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

:root {
    /* 主题色 */
    --primary-color: #00f5ff;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #00f5ff 0%, #7c3aed 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);

    /* 背景色 */
    --bg-dark: #0a0a0f;
    --bg-dark-secondary: #14141f;
    --bg-card: #1a1a2e;
    --bg-card-hover: #242438;

    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: #b8b8d1;
    --text-muted: #6b6b8c;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 245, 255, 0.3);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* 边框圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) 0;
}

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

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-highlight {
    color: var(--primary-color);
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: rgba(0, 245, 255, 0.1);
}

.btn-contact {
    background: var(--gradient-2);
    color: var(--text-primary) !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

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

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
}

.gradient-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
}

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-2);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: rgba(0, 245, 255, 0.1);
    transform: translateY(-2px);
}

/* 浮动卡片 */
.hero-image {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 40%;
    right: 10%;
    animation-delay: 2s;
}

.card-3 {
    bottom: 20%;
    left: 30%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.card-text {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 通用Section样式 */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

/* 特性展示 */
.features {
    background: var(--bg-dark-secondary);
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

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

/* 产品展示 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.product-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.product-image {
    height: 200px;
    background: var(--gradient-1);
    position: relative;
    overflow: hidden;
}

.product-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon {
    font-size: 4rem;
}

.product-content {
    padding: var(--spacing-md);
}

.product-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.product-content > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.product-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.product-features li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.btn-learn-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.btn-learn-more:hover {
    color: var(--text-primary);
}

/* 数据统计 */
.stats {
    background: var(--bg-dark-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* 解决方案 */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-md);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.solution-icon {
    font-size: 2rem;
}

.solution-card h3 {
    font-size: 1.25rem;
}

.solution-card p {
    color: var(--text-secondary);
}

/* 社交业务展示 */
.social-app {
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.social-app::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 245, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.app-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.app-info {
    padding: var(--spacing-md);
    text-align: center;
    max-width: 800px;
}

.app-logo {
    margin: 0 auto var(--spacing-md);
    display: flex;
    justify-content: center;
}

.logo-placeholder {
    width: 120px;
    height: 120px;
    background: var(--gradient-2);
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.logo-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.app-icon {
    font-size: 4rem;
    position: relative;
    z-index: 1;
}

.app-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 1;
    border-radius: 20px;
}

.app-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.app-features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.app-feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    color: var(--text-secondary);
}

.app-feature-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.feature-icon {
    font-size: 1.25rem;
}

.app-download-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    min-width: 180px;
}

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

.appstore-btn:hover {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.2) 0%, rgba(0, 122, 255, 0.05) 100%);
}

.android-btn:hover {
    background: linear-gradient(135deg, rgba(61, 220, 132, 0.2) 0%, rgba(61, 220, 132, 0.05) 100%);
}

.download-btn .btn-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-btn .btn-icon svg {
    width: 28px;
    height: 28px;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-subtitle {
    font-size: 0.625rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.app-stats {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
}

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

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.stat-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 手机模型展示 */
.app-screenshots {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    position: relative;
    perspective: 1000px;
}

.phone-mockup {
    position: relative;
    transition: var(--transition);
}

.mockup-1 {
    transform: translateY(20px) scale(0.9);
    z-index: 1;
    animation: float 6s ease-in-out infinite;
}

.mockup-2 {
    transform: scale(1.05);
    z-index: 2;
    animation: float 6s ease-in-out infinite 2s;
}

.mockup-3 {
    transform: translateY(20px) scale(0.9);
    z-index: 1;
    animation: float 6s ease-in-out infinite 4s;
}

.phone-frame {
    width: 180px;
    height: 360px;
    background: #1a1a2e;
    border-radius: 30px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6),
                inset 0 0 0 2px rgba(255, 255, 255, 0.1);
    position: relative;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 20px;
    background: #0a0a0f;
    border-radius: 0 0 15px 15px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    border-radius: 22px;
    overflow: hidden;
    position: relative;
}

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

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    padding: var(--spacing-sm);
}

.placeholder-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* 社交动态样式 */
.placeholder-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.placeholder-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 50%;
}

.placeholder-name {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.placeholder-image {
    width: 100%;
    height: 120px;
    background: var(--gradient-2);
    border-radius: var(--radius-sm);
}

.placeholder-text {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.line {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    animation: pulse 2s ease-in-out infinite;
}

.line.short {
    width: 80%;
}

.line.shorter {
    width: 50%;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
}

/* 聊天列表样式 */
.chat-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
}

.chat-avatar {
    width: 45px;
    height: 45px;
    background: var(--gradient-1);
    border-radius: 50%;
    flex-shrink: 0;
}

.chat-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* 个人资料样式 */
.profile-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.profile-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: 50%;
}

.profile-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    width: 100%;
}

.profile-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.25rem;
}

.grid-item {
    aspect-ratio: 1;
    background: var(--gradient-3);
    border-radius: 4px;
}

/* 关于我们 */
.about {
    background: var(--bg-dark-secondary);
}

.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    text-align: center;
    width: 100%;
}

.about-text .section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
    text-align: center;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    width: 100%;
}

.value-item {
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.value-item h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.value-item p {
    font-size: 0.875rem;
    margin: 0;
}

/* 科技圆环 */
.about-image {
    margin-top: var(--spacing-lg);
    width: 100%;
}

.tech-circle {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}
/* 
.circle-layer {
    position: absolute;
    border: 2px solid;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: rotate 10s linear infinite;
}

.layer-1 {
    width: 280px;
    height: 280px;
    border-color: rgba(0, 245, 255, 0.3);
    animation-duration: 10s;
}

.layer-2 {
    width: 220px;
    height: 220px;
    border-color: rgba(124, 58, 237, 0.3);
    animation-duration: 15s;
    animation-direction: reverse;
}

.layer-3 {
    width: 160px;
    height: 160px;
    border-color: rgba(245, 158, 11, 0.3);
    animation-duration: 20s;
} */
/* 
@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
} */

/* .circle-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    box-shadow: var(--shadow-glow);
} */

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.contact-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-color);
}

.contact-icon {
    font-size: 2rem;
}

.contact-item h4 {
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    background: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 245, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--bg-dark-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: var(--text-secondary);
}

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

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

.footer-section ul a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

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

/* 移动端触摸优化 */
.touch-device * {
    cursor: default !important;
}

.touch-device a,
.touch-device button {
    cursor: pointer !important;
}

/* 移动端优化：禁用某些动画以提升性能 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 响应式设计 */

/* 平板和中等屏幕 (768px - 968px) */
@media (max-width: 968px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    /* 导航栏 */
    .logo-text {
        font-size: 1.2rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: var(--spacing-md);
        backdrop-filter: blur(10px);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

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

    .nav-menu li {
        margin: var(--spacing-sm) 0;
    }

    .hamburger {
        display: flex;
    }

    /* Hero区域 */
    .hero {
        min-height: 80vh;
        padding-top: 100px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-image {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
        text-align: center;
    }

    .hero-subtitle {
        text-align: center;
        margin: 0 auto var(--spacing-md);
    }

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

    /* 特性网格 */
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    /* 产品网格 */
    .products-grid {
        grid-template-columns: 1fr;
    }

    /* 解决方案网格 */
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 统计数据 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 关于我们 */
    .about-content {
        max-width: 100%;
    }

    .about-values {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-circle {
        width: 250px;
        height: 250px;
    }

    .layer-1 {
        width: 230px;
        height: 230px;
    }

    .layer-2 {
        width: 180px;
        height: 180px;
    }

    .layer-3 {
        width: 130px;
        height: 130px;
    }

    /* 联系我们 */
    .contact-content {
        grid-template-columns: 1fr;
    }

    /* 社交平台 */
    .app-showcase {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .app-info {
        max-width: 100%;
    }

    .app-screenshots {
        margin-bottom: var(--spacing-md);
    }

    .phone-frame {
        width: 160px;
        height: 320px;
    }

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

    /* 页脚 */
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

/* 手机端 (最大 640px) */
@media (max-width: 640px) {
    :root {
        --spacing-xs: 0.5rem;   /* 8px */
        --spacing-sm: 1rem;     /* 16px */
        --spacing-md: 1.5rem;   /* 24px */
        --spacing-lg: 2rem;     /* 32px - 缩小间距 */
        --spacing-xl: 2.5rem;   /* 40px - 缩小间距 */
    }

    body {
        font-size: 14px;
        text-align: center;
    }

    .container {
        padding: 0 1.25rem;
    }

    /* 导航栏 */
    .navbar {
        padding: 0.75rem 0;
    }

    .logo-text {
        font-size: 1rem;
    }

    .nav-menu {
        top: 60px;
    }

    /* 隐藏导航栏中被隐藏模块的链接 */
    .nav-menu a[href="#products"],
    .nav-menu a[href="#solutions"],
    .nav-menu a[href="#contact"] {
        display: none !important;
    }

    .nav-menu li:has(a[href="#products"]),
    .nav-menu li:has(a[href="#solutions"]),
    .nav-menu li:has(a[href="#contact"]) {
        display: none !important;
    }

    /* Hero区域 */
    .hero {
        min-height: auto;
        padding-top: 80px;
        padding-bottom: var(--spacing-md);
    }

    .hero .container {
        gap: var(--spacing-md);
    }

    .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }

    .hero-subtitle {
        font-size: 1rem;
        max-width: 100%;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }

    .hero-buttons {
        display: none !important;
    }

    .btn {
        width: auto;
        max-width: 280px;
        min-width: 200px;
        justify-content: center;
        padding: 0.875rem 2rem;
    }

    /* 手机端隐藏部分模块 */
    .features,
    .products,
    .stats,
    .solutions,
    .contact {
        display: none !important;
    }

    /* 只保留Hero、社交平台、关于我们 */
    .hero,
    .social-app,
    .about {
        display: block;
    }

    /* Section标题 */
    section {
        padding: var(--spacing-lg) 0;
        text-align: center;
    }

    .section-title {
        font-size: 1.75rem;
        text-align: center;
        margin-bottom: var(--spacing-sm);
    }

    .section-subtitle {
        font-size: 1rem;
        text-align: center;
        margin-bottom: 0;
    }

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

    /* 特性展示 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .feature-card {
        padding: var(--spacing-sm);
        text-align: center;
    }

    .feature-icon {
        width: 50px;
        height: 50px;
        margin: 0 auto;
    }

    .feature-icon svg {
        width: 24px;
        height: 24px;
    }

    .feature-card h3 {
        font-size: 1.125rem;
        text-align: center;
    }

    .feature-card p {
        font-size: 0.875rem;
        text-align: center;
    }

    /* 产品展示 */
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .product-card {
        margin-bottom: var(--spacing-sm);
        text-align: center;
    }

    .product-content {
        padding: var(--spacing-sm);
        text-align: center;
    }

    .product-content h3 {
        font-size: 1.25rem;
        text-align: center;
    }

    .product-content > p {
        text-align: center;
    }

    .product-features {
        text-align: left;
        display: inline-block;
        max-width: 280px;
    }

    /* 统计数据 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

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

    .stat-label {
        font-size: 0.875rem;
    }

    /* 解决方案 */
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .solution-card {
        padding: var(--spacing-sm);
        text-align: center;
    }

    .solution-header {
        justify-content: center;
    }

    .solution-icon {
        font-size: 1.5rem;
    }

    .solution-card h3 {
        font-size: 1.125rem;
        text-align: center;
    }

    .solution-card p {
        text-align: center;
    }

    /* 社交平台 */
    .social-app {
        padding: var(--spacing-lg) 0;
    }

    /* 隐藏社交平台的标题 */
    .social-app .section-header {
        display: none !important;
    }

    .app-showcase {
        gap: var(--spacing-md);
    }

    .app-info {
        padding: 0;
    }

    .app-logo {
        margin-bottom: var(--spacing-md);
    }

    .logo-placeholder {
        width: 100px;
        height: 100px;
        border-radius: 22px;
    }

    .app-icon {
        font-size: 3rem;
    }

    .app-logo-img {
        border-radius: 18px;
    }

    .app-name {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }

    .app-description {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-sm);
    }

    .app-features-list {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        margin-bottom: var(--spacing-md);
    }

    .app-feature-item {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }

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

    .app-download-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
        width: 100%;
        align-items: center;
        margin-bottom: var(--spacing-md);
    }

    .download-btn {
        width: auto;
        max-width: 280px;
        min-width: 220px;
        padding: 0.875rem 1.5rem;
    }

    .btn-subtitle {
        font-size: 0.625rem;
    }

    .btn-title {
        font-size: 1rem;
    }

    .app-stats {
        flex-direction: row;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .stat-desc {
        font-size: 0.75rem;
    }

    /* 手机模型 */
    .app-screenshots {
        gap: var(--spacing-sm);
        padding: var(--spacing-md) 0;
        margin-top: var(--spacing-md);
    }

    .phone-frame {
        width: 100px;
        height: 200px;
        border-radius: 18px;
        padding: 6px;
    }

    .phone-notch {
        width: 50px;
        height: 6px;
        border-radius: 0 0 10px 10px;
        top: 6px;
    }

    .phone-screen {
        border-radius: 14px;
    }

    .screenshot-placeholder {
        padding: 0.5rem;
    }

    /* 关于我们 */
    .about {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-md);
    }

    .about-content {
        gap: var(--spacing-md);
    }

    .about-text {
        text-align: center;
        padding: 0 var(--spacing-sm);
    }

    .about-text .section-title {
        text-align: center;
        margin-bottom: var(--spacing-sm);
    }

    .about-text p {
        font-size: 0.875rem;
        text-align: center;
        line-height: 1.7;
        margin-bottom: var(--spacing-sm);
    }

    .about-values {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
    }

    .value-item {
        padding: var(--spacing-md);
        text-align: center;
    }

    .value-item h4 {
        text-align: center;
        margin-bottom: var(--spacing-xs);
    }

    .value-item p {
        text-align: center;
        margin-bottom: 0;
    }

    .about-image {
        margin-top: var(--spacing-md);
    }

    .tech-circle {
        width: 200px;
        height: 200px;
        margin: 0 auto;
    }

    .layer-1 {
        width: 180px;
        height: 180px;
    }

    .layer-2 {
        width: 140px;
        height: 140px;
    }

    .layer-3 {
        width: 100px;
        height: 100px;
    }

    .circle-center {
        width: 80px;
        height: 80px;
        font-size: 1.5rem;
    }

    /* 联系我们 */
    .contact-content {
        gap: var(--spacing-md);
        text-align: center;
    }

    .contact-item {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
        flex-direction: column;
        text-align: center;
    }

    .contact-item h4 {
        text-align: center;
    }

    .contact-item p {
        text-align: center;
    }

    .contact-icon {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .contact-form {
        padding: var(--spacing-sm);
        text-align: left;
    }

    .form-group input,
    .form-group textarea {
        padding: 0.75rem;
        font-size: 0.875rem;
    }

    .contact-form .btn {
        width: auto;
        max-width: 280px;
        min-width: 200px;
        margin: 0 auto;
        display: block;
    }

    /* 页脚 */
    .footer {
        padding: var(--spacing-md) 0 var(--spacing-md);
        text-align: center;
        margin-top: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-sm);
    }

    /* 隐藏页脚中产品和解决方案栏目 */
    .footer-section:nth-child(2),
    .footer-section:nth-child(3) {
        display: none !important;
    }

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

    .footer-section h3,
    .footer-section h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-sm);
        text-align: center;
    }

    .footer-section p {
        font-size: 0.875rem;
        text-align: center;
        line-height: 1.6;
    }

    .footer-section ul {
        text-align: center;
        padding: 0;
    }

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

    .footer-section ul a {
        font-size: 0.875rem;
        display: inline-block;
        padding: var(--spacing-xs) 0;
    }

    .footer-bottom {
        font-size: 0.75rem;
        padding-top: var(--spacing-md);
        text-align: center;
        line-height: 1.8;
    }

    .footer-bottom p {
        margin-bottom: var(--spacing-xs);
    }

    /* 滚动到顶部按钮 */
    .scroll-to-top {
        width: 40px !important;
        height: 40px !important;
        bottom: 20px !important;
        right: 20px !important;
        font-size: 1.25rem !important;
    }

    /* 优化触摸目标 */
    a, button, .card {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* 隐藏鼠标效果（移动端不需要） */
    .cursor-glow {
        display: none;
    }
}

/* 超小屏幕优化 (最大 375px) */
@media (max-width: 375px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .phone-frame {
        width: 90px;
        height: 180px;
    }

    .app-screenshots {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 1rem;
    }

    .logo-placeholder {
        width: 80px;
        height: 80px;
    }

    .app-icon {
        font-size: 2.5rem;
    }

    /* 按钮优化 */
    .btn,
    .download-btn {
        max-width: 240px;
        min-width: 180px;
        padding: 0.75rem 1.5rem;
    }

    .contact-form .btn {
        max-width: 240px;
        min-width: 180px;
    }
}