:root {
    --main-color: #206ea7;
    --main-color-deep: #154d75;
    --main-color-soft: rgba(32, 110, 167, 0.12);
    --text-color: #333;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family:
        "Source Han Serif SC",
        "思源宋体",
        "Microsoft YaHei",
        "微软雅黑",
        "Noto Serif CJK SC",
        "Source Han Sans SC",
        "思源黑体",
        "Noto Sans CJK SC",
        serif;
}

header {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 36px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 16px 10px 10px;
    color: var(--main-color);
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(236, 245, 252, 0.88));
    box-shadow:
        0 14px 30px rgba(32, 110, 167, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.logo-icon {
    width: 1.6em;
    height: 1.6em;
    fill: currentColor;
    flex-shrink: 0;
    filter: drop-shadow(0 10px 18px rgba(32, 110, 167, 0.16));
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-title {
    font-size: 31px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.08em;
    color: var(--main-color-deep);
    text-transform: uppercase;
}

.logo-tagline {
    font-size: 11px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: rgba(21, 77, 117, 0.7);
}

.contact {
    display: flex;
    gap: 32px;
    font-size: 25px;
}

.contact a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--main-color);
    text-decoration: none;
}

.contact-icon {
    width: 1.2em;
    height: 1.2em;
    fill: currentColor;
    flex-shrink: 0;
}

footer {
    padding: 24px 20px 32px;
    text-align: center;
    font-size: 14px;
    color: #888;
    word-break: keep-all;
    line-break: strict;
}

@media (max-width: 720px) {
    header {
        padding: 24px 16px;
        gap: 16px;
    }

    .logo {
        gap: 10px;
        padding: 8px 12px 8px 8px;
        border-radius: 16px;
    }

    .logo-title {
        font-size: 24px;
    }

    .logo-tagline {
        font-size: 9px;
        letter-spacing: 0.18em;
    }

    .contact {
        gap: 16px;
        font-size: 22px;
    }
}