:root {
    --ink: #16201a;
    --muted: #647066;
    --paper: #f6f1e6;
    --line: rgba(22, 32, 26, 0.14);
    --shadow: 0 30px 80px rgba(45, 54, 44, 0.16);
    --accent: #14b8a6;
}

* { box-sizing: border-box; }

body {
    min-height: 100vh;
    margin: 0;
    color: var(--ink);
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    background:
        radial-gradient(circle at 12% 18%, rgba(20, 184, 166, 0.18), transparent 28%),
        radial-gradient(circle at 82% 12%, rgba(38, 122, 255, 0.15), transparent 30%),
        linear-gradient(135deg, #f8f0df 0%, #edf3e6 52%, #e7efe8 100%);
}

body::before {
    position: fixed;
    inset: 0;
    pointer-events: none;
    content: "";
    background-image:
        linear-gradient(rgba(22, 32, 26, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 32, 26, 0.05) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 82%);
}

.page-shell {
    width: min(1400px, calc(100% - 32px));
    margin: 0 auto;
    padding: 20px 0 100px;
    position: relative;
}

.top-bar {
    display: flex;
    align-items: center;
    margin-bottom: 28px;
}

.back-link {
    width: 38px;
    height: 38px;
    display: inline-grid;
    place-items: center;
    color: #9a5c17;
    border: 1px solid #9a5c17;
    border-radius: 999px;
    background: rgba(255, 252, 243, 0.72);
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
    text-decoration: none;
    flex-shrink: 0;
}

.back-link:hover,
.back-link:focus-visible {
    background: rgba(255, 252, 243, 0.92);
    outline: none;
}

.page-title {
    flex: 1;
    margin: 0;
    font-size: 1.8em;
    font-weight: 800;
    letter-spacing: -0.03em;
    text-align: center;
}

/* 网格布局，一行5个，方便后续增加更多入口 */
.entry-masonry {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

.entry-card {
    padding: 20px;
    text-decoration: none;
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 252, 243, 0.72);
    box-shadow: 0 12px 32px rgba(45, 54, 44, 0.10);
    backdrop-filter: blur(14px);
    transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
    text-align: center;
}

.entry-card:hover,
.entry-card:focus-visible {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 20px 45px rgba(45, 54, 44, 0.16);
    outline: none;
}

.entry-icon {
    display: inline-block;
    font-size: 28px;
    line-height: 1;
    margin-right: 8px;
    vertical-align: middle;
}

.entry-title {
    display: inline-block;
    font-size: 17px;
    font-weight: 800;
    margin-bottom: 6px;
    vertical-align: middle;
}

.entry-desc {
    display: block;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.6;
}

@media (max-width: 820px) {
    .page-shell {
        width: min(100% - 28px, 640px);
        padding: 36px 0;
    }
    .entry-masonry {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }
    .entry-card {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .entry-masonry {
        grid-template-columns: 1fr;
    }
}

.sub-placeholder {
    margin-top: 40px;
    text-align: center;
    color: var(--muted);
    font-size: 16px;
    padding: 60px 20px;
    border: 2px dashed var(--line);
    border-radius: 20px;
    background: rgba(255, 252, 243, 0.5);
}