@charset "utf-8";
html, body {
    margin: 0;
    padding: 0;
}
.site-logo {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
    text-decoration: none;
}

.site-logo img {
    height: 32px;   /* 你可以调 */
    width: auto;
    display: block;
}
.site-header {
    position: relative;
    background: #fff;
    border-bottom: 1px solid #eee;
    z-index: 1000;
}

/* 三段式核心 */
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 16px;

    display: flex;
    align-items: center;
    gap: 12px;
}

/* 左 logo */
.logo {
    flex: 0 0 auto;
    font-weight: bold;
    font-size: 18px;
}

/* 中间栏目 */
.top-nav {
    flex: 1;
    min-width: 0;

    display: flex;
    gap: 14px;

    overflow-x: auto;
    white-space: nowrap;
}

.top-nav a {
    flex: 0 0 auto;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    padding: 6px 8px;
}

/* 右按钮 */
.menu-toggle {
    flex: 0 0 auto;
    font-size: 22px;
    cursor: pointer;
}

.side-menu {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background: #fff;
    border-right: 1px solid #eee;

    transition: left 0.25s ease;
    z-index: 2000;
}

.side-menu.active {
    left: 0;
}

.side-menu-inner {
    padding: 60px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.side-menu a {
    text-decoration: none;
    color: #333;
    padding: 10px 0;
    border-bottom: 1px solid #f3f3f3;
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 1500;
}

.overlay.active {
    display: block;
}

.footer {
  margin-top: 40px;
  padding: 20px 10px;
  text-align: center;
  font-size: 12px;
  color: #888;
  background: #fafafa;
  border-top: 1px solid #eee;
}

.footer .footer-inner {
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.8;
}

.footer a {
  color: #4caf50;
  text-decoration: none;
  margin: 0 5px;
}

.footer a:hover {
  text-decoration: underline;
}


@media (max-width: 768px) {

    .header-inner {
        padding: 10px 12px;
    }

    .logo {
        font-size: 16px;
    }

    .top-nav {
        flex: 1;
        gap: 10px;

        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .top-nav a {
        font-size: 13px;
        padding: 5px 6px;
    }

    .menu-toggle {
        font-size: 20px;
    }
	    .site-logo img {
        height: 28px;
    }
}

@media (max-width: 480px) {

    /* ⭐ 中间栏目直接隐藏（体验更干净） */
    .top-nav {
        display: none;
    }

    .header-inner {
        justify-content: space-between;
        padding: 10px 10px;
    }

    .logo {
        font-size: 15px;
    }

    .menu-toggle {
        font-size: 22px;
    }
	    .site-logo img {
        height: 24px;
    }
}