:root {
    --bg: #f6f7fb;
    --card-bg: #ffffff;
    --border: #e8eaf1;
    --title: #171c2e;
    --muted: #6b7488;
    --path-bg: #f1f3f9;
    --path-color: #5a6480;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--title);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    overflow-x: hidden;
}

/* 背景装饰光斑 */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.35;
    pointer-events: none;
    z-index: 0;
}

.orb-1 {
    width: 420px;
    height: 420px;
    background: #c7d2fe;
    top: -120px;
    left: -100px;
}

.orb-2 {
    width: 360px;
    height: 360px;
    background: #fbcfe8;
    bottom: -100px;
    right: -80px;
}

.orb-3 {
    width: 280px;
    height: 280px;
    background: #a5f3fc;
    top: 40%;
    right: 12%;
}

.portal {
    position: relative;
    z-index: 1;
    width: min(1080px, 100%);
    animation: fadeIn 0.55s ease;
}

/* 头部 */
.hero {
    text-align: center;
    margin-bottom: 36px;
}

.hero-badge {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 1px;
    color: #4f46e5;
    background: #eef0ff;
    border: 1px solid #dfe3ff;
    padding: 5px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
    font-weight: 600;
}

.hero h1 {
    margin: 0 0 10px;
    font-size: clamp(28px, 4.5vw, 42px);
    font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(120deg, #171c2e 30%, #4f46e5 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sub {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

/* 卡片网格 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 18px;
}

.card {
    --card-accent: #4f46e5;
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px 20px;
    position: relative;
    overflow: hidden;
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: var(--card-accent);
    opacity: 0;
    transition: opacity 0.22s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: color-mix(in srgb, var(--card-accent) 45%, #ffffff);
    box-shadow: 0 16px 34px color-mix(in srgb, var(--card-accent) 16%, transparent);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 46px;
    height: 46px;
    border-radius: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--card-accent);
    background: color-mix(in srgb, var(--card-accent) 10%, #ffffff);
    margin-bottom: 14px;
    transition: transform 0.22s ease;
}

.card:hover .card-icon {
    transform: scale(1.08);
}

.card-icon svg {
    width: 24px;
    height: 24px;
}

.name {
    margin: 0 0 6px;
    font-size: 17px;
    font-weight: 700;
}

.desc {
    margin: 0 0 14px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--muted);
    min-height: 42px;
}

.path {
    display: inline-block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    color: var(--path-color);
    background: var(--path-bg);
    padding: 3px 10px;
    border-radius: 999px;
}

.go {
    position: absolute;
    right: 18px;
    bottom: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--card-accent);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.card:hover .go {
    opacity: 1;
    transform: translateX(0);
}

/* 底部 */
.foot {
    margin-top: 30px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 640px) {
    body {
        padding: 28px 14px;
        align-items: flex-start;
    }

    .hero {
        margin-bottom: 26px;
    }

    .desc {
        min-height: auto;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}