/* 视频背景容器固定在页面后方，用静帧兜底是为了避免视频未就绪时出现空白。 */
        .video-hero--fixed {
            height: 100vh;
        }

body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: var(--blog-white);
            color: var(--blog-black);
            line-height: 1.6;
        }

/* 导航栏 */
        .header {
            background: transparent;
            backdrop-filter: none;
            border-bottom: none;;
            padding: 16px 0;
            /*position: sticky;*/
            top: 0;
            z-index: 100;
        }

.header .container {
            max-width: 90%;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

.header .nav {
            padding: 10px 20px;
            gap: 34px;
            overflow: visible;
            border: 1px solid rgba(255, 255, 255, 0.60);
            border-radius: 999px;
            position: relative;
            isolation: isolate;
            background:
                radial-gradient(circle at 8% 38%, rgba(255, 255, 255, 0.78) 0 5px, transparent 6px),
                radial-gradient(circle at 15% 68%, rgba(144, 212, 165, 0.22) 0 6px, transparent 7px),
                radial-gradient(circle at 31% 30%, rgba(255, 252, 229, 0.62) 0 4px, transparent 5px),
                radial-gradient(circle at 49% 72%, rgba(255, 255, 255, 0.58) 0 6px, transparent 7px),
                radial-gradient(circle at 72% 28%, rgba(145, 213, 238, 0.22) 0 7px, transparent 8px),
                radial-gradient(circle at 90% 64%, rgba(255, 250, 220, 0.56) 0 5px, transparent 6px),
                linear-gradient(135deg, rgba(255, 255, 255, 0.66), rgba(232, 250, 255, 0.42) 43%, rgba(255, 247, 210, 0.32));
            box-shadow:
                0 16px 34px rgba(72, 126, 154, 0.14),
                0 2px 12px rgba(255, 255, 255, 0.28),
                inset 0 1px 0 rgba(255, 255, 255, 0.76),
                inset 0 -1px 0 rgba(142, 205, 177, 0.20);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

.header .nav::before,
.header .nav::after {
            content: "";
            position: absolute;
            top: 50%;
            width: 92px;
            height: 34px;
            pointer-events: none;
            z-index: 0;
            opacity: 0.82;
            background:
                radial-gradient(circle at 12% 50%, rgba(119, 195, 148, 0.36) 0 5px, transparent 6px),
                radial-gradient(circle at 26% 30%, rgba(255, 255, 255, 0.78) 0 4px, transparent 5px),
                radial-gradient(circle at 42% 66%, rgba(146, 211, 169, 0.30) 0 6px, transparent 7px),
                radial-gradient(circle at 62% 34%, rgba(255, 250, 220, 0.58) 0 4px, transparent 5px),
                linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.40), rgba(230, 248, 255, 0.24), transparent);
            border-top: 1px solid rgba(124, 194, 156, 0.34);
            transform: translateY(-50%);
            filter: blur(0.1px);
        }

.header .nav::before {
            left: -64px;
            border-radius: 999px 0 0 999px;
            box-shadow: 18px -12px 0 -16px rgba(255, 255, 255, 0.78);
        }

.header .nav::after {
            right: -64px;
            border-radius: 0 999px 999px 0;
            transform: translateY(-50%) scaleX(-1);
            box-shadow: 18px -12px 0 -16px rgba(255, 255, 255, 0.78);
        }

.header .nav a {
            color: #1f3042;
            z-index: 1;
            padding: 3px 8px 4px;
            border-radius: 999px;
            background:
                radial-gradient(circle at 12% 18%, rgba(255, 255, 255, 0.54) 0 3px, transparent 4px),
                linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0));
            text-shadow:
                0 1px 0 rgba(255, 255, 255, 0.82),
                0 7px 16px rgba(45, 84, 105, 0.13);
            transition: color 0.25s ease, transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
        }

.header .nav a::before {
            content: "";
            position: absolute;
            left: 50%;
            top: -8px;
            width: 13px;
            height: 13px;
            pointer-events: none;
            opacity: 0;
            border-radius: 50%;
            background:
                radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.86) 0 2px, transparent 3px),
                radial-gradient(circle at 50% 12%, rgba(255, 255, 255, 0.62) 0 4px, transparent 5px),
                radial-gradient(circle at 88% 50%, rgba(255, 255, 255, 0.54) 0 4px, transparent 5px),
                radial-gradient(circle at 50% 88%, rgba(255, 250, 220, 0.58) 0 4px, transparent 5px),
                radial-gradient(circle at 12% 50%, rgba(255, 255, 255, 0.54) 0 4px, transparent 5px);
            transform: translateX(-50%) translateY(2px) scale(0.86);
            transition: opacity 0.25s ease, transform 0.25s ease;
        }

.header .nav a::after {
            bottom: -5px;
            height: 3px;
            background: linear-gradient(90deg, transparent, rgba(77, 178, 206, 0.86), rgba(132, 208, 160, 0.78), rgba(255, 245, 198, 0.58), transparent);
            box-shadow: 0 0 12px rgba(94, 188, 196, 0.24);
        }

.header .nav a:hover {
            color: #1f95bd;
            background:
                radial-gradient(circle at 14% 20%, rgba(255, 255, 255, 0.76) 0 4px, transparent 5px),
                linear-gradient(135deg, rgba(255, 255, 255, 0.32), rgba(223, 247, 255, 0.22));
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.64),
                0 8px 18px rgba(76, 151, 170, 0.10);
            text-shadow:
                0 1px 0 rgba(255, 255, 255, 0.88),
                0 9px 18px rgba(63, 151, 164, 0.18);
        }

.header .nav a:hover::before {
            opacity: 0.78;
            transform: translateX(-50%) translateY(0) scale(1);
        }

.header .blog-title {
            padding: 11px 24px 12px;
            position: relative;
            overflow: visible;
            border: 1px solid rgba(255, 255, 255, 0.66);
            border-radius: 26px 10px 26px 12px;
            box-shadow:
                0 16px 30px rgba(70, 128, 152, 0.14),
                0 2px 10px rgba(255, 255, 255, 0.24),
                inset 0 1px 0 rgba(255, 255, 255, 0.78),
                inset 0 -1px 0 rgba(158, 211, 177, 0.20);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            color: #20384c;
            background:
                radial-gradient(circle at 18% 24%, rgba(255, 255, 255, 0.82) 0 8px, transparent 9px),
                radial-gradient(circle at 86% 76%, rgba(143, 211, 164, 0.28) 0 12px, transparent 13px),
                linear-gradient(135deg, rgba(255, 255, 255, 0.64), rgba(235, 250, 255, 0.42) 52%, rgba(255, 248, 218, 0.30));
            background-clip: padding-box;
            -webkit-background-clip: padding-box;
            -webkit-text-fill-color: #20384c;
            text-shadow:
                0 1px 0 rgba(255, 255, 255, 0.74),
                0 8px 18px rgba(48, 95, 126, 0.14);
        }

.header .blog-title::before,
.header .blog-title::after {
            content: "";
            position: absolute;
            pointer-events: none;
            opacity: 0.70;
        }

.header .blog-title::before {
            left: -8px;
            top: -7px;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background:
                radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.90) 0 3px, transparent 4px),
                radial-gradient(circle at 50% 13%, rgba(255, 255, 255, 0.70) 0 7px, transparent 8px),
                radial-gradient(circle at 87% 50%, rgba(255, 255, 255, 0.64) 0 7px, transparent 8px),
                radial-gradient(circle at 50% 87%, rgba(255, 250, 220, 0.68) 0 7px, transparent 8px),
                radial-gradient(circle at 13% 50%, rgba(255, 255, 255, 0.64) 0 7px, transparent 8px);
            filter: drop-shadow(0 3px 8px rgba(78, 137, 154, 0.10));
        }

.header .blog-title::after {
            right: -10px;
            bottom: -4px;
            width: 38px;
            height: 18px;
            border-radius: 999px 0 999px 0;
            border-top: 1px solid rgba(112, 185, 142, 0.44);
            border-left: 1px solid rgba(112, 185, 142, 0.34);
            transform: rotate(-12deg);
            box-shadow:
                -12px -4px 0 -6px rgba(125, 198, 147, 0.38),
                -22px 2px 0 -8px rgba(255, 255, 255, 0.48);
        }

/* 主内容区 */
        .container {
            max-width: 100%;
            margin: 40px auto;
            padding: 0 50px;
            position: relative;
            z-index: 1;
            display: flex;
            gap: 40px;
        }

/* 左侧文章区域 */
        .main-content {
            width: 880px;           /* 固定宽度 */
            flex: none;             /* 禁止伸缩 */
            max-width: 100%;
        }

/* 右侧侧边栏 */
        .sidebar {
            flex: 3;
            display: flex;
            flex-direction: column;
            align-items: flex-end;   /* 内部卡片靠右 */
        }

/* 关于我卡片 */
        .about-card {
            width: 350px;
            margin-right: 50px;
            background: rgba(255, 255, 255, 0.6);   /* 纯白半透明 */
            backdrop-filter: blur(8px);              /* 毛玻璃效果 */
            border-radius: var(--blog-radius-card);
            padding: 20px 16px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            min-height: 240px;               /* 最小高度 */
            display: flex;
            flex-direction: column;
            justify-content: center;     /* 垂直居中 */
            overflow: auto;            /* 允许滚动 */
        }

.about-card .icon {
            font-size: 48px;
            margin-bottom: 16px;
            line-height: 1;
        }

.about-card .name {
            font-size: 16px;
            font-weight: 600;
            color: var(--blog-black);
            margin-bottom: 8px;
        }

.about-card .email {
            font-size: 14px;
            color: #000000;          /* 纯黑色，最深 */
            font-weight: 500;        /* 中等粗细，可选 */
            margin-bottom: 12px;
            word-break: break-all;
        }

.about-card .motto {
            font-size: 14px;
            color: var(--blog-black);
            line-height: 1.2;
            margin-bottom: 10px;
        }

.about-card .time-display {
            font-size: 24px;
            font-weight: 600;
            color: var(--blog-black);
            margin-bottom: 12px;
        }

.about-card .calendar-display {
            font-size: 12px;
        }

.about-card .calendar-header {
            font-size: 14px;
            font-weight: 600;
            color: var(--blog-black);
            margin-bottom: 8px;
            text-align: center;
        }

.about-card .calendar-weekdays {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
            color: var(--blog-gray);
            margin-bottom: 4px;
            font-size: 10px;
            text-align: center;
        }

.about-card .calendar-days {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
            gap: 2px;
            text-align: center;
        }

.about-card .calendar-days span {
            font-size: 11px;
            padding: 2px 0;
        }

.about-card .calendar-days span.today {
            background: var(--blog-red);
            color: var(--blog-white);
            border-radius: 50%;
        }

.about-card .stats-row {
            display: flex;
            justify-content: space-between;
            text-align: center;
        }

.about-card .stat-item {
            flex: 1;
        }

.about-card .stat-num {
            font-size: 18px;
            font-weight: 600;
            color: var(--blog-black);
        }

.about-card .stat-label {
            font-size: 12px;
            color: var(--blog-gray);
            margin-top: 4px;
        }

/* 文章网格 */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, 280px);
            gap: 24px;
        }

.post-card {
            background: rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(8px);
            border-radius: var(--blog-radius-card);
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            transition: transform 0.2s;
            cursor: pointer;
            text-decoration: none;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 20px;
        }

.post-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        }

.post-card .content {
            padding: 16px;
        }

.post-card .title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--blog-black);
            text-decoration: none;
            display: block;
            line-height: 1.4;
        }

.post-card .meta-row {
            display: flex;
            gap: 16px;                     /* 两个元素之间的间隔，可调小至 4px 或 8px */
            font-size: 12px;
            color: var(--blog-gray);
            margin-top: 4px;
        }

.post-card .title:hover {
            color: var(--blog-red);
        }

.post-card .meta {
            font-size: 13px;
            color: #3a3a3a;
            text-decoration: none;
            
        }

/* 专栏列表容器 */
        .section-title {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--blog-black);
        }

.columns-container {
            background: rgba(255, 255, 255, 0.5);  /* 纯白透明（半透白） */
            /* 已去掉 backdrop-filter */
            border-radius: var(--blog-radius-card);
            padding: 24px;
            box-shadow: var(--blog-card-shadow);
            width: 500px;            /* 固定宽度 */
            margin-left: 0;          /* 确保左对齐 */

        }

.columns-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

.column-card {
            display: block;
            padding: 12px 16px;
            text-decoration: none;
            transition: color 0.3s;
        }

.column-card:hover .column-name {
            color: #1b5e2a;
        }

.column-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--blog-black);
            margin-bottom: 6px;
        }

.column-desc {
            font-size: 14px;
            color: var(--blog-gray);
            line-height: 1.5;
        }

/* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 40px;
        }

.pagination a, .pagination span {
            padding: 10px 16px;
            background: var(--blog-white);
            border-radius: 8px;
            text-decoration: none;
            color: var(--blog-black);
            font-size: 14px;
            box-shadow: var(--blog-card-shadow);
        }

.pagination a:hover {
            background: var(--blog-red);
            color: var(--blog-white);
        }

.pagination .current {
            background: var(--blog-red);
            color: var(--blog-white);
        }

/* 空状态 */
        .empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--blog-gray);
        }