/* 白鲸加速器 — 深海青绿主题 */
:root {
    --bj-primary: #0e7c86;
    --bj-primary-dark: #065a62;
    --bj-primary-light: #14a3b0;
    --bj-accent: #f59e0b;
    --bj-accent-soft: rgba(245, 158, 11, 0.12);
    --bj-bg: #f4f8f9;
    --bj-surface: #ffffff;
    --bj-text: #1a2e35;
    --bj-text-muted: #5a7179;
    --bj-border: #d4e4e8;
    --bj-radius: 12px;
    --bj-radius-lg: 20px;
    --bj-shadow: 0 4px 24px rgba(14, 124, 134, 0.08);
    --bj-shadow-hover: 0 12px 32px rgba(14, 124, 134, 0.14);
    --bj-nav-h: 68px;
    --bj-transition: 0.25s ease;
}

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

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

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

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

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

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

/* —— 导航 —— */
.z02c4bnavbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--bj-border);
    padding: 0.65rem 0;
    box-shadow: none;
}

.z02c4bnavbar-brand img {
    height: 42px;
    width: auto;
}

.z02c4bnav-link {
    color: var(--bj-text) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: background var(--bj-transition), color var(--bj-transition);
}

.z02c4bnav-link:hover {
    color: var(--bj-primary) !important;
    background: rgba(14, 124, 134, 0.06);
}

.navbar-toggler {
    border: 1px solid var(--bj-border);
    padding: 0.4rem 0.55rem;
}

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

@media (max-width: 991px) {
    .z02c4bnavbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        border: 1px solid var(--bj-border);
        border-radius: var(--bj-radius);
        max-height: 70vh;
        overflow-y: auto;
    }

    .z02c4bnavbar .nav-link {
        padding: 0.5rem 0.35rem !important;
    }
}

/* —— 首页 Hero —— */
.z02c4bhero-section {
    background: linear-gradient(145deg, var(--bj-primary-dark) 0%, var(--bj-primary) 45%, var(--bj-primary-light) 100%);
    color: #fff;
    padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(3rem, 6vw, 4.5rem);
    position: relative;
    overflow: hidden;
}

.z02c4bhero-section::after {
    content: "";
    position: absolute;
    right: -8%;
    bottom: -20%;
    width: min(480px, 70vw);
    height: min(480px, 70vw);
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.z02c4bhero-content {
    position: relative;
    z-index: 1;
}

.z02c4bhero-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.35rem 0.85rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    margin-bottom: 1rem;
}

.z02c4bhero-title {
    font-size: clamp(1.75rem, 4.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.z02c4bhero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.92;
    max-width: 540px;
    margin-bottom: 1.75rem;
    line-height: 1.7;
}

.z02c4bhero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z02c4bhero-buttons .btn {
    padding: 0.7rem 1.35rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
    border: none;
}

.z02c4bhero-buttons .btn-light {
    background: #fff;
    color: var(--bj-primary-dark);
}

.z02c4bhero-buttons .btn-light:hover {
    background: #f0fafb;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.z02c4bhero-buttons .btn-accent {
    background: var(--bj-accent);
    color: #1a2e35;
}

.z02c4bhero-buttons .btn-accent:hover {
    background: #e8900a;
    color: #1a2e35;
    transform: translateY(-2px);
}

.z02c4bhero-buttons .btn-outline-light {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.7);
    color: #fff;
}

.z02c4bhero-buttons .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.z02c4bhero-image-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.z02c4bhero-image {
    max-width: min(320px, 85%);
    border-radius: var(--bj-radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.z02c4bhero-image-shadow {
    display: none;
}

/* —— 通用区块 —— */
.bj-section {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
}

.bj-section-alt {
    background: var(--bj-surface);
}

.bj-section-title {
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 700;
    color: var(--bj-text);
    margin-bottom: 0.5rem;
}

.bj-section-lead {
    color: var(--bj-text-muted);
    max-width: 640px;
    margin: 0 auto 2rem;
    font-size: 0.98rem;
}

.bj-section-head {
    text-align: center;
    margin-bottom: 2rem;
}

/* —— 产品优势 #features —— */
.z02c4bfeature-card,
.bj-feature-card {
    background: var(--bj-surface);
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    padding: 1.5rem;
    height: 100%;
    box-shadow: var(--bj-shadow);
    transition: transform var(--bj-transition), box-shadow var(--bj-transition);
    overflow: hidden;
}

.z02c4bfeature-card:hover,
.bj-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bj-shadow-hover);
}

.z02c4bfeature-icon,
.bj-feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--bj-primary), var(--bj-primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
}

.bj-feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: center;
}

.bj-feature-card p {
    font-size: 0.9rem;
    color: var(--bj-text-muted);
    margin: 0;
    text-align: center;
    line-height: 1.6;
}

/* —— 简介条 —— */
.bj-intro-panel {
    background: linear-gradient(90deg, rgba(14, 124, 134, 0.06), rgba(245, 158, 11, 0.06));
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius-lg);
    padding: clamp(1.25rem, 3vw, 2rem);
    margin-top: 0.5rem;
}

.bj-intro-panel p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--bj-text);
    line-height: 1.75;
}

/* —— 数据 #stats —— */
.z02c4bstats-section {
    background: var(--bj-primary-dark);
    color: #fff;
    padding: clamp(2rem, 4vw, 3rem) 0;
}

.z02c4bstat-item {
    text-align: center;
    padding: 0.75rem 0.5rem;
}

.z02c4bstat-number {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.25rem;
}

.z02c4bstat-label {
    font-size: 0.88rem;
    opacity: 0.88;
}

/* —— 下载 #download —— */
.z02c4bdownload-section {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
    background: var(--bj-bg);
}

.z02c4bdownload-header h2,
.bj-section-title {
    color: var(--bj-primary-dark);
}

.z02c4bdownload-subtitle {
    color: var(--bj-text-muted);
    font-size: 0.95rem;
}

.z02c4bdownload-card {
    background: var(--bj-surface);
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    box-shadow: var(--bj-shadow);
    height: 100%;
    overflow: hidden;
    transition: box-shadow var(--bj-transition);
}

.z02c4bdownload-card:hover {
    box-shadow: var(--bj-shadow-hover);
}

.z02c4bdownload-card .card-body {
    padding: 1.35rem !important;
}

.z02c4bplatform-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #fff;
    flex-shrink: 0;
}

.z02c4bios-icon {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.z02c4bandroid-icon {
    background: linear-gradient(135deg, var(--bj-primary), var(--bj-primary-light));
}

.z02c4bdownload-info {
    background: rgba(14, 124, 134, 0.05);
    border: 1px solid var(--bj-border);
    border-radius: 10px;
    padding: 1rem;
}

.z02c4binfo-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
    color: var(--bj-text-muted);
}

.z02c4binfo-item:last-child {
    margin-bottom: 0;
}

.z02c4binfo-item i {
    color: var(--bj-primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z02c4bdownload-action .btn,
.z02c4bbtn.btn-primary {
    background: var(--bj-primary);
    border: none;
    color: #fff;
    border-radius: 10px;
    padding: 0.65rem 1.25rem;
    font-weight: 600;
    width: 100%;
    max-width: 100%;
    white-space: normal;
}

.z02c4bdownload-action .btn:hover,
.z02c4bbtn.btn-primary:hover {
    background: var(--bj-primary-dark);
    transform: translateY(-1px);
}

/* —— 安全 #security —— */
.z02c4bsecurity-section {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
    background: var(--bj-surface);
}

.z02c4bsecurity-card {
    background: var(--bj-bg);
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    padding: 1.25rem;
    height: 100%;
    box-shadow: none;
    transition: border-color var(--bj-transition);
}

.z02c4bsecurity-card:hover {
    border-color: var(--bj-primary-light);
}

.z02c4bsecurity-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--bj-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 0 auto 0.85rem;
}

.z02c4bsecurity-card h3 {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    color: var(--bj-primary-dark);
    margin-bottom: 0.75rem;
}

.z02c4bsecurity-features {
    background: var(--bj-surface);
    border: 1px solid var(--bj-border);
    border-radius: 8px;
    padding: 0.85rem;
}

.z02c4bfeature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--bj-text-muted);
    margin-bottom: 0.4rem;
}

.z02c4bfeature-item:last-child {
    margin-bottom: 0;
}

.z02c4bfeature-item i {
    color: var(--bj-primary);
    margin-top: 0.1rem;
}

.z02c4bcertificate-card {
    background: var(--bj-bg);
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    padding: 1.25rem;
    text-align: center;
    height: 100%;
}

.z02c4bcertificate-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 0.75rem;
    border-radius: 50%;
    background: var(--bj-accent-soft);
    color: var(--bj-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.z02c4bcertificate-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bj-text);
    margin-bottom: 0.35rem;
}

.z02c4bcertificate-card p {
    font-size: 0.82rem;
    color: var(--bj-text-muted);
    margin: 0;
}

/* —— 知识区 —— */
.bj-knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.bj-knowledge-item {
    background: var(--bj-surface);
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    padding: 1.15rem 1.25rem;
}

.bj-knowledge-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bj-primary-dark);
    margin-bottom: 0.4rem;
}

.bj-knowledge-item p {
    font-size: 0.88rem;
    color: var(--bj-text-muted);
    margin: 0;
    line-height: 1.6;
}

/* —— FAQ #faq —— */
#faq.bj-section-alt .card,
#faq .card {
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    box-shadow: none;
    height: 100%;
    overflow: hidden;
}

#faq .card-body {
    padding: 1.15rem 1.25rem;
}

#faq .card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bj-primary-dark);
    margin-bottom: 0.5rem;
}

#faq .card-text {
    font-size: 0.88rem;
    color: var(--bj-text-muted);
    margin: 0;
}

/* —— 文章 #article —— */
#article {
    background: var(--bj-bg);
}

#article .card {
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    overflow: hidden;
    box-shadow: var(--bj-shadow);
}

#article .card-body {
    padding: 0.85rem;
}

#article .z02c4bthumb-home {
    height: 110px !important;
    object-fit: cover;
    width: 100%;
}

#article h3.h5 {
    font-size: 0.9rem;
    line-height: 1.4;
    margin: 0;
}

#article h3.h5 a {
    color: var(--bj-text);
}

#article h3.h5 a:hover {
    color: var(--bj-primary);
}

#article .btn-outline-primary {
    border-color: var(--bj-primary);
    color: var(--bj-primary);
    border-radius: 8px;
}

#article .btn-outline-primary:hover {
    background: var(--bj-primary);
    color: #fff;
}

/* —— 页脚 —— */
.z02c4bfooter {
    background: var(--bj-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: clamp(2rem, 4vw, 3rem) 0 1.5rem;
}

.z02c4bfooter p {
    font-size: 0.88rem;
    opacity: 0.85;
}

.z02c4bfooter-title {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
}

.z02c4bfooter-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z02c4bfooter-links li {
    margin-bottom: 0.4rem;
}

.z02c4bfooter-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
}

.z02c4bfooter-link:hover {
    color: var(--bj-accent);
}

.z02c4bfriend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z02c4bfriend-links a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.85rem;
}

.z02c4bfriend-links a:hover {
    color: var(--bj-accent);
}

.z02c4bfooter-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 1.25rem;
    margin-top: 1.5rem;
    text-align: center;
}

.z02c4bfooter-bottom a {
    color: rgba(255, 255, 255, 0.75);
}

.z02c4bfooter-bottom a:hover {
    color: var(--bj-accent);
}

.z02c4bfooter-bottom p {
    margin-bottom: 0.35rem;
    font-size: 0.82rem;
}

/* —— 列表页 / 内页 —— */
.bj-page-hero {
    background: linear-gradient(135deg, var(--bj-primary-dark), var(--bj-primary));
    color: #fff;
    padding: 1.5rem 0;
    margin-bottom: 0;
}

.bj-page-hero h1 {
    font-size: 1.35rem;
    font-weight: 600;
    margin: 0 0 0.35rem;
}

.bj-page-hero p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.88;
}

.bj-inner-section {
    padding: 2rem 0 3rem;
}

.bj-inner-section .card {
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
    overflow: hidden;
}

.bj-inner-section .card-body {
    padding: 1.25rem;
}

.z02c4barticle-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--bj-text);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z02c4bthumb-cover {
    max-width: 100%;
    width: 100%;
    max-height: 240px;
    object-fit: cover;
    border: 1px solid var(--bj-border);
    border-radius: var(--bj-radius);
}

.z02c4barticle-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.z02c4bmeta-tags .z02c4btagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: rgba(14, 124, 134, 0.08);
    border-radius: 6px;
    font-size: 0.85rem;
}

.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.z02c4bpages a,
.pagebar .pagelist a {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--bj-border);
    border-radius: 6px;
    color: var(--bj-primary);
    font-size: 0.9rem;
}

.z02c4bpages a:hover,
.pagebar .pagelist a:hover {
    background: var(--bj-primary);
    color: #fff;
    border-color: var(--bj-primary);
}

/* —— Bootstrap 覆盖 —— */
.btn-primary {
    background: var(--bj-primary);
    border-color: var(--bj-primary);
}

.btn-primary:hover {
    background: var(--bj-primary-dark);
    border-color: var(--bj-primary-dark);
}

.bg-light {
    background: var(--bj-bg) !important;
}

/* —— 响应式 —— */
@media (max-width: 991px) {
    .z02c4bstats-section .row > [class*="col-"] {
        margin-bottom: 0.5rem;
    }

    .z02c4bfooter .row > [class*="col-"] {
        text-align: center;
        margin-bottom: 1.25rem;
    }

    .z02c4bfriend-links {
        justify-content: center;
    }
}

@media (max-width: 767px) {
    .z02c4bhero-section {
        text-align: center;
    }

    .z02c4bhero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .z02c4bhero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .z02c4bhero-buttons .btn {
        width: 100%;
    }

    .z02c4bhero-image-container {
        margin-top: 1.5rem;
    }

    .z02c4bdownload-card .d-flex.align-items-center {
        flex-wrap: nowrap;
        gap: 0.75rem;
    }

    .z02c4bdownload-card .d-flex.align-items-center .ms-3 {
        margin-left: 0.75rem !important;
        text-align: left;
        min-width: 0;
    }

    .z02c4bdownload-card .d-flex.align-items-center h3 {
        font-size: 1rem;
        word-break: break-word;
    }

    .z02c4bsecurity-section .row.g-4 > [class*="col-"] {
        margin-bottom: 0.5rem;
    }

    #faq .row > [class*="col-"] {
        margin-bottom: 0.75rem;
    }

    #article .row-cols-lg-5 {
        --bs-columns: 2;
    }

    #article .z02c4bthumb-home {
        height: 96px !important;
    }

    .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;
    }

    .z02c4bthumb-list,
    .z02c4bthumb-related {
        height: 72px !important;
    }

    .z02c4bthumb-side {
        height: 50px !important;
    }

    .z02c4bthumb-cover {
        max-width: 100%;
        width: 100%;
        max-height: 220px;
        object-fit: cover;
        border: 1px solid var(--bj-border);
        border-radius: var(--bj-radius);
    }

    .bj-knowledge-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575px) {
    .z02c4bnavbar-brand img {
        height: 36px;
    }

    #article .z02c4bthumb-home {
        height: 88px !important;
    }

    .z02c4bdownload-section .row.g-4 {
        --bs-gutter-x: 0.75rem;
    }

    .z02c4bdownload-card .card-body {
        padding: 1rem !important;
    }

    .z02c4bstat-number {
        font-size: 1.5rem;
    }

    #article .d-flex.justify-content-between {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.75rem;
    }
}