:root {
    --primary-color: #1a6b5c;
    --primary-dark: #0f3d35;
    --primary-light: #e8f5f2;
    --accent-color: #e85d4c;
    --accent-hover: #d14a3a;
    --text-color: #2c3330;
    --text-muted: #5c6b66;
    --surface: #ffffff;
    --surface-alt: #f4f7f6;
    --border-color: rgba(26, 107, 92, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(15, 61, 53, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 61, 53, 0.08);
    --transition: 0.25s ease;
}

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

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    line-height: 1.65;
    background: var(--surface);
    overflow-x: hidden;
}

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

/* 导航 */
.zb4469navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.zb4469navbar-brand img {
    height: 42px;
    width: auto;
}

.zb4469nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.zb4469nav-link:hover {
    color: var(--primary-color) !important;
    background: var(--primary-light);
}

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

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

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

    .zb4469nav-link {
        padding: 0.5rem 0.25rem !important;
    }
}

/* 通用区块 */
.zb4469section {
    padding: 4rem 0;
}

.zb4469section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.zb4469section-head--left {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
    max-width: none;
}

.zb4469section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.zb4469section-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

.zb4469section-head--light h2,
.zb4469section-head--light p {
    color: inherit;
}

/* 英雄区 */
.zb4469hero-section {
    background: linear-gradient(145deg, var(--primary-dark) 0%, var(--primary-color) 55%, #2a8f7a 100%);
    color: #fff;
    padding: clamp(3rem, 8vw, 5rem) 0;
    position: relative;
    overflow: hidden;
}

.zb4469hero-section::after {
    content: '';
    position: absolute;
    right: -10%;
    top: -20%;
    width: 50%;
    height: 140%;
    background: radial-gradient(circle, rgba(232, 93, 76, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.zb4469hero-content {
    position: relative;
    z-index: 1;
}

.zb4469hero-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, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    margin-bottom: 1rem;
}

.zb4469hero-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.zb4469hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.92;
    margin-bottom: 1.5rem;
    max-width: 36em;
}

.zb4469hero-subtitle strong {
    font-weight: 600;
    color: #fff;
}

.zb4469hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.zb4469btn {
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
}

.zb4469btn-accent {
    background: var(--accent-color);
    color: #fff;
}

.zb4469btn-accent:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(232, 93, 76, 0.35);
}

.zb4469btn-outline-light {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.65);
}

.zb4469btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border-color: #fff;
}

.zb4469btn-ghost {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.zb4469btn-ghost:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.zb4469btn-primary {
    background: var(--primary-color);
    color: #fff;
}

.zb4469btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
}

.zb4469btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.zb4469btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.zb4469hero-visual {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.zb4469hero-image {
    max-width: 280px;
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

/* 特点区 */
.zb4469features-section {
    background: var(--surface-alt);
}

.zb4469feature-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem 1.5rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
    border-left: 4px solid var(--accent-color);
}

.zb4469feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.zb4469feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.65rem;
}

.zb4469feature-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
}

.zb4469feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* 统计区 */
.zb4469stats-section {
    background: var(--primary-dark);
    color: #fff;
    padding: 3.5rem 0;
}

.zb4469stats-grid .zb4469stat-item {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.25rem 1rem;
    text-align: center;
    height: 100%;
}

.zb4469stat-number {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.2;
    margin-bottom: 0.35rem;
}

.zb4469stat-label {
    font-size: 0.9rem;
    opacity: 0.88;
}

/* 知识区 */
.zb4469knowledge-section {
    background: var(--surface);
}

.zb4469knowledge-text {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.98rem;
}

.zb4469knowledge-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zb4469knowledge-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 0.95rem;
}

.zb4469knowledge-list i {
    color: var(--primary-color);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.zb4469knowledge-panel {
    background: linear-gradient(135deg, var(--primary-light) 0%, #fff 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    height: 100%;
}

.zb4469knowledge-panel h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.zb4469knowledge-panel ol {
    padding-left: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.zb4469knowledge-panel li {
    margin-bottom: 0.4rem;
}

.zb4469knowledge-note {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-color);
}

/* 下载区 */
.zb4469download-section {
    padding: 4rem 0;
    background: var(--surface-alt);
}

.zb4469download-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), border-color var(--transition);
    overflow: hidden;
}

.zb4469download-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(26, 107, 92, 0.25);
}

.zb4469download-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 0.75rem 0 0.5rem;
    line-height: 1.35;
}

.zb4469download-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    flex-grow: 0;
}

.zb4469platform-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    color: #fff;
    flex-shrink: 0;
}

.zb4469ios-icon {
    background: linear-gradient(135deg, #555 0%, #222 100%);
}

.zb4469android-icon {
    background: linear-gradient(135deg, #3ddc84 0%, #2a9d5c 100%);
}

.zb4469pc-icon {
    background: linear-gradient(135deg, #0078d4 0%, #005a9e 100%);
}

.zb4469web-icon {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.zb4469download-info {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    flex-grow: 1;
}

.zb4469download-info li {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.zb4469download-info i {
    color: var(--primary-color);
    font-size: 0.75rem;
}

.zb4469download-card .zb4469btn {
    margin-top: auto;
}

/* 安全区 */
.zb4469security-section {
    padding: 4rem 0;
    background: var(--surface);
}

.zb4469security-card {
    background: var(--surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 1.25rem;
    height: 100%;
    text-align: center;
    transition: border-color var(--transition);
}

.zb4469security-card:hover {
    border-color: var(--primary-color);
}

.zb4469security-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.zb4469security-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.zb4469security-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
}

.zb4469certificate-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    height: 100%;
}

.zb4469cert-ico {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
    display: block;
}

.zb4469certificate-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.35rem;
}

.zb4469certificate-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

/* FAQ */
.zb4469faq-section {
    background: var(--surface-alt);
}

.zb4469faq-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
}

.zb4469faq-card h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.zb4469faq-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
}

/* 文章区 */
.zb4469article-section {
    background: var(--surface);
}

.zb4469article-card {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    overflow: hidden;
    box-shadow: var(--shadow-sm) !important;
}

.zb4469thumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

/* 页脚 */
.zb4469footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.zb4469footer-desc {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.6;
}

.zb4469footer-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.zb4469footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zb4469footer-links li {
    margin-bottom: 0.5rem;
}

.zb4469footer-link {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.zb4469footer-link:hover {
    color: var(--accent-color);
}

.zb4469friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.zb4469friend-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
    text-decoration: none;
}

.zb4469friend-links a:hover {
    color: #fff;
}

.zb4469footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 1.25rem;
    margin-top: 1.5rem;
    font-size: 0.88rem;
}

.zb4469footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.zb4469footer-bottom a:hover {
    color: var(--accent-color);
}

/* 列表/内页 */
.zb4469pages .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.zb4469article-content {
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.zb4469article-content img {
    max-width: 100%;
    height: auto;
}

.listbox .card,
article.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

/* 移动端 */
@media (max-width: 767px) {
    .zb4469section {
        padding: 2.75rem 0;
    }

    .zb4469section-head {
        margin-bottom: 1.75rem;
    }

    .zb4469hero-buttons {
        flex-direction: column;
    }

    .zb4469hero-buttons .zb4469btn {
        width: 100%;
    }

    .zb4469hero-image {
        max-width: 220px;
    }

    .zb4469feature-card {
        margin-bottom: 0;
    }

    .zb4469download-card {
        padding: 1.25rem;
    }

    .zb4469download-card h3 {
        font-size: 0.95rem;
    }

    .zb4469knowledge-panel {
        margin-top: 0.5rem;
    }

    .zb4469footer {
        text-align: center;
    }

    .zb4469footer-title {
        margin-top: 0.5rem;
    }

    .zb4469friend-links {
        justify-content: center;
    }

    #article .zb4469thumb-home {
        height: 96px !important;
    }

    #article .h6 {
        font-size: 0.9rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .zb4469thumb-list,
    .zb4469thumb-related {
        height: 72px !important;
    }

    .zb4469thumb-side {
        height: 50px !important;
    }

    .zb4469thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
    }

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

@media (max-width: 575px) {
    .zb4469navbar-brand img {
        height: 36px;
    }

    .zb4469stat-item {
        padding: 1rem 0.75rem;
    }

    #article .row-cols-sm-2 > * {
        flex: 0 0 100%;
        max-width: 100%;
    }
}