/* 顶部导航栏 */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg, rgba(255, 255, 255, 0.95));
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--nav-border, var(--card-border));
    box-shadow: var(--nav-shadow, var(--shadow-md));
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--nav-brand-color, var(--primary-color));
    text-decoration: none;
}

.nav-brand i {
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    color: var(--nav-text-secondary, var(--text-secondary));
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.cta-nav-btn {
    background: var(--primary-color);
    color: var(--text-white);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.cta-nav-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 主题切换按钮 */
.theme-toggle {
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-right: var(--space-2);
}

.theme-toggle:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-toggle i {
    font-size: var(--font-size-lg);
    transition: var(--transition);
}

.theme-toggle:hover i {
    transform: rotate(180deg);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* 主要内容区域 */
.main-content {
    margin-top: 70px;
}

/* 首页区域 */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--theme-bg-primary);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    animation: float 6s ease-in-out infinite;
}

.orb-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

.orb-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 60%;
    animation-delay: 4s;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    color: var(--text-white);
}

.hero-title {
    margin-bottom: var(--space-6);
}

.title-main {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-2);
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-8);
    opacity: 0.9;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* 手机预览 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 320px;
    height: 640px;
    background: var(--gray-900);
    border-radius: 25px;
    padding: 16px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.app-preview {
    padding: var(--space-4);
    height: 100%;
    display: flex;
    flex-direction: column;
    min-height: 0; /* 确保flex子元素可以正确收缩 */
}

/* 移动端手机模拟器优化 */
@media (max-width: 768px) {
    .phone-mockup {
        width: 300px;
        height: 600px;
        padding: 12px;
        border-radius: 20px;
    }
    
    .phone-screen {
        border-radius: 16px;
    }
    
    .app-preview {
        padding: var(--space-3);
    }
}

@media (max-width: 480px) {
    .phone-mockup {
        width: 280px;
        height: 560px;
        padding: 10px;
        border-radius: 18px;
    }
    
    .phone-screen {
        border-radius: 14px;
    }
    
    .app-preview {
        padding: var(--space-2);
    }
}

@media (max-width: 360px) {
    .phone-mockup {
        width: 260px;
        height: 520px;
        padding: 8px;
        border-radius: 16px;
    }
    
    .phone-screen {
        border-radius: 12px;
    }
    
    .app-preview {
        padding: var(--space-1);
    }
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 100%);
    border-radius: 16px 16px 0 0;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
    flex-shrink: 0; /* 防止header被压缩 */
}

/* 移动端app-header优化 */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 12px;
        padding: 16px;
        border-radius: 16px 16px 0 0;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 12px;
        gap: 8px;
        border-radius: 14px 14px 0 0;
    }
}

@media (max-width: 360px) {
    .app-header {
        padding: 10px;
        gap: 6px;
        border-radius: 12px 12px 0 0;
    }
}

.app-title-section {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    color: white;
}

.app-icon {
    font-size: var(--font-size-xl);
}

/* 功能区域 */
.features-section {
    padding: var(--space-24) 0;
    background: var(--theme-bg-secondary);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

/* 预测区域 */
.prediction-section {
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.prediction-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

/* 下载区域 */
.download-section {
    padding: var(--space-16) 0;
    color: var(--color-primary);
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(120, 119, 198, 0.1) 0%, transparent 60%),
        radial-gradient(circle at 80% 80%, rgba(255, 119, 198, 0.08) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(120, 219, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

/* 开发中横幅 */
.development-banner {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-8);
    text-align: center;
    position: relative;
    z-index: 2;
}

.banner-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.banner-content i {
    font-size: var(--font-size-2xl);
    color: var(--text-white);
    animation: pulse 2s infinite;
}

.banner-content span {
    color: var(--text-white);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.banner-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    max-width: 300px;
}

.banner-progress .progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.banner-progress .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #34d399);
    border-radius: 4px;
    transition: width 1s ease-in-out;
    position: relative;
}

.banner-progress .progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

.banner-progress .progress-text {
    color: var(--text-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.download-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    width: 100%;
    position: relative;
    z-index: 2;
}

@media (max-width: 768px) {
    .download-layout {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.download-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.download-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-primary);
    margin: 0;
    opacity: 0.8;
    line-height: 1.5;
    font-weight: 400;
}

/* 统计数据 */
.download-stats {
    display: flex;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-number {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--space-1);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--gray-300);
    font-weight: 500;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
}

.checkmark {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-text {
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
}

.feature-content h4 {
    color: var(--text-white);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.01em;
}

.feature-content p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 2;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    width: 100%;
    max-width: 300px;
}

/* 下载通知 */
.download-notice {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    font-size: var(--font-size-sm);
    text-align: center;
    justify-content: center;
}

.download-notice i {
    color: #fbbf24;
    font-size: var(--font-size-lg);
}

.download-btn {
    display: flex;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 60px;
    justify-content: flex-start;
    gap: var(--space-4);
}

.download-btn:hover {
    transform: translateY(-2px);
}

.download-btn.coming-soon {
    opacity: 0.9;
    cursor: not-allowed;
}

.download-btn.coming-soon:hover {
    transform: translateY(-8px);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.btn-icon i {
    font-size: var(--font-size-lg);
    color: white;
    transition: all 0.3s ease;
}


.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    flex: 1;
}

.btn-title {
    font-weight: 600;
    font-size: var(--font-size-base);
    color: white;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.btn-subtitle {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
    line-height: 1.2;
}

/* 敬请期待覆盖层 */
.coming-soon-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(2px);
}

.download-btn.coming-soon:hover .coming-soon-overlay {
    opacity: 1;
}

.coming-soon-text {
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.5px;
}

/* 预约按钮区域 */
.pre-register-section {
    text-align: center;
    padding: var(--space-6);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.pre-register-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: linear-gradient(135deg, #10b981, #34d399);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    position: relative;
    overflow: hidden;
}

.pre-register-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 ease;
}

.pre-register-btn:hover::before {
    left: 100%;
}

.pre-register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.pre-register-btn:active {
    transform: translateY(0);
}

.pre-register-btn i {
    font-size: var(--font-size-lg);
}

.pre-register-note {
    color: var(--gray-300);
    font-size: var(--font-size-sm);
    margin-top: var(--space-3);
    margin-bottom: 0;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

/* 鸿蒙按钮样式 - 与其他按钮保持一致 */
.harmony-btn {
    background: var(--color-primary);
}

.harmony-btn:hover {
    background: var(--color-primary);
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-secondary);
    padding: var(--space-12) 0 var(--space-8) 0;
    text-align: center;
    border-top: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-color) 50%, transparent 100%);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    position: relative;
    z-index: 2;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-2);
}

.footer-brand i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

.footer-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    max-width: 600px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    position: relative;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

.footer-link:hover {
    color: var(--primary-color);
    background: rgba(30, 64, 175, 0.1);
    transform: translateY(-1px);
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.footer-link:hover::after {
    width: 100%;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    opacity: 0.8;
}

.footer-beian {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    opacity: 0.7;
    transition: var(--transition);
}

.footer-beian a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.footer-beian a:hover {
    color: var(--primary-color);
    background: rgba(30, 64, 175, 0.1);
    transform: translateY(-1px);
}

.footer-beian a::before {
    content: '🔒';
    font-size: var(--font-size-xs);
    margin-right: var(--space-1);
}

.footer-beian a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.footer-beian a:hover::after {
    width: 100%;
}

.footer-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--gray-300) 50%, transparent 100%);
    margin: var(--space-4) 0;
}

/* 页脚响应式设计 */
@media (max-width: 768px) {
    .footer {
        padding: var(--space-8) 0 var(--space-6) 0;
    }
    
    .footer-content {
        gap: var(--space-4);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-3);
        margin-bottom: var(--space-4);
    }
    
    .footer-link {
        font-size: var(--font-size-sm);
    }
    
    .footer-beian {
        flex-direction: column;
        gap: var(--space-1);
        text-align: center;
    }
    
    .footer-beian a {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .footer {
        padding: var(--space-6) 0;
    }
    
    .footer-brand {
        font-size: var(--font-size-lg);
    }
    
    .footer-description {
        font-size: var(--font-size-sm);
        margin-bottom: var(--space-3);
    }
    
    .footer-copyright {
        font-size: var(--font-size-xs);
    }
    
    .footer-beian a {
        font-size: 0.7rem;
    }
}