:root {
    color-scheme: light;
    --navy: #031326;
    --navy-soft: #073f89;
    --blue: #0070f0;
    --cyan: #18c8ff;
    --orange: #f0a010;
    --ink: #172033;
    --muted: #5b6474;
    --line: #dce3ee;
    --paper: #ffffff;
    --page: #f4f7fb;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--page);
    color: var(--ink);
    font: 16px/1.68 "Segoe UI", Arial, Helvetica, sans-serif;
}

header {
    position: relative;
    overflow: hidden;
    padding: 42px 20px 46px;
    background: linear-gradient(135deg, var(--navy), var(--navy-soft));
    color: #ffffff;
}

header::after {
    position: absolute;
    right: -110px;
    bottom: -180px;
    width: 420px;
    height: 420px;
    border: 2px solid rgb(24 200 255 / 24%);
    border-radius: 50%;
    content: "";
}

.header-inner,
main,
.footer-inner {
    width: min(920px, 100%);
    margin-inline: auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 18px;
}

.brand img {
    width: 108px;
    height: 82px;
    object-fit: contain;
}

h1 {
    margin: 0 0 6px;
    font-size: clamp(30px, 5vw, 46px);
    line-height: 1.14;
}

header p {
    margin: 0;
    color: #d7e8ff;
}

nav {
    margin-top: 24px;
}

nav a {
    display: inline-block;
    margin: 0 10px 8px 0;
    padding: 8px 14px;
    border: 1px solid rgb(255 255 255 / 56%);
    border-radius: 999px;
    color: #ffffff;
    font-weight: 700;
    text-decoration: none;
}

nav a[aria-current="page"],
nav a:hover,
nav a:focus-visible {
    border-color: var(--cyan);
    background: rgb(24 200 255 / 15%);
}

main {
    margin-block: 28px;
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--paper);
    box-shadow: 0 10px 28px rgb(18 38 68 / 8%);
}

h2 {
    margin-top: 34px;
    color: #063b80;
    font-size: 25px;
    line-height: 1.28;
}

h2:first-of-type {
    margin-top: 0;
}

a {
    color: #005dcc;
}

.effective {
    color: var(--muted);
    font-weight: 700;
}

.notice {
    padding: 15px 17px;
    border-left: 4px solid var(--orange);
    border-radius: 0 8px 8px 0;
    background: #fff6ef;
}

.contact-card {
    padding: 18px;
    border: 1px solid #cfe6f8;
    border-radius: 12px;
    background: #f3faff;
}

footer {
    padding: 8px 20px 40px;
    color: var(--muted);
    text-align: center;
}

@media (max-width: 680px) {
    header {
        padding-block: 30px;
    }

    .brand {
        align-items: flex-start;
    }

    .brand img {
        width: 78px;
        height: 64px;
    }

    main {
        margin: 0;
        padding: 26px 20px;
        border-width: 0;
        border-radius: 0;
    }
}