/* 黑洞加速器主题 — 深紫 + 青绿，与旧版蓝色渐变区分 */
:root {
    --bh-primary: #6d28d9;
    --bh-primary-dark: #5b21b6;
    --bh-accent: #14b8a6;
    --bh-accent-light: #2dd4bf;
    --bh-dark: #0f172a;
    --bh-dark-soft: #1e293b;
    --bh-text: #334155;
    --bh-text-muted: #64748b;
    --bh-bg: #f1f5f9;
    --bh-surface: #ffffff;
    --bh-border: #e2e8f0;
    --bh-radius: 12px;
    --bh-radius-lg: 16px;
    --bh-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
    --bh-transition: 0.25s ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body.bh-site {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--bh-text);
    line-height: 1.65;
    background: var(--bh-bg);
    margin: 0;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--bh-primary);
    text-decoration: none;
}

a:hover {
    color: var(--bh-primary-dark);
}

/* —— 导航 —— */
.z27fabnavbar {
    background: var(--bh-surface);
    border-bottom: 1px solid var(--bh-border);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.z27fabnavbar .navbar-brand img {
    height: 42px;
    width: auto;
}

.z27fabnav-link {
    color: var(--bh-text) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: color var(--bh-transition), background var(--bh-transition);
}

.z27fabnav-link:hover,
.z27fabnav-link:focus {
    color: var(--bh-primary) !important;
    background: rgba(109, 40, 217, 0.08);
}

.z27fabnavbar .navbar-toggler {
    border: 1px solid var(--bh-border);
    padding: 0.35rem 0.55rem;
}

.z27fabnavbar .navbar-collapse {
    background: var(--bh-surface);
}

@media (max-width: 991px) {
    .z27fabnavbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.5rem 0;
        max-height: 70vh;
        overflow-y: auto;
    }

    .z27fabnavbar .nav-link {
        padding: 0.5rem 0.25rem !important;
    }
}

/* —— 按钮 —— */
.z27fabbtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.35rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    transition: transform var(--bh-transition), box-shadow var(--bh-transition), background var(--bh-transition);
    white-space: normal;
    text-align: center;
    line-height: 1.3;
}

.z27fabbtn-primary {
    background: linear-gradient(135deg, var(--bh-accent) 0%, var(--bh-primary) 100%);
    color: #fff !important;
}

.z27fabbtn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(109, 40, 217, 0.35);
    color: #fff !important;
}

.z27fabbtn-outline {
    background: transparent;
    color: #fff !important;
    border: 2px solid rgba(255, 255, 255, 0.55);
}

.z27fabbtn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff !important;
    border-color: #fff;
}

.z27fabfeatures-section .z27fabbtn-outline,
.z27fabarticle-section .z27fabbtn-outline,
.z27fabknowledge-section .z27fabbtn-outline {
    color: var(--bh-primary) !important;
    border-color: var(--bh-primary);
    background: transparent;
}

.z27fabfeatures-section .z27fabbtn-outline:hover,
.z27fabarticle-section .z27fabbtn-outline:hover {
    background: rgba(109, 40, 217, 0.08);
    color: var(--bh-primary-dark) !important;
}

/* —— 通用区块 —— */
.z27fabsection {
    padding: 4rem 0;
}

.z27fabsection-head {
    margin-bottom: 2rem;
    max-width: 640px;
}

.z27fabsection-head.z27fabtext-center,
.z27fabsection-head.text-center {
    margin-left: auto;
    margin-right: auto;
}

.z27fabsection-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--bh-dark);
    margin-bottom: 0.6rem;
}

.z27fabsection-head p {
    color: var(--bh-text-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— Hero —— */
.z27fabhero-section {
    background: linear-gradient(145deg, var(--bh-dark) 0%, #312e81 45%, var(--bh-primary-dark) 100%);
    color: #fff;
    padding: clamp(3rem, 8vw, 5.5rem) 0;
    position: relative;
    overflow: hidden;
}

.z27fabhero-section::after {
    content: "";
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.25) 0%, transparent 70%);
    top: -120px;
    right: -80px;
    pointer-events: none;
}

.z27fabhero-content {
    position: relative;
    z-index: 1;
}

.z27fabhero-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: rgba(20, 184, 166, 0.2);
    border: 1px solid rgba(45, 212, 191, 0.4);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--bh-accent-light);
    margin-bottom: 1rem;
}

.z27fabhero-title {
    font-size: clamp(1.85rem, 4.5vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.z27fabhero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.92;
    max-width: 540px;
    margin-bottom: 1.5rem;
}

.z27fabhero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z27fabhero-visual {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.z27fabhero-image {
    max-width: 280px;
    width: 100%;
    border-radius: var(--bh-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

/* —— Bento 优势 —— */
.z27fabfeatures-section {
    background: var(--bh-surface);
}

.z27fabbento-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
    gap: 1rem;
}

.z27fabbento-item {
    background: var(--bh-bg);
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius-lg);
    padding: 1.5rem;
    transition: border-color var(--bh-transition), box-shadow var(--bh-transition);
    overflow: hidden;
    min-height: 0;
}

.z27fabbento-item:hover {
    border-color: rgba(109, 40, 217, 0.35);
    box-shadow: var(--bh-shadow);
}

.z27fabbento-item.bento-large {
    grid-column: 1 / -1;
}

.z27fabbento-icon {
    font-size: 1.5rem;
    color: var(--bh-primary);
    margin-bottom: 0.75rem;
    display: block;
}

.z27fabbento-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bh-dark);
    margin-bottom: 0.5rem;
}

.z27fabbento-item p {
    font-size: 0.92rem;
    color: var(--bh-text-muted);
    margin: 0;
}

@media (max-width: 575px) {
    .z27fabbento-grid {
        grid-template-columns: 1fr;
    }

    .z27fabbento-item.bento-large {
        grid-column: 1;
    }
}

/* —— 数据条 —— */
.z27fabstats-section {
    padding: 0;
    background: var(--bh-dark);
}

.z27fabstats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}

.z27fabstat-item {
    text-align: center;
    padding: 2rem 1rem;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.z27fabstat-item:last-child {
    border-right: none;
}

.z27fabstat-number {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--bh-accent-light);
    line-height: 1.2;
}

.z27fabstat-label {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-top: 0.35rem;
}

@media (max-width: 767px) {
    .z27fabstats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .z27fabstat-item {
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding: 1.25rem 0.75rem;
    }

    .z27fabstat-item:nth-child(2n) {
        border-right: none;
    }

    .z27fabstat-item:nth-last-child(-n+2) {
        border-bottom: none;
    }
}

/* —— 下载 —— */
.z27fabdownload-section {
    background: var(--bh-bg);
}

.z27fabdownload-card {
    background: var(--bh-surface);
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    box-shadow: var(--bh-shadow);
    border-left: 4px solid var(--bh-primary);
}

.z27fabdownload-card-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.z27fabdownload-card-head h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.2rem;
    color: var(--bh-dark);
}

.z27fabdownload-card-head p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--bh-text-muted);
}

.z27fabplatform-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
}

.z27fabandroid-icon {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.z27fabpc-icon {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.z27fabdownload-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem;
    flex: 1;
}

.z27fabdownload-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--bh-text);
    margin-bottom: 0.5rem;
    word-break: break-word;
}

.z27fabdownload-list li i {
    color: var(--bh-accent);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.z27fabdownload-action {
    margin-top: auto;
}

.z27fabdownload-action .z27fabbtn {
    width: 100%;
}

/* —— 安全保障 —— */
.z27fabsecurity-section {
    background: var(--bh-surface);
}

.z27fabsecurity-card {
    background: var(--bh-bg);
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius);
    padding: 1.25rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 200px;
}

.z27fabsecurity-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--bh-primary), var(--bh-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    flex-shrink: 0;
}

.z27fabsecurity-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--bh-dark);
    margin-bottom: 0.75rem;
}

.z27fabsecurity-features {
    flex: 1;
    padding: 0.75rem;
    background: var(--bh-surface);
    border: 1px solid var(--bh-border);
    border-radius: 8px;
}

.z27fabfeature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--bh-text);
    margin-bottom: 0.5rem;
    word-break: break-word;
}

.z27fabfeature-item:last-child {
    margin-bottom: 0;
}

.z27fabfeature-item i {
    color: var(--bh-accent);
    flex-shrink: 0;
    margin-top: 0.15rem;
}

/* —— 知识 —— */
.z27fabknowledge-section {
    background: var(--bh-bg);
}

.z27fabknowledge-card {
    background: var(--bh-surface);
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius-lg);
    padding: 1.5rem;
    height: 100%;
    overflow: hidden;
}

.z27fabknowledge-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--bh-dark);
    margin-bottom: 0.65rem;
}

.z27fabknowledge-card p {
    font-size: 0.92rem;
    color: var(--bh-text-muted);
    margin: 0;
}

/* —— FAQ —— */
.z27fabfaq-section {
    background: var(--bh-surface);
}

.z27fabfaq-card {
    background: var(--bh-bg);
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius);
    padding: 1.25rem 1.35rem;
    height: 100%;
    overflow: hidden;
}

.z27fabfaq-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--bh-dark);
    margin-bottom: 0.5rem;
}

.z27fabfaq-card p {
    font-size: 0.9rem;
    color: var(--bh-text-muted);
    margin: 0;
}

/* —— 文章 —— */
.z27fabarticle-section {
    background: var(--bh-bg);
}

.z27fabarticle-card {
    border: 1px solid var(--bh-border) !important;
    border-radius: var(--bh-radius) !important;
    overflow: hidden;
    box-shadow: none !important;
    background: var(--bh-surface) !important;
}

.z27fabthumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

.z27fabarticle-card .card-body {
    padding: 0.85rem;
}

.z27fabarticle-card h3 a {
    color: var(--bh-dark);
    font-weight: 600;
}

.z27fabarticle-card h3 a:hover {
    color: var(--bh-primary);
}

/* —— 页脚 —— */
.z27fabfooter {
    background: var(--bh-dark);
    color: rgba(255, 255, 255, 0.75);
    padding: 3rem 0 1.5rem;
}

.z27fabfooter-desc {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}

.z27fabfooter-title {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.z27fabfooter-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z27fabfooter-links li {
    margin-bottom: 0.5rem;
}

.z27fabfooter-link {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.9rem;
    transition: color var(--bh-transition);
}

.z27fabfooter-link:hover {
    color: var(--bh-accent-light);
}

.z27fabfriend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z27fabfriend-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.88rem;
}

.z27fabfriend-links a:hover {
    color: var(--bh-accent-light);
}

.z27fabfooter-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 1.25rem;
    margin-top: 2rem;
    font-size: 0.88rem;
}

.z27fabfooter-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

.z27fabfooter-bottom a:hover {
    color: #fff;
}

/* —— 列表页 / 内页 —— */
.z27fabpage-main {
    padding: 2.5rem 0 3rem;
    background: var(--bh-bg);
    min-height: 50vh;
}

.z27fabpage-main .card {
    border: 1px solid var(--bh-border);
    border-radius: var(--bh-radius-lg);
    overflow: hidden;
    background: var(--bh-surface);
}

.z27fabpage-main .card-body {
    padding: 1.25rem;
}

.z27fabpage-header h1 {
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 700;
    color: var(--bh-dark);
}

.z27fabarticle-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--bh-text);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z27fabarticle-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.z27fabmeta-tags .z27fabtagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--bh-bg);
    border: 1px solid var(--bh-border);
    border-radius: 6px;
    font-size: 0.85rem;
}

.z27fabthumb-list,
.z27fabthumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: 8px;
}

.z27fabthumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    border-radius: 6px;
}

.z27fabthumb-cover {
    max-width: 100%;
    width: 100%;
    height: auto;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--bh-radius);
}

.pagebar .pagelist,
.z27fabpages .pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagebar .pagelist li {
    display: inline-flex;
    margin: 0;
}

/* —— 移动端 Hero / 按钮 —— */
@media (max-width: 767px) {
    .z27fabsection {
        padding: 2.75rem 0;
    }

    .z27fabhero-section {
        padding: 2.5rem 0;
    }

    .z27fabhero-buttons {
        flex-direction: column;
    }

    .z27fabhero-buttons .z27fabbtn {
        width: 100%;
    }

    .z27fabhero-visual {
        margin-top: 0.5rem;
    }

    .z27fabhero-image {
        max-width: 220px;
    }

    .z27fabdownload-card {
        padding: 1.15rem;
    }

    .z27fabdownload-card-head {
        flex-direction: row;
        align-items: flex-start;
    }

    .z27fabsecurity-card {
        min-height: auto;
    }

    .z27fabfooter .row > [class*="col-"] {
        margin-bottom: 0.5rem;
    }

    #article .z27fabthumb-home {
        height: 96px;
    }

    #article .h6 {
        font-size: 0.92rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .listbox .e2 li {
        padding-bottom: 0.75rem !important;
        margin-bottom: 0.75rem !important;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
        line-height: 1.35;
    }

    .z27fabthumb-list,
    .z27fabthumb-related {
        height: 72px !important;
    }

    .z27fabthumb-side {
        height: 50px !important;
    }

    .z27fabthumb-cover {
        max-height: 200px;
    }

    .z27fabpage-main {
        padding: 1.75rem 0 2rem;
    }

    .z27fabpage-main .card-body {
        padding: 1rem;
    }
}

@media (max-width: 575px) {
    #article .z27fabthumb-home {
        height: 88px;
    }

    .z27fabthumb-list,
    .z27fabthumb-related {
        height: 64px !important;
    }

    .z27fabthumb-cover {
        max-height: 180px;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }
}

/* Bootstrap 覆盖：统一边框不溢出 */
.z27fabcontainer {
    max-width: 1140px;
    padding-left: 15px;
    padding-right: 15px;
}

.row {
    --bs-gutter-x: 1rem;
}

.card.shadow-sm {
    box-shadow: var(--bh-shadow) !important;
}