/* 首页 · 赛博实训风 + 粘性页脚 */
html:has(.fe-index-page) {
    background: var(--bg-primary, #f5f7fa);
}

.fe-index-page {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    overflow-x: hidden;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-image:
        linear-gradient(color-mix(in srgb, var(--primary-color, #0288d1) 3.5%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--primary-color, #0288d1) 3.5%, transparent) 1px, transparent 1px),
        radial-gradient(ellipse 80% 45% at 50% -10%, color-mix(in srgb, var(--primary-color, #0288d1) 8%, transparent), transparent 65%);
    background-size: 32px 32px, 32px 32px, 100% 100%;
    background-attachment: fixed;
}

.fe-index-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    min-height: calc(100dvh - var(--fe-navbar-height, 56px));
    box-sizing: border-box;
}

.fe-index-page .fe-footer {
    margin-top: auto;
    flex-shrink: 0;
    width: 100%;
}

.fe-index-content {
    flex: 1 0 auto;
    width: 100%;
    max-width: min(1160px, 100%);
    padding: 16px 20px 0;
    box-sizing: border-box;
}

.fe-index-header {
    position: relative;
    text-align: center;
    margin-bottom: 22px;
    padding: 26px 24px 22px;
    border-radius: 14px;
    overflow: hidden;
}

.fe-index-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8%;
    right: 8%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color, #0288d1), transparent);
    opacity: 0.9;
    pointer-events: none;
}

.fe-index-header .fe-cyber-chip {
    margin-bottom: 10px;
}

.fe-index-header h1 {
    color: var(--primary-color);
    margin: 0 0 8px;
    font-size: clamp(1.35rem, 3vw, 1.85rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.fe-index-header p {
    color: var(--text-secondary);
    font-size: clamp(0.9rem, 2vw, 1.05rem);
    margin: 0 auto;
    max-width: 720px;
    line-height: 1.55;
}

.fe-index-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.fe-index-stat {
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color, #0288d1);
    background: color-mix(in srgb, var(--primary-color, #0288d1) 8%, var(--card-bg, #fff));
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 22%, transparent);
    border-radius: 999px;
}

.fe-quick-links {
    margin-bottom: 22px;
}

.fe-quick-links__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
    gap: 10px;
}

.fe-quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    min-height: 82px;
    padding: 10px 8px;
    border-radius: 10px;
    background: color-mix(in srgb, var(--card-bg, #fff) 92%, transparent);
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 16%, var(--border-color, #e2e8f0));
    box-shadow: var(--shadow-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.fe-quick-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px color-mix(in srgb, var(--primary-color, #0288d1) 16%, transparent);
    border-color: color-mix(in srgb, var(--primary-color, #0288d1) 42%, transparent);
    text-decoration: none;
}

.fe-quick-link.is-highlight {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.fe-quick-link__group {
    font-size: 10px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.fe-quick-link__label {
    font-size: 13px;
    text-align: center;
    line-height: 1.3;
}

.fe-index-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.fe-index-card {
    padding: 20px 22px;
    min-width: 0;
}

.fe-index-card h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
    margin: 0 0 12px;
    font-size: 1.05rem;
    line-height: 1.35;
}

.fe-index-card ul {
    padding: 0;
    list-style: none;
    margin: 0;
}

.fe-index-card li {
    margin-bottom: 8px;
    padding-left: 18px;
    position: relative;
    font-size: 0.875rem;
    line-height: 1.45;
}

.fe-index-card li::before {
    content: '▸';
    color: var(--primary-color);
    font-size: 12px;
    position: absolute;
    left: 0;
    top: 2px;
}

.fe-index-card--contact {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border-color: transparent;
}

.fe-index-card--contact h2 {
    color: var(--text-inverse);
    border-bottom-color: rgba(255, 255, 255, 0.28);
}

.fe-index-card--contact li::before {
    color: rgba(255, 255, 255, 0.85);
}

.fe-index-note {
    padding: 16px 18px;
    text-align: center;
    font-size: 0.875rem;
    font-style: italic;
    color: var(--text-secondary);
    margin: 0 0 16px;
    border-left: 4px solid var(--primary-color);
}

.fe-index-note p {
    margin: 0;
}

/* 仅作用于正文内普通链接，不覆盖按钮式 CTA */
.fe-index-content a:not(.fe-hero-cta):not(.fe-track-link):not(.fe-hub-preview__card):not(.fe-quick-access__item):not(.fe-quick-link) {
    color: var(--primary-color);
    font-weight: 500;
}

@media (max-width: 768px) {
    .fe-index-content {
        padding: 12px 14px 0;
    }

    .fe-quick-links__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .fe-index-stats {
        gap: 6px;
    }

    .fe-index-stat {
        font-size: 11px;
        padding: 4px 10px;
    }
}

@media (max-width: 420px) {
    .fe-quick-links__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .fe-quick-link {
        transition: none;
    }

    .fe-quick-link:hover {
        transform: none;
    }
}

/* 智能模块预览入口 */
.fe-hub-preview {
    margin-bottom: 1.5rem;
    padding: 1.25rem 1.35rem !important;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.04), rgba(2, 136, 209, 0.06)) !important;
    border: 1px solid rgba(2, 136, 209, 0.15) !important;
}

.fe-hub-preview__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.fe-hub-preview__head .fe-cyber-section-title {
    margin: 0;
}

.fe-hub-preview__badges {
    display: flex;
    gap: 0.4rem;
}

.fe-hub-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    color: #0288d1;
    border: 1px solid rgba(2, 136, 209, 0.35);
    background: rgba(2, 136, 209, 0.08);
}

.fe-hub-badge--beta {
    color: #7c3aed;
    border-color: rgba(124, 58, 237, 0.35);
    background: rgba(124, 58, 237, 0.08);
}

.fe-hub-badge--local {
    color: #059669;
    border-color: rgba(5, 150, 105, 0.35);
    background: rgba(5, 150, 105, 0.08);
}

.fe-hub-preview__hint {
    margin: 0 0 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
}

.fe-hub-preview__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.85rem;
}

.fe-hub-preview__card {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem 1.1rem;
    border-radius: 12px;
    text-decoration: none;
    background: var(--bg-secondary, #fff);
    border: 1px solid rgba(2, 136, 209, 0.2);
    box-shadow: 0 4px 16px rgba(2, 136, 209, 0.08);
    transition: transform 0.15s, box-shadow 0.15s;
}

.fe-hub-preview__card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(2, 136, 209, 0.15);
    border-color: rgba(2, 136, 209, 0.4);
}

.fe-hub-preview__icon {
    font-size: 1.35rem;
}

.fe-hub-preview__card strong {
    color: var(--text-primary, #0f172a);
    font-size: 0.95rem;
}

.fe-hub-preview__card span:last-child {
    font-size: 0.78rem;
    color: var(--text-secondary, #64748b);
}