/* 优化比例 - 更优雅的弹性适配 */
:root {
    /* 保守的响应式单位 */
    --text-xs: 0.75rem;   /* 12px */
    --text-sm: 0.875rem;  /* 14px */
    --text-base: 1rem;    /* 16px */
    --text-lg: 1.125rem;  /* 18px */
    --text-xl: 1.25rem;   /* 20px */
    --text-2xl: 1.5rem;   /* 24px */
    --text-3xl: 2rem;     /* 32px */
    --text-4xl: 2.5rem;   /* 40px */
    --text-5xl: 3rem;     /* 48px */
    
    /* 保守的间距 */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 0.75rem;  /* 12px */
    --space-md: 1rem;     /* 16px */
    --space-lg: 1.5rem;   /* 24px */
    --space-xl: 2rem;     /* 32px */
    --space-2xl: 3rem;    /* 48px */
    
    /* 颜色系统 */
    --primary: #F97316;
    --secondary: #FBBF24;
    --accent: #F59E0B;
    --dark: #000000;
    --light: #f8fafc;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: var(--light);
    font-size: var(--text-base);
}

/* 弹性容器 - 保守缩放 */
.container {
    width: 100%;
    max-width: min(1200px, 92%);
    margin: 0 auto;
    padding-left: max(1rem, 3vw);
    padding-right: max(1rem, 3vw);
}

/* 在大屏幕上稍微放宽 */
@media (min-width: 1536px) {
    .container {
        max-width: 1400px;
    }
}

/* 导航栏 - 保持紧凑 */
.navbar {
    background: var(--dark);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
}

.logo-img {
    height: 32px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover .logo-img {
    transform: scale(1.1);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #E5E7EB;
    font-weight: 500;
    transition: color 0.3s;
    padding: var(--space-xs) 0;
    position: relative;
    font-size: var(--text-base);
    white-space: nowrap;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.contact-btn {
    background: var(--primary);
    color: var(--white) !important;
    padding: var(--space-sm) var(--space-xl) !important;
    border-radius: 8px;
    font-weight: 700 !important;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--text-xl);
    color: var(--white);
    cursor: pointer;
}

/* 英雄区域 - 优雅缩放 */
.hero {
    padding: 8rem 0 5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem); /* 保守缩放 */
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.highlight {
    color: #FFFB00;
    font-weight: 900;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem); /* 保守缩放 */
    opacity: 0.95;
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    color: var(--white);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: var(--text-base);
}

.primary-btn {
    background: var(--dark);
    color: var(--white);
    border: 2px solid var(--dark);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    background: #222222;
}

.secondary-btn {
    background: linear-gradient(135deg, var(--primary), #FB923C);
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.secondary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(249, 115, 22, 0.4);
    background: linear-gradient(135deg, #EA580C, var(--primary));
}

.app-coming {
    color: rgba(255,255,255,0.9);
    font-size: var(--text-sm);
    font-style: italic;
}

/* 手机模型 - 固定比例 */
.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    background: var(--dark);
    border-radius: 40px;
    padding: 15px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.3);
    margin: 0 auto;
    transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: floatPhone 6s ease-in-out infinite, 
               pulseGlow 4s ease-in-out infinite;
    border: 2px solid rgba(255,255,255,0.1);
}

@keyframes pulseGlow {
    0%, 100% { 
        box-shadow: 0 25px 50px rgba(0,0,0,0.3),
                    0 0 20px rgba(249, 115, 22, 0.1);
    }
    50% { 
        box-shadow: 0 25px 50px rgba(0,0,0,0.3),
                    0 0 40px rgba(249, 115, 22, 0.3);
    }
}

@keyframes floatPhone {
    0%, 100% { 
        transform: perspective(1000px) rotateY(-12deg) rotateX(8deg) translateY(0);
    }
    50% { 
        transform: perspective(1000px) rotateY(-2deg) rotateX(4deg) translateY(-20px);
    }
}

.phone-mockup:hover {
    animation-play-state: paused;
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.08);
    box-shadow: 0 40px 80px rgba(249, 115, 22, 0.3); /* 添加橙色光晕 */
    border-color: rgba(255, 255, 255, 0.3); /* 边框更亮 */
}

/* 在大屏幕上稍微放大手机 */
@media (min-width: 1536px) {
    .phone-mockup {
        width: 320px;
        height: 640px;
    }
}

.phone-screen {
    background: #1F2937;
    height: 100%;
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.screenshot-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    border-radius: 30px;
}

.app-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
    border: 1px solid rgba(255,255,255,0.1);
}

.phone-mockup:hover .app-screenshot {
    transform: scale(1.02);
}

.status-bar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 10;
}

.screenshot-hint {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(249, 115, 22, 0.9);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    backdrop-filter: blur(10px);
    animation: pulseHint 2s infinite;
    z-index: 10;
}

/* 功能区域 - 保持紧凑 */
.features {
    padding: 5rem 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: var(--text-3xl);
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-xl);
}

.feature-card {
    background: #f8fafc;
    padding: var(--space-xl);
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    color: var(--white);
    font-size: 1.8rem;
}

.feature-card h3 {
    color: #1e293b;
    margin-bottom: var(--space-md);
    font-size: var(--text-lg);
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* 在大屏幕上增加功能卡片列数 */
@media (min-width: 1280px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 关于我们 */
.about {
    padding: 5rem 0;
    background: #f1f5f9;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.company-info h3 {
    font-size: var(--text-3xl);
    color: #1e293b;
    margin-bottom: var(--space-lg);
}

.company-info p {
    color: #475569;
    margin-bottom: var(--space-xl);
    font-size: var(--text-base);
    line-height: 1.8;
}

.company-details {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: 12px;
    display: inline-block;
    text-align: left;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.company-details p {
    margin: var(--space-sm) 0;
    color: #475569;
    font-size: var(--text-base);
}

.company-details i {
    color: var(--primary);
    margin-right: var(--space-sm);
    width: 20px;
}

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

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-xl);
    color: var(--white);
}

.footer-logo-img {
    height: 36px;
    width: auto;
    transition: all 0.3s ease;
}

.footer-logo:hover .footer-logo-img {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 0 8px rgba(249, 115, 22, 0.6));
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
    padding: var(--space-xs);
    border-radius: 8px;
    font-size: var(--text-base);
}

.footer-links a:hover {
    color: var(--accent);
    background: rgba(249, 115, 22, 0.1);
}

.footer-contact p {
    color: #94a3b8;
    margin: var(--space-sm) 0;
    font-size: var(--text-base);
}

.footer-note {
    font-size: var(--text-sm);
    color: #64748b !important;
    margin-top: var(--space-lg) !important;
    margin-bottom: var(--space-md) !important; /* 添加上下边距 */
    font-style: italic;
    border-top: 1px solid #374151;
    padding-top: var(--space-lg);
    max-width: 600px;
    margin-left: auto !important;  /* 确保居中 */
    margin-right: auto !important; /* 确保居中 */
    text-align: center !important; /* 文字居中 */
    display: block; /* 确保是块级元素 */
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .phone-mockup {
        transform: none;
        animation: floatPhoneMobile 6s ease-in-out infinite;
    }
    
    @keyframes floatPhoneMobile {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-10px); }
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .container {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
    
    .feature-card {
        padding: var(--space-lg);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-md);
    }
}