/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 动态背景粒子效果 */
.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.navbar.scrolled .logo {
    color: #333;
}

.logo-icon {
    width: 30px;
    height: 30px;
    margin-right: 18px;
    vertical-align: middle;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.navbar.scrolled .nav-links a {
    color: #333;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #00d4ff;
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* 视频会议工具提示 */
.meeting-tooltip-container {
    position: relative;
    display: inline-block;
    margin-left: 20px;
}

.meeting-trigger {
    font-size: 16px;
    cursor: pointer;
    color: white;
}

.navbar.scrolled .meeting-trigger {
    color: #333;
}

.meeting-popover {
    position: absolute;
    top: 100%;
    left: 0;
    width: 430px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 100;
    display: none;
}

.meeting-header {
    background: #f8f9ff;
    border-left: 4px solid #2e86de;
    padding: 12px 15px;
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 16px;
    color: #2c3e50;
}

.meeting-features {
    margin: 0;
    padding-left: 20px;
    list-style-type: none;
}

.meeting-features li {
    margin-bottom: 8px;
}

.feature-check {
    color: #2e86de;
    font-weight: bold;
    margin-right: 5px;
}

.feature-desc {
    color: lightgray;
}

.highlight-red {
    color: red;
}

.meeting-capabilities {
    background: #f9f9f9;
    border-radius: 6px;
    padding: 12px 15px;
    margin-top: 10px;
    font-size: 14px;
}

.capabilities-header {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}

.capabilities-icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #2e86de;
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    margin-right: 8px;
}

.capabilities-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.tag {
    background: #e8f4ff;
    color: #2c3e50;
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 13px;
}

.meeting-controls {
    margin-top: 30px;
}

.meeting-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 5px;
    font-size: 14px;
}

.error-message {
    font-size: 12px;
    color: red;
    display: none;
}

.meeting-buttons {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.meeting-button {
    flex: 1;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    opacity: 0.5;
    pointer-events: none;
    border: none;
}

.meeting-button.primary {
    background: #2e86de;
    color: white;
}

.meeting-button.secondary {
    background: #f0f0f0;
    color: #333;
    border: 1px solid #ddd;
}

.meeting-button:not(:disabled) {
    opacity: 1;
    pointer-events: auto;
}

/* 主标题区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    background-image: url('bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    color: lightgoldenrodyellow;
    text-shadow: 0 0 5px black, 0 0 10px black, 0 0 15px black;
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.hero p {
    font-size: 1.3rem;
    color: darkblue;
    text-shadow: 0 0 5px white, 0 0 10px white, 0 0 15px white;
    margin-bottom: 3rem;
    max-width: 360px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.3s forwards;
}

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

.cta-button {
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* 业务模块区域 */
.services {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.service-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.service-card p {
    color: #666;
    line-height: 1.6;
}

/* 联系信息区域 */
.contact {
    background: #2c3e50;
    color: white;
    padding: 4rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: center;
}

.contact-info h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: #00d4ff;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.1rem;
}

.contact-text {
    font-size: 1.1rem;
}

.contact-text a {
    color: #00d4ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-text a:hover {
    color: white;
}

/* 页脚 */
.footer {
    background: #1a252f;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .meeting-popover {
        width: 300px;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}