/* 公共字体设置 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    overflow-x: hidden;
}

/* 背景容器 */
.dynamic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: #f8f9fa;
    overflow: hidden;
}



/* iOS 液态玻璃导航栏效果 */
nav.noise-light {
    overflow: visible !important;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.7) 0%,
        rgba(255, 255, 255, 0.65) 50%,
        rgba(252, 252, 252, 0.72) 100%
    ) !important;
    backdrop-filter: saturate(180%) blur(24px) !important;
    -webkit-backdrop-filter: saturate(180%) blur(24px) !important;
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.1) !important;
    box-shadow:
        0 1px 0 0 rgba(255, 255, 255, 0.8) inset,
        0 2px 8px -2px rgba(0, 0, 0, 0.08),
        0 6px 20px -6px rgba(0, 0, 0, 0.1) !important;
}

/* 顶部高光 + 噪点纹理 */
nav.noise-light::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0) 0%,
            rgba(255, 255, 255, 0.8) 20%,
            rgba(255, 255, 255, 0.9) 50%,
            rgba(255, 255, 255, 0.8) 80%,
            rgba(255, 255, 255, 0) 100%
        ),
        url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNTAiIGhlaWdodD0iMTUwIj4KICA8ZmlsdGVyIGlkPSJub2lzZTEiPgogICAgPGZlVHVyYnVsZW5jZSB0eXBlPSJmcmFjdGFsTm9pc2UiIGJhc2VGcmVxdWVuY3k9IjAuOCIgbnVtT2N0YXZlcz0iNCIvPgogICAgPGZlQ29sb3JNYXRyaXggdHlwZT0ic2F0dXJhdGUiIHZhbHVlcz0iMC45NSIvPgogIDwvZmlsdGVyPgogIDxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbHRlcj0idXJsKCNub2lzZTEpIiBvcGFjaXR5PSIwLjA0Ii8+Cjwvc3ZnPg==');
    background-size: 100% 1px, 60px 60px;
    background-position: 0 0, 0 0;
    background-repeat: no-repeat, repeat;
    pointer-events: none;
    opacity: 0.6;
    mix-blend-mode: overlay;
    z-index: 1;
}

/* 底部微妙渐变 */
nav.noise-light::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        rgba(0, 0, 0, 0) 0%,
        rgba(0, 0, 0, 0.05) 20%,
        rgba(0, 0, 0, 0.08) 50%,
        rgba(0, 0, 0, 0.05) 80%,
        rgba(0, 0, 0, 0) 100%
    );
    pointer-events: none;
}

/* 导航内容容器 */
nav.noise-light > div {
    position: relative;
    z-index: 2;
}

/* 导航链接玻璃悬停效果 */
nav.noise-light a {
    position: relative;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
}

nav.noise-light a:hover {
    background: rgba(0, 0, 0, 0.03) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* 兼容性：非导航栏的噪点效果 */
.noise-light:not(nav) {
    position: relative;
    overflow: hidden;
}

.noise-light:not(nav)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNTAiIGhlaWdodD0iMTUwIj4KICA8ZmlsdGVyIGlkPSJub2lzZSI+CiAgICA8ZmVUdXJidWxlbmNlIHR5cGU9ImZyYWN0YWxOb2lzZSIgYmFzZUZyZXF1ZW5jeT0iMC44IiBudW1PY3RhdmVzPSI0IiAvPgogICAgPGZlQ29sb3JNYXRyaXggdHlwZT0ic2F0dXJhdGUiIHZhbHVlcz0iMSIvPgogIDwvZmlsdGVyPgogIDxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbHRlcj0idXJsKCNub2lzZSkiIG9wYWNpdHk9IjAuMTUiLz4KPC9zdmc+');
    background-size: 60px 60px;
    pointer-events: none;
    opacity: 0.6;
    mix-blend-mode: multiply;
}

/* 时间戳样式优化 - 平滑内敛 */
.timestamp-display {
    font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.375rem 0.5rem;
    border-radius: 0.375rem;
    min-width: 7rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid;
    box-shadow: none;
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.timestamp-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1MCIgaGVpZ2h0PSI1MCI+CiAgPGZpbHRlciBpZD0idGltZXN0YW1wLW5vaXNlIj4KICAgIDxmZVR1cmJ1bGVuY2UgdHlwZT0iZnJhY3RhbE5vaXNlIiBiYXNlRnJlcXVlbmN5PSIxLjIiIG51bU9jdGF2ZXM9IjIiLz4KICAgIDxmZUNvbG9yTWF0cml4IHR5cGU9InNhdHVyYXRlIiB2YWx1ZXM9IjAuOCIvPgogIDwvZmlsdGVyPgogIDxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbHRlcj0idXJsKCN0aW1lc3RhbXAtbm9pc2UpIiBvcGFjaXR5PSIwLjA1Ii8+Cjwvc3ZnPg==');
    background-size: 20px 20px;
    pointer-events: none;
    opacity: 0.4;
    mix-blend-mode: overlay;
}

/* 标准时间戳（昨天、今天、明天） - 现代艺术风格 */
.timestamp-standard {
    background: #f8fafc;
    color: #64748b;
    text-shadow: none;
    border-color: #e2e8f0;
}

.timestamp-standard:hover {
    background: #f1f5f9;
    color: #475569;
    box-shadow: none;
}

/* 自定义时间戳 - 现代艺术风格 */
.timestamp-custom {
    background: #fafafa;
    color: #78716c;
    text-shadow: none;
    border-color: #e5e5e5;
}

.timestamp-custom:hover {
    background: #f5f5f5;
    color: #57534e;
    box-shadow: none;
}

/* 移除时间戳顶部高光效果 */