/* HealiPet Website Styles */
:root {
    --color-primary: #0052D9;
    --color-primary-dark: #0039A6;
    --color-secondary: #00D4FF;
    --color-text: #1a1a1a;
    --color-text-light: #666;
    --color-bg: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-border: #e0e0e0;
    --shadow: 0 4px 12px rgba(0,0,0,.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,.12);
    --radius: 8px;
    --radius-lg: 16px;
    --duration: .2s;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--color-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: color var(--duration) ease-out;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.lang-selector {
    display: flex;
    gap: 0.5rem;
    padding-left: 1rem;
    border-left: 1px solid var(--color-border);
}

.lang-selector a {
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    transition: background var(--duration) ease-out;
}

.lang-selector a:hover,
.lang-selector .lang-active {
    background: var(--color-primary);
    color: white;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: 4rem 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--duration) ease-out;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: white;
    color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--color-primary);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* 功能特性 */
.features {
    padding: 5rem 0;
    background: var(--color-bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--color-text);
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform var(--duration) ease-out, box-shadow var(--duration) ease-out;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* 技术栈 */
.tech {
    padding: 5rem 0;
}

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

.tech-item {
    padding: 2rem;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: background var(--duration) ease-out;
}

.tech-item:hover {
    background: white;
    box-shadow: var(--shadow);
}

.tech-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.tech-item p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* CTA 区域 */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* 页脚 */
.footer {
    background: var(--color-text);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--color-secondary);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .lang-selector {
        border-left: none;
        padding-left: 0;
    }

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

/* 页面内容样式（用于支持页面和隐私政策页面） */
.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.125rem;
}

.page-section {
    margin-bottom: 2.5rem;
}

.page-section h2 {
    font-size: 1.75rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.page-section h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.page-section p,
.page-section li {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.page-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.page-section ul li {
    margin-bottom: 0.5rem;
}

.page-back-link {
    display: inline-block;
    margin-top: 2rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--duration) ease-out;
}

.page-back-link:hover {
    color: var(--color-primary-dark);
}