/* ================= 基础 Reset ================= */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100vh;
    font-family: sans-serif;
    overflow-x: hidden;
}

/* ================= 全局背景（高斯模糊） ================= */
/* 由 <div class="global-bg"></div> 承载，避免 filter 影响页面内容 */
.global-bg {
    will-change: transform;
    position: fixed;
    inset: 0;
    background: url('../image/bk_psou.jpg') center center / cover no-repeat;
    filter: blur(4px) saturate(1.1) brightness(0.8);  /* 降低亮度 */
    transform: scale(1.1);
    z-index: -2;
    pointer-events: none;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(80, 80, 80, 0.2);  /* 黑色半透明遮罩 */
    z-index: -1;
    pointer-events: none;
}ointer-events: none;
}

/* ================= 页面滚动容器 ================= */
.wraps {
    position: relative;
    z-index: 1;
    width: 100%;
}

.pages {
    position: relative;
    width: 100%;
    min-height: 100vh;
}

/* ================= 全局 Toast 提示框 ================= */
.toast-message {
    position: fixed;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    padding: 12px 30px;
    border-radius: 30px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 1px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: top 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275),
                opacity 0.4s ease;
}

.toast-message.show {
    top: 30px;
    opacity: 1;
}

/* ================= 动画 ================= */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}