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

/* 全局图片响应式，避免在小屏设备发生溢出 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

a{
    word-wrap:break-word;word-spacing:normal; word-break: break-all;
}

:root {
    /* 专业配色方案 - 更高级的色调 */
    --primary-color: #ff6b35;
    --primary-dark: #e55a2b;
    --primary-light: #fff0e6;
    --secondary-color: #1a252f; /* 更深的蓝灰色 */
    --accent-color: #3498db;
    --success-color: #00b894;
    --warning-color: #fdcb6e;
    --danger-color: #ff7675;

    /* 中性色 */
    --white: #ffffff;
    --light-gray: #f8fafc; /* 冷色调灰 */
    --gray: #64748b;
    --dark-gray: #334155;
    --black: #0f172a;

    /* 渐变背景 - 更柔和 */
    --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #ff9f43 100%);
    --gradient-secondary: linear-gradient(135deg, #2c3e50 0%, #4ca1af 100%);
    --gradient-accent: #ff6b35;
    --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);

    /* 阴影效果 - 弥散阴影 */
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 12px 24px -6px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 24px 48px -12px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 32px 64px -12px rgba(15, 23, 42, 0.16);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

    /* 圆角 - 更大 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* 字体 */
    --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
}

body {
    font-family: var(--font-family);
    line-height: 1.7;
    color: var(--dark-gray);
    background-color: var(--white);
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container .price-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 88px; /* 稍微增加高度 */
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 800; /* 更粗的字重 */
    color: var(--secondary-color);
    letter-spacing: -0.5px;
}

.nav-logo i {
    font-size: var(--font-size-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 6px rgba(255, 107, 53, 0.2));
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 600;
    padding: 10px 18px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
    font-size: var(--font-size-sm);
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(255, 107, 53, 0.08);
}

.nav-link::after {
    display: none; /* 移除下划线效果，改为背景色 */
}

.nav-link:hover::after {
    width: 80%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--dark-gray);
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页横幅样式 */
.hero {
    padding: 100px 0 var(--spacing-xxl);
    background: radial-gradient(circle at top right, rgba(255, 107, 53, 0.05) 0%, transparent 40%),
    radial-gradient(circle at bottom left, rgba(52, 152, 219, 0.05) 0%, transparent 40%),
    var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    display: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr; /* 调整比例 */
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    animation: fadeInUp 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero-title {
    font-size: 4.5rem; /* 更大的标题 */
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    max-width: 90%;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* 按钮样式 - 更现代 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 18px 36px;
    border-radius: 50px; /* 全圆角 */
    text-decoration: none;
    font-weight: 700;
    font-size: var(--font-size-base);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 10px 20px -5px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -5px rgba(255, 107, 53, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--secondary-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

/* 手机模型样式 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease-out;
}

.phone-mockup {
    width: 300px;
    border-radius: 40px;
    position: relative;
    transform: rotate(-5deg);
    transition: transform 0.3s ease;
}

.phone-mockup:hover {
    transform: rotate(0deg) scale(1.05);
}


.phone-mockup img {
    width: 100%;
}


.call-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--light-gray);
    margin-bottom: var(--spacing-sm);
    transition: all 0.3s ease;
}

.call-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.call-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.call-info {
    flex: 1;
}

.call-name {
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 2px;
}

.call-phone {
    color: var(--gray);
    font-size: var(--font-size-sm);
}

.call-status {
    background: var(--success-color);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* 功能特点样式 */
.features {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray); /* 改为淡灰色背景 */
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xxl);
    position: relative;
    letter-spacing: -1px;
}

.section-title::after {
    display: none;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: left; /* 改为左对齐 */
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.6);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px; /* 方形圆角 */
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 0 var(--spacing-lg) 0; /* 左对齐 */
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: 0 10px 20px -5px rgba(255, 107, 53, 0.3);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--gray);
    line-height: 1.8;
    font-size: var(--font-size-base);
}

/* 产品演示样式 */
.demo {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.demo-info h3 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.demo-info > p {
    font-size: 1.125rem;
    color: var(--gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.demo-links {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.demo-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.02);
}

.demo-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
    border-color: rgba(255, 107, 53, 0.2);
}

.demo-item i {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(255, 107, 53, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.demo-item:hover i {
    background: var(--gradient-primary);
    color: var(--white);
}

.demo-item h4 {
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 4px;
    font-size: 1.1rem;
}

.demo-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.demo-screenshots {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    perspective: 1000px;
}

.screenshot-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 4px solid var(--white);
}

.screenshot-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px) scale(1.02);
    z-index: 10;
}

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

.screenshot-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    font-weight: 600;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.screenshot-card:hover .screenshot-overlay {
    opacity: 1;
    transform: translateY(0);
}

/* 价格方案样式 */
.pricing {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
    position: relative;
}

.pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, var(--light-gray) 0%, rgba(255, 255, 255, 0) 100%);
    z-index: 0;
}

.pricing-section {
    margin-bottom: var(--spacing-xxl);
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
}

.section-header {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
    border-left: 5px solid var(--primary-color);
    text-align: left;
}

.section-subtitle {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.section-description {
    font-size: 1.05rem;
    color: var(--gray);
    line-height: 1.6;
    margin: 0;
    font-weight: 500;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    width: 100%;
    max-width: none;
    margin: 0;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.popular-badge {
    position: absolute;
    top: 24px;
    right: -32px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 6px 40px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    transform: rotate(45deg);
    z-index: 10;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.pricing-header {
    background: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl) 0;
    text-align: center;
    border-bottom: none;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-top: var(--spacing-md);
}

.currency {
    font-size: 1.5rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    letter-spacing: -1px;
}

.period {
    font-size: var(--font-size-sm);
    color: var(--gray);
    font-weight: 500;
}

.pricing-features {
    padding: var(--spacing-xl);
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 0;
    color: var(--gray);
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--light-gray);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features i {
    color: var(--success-color);
    font-size: 1.1rem;
    background: rgba(0, 184, 148, 0.1);
    padding: 4px;
    border-radius: 50%;
}

.pricing-action {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    text-align: center;
}

.pricing-action .btn {
    width: 100%;
    padding: 20px;
    font-size: 1.1rem;
}

/* 联系我们样式 */
.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
    position: relative;
}

.contact-content {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--spacing-xl);
    max-width: 1200px;
}

.contact-content .contact-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.contact-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-color: rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

.contact-item i {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.03);
}


.contact-form #contactForm {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 18px;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all 0.3s ease;
    background: var(--light-gray);
    color: var(--secondary-color);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚样式 */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-logo i {
    font-size: var(--font-size-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-lg) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .phone-mockup {
        width: 240px;
        height: 500px;
        transform: rotate(0deg);
    }

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

    .demo-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 大屏并排展示定制：pricing 主容器在宽屏时并列 */
@media (min-width: 992px) {
    .container .price-main {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
    }
}

@media (min-width: 1200px) {
    .container .price-main {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        align-items: start;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .btn {
        padding: 14px 24px;
        font-size: var(--font-size-sm);
    }

    .phone-mockup {
        width: 200px;
        height: 420px;
    }

    .feature-card,
    .pricing-card,
    .contact-form {
        padding: var(--spacing-lg);
    }
}

/* 滚动效果 */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

/* 加载动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Page Header */
.page-header {
    padding: 120px 0 60px;
    background: radial-gradient(circle at top right, rgba(255, 107, 53, 0.05) 0%, transparent 40%),
    radial-gradient(circle at bottom left, rgba(52, 152, 219, 0.05) 0%, transparent 40%),
    var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--gray);
}

/* Timeline */
.changelog-section {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: rgba(255, 107, 53, 0.2);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--spacing-xl);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 5px; /* Aligned with date roughly */
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--white);
    border: 4px solid var(--primary-color);
    z-index: 1;
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    display: inline-block;
    background: var(--white);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--light-gray);
}

.timeline-content {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    margin-top: 10px;
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--light-gray);
}

.timeline-body {
    color: var(--dark-gray);
    line-height: 1.8;
}

.timeline-body img {
    margin: 10px 0;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.timeline-body p {
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 10px;
    }
    .timeline-item {
        padding-left: 40px;
    }
    .timeline-item::before {
        left: 1px;
        width: 16px;
        height: 16px;
        border-width: 3px;
    }
}