.site-header {
    max-width: 720px;
    width: 100%;
    margin: 0 auto;

    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    z-index: 9999;
    background: #fff;
    font-family: Arial, sans-serif;

    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* 给页面内容留空间（避免被遮挡） */
body {
    padding-top: 20px;
}

/* =========================
   第一行：咖啡色
========================= */
.header-top {
    background: #5a3e2b;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    margin-top: -10px;
}

/* 左大 */
.header-logo {
    width: 65%;
}

.header-logo img {
    width: 100%;
    height: auto;
    display: block;
}

/* 右小 */
.header-support {
    width: 35%;
}

.header-support img {
    width: 100%;
    height: auto;
    display: block;
}

/* =========================
   第二行：导航白色
========================= */
.header-nav {
    background: #fff;
    border-top: 1px solid #eee;
}

.header-nav ul {
    display: flex;
    justify-content: space-between;
    margin: 0;
    padding: 10px 6px;
    list-style: none;
}

.header-nav li {
    flex: 1;
    text-align: center;
}

/* ⭐ 图标 + 文字同一行（关键） */
.header-nav a {
    display: flex;
    align-items: center;   /* 横向居中 */
    justify-content: center;
    gap: 6px;

    text-decoration: none;
    color: #111;
    font-size: 16px;
    font-weight: 700;
}

/* 图标 */
.header-nav i {
    font-size: 16px;
    color: #000;
}

/* hover */
.header-nav a:hover {
    color: #5a3e2b;
}

/* ===== 保持 PC / Mobile 一致 ===== */
@media (min-width: 721px) {
    .site-header {
        max-width: 720px;
    }
}