/* =========================================
       DUOMI Landing Page CSS (Refactored & Unified)
       ========================================= */

/* 1. 全局变量 (Colors & Theme) - 在此处统一修改颜色 */
:root {
    --dm-primary: #0d47a1;         /* 品牌主色调 (亮蓝) */
    --dm-primary-dark: #003366;    /* 品牌深色调 (深蓝) */
    --dm-accent: #E32B2E;          /* 强调色/按钮色 (红色) */
    --dm-accent-hover: #E32B2E;    /* 按钮悬停色 */
    --dm-success: #00a859;         /* 成功/亮点色 (绿色) */

    --dm-text-main: #333333;       /* 主要文字 */
    --dm-text-sub: #555555;        /* 次要文字 */
    --dm-text-light: #666666;      /* 浅色文字 */

    --dm-bg-body: #ffffff;
    --dm-bg-light: #f8f9fa;
    --dm-bg-alt: #fbfcff;
    --dm-border: #eaeaea;

    --dm-shadow-sm: 0 4px 10px rgba(0,0,0,0.05);
    --dm-shadow-md: 0 5px 15px rgba(0,0,0,0.08);
    --dm-shadow-lg: 0 15px 30px rgba(0,0,0,0.1);
}

/* 强力隔离：底层所有文字与排版标签的行为重置，防止全局样式泄露 */
.dm-landing-wrapper h1, .dm-landing-wrapper h2, .dm-landing-wrapper h3, .dm-landing-wrapper h4,
.dm-landing-wrapper p, .dm-landing-wrapper li, .dm-landing-wrapper strong,
.dm-landing-wrapper div, .dm-landing-wrapper th, .dm-landing-wrapper td, .dm-landing-wrapper a, .dm-landing-wrapper span {
    font-family: Arial, Helvetica, sans-serif !important;
    text-transform: none !important;
    letter-spacing: normal !important;
    box-sizing: border-box !important;
}

/* 2. 基础与重置 */
.dm-landing-wrapper {
    font-family: Arial, Helvetica, sans-serif !important;
    color: var(--dm-text-main) !important;
    line-height: 1.6 !important;
    margin: 0 !important;
    padding: 0 !important;
    background-color: var(--dm-bg-body) !important;
    display: block !important;
}
.dm-landing-wrapper * {
    box-sizing: border-box !important;
}

/* 3. 布局容器 */
.dm-section {
    padding: 60px 0 !important;
    display: block !important;
}
.dm-bg-light {
    background-color: var(--dm-bg-light) !important;
}
.dm-container {
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 0 20px !important;
    display: block !important;
}
.dm-text-center {
    text-align: center !important;
}

/* 4. 通用排版与组件 */
.dm-title {
    font-size: 36px !important;
    font-weight: bold !important;
    color: var(--dm-primary) !important;
    margin-bottom: 15px !important;
    line-height: 1.3 !important;
    text-align: center !important;
    display: block !important;
}
.dm-subtitle {
    font-size: 18px !important;
    color: var(--dm-text-light) !important;
    margin-bottom: 40px !important;
    max-width: 800px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    text-align: center !important;
    display: block !important;
    line-height: 1.6 !important;
}
.dm-btn {
    display: inline-block !important;
    padding: 16px 32px !important;
    background-color: var(--dm-accent) !important;
    color: #ffffff !important;
    font-size: 18px !important;
    font-weight: bold !important;
    text-decoration: none !important;
    border-radius: 5px !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 4px 10px rgba(255, 102, 0, 0.3) !important;
    border: none !important;
    text-transform: none !important;
}
.dm-btn:hover {
    background-color: var(--dm-accent-hover) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 15px rgba(255, 102, 0, 0.4) !important;
    color: #ffffff !important;
}

/* 5. 视频投流首屏 (Video Hero) */
.dm-hero-video-section {
    position: relative !important;
    height: 80vh !important;
    min-height: 600px !important;
    display: flex !important;
    align-items: center !important;
    background-color: #000000 !important;
    overflow: hidden !important;
}
.hero-video-wrapper {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 1 !important;
    opacity: 0.6 !important;
}
.hero-video-wrapper video {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
}
.hero-content {
    position: relative !important;
    z-index: 2 !important;
    text-align: center !important;
    color: #ffffff !important;
    max-width: 900px !important;
    margin: 0 auto !important;
    padding: 0 20px !important;
}
.hero-title {
    font-size: 3rem !important;
    font-weight: 800 !important;
    line-height: 1.2 !important;
    margin-bottom: 20px !important;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5) !important;
}
.hero-subtitle {
    font-size: 2rem !important;
    font-weight: 400 !important;
    margin-bottom: 40px !important;
    color: #dddddd !important;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5) !important;
}
.hero-trust {
    margin-top: 30px !important;
    font-size: 1.5rem !important;
    color: #aaaaaa !important;
    display: flex !important;
    justify-content: center !important;
    gap: 20px !important;
}
.hero-trust span {
    display: flex !important;
    align-items: center !important;
    gap: 5px !important;
    color: #aaaaaa !important;
    font-size: 1.5rem !important;
    font-weight: normal !important;
}

/* 6. 图文首屏 (Standard Hero) */
.dm-hero {
    display: flex !important;
    align-items: center !important;
    gap: 50px !important;
}
.dm-hero-text {
    flex: 1 !important;
    text-align: left !important;
}
.dm-hero-text h1 {
    font-size: 42px !important;
    color: #222222 !important;
    line-height: 1.2 !important;
    margin-bottom: 20px !important;
    font-weight: bold !important;
}
.dm-hero-text h1 span {
    color: var(--dm-primary) !important;
}
.dm-hero-text p {
    font-size: 18px !important;
    color: var(--dm-text-sub) !important;
    margin-bottom: 25px !important;
    line-height: 1.6 !important;
}
.dm-hero-features {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 0 35px 0 !important;
}
.dm-hero-features li {
    font-size: 18px !important;
    margin-bottom: 12px !important;
    position: relative !important;
    padding-left: 30px !important;
    color: var(--dm-text-main) !important;
    line-height: 1.6 !important;
    text-align: left !important;
}
.dm-hero-features li::before {
    content: '✔' !important;
    color: var(--dm-primary) !important;
    position: absolute !important;
    left: 0 !important;
    font-weight: bold !important;
    font-size: 20px !important;
    top: 0 !important;
}
.dm-hero-image {
    flex: 1 !important;
}
.dm-hero-image img {
    width: 100% !important;
    border-radius: 8px !important;
    box-shadow: var(--dm-shadow-lg) !important;
    display: block !important;
}

/* 7. 优势卡片网格 (Benefits Grid) */
.dm-benefits-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)) !important;
    gap: 30px !important;
}
.dm-card {
    background: #ffffff !important;
    padding: 35px 25px !important;
    border-radius: 8px !important;
    box-shadow: var(--dm-shadow-sm) !important;
    border-top: 4px solid var(--dm-primary) !important;
    transition: transform 0.3s !important;
    box-sizing: border-box !important;
}
.dm-card:hover {
    transform: translateY(-5px) !important;
}
.dm-card h3 {
    font-size: 22px !important;
    color: var(--dm-primary) !important;
    margin: 0 0 15px 0 !important;
    font-weight: bold !important;
    line-height: 1.4 !important;
    text-align: left !important;
}
.dm-card p {
    color: var(--dm-text-sub) !important;
    font-size: 16px !important;
    line-height: 1.6 !important;
    margin: 0 !important;
    text-align: left !important;
}
.adv-icon {
    font-size: 2rem !important;
    margin-bottom: 15px !important;
    display: block !important;
    text-align: left !important;
}

/* 8. 案例分析模块 (Case Study Custom Card) */
.dm-case-card {
    background: #ffffff !important;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06) !important;
    border-radius: 12px !important;
    overflow: hidden !important;
    padding: 0 !important;
    margin: 0 auto !important;
    display: block !important;
}
.dm-case-card .dm-header {
    padding: 40px 40px 20px !important;
    text-align: center !important;
    border-bottom: 1px solid var(--dm-border) !important;
    display: block !important;
    background: #ffffff !important;
}
.dm-case-card .dm-header h2 {
    color: var(--dm-primary-dark) !important;
    font-size: 32px !important;
    font-weight: 700 !important;
    margin: 0 0 15px 0 !important;
    line-height: 1.3 !important;
    text-align: center !important;
}
.dm-case-card .dm-header p, .dm-landing-wrapper .dm-content-body p {
    color: var(--dm-text-light) !important;
    font-size: 18px !important;
    font-weight: 500 !important;
    margin: 0 0 16px 0 !important;
    line-height: 1.7 !important;
    text-align: left !important;
}
.dm-case-card .dm-header p {
    text-align: center !important;
    margin: 0 !important;
}
.dm-case-card .dm-video-container {
    padding: 30px 40px !important;
    background-color: #000000 !important;
    display: block !important;
}
.dm-case-card .dm-video-wrapper {
    position: relative !important;
    padding-bottom: 56.25% !important;
    height: 0 !important;
    border-radius: 8px !important;
    overflow: hidden !important;
    box-shadow: var(--dm-shadow-md) !important;
}
.dm-case-card .dm-video-wrapper iframe {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: none !important;
}
.dm-case-card .dm-content-body {
    padding: 40px !important;
    display: block !important;
    background: #ffffff !important;
}
.dm-text-block {
    margin-bottom: 40px !important;
    display: block !important;
}
.dm-text-block h3 {
    color: var(--dm-primary-dark) !important;
    font-size: 24px !important;
    border-left: 4px solid var(--dm-accent) !important;
    padding-left: 15px !important;
    margin: 30px 0 20px 0 !important;
    font-weight: bold !important;
    line-height: 1.4 !important;
    text-align: left !important;
    border-top: none !important;
    border-right: none !important;
    border-bottom: none !important;
    display: block !important;
}
.dm-text-block h4 {
    font-size: 18px !important;
    color: var(--dm-primary-dark) !important;
    font-weight: bold !important;
    margin: 20px 0 12px 0 !important;
    line-height: 1.4 !important;
    display: block !important;
    text-align: left !important;
}
.dm-text-block ul {
    list-style-type: none !important;
    padding: 0 !important;
    margin: 15px 0 20px 0 !important;
    display: block !important;
}
.dm-text-block li {
    margin-bottom: 10px !important;
    font-size: 16px !important;
    color: var(--dm-text-sub) !important;
    line-height: 1.7 !important;
    display: block !important;
    text-align: left !important;
}

/* 自定义前置方块，规避全局无序列表错乱与双圆点污染 */
.dm-text-block ul:not(.dm-hero-features) li {
    position: relative !important;
    padding-left: 20px !important;
}
.dm-text-block ul:not(.dm-hero-features) li::before {
    content: "■" !important;
    color: var(--dm-accent) !important;
    font-size: 10px !important;
    position: absolute !important;
    left: 0 !important;
    top: 2px !important;
}
/* 针对自带 ✅ 表情符号的优势列表进行特殊过滤，清除左侧内边距与前置方块，防止图标重叠 */
.dm-text-block ul:not(.dm-hero-features) li:not(:has(strong)) {
    padding-left: 0 !important;
}
.dm-text-block ul:not(.dm-hero-features) li:not(:has(strong))::before {
    display: none !important;
}

.dm-text-block strong {
    font-weight: bold !important;
    color: #111111 !important;
    display: inline !important;
}

.dm-text-block > div {
    margin-bottom: 25px !important;
    display: block !important;
}
.dm-text-block > div > strong {
    font-size: 18px !important;
    color: var(--dm-primary-dark) !important;
    display: block !important;
    margin: 0 0 10px 0 !important;
    font-weight: 700 !important;
}

/* 9. 图片画廊 (Gallery) */
.dm-image-gallery {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 20px !important;
    margin: 40px 0 !important;
}
.dm-img-card {
    border-radius: 8px !important;
    overflow: hidden !important;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1) !important;
    background: #ffffff !important;
    display: block !important;
}
.dm-img-card img {
    width: 100% !important;
    height: 200px !important;
    object-fit: cover !important;
    display: block !important;
    transition: transform 0.3s ease !important;
    border: none !important;
}
.dm-img-card img:hover {
    transform: scale(1.05) !important;
}
.dm-img-caption {
    padding: 12px !important;
    font-size: 14px !important;
    color: var(--dm-text-sub) !important;
    text-align: center !important;
    background: var(--dm-bg-light) !important;
    border-top: 1px solid #eeeeee !important;
    font-weight: 600 !important;
    display: block !important;
    line-height: 1.4 !important;
}

/* 10. ROI 数据表格 (ROI & Specs Table) */
.dm-table-wrapper {
    overflow-x: auto !important;
    margin: 30px 0 !important;
    display: block !important;
    width: 100% !important;
}
.dm-roi-table, .dm-specs-table {
    width: 100% !important;
    border-collapse: collapse !important;
    border-spacing: 0 !important;
    background: #ffffff !important;
    margin: 0 !important;
    display: table !important;
}
.dm-roi-table th, .dm-roi-table td, .dm-specs-table th, .dm-specs-table td {
    padding: 15px 25px !important;
    text-align: left !important;
    border-bottom: 1px solid #dddddd !important;
    font-size: 16px !important;
    line-height: 1.4 !important;
    background: transparent !important;
}
.dm-roi-table th {
    background-color: var(--dm-primary-dark) !important;
    color: #ffffff !important;
    font-weight: 600 !important;
    border: 1px solid var(--dm-primary-dark) !important;
}
.dm-roi-table td {
    border-bottom: 1px solid #dddddd !important;
    color: var(--dm-text-main) !important;
    background: #ffffff !important;
}
.dm-specs-table th {
    background-color: var(--dm-primary) !important;
    color: #ffffff !important;
    width: 35% !important;
    font-weight: normal !important;
    border: 1px solid var(--dm-primary) !important;
}
.dm-specs-table td {
    color: var(--dm-text-main) !important;
    background: #ffffff !important;
    border: 1px solid #dddddd !important;
}
.dm-roi-table tr:hover td {
    background-color: #f1f5f9 !important;
}
.dm-specs-table tr:nth-child(even) td {
    background-color: var(--dm-bg-alt) !important;
}
.dm-specs-wrapper {
    background: #ffffff !important;
    border-radius: 8px !important;
    box-shadow: var(--dm-shadow-md) !important;
    overflow: hidden !important;
    display: block !important;
    border: 1px solid #dddddd !important;
}
.dm-specs-table tr:last-child th, .dm-specs-table tr:last-child td {
    border-bottom: none !important;
}
.dm-highlight {
    color: var(--dm-success) !important;
    font-weight: bold !important;
}
.dm-highlight strong {
    color: var(--dm-success) !important;
}
.dm-highlight-data {
    font-weight: bold !important;
    color: var(--dm-accent) !important;
}

/* 11. 呼吁行动区块 (CTA Box) */
.dm-cta-box {
    background: var(--dm-primary-dark) !important;
    color: #ffffff !important;
    text-align: center !important;
    padding: 40px !important;
    border-radius: 0 0 12px 12px !important;
    display: block !important;
    margin-top: 30px !important;
}
.dm-cta-box h3 {
    margin-top: 0 !important;
    color: #ffffff !important;
    font-size: 26px !important;
    font-weight: bold !important;
    line-height: 1.3 !important;
    margin-bottom: 15px !important;
    text-align: center !important;
    border: none !important;
    padding: 0 !important;
    display: block !important;
}
.dm-cta-box p {
    color: #dddddd !important;
    font-size: 16px !important;
    line-height: 1.6 !important;
    margin: 0 0 25px 0 !important;
    text-align: center !important;
    max-width: 800px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    display: block !important;
}

/* 12. 视频网格 (Video Grid) */
.dm-video-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)) !important;
    gap: 30px !important;
}
.dm-video-item {
    background: #ffffff !important;
    padding: 10px !important;
    border-radius: 8px !important;
    box-shadow: var(--dm-shadow-md) !important;
    display: block !important;
}
.dm-video-item iframe {
    width: 100% !important;
    height: 280px !important;
    border-radius: 4px !important;
    border: none !important;
    display: block !important;
}
.dm-video-title {
    text-align: center !important;
    padding: 15px 0 5px 0 !important;
    font-weight: bold !important;
    color: var(--dm-text-main) !important;
    font-size: 16px !important;
    line-height: 1.4 !important;
    display: block !important;
}

/* 13. 相关机型 (Related Models) */
.dm-related-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 25px !important;
}
.dm-related-item {
    background: #ffffff !important;
    border: 1px solid var(--dm-border) !important;
    border-radius: 8px !important;
    overflow: hidden !important;
    transition: all 0.3s ease !important;
    text-align: center !important;
    padding-bottom: 20px !important;
    display: block !important;
}
.dm-related-item:hover {
    box-shadow: var(--dm-shadow-lg) !important;
    border-color: var(--dm-primary) !important;
}
.dm-related-item img {
    width: 100% !important;
    height: 400px !important;
    object-fit: cover !important;
    background-color: #f4f4f4 !important;
    display: block !important;
    border: none !important;
}
.dm-related-item h4 {
    font-size: 18px !important;
    color: var(--dm-text-main) !important;
    margin: 20px 15px !important;
    min-height: 54px !important;
    font-weight: bold !important;
    line-height: 1.4 !important;
    text-align: center !important;
    display: block !important;
}
.dm-link-btn {
    color: var(--dm-primary) !important;
    font-weight: bold !important;
    text-decoration: none !important;
    border-bottom: 2px solid transparent !important;
    transition: border 0.3s !important;
    display: inline-block !important;
    font-size: 16px !important;
}
.dm-related-item:hover .dm-link-btn {
    border-bottom: 2px solid var(--dm-primary) !important;
}


/* FAQ Section Styles - Reusing existing landing variables */
.dm-faq-wrapper {
    background: #ffffff !important;
    border-radius: 8px !important;
    box-shadow: var(--dm-shadow-md) !important;
    overflow: hidden !important;
    border: 1px solid #dddddd !important;
    margin-top: 30px !important;
}

.dm-faq-item {
    border-bottom: 1px solid #dddddd !important;
}

.dm-faq-item:last-child {
    border-bottom: none !important;
}

/* Accordion Trigger (Hidden Checkbox Hack for No-JS compatibility) */
.dm-faq-toggle {
    display: none !important;
}

.dm-faq-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 18px 25px !important;
    background-color: #ffffff !important;
    color: var(--dm-primary-dark) !important;
    font-size: 18px !important;
    font-weight: bold !important;
    cursor: pointer !important;
    margin: 0 !important;
    transition: background-color 0.3s ease !important;
    user-select: none !important;
    line-height: 1.4 !important;
}

.dm-faq-header:hover {
    background-color: var(--dm-bg-alt) !important;
}

/* Arrow Icon using CSS */
.dm-faq-icon {
    font-size: 16px !important;
    color: var(--dm-primary) !important;
    transition: transform 0.3s ease !important;
    font-weight: bold !important;
}

/* Content Box Area */
.dm-faq-content {
    max-height: 0 !important;
    overflow: hidden !important;
    transition: max-height 0.3s cubic-bezier(0, 1, 0, 1) !important;
    background-color: #ffffff !important;
}

.dm-faq-content-inner {
    padding: 20px 25px !important;
    color: var(--dm-text-sub) !important;
    font-size: 16px !important;
    line-height: 1.7 !important;
    border-top: 1px solid #eaeaea !important;
    background-color: var(--dm-bg-light) !important;
}

/* Accordion Open States */
.dm-faq-toggle:checked ~ .dm-faq-header {
    background-color: var(--dm-bg-alt) !important;
    border-bottom: 1px solid #eaeaea !important;
}

.dm-faq-toggle:checked ~ .dm-faq-header .dm-faq-icon {
    transform: rotate(180deg) !important;
}

.dm-faq-toggle:checked ~ .dm-faq-content {
    max-height: 1000px !important; /* Smooth expansion */
    transition: max-height 0.3s cubic-bezier(0.5, 1, 1, 1) !important;
}


/* =========================================
   响应式调整 (Responsive & Media Queries)
   ========================================= */
/*@media (max-width: 1612px) { .version-pro { padding-top: 210px !important; } }*/
.yige-language{display: none !important;}
@media (max-width: 1110px) { .version-pro { padding-top: 210px !important; } }
@media (max-width: 992px) { .version-pro { padding-top: 187px !important; } }

@media (max-width: 992px) {
    .dm-hero { flex-direction: column !important; text-align: center !important; gap: 30px !important; }
    .dm-hero-text { text-align: center !important; }
    .dm-hero-text h1 { font-size: 32px !important; }
    .dm-hero-features li { padding-left: 0 !important; text-align: center !important; }
    .dm-hero-features li::before { position: relative !important; margin-right: 10px !important; display: inline-block !important; top: 2px !important; }
    .dm-related-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important; }
    .dm-specs-table th, .dm-specs-table td { padding: 12px 15px !important; }
    .hero-title { font-size: 2.2rem !important; }
    .dm-card h3 { text-align: center !important; }
    .dm-card p { text-align: center !important; }
    .adv-icon { text-align: center !important; }
}

@media (max-width: 768px) {
    .version-pro { padding-top: 68px !important; }
    .dm-case-card .dm-header, .dm-case-card .dm-content-body { padding: 20px !important; }
    .dm-case-card .dm-video-container { padding: 20px !important; }
    .dm-image-gallery { grid-template-columns: 1fr !important; }
    .dm-case-card .dm-header h2 { font-size: 24px !important; }
    .dm-video-grid { grid-template-columns: 1fr !important; }
    .dm-title { font-size: 28px !important; }
    .dm-subtitle { font-size: 16px !important; }
    .dm-text-block h3 { font-size: 20px !important; }
    .dm-roi-table th, .dm-roi-table td { padding: 12px 10px !important; font-size: 14px !important; }
    .dm-cta-box h3 { font-size: 22px !important; }
    .dm-faq-header {
        padding: 15px 20px !important;
        font-size: 16px !important;
    }
    .dm-faq-content-inner {
        padding: 15px 20px !important;
        font-size: 14px !important;
    }
}