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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

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

/* 防止图片被拖拽和选择 */
img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    pointer-events: none;
}

/* 视频元素允许交互但禁止下载 */
video {
    pointer-events: auto !important;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* 隐藏视频下载按钮 */
video::-webkit-media-controls-download-button {
    display: none !important;
}

video::-webkit-media-controls-enclosure {
    overflow: hidden !important;
}

video::-internal-media-controls-download-button {
    display: none !important;
}

/* 禁用画中画按钮 */
video::-webkit-media-controls-picture-in-picture-button {
    display: none !important;
}

/* 允许文本输入框选择 */
input[type="text"],
input[type="tel"],
input[type="email"],
textarea,
.contact-form input,
.contact-form textarea {
    -webkit-user-select: text !important;
    -moz-user-select: text !important;
    -ms-user-select: text !important;
    user-select: text !important;
}

/* 导航栏 */
.navbar {
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    background: linear-gradient(to right, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
    backdrop-filter: blur(10px);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo {
    height: 50px;
    width: auto;
}

.nav-brand-text h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
}

.nav-brand-text span {
    color: var(--text-light);
    font-size: 0.9rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

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

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


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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 100px 0 60px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    padding: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid transparent;
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.6s ease;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: all 0.3s ease;
    z-index: -1;
}

.btn-secondary:hover::before {
    left: 0;
}

.btn-secondary:hover {
    color: white;
    border-color: var(--primary-color);
}

/* 视频演示按钮特殊样式 */
.btn-video {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8787 100%);
    color: white;
    border: 2px solid transparent;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: pulse 2s infinite;
}

.btn-video::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: all 0.6s ease;
}

.btn-video:hover::before {
    width: 300px;
    height: 300px;
}

.btn-video:hover {
    background: linear-gradient(135deg, #ff5252 0%, #ff6b6b 100%);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 25px rgba(255, 107, 107, 0.4);
}

.btn-video i {
    font-size: 1.2em;
    animation: bounce 1.5s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 107, 107, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 107, 107, 0);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(3px);
    }
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 轮播图样式 */
.carousel {
    position: relative;
    width: 100%;
    height: 450px;
    overflow: hidden;
    background: #f0f0f0;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.carousel-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.carousel-item.active {
    opacity: 1;
    z-index: 1;
}

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

.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: var(--primary-color);
    width: 30px;
    border-radius: 6px;
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 3;
}

.carousel-control:hover {
    background: rgba(0, 0, 0, 0.7);
}

.carousel-control.prev {
    left: 20px;
    border-radius: 0 50% 50% 0;
}

.carousel-control.next {
    right: 20px;
    border-radius: 50% 0 0 50%;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--bg-white);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    font-size: 4rem;
    color: var(--primary-color);
}

.image-placeholder p {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: 1rem;
}

/* Section 通用样式 */
section {
    padding: 60px 0;
}

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

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Features Section */
.features {
    background: #ffffff;
    padding-top: 40px;
}

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

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    border-top: 3px solid transparent;
}

/* 为每个功能卡片设置不同的背景和边框颜色 */
.feature-card:nth-child(1) {
    border-top-color: #3b82f6;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.feature-card:nth-child(2) {
    border-top-color: #10b981;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.feature-card:nth-child(3) {
    border-top-color: #f59e0b;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.feature-card:nth-child(4) {
    border-top-color: #8b5cf6;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.feature-card:nth-child(5) {
    border-top-color: #14b8a6;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.1) 0%, rgba(20, 184, 166, 0.05) 100%);
}

.feature-card:nth-child(6) {
    border-top-color: #ef4444;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
}


.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card > * {
    position: relative;
    z-index: 1;
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: none;
    display: inline-block;
}

/* 为每个功能卡片设置不同的初始图标颜色 */
.feature-card:nth-child(1) .feature-icon {
    color: #3b82f6; /* 蓝色 */
}

.feature-card:nth-child(2) .feature-icon {
    color: #10b981; /* 绿色 */
}

.feature-card:nth-child(3) .feature-icon {
    color: #f59e0b; /* 橙色 */
}

.feature-card:nth-child(4) .feature-icon {
    color: #8b5cf6; /* 紫色 */
}

.feature-card:nth-child(5) .feature-icon {
    color: #14b8a6; /* 青色 */
}

.feature-card:nth-child(6) .feature-icon {
    color: #ef4444; /* 红色 */
}


/* 图标旋转动画 */
@keyframes iconRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 图标摇摆动画 */
@keyframes iconShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 图标脉冲动画 */
@keyframes iconPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* 为不同的功能卡片应用不同的动画和颜色 */
.feature-card:nth-child(1):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconBounce 0.5s ease-out;
}

.feature-card:nth-child(1):hover {
    background: #3b82f6;
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
    border-top-color: #1d4ed8;
}

.feature-card:nth-child(1):hover h3,
.feature-card:nth-child(1):hover p {
    color: #ffffff;
}

.feature-card:nth-child(2):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconShake 0.5s ease-out;
}

.feature-card:nth-child(2):hover {
    background: #10b981;
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.3);
    border-top-color: #059669;
}

.feature-card:nth-child(2):hover h3,
.feature-card:nth-child(2):hover p {
    color: #ffffff;
}

.feature-card:nth-child(3):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconRotate 0.5s ease-out;
}

.feature-card:nth-child(3):hover {
    background: #f59e0b;
    box-shadow: 0 20px 40px rgba(245, 158, 11, 0.3);
    border-top-color: #d97706;
}

.feature-card:nth-child(3):hover h3,
.feature-card:nth-child(3):hover p {
    color: #ffffff;
}

.feature-card:nth-child(4):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconPulse 0.5s ease-out;
}

.feature-card:nth-child(4):hover {
    background: #8b5cf6;
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.3);
    border-top-color: #7c3aed;
}

.feature-card:nth-child(4):hover h3,
.feature-card:nth-child(4):hover p {
    color: #ffffff;
}

.feature-card:nth-child(5):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconFlip 0.5s ease-out;
}

.feature-card:nth-child(5):hover {
    background: #14b8a6;
    box-shadow: 0 20px 40px rgba(20, 184, 166, 0.3);
    border-top-color: #0d9488;
}

.feature-card:nth-child(5):hover h3,
.feature-card:nth-child(5):hover p {
    color: #ffffff;
}

.feature-card:nth-child(6):hover .feature-icon {
    color: #ffffff; /* 白色 */
    animation: iconSwing 0.5s ease-out;
}

.feature-card:nth-child(6):hover {
    background: #ef4444;
    box-shadow: 0 20px 40px rgba(239, 68, 68, 0.3);
    border-top-color: #dc2626;
}

.feature-card:nth-child(6):hover h3,
.feature-card:nth-child(6):hover p {
    color: #ffffff;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    transition: none;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
    transition: none;
}

.feature-highlight {
    font-weight: bold;
    font-size: 1.1rem;
    color: var(--text-dark);
    font-family: 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    display: inline-block;
    margin-bottom: 0.5rem;
}

/* Process Section */
.process {
    background: #f8f9fa;
    padding: 80px 0;
}

.process-step {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 5rem;
}

.process-step.reverse {
    direction: rtl;
}

.process-step.reverse > * {
    direction: ltr;
}

.step-content h3 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.step-number {
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 25px;
    font-size: 1.2rem;
    font-weight: bold;
}

.step-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.step-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 0.2rem;
}

.step-item p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.6;
}

.step-image {
    width: 100%;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

.step-image img {
    max-width: 688px;
    max-height: 502px;
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    object-fit: contain;
}

.step-image .image-placeholder {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    font-size: 3rem;
    color: var(--primary-color);
}

.step-image .image-placeholder p {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: 1rem;
}

/* System Display Section */
.system-display {
    background: #ffffff;
    padding: 80px 0;
}

.system-tabs {
    margin-top: 3rem;
}

.tab-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    background: #f0f4f8;
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

.tab-btn:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 5px 20px rgba(30, 144, 255, 0.3);
}

.tab-btn i {
    font-size: 1.2rem;
}

.tab-content {
    position: relative;
    min-height: 500px;
}

.tab-panel {
    position: absolute;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.tab-panel.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

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

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

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.feature-list i {
    color: var(--primary-color);
    font-size: 1rem;
}

.panel-image {
    width: 100%;
    height: 450px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.panel-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.image-group {
    display: flex;
    gap: 2rem;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
}

.image-group img {
    width: auto;
    max-width: 45%;
    height: 90%;
    object-fit: contain;
}

.panel-image .image-placeholder {
    width: 100%;
    height: 100%;
    background: #f8f9fa;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    font-size: 4rem;
    color: var(--primary-color);
}

.panel-image .image-placeholder p {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: 1rem;
}

/* About Section */
.about {
    background: #f8f9fa;
}

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

.about-text {
    padding: 2rem;
    border-radius: 15px;
    transition: all 0.4s ease;
}

.about-text:hover {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(147, 51, 234, 0.03) 100%);
    transform: translateX(10px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.about-text .lead {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

/* Solutions Section */
.solutions {
    background: #ffffff;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.solution-card {
    background: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: 15px;
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: -100%;
    left: -100%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    transition: all 0.5s ease;
    opacity: 0;
}

.solution-card:hover::before {
    top: -100%;
    left: -100%;
    opacity: 1;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.15);
    background: linear-gradient(to bottom right, #f0f9ff, #e0f2fe);
}

.solution-card > * {
    position: relative;
    z-index: 1;
}

.solution-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    display: inline-block;
}

/* 解决方案图标悬停效果 */
.solution-card:hover .solution-icon {
    transform: translateY(-10px) scale(1.1);
    color: var(--secondary-color);
}

/* 为解决方案卡片应用不同动画 */
.solution-card:nth-child(1):hover .solution-icon {
    animation: iconPulse 0.6s ease-in-out;
}

.solution-card:nth-child(2):hover .solution-icon {
    animation: iconRotate 0.6s ease-in-out;
}

.solution-card:nth-child(3):hover .solution-icon {
    animation: iconShake 0.5s ease-in-out;
}

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

.solution-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.solution-card ul {
    list-style: none;
    padding-left: 0;
}

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

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

/* Cases Section */
.cases {
    background: #f8f9fa;
}

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

.case-card {
    background: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    position: relative;
}

.case-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 0%, rgba(99, 102, 241, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

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

.case-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.2);
    background: linear-gradient(to bottom, #ffffff, #f5f3ff);
}

.case-image .image-placeholder {
    height: 200px;
    border-radius: 0;
    font-size: 3rem;
}

.case-card h3 {
    padding: 1.5rem 1.5rem 0.5rem;
    font-size: 1.2rem;
    color: var(--text-dark);
}

.case-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact Section */
.contact {
    background: #e9ecef;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

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

.info-item {
    display: flex;
    align-items: start;
    gap: 1.5rem;
    padding: 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.info-item:hover {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
    transform: translateX(10px);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 30px;
}

.info-item h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

.contact-form {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.contact-form:hover::before {
    opacity: 1;
}

.contact-form:hover {
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
    transform: translateY(-5px);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #fff;
    color: #333;
    font-family: inherit;
}

.form-group select {
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg width='14' height='8' viewBox='0 0 14 8' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M7 8L0 1.5L1.4 0L7 5.5L12.6 0L14 1.5L7 8Z' fill='%236b7280'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 20px center;
    background-size: 14px;
    padding-right: 45px;
}

.form-group select option {
    padding: 10px;
    background-color: #fff;
    color: #333;
}

.form-group select:hover {
    border-color: #cbd5e1;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background-color: #fff;
}

.form-group input::placeholder,
.form-group select:invalid,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group select:required:invalid {
    color: #9ca3af;
}

/* 验证码样式 */
.captcha-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.captcha-container input {
    flex: 1;
}

#captchaCanvas {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
}

.btn-icon {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--secondary-color);
    transform: rotate(180deg);
}

/* 返回首页浮动按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
    background: linear-gradient(135deg, #0056b3, #003d82);
}

.back-to-top i {
    font-size: 24px;
}

.back-to-top .tooltip {
    position: absolute;
    bottom: 65px;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.back-to-top:hover .tooltip {
    opacity: 1;
}

.back-to-top.show {
    display: flex !important;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: #1a237e;
    color: #ffffff;
    padding: 1.5rem 0;
}

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

.footer h3 {
    color: white;
    margin-bottom: 0.6rem;
    font-size: 1.1rem;
}

.footer h4 {
    color: white;
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

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

.footer-info p {
    margin-bottom: 0.3rem;
    opacity: 0.9;
    font-size: 0.9rem;
    line-height: 1.4;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    line-height: 1.8;
    transition: var(--transition);
}

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

.social-icons {
    display: flex;
    gap: 0.8rem;
}

.social-icons a {
    width: 35px;
    height: 35px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    transition: var(--transition);
    font-size: 0.9rem;
}

.social-icons a:hover {
    background: var(--primary-color);
    color: white;
}

/* 其他图标动画效果 */
.hero-image .image-placeholder i {
    transition: all 0.3s ease;
}

.hero-image .image-placeholder:hover i {
    transform: scale(1.2) rotate(10deg);
    color: var(--secondary-color);
}

/* 统计数字图标动画 */
.stat {
    transition: all 0.3s ease;
    padding: 1rem;
    border-radius: 10px;
    position: relative;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
    border-radius: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.stat:hover::before {
    opacity: 1;
}

.stat:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.5);
}

.stat:hover h3 {
    color: var(--secondary-color);
    transform: scale(1.1);
    transition: all 0.3s ease;
}

/* 案例卡片图标动画 */
.case-image .image-placeholder i {
    transition: all 0.3s ease;
}

.case-card:hover .image-placeholder i {
    transform: scale(1.3) rotate(360deg);
    transition: all 0.6s ease;
}

/* 联系信息图标动画 */
.info-item i {
    transition: all 0.3s ease;
}

.info-item:hover i {
    transform: translateX(10px) scale(1.2);
    color: var(--secondary-color);
}

/* 社交图标动画 */
.social-icons a {
    position: relative;
    overflow: hidden;
}

.social-icons a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.social-icons a:hover::before {
    width: 100%;
    height: 100%;
}

.social-icons a:hover {
    transform: translateY(-3px) rotate(360deg);
    transition: all 0.5s ease;
}

/* 添加弹跳动画 */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* 图标弹跳动画 */
@keyframes iconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* 图标翻转动画 */
@keyframes iconFlip {
    0% { transform: rotateY(0); }
    100% { transform: rotateY(360deg); }
}

/* 图标摇摆动画 */
@keyframes iconSwing {
    0%, 100% { transform: rotate(0deg); }
    20% { transform: rotate(15deg); }
    40% { transform: rotate(-10deg); }
    60% { transform: rotate(5deg); }
    80% { transform: rotate(-5deg); }
}

/* 刷新按钮动画 */
.btn-icon:hover i {
    animation: iconRotate 0.5s ease-in-out;
}

/* 导航链接悬停效果增强 */
.nav-link.active {
    color: var(--primary-color);
}

/* 视频弹窗样式 */
.video-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    align-items: center;
    justify-content: center;
}

.video-modal.show {
    display: flex !important;
    animation: fadeIn 0.3s ease;
}

.video-modal-content {
    background-color: #fff;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideIn 0.3s ease;
}

.video-title {
    padding: 20px 30px 15px;
    margin: 0;
    color: var(--primary-color);
    font-size: 24px;
    border-bottom: 2px solid #f0f0f0;
    text-align: center;
    font-weight: bold;
}

.video-modal-content video {
    width: 100%;
    max-height: calc(90vh - 120px);
    border-radius: 0 0 15px 15px;
    display: block;
}

.video-close {
    position: absolute;
    right: 20px;
    top: 15px;
    color: #999;
    font-size: 35px;
    font-weight: normal;
    cursor: pointer;
    transition: color 0.3s ease;
    z-index: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
}

.video-close:hover,
.video-close:focus {
    color: #ff4444;
    background: #fff;
    transform: rotate(90deg);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-logo {
        height: 40px;
    }
    
    .nav-brand-text h2 {
        font-size: 1.5rem;
    }
    
    .nav-brand-text span {
        font-size: 0.8rem;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .carousel {
        height: 300px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    
    .carousel-control {
        padding: 10px 15px;
        font-size: 1rem;
    }
    
    .carousel-control.prev {
        left: 10px;
    }
    
    .carousel-control.next {
        right: 10px;
    }
    
    .process-step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .process-step.reverse {
        direction: ltr;
    }
    
    .step-image {
        height: auto;
        margin-top: 2rem;
    }
    
    .step-image img {
        max-width: 100%;
        max-height: 400px;
    }
    
    .panel-grid {
        grid-template-columns: 1fr;
    }
    
    .panel-image {
        height: 350px;
        margin-top: 2rem;
    }
    
    .image-group {
        flex-direction: column;
        gap: 1rem;
    }
    
    .image-group img {
        max-width: 70%;
        height: auto;
        max-height: 45%;
    }
    
    .tab-btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}