;color:#173454}
.topnav .spmenu a span{display:block;font-size:12px;color:#627586}
.topnav .spmenu a[aria-current="page"] b{color:#d86228}
.topnav .spmenu a.spmenu-line{border-bottom:0}.topnav .spmenu a.spmenu-line b{color:#05a948}
}
@media(max-width:480px){.topnav .navright .btn{display:none}}
@media print{.topnav{display:none}}
.topnav .navright .btn{height:46px;min-height:0;line-height:1.2;padding:0 20px;margin:0}