/* ========================================
   帮助中心和关于我们页面通用样式
   ======================================== */

/* 通用变量 */
:root {
    --help-primary: #4f6ef7;
    --help-primary-light: #6b8cff;
    --help-bg: #f8fafc;
    --help-card-bg: #ffffff;
    --help-text: #1e293b;
    --help-text-secondary: #64748b;
    --help-border: rgba(0, 0, 0, 0.06);
    --help-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --help-radius: 16px;
    --help-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Audio 产品主题 - 橙色系 */
[data-theme="audio"] {
    --help-primary: #f97316;
    --help-primary-light: #fdba74;
    --help-gradient: linear-gradient(135deg, #f97316, #ef4444);
}

/* PDF 产品主题 - 红色系 */
[data-theme="pdf"] {
    --help-primary: #dc2626;
    --help-primary-light: #fca5a5;
    --help-gradient: linear-gradient(135deg, #dc2626, #b91c1c);
}

/* Video 产品主题 - 紫色系 */
[data-theme="video"] {
    --help-primary: #a855f7;
    --help-primary-light: #c084fc;
    --help-gradient: linear-gradient(135deg, #a855f7, #9333ea);
}

/* Images 产品主题 - 蓝色系 */
[data-theme="images"] {
    --help-primary: #3b82f6;
    --help-primary-light: #60a5fa;
    --help-gradient: linear-gradient(135deg, #3b82f6, #2563eb);
}

/* OCR 产品主题 - 绿色系 */
[data-theme="ocr"] {
    --help-primary: #10b981;
    --help-primary-light: #34d399;
    --help-gradient: linear-gradient(135deg, #10b981, #059669);
}

/* CAD 产品主题 - 蓝色系 */
[data-theme="cad"] {
    --help-primary: #3b82f6;
    --help-primary-light: #60a5fa;
    --help-gradient: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

/* Watermark 产品主题 - 粉色系 */
[data-theme="watermark"] {
    --help-primary: #ec4899;
    --help-primary-light: #f472b6;
    --help-gradient: linear-gradient(135deg, #ec4899, #db2777);
}

/* Metadata 产品主题 - 靛蓝系 */
[data-theme="metadata"] {
    --help-primary: #6366f1;
    --help-primary-light: #818cf8;
    --help-gradient: linear-gradient(135deg, #6366f1, #4f46e5);
}

/* Compress 产品主题 - 橙色系 */
[data-theme="compress"] {
    --help-primary: #f59e0b;
    --help-primary-light: #fbbf24;
    --help-gradient: linear-gradient(135deg, #f59e0b, #d97706);
}

/* Rename 产品主题 - 青色系 */
[data-theme="rename"] {
    --help-primary: #14b8a6;
    --help-primary-light: #2dd4bf;
    --help-gradient: linear-gradient(135deg, #14b8a6, #0d9488);
}

/* Backup 产品主题 - 天蓝色系 */
[data-theme="backup"] {
    --help-primary: #0ea5e9;
    --help-primary-light: #38bdf8;
    --help-gradient: linear-gradient(135deg, #0ea5e9, #0284c7);
}

/* Enlarge 产品主题 - 紫色系 */
[data-theme="enlarge"] {
    --help-primary: #d946ef;
    --help-primary-light: #e879f9;
    --help-gradient: linear-gradient(135deg, #d946ef, #c026d3);
}

/* DataRecovery 产品主题 - 绿色系 */
[data-theme="datarecovery"] {
    --help-primary: #10b981;
    --help-primary-light: #34d399;
    --help-gradient: linear-gradient(135deg, #10b981, #059669);
}

/* ScreenRecorder 产品主题 - 紫红色系 */
[data-theme="screenrecorder"] {
    --help-primary: #ec4899;
    --help-primary-light: #f472b6;
    --help-gradient: linear-gradient(135deg, #ec4899, #8b5cf6);
}

/* ========================================
   帮助中心页面样式
   ======================================== */

.help-page-wrapper {
    min-height: 100vh;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.help-page-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: radial-gradient(ellipse at 50% 0%, rgba(79, 110, 247, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.help-hero {
    text-align: center;
    padding: 60px 20px 40px;
    position: relative;
    z-index: 1;
}

.help-hero-title {
    font-size: 3rem;
    font-weight: 800;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    animation: fadeInDown 0.8s ease-out;
}

.help-hero-subtitle {
    font-size: 1.125rem;
    color: var(--help-text-secondary);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.help-search-container {
    max-width: 600px;
    margin: 0 auto 60px;
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.help-search-box {
    position: relative;
    background: white;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    transition: var(--help-transition);
}

.help-search-box:focus-within {
    box-shadow: 0 8px 30px rgba(79, 110, 247, 0.15), 0 0 0 2px var(--help-primary);
    transform: translateY(-2px);
}

.help-search-input {
    width: 100%;
    padding: 20px 60px 20px 30px;
    border: none;
    outline: none;
    font-size: 1rem;
    background: transparent;
    color: var(--help-text);
}

.help-search-input::placeholder {
    color: #94a3b8;
}

.help-search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--help-transition);
}

.help-search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 4px 15px rgba(79, 110, 247, 0.3);
}

.help-main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px 80px;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    position: relative;
    z-index: 1;
}

/* 左侧分类导航 */
.help-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
    animation: fadeInLeft 0.8s ease-out 0.6s both;
}

.help-category-card {
    background: white;
    border-radius: var(--help-radius);
    box-shadow: var(--help-shadow);
    overflow: hidden;
    border: 1px solid var(--help-border);
}

.help-category-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--help-border);
}

.help-category-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--help-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.help-category-title i {
    color: var(--help-primary);
    font-size: 1.25rem;
}

.help-category-list {
    padding: 12px 0;
}

.help-category-item {
    display: block;
    padding: 14px 24px;
    color: var(--help-text-secondary);
    text-decoration: none;
    transition: var(--help-transition);
    position: relative;
    font-weight: 500;
}

.help-category-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--help-primary);
    transform: scaleY(0);
    transition: var(--help-transition);
}

.help-category-item:hover {
    color: var(--help-primary);
    background: rgba(79, 110, 247, 0.04);
    padding-left: 28px;
}

.help-category-item:hover::before {
    transform: scaleY(1);
}

.help-category-item.active {
    color: var(--help-primary);
    background: rgba(79, 110, 247, 0.08);
    font-weight: 600;
}

.help-category-item.active::before {
    transform: scaleY(1);
}

/* 右侧文章列表 */
.help-content {
    animation: fadeInRight 0.8s ease-out 0.6s both;
}

.help-article-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.help-article-card {
    background: white;
    border-radius: var(--help-radius);
    padding: 28px;
    box-shadow: var(--help-shadow);
    border: 1px solid var(--help-border);
    transition: var(--help-transition);
    cursor: pointer;
    text-decoration: none;
    display: block;
}

.help-article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    border-color: var(--help-primary);
}

.help-article-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--help-text);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.help-article-title::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--help-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.help-article-excerpt {
    color: var(--help-text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.help-article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--help-border);
    font-size: 0.875rem;
    color: #94a3b8;
}

.help-article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.help-empty-state {
    text-align: center;
    padding: 80px 20px;
    background: white;
    border-radius: var(--help-radius);
    box-shadow: var(--help-shadow);
}

.help-empty-icon {
    font-size: 4rem;
    color: #cbd5e1;
    margin-bottom: 20px;
}

.help-empty-text {
    font-size: 1.125rem;
    color: var(--help-text-secondary);
}

/* ========================================
   关于我们页面样式
   ======================================== */

.about-page-wrapper {
    min-height: 100vh;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.about-page-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 500px;
    background: radial-gradient(ellipse at 50% 0%, rgba(79, 110, 247, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.about-hero {
    text-align: center;
    padding: 80px 20px 60px;
    position: relative;
    z-index: 1;
}

.about-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(79, 110, 247, 0.08);
    border: 1px solid rgba(79, 110, 247, 0.15);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--help-primary);
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease-out;
}

.about-hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.about-hero-subtitle {
    font-size: 1.25rem;
    color: var(--help-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 80px;
    position: relative;
    z-index: 1;
}

.about-section {
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out both;
}

.about-section:nth-child(1) { animation-delay: 0.6s; }
.about-section:nth-child(2) { animation-delay: 0.8s; }
.about-section:nth-child(3) { animation-delay: 1s; }

.about-card {
    background: white;
    border-radius: var(--help-radius);
    padding: 48px;
    box-shadow: var(--help-shadow);
    border: 1px solid var(--help-border);
    transition: var(--help-transition);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.about-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.about-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.about-card-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--help-text);
}

.about-card-subtitle {
    font-size: 0.875rem;
    color: var(--help-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about-text {
    color: var(--help-text-secondary);
    line-height: 1.8;
    font-size: 1.0625rem;
    margin-bottom: 20px;
}

.about-text:last-child {
    margin-bottom: 0;
}

.about-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.about-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: var(--help-transition);
}

.about-image:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

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

/* 特色卡片网格 */
.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.about-feature-card {
    background: white;
    border-radius: var(--help-radius);
    padding: 32px;
    box-shadow: var(--help-shadow);
    border: 1px solid var(--help-border);
    text-align: center;
    transition: var(--help-transition);
}

.about-feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
    border-color: var(--help-primary);
}

.about-feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(79, 110, 247, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.75rem;
    color: var(--help-primary);
}

.about-feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--help-text);
    margin-bottom: 12px;
}

.about-feature-desc {
    color: var(--help-text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ========================================
   动画效果
   ======================================== */

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
    .help-main-content {
        grid-template-columns: 1fr;
    }

    .help-sidebar {
        position: static;
    }

    .help-hero-title {
        font-size: 2.5rem;
    }

    .about-hero-title {
        font-size: 2.75rem;
    }
}

@media (max-width: 768px) {
    .help-page-wrapper,
    .about-page-wrapper {
        padding-top: 70px;
    }

    .help-hero {
        padding: 40px 20px 30px;
    }

    .help-hero-title {
        font-size: 2rem;
    }

    .help-hero-subtitle {
        font-size: 1rem;
    }

    .help-search-container {
        margin-bottom: 40px;
    }

    .help-search-input {
        padding: 16px 60px 16px 20px;
        font-size: 0.9375rem;
    }

    .help-main-content {
        padding: 0 16px 60px;
        gap: 20px;
    }

    .help-category-header {
        padding: 20px 20px 12px;
    }

    .help-category-item {
        padding: 12px 20px;
    }

    .help-article-card {
        padding: 20px;
    }

    .help-article-title {
        font-size: 1.125rem;
    }

    .about-hero {
        padding: 60px 20px 40px;
    }

    .about-hero-title {
        font-size: 2.25rem;
    }

    .about-hero-subtitle {
        font-size: 1.0625rem;
    }

    .about-content {
        padding: 0 16px 60px;
    }

    .about-card {
        padding: 28px 24px;
    }

    .about-card-title {
        font-size: 1.5rem;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .about-images {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .help-hero-title {
        font-size: 1.75rem;
    }

    .help-search-input {
        padding: 14px 55px 14px 18px;
    }

    .help-search-btn {
        width: 40px;
        height: 40px;
    }

    .help-article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .about-hero-title {
        font-size: 2rem;
    }

    .about-card {
        padding: 24px 20px;
    }

    .about-card-header {
        flex-direction: column;
        text-align: center;
    }
}

/* ========================================
   分页样式优化
   ======================================== */

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--help-border);
    background: white;
    color: var(--help-text-secondary);
    font-weight: 500;
    transition: var(--help-transition);
}

.page-link:hover {
    background: rgba(79, 110, 247, 0.08);
    border-color: var(--help-primary);
    color: var(--help-primary);
}

.page-item.active .page-link {
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    border-color: transparent;
    color: white;
}

.page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   关于页面新增样式
   ======================================== */

.about-product-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 32px;
}

.about-product-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(79, 110, 247, 0.04);
    border-radius: 12px;
    border: 1px solid rgba(79, 110, 247, 0.08);
    transition: var(--help-transition);
}

.about-product-feature:hover {
    background: rgba(79, 110, 247, 0.08);
    border-color: var(--help-primary);
    transform: translateX(4px);
}

.about-product-feature i {
    color: var(--help-primary);
    font-size: 1.125rem;
    flex-shrink: 0;
}

.about-product-feature span {
    color: var(--help-text);
    font-size: 0.9375rem;
    font-weight: 500;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 20px;
}

.about-stat-item {
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(135deg, rgba(79, 110, 247, 0.04), rgba(79, 110, 247, 0.02));
    border-radius: 16px;
    border: 1px solid rgba(79, 110, 247, 0.08);
    transition: var(--help-transition);
}

.about-stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(79, 110, 247, 0.12);
    border-color: var(--help-primary);
}

.about-stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    line-height: 1.2;
}

.about-stat-label {
    font-size: 0.9375rem;
    color: var(--help-text-secondary);
    font-weight: 500;
}

.about-timeline {
    position: relative;
    padding-left: 40px;
    margin-top: 20px;
}

.about-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--help-primary), rgba(79, 110, 247, 0.2));
}

.about-timeline-item {
    position: relative;
    padding-bottom: 32px;
    transition: var(--help-transition);
}

.about-timeline-item:last-child {
    padding-bottom: 0;
}

.about-timeline-item:hover .about-timeline-dot {
    transform: scale(1.3);
    box-shadow: 0 0 0 8px rgba(79, 110, 247, 0.15);
}

.about-timeline-dot {
    position: absolute;
    left: -34px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    border: 3px solid white;
    box-shadow: 0 2px 8px rgba(79, 110, 247, 0.3);
    transition: var(--help-transition);
}

.about-timeline-content {
    background: rgba(79, 110, 247, 0.02);
    border-radius: 12px;
    padding: 20px 24px;
    border: 1px solid rgba(79, 110, 247, 0.08);
    transition: var(--help-transition);
}

.about-timeline-item:hover .about-timeline-content {
    background: rgba(79, 110, 247, 0.04);
    border-color: rgba(79, 110, 247, 0.15);
}

.about-timeline-year {
    display: inline-block;
    padding: 4px 12px;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    color: white;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.about-timeline-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--help-text);
    margin-bottom: 8px;
}

.about-timeline-desc {
    font-size: 0.9375rem;
    color: var(--help-text-secondary);
    line-height: 1.6;
}

.about-contact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.about-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: rgba(79, 110, 247, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(79, 110, 247, 0.08);
    transition: var(--help-transition);
}

.about-contact-item:hover {
    background: rgba(79, 110, 247, 0.04);
    border-color: var(--help-primary);
    transform: translateY(-2px);
}

.about-contact-item > i {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--help-gradient, linear-gradient(135deg, #4f6ef7, #3b5de7));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.about-contact-info {
    flex: 1;
}

.about-contact-label {
    font-size: 0.8125rem;
    color: var(--help-text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-contact-value {
    font-size: 0.9375rem;
    color: var(--help-text);
    font-weight: 500;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-stat-number {
        font-size: 2rem;
    }

    .about-timeline {
        padding-left: 32px;
    }

    .about-timeline-dot {
        left: -26px;
        width: 14px;
        height: 14px;
    }

    .about-timeline-content {
        padding: 16px 20px;
    }

    .about-contact {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .about-stat-item {
        padding: 24px 16px;
    }

    .about-stat-number {
        font-size: 1.75rem;
    }

    .about-product-features {
        grid-template-columns: 1fr;
    }
}