/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 容器 */
.z4ddb3container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.z4ddb3header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.z4ddb3header .z4ddb3container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.z4ddb3logo h1 {
    font-size: 24px;
    color: #1a1a1a;
}

/* 汉堡菜单按钮 */
.z4ddb3menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
    padding: 0;
    background: none;
    border: none;
}

.z4ddb3menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #333;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.z4ddb3main-nav {
    transition: all 0.3s ease;
}

.z4ddb3main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.z4ddb3main-nav li {
    margin-left: 30px;
}

.z4ddb3main-nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    padding: 5px 0;
    position: relative;
}

.z4ddb3main-nav a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #007bff;
    transition: width 0.3s ease;
}

.z4ddb3main-nav a:hover:after {
    width: 100%;
}

.z4ddb3main-nav a:hover {
    color: #007bff;
}

/* Hero部分 */
.z4ddb3hero {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #fff;
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}

.z4ddb3hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(0,123,255,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.z4ddb3hero .z4ddb3container {
    position: relative;
    z-index: 1;
}

.z4ddb3hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.z4ddb3hero-text {
    flex: 1;
    max-width: 600px;
}

.z4ddb3hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.z4ddb3hero-img {
    max-width: 100%;
    max-height: 340px;
    width: auto;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}

.z4ddb3hero-img:hover {
    transform: translateY(-5px);
}

.z4ddb3hero-content h2 {
    font-size: clamp(28px, 4vw, 42px);
    line-height: 1.3;
    margin-bottom: 16px;
}

.z4ddb3hero-content p {
    font-size: clamp(15px, 2vw, 18px);
    margin-bottom: 12px;
    line-height: 1.7;
}

.z4ddb3hero-intro {
    font-size: 14px;
    line-height: 1.75;
    opacity: 0.88;
    margin-bottom: 24px;
}

.z4ddb3section-desc {
    text-align: center;
    max-width: 720px;
    margin: -24px auto 36px;
    font-size: 15px;
    line-height: 1.75;
    color: #666;
}

.z4ddb3security .z4ddb3section-desc {
    margin: -24px auto 36px;
    color: rgba(255,255,255,0.75);
}

.z4ddb3hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.z4ddb3stat-item {
    text-align: center;
}

.z4ddb3stat-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.z4ddb3stat-text {
    font-size: 16px;
    opacity: 0.9;
}

/* 按钮样式 */
.z4ddb3btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    margin: 0 10px;
}

.z4ddb3btn-primary {
    background-color: #fff;
    color: #007bff;
}

.z4ddb3btn-secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 1px solid #fff;
}

.z4ddb3btn-primary:hover, .z4ddb3btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.z4ddb3download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.z4ddb3download-buttons .btn,
.z4ddb3download-buttons .z4ddb3btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s ease;
    text-align: center;
}

.z4ddb3download-buttons .btn-primary,
.z4ddb3download-buttons .z4ddb3btn-primary {
    background-color: #007bff;
    color: #fff;
    border: none;
}

.z4ddb3download-buttons .btn-secondary,
.z4ddb3download-buttons .z4ddb3btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.8);
}

.z4ddb3download-buttons .btn-primary:hover,
.z4ddb3download-buttons .z4ddb3btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.z4ddb3download-buttons .btn-secondary:hover,
.z4ddb3download-buttons .z4ddb3btn-secondary:hover {
    background-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

/* 板块标题 */
.z4ddb3section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
    color: #1a1a1a;
    word-break: break-word;
}

.z4ddb3section-title--left {
    text-align: left;
    margin-bottom: 12px;
}

.z4ddb3section-desc--left {
    text-align: left;
    margin: 0 0 36px;
    max-width: none;
}

.z4ddb3section-header {
    margin-bottom: 10px;
}

/* 首页板块统一间距 */
.z4ddb3features,
.z4ddb3products,
.z4ddb3guide,
.z4ddb3security,
.z4ddb3faq,
.z4ddb3articles {
    padding: 72px 0;
}

/* 特性区域 - 横向图标卡片 */
.z4ddb3features {
    background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
}

.z4ddb3feature-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    align-items: stretch;
}

.z4ddb3feature-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    height: 100%;
    background: #fff;
    padding: 28px;
    border-radius: 12px;
    border: 1px solid #e9ecef;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.z4ddb3feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,123,255,0.1);
}

.z4ddb3feature-icon {
    flex: 0 0 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
}

.z4ddb3feature-icon--blue { background: linear-gradient(135deg, #007bff, #0056b3); }
.z4ddb3feature-icon--green { background: linear-gradient(135deg, #28a745, #1e7e34); }
.z4ddb3feature-icon--purple { background: linear-gradient(135deg, #6f42c1, #563d7c); }
.z4ddb3feature-icon--orange { background: linear-gradient(135deg, #fd7e14, #e8590c); }

.z4ddb3feature-body {
    flex: 1;
    min-width: 0;
}

.z4ddb3feature-body h3 {
    color: #1a1a1a;
    margin-bottom: 10px;
    font-size: 20px;
}

.z4ddb3feature-body p {
    font-size: 14px;
    color: #666;
    margin-bottom: 0;
}

.z4ddb3feature-list {
    list-style: none;
    margin-top: 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.z4ddb3feature-list li {
    font-size: 13px;
    color: #555;
    padding-left: 14px;
    position: relative;
}

.z4ddb3feature-list li:before {
    content: "";
    width: 6px;
    height: 6px;
    background: #007bff;
    border-radius: 50%;
    position: absolute;
    left: 0;
    top: 8px;
}

/* 产品服务 - 不对称布局 */
.z4ddb3products {
    background: #fff;
}

.z4ddb3product-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
    align-items: stretch;
}

.z4ddb3product-stack {
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-height: 100%;
}

.z4ddb3product-stack .z4ddb3product-compact {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.z4ddb3product-item {
    background: #fff;
    padding: 32px;
    border-radius: 12px;
    border: 1px solid #e9ecef;
    transition: box-shadow 0.3s ease;
}

.z4ddb3product-item:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.z4ddb3product-featured {
    background: linear-gradient(160deg, #007bff 0%, #0056b3 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100%;
}

.z4ddb3product-featured h3,
.z4ddb3product-featured p {
    color: #fff;
}

.z4ddb3product-featured .z4ddb3product-features li {
    color: rgba(255,255,255,0.9);
}

.z4ddb3product-featured .z4ddb3product-features li:before {
    color: #fff;
}

.z4ddb3product-tag {
    display: inline-block;
    font-size: 12px;
    padding: 4px 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    margin-bottom: 16px;
    width: fit-content;
}

.z4ddb3product-compact {
    flex: 1;
    border-left: 4px solid #007bff;
}

.z4ddb3product-item h3 {
    color: #007bff;
    margin-bottom: 12px;
    font-size: 22px;
}

.z4ddb3product-featured h3 {
    color: #fff;
    font-size: 28px;
}

.z4ddb3product-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

.z4ddb3product-features {
    list-style: none;
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
}

.z4ddb3product-features li {
    font-size: 13px;
    padding-left: 18px;
    position: relative;
}

.z4ddb3product-features li:before {
    content: "✓";
    color: #28a745;
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* 下载指南 - 时间轴 */
.z4ddb3guide {
    background-color: #f8f9fa;
}

.z4ddb3timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    position: relative;
    align-items: stretch;
}

.z4ddb3timeline::before {
    content: "";
    position: absolute;
    top: 28px;
    left: 12%;
    right: 12%;
    height: 3px;
    background: linear-gradient(90deg, #007bff, #28a745);
    border-radius: 2px;
    z-index: 0;
}

.z4ddb3timeline-item {
    position: relative;
    z-index: 1;
    padding: 0 8px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.z4ddb3timeline-marker {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.z4ddb3timeline-marker span {
    width: 56px;
    height: 56px;
    background: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0,123,255,0.35);
    border: 4px solid #f8f9fa;
}

.z4ddb3timeline-item:nth-child(2) .z4ddb3timeline-marker span { background: #17a2b8; box-shadow: 0 4px 12px rgba(23,162,184,0.35); }
.z4ddb3timeline-item:nth-child(3) .z4ddb3timeline-marker span { background: #28a745; box-shadow: 0 4px 12px rgba(40,167,69,0.35); }
.z4ddb3timeline-item:nth-child(4) .z4ddb3timeline-marker span { background: #fd7e14; box-shadow: 0 4px 12px rgba(253,126,20,0.35); }

.z4ddb3timeline-content {
    background: #fff;
    padding: 20px 18px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.z4ddb3timeline-content h3 {
    color: #1a1a1a;
    margin-bottom: 10px;
    font-size: 17px;
}

.z4ddb3timeline-content > p {
    font-size: 14px;
    color: #666;
    margin-bottom: 0;
}

.z4ddb3step-details {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed #e9ecef;
}

.z4ddb3step-details p {
    margin-bottom: 8px;
    font-size: 13px;
    color: #888;
}

/* 安全保障 - 深色面板 */
.z4ddb3security {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
}

.z4ddb3security .z4ddb3section-title {
    color: #fff;
}

.z4ddb3security .z4ddb3section-desc {
    color: rgba(255,255,255,0.75);
}

.z4ddb3security-panels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.z4ddb3security-panel {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 16px;
    padding: 28px;
    transition: background 0.3s ease, transform 0.3s ease;
}

.z4ddb3security-panel:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-4px);
}

.z4ddb3security-panel-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.z4ddb3security-badge {
    width: 40px;
    height: 40px;
    background: #007bff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.z4ddb3security-panel:nth-child(2) .z4ddb3security-badge { background: #28a745; }
.z4ddb3security-panel:nth-child(3) .z4ddb3security-badge { background: #fd7e14; }

.z4ddb3security-panel-head h3 {
    color: #fff;
    margin: 0;
    font-size: 20px;
}

.z4ddb3security-list {
    list-style: none;
}

.z4ddb3security-list li {
    margin-bottom: 12px;
    padding-left: 22px;
    position: relative;
    font-size: 14px;
    color: rgba(255,255,255,0.85);
}

.z4ddb3security-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #4dabf7;
    font-weight: bold;
}

/* FAQ部分 */
.z4ddb3faq {
    background-color: #f8f9fa;
}

.z4ddb3faq-container {
    display: flex;
    gap: 32px;
    margin-top: 0;
}

/* 左侧导航 */
.z4ddb3faq-nav {
    flex: 0 0 250px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    padding: 20px;
}

.z4ddb3faq-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z4ddb3faq-nav-list li {
    padding: 12px 15px;
    margin-bottom: 8px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #333;
    font-weight: 500;
}

.z4ddb3faq-nav-list li:hover {
    background-color: #f8f9fa;
}

.z4ddb3faq-nav-list li.active {
    background-color: #007bff;
    color: #fff;
}

/* 右侧内容区 */
.z4ddb3faq-content {
    flex: 1;
}

.z4ddb3faq-category {
    display: none;
}

.z4ddb3faq-category.active {
    display: block;
}

.z4ddb3faq-item {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.z4ddb3faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.z4ddb3faq-question:hover {
    background-color: #f8f9fa;
}

.z4ddb3faq-question h3 {
    margin: 0;
    font-size: 18px;
    color: #333;
}

.z4ddb3toggle-icon {
    font-size: 24px;
    color: #007bff;
    transition: transform 0.3s ease;
}

.z4ddb3faq-item.active .z4ddb3toggle-icon {
    transform: rotate(45deg);
}

.z4ddb3faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.z4ddb3faq-item.active .z4ddb3faq-answer {
    padding: 0 20px 20px;
    max-height: 1000px;
}

/* FAQ内容网格布局 */
.z4ddb3download-channels,
.z4ddb3system-requirements,
.z4ddb3register-steps,
.z4ddb3verification-requirements,
.z4ddb3payment-methods,
.z4ddb3fee-structure,
.z4ddb3security-measures,
.z4ddb3fund-security {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.z4ddb3channel-item,
.z4ddb3system-item,
.z4ddb3step-item,
.z4ddb3requirement-item,
.z4ddb3payment-item,
.z4ddb3fee-item,
.z4ddb3security-item,
.z4ddb3security-feature {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.z4ddb3channel-item i,
.z4ddb3system-item i,
.z4ddb3step-item i,
.z4ddb3requirement-item i,
.z4ddb3payment-item i,
.z4ddb3fee-item i,
.z4ddb3security-item i,
.z4ddb3security-feature i {
    margin-bottom: 10px;
}

.z4ddb3channel-item h4,
.z4ddb3system-item h4,
.z4ddb3step-item h4,
.z4ddb3requirement-item h4,
.z4ddb3payment-item h4,
.z4ddb3fee-item h4,
.z4ddb3security-item h4,
.z4ddb3security-feature h4 {
    margin: 10px 0;
    color: #333;
}

.z4ddb3step-number {
    width: 30px;
    height: 30px;
    background: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-weight: bold;
}

.z4ddb3fee-rate {
    font-size: 24px;
    color: #007bff;
    font-weight: bold;
    margin: 10px 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .z4ddb3faq-container {
        flex-direction: column;
    }

    .z4ddb3faq-nav {
        flex: none;
        width: 100%;
        margin-bottom: 20px;
    }

    .z4ddb3faq-nav-list {
        display: flex;
        overflow-x: auto;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }

    .z4ddb3faq-nav-list li {
        flex: 0 0 auto;
        margin-right: 10px;
        margin-bottom: 0;
        white-space: nowrap;
    }

    .z4ddb3download-channels,
    .z4ddb3system-requirements,
    .z4ddb3register-steps,
    .z4ddb3verification-requirements,
    .z4ddb3payment-methods,
    .z4ddb3fee-structure,
    .z4ddb3security-measures,
    .z4ddb3fund-security {
        grid-template-columns: 1fr;
    }
}

/* 页脚 */
.z4ddb3footer {
    background-color: #1a1a1a;
    color: white;
    padding: 60px 0 20px;
}

.z4ddb3footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.z4ddb3footer-section h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 18px;
}

.z4ddb3footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
}

.z4ddb3social-links {
    display: flex;
    gap: 20px;
}

.z4ddb3social-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.z4ddb3social-link:hover {
    color: #fff;
}

.z4ddb3footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.z4ddb3footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .z4ddb3header .z4ddb3container {
        height: 60px;
        padding: 0 15px;
    }

    .z4ddb3menu-toggle {
        display: flex;
    }

    .z4ddb3main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: #fff;
        padding: 80px 20px 20px;
        box-shadow: -2px 0 5px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 999;
    }

    .z4ddb3main-nav.active {
        right: 0;
    }

    .z4ddb3main-nav ul {
        flex-direction: column;
        align-items: flex-start;
    }

    .z4ddb3main-nav li {
        margin: 0;
        width: 100%;
        border-bottom: 1px solid #eee;
    }

    .z4ddb3main-nav a {
        display: block;
        padding: 15px 0;
        font-size: 16px;
    }

    .z4ddb3main-nav a:after {
        display: none;
    }

    /* 汉堡菜单动画 */
    .z4ddb3menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .z4ddb3menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .z4ddb3menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    /* 遮罩层 */
    .z4ddb3nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .z4ddb3nav-overlay.active {
        display: block;
        opacity: 1;
    }

    .z4ddb3hero-content h2 {
        font-size: 36px;
    }

    .z4ddb3hero-content p {
        font-size: 18px;
    }

    .z4ddb3hero-stats {
        flex-direction: column;
        gap: 30px;
    }

    .z4ddb3download-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .z4ddb3btn {
        margin: 8px 0;
        width: 100%;
        max-width: 300px;
    }

    .z4ddb3section-title {
        font-size: 28px;
        margin-bottom: 30px;
    }

    .z4ddb3feature-grid,
    .z4ddb3product-grid,
    .z4ddb3guide-steps,
    .z4ddb3security-grid {
        grid-template-columns: 1fr;
    }

    .z4ddb3faq-container {
        flex-direction: column;
    }

    .z4ddb3faq-nav {
        flex: none;
        width: 100%;
        margin-bottom: 20px;
    }

    .z4ddb3faq-nav-list {
        display: flex;
        overflow-x: auto;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }

    .z4ddb3faq-nav-list li {
        flex: 0 0 auto;
        margin-right: 10px;
        margin-bottom: 0;
        white-space: nowrap;
    }

    .z4ddb3faq-question h3 {
        font-size: 16px;
    }

    .z4ddb3download-channels,
    .z4ddb3system-requirements,
    .z4ddb3register-steps,
    .z4ddb3verification-requirements,
    .z4ddb3payment-methods,
    .z4ddb3fee-structure,
    .z4ddb3security-measures,
    .z4ddb3fund-security {
        grid-template-columns: 1fr;
    }

    .z4ddb3footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .z4ddb3social-links {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .z4ddb3hero-content h2 {
        font-size: 24px;
    }

    .z4ddb3hero-content p {
        font-size: 14px;
    }

    .z4ddb3stat-number {
        font-size: 24px;
    }

    .z4ddb3stat-text {
        font-size: 14px;
    }

    .z4ddb3section-title {
        font-size: 24px;
    }

    .z4ddb3feature-item h3,
    .z4ddb3product-item h3,
    .z4ddb3step h3,
    .z4ddb3security-item h3 {
        font-size: 18px;
    }

    .z4ddb3faq-question {
        padding: 15px;
    }

    .z4ddb3faq-answer {
        padding: 0 15px 15px;
    }

    .z4ddb3channel-item,
    .z4ddb3system-item,
    .z4ddb3step-item,
    .z4ddb3requirement-item,
    .z4ddb3payment-item,
    .z4ddb3fee-item,
    .z4ddb3security-item,
    .z4ddb3security-feature {
        padding: 15px;
    }

    .z4ddb3step-number {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }

    .z4ddb3fee-rate {
        font-size: 20px;
    }

    [class^="z4ddb3icon-"] {
        width: 20px;
        height: 20px;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .z4ddb3faq-nav-list li:hover {
        background: none;
    }

    .z4ddb3btn:hover {
        transform: none;
    }

    .z4ddb3main-nav a:hover {
        color: #333;
    }
}

/* 打印样式优化 */
@media print {
    .z4ddb3header,
    .z4ddb3hero,
    .z4ddb3download-buttons,
    .z4ddb3footer {
        display: none;
    }

    body {
        color: #000;
    }

    .z4ddb3container {
        max-width: 100%;
        padding: 0;
    }

    .z4ddb3section-title {
        color: #000;
    }

    .z4ddb3feature-item,
    .z4ddb3product-item,
    .z4ddb3step,
    .z4ddb3security-item,
    .z4ddb3faq-item {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #fff;
    }

    .z4ddb3header {
        background-color: #2d2d2d;
        box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    .z4ddb3logo h1 {
        color: #fff;
    }

    .z4ddb3main-nav a {
        color: #fff;
    }

    .z4ddb3main-nav a:hover {
        color: #007bff;
    }

    .z4ddb3feature-item,
    .z4ddb3product-item,
    .z4ddb3step,
    .z4ddb3security-item,
    .z4ddb3faq-item {
        background-color: #2d2d2d;
        box-shadow: 0 2px 15px rgba(0,0,0,0.2);
    }

    .z4ddb3faq-nav {
        background-color: #2d2d2d;
    }

    .z4ddb3faq-nav-list li:hover {
        background-color: #3d3d3d;
    }

    .z4ddb3channel-item,
    .z4ddb3system-item,
    .z4ddb3step-item,
    .z4ddb3requirement-item,
    .z4ddb3payment-item,
    .z4ddb3fee-item,
    .z4ddb3security-item,
    .z4ddb3security-feature {
        background-color: #2d2d2d;
    }

    .z4ddb3menu-toggle span {
        background-color: #fff;
    }

    .z4ddb3main-nav {
        background-color: #2d2d2d;
    }

    .z4ddb3main-nav li {
        border-bottom-color: #3d3d3d;
    }
}

@media (max-width: 1200px) {
    .z4ddb3main-nav li {
        margin-left: 14px;
    }

    .z4ddb3main-nav a {
        font-size: 14px;
    }

    .z4ddb3logo h1 {
        font-size: 20px;
    }
}

@media (max-width: 992px) {
    .z4ddb3hero-content {
        flex-direction: column;
        text-align: center;
    }

    .z4ddb3hero-text {
        max-width: 100%;
    }

    .z4ddb3hero-image {
        margin-top: 32px;
        width: 100%;
    }

    .z4ddb3hero-img {
        max-width: 420px;
        max-height: 280px;
    }

    .z4ddb3section-title {
        font-size: 30px;
        margin-bottom: 36px;
    }

    .z4ddb3feature-card,
    .z4ddb3product-item,
    .z4ddb3timeline-content,
    .z4ddb3security-panel {
        padding: 22px;
    }
}

/* Icons */
[class^="z4ddb3icon-"] {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.z4ddb3icon-website { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z"/></svg>'); }
.z4ddb3icon-store { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M20 4H4v2h16V4zm1 10v-2l-1-5H4l-1 5v2h1v6h10v-6h4v6h2v-6h1zm-9 4H6v-4h6v4z"/></svg>'); }
.z4ddb3icon-github { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 2C6.477 2 2 6.477 2 12c0 4.42 2.865 8.17 6.839 9.49.5.092.682-.217.682-.482 0-.237-.008-.866-.013-1.7-2.782.604-3.369-1.34-3.369-1.34-.454-1.156-1.11-1.464-1.11-1.464-.908-.62.069-.608.069-.608 1.003.07 1.531 1.03 1.531 1.03.892 1.529 2.341 1.087 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.11-4.555-4.943 0-1.091.39-1.984 1.029-2.683-.103-.253-.446-1.27.098-2.647 0 0 .84-.269 2.75 1.025A9.578 9.578 0 0112 6.836c.85.004 1.705.114 2.504.336 1.909-1.294 2.747-1.025 2.747-1.025.546 1.377.203 2.394.1 2.647.64.699 1.028 1.592 1.028 2.683 0 3.842-2.339 4.687-4.566 4.935.359.309.678.919.678 1.852 0 1.336-.012 2.415-.012 2.743 0 .267.18.578.688.48C19.138 20.167 22 16.418 22 12c0-5.523-4.477-10-10-10z"/></svg>'); }
.z4ddb3icon-id { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M20 4H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 14H4V6h16v12zM6 10h12v2H6zm0-4h12v2H6z"/></svg>'); }
.z4ddb3icon-face { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-5-6h10v2H7z"/></svg>'); }
.z4ddb3icon-photo { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z"/></svg>'); }
.z4ddb3icon-bank { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M11.5 1L2 6v2h19V6m-5 4v2h2V9m-4 0v2h2V9m-4 0v2h2V9m-4 0v2h2V9m-4 0v2h2V9M2 22h19v-2H2m0-4h19v-2H2m0-4h19v-2H2m0-4h19V8H2v2z"/></svg>'); }
.z4ddb3icon-mobile { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M17 1.01L7 1c-1.1 0-2 .9-2 2v18c0 1.1.9 2 2 2h10c1.1 0 2-.9 2-2V3c0-1.1-.9-1.99-2-1.99zM17 19H7V5h10v14z"/></svg>'); }
.z4ddb3icon-crypto { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1.41 16.09V20h-2.67v-1.93c-1.71-.36-3.16-1.46-3.27-3.4h1.96c.1 1.05.82 1.87 2.65 1.87 1.96 0 2.4-.98 2.4-1.59 0-.83-.44-1.61-2.67-2.14-2.48-.6-4.18-1.62-4.18-3.67 0-1.72 1.39-2.84 3.11-3.21V4h2.67v1.95c1.86.45 2.79 1.86 2.85 3.39H14.3c-.05-1.11-.64-1.87-2.22-1.87-1.5 0-2.4.68-2.4 1.64 0 .84.65 1.39 2.67 1.91s4.18 1.39 4.18 3.91c-.01 1.83-1.38 2.83-3.12 3.16z"/></svg>'); }
.z4ddb3icon-card { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M20 4H4c-1.11 0-1.99.89-1.99 2L2 18c0 1.11.89 2 2 2h16c1.11 0 2-.89 2-2V6c0-1.11-.89-2-2-2zm0 14H4v-6h16v6zm0-10H4V6h16v2z"/></svg>'); }
.z4ddb3icon-2fa { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4zm0 10.99h7c-.53 4.12-3.28 7.79-7 8.94V12H5V6.3l7-3.11v8.8z"/></svg>'); }
.z4ddb3icon-password { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zm-6 9c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2zm3.1-9H8.9V6c0-1.71 1.39-3.1 3.1-3.1 1.71 0 3.1 1.39 3.1 3.1v2z"/></svg>'); }
.z4ddb3icon-email { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z"/></svg>'); }
.z4ddb3icon-whitelist { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z"/></svg>'); }
.z4ddb3icon-wallet { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M21 7.28V5c0-1.1-.9-2-2-2H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.1 0 2-.9 2-2v-2.28c.59-.35 1-.98 1-1.72V9c0-.74-.41-1.37-1-1.72zM20 9v6h-7V9h7zM5 19V5h14v2H12c-1.1 0-2 .9-2 2v6c0 1.1.9 2 2 2h7v2H5z"/></svg>'); }
.z4ddb3icon-signature { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M22 3H2C.9 3 0 3.9 0 5v14c0 1.1.9 2 2 2h20c1.1 0 1.99-.9 1.99-2L24 5c0-1.1-.9-2-2-2zm0 16H2V5h20v14zM12 6c-3.31 0-6 2.69-6 6s2.69 6 6 6 6-2.69 6-6-2.69-6-6-6zm0 10c-2.21 0-4-1.79-4-4s1.79-4 4-4 4 1.79 4 4-1.79 4-4 4z"/></svg>'); }
.z4ddb3icon-monitor { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M20 3H4c-1.1 0-2 .9-2 2v11c0 1.1.9 2 2 2h3l-1 1v2h12v-2l-1-1h3c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 13H4V5h16v11z"/></svg>'); }
.z4ddb3icon-shield { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23007bff"><path d="M12 1L3 5v6c0 5.55 3.84 10.74 9 12 5.16-1.26 9-6.45 9-12V5l-9-4zm0 10.99h7c-.53 4.12-3.28 7.79-7 8.94V12H5V6.3l7-3.11v8.8z"/></svg>'); }

/* 触摸设备优化 */
@media (hover: none) {
    .z4ddb3faq-nav-list li:hover {
        background: none;
    }

    .z4ddb3btn:hover {
        transform: none;
    }

    .z4ddb3main-nav a:hover {
        color: #333;
    }
}

/* 打印样式优化 */
@media print {
    .z4ddb3header,
    .z4ddb3hero,
    .z4ddb3download-buttons,
    .z4ddb3footer {
        display: none;
    }

    body {
        color: #000;
    }

    .z4ddb3container {
        max-width: 100%;
        padding: 0;
    }

    .z4ddb3section-title {
        color: #000;
    }

    .z4ddb3feature-item,
    .z4ddb3product-item,
    .z4ddb3step,
    .z4ddb3security-item,
    .z4ddb3faq-item {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .z4ddb3menu-toggle span {
        background-color: #fff;
    }

    .z4ddb3main-nav {
        background-color: #2d2d2d;
    }

    .z4ddb3main-nav li {
        border-bottom-color: #3d3d3d;
    }

    .z4ddb3main-nav a {
        color: #fff;
    }
}

/* 导航当前项 */
.z4ddb3main-nav li.z4ddb3this a,
.z4ddb3main-nav li.z4ddb3this a:hover {
    color: #007bff;
}

.z4ddb3main-nav li.z4ddb3this a:after {
    width: 100%;
}

/* 首页文章板块 - 瀑布流布局 */
.z4ddb3articles {
    background: linear-gradient(180deg, #fff 0%, #f8f9fa 100%);
}

.z4ddb3article-masonry {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.z4ddb3article-masonry .z4ddb3article-card:nth-child(1),
.z4ddb3article-masonry .z4ddb3article-card:nth-child(2) {
    grid-column: span 2;
}

.z4ddb3article-masonry .z4ddb3article-card:nth-child(1) .z4ddb3article-thumb,
.z4ddb3article-masonry .z4ddb3article-card:nth-child(2) .z4ddb3article-thumb {
    aspect-ratio: 2 / 1;
}

.z4ddb3article-masonry .z4ddb3article-card:nth-child(n+3) {
    grid-column: span 1;
}

.z4ddb3article-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.z4ddb3article-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.z4ddb3article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.z4ddb3article-thumb {
    display: block;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: #f0f0f0;
}

.z4ddb3article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.z4ddb3article-card:hover .z4ddb3article-thumb img {
    transform: scale(1.05);
}

.z4ddb3article-card-body {
    padding: 16px;
}

.z4ddb3article-card h3 {
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.z4ddb3article-card h3 a {
    color: #1a1a1a;
    text-decoration: none;
    transition: color 0.3s;
}

.z4ddb3article-card h3 a:hover {
    color: #007bff;
}

.z4ddb3article-meta {
    font-size: 13px;
    color: #999;
    margin: 0;
}

/* 列表页 & 内容页通用布局 */
.z4ddb3page-main {
    padding: 100px 0 60px;
    min-height: calc(100vh - 200px);
    background-color: #f8f9fa;
}

.z4ddb3breadcrumb {
    padding: 12px 0 20px;
    font-size: 14px;
    color: #666;
}

.z4ddb3breadcrumb a {
    color: #007bff;
    text-decoration: none;
}

.z4ddb3breadcrumb a:hover {
    text-decoration: underline;
}

.z4ddb3breadcrumb-sep {
    margin: 0 8px;
    color: #ccc;
}

.z4ddb3page-layout {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.z4ddb3page-content {
    flex: 1;
    min-width: 0;
}

.z4ddb3page-title {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.z4ddb3page-desc {
    color: #666;
    margin-bottom: 24px;
    font-size: 15px;
}

/* 列表页 */
.z4ddb3listbox {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    overflow: hidden;
}

.z4ddb3list-items {
    list-style: none;
    margin: 0;
    padding: 0;
}

.z4ddb3list-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    border-bottom: 1px solid #eee;
    transition: background-color 0.3s;
}

.z4ddb3list-item:last-child {
    border-bottom: none;
}

.z4ddb3list-item:hover {
    background-color: #f8f9fa;
}

.z4ddb3list-thumb {
    flex: 0 0 200px;
    overflow: hidden;
    border-radius: 8px;
    aspect-ratio: 16 / 10;
    background: #f0f0f0;
}

.z4ddb3list-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.z4ddb3list-item:hover .z4ddb3list-thumb img {
    transform: scale(1.05);
}

.z4ddb3list-info {
    flex: 1;
    min-width: 0;
}

.z4ddb3list-title {
    font-size: 18px;
    color: #1a1a1a;
    text-decoration: none;
    transition: color 0.3s;
}

.z4ddb3list-title:hover {
    color: #007bff;
}

.z4ddb3list-meta {
    margin: 10px 0;
    font-size: 13px;
    color: #999;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.z4ddb3list-meta a {
    color: #007bff;
    text-decoration: none;
}

.z4ddb3list-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

/* 分页 - 左右布局 */
.z4ddb3pagebar {
    margin-top: 30px;
}

.z4ddb3pages {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.z4ddb3pagelist {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
    gap: 8px;
}

.z4ddb3pagelist-left {
    justify-content: flex-start;
    flex: 1;
}

.z4ddb3pagelist-center {
    justify-content: center;
    flex: 0 1 auto;
}

.z4ddb3pagelist-right {
    justify-content: flex-end;
    flex: 1;
}

.z4ddb3pagelist li {
    display: inline-block;
}

.z4ddb3pagelist a,
.z4ddb3pagelist span {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    transition: all 0.3s;
    border: 1px solid #ddd;
}

.z4ddb3pagelist a:hover {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

.z4ddb3pagelist .thisclass,
.z4ddb3pagelist .thisclass a {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

/* 侧栏 */
.z4ddb3sidebar {
    flex: 0 0 280px;
    min-width: 0;
}

.z4ddb3sidebar-block {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    margin-bottom: 24px;
    overflow: hidden;
}

.z4ddb3sidebar-title {
    font-size: 16px;
    padding: 16px 20px;
    margin: 0;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: #fff;
}

.z4ddb3sidebar-title a {
    color: #fff;
    text-decoration: none;
}

.z4ddb3sidebar-list {
    list-style: none;
    margin: 0;
    padding: 8px 0;
    max-height: 520px;
    overflow-y: auto;
}

.z4ddb3sidebar-list li {
    border-bottom: 1px solid #f0f0f0;
}

.z4ddb3sidebar-list li:last-child {
    border-bottom: none;
}

.z4ddb3sidebar-list a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.z4ddb3sidebar-list a:hover {
    background-color: #f8f9fa;
    color: #007bff;
    padding-left: 24px;
}

.z4ddb3sidebar-thumb-list {
    list-style: none;
    margin: 0;
    padding: 8px 0;
    max-height: 680px;
    overflow-y: auto;
}

.z4ddb3sidebar-thumb-item {
    border-bottom: 1px solid #f0f0f0;
}

.z4ddb3sidebar-thumb-item:last-child {
    border-bottom: none;
}

.z4ddb3sidebar-thumb-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.z4ddb3sidebar-thumb-link:hover {
    background-color: #f8f9fa;
}

.z4ddb3sidebar-thumb-img {
    flex: 0 0 80px;
    overflow: hidden;
    border-radius: 6px;
    aspect-ratio: 3 / 2;
    background: #f0f0f0;
}

.z4ddb3sidebar-thumb-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.z4ddb3sidebar-thumb-title {
    flex: 1;
    min-width: 0;
    font-size: 13px;
    line-height: 1.5;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.z4ddb3sidebar-thumb-link:hover .z4ddb3sidebar-thumb-title {
    color: #007bff;
}

/* 内容页 */
.z4ddb3article-header {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 30px;
    margin-bottom: 24px;
}

.z4ddb3article-title {
    font-size: 28px;
    color: #1a1a1a;
    line-height: 1.4;
    margin-bottom: 16px;
}

.z4ddb3article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: #999;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.z4ddb3article-meta a {
    color: #007bff;
    text-decoration: none;
}

.z4ddb3article-body {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 30px;
    margin-bottom: 24px;
    font-size: 16px;
    line-height: 1.8;
    color: #333;
}

.z4ddb3article-body > img,
.z4ddb3article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 0 0 20px;
    display: block;
}

.z4ddb3article-body p {
    margin-bottom: 16px;
}

.z4ddb3diyfield {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 20px 30px;
    margin-bottom: 24px;
}

.z4ddb3article-images {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 20px 30px;
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.z4ddb3article-figure {
    margin: 16px 0;
    text-align: center;
}

.z4ddb3article-figure img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.z4ddb3article-figure figcaption {
    font-size: 13px;
    color: #999;
    margin-top: 8px;
}

.z4ddb3article-figure-thumb {
    display: inline-block;
    width: calc(33.333% - 12px);
    margin: 6px;
    vertical-align: top;
}

.z4ddb3article-figure-thumb img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    border-radius: 6px;
}

.z4ddb3meta-tags {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 20px 30px;
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.z4ddb3tags-label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.z4ddb3meta-tags-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.z4ddb3tagitem a {
    display: inline-block;
    padding: 4px 12px;
    background: #f0f7ff;
    color: #007bff;
    border-radius: 20px;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.3s;
}

.z4ddb3tagitem a:hover {
    background: #007bff;
    color: #fff;
}

.z4ddb3article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
}

.z4ddb3article-prev,
.z4ddb3article-next {
    flex: 1;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 16px 20px;
}

.z4ddb3article-next {
    text-align: right;
}

.z4ddb3nav-label {
    display: block;
    font-size: 13px;
    color: #999;
    margin-bottom: 6px;
}

.z4ddb3article-prev a,
.z4ddb3article-next a {
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.z4ddb3article-prev a:hover,
.z4ddb3article-next a:hover {
    color: #007bff;
}

.z4ddb3related {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    padding: 24px 30px;
}

.z4ddb3related-title {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #007bff;
}

.z4ddb3related-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.z4ddb3related-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid #eee;
}

.z4ddb3related-item:last-child {
    border-bottom: none;
}

.z4ddb3related-thumb {
    flex: 0 0 120px;
    overflow: hidden;
    border-radius: 6px;
    aspect-ratio: 16 / 10;
    background: #f0f0f0;
}

.z4ddb3related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z4ddb3related-info {
    flex: 1;
    min-width: 0;
}

.z4ddb3related-info a {
    font-size: 15px;
    color: #1a1a1a;
    text-decoration: none;
    transition: color 0.3s;
}

.z4ddb3related-info a:hover {
    color: #007bff;
}

.z4ddb3related-info p {
    font-size: 13px;
    color: #999;
    margin-top: 6px;
    line-height: 1.6;
}

/* 首页板块响应式 */
@media (max-width: 1200px) {
    .z4ddb3timeline {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 20px;
    }

    .z4ddb3timeline::before {
        display: none;
    }

    .z4ddb3article-masonry {
        grid-template-columns: repeat(3, 1fr);
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(1) {
        grid-column: span 3;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(2) {
        grid-column: span 3;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(n+3) {
        grid-column: span 1;
    }
}

@media (max-width: 992px) {
    .z4ddb3feature-layout {
        grid-template-columns: 1fr;
    }

    .z4ddb3product-layout {
        grid-template-columns: 1fr;
    }

    .z4ddb3security-panels {
        grid-template-columns: 1fr;
    }

    .z4ddb3timeline {
        grid-template-columns: 1fr;
        gap: 0;
        padding-left: 20px;
    }

    .z4ddb3timeline::before {
        display: block;
        top: 0;
        bottom: 0;
        left: 27px;
        right: auto;
        width: 3px;
        height: auto;
        background: linear-gradient(180deg, #007bff, #fd7e14);
    }

    .z4ddb3timeline-item {
        display: flex;
        gap: 20px;
        padding: 0 0 32px;
    }

    .z4ddb3timeline-marker {
        flex: 0 0 56px;
        margin-bottom: 0;
    }

    .z4ddb3timeline-marker span {
        width: 48px;
        height: 48px;
        font-size: 18px;
        border-color: #f8f9fa;
    }

    .z4ddb3timeline-content {
        flex: 1;
        height: auto;
    }

    .z4ddb3section-title {
        font-size: 28px;
        margin-bottom: 36px;
    }

    .z4ddb3hero-content h2 {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .z4ddb3hero {
        padding: 96px 0 48px;
    }

    .z4ddb3hero-content {
        flex-direction: column;
        text-align: center;
    }

    .z4ddb3hero-text {
        max-width: 100%;
    }

    .z4ddb3hero-content p {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .z4ddb3hero-intro {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .z4ddb3download-buttons {
        justify-content: center;
    }

    .z4ddb3download-buttons .btn,
    .z4ddb3download-buttons .z4ddb3btn {
        width: 100%;
        max-width: 280px;
    }

    .z4ddb3feature-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .z4ddb3feature-list {
        justify-content: center;
    }

    .z4ddb3product-featured h3 {
        font-size: 22px;
    }

    .z4ddb3section-title--left,
    .z4ddb3section-desc--left {
        text-align: center;
    }

    .z4ddb3article-masonry {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(1),
    .z4ddb3article-masonry .z4ddb3article-card:nth-child(2) {
        grid-column: span 2;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(n+3) {
        grid-column: span 1;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(1) .z4ddb3article-thumb,
    .z4ddb3article-masonry .z4ddb3article-card:nth-child(2) .z4ddb3article-thumb {
        aspect-ratio: 16 / 10;
    }

    .z4ddb3hero-image {
        order: -1;
        margin-top: 0;
        margin-bottom: 24px;
    }

    .z4ddb3hero-img {
        max-width: 100%;
        max-height: 240px;
    }
}

@media (max-width: 576px) {
    .z4ddb3features,
    .z4ddb3products,
    .z4ddb3guide,
    .z4ddb3security,
    .z4ddb3articles,
    .z4ddb3faq {
        padding: 48px 0;
    }

    .z4ddb3product-featured {
        min-height: auto;
    }

    .z4ddb3section-title {
        font-size: 24px;
        margin-bottom: 28px;
    }

    .z4ddb3feature-card,
    .z4ddb3product-item,
    .z4ddb3timeline-content,
    .z4ddb3security-panel {
        padding: 18px;
    }

    .z4ddb3feature-card {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
    }

    .z4ddb3feature-list {
        justify-content: flex-start;
    }

    .z4ddb3timeline {
        padding-left: 12px;
    }

    .z4ddb3timeline::before {
        left: 19px;
    }

    .z4ddb3timeline-marker span {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .z4ddb3article-masonry {
        grid-template-columns: 1fr;
    }

    .z4ddb3article-masonry .z4ddb3article-card:nth-child(1),
    .z4ddb3article-masonry .z4ddb3article-card:nth-child(2),
    .z4ddb3article-masonry .z4ddb3article-card:nth-child(n+3) {
        grid-column: span 1;
    }
}

/* 文章板块 & 列表页 响应式 */
@media (max-width: 1200px) {
    .z4ddb3article-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .z4ddb3article-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .z4ddb3page-layout {
        flex-direction: column;
    }

    .z4ddb3sidebar {
        flex: none;
        width: 100%;
    }

    .z4ddb3sidebar-block {
        margin-bottom: 16px;
    }

    .z4ddb3sidebar-list {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .z4ddb3page-main {
        padding: 80px 0 40px;
    }

    .z4ddb3article-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .z4ddb3list-item {
        flex-direction: column;
        padding: 16px;
    }

    .z4ddb3list-thumb {
        flex: none;
        width: 100%;
    }

    .z4ddb3list-title {
        font-size: 16px;
    }

    .z4ddb3article-title {
        font-size: 22px;
    }

    .z4ddb3article-header,
    .z4ddb3article-body {
        padding: 20px;
    }

    .z4ddb3article-nav {
        flex-direction: column;
    }

    .z4ddb3article-next {
        text-align: left;
    }

    .z4ddb3related-item {
        flex-direction: column;
    }

    .z4ddb3related-thumb {
        flex: none;
        width: 100%;
    }

    .z4ddb3pages {
        flex-direction: column;
        gap: 16px;
    }

    .z4ddb3pagelist-left,
    .z4ddb3pagelist-center,
    .z4ddb3pagelist-right {
        justify-content: center;
        flex: none;
        width: 100%;
    }
}

@media (max-width: 576px) {
    .z4ddb3article-grid {
        grid-template-columns: 1fr;
    }

    .z4ddb3breadcrumb {
        font-size: 12px;
    }

    .z4ddb3page-title {
        font-size: 22px;
    }

    .z4ddb3article-meta {
        flex-direction: column;
        gap: 8px;
    }

    .z4ddb3article-figure-thumb {
        width: calc(50% - 12px);
    }
}

@media (max-width: 480px) {
    .z4ddb3article-figure-thumb {
        width: 100%;
        margin: 6px 0;
    }
}