/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根变量 - 蓝色主题 */
:root {
    --primary-blue: #0066cc;
    --secondary-blue: #004499;
    --light-blue: #3399ff;
    --dark-blue: #003366;
    --accent-blue: #0080ff;
    --accent-green: #00ff88;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --text-white: #ffffff;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #1a1a1a;
    --bg-gradient: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    --border-light: #e0e0e0;
    --shadow: 0 4px 20px rgba(0, 102, 204, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 102, 204, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 102, 204, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --animation-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--bg-gradient);
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    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="%23e0e0e0" stroke-width="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: -1;
    pointer-events: none;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 249, 250, 0.95) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    box-shadow: 0 4px 30px rgba(0, 102, 204, 0.15);
    padding: 0.5rem 0;
}

.navbar.scrolled {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.99) 0%, rgba(248, 249, 250, 0.98) 100%);
    box-shadow: 0 8px 40px rgba(0, 102, 204, 0.2);
    border-bottom: 1px solid rgba(0, 102, 204, 0.15);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 12px;
}

.nav-logo:hover {
    background: rgba(0, 102, 204, 0.1);
    transform: translateY(-2px);
}

.logo-img {
    height: 35px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0, 102, 204, 0.3));
    transition: var(--transition);
}

.nav-logo:hover .logo-img {
    filter: drop-shadow(0 4px 12px rgba(0, 102, 204, 0.5));
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 1rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    white-space: nowrap;
    min-width: fit-content;
    flex-shrink: 0;
}

.nav-menu a:hover {
    color: var(--primary-blue);
    background: rgba(0, 102, 204, 0.1);
    transform: translateY(-2px);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-menu a:hover::after {
    width: 80%;
}

.nav-menu a.active {
    color: var(--primary-blue);
    background: rgba(0, 102, 204, 0.15);
    font-weight: 700;
}

.nav-menu a.active::after {
    width: 80%;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
}

/* 下拉菜单活动状态 */
.nav-menu .dropdown.active > a {
    color: var(--primary-blue);
    background: rgba(0, 102, 204, 0.15);
    font-weight: 700;
}

.nav-menu .dropdown.active > a::after {
    width: 80%;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
}

/* 当前页面高亮状态 - 不触发下拉菜单显示 */
.nav-menu .dropdown > a.current-page {
    color: var(--primary-blue) !important;
    background: rgba(0, 102, 204, 0.15) !important;
    font-weight: 700 !important;
}

.nav-menu .dropdown > a.current-page::after {
    width: 80% !important;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green)) !important;
}

.register-button {
    margin-left: 1rem;
}

.register-btn {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.register-btn:hover {
    background: var(--primary-blue);
    color: var(--text-white);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
}

.login-button {
    margin-left: 1rem;
}

.login-btn {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
    border-color: rgba(255, 255, 255, 0.5);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* 英雄区块 */
.hero {
    height: 75vh;
    background: transparent;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    display: none;
}

.hero::after {
    display: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    from {
        filter: drop-shadow(0 0 20px rgba(0, 102, 204, 0.3));
    }
    to {
        filter: drop-shadow(0 0 30px rgba(0, 102, 204, 0.5));
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.6;
    position: relative;
    animation: fadeInUp 1s ease-out 0.3s both;
}

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

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 150px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before,
.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before,
.btn-secondary:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.3);
}

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

.btn-secondary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.btn-secondary:hover {
    transform: translateY(-3px) scale(1.05);
    color: var(--text-white);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.3);
}

.btn-secondary:hover::after {
    opacity: 1;
}

/* 网络动画 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

/* 合并到通用图片样式 */

.network-animation {
    position: relative;
    width: 400px;
    height: 400px;
}

.node {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    box-shadow: var(--shadow);
    animation: pulse 2s infinite;
}

.center-node {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--secondary-blue);
    width: 100px;
    height: 100px;
    font-size: 2rem;
}

.node-1 {
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0.5s;
}

.node-2 {
    bottom: 20%;
    left: 20%;
    animation-delay: 1s;
}

.node-3 {
    bottom: 20%;
    right: 20%;
    animation-delay: 1.5s;
}

.connection {
    position: absolute;
    background: var(--light-blue);
    height: 3px;
    border-radius: 2px;
    animation: flow 3s infinite;
}

.con-1 {
    top: 45%;
    left: 50%;
    width: 120px;
    transform: translate(-50%, -50%) rotate(-45deg);
    animation-delay: 0.5s;
}

.con-2 {
    bottom: 35%;
    left: 35%;
    width: 150px;
    transform: rotate(45deg);
    animation-delay: 1s;
}

.con-3 {
    bottom: 35%;
    right: 35%;
    width: 150px;
    transform: rotate(-45deg);
    animation-delay: 1.5s;
}

/* 产品区块 */
.products {
    padding: 6rem 0;
    background: var(--bg-white);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 10% 10%, rgba(0, 102, 204, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(0, 255, 136, 0.03) 0%, transparent 40%);
    pointer-events: none;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
}

.section-title::before {
    content: '';
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--text-white);
    font-size: 1.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
    border-radius: 2px;
}

/* 为不同区块的标题设置不同的图标 */
#products .section-title::before {
    content: '\f0e8'; /* fa-cubes */
}

#features .section-title::before {
    content: '\f005'; /* fa-star */
}

.section-subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: var(--text-light);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

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

/* Hero responsive adjustments for tablets and mobile */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
}

.product-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-blue);
    transform: scaleX(0);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.product-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 102, 204, 0.05) 0%, transparent 50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-card:hover::after {
    opacity: 1;
}

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

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card-icon::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--accent-green), var(--primary-blue), var(--accent-green));
    border-radius: 20px;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.product-card:hover .card-icon::before {
    opacity: 0.3;
}

/* 图标样式 */
.card-icon i,
.card-icon svg {
    font-size: 2rem;
    color: var(--text-white);
    transition: transform 0.3s ease;
}

.card-icon svg {
    width: 40px;
    height: 40px;
    fill: currentColor;
}

.product-card:hover .card-icon i,
.product-card:hover .card-icon svg {
    transform: scale(1.1);
}

.feature-icon i,
.feature-icon svg {
    font-size: 2rem;
    color: var(--text-white);
    transition: transform 0.3s ease;
}

.feature-icon svg {
    width: 40px;
    height: 40px;
    fill: currentColor;
}

.feature-item:hover .feature-icon i,
.feature-item:hover .feature-icon svg {
    transform: scale(1.1);
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.product-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

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

/* 下拉菜单 - 重新设计，无冲突版本 */
.dropdown {
    position: relative;
    display: inline-block;
}

/* 下拉菜单基础样式 */
.dropdown-menu {
    /* 定位 */
    position: fixed;
    top: 75px;
    left: 50%;
    transform: translateX(-50%);

    /* 尺寸 - 高度自适应内容 */
    width: 380px;
    min-height: auto;
    max-height: none;

    /* 外观 */
    background: #ffffff;
    border: 2px solid #0066cc;
    border-radius: 12px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.25);

    /* 布局 */
    padding: 1rem 0;
    margin-top: 0.75rem;

    /* 显示控制 */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    /* 动画 */
    transition: all 0.3s ease-in-out;

    /* 层级 - 确保在导航栏之上 */
    z-index: 999999;
}

/* 下拉菜单显示状态 - 只有在悬停时显示 */
.dropdown:hover .dropdown-menu,
.dropdown.active:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* 移除冲突的活动状态规则 */

/* 最终修复版本 - 清除所有调试样式 */

/* 下拉菜单项 */
.dropdown-item {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    margin: 0.25rem 0.5rem;
    min-height: 80px;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid #f0f0f0;
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
}

.dropdown-item:first-child {
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.dropdown-item:last-child {
    border-bottom: none;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
}


/* 下拉菜单图标 */
.dropdown-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    flex-shrink: 0;
}

.dropdown-icon i {
    font-size: 1.2rem;
    color: white;
}

/* 下拉菜单内容 */
.dropdown-content {
    flex: 1;
    margin-right: 1rem;
}

.dropdown-content h4 {
    margin: 0 0 0.25rem 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: #333;
}

.dropdown-content p {
    margin: 0;
    font-size: 0.8rem;
    color: #666;
    line-height: 1.3;
}

.dropdown-item:hover .dropdown-content h4 {
    color: var(--primary-blue);
}

/* 下拉菜单箭头 */
.dropdown-arrow {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dropdown-arrow i {
    font-size: 0.8rem;
    color: #999;
    transition: color 0.2s ease;
}

.dropdown-item:hover .dropdown-arrow i {
    color: var(--primary-blue);
}

/* 下拉菜单小箭头 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid #ffffff;
}

/* 英雄区块插图 */
.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.hero-illustration svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 102, 204, 0.2));
}

/* 特色功能 */
.features {
    padding: 6rem 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 15px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.feature-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 联系我们 */
.contact {
    padding: 6rem 0;
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-light);
}

.contact-form {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 2px solid var(--border-light);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* 数据统计 */
.stats {
    padding: 4rem 0;
    background: var(--primary-blue);
    color: var(--text-white);
}

/* Index page specific stats styles */
.stats .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stats .container .stats-grid .stat-item {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.stats .container .stats-grid .stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-white);
    text-align: center;
    width: 100%;
}

.stats .container .stats-grid .stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
    text-align: center;
    align-self: center;
    justify-self: center;
    width: 100%;
    margin: 0 auto;
}

/* 客户见证 */
.testimonials {
    padding: 6rem 0;
    background: var(--bg-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 20px;
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    font-style: italic;
    color: var(--text-dark);
    line-height: 1.6;
    font-size: 1.1rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
}

.author-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.author-company {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 技术优势 */
.tech-advantages {
    padding: 6rem 0;
    background: var(--bg-light);
}

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

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.advantage-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.advantage-text h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

.tech-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-visual svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 20px rgba(0, 102, 204, 0.15));
}

/* 行业应用 */
.industries {
    padding: 6rem 0;
    background: var(--bg-white);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.industry-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
}

.industry-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.industry-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-blue);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 1.8rem;
}

.industry-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 页面头部 */
.page-header {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    text-align: center;
}

.breadcrumb {
    margin-bottom: 2rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

.breadcrumb a {
    color: var(--text-white);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    opacity: 1;
}

.breadcrumb span {
    margin: 0 0.5rem;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 产品导航 */
.product-nav {
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 80px;
    z-index: 100;
}

.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1rem 0;
    overflow-x: auto;
}

.nav-tab {
    padding: 1rem 2rem;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-tab.active,
.nav-tab:hover {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

/* 产品区块 */
.product-section {
    padding: 3rem 0;
    border-bottom: 1px solid var(--border-light);
}

.product-section:nth-child(even) {
    background: var(--bg-light);
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 2rem;
}

.product-icon-large {
    margin-bottom: 2rem;
}

.product-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.product-description {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.feature-highlights h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.features-list .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.features-list .feature-item i {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.features-list .feature-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.features-list .feature-item p {
    color: var(--text-light);
    line-height: 1.5;
}

.product-visual {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
}

.product-visual svg,
.product-visual img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 20px rgba(0, 102, 204, 0.15));
}

/* 通用图片样式 */
.product-image,
.solution-image {
    width: 500px;
    height: 400px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 102, 204, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-image:hover,
.solution-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 102, 204, 0.25);
}

/* 英雄区图片样式 - 无背景 */
.hero-image {
    width: 500px;
    height: 400px;
    object-fit: contain;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    transition: transform 0.3s ease;
}

.hero-image:hover {
    transform: translateY(-5px);
}

/* 价格方案 */
.pricing-section {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 2px solid var(--border-light);
}

.pricing-section h3 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    border: 2px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.pricing-card.popular {
    border-color: var(--primary-blue);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary-blue);
    color: var(--text-white);
    padding: 0.5rem 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    transform: rotate(45deg);
}

.plan-header {
    margin-bottom: 2rem;
}

.plan-header h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.price {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

.current-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.pricing-card .original-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.15rem;
    margin-top: 0.1rem;
    text-decoration: line-through;
    opacity: 0.7;
    font-size: 0.5em;
}

.pricing-card .original-price .amount {
    font-size: 1.1rem !important;
    font-weight: 400;
}

.pricing-card .original-price .currency {
    font-size: 1.1rem !important;
}

.pricing-card .original-price .period {
    font-size: 1.1rem !important;
}

.currency {
    font-size: 1.2rem;
    color: var(--text-light);
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.period {
    font-size: 1rem;
    color: var(--text-light);
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
}

.plan-features li {
    padding: 0.75rem 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    padding-left: 1.5rem;
}

.plan-features li:last-child {
    border-bottom: none;
}

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

/* 下载区块 */
.download-section {
    margin-top: 0;
    padding-top: 0;
    width: 100%;
}

.download-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 2px solid transparent;
}

.download-btn:hover {
    background: var(--primary-blue);
    color: var(--text-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.download-btn i {
    font-size: 2rem;
    color: var(--primary-blue);
}

.download-btn:hover i {
    color: var(--text-white);
}

.platform {
    font-weight: 600;
    font-size: 1.1rem;
}

.version {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 公司介绍 */
.company-intro {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.intro-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.intro-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.intro-visual svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 20px rgba(0, 102, 204, 0.15));
}

/* 核心价值 */
.core-values {
    padding: 6rem 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.value-item {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.value-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.value-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 团队介绍 */
.team-section {
    padding: 6rem 0;
    background: var(--bg-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-member {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.member-avatar {
    width: 100px;
    height: 100px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2.5rem;
}

.member-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.position {
    color: var(--primary-blue);
    font-weight: 500;
    margin-bottom: 1rem;
}

.bio {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 里程碑 */
.milestones {
    padding: 6rem 0;
    background: var(--bg-light);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 3rem auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-blue);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    width: 100px;
    height: 100px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    margin: 0 2rem;
    box-shadow: var(--shadow);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: -20px;
    border-right-color: var(--bg-white);
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: -20px;
    border-left-color: var(--bg-white);
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

/* CTA区块 */
.cta-section {
    padding: 6rem 0;
    background: var(--primary-blue);
    color: var(--text-white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-buttons .btn-primary {
    background: var(--text-white);
    color: var(--primary-blue);
}

.cta-buttons .btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-3px);
}

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

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

/* 帮助中心样式 */
.help-search {
    padding: 3rem 0;
    background: var(--bg-light);
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-white);
    border-radius: 50px;
    box-shadow: var(--shadow);
    padding: 0.5rem;
}

.search-box i {
    position: absolute;
    left: 1.5rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    padding: 1rem 1rem 1rem 3rem;
    font-size: 1rem;
    background: transparent;
}

.search-btn {
    background: var(--primary-blue);
    color: var(--text-white);
    border: none;
    padding: 1rem 2rem;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--secondary-blue);
}

.help-categories {
    padding: 6rem 0;
    background: var(--bg-white);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.category-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.category-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.category-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.category-link:hover {
    color: var(--secondary-blue);
}

/* FAQ样式 */
.faq-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    background: var(--bg-white);
    border-radius: 15px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.faq-question i {
    color: var(--primary-blue);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 2rem 1.5rem;
}

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

/* 支持联系 */
.support-contact {
    padding: 4rem 0;
    background: var(--bg-white);
}

.support-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    text-align: center;
}

.support-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.support-info p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.support-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.support-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
    padding: 2.5rem 1.5rem;
    background: var(--bg-light);
    border-radius: 15px;
    transition: var(--transition);
    height: 100%;
    box-sizing: border-box;
}

.support-method:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow);
}

.method-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.method-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.method-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.method-info .btn-primary,
.method-info .btn-secondary {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-block;
    border-radius: 25px;
    transition: var(--transition);
}

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

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

.support-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.support-visual svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 20px rgba(0, 102, 204, 0.15));
}

/* 解决方案页面样式 */
.solutions-overview {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.overview-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.overview-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.overview-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

.overview-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.overview-stats .stat-label {
    color: var(--text-light);
    font-size: 0.95rem;
}

.overview-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.overview-visual svg {
    max-width: 100%;
    height: auto;
    min-height: 350px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    filter: drop-shadow(0 5px 20px rgba(0, 102, 204, 0.15));
}

.overview-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.overview-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 102, 204, 0.3);
}

/* 行业解决方案 */
.industry-solutions {
    padding: 6rem 0;
    background: var(--bg-light);
}

.solution-item {
    margin-bottom: 6rem;
    padding: 4rem 0;
}

.solution-item:last-child {
    margin-bottom: 0;
}

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

.solution-item.reverse .solution-content {
    direction: rtl;
}

.solution-item.reverse .solution-info {
    direction: ltr;
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 2rem;
    margin-bottom: 2rem;
}

.solution-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.solution-info p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.solution-features .feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-white);
    border-radius: 10px;
    transition: var(--transition);
}

.solution-features .feature-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.solution-features .feature-item i {
    width: 30px;
    height: 30px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.solution-features .feature-item span {
    font-weight: 500;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.solution-results h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.solution-results ul {
    list-style: none;
}

.solution-results li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

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

/* 可视化元素 */
.solution-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 已合并到通用图片样式 */

.mockup-browser {
    width: 400px;
    background: var(--bg-white);
    border-radius: 15px;
    box-shadow: var(--shadow-hover);
    overflow: hidden;
}

.browser-header {
    background: #f5f5f5;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.browser-buttons {
    display: flex;
    gap: 0.5rem;
}

.browser-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff5f57;
}

.browser-buttons span:nth-child(2) {
    background: #ffbd2e;
}

.browser-buttons span:nth-child(3) {
    background: #28ca42;
}

.browser-url {
    flex: 1;
    background: var(--bg-white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.browser-content {
    padding: 2rem;
    min-height: 250px;
}

.shop-layout {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.shop-header {
    height: 40px;
    background: var(--primary-blue);
    border-radius: 8px;
    opacity: 0.8;
}

.shop-products {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.product-item {
    height: 80px;
    background: var(--bg-light);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.product-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 102, 204, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* 游戏仪表板 */
.game-dashboard {
    width: 350px;
    background: var(--bg-dark);
    border-radius: 15px;
    padding: 2rem;
    color: var(--text-white);
}

.dashboard-header h4 {
    color: var(--light-blue);
    margin-bottom: 2rem;
    text-align: center;
}

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

.metric {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 102, 204, 0.1);
    border-radius: 10px;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light-blue);
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 安全仪表板 */
.security-dashboard {
    width: 350px;
    background: var(--bg-white);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.security-shield {
    width: 100px;
    height: 100px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    color: var(--text-white);
    font-size: 3rem;
}

.security-metrics {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.security-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 10px;
}

.security-item i {
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.security-item span {
    font-weight: 500;
    color: var(--text-dark);
}

/* 实施流程 */
.implementation-process {
    padding: 6rem 0;
    background: var(--bg-white);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--primary-blue);
    z-index: 0;
}

.step-item {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
    position: relative;
    z-index: 2;
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.step-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.footer-logo .logo-img {
    height: 35px;
    width: auto;
    object-fit: contain;
}

.footer-brand p {
    color: #cccccc;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.link-group h4 {
    color: var(--light-blue);
    margin-bottom: 1rem;
    font-weight: 600;
}

.link-group a {
    display: block;
    color: #cccccc;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.link-group a:hover {
    color: var(--light-blue);
}

.footer-bottom {
    border-top: 1px solid #333333;
    padding-top: 1rem;
    text-align: center;
    color: #999999;
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(0, 102, 204, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(0, 102, 204, 0);
    }
}

@keyframes flow {
    0% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0.3;
    }
}


/* 响应式设计 */
@media (max-width: 1200px) {
    .nav-container {
        padding: 1rem 15px;
    }

    .nav-menu {
        gap: 0.875rem;
    }

    .nav-menu a {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .dropdown-content h4 {
        font-size: 0.9rem;
    }

    .dropdown-content p {
        font-size: 0.75rem;
    }
}

@media (max-width: 1024px) {
    .nav-menu {
        gap: 0.75rem;
    }

    .nav-menu a {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .dropdown-content h4 {
        font-size: 0.85rem;
    }

    .dropdown-content p {
        font-size: 0.7rem;
    }
}

/* 平板端响应式 */
@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-white);
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow);
        gap: 0;
        overflow-x: visible;
    }

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

    .dropdown-menu {
        position: static;
        width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.9);
        margin: 0.5rem 0;
        border-radius: 8px;
    }

    .dropdown-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
        margin: 0;
        background: white;
    }

    .dropdown-icon {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }

    .dropdown-content {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }

    .dropdown-arrow {
        position: absolute;
        top: 1rem;
        right: 1rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-illustration svg {
        width: 350px;
        height: 280px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .tech-visual {
        order: -1;
    }
    
    .tech-visual svg {
        width: 350px;
        height: 250px;
    }
    
    .industries-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    /* 产品页面响应式 */
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .nav-tabs {
        gap: 1rem;
        padding: 1rem;
    }
    
    .nav-tab {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .product-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .product-visual {
        order: -1;
    }
    
    .product-visual svg,
    .product-visual img {
        width: 350px;
        height: 250px;
    }
    
    .product-image,
    .solution-image {
        width: 350px;
        height: 250px;
    }
    
    .hero-image {
        width: 350px;
        height: 250px;
        object-fit: contain;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .support-methods {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .features-list {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-10px);
    }
    
    .download-buttons {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn-primary, .btn-secondary {
        padding: 0.8rem 1.5rem;
        min-width: 120px;
    }

    .network-animation {
        width: 250px;
        height: 250px;
    }

    .node {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
    }

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

    .nav-menu a {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
}

/* 桌面端下拉菜单 - 简洁版本 */
@media (min-width: 769px) {
    .dropdown-menu {
        position: fixed;
        top: 75px;
        left: 50%;
        width: 380px;
        background: #ffffff;
        border: 1px solid #e0e0e0;
        border-radius: 12px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        z-index: 999999;
        margin: 0;

        /* 增加顶部padding创建连接区域 */
        padding-top: 10px;
    }

    /* 恢复小箭头样式 */
    .dropdown-menu::before {
        content: '';
        position: absolute;
        top: -6px;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 0;
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-bottom: 6px solid #ffffff;
        z-index: 10;
    }

    /* 创建不可见的连接区域 */
    .dropdown-menu::after {
        content: '';
        position: absolute;
        top: -10px;
        left: 0;
        right: 0;
        height: 15px;
        background: transparent;

        /* 默认隐藏 */
        opacity: 0;
        visibility: hidden;
        pointer-events: none;

        /* 动画 */
        transition: all 0.3s ease;
    }

    /* 激活状态 */
    .dropdown.active .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

/* 全球网络节点页面专用样式 */
.network-hero {
    background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
    padding: 8rem 0 4rem;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.network-hero::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="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.network-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.network-hero p {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

/* 全球地图区域 */
.global-map-section {
    padding: 6rem 0;
    background: #f8f9fa;
}

.map-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.map-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.map-subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 4rem;
}

.world-map {
    width: 100%;
    height: 500px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    margin-bottom: 3rem;
}

.map-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 16px;
}

/* 节点列表区域 */
.nodes-section {
    padding: 6rem 0;
    background: white;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    text-align: center;
    margin-bottom: 4rem;
}

.region-group {
    margin-bottom: 4rem;
}

.region-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: #0066cc;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.region-icon {
    width: 24px;
    height: 24px;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.node-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.node-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    position: relative;
}

.node-info::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #28a745, transparent);
    transform: translateY(-50%) translateX(-100%);
    animation: flash 2s infinite;
}

@keyframes flash {
    0% {
        transform: translateY(-50%) translateX(-100%);
        opacity: 0;
    }
    50% {
        transform: translateY(-50%) translateX(0%);
        opacity: 1;
    }
    100% {
        transform: translateY(-50%) translateX(100%);
        opacity: 0;
    }
}

.node-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 102, 204, 0.1), transparent);
    transition: left 0.5s;
}

.node-card:hover {
    border-color: #0066cc;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.15);
}

.node-card:hover::before {
    left: 100%;
}

.node-flag {
    font-size: 1.5rem;
    margin: 0;
}

.node-name {
    font-size: 1rem;
    font-weight: 600;
    color: #1a1a1a;
    margin: 0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.node-name:hover {
    color: #0066cc;
}

.stats-section {
    background: #0066cc;
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

/* Index page specific mobile styles */
.stats .container .stats-grid .stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #ffffff;
    text-align: center;
    width: 100%;
}

.stats .container .stats-grid .stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.2;
    text-align: center;
    align-self: center;
    justify-self: center;
    width: 100%;
    margin: 0 auto;
}

/* 全球网络节点页面响应式设计 */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }

    .nodes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .network-hero h1 {
        font-size: 2.5rem;
    }

    .network-hero p {
        font-size: 1.1rem;
    }

    .world-map {
        height: 300px;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .node-card {
        height: 100px;
    }

    .node-flag {
        font-size: 1.5rem;
    }

    .node-name {
        font-size: 0.9rem;
    }
}

/* 产品概述样式 - 缺失的样式 */
.product-overview {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.overview-text {
    flex-direction: column;
    gap: 2rem;
}

.overview-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.overview-description {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.product-overview .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.product-overview .stat-item {
    text-align: center;
    padding: 0.8rem 1rem;
    background: var(--bg-light);
    border-radius: 15px;
    transition: var(--transition);
    border: 1px solid var(--border-light);
    white-space: nowrap;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-overview .stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary-blue);
}

.product-overview .stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.4rem;
    display: block;
    white-space: nowrap;
    line-height: 1.1;
}

.product-overview .stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
    white-space: nowrap;
    line-height: 1.2;
}

.overview-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 核心特性网格样式 */
.features-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.features-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-section .features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.feature-card .feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
    box-shadow: var(--shadow);
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 安全保障样式 */
.security-features {
    padding: 6rem 0;
    background: var(--bg-white);
}

.security-features h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.security-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.security-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 15px;
    transition: var(--transition);
}

.security-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.security-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.security-text h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

/* 技术优势样式 */
.tech-advantages {
    padding: 6rem 0;
    background: var(--bg-light);
}

.tech-advantages h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.advantages-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 15px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.advantage-number {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

/* 支持的云平台样式 */
.supported-platforms {
    padding: 6rem 0;
    background: var(--bg-white);
}

.supported-platforms h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.platform-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.platform-logo {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.platform-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 技术架构样式 */
.tech-architecture {
    padding: 6rem 0;
    background: var(--bg-light);
}

.tech-architecture h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.architecture-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.architecture-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 15px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.architecture-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.architecture-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.architecture-text h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

/* 使用场景样式 */
.use-cases {
    padding: 6rem 0;
    background: var(--bg-white);
}

.use-cases h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.case-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.case-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.case-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 安全区块样式 */
.security-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.security-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.security-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.security-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

.security-card .security-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--text-white);
    font-size: 2rem;
}

.security-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

/* 下载区域样式 */
.download-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

/* VPN页面增强版下载区域样式 */
.download-cta-enhanced {
    margin: 1.5rem 0 0 0;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.05) 0%, rgba(0, 68, 153, 0.08) 100%);
    border: 2px solid rgba(0, 102, 204, 0.1);
    border-radius: 24px;
    padding: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.download-cta-enhanced::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.download-cta-enhanced:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 102, 204, 0.15);
    border-color: rgba(0, 102, 204, 0.2);
}

.cta-content {
    flex: 1;
    z-index: 2;
}

.cta-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-content p {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.cta-visual {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.3);
    transition: var(--transition);
    flex-shrink: 0;
}

.download-cta-enhanced:hover .cta-visual {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 15px 40px rgba(0, 102, 204, 0.4);
}

/* 主下载按钮样式（更新版） */
.download-btn-main {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-white);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 6px 25px rgba(0, 102, 204, 0.3);
    position: relative;
    overflow: hidden;
}

.download-btn-main::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;
}

.download-btn-main:hover::before {
    left: 100%;
}

.download-btn-main:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.4);
    text-decoration: none;
    color: var(--text-white);
}

.download-btn-main i {
    font-size: 1.2rem;
    position: relative;
    z-index: 1;
}

/* VPN页面下载区域特殊样式 */
.vpn-download .download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.vpn-download .download-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.vpn-download .download-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
    text-decoration: none;
    color: var(--text-dark);
}

.vpn-download .download-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff !important;
    font-size: 1.5rem !important;
    position: relative;
    z-index: 2;
    transition: var(--transition);
}

.vpn-download .download-icon i {
    color: #ffffff !important;
    font-size: 1.5rem !important;
    display: block !important;
    opacity: 1 !important;
}

.vpn-download .download-card:hover .download-icon {
    background: var(--secondary-blue);
    transform: scale(1.1);
}

.vpn-download .download-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.vpn-download .version {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.vpn-download .download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--primary-blue);
    color: #ffffff !important;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.vpn-download .download-btn i {
    color: #ffffff !important;
    font-size: 0.9rem !important;
    display: block !important;
    opacity: 1 !important;
}

.vpn-download .download-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;
}

.vpn-download .download-btn:hover::before {
    left: 100%;
}

.vpn-download .download-btn:hover {
    background: var(--secondary-blue);
    transform: translateY(-2px);
    text-decoration: none;
    color: #ffffff !important;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.download-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.download-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.download-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
    text-decoration: none;
    color: var(--text-dark);
}

.download-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 2rem;
}

.download-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.version {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-blue);
    color: var(--text-white);
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--secondary-blue);
    transform: translateY(-2px);
    text-decoration: none;
    color: var(--text-white);
}

/* FAQ区域样式 */
.faq-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.faq-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.faq-list {
    max-width: 1200px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-white);
    border-radius: 15px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.faq-question i {
    color: var(--primary-blue);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 2rem 1.5rem;
}

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

/* 响应式设计 - 产品页面 */
@media (max-width: 768px) {
    .overview-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .overview-visual {
        order: -1;
    }

    .product-overview .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .features-section .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .security-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .advantages-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .architecture-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .security-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .download-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .vpn-download .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .download-cta-enhanced {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
        gap: 1.5rem;
    }

    .cta-visual {
        margin: 0 auto;
    }

    .cta-content h3 {
        font-size: 1.3rem;
    }

    .download-btn-main {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }
}

/* Notification Bar Styles - 公共样式 */
.notification-bar {
    background: linear-gradient(90deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    padding: 8px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
}

.notification-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    font-size: 14px;
}

.notification-text {
    font-weight: 500;
}

.notification-link {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.notification-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

/* Adjust navbar position when notification bar is present */
body.has-notification .navbar {
    top: 40px; /* Notification bar height */
}

body.has-notification {
    padding-top: 0; /* Remove extra space for notification bar */
}

/* Adjust mobile nav menu position when notification bar is present */
@media (max-width: 992px) {
    body.has-notification .nav-menu {
        top: 110px; /* Navbar height + notification bar height */
        height: calc(100vh - 110px);
    }
}