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

/* 根变量定义 */
:root {
    --primary-color: #00D4FF;
    --secondary-color: #40E0D0;
    --accent-color: #FF6B35;
    --dark-bg: #0F1419;
    --dark-surface: #1A1F2E;
    --dark-card: #252B3D;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 16px 64px rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #00D4FF 0%, #40E0D0 100%);
    --gradient-dark: linear-gradient(135deg, #0F1419 0%, #1A1F2E 100%);
    --gradient-card: linear-gradient(135deg, rgba(26, 31, 46, 0.8) 0%, rgba(37, 43, 61, 0.8) 100%);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.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%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--dark-bg);
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-bg);
    font-size: 18px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

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

.hero-bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-dark);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(64, 224, 208, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    animation: particle-float 20s ease-in-out infinite;
}

@keyframes particle-float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-subtitle {
    display: block;
    font-size: 32px;
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.stat-number.animating {
    animation: numberPulse 2s ease-out;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

/* 备选方案 - 对于不支持background-clip的浏览器 */
.stat-number.animating.fallback {
    background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: initial;
    background-clip: initial;
    color: #40e0d0;
}

@keyframes numberPulse {
    0% {
        transform: scale(0.8);
        opacity: 0.5;
        filter: blur(2px);
    }
    50% {
        transform: scale(1.05);
        filter: blur(0px);
    }
    100% {
        transform: scale(1);
        opacity: 1;
        filter: blur(0px);
    }
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 手机模拟器 - iPhone 14 Pro Max样式 */
.phone-mockup {
    position: relative;
    width: 280px;
    height: 580px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #1c1c1e 0%, #2c2c2e 30%, #3a3a3c 70%, #1c1c1e 100%);
    border-radius: 25px;
    padding: 3px;
    box-shadow: 
        0 0 0 1px #000000,
        0 0 0 2px #1a1a1a,
        0 0 0 3px #2a2a2a,
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.3);
    position: relative;
    transform: perspective(1200px) rotateY(-8deg) rotateX(8deg);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.phone-frame:hover {
    transform: perspective(1200px) rotateY(-5deg) rotateX(5deg) scale(1.03);
    box-shadow: 
        0 0 0 1px #000000,
        0 0 0 2px #1a1a1a,
        0 0 0 3px #2a2a2a,
        0 30px 60px rgba(0, 0, 0, 0.5),
        0 0 25px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.4);
}

/* 移除刘海设计 */

.phone-frame::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    width: 3px;
    height: 60px;
    background: linear-gradient(180deg, #000000, #1a1a1a, #2a2a2a, #1a1a1a, #000000);
    border-radius: 1.5px;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 22px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.3);
    background: #000000;
}

.app-interface-image {
    width: 100%;
    height: 100%;
    border-radius: 22px;
}

.app-interface-image:hover {
    /* 移除图片放大效果 */
}

/* 功能特色 */
.features {
    padding: 120px 0;
    background: var(--dark-surface);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: 32px;
    backdrop-filter: blur(20px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--dark-bg);
    margin-bottom: 24px;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    color: var(--text-muted);
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 产品展示 */
.products {
    padding: 120px 0;
    background: var(--dark-bg);
}

.products-showcase {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

.product-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-item.reverse {
    direction: rtl;
}

.product-item.reverse > * {
    direction: ltr;
}

.product-visual {
    display: flex;
    justify-content: center;
}

.product-mockup {
    position: relative;
}

.server-mockup {
    width: 400px;
    height: 300px;
    background: var(--dark-card);
    border-radius: var(--border-radius-large);
    padding: 24px;
}

.admin-mockup {
    width: 500px;
    height: 380px;
    background: var(--dark-card);
    border-radius: var(--border-radius-large);
    padding: 24px;
    overflow: hidden;
}

.server-interface {
    width: 100%;
    height: 100%;
}

.server-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.server-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.server-status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #4CAF50;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.api-endpoint {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
}

.method {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.method.get {
    background: #4CAF50;
    color: white;
}

.method.post {
    background: #2196F3;
    color: white;
}

.method.put {
    background: #FF9800;
    color: white;
}

.path {
    font-family: 'Courier New', monospace;
    color: var(--text-secondary);
    font-size: 14px;
}

.status {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
}

/* 管理后台样式 */
.admin-showcase {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
    max-width: 500px;
}

.admin-image-placeholder {
    width: 100%;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.admin-image-placeholder:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
}

.placeholder-content {
    text-align: center;
    color: var(--text-secondary);
}

.placeholder-content i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--text-muted);
}

.placeholder-content p {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.placeholder-content span {
    font-size: 12px;
    color: var(--text-muted);
}

.admin-interface {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.admin-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.admin-status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #4CAF50;
    animation: pulse 2s infinite;
}

.admin-content {
    flex: 1;
    display: flex;
    gap: 16px;
}

.admin-nav {
    flex: 0 0 120px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    transition: all 0.2s ease;
    cursor: pointer;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary-color);
}

.nav-item i {
    width: 14px;
    text-align: center;
}

.admin-dashboard {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.stat-box {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 10px;
    color: var(--text-secondary);
}

.dashboard-chart {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.chart-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.chart-bars {
    display: flex;
    align-items: end;
    gap: 6px;
    height: 60px;
}

.bar {
    width: 12px;
    background: linear-gradient(to top, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    transition: all 0.3s ease;
}

.bar:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

.chart-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-align: center;
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.product-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.feature-tag {
    padding: 6px 12px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.product-tech {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tech-label {
    color: var(--text-muted);
    font-size: 14px;
}

.tech-item {
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* iPhone手机样式 */
.iphone-mockup {
    width: 320px;
    height: 640px;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1200px;
}

.iphone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1c1c1e 0%, #2c2c2e 30%, #3a3a3c 70%, #1c1c1e 100%);
    border-radius: 25px;
    padding: 3px;
    position: relative;
    box-shadow: 
        0 0 0 1px #000000,
        0 0 0 2px #1a1a1a,
        0 0 0 3px #2a2a2a,
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.3);
    transform: perspective(1200px) rotateY(-8deg) rotateX(8deg);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.iphone-frame:hover {
    transform: perspective(1200px) rotateY(-5deg) rotateX(5deg) scale(1.03);
    box-shadow: 
        0 0 0 1px #000000,
        0 0 0 2px #1a1a1a,
        0 0 0 3px #2a2a2a,
        0 30px 60px rgba(0, 0, 0, 0.5),
        0 0 25px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.4);
}

/* 移除刘海设计 */

.iphone-screen {
    width: 100%;
    height: 100%;
    background: #000000;
    border-radius: 22px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.3);
}

.iphone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 22px;
}

/* 移除home indicator设计 */

/* 关于我们 */
.about {
    padding: 120px 0;
    background: var(--dark-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    backdrop-filter: blur(20px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--dark-bg);
}

.stat-content {
    flex: 1;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

.about-visual {
    display: flex;
    justify-content: center;
}

.team-photo {
    width: 400px;
    height: 400px;
    border-radius: 5px;
    overflow: hidden;
}

.photo-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--text-muted);
}

.team-image {
    width: 100%;
    height: 100%;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: var(--dark-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    backdrop-filter: blur(20px);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--dark-bg);
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-details p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: 40px;
    backdrop-filter: blur(20px);
}

.form-group {
    margin-bottom: 24px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

/* 下载区域 */
.download {
    padding: 120px 0;
    background: var(--gradient-dark);
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.download-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.download-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: var(--dark-card);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-medium);
}

.qr-placeholder {
    font-size: 48px;
    color: var(--text-muted);
}

.qr-tip {
    color: var(--text-muted);
    font-size: 14px;
}

/* 页脚 */
.footer {
    background: var(--dark-surface);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-copyright {
    color: var(--text-muted);
}

.footer-links-bottom {
    display: flex;
    gap: 24px;
}

.footer-links-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .title-subtitle {
        font-size: 24px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .product-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .title-subtitle {
        font-size: 20px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .title-subtitle {
        font-size: 16px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .contact-form {
        padding: 24px;
    }
}

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

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

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}