* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0a0414;
    background-image: url('https://starpronto.oss-us-east-1.aliyuncs.com/Quanta/images/back.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: #ffffff;
    min-height: 100vh;
    min-width: 1400px;
    width: 100%;
    overflow-x: auto;
    position: relative;
}

.container {
    width: 100%;
    min-height: 100vh;
    position: relative;
    padding: 60px 20px 20px;
}

/* 标题区域 */
.header {
    text-align: center;
    position: relative;
    z-index: 10;
    margin-bottom: 60px;
}

.main-title {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.subtitle {
    font-size: 14px;
    color: #b4a5c8;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 中心Logo */
.center-logo {
    position: absolute;
    top: 260px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
}

.logo-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e8e8e8 0%, #a8a8a8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.logo-circle img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

/* 手机界面容器 */
.phones-container {
    position: relative;
    width: 100%;
    max-width: 1100px;
    margin: 100px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phones-container img {
    width: 100%;
    height: auto;
    display: block;
}


/* 响应式设计 */
@media (max-width: 1024px) {
    .main-title {
        font-size: 36px;
    }
    
    .phones-container {
        max-width: 900px;
        margin-top: 80px;
    }
    
    .center-logo {
        top: 240px;
    }
    
    .logo-circle {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    .main-title {
        font-size: 28px;
    }
    
    .subtitle {
        font-size: 12px;
        padding: 0 10px;
    }
    
    .phones-container {
        max-width: 100%;
        margin-top: 60px;
    }
    
    .center-logo {
        top: 200px;
    }
    
    .logo-circle {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 40px 10px 10px;
    }
    
    .main-title {
        font-size: 24px;
    }
    
    .subtitle {
        font-size: 11px;
    }
    
    .center-logo {
        top: 160px;
    }
    
    .logo-circle {
        width: 60px;
        height: 60px;
    }
    
    .phones-container {
        margin-top: 40px;
    }
    
    .section-two-container {
        padding: 0 10px;
    }
    
    .phones-detail-image {
        transform: translateY(-80px);
    }
}

/* 第二模块样式 */
.section-two {
    width: 100%;
    position: relative;
    margin-top: -183px;
    padding-bottom: 100px;
}

.section-two-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    padding: 0 20px;
}

/* 下层：深色背景容器 */
.dark-background {
    width: 100%;
    position: relative;
    z-index: 10;
}

.dark-background img {
    width: 100%;
    height: auto;
    display: block;
}

/* 视频容器样式 */
.dark-background .video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 15;
}

.dark-background .video-container video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

/* 上层：手机界面详细图片（向上偏移遮挡第一部分） */
.phones-detail-image {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -150px);
    width: 90%;
    max-width: 1200px;
}

.phones-detail-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 第二模块响应式 */
@media (max-width: 1024px) {
    .section-two {
        margin-top: 80px;
    }
    
    .phones-detail-image {
        transform: translate(-50%, -120px);
        width: 92%;
    }
}

@media (max-width: 768px) {
    .section-two {
        margin-top: 60px;
    }
    
    .phones-detail-image {
        transform: translate(-50%, -100px);
        width: 95%;
    }
}

/* ==================== 第三模块：Automated Policy Enforcement ==================== */
.section-three {
    width: 100%;
    padding: 100px 20px;
    position: relative;
}

/* 模块头部 */
.section-three-header {
    max-width: 1400px;
    margin: 0 auto 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 60px;
}

.section-title {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin: 0;
    color: #ffffff;
    flex-shrink: 0;
    max-width: 400px;
}

.top-description {
    text-align: left;
    max-width: 450px;
}

.top-description p {
    font-size: 16px;
    line-height: 1.7;
    color: #b4a5c8;
    margin: 0;
}

/* 模块内容容器 */
.section-three-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

/* 左侧内容 */
.left-content {
    display: flex;
    flex-direction: column;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 推荐货币卡片 - 上部分 */
.recommended-card {
    width: 100%;
    background-color: #1e1226;
    padding: 30px;
}

.recommended-card img {
    width: 100%;
    height: auto;
    display: block;
}

/* 卡片信息 - 下部分容器 */
.card-info {
    width: 100%;
    background-color: #151018;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* 卡片主标题 */
.card-main-title {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
    margin: 0;
    color: #ffffff;
}

/* 卡片描述 */
.card-description {
    font-size: 15px;
    line-height: 1.6;
    color: #b4a5c8;
    margin: 0;
}

/* 底部Logo */
.card-logo {
    width: 100px;
    height: 100px;
    margin: 20px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-logo img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0.5;
}

/* 中间内容区域 */
.middle-content {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* 数据分类标题（独立在外） */
.categories-title {
    font-size: 20px;
    font-weight: 500;
    margin: 0;
    color: #ffffff;
    background-color: #150f19;
    height: 100px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
}

/* 筛选按钮 */
.filter-buttons {
    width: 100%;
    display: flex;
    justify-content: flex-start;
}

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

/* 加密货币列表 */
.crypto-list {
    background: rgba(30, 20, 50, 0.6);
    border-radius: 20px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.list-title {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 20px 0;
    color: #b4a5c8;
    letter-spacing: 0.5px;
}

.crypto-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.crypto-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.crypto-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.crypto-name {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.crypto-name .name {
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 5px;
}

.fire-icon {
    font-size: 14px;
    display: inline-block;
    animation: flicker 1.5s infinite alternate;
}

@keyframes flicker {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.crypto-name .full-name {
    font-size: 12px;
    color: #b4a5c8;
}

.crypto-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.crypto-price .price {
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
}

.crypto-price .change {
    font-size: 12px;
    font-weight: 500;
}

.crypto-price .change.positive {
    color: #10b981;
}

.crypto-price .change.negative {
    color: #ef4444;
}

/* 右侧手机界面 */
.right-phone {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.right-phone img {
    width: 100%;
    max-width: 320px;
    height: auto;
    display: block;
}

/* 响应式设计 - 第三模块 */
@media (max-width: 1200px) {
    .section-three-header {
        flex-direction: column;
        gap: 30px;
        text-align: left;
    }

    .section-title {
        font-size: 36px;
        max-width: 100%;
    }

    .top-description {
        text-align: left;
        max-width: 100%;
    }

    .section-three-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .right-phone {
        justify-content: center;
    }

    .right-phone img {
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .section-three {
        padding: 60px 15px;
    }

    .section-three-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 28px;
    }

    .top-description p {
        font-size: 14px;
    }

    .categories-title {
        width: 100%;
        max-width: 450px;
        height: auto;
        min-height: 100px;
        font-size: 18px;
    }

    .card-main-title {
        font-size: 24px;
    }

    .card-description {
        font-size: 14px;
    }

    .crypto-icon {
        width: 32px;
        height: 32px;
    }
}

/* ==================== 第四模块：智能功能展示 ==================== */
.section-four {
    width: 100%;
    padding: 100px 20px;
    position: relative;
}

/* 模块头部 */
.section-four-header {
    padding-left: 70px;
    max-width: 1400px;
    margin: 0 auto 60px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 60px;
}

.section-title-four {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin: 0;
    color: #ffffff;
    flex-shrink: 0;
    max-width: 400px;
}

.section-description {
    text-align: left;
    max-width: 450px;
}

.section-description p {
    font-size: 15px;
    line-height: 1.7;
    color: #b4a5c8;
    margin: 0;
}

/* 模块内容容器 */
.section-four-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 20px;
    align-items: start;
}

/* 左侧手机界面 */
.left-phone {
    position: sticky;
    top: 100px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.left-phone img {
    width: 100%;
    max-width: 300px;
    height: auto;
    display: block;
}

/* 右侧内容区域 */
.right-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    padding-top: 50px;
}

/* 功能卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    position: relative;
}

/* 功能卡片 */
.feature-card {
    border-radius: 24px;
    padding: 35px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* 第一个卡片：Future Potential Assessment */
.feature-card:nth-child(1) {
    background: linear-gradient(135deg, #1a1222 0%, #161019 100%);
}

/* 第二个卡片：24/7 Intelligent Q&A */
.feature-card:nth-child(2) {
    background: linear-gradient(135deg, #1a151e 0%, #141414 100%);
}

/* 第三个卡片：Product Comparison Tool */
.feature-card:nth-child(3) {
    background: linear-gradient(135deg, #1a1121 0%, #120e15 100%);
}

/* 第四个卡片：AI Deep Product Review */
.feature-card:nth-child(4) {
    background: linear-gradient(135deg, #19161a 0%, #141414 100%);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.2);
    border-color: rgba(168, 85, 247, 0.3);
}

/* 功能卡片头部 - 图标和标题容器 */
.feature-header {
    display: flex;
    align-items: center;
    gap: 44px;
}

/* 功能图标 */
.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon img {
    width: 64px;
    height: 64px;
    display: block;
}

/* 功能标题 */
.feature-title {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.3;
    margin: 0;
    color: #ffffff;
    flex: 1;
}

/* 功能描述 */
.feature-description {
    font-size: 14px;
    line-height: 1.7;
    color: #9ca3af;
    margin: 0;
}

/* 中心Logo */
.center-quanta-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    pointer-events: none;
}

.center-quanta-logo img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 1;
    filter: drop-shadow(0 4px 30px rgba(255, 255, 255, 0.15));
}

/* 响应式设计 - 第四模块 */
@media (max-width: 1200px) {
    .section-four-header {
        flex-direction: column;
        gap: 30px;
        text-align: left;
    }

    .section-title-four {
        font-size: 36px;
        max-width: 100%;
    }

    .section-description {
        text-align: left;
        max-width: 100%;
    }

    .section-four-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .left-phone {
        position: relative;
        top: 0;
        justify-content: center;
    }

    .left-phone img {
        max-width: 350px;
    }

    .center-quanta-logo {
        width: 130px;
        height: 130px;
    }
}

@media (max-width: 768px) {
    .section-four {
        padding: 60px 15px;
    }

    .section-four-header {
        margin-bottom: 40px;
    }

    .section-title-four {
        font-size: 28px;
    }

    .section-description p {
        font-size: 14px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 25px;
    }

    .feature-icon {
        width: 54px;
        height: 54px;
    }

    .feature-icon img {
        width: 54px;
        height: 54px;
    }

    .feature-title {
        font-size: 19px;
    }

    .feature-description {
        font-size: 13px;
    }

    .center-quanta-logo {
        width: 100px;
        height: 100px;
    }

    .left-phone img {
        max-width: 300px;
    }
}

/* ==================== 第五模块：风险管理 ==================== */
.section-five {
    width: 100%;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

.section-five-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.6fr 0.8fr 1fr;
    gap: 40px;
    align-items: center;
}

/* 左侧机器人 */
.robot-image-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    margin-top: 150px;
}

.robot-image-container img {
    width: 100%;
    max-width: 350px;
    height: auto;
    display: block;
    border-radius: 24px;
    background: linear-gradient(135deg, #1a1222 0%, #0f0a15 100%);
}

/* 中间手机 */
.center-phone {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    position: relative;
    z-index: 10;
    margin-top: -80px;
}

.center-phone img {
    width: 100%;
    max-width: 320px;
    height: auto;
    display: block;
}

/* 右侧内容 */
.risk-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    position: relative;
}

.risk-title {
    font-size: 65px;
    font-weight: 600;
    line-height: 1.2;
    margin: 0;
    color: #ffffff;
}

/* 风险卡片容器 */
.risk-cards {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* 风险卡片 */
.risk-card {
    background: #1e1629;
    border-radius: 24px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.risk-card:hover {
    transform: translateX(5px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.2);
    border-color: rgba(168, 85, 247, 0.3);
}

.risk-card-header {
    position: relative;
    margin-bottom: 15px;
}

.risk-card-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.3;
    margin: 0;
    color: #ffffff;
    padding-right: 80px;
}

.risk-card-icon {
    position: absolute;
    top: -101px;
    right: -32px;
    width: 120px;
    height: 120px;
    z-index: 10;
}

.risk-card:nth-child(2) .risk-card-icon {
    top: -70px;
    right: -51px;
}

.risk-card-icon img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.risk-card-description {
    font-size: 14px;
    line-height: 1.7;
    color: #9ca3af;
    margin: 0;
}

/* 装饰方块 */
.decoration-square {
    width: 80px;
    height: 80px;
    background: linear-gradient(180deg, #A837FF 0%, #652199 100%);
    border-radius: 20px;
    position: absolute;
    opacity: 0.4;
}

.decoration-top-left {
    top: -107px;
    right: -55px;
    z-index: 5;
}
.decoration-bottom-right {
    bottom: -112px;
    right: 11px;
    z-index: 1;
}

/* 响应式设计 - 第五模块 */
@media (max-width: 1200px) {
    .section-five-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .robot-image-container {
        margin-top: 0;
    }

    .robot-image-container img {
        max-width: 300px;
    }

    .center-phone {
        margin-top: 0;
    }

    .center-phone img {
        max-width: 280px;
    }

    .risk-title {
        font-size: 36px;
        text-align: center;
    }

    .robot-image-container,
    .center-phone {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .section-five {
        padding: 60px 15px;
    }

    .section-five-container {
        gap: 40px;
    }

    .robot-image-container {
        margin-top: 0;
    }

    .robot-image-container img {
        max-width: 250px;
    }

    .center-phone {
        margin-top: 0;
    }

    .center-phone img {
        max-width: 240px;
    }

    .risk-title {
        font-size: 28px;
    }

    .risk-card {
        padding: 25px;
        padding-top: 70px;
    }

    .risk-card-title {
        font-size: 18px;
        padding-right: 60px;
    }

    .risk-card-icon {
        width: 90px;
        height: 90px;
        top: -30px;
        right: -15px;
    }

    .risk-card-description {
        font-size: 13px;
    }

    .decoration-square {
        width: 50px;
        height: 50px;
    }

    .decoration-top-left {
        top: -107px;
        right: -55px;
    }
}

/* ==================== 第六模块：用户评价 ==================== */
.section-six {
    width: 100%;
    padding: 100px 20px;
    position: relative;
    background: rgba(10, 4, 20, 0.5);
}

.section-six-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 标题 */
.testimonials-title {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 60px;
    color: #ffffff;
    text-align: center;
}

/* 评价卡片网格 */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* 评价卡片 */
.testimonial-card {
    background: #1a1222;
    border-radius: 24px;
    padding: 40px 30px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(168, 85, 247, 0.2);
    border-color: rgba(168, 85, 247, 0.3);
}

/* 头像 */
.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 20px;
}

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

/* 用户名 */
.testimonial-name {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 15px;
    color: #ffffff;
}

/* 星级评分 */
.testimonial-rating {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.testimonial-rating .star {
    font-size: 20px;
    color: #a855f7;
}

/* 评价文字 */
.testimonial-text {
    font-size: 14px;
    line-height: 1.7;
    color: #b4a5c8;
    margin: 0;
}

/* 响应式设计 - 第六模块 */
@media (max-width: 1200px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .testimonials-title {
        font-size: 38px;
    }
}

@media (max-width: 768px) {
    .section-six {
        padding: 60px 15px;
    }

    .testimonials-title {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .testimonial-card {
        padding: 30px 25px;
    }

    .testimonial-avatar {
        width: 70px;
        height: 70px;
    }

    .testimonial-name {
        font-size: 20px;
    }

    .testimonial-rating .star {
        font-size: 18px;
    }

    .testimonial-text {
        font-size: 13px;
    }
}

/* ==================== 第七模块：下载引导 ==================== */
.section-seven {
    width: 100%;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

/* 中间背景图 */
.section-seven-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    pointer-events: none;
}

.section-seven-bg img {
    width: 100%;
    height: 400px;
    display: block;
    object-fit: cover;
}

.section-seven-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    position: relative;
    z-index: 1;
}

/* 左侧手机展示 */
.download-phones {
    display: flex;
    justify-content: center;
    align-items: center;
}

.download-phones img {
    width: auto;
    max-width: 900px;
    height: 900px;
    display: block;
    object-fit: contain;
}

/* 右侧内容 */
.download-content {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

/* 文字说明 */
.download-text {
    max-width: 600px;
}

.download-text p {
    font-size: 28px;
    line-height: 1.5;
    color: #ffffff;
    margin: 0;
    font-weight: 400;
}

/* 下载按钮容器 */
.download-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.download-btn {
    display: block;
    /* 设置为不可点击 */
    pointer-events: none;
}

.download-btn img {
    height: 60px;
    width: auto;
    display: block;
}

/* 响应式设计 - 第七模块 */
@media (max-width: 1200px) {
    .section-seven-bg {
        opacity: 0.3;
    }

    .section-seven-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .download-phones {
        order: 2;
    }

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

    .download-text p {
        font-size: 24px;
    }

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

@media (max-width: 768px) {
    .section-seven {
        padding: 60px 15px;
    }

    .section-seven-bg {
        opacity: 0.2;
    }

    .section-seven-container {
        gap: 40px;
    }

    .download-phones img {
        max-width: 400px;
    }

    .download-text p {
        font-size: 20px;
    }

    .download-btn img {
        height: 50px;
    }

    .download-buttons {
        gap: 15px;
    }
}

/* ================================
   页面底部 Footer
================================ */
.footer {
    background: transparent;
    padding: 40px 20px;
    margin-top: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-left .copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin: 0;
}