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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.za02b4container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* 响应式容器 */
@media (max-width: 768px) {
    .za02b4container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .za02b4container {
        padding: 0 12px;
    }
}

/* 头部导航样式 */
.za02b4header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.za02b4navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.za02b4logo-text {
    color: #fff;
    font-size: 1.8rem;
    font-weight: bold;
}

.za02b4nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.za02b4nav-link {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.za02b4nav-link:hover {
    opacity: 0.8;
}

.za02b4mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.za02b4menu-icon {
    width: 25px;
    height: 3px;
    background-color: #fff;
    border-radius: 3px;
    transition: all 0.3s;
}

/* 主横幅区域 */
.za02b4hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.za02b4hero-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.za02b4hero-content {
    text-align: left;
    z-index: 2;
}

.za02b4hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: bold;
    line-height: 1.2;
}

.za02b4hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.za02b4hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.za02b4hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.za02b4hero-img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 按钮样式 */
.za02b4btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.za02b4btn-primary {
    background-color: #fff;
    color: #667eea;
}

.za02b4btn-primary:hover {
    background-color: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.za02b4btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.za02b4btn-secondary:hover {
    background-color: #fff;
    color: #667eea;
}

.za02b4btn-download {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    margin-top: 1rem;
}

.za02b4btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* 区域标题样式 */
.za02b4section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.za02b4section-title {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 1rem;
    font-weight: bold;
}

.za02b4section-description {
    font-size: 1.1rem;
    color: #666;
}

/* oe下载区域 */
.za02b4download-section {
    padding: 80px 0;
    background-color: #fff;
}

.za02b4download-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.za02b4download-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 2.5rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.za02b4download-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.za02b4download-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.za02b4download-title {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 1rem;
    font-weight: bold;
}

.za02b4download-text {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.za02b4download-info {
    margin: 1rem 0;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 5px;
}

.za02b4download-detail {
    font-size: 0.9rem;
    color: #555;
    margin: 0.3rem 0;
}

.za02b4download-steps {
    margin-top: 4rem;
    padding: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    color: #fff;
}

.za02b4steps-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: bold;
}

.za02b4steps-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.za02b4step-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.za02b4step-number {
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.za02b4step-text {
    flex: 1;
}

.za02b4step-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.za02b4step-desc {
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.6;
}

/* 交易指南区域 */
.za02b4guide-section {
    padding: 80px 0;
    background-color: #fff;
}

.za02b4guide-content {
    max-width: 1000px;
    margin: 0 auto;
}

.za02b4guide-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.za02b4guide-tab {
    padding: 12px 24px;
    background-color: #f5f5f5;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.3s;
}

.za02b4guide-tab:hover {
    background-color: #e0e0e0;
}

.za02b4guide-tab.za02b4tab-active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.za02b4guide-panels {
    position: relative;
    min-height: 300px;
}

.za02b4guide-panel {
    display: none;
    background-color: #f9f9f9;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.za02b4guide-panel.za02b4panel-active {
    display: block;
}

.za02b4guide-panel-title {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.za02b4guide-list {
    list-style: none;
    counter-reset: step-counter;
}

.za02b4guide-list li {
    counter-increment: step-counter;
    padding: 1rem 0 1rem 3rem;
    position: relative;
    color: #666;
    line-height: 1.8;
    border-bottom: 1px solid #e0e0e0;
}

.za02b4guide-list li:last-child {
    border-bottom: none;
}

.za02b4guide-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 1rem;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

/* 常见问题区域 */
.za02b4faq-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.za02b4faq-content {
    max-width: 900px;
    margin: 0 auto;
}

.za02b4faq-item {
    background-color: #fff;
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.za02b4faq-item:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.za02b4faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fff;
}

.za02b4faq-title {
    font-size: 1.1rem;
    color: #333;
    font-weight: 600;
    margin: 0;
}

.za02b4faq-icon {
    font-size: 1.5rem;
    color: #667eea;
    font-weight: bold;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #f0f0f0;
    transition: all 0.3s;
}

.za02b4faq-item.za02b4faq-active .za02b4faq-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.za02b4faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 1.5rem;
}

.za02b4faq-item.za02b4faq-active .za02b4faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

.za02b4faq-answer p {
    color: #666;
    line-height: 1.8;
    margin: 0;
}

/* 功能特色区域 */
.za02b4features-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.za02b4features-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

/* 主要特色 - 大卡片布局 */
.za02b4features-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.za02b4feature-card {
    background-color: #fff;
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.za02b4feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.za02b4feature-card:hover::before {
    transform: scaleX(1);
}

.za02b4feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.za02b4feature-card-large {
    text-align: left;
}

.za02b4feature-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.za02b4feature-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    flex-shrink: 0;
}

.za02b4icon-large {
    font-size: 3rem;
    width: 70px;
    height: 70px;
}

.za02b4feature-title {
    font-size: 1.5rem;
    color: #333;
    margin: 0;
    font-weight: bold;
    line-height: 1.3;
}

.za02b4feature-text {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.za02b4feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
}

.za02b4feature-list li {
    color: #555;
    font-size: 0.95rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.za02b4feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 1.1rem;
}

/* 次要特色 - 小卡片网格 */
.za02b4features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (min-width: 1200px) {
    .za02b4features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.za02b4feature-card-small {
    text-align: center;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.za02b4feature-card-small .za02b4feature-icon {
    margin-bottom: 1rem;
    width: 55px;
    height: 55px;
    font-size: 2rem;
}

.za02b4feature-card-small .za02b4feature-title {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    text-align: center;
}

.za02b4feature-card-small .za02b4feature-text {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    text-align: center;
    flex-grow: 1;
}

.za02b4feature-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: auto;
}

/* 页脚样式 */
.za02b4footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: #fff;
    padding: 50px 0 20px;
}

.za02b4footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.za02b4footer-section {
    margin-bottom: 1rem;
}

.za02b4footer-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.za02b4footer-heading {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.za02b4footer-text {
    color: #ccc;
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.za02b4footer-links {
    list-style: none;
}

.za02b4footer-links li {
    margin-bottom: 0.5rem;
}

.za02b4footer-link {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.za02b4footer-link:hover {
    color: #fff;
}

.za02b4footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.za02b4footer-copyright {
    color: #ccc;
    font-size: 0.9rem;
}

/* 响应式设计 */

/* 大屏幕优化 (1200px+) */
@media (min-width: 1200px) {
    .za02b4container {
        max-width: 1200px;
        padding: 0 30px;
    }

    .za02b4hero-title {
        font-size: 3.5rem;
    }

    .za02b4hero-subtitle {
        font-size: 1.4rem;
    }
}

/* 中等屏幕 (平板横屏 1024px - 1199px) */
@media (max-width: 1199px) and (min-width: 1024px) {
    .za02b4container {
        padding: 0 25px;
    }

    .za02b4hero-title {
        font-size: 2.8rem;
    }

    .za02b4features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 平板设备 (768px - 1023px) */
@media (max-width: 1023px) and (min-width: 768px) {
    .za02b4hero-wrapper {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .za02b4hero-content {
        text-align: center;
        order: 1;
    }

    .za02b4hero-buttons {
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
    }

    .za02b4hero-image {
        order: 2;
    }

    .za02b4hero-title {
        font-size: 2.5rem;
    }

    .za02b4hero-subtitle {
        font-size: 1.1rem;
    }

    .za02b4features-main {
        grid-template-columns: 1fr;
    }

    .za02b4features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .za02b4download-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .za02b4section-title {
        font-size: 2.2rem;
    }
}

/* 小屏幕平板 (481px - 767px) */
@media (max-width: 767px) and (min-width: 481px) {
    .za02b4hero-wrapper {
        gap: 2rem;
    }

    .za02b4hero-title {
        font-size: 2rem;
    }

    .za02b4hero-subtitle {
        font-size: 1rem;
    }

    .za02b4hero-img {
        max-width: 75%;
    }

    .za02b4hero-buttons {
        justify-content: center;
        align-items: center;
    }

    .za02b4features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.2rem;
    }

    .za02b4download-content {
        grid-template-columns: 1fr;
    }
}

/* 移动设备 (≤768px) */
@media (max-width: 768px) {
    .za02b4nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s ease;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        z-index: 999;
    }

    .za02b4nav-active {
        left: 0;
    }

    .za02b4nav-list {
        flex-direction: column;
        gap: 1.5rem;
        width: 100%;
    }

    .za02b4nav-link {
        display: block;
        padding: 0.8rem 0;
        font-size: 1.1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .za02b4mobile-menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .za02b4logo-text {
        font-size: 1.5rem;
    }

    .za02b4hero-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .za02b4hero-content {
        text-align: center;
        order: 1;
    }

    .za02b4hero-buttons {
        justify-content: center;
        align-items: center;
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .za02b4btn {
        width: 100%;
        max-width: 300px;
        padding: 14px 24px;
        font-size: 1rem;
        margin: 0 auto;
    }

    .za02b4hero-title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .za02b4hero-subtitle {
        font-size: 1rem;
        line-height: 1.6;
    }

    .za02b4hero-image {
        order: 2;
    }

    .za02b4hero-img {
        max-width: 80%;
        height: auto;
    }

    .za02b4hero {
        padding: 50px 0;
    }

    .za02b4section-title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .za02b4section-description {
        font-size: 1rem;
    }

    .za02b4download-section,
    .za02b4features-section,
    .za02b4guide-section,
    .za02b4faq-section {
        padding: 50px 0;
    }

    .za02b4download-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .za02b4features-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .za02b4features-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .za02b4feature-list {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .za02b4steps-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .za02b4guide-tabs {
        flex-direction: column;
        gap: 0.8rem;
    }

    .za02b4guide-tab {
        width: 100%;
        text-align: center;
    }

    .za02b4download-steps {
        padding: 2rem 1.5rem;
    }

    .za02b4footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .za02b4coins-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

/* 小屏幕手机 (≤480px) */
@media (max-width: 480px) {
    .za02b4hero-wrapper {
        gap: 1.5rem;
    }

    .za02b4hero-title {
        font-size: 1.6rem;
        line-height: 1.2;
    }

    .za02b4hero-subtitle {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .za02b4hero-img {
        max-width: 70%;
    }

    .za02b4hero {
        padding: 40px 0;
    }

    .za02b4section-title {
        font-size: 1.6rem;
        line-height: 1.3;
    }

    .za02b4section-description {
        font-size: 0.9rem;
    }

    .za02b4btn {
        padding: 12px 20px;
        font-size: 0.95rem;
        min-height: 44px; /* 触摸友好 */
        margin: 0 auto;
    }

    .za02b4hero-buttons {
        justify-content: center;
        align-items: center;
    }

    .za02b4download-card {
        padding: 1.5rem 1.2rem;
    }

    .za02b4download-icon {
        font-size: 3rem;
    }

    .za02b4download-title {
        font-size: 1.3rem;
    }

    .za02b4feature-card {
        padding: 1.8rem 1.2rem;
    }

    .za02b4feature-card-large {
        padding: 1.8rem 1.2rem;
    }

    .za02b4feature-card-small {
        padding: 1.5rem 1rem;
    }

    .za02b4feature-card-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .za02b4feature-card-large {
        text-align: center;
    }

    .za02b4feature-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }

    .za02b4icon-large {
        width: 60px;
        height: 60px;
        font-size: 2.5rem;
    }

    .za02b4guide-panel {
        padding: 1.5rem 1.2rem;
    }

    .za02b4guide-list li {
        padding: 0.8rem 0 0.8rem 2.5rem;
        font-size: 0.9rem;
    }

    .za02b4faq-question {
        padding: 1.2rem;
    }

    .za02b4faq-title {
        font-size: 1rem;
    }

    .za02b4download-steps {
        padding: 1.5rem 1.2rem;
    }

    .za02b4steps-title {
        font-size: 1.5rem;
    }

    .za02b4coins-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }

    .za02b4coin-item {
        padding: 1.2rem 0.8rem;
    }

    .za02b4navbar {
        padding: 0.8rem 0;
    }

    .za02b4logo-text {
        font-size: 1.3rem;
    }
}

/* 横屏模式优化 */
@media (max-width: 768px) and (orientation: landscape) {
    .za02b4hero {
        padding: 40px 0;
    }

    .za02b4hero-wrapper {
        gap: 1.5rem;
    }

    .za02b4hero-title {
        font-size: 1.8rem;
    }

    .za02b4hero-subtitle {
        font-size: 0.95rem;
    }

    .za02b4hero-img {
        max-width: 60%;
    }
}

/* 超小屏幕 (≤360px) */
@media (max-width: 360px) {
    .za02b4hero-title {
        font-size: 1.4rem;
    }

    .za02b4hero-subtitle {
        font-size: 0.85rem;
    }

    .za02b4section-title {
        font-size: 1.4rem;
    }

    .za02b4btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .za02b4container {
        padding: 0 10px;
    }
}

/* 触摸优化 */
@media (hover: none) and (pointer: coarse) {
    .za02b4btn,
    .za02b4nav-link,
    .za02b4guide-tab,
    .za02b4faq-question {
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }

    .za02b4btn:active {
        transform: scale(0.98);
    }
}

/* 图片响应式优化 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background-color: #667eea;
    color: #fff;
}

/* 防止文本选择（移动端优化） */
@media (max-width: 768px) {
    .za02b4btn,
    .za02b4nav-link {
        -webkit-user-select: none;
        user-select: none;
    }
}

/* 性能优化 - 减少动画（低性能设备） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 内页 / 列表 / 内容 / 侧栏 / 首页文章板块 ========== */
.za02b4logo-link {
    color: inherit;
    text-decoration: none;
}

.za02b4logo-link:hover {
    opacity: 0.9;
}

.za02b4nav-item.za02b4this > .za02b4nav-link,
.za02b4nav-item.za02b4this .za02b4nav-link {
    font-weight: 700;
    border-bottom: 2px solid rgba(255, 255, 255, 0.85);
}

.za02b4body-inner {
    background-color: #f5f5f5;
}

.za02b4inner-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 2.5rem 0 2rem;
}

.za02b4inner-hero-article {
    padding-bottom: 2.25rem;
}

.za02b4breadcrumb {
    font-size: 0.9rem;
    opacity: 0.95;
    margin-bottom: 0.75rem;
}

.za02b4breadcrumb a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.za02b4breadcrumb-sep {
    margin: 0 0.35rem;
    opacity: 0.8;
}

.za02b4inner-title {
    font-size: 2rem;
    line-height: 1.3;
    margin: 0 0 0.5rem;
    font-weight: 700;
}

.za02b4inner-desc {
    margin: 0;
    max-width: 900px;
    opacity: 0.95;
    line-height: 1.7;
}

.za02b4article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    margin: 0.75rem 0 0;
    font-size: 0.95rem;
    opacity: 0.95;
}

.za02b4layout-with-sidebar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2rem;
    align-items: start;
    padding: 2.5rem 20px 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.za02b4main {
    min-width: 0;
}

.za02b4sidebar {
    position: sticky;
    top: 88px;
}

.za02b4sidebar-block {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
    padding: 1rem 1rem 0.5rem;
    margin-bottom: 1.25rem;
}

.za02b4sidebar-title {
    font-size: 1.05rem;
    margin: 0 0 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #eef0ff;
    color: #333;
}

.za02b4sidebar-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.za02b4sidebar-card {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    text-decoration: none;
    color: inherit;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.za02b4sidebar-card:hover .za02b4sidebar-item-title {
    color: #667eea;
}

.za02b4sidebar-thumb {
    flex-shrink: 0;
    width: 88px;
    min-height: 1px;
}

.za02b4sidebar-thumb img {
    width: 88px;
    height: 66px;
    object-fit: cover;
    border-radius: 6px;
    display: block;
}

.za02b4sidebar-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.za02b4sidebar-item-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: #333;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.za02b4sidebar-meta {
    font-size: 0.75rem;
    color: #888;
}

.za02b4article-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.za02b4article-list-card {
    display: grid;
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 1.1rem;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s, box-shadow 0.2s;
}

.za02b4article-list-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.1);
}

.za02b4article-list-thumb img {
    width: 100%;
    height: 100%;
    min-height: 140px;
    object-fit: cover;
    display: block;
}

.za02b4article-list-body {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1rem 1.1rem 1rem 0;
}

.za02b4article-list-cat {
    font-size: 0.8rem;
    color: #667eea;
    font-weight: 600;
}

.za02b4article-list-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #222;
    line-height: 1.35;
}

.za02b4article-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: #888;
}

.za02b4article-list-intro {
    font-size: 0.92rem;
    color: #666;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.za02b4pagebar {
    margin-top: 2rem;
}

.za02b4pages-split .pagelist,
.za02b4pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 0.75rem;
    width: 100%;
    list-style: none;
    margin: 0;
    padding: 0.75rem 1rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.za02b4pages-split .pagelist li,
.za02b4pagelist li {
    flex: 0 0 auto;
}

.za02b4pages-split .pagelist a,
.za02b4pagelist a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.za02b4article {
    background: #fff;
    border-radius: 14px;
    padding: 1.5rem 1.5rem 2rem;
    box-shadow: 0 4px 22px rgba(0, 0, 0, 0.06);
}

.za02b4article-thumb-wrap {
    margin-bottom: 1rem;
    text-align: center;
}

.za02b4article-litpic {
    max-width: 100%;
    border-radius: 10px;
    margin: 0 auto;
}

.za02b4article-toolbar {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.za02b4prenext {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.za02b4prenext-single > * {
    display: block;
    width: 100%;
}

.za02b4prenext a {
    color: #667eea;
    text-decoration: none;
}

.za02b4typography {
    font-size: 1.05rem;
    line-height: 1.85;
    color: #333;
    word-break: break-word;
}

.za02b4typography img {
    max-width: 100%;
    height: auto;
}

.za02b4images-gallery {
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.za02b4images-item {
    margin: 0;
    background: #fafafa;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #eee;
}

.za02b4images-cap {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    color: #666;
}

.za02b4diyfield {
    margin-top: 1.25rem;
    padding: 1rem;
    background: #f9f9ff;
    border-radius: 10px;
    font-size: 0.95rem;
}

.za02b4meta-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.25rem 0 0;
    padding: 0;
}

.za02b4tagitem a {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: #eef0ff;
    color: #5a67d8;
    border-radius: 999px;
    text-decoration: none;
    font-size: 0.85rem;
}

.za02b4like-block {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.za02b4block-heading {
    font-size: 1.2rem;
    margin: 0 0 1rem;
    color: #333;
}

.za02b4like-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.za02b4like-link {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    align-items: start;
}

.za02b4like-thumb img {
    width: 100px;
    height: 72px;
    object-fit: cover;
    border-radius: 8px;
}

.za02b4like-title {
    font-weight: 600;
    color: #222;
    display: block;
    margin-bottom: 0.25rem;
}

.za02b4like-desc {
    font-size: 0.88rem;
    color: #666;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.za02b4home-articles-section {
    padding: 70px 0;
    background-color: #fff;
}

.za02b4home-articles-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.1rem;
}

.za02b4home-article-card {
    margin: 0;
}

.za02b4home-article-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: #fafbff;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    border: 1px solid rgba(102, 126, 234, 0.12);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s, box-shadow 0.2s;
}

.za02b4home-article-link:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(102, 126, 234, 0.18);
}

.za02b4home-article-thumb img {
    width: 100%;
    aspect-ratio: 220 / 140;
    object-fit: cover;
    display: block;
}

.za02b4home-article-title {
    padding: 0.65rem 0.75rem 0.85rem;
    font-size: 0.92rem;
    font-weight: 600;
    line-height: 1.45;
    color: #333;
    text-align: center;
    min-height: 3.1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.za02b4footer-inline-link {
    color: #ccc;
    text-decoration: none;
}

.za02b4footer-inline-link:hover {
    color: #fff;
}

@media (max-width: 1100px) {
    .za02b4home-articles-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 991px) {
    .za02b4layout-with-sidebar {
        grid-template-columns: 1fr;
        padding-left: 15px;
        padding-right: 15px;
    }

    .za02b4sidebar {
        position: static;
        order: 2;
    }

    .za02b4main {
        order: 1;
    }
}

@media (max-width: 900px) {
    .za02b4home-articles-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .za02b4article-list-card {
        grid-template-columns: 160px minmax(0, 1fr);
    }
}

@media (max-width: 768px) {
    .za02b4nav {
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .za02b4inner-title {
        font-size: 1.55rem;
    }

    .za02b4home-articles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.85rem;
    }

    .za02b4article-list-card {
        grid-template-columns: 1fr;
    }

    .za02b4article-list-thumb img {
        min-height: 180px;
    }

    .za02b4article-list-body {
        padding: 0 1rem 1rem;
    }

    .za02b4pages-split .pagelist,
    .za02b4pagelist {
        justify-content: center;
    }

    .za02b4like-link {
        grid-template-columns: 88px minmax(0, 1fr);
    }

    .za02b4like-thumb img {
        width: 88px;
        height: 64px;
    }
}

@media (max-width: 520px) {
    .za02b4home-articles-grid {
        grid-template-columns: 1fr;
    }

    .za02b4home-article-title {
        min-height: auto;
    }
}