html, body {
    margin: 0;
    overflow: hidden;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, #000000 0%, #5788fe 100%);
    font-family: 'Questrial', 'Noto Serif SC', sans-serif;
}

.filter {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: #fe5757;
    animation: colorChange 30s ease-in-out infinite;
    mix-blend-mode: overlay;
}

@keyframes colorChange {
    0%, 100% { opacity: 0; }
    50% { opacity: .9; }
}

.landscape {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('');
    background-size: 1000px 250px;
    background-repeat: repeat-x;
    background-position: center bottom;
}

/* ===== 内容容器 ===== */
.content {
    user-select: none;
    text-align: center;
    color: #fff;
    position: absolute;
    left: 50%;
    top: 45%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    width: 80%;
    max-width: 800px;
}

.content .title {
    margin: 15px 0;
    font-size: 2.5em;
    letter-spacing: 4px;
    color: #FFF;
}

.content .hr {
    width: 50%;
    margin: 20px auto;
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.8);
}

/* ===== 两列导航（新样式，覆盖旧类） ===== */
.cover-navigation {
    margin: 30px 0;
}

.cover-navigation--primary .two-col-nav {
    display: flex !important;
    justify-content: center !important;
    align-items: flex-start !important;
    gap: 80px !important;      /* 左右列间距加大 */
    flex-wrap: wrap !important;
    list-style: none !important;
    padding: 0 !important;
    margin: 20px 0 0 0 !important;
}

.nav-col {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 18px !important;      /* 垂直间距加大 */
    flex: 0 1 auto !important;
    min-width: 140px !important;
}

.nav-col .nav-link {
    display: inline-block !important;
    padding: 14px 36px !important;    /* 内边距加大，更容易点击 */
    border-radius: 50px !important;
    background: rgba(255, 255, 255, 0.12) !important; /* 背景更明显 */
    backdrop-filter: blur(4px) !important;
    -webkit-backdrop-filter: blur(4px) !important;
    border: 1px solid rgba(255, 255, 255, 0.25) !important; /* 边框更亮 */
    color: #ffffff !important;        /* 纯白色，确保清晰 */
    text-decoration: none !important;
    font-size: 20px !important;       /* 字体加大 */
    font-weight: 500 !important;      /* 加粗一点 */
    letter-spacing: 2px !important;
    transition: all 0.3s ease !important;
    width: 100% !important;
    text-align: center !important;
    box-sizing: border-box !important;
    min-width: 140px !important;
    text-shadow: 0 0 10px rgba(0,0,0,0.3); /* 文字阴影增强可读性 */
}

.nav-col .nav-link:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.6) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4) !important;
}

/* ===== 响应式：小屏堆叠 ===== */
@media (max-width: 600px) {
    .cover-navigation--primary .two-col-nav {
        gap: 30px !important;
        flex-direction: column !important;
        align-items: center !important;
    }
    .nav-col {
        width: 100% !important;
        max-width: 280px !important;
    }
    .nav-col .nav-link {
        min-width: unset !important;
        width: 100% !important;
        font-size: 18px !important;
    }
}

/* ===== 版权信息 ===== */
.nav01_fooder {
    margin-top: 40px;
    color: rgba(255,255,255,0.6);
    font-size: 14px;
}
.nav01_fooder a {
    color: #fff;
    text-decoration: none;
}
.nav01_fooder a:hover {
    text-decoration: underline;
}