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

/* 根变量 - 视立方主题 */
:root {
    --primary-color: #0077b6;
    --primary-dark: #023e8a;
    --primary-light: #48cae4;
    --secondary-color: #00b4d8;
    --accent-color: #90e0ef;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-light: #f8fafc;
    --bg-dark: #0a1628;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #00b4d8 0%, #0077b6 100%);
    --gradient-dark: linear-gradient(135deg, #0a1628 0%, #0f2847 100%);
    --gradient-accent: linear-gradient(135deg, #90e0ef 0%, #00b4d8 100%);
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar.scrolled {
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.2);
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 180, 216, 0.15);
}

.navbar .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    transition: var(--transition);
}

.navbar.scrolled .navbar-brand {
    color: var(--text-primary);
}

.navbar-brand i {
    font-size: 26px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-toggler {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    font-size: 22px;
    cursor: pointer;
    color: #ffffff;
    padding: 8px 12px;
    transition: var(--transition);
}

.navbar.scrolled .navbar-toggler {
    color: var(--text-primary);
    border-color: rgba(0, 0, 0, 0.2);
}

.navbar-toggler:hover {
    background: rgba(255, 255, 255, 0.1);
}

.navbar-toggler-icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: none;
    position: relative;
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after,
.navbar-toggler-icon span {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
    transition: var(--transition);
}

.navbar-toggler-icon span {
    top: 50%;
    transform: translateY(-50%);
}

.navbar-toggler-icon::before {
    top: 4px;
}

.navbar-toggler-icon::after {
    bottom: 4px;
}

.navbar-nav {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 24px;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
    min-width: 0;
}

.navbar-nav .nav-item {
    position: relative;
}

.navbar-nav .nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.92);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 12px 16px;
    letter-spacing: 0.4px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    min-width: 0;
    flex-shrink: 0;
}

.navbar-nav .nav-link::before {
    content: '';
    width: 4px;
    height: 4px;
    background: rgba(0, 180, 216, 0.6);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.92);
}

.navbar-nav .nav-link:hover {
    color: var(--accent-color);
    background: rgba(0, 180, 216, 0.12);
    transform: translateY(-2px);
}

.navbar-nav .nav-link:hover::before {
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

.navbar.scrolled .navbar-nav .nav-link:hover {
    color: var(--accent-color);
    background: rgba(0, 180, 216, 0.12);
}

.navbar-nav .nav-link.active {
    color: var(--accent-color);
    background: rgba(0, 180, 216, 0.15);
}

.navbar-nav .nav-link.active::before {
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

.navbar.scrolled .navbar-nav .nav-link.active {
    color: var(--accent-color);
    background: rgba(0, 180, 216, 0.15);
}

.navbar-nav .nav-link::after {
    display: none;
}

/* 下拉菜单 */
.navbar-nav .dropdown {
    position: relative;
}

.navbar-nav .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    padding-right: 8px;
}

.navbar-nav .dropdown-toggle::after {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 11px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-secondary);
}

.navbar-nav .dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
    color: var(--primary-color);
}

.navbar-nav .dropdown-toggle:hover::after,
.navbar-nav .dropdown-toggle.active::after {
    color: var(--primary-color);
}

.navbar-nav .dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    min-width: 220px;
    background: #ffffff;
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 8px 0;
    list-style: none;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03),
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.02);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(60, 141, 188, 0.08);
    z-index: 1000;
    overflow: hidden;
}

.navbar-nav .dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 12px;
    height: 12px;
    background: #ffffff;
    border-left: 1px solid rgba(60, 141, 188, 0.08);
    border-top: 1px solid rgba(60, 141, 188, 0.08);
    transform: rotate(45deg);
    box-shadow: -2px -2px 4px rgba(0, 0, 0, 0.05);
}

.navbar-nav .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.navbar-nav .dropdown-item {
    padding: 13px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 14px;
    font-weight: 500;
    position: relative;
}

.navbar-nav .dropdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: linear-gradient(135deg, #3c8dbc 0%, #00c0ef 100%);
    border-radius: 0 3px 3px 0;
    transition: height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-nav .dropdown-item i {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-nav .dropdown-item:hover {
    background: linear-gradient(90deg, rgba(60, 141, 188, 0.06) 0%, rgba(0, 192, 239, 0.04) 100%);
    color: var(--primary-color);
    padding-left: 28px;
}

.navbar-nav .dropdown-item:hover::before {
    height: 24px;
}

.navbar-nav .dropdown-item:hover i {
    color: var(--primary-color);
}

.navbar-nav .dropdown-divider {
    height: 1px;
    margin: 8px 0;
    background: linear-gradient(90deg, transparent 0%, rgba(60, 141, 188, 0.1) 50%, transparent 100%);
}

/* 导航按钮 */
.navbar-nav .nav-btn {
    padding: 11px 26px;
    background: var(--gradient-primary);
    color: #ffffff;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 180, 216, 0.3);
    white-space: nowrap;
    flex-shrink: 0;
}

.navbar-nav .nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 180, 216, 0.45);
}

.navbar.scrolled .navbar-nav .nav-btn {
    background: var(--gradient-primary);
    color: #ffffff;
}

/* 移动端响应式导航 */
@media (max-width: 991px) {
    .navbar {
        background: linear-gradient(180deg, rgba(5, 15, 30, 1) 0%, rgba(10, 25, 50, 0.99) 100%);
        backdrop-filter: blur(30px);
        padding: 12px 0;
        border-bottom: 1px solid rgba(0, 180, 216, 0.08);
    }
    
    .navbar.scrolled {
        background: linear-gradient(180deg, rgba(5, 15, 30, 1) 0%, rgba(10, 25, 50, 0.99) 100%);
    }
    
    .navbar-brand {
        font-size: 20px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }
    
    .navbar-brand i {
        font-size: 24px;
        margin-right: 8px;
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: 3px;
        padding: 20px 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.45);
        border-radius: 16px;
        margin-top: 12px;
        border: 1px solid rgba(0, 180, 216, 0.08);
        box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
    }
    
    .navbar-nav .nav-item {
        width: 100%;
    }
    
    .navbar-nav .nav-link {
        color: rgba(255, 255, 255, 0.95);
        padding: 16px 24px;
        font-size: 17px;
        font-weight: 500;
        border-radius: 12px;
        margin: 4px 8px;
        display: flex;
        align-items: center;
        gap: 12px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        letter-spacing: 0.3px;
    }
    
    .navbar-nav .nav-link::before {
        content: '';
        width: 4px;
        height: 4px;
        background: rgba(0, 180, 216, 0.6);
        border-radius: 50%;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
        background: linear-gradient(135deg, rgba(0, 180, 216, 0.2) 0%, rgba(0, 119, 182, 0.15) 100%);
        color: var(--accent-color);
        padding-left: 28px;
        transform: translateX(4px);
    }
    
    .navbar-nav .nav-link:hover::before,
    .navbar-nav .nav-link.active::before {
        background: var(--accent-color);
        box-shadow: 0 0 12px var(--accent-color);
    }
    
    .navbar-nav .nav-link::after {
        display: none;
    }
    
    .navbar-nav .dropdown {
        position: relative;
        width: 100%;
    }
    
    .navbar-nav .dropdown-toggle {
        width: calc(100% - 16px);
        margin: 4px 8px;
    }
    
    .navbar-nav .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(0, 180, 216, 0.06);
        box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
        padding: 6px 0;
        margin: 0 16px 4px;
        border-radius: 10px;
        min-width: auto;
    }
    
    .navbar-nav .dropdown-item {
        color: rgba(255, 255, 255, 0.9);
        padding: 14px 24px 14px 40px;
        font-size: 16px;
        font-weight: 400;
        white-space: nowrap;
        border-radius: 8px;
        margin: 2px 6px;
        transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    
    .navbar-nav .dropdown-item i {
        font-size: 14px;
        opacity: 0.7;
    }
    
    .navbar-nav .dropdown-item:hover {
        background: linear-gradient(135deg, rgba(0, 180, 216, 0.15) 0%, rgba(0, 119, 182, 0.1) 100%);
        color: var(--accent-color);
        padding-left: 44px;
        transform: translateX(4px);
    }
    
    .navbar-nav .dropdown-item:hover i {
        opacity: 1;
        color: var(--accent-color);
    }
    
    .navbar-nav .nav-btn {
        margin-top: 12px;
        width: calc(100% - 32px);
        margin-left: 16px;
        text-align: center;
        padding: 16px 28px;
        font-size: 16px;
        font-weight: 600;
        border-radius: 12px;
        box-shadow: 0 6px 20px rgba(0, 180, 216, 0.35);
    }
    
    .navbar-nav .nav-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 30px rgba(0, 180, 216, 0.5);
    }
    
    .navbar.scrolled .navbar-brand,
    .navbar.scrolled .navbar-nav .nav-link,
    .navbar.scrolled .navbar-nav .dropdown-item {
        color: rgba(255, 255, 255, 0.95);
    }
    
    .navbar.scrolled .navbar-nav .nav-link:hover,
    .navbar.scrolled .navbar-nav .nav-link.active {
        background: linear-gradient(135deg, rgba(0, 180, 216, 0.2) 0%, rgba(0, 119, 182, 0.15) 100%);
        color: var(--accent-color);
    }
    
    /* 移动端导航动画 */
    .navbar-collapse {
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .navbar-collapse.show {
        animation: slideDown 0.3s ease-out;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #0a1628 0%, #0f2847 50%, #1a365d 100%);
}

.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top right, rgba(0, 180, 216, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(0, 119, 182, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-bg-circles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-bg-circles .circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.circle-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-color);
    bottom: 100px;
    left: -50px;
    animation: float 8s ease-in-out infinite reverse;
}

.circle-3 {
    width: 200px;
    height: 200px;
    background: var(--secondary-color);
    top: 50%;
    right: 30%;
    animation: float 7s ease-in-out infinite;
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--white);
}

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

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 50px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 35px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    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: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 6px 25px rgba(0, 180, 216, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 180, 216, 0.55);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

/* Hero 统计 */
.hero-stats {
    display: flex;
    gap: 60px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

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

/* Hero 卡片 */
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: absolute;
    width: 220px;
}

.hero-card:nth-child(1) {
    top: 0;
    right: 20px;
    animation: float 5s ease-in-out infinite;
}

.hero-card:nth-child(2) {
    bottom: 0;
    left: 20px;
    animation: float 5s ease-in-out infinite reverse;
}

.card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 16px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--white);
}

.hero-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.hero-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 24px;
    color: var(--text-light);
    animation: bounce 2s ease-in-out infinite;
    cursor: pointer;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* Section 通用 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(60, 141, 188, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 服务区域 */
.services {
    padding: 120px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--bg-light);
    transition: var(--transition);
}

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

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(60, 141, 188, 0.1) 0%, rgba(0, 192, 239, 0.1) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--primary-color);
    margin-bottom: 24px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--gradient-primary);
    color: var(--white);
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.service-link:hover {
    gap: 12px;
}

/* 优势区域 */
.advantages {
    padding: 120px 0;
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.advantages-text .section-header {
    text-align: left;
    margin-bottom: 40px;
}

.advantages-text .section-desc {
    margin: 0 0 40px;
    max-width: none;
}

.advantage-list {
    margin-bottom: 40px;
}

.advantage-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.advantage-icon {
    font-size: 24px;
    color: var(--accent-color);
    flex-shrink: 0;
    margin-top: 2px;
}

.advantage-content h4 {
    font-size: 18px;
    margin-bottom: 4px;
}

.advantage-content p {
    color: var(--text-secondary);
}

.advantages-image {
    display: flex;
    justify-content: center;
}

.image-box {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: rgba(255, 255, 255, 0.3);
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 20px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.floating-card i {
    font-size: 24px;
    color: var(--primary-color);
}

.card-1 {
    top: 30px;
    right: -30px;
    animation: float 4s ease-in-out infinite;
}

.card-2 {
    bottom: 30px;
    left: -30px;
    animation: float 5s ease-in-out infinite reverse;
}

/* CTA 区域 */
.cta {
    padding: 100px 0;
    background: var(--gradient-dark);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(60, 141, 188, 0.2) 0%, transparent 70%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    color: var(--white);
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 18px;
    margin-bottom: 40px;
}

.cta .btn-primary {
    background: var(--gradient-primary);
    box-shadow: 0 4px 30px rgba(60, 141, 188, 0.4);
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-brand {
    font-size: 18px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.brand-logo i {
    font-size: 28px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    margin-bottom: 24px;
    line-height: 1.7;
}

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

.social-links a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
    transition: var(--transition);
    text-decoration: none;
}

.social-links a:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

.footer-links h4,
.footer-contact h4 {
    color: var(--white);
    font-size: 18px;
    margin-bottom: 24px;
}

.footer-links ul,
.footer-contact ul {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-contact li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 4px;
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .hero-image {
        height: 400px;
    }

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

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

    .navbar-nav {
        gap: 16px;
    }

    .navbar-nav .nav-link {
        font-size: 14px;
        padding: 10px 12px;
        letter-spacing: 0.3px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition);
        gap: 20px;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        gap: 30px;
    }

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

    .section-title {
        font-size: 32px;
    }

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