/* ========================================
   海南鱼人网络科技有限公司 - 官方网站样式
   ======================================== */

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066CC;
    --primary-dark: #0052a3;
    --primary-light: #e6f0ff;
    --secondary-color: #00b894;
    --accent-color: #6c5ce7;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #fcfcfc;
    --border-color: #e8e8e8;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 6px;
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* 首页横幅 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    z-index: -1;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 184, 148, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(108, 92, 231, 0.05) 0%, transparent 50%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title-main {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-title-sub {
    display: block;
    font-size: 24px;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

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

.hero-visual {
    flex: 1;
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 20px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 40%;
    right: 5%;
    animation-delay: 0.5s;
}

.floating-card.card-3 {
    bottom: 15%;
    left: 5%;
    animation-delay: 1s;
}

.floating-card.card-4 {
    bottom: 5%;
    right: 20%;
    animation-delay: 1.5s;
}

.card-icon {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

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

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    margin: 8px auto 0;
    border-right: 2px solid var(--text-light);
    border-bottom: 2px solid var(--text-light);
    transform: rotate(45deg);
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
    0% {
        opacity: 0;
        transform: rotate(45deg) translate(-10px, -10px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: rotate(45deg) translate(10px, 10px);
    }
}

/* 区块通用样式 */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

/* 关于我们 */
.about {
    background-color: var(--bg-white);
}

.about-content {
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.about-info {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.info-card {
    display: flex;
    gap: 16px;
    padding: 24px;
    background-color: var(--bg-light);
    border-radius: 12px;
    transition: var(--transition);
}

.info-card:hover {
    background-color: var(--primary-light);
    transform: translateY(-4px);
}

.info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border-radius: 10px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-icon svg {
    width: 24px;
    height: 24px;
}

.info-content h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 4px;
}

.info-content p {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.5;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

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

/* 业务范围 */
.services {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background-color: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    border-radius: 12px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-features {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.service-features li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.service-features li::before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--primary-color);
}

.service-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: #ff6b6b;
    color: white;
    font-size: 12px;
    border-radius: 12px;
    margin-top: 8px;
}

/* 产品中心 */
.products {
    background-color: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background-color: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.product-image {
    height: 180px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 产品1 - 企业智能管理系统 - 蓝紫渐变 */
.product-image-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 产品2 - AI客服系统 - 蓝绿渐变 */
.product-image-2 {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

/* 产品3 - 数据分析平台 - 深蓝渐变 */
.product-image-3 {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

/* 产品4 - 安全防护系统 - 红橙渐变 */
.product-image-4 {
    background: linear-gradient(135deg, #f85032 0%, #e73827 100%);
}

/* 产品5 - 物联网平台 - 青蓝渐变 */
.product-image-5 {
    background: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
}

/* 产品6 - 数字孪生平台 - 深紫渐变 */
.product-image-6 {
    background: linear-gradient(135deg, #5b247a 0%, #1bcedf 100%);
}

.product-visual {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* 企业智能管理系统卡片样式 */
.visual-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.visual-card .card-header {
    height: 12px;
    background: #e8e8e8;
    border-radius: 10px 10px 0 0;
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 4px;
}

.visual-card .card-header::before,
.visual-card .card-header::after {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ccc;
}

.visual-card.card-sm {
    width: 70px;
    height: 50px;
    top: 25%;
    left: 10%;
    transform: rotate(-8deg);
}

.visual-card.card-md {
    width: 85px;
    height: 60px;
    bottom: 20%;
    left: 20%;
    transform: rotate(5deg);
}

.visual-card.card-lg {
    width: 110px;
    height: 75px;
    top: 20%;
    right: 15%;
    transform: rotate(-5deg);
}

.visual-card .card-body {
    padding: 8px;
}

.visual-card .card-line {
    height: 6px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 3px;
    margin-bottom: 6px;
}

.visual-card .card-line.short {
    width: 60%;
}

.visual-card .card-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 30px;
}

.chart-bar {
    width: 12px;
    background: linear-gradient(180deg, #667eea, #764ba2);
    border-radius: 3px 3px 0 0;
}

.chart-bar.bar-1 { height: 12px; }
.chart-bar.bar-2 { height: 20px; }
.chart-bar.bar-3 { height: 16px; }
.chart-bar.bar-4 { height: 24px; }

.visual-card .card-circle {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: conic-gradient(#667eea 0%, #764ba2 70%, #e8e8e8 70%);
    margin: 0 auto;
}

/* AI客服系统样式 */
.chat-bubble {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 12px 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.chat-bubble.bubble-left {
    width: 90px;
    height: 40px;
    top: 25%;
    left: 10%;
    border-radius: 16px 16px 16px 4px;
}

.chat-bubble.bubble-right {
    width: 110px;
    height: 50px;
    top: 45%;
    right: 10%;
    border-radius: 16px 16px 4px 16px;
}

.bubble-dots {
    display: flex;
    gap: 6px;
    align-items: center;
    height: 100%;
}

.bubble-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #11998e;
    animation: bounce 1.4s infinite ease-in-out;
}

.bubble-dots span:nth-child(1) { animation-delay: 0s; }
.bubble-dots span:nth-child(2) { animation-delay: 0.2s; }
.bubble-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-6px); }
}

.bubble-text {
    height: 6px;
    background: linear-gradient(90deg, #11998e, #38ef7d);
    border-radius: 3px;
    margin-bottom: 6px;
}

.bubble-text.short {
    width: 70%;
}

.chat-ai {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.ai-icon {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #11998e, #38ef7d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.chat-waves {
    position: absolute;
    bottom: 20%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 4px;
}

.chat-waves span {
    width: 4px;
    height: 16px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: wave 1s infinite ease-in-out;
}

.chat-waves span:nth-child(1) { animation-delay: 0s; }
.chat-waves span:nth-child(2) { animation-delay: 0.1s; }
.chat-waves span:nth-child(3) { animation-delay: 0.2s; }
.chat-waves span:nth-child(4) { animation-delay: 0.3s; }

@keyframes wave {
    0%, 100% { height: 8px; }
    50% { height: 20px; }
}

/* 数据分析平台样式 */
.data-screen {
    width: 140px;
    height: 100px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.screen-header {
    height: 20px;
    background: #1e3c72;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.screen-header span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
}

.screen-content {
    padding: 12px;
    height: calc(100% - 20px);
}

.data-graph svg {
    width: 100%;
    height: 45px;
}

.data-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 8px;
}

.stat-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    position: relative;
}

.stat-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

/* 安全防护系统样式 */
.shield {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 35px 35px 10px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.shield-inner svg {
    width: 36px;
    height: 36px;
    stroke: #f85032;
}

.shield-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px dashed rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    animation: spin 20s linear infinite;
}

.shield-ring.ring-1 {
    width: 110px;
    height: 110px;
}

.shield-ring.ring-2 {
    width: 140px;
    height: 140px;
    animation-direction: reverse;
}

@keyframes spin {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.shield-particles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 160px;
}

.shield-particles span {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
}

.shield-particles span:nth-child(1) { top: 0; left: 50%; }
.shield-particles span:nth-child(2) { top: 50%; right: 0; }
.shield-particles span:nth-child(3) { bottom: 0; left: 50%; }
.shield-particles span:nth-child(4) { top: 50%; left: 0; }

/* 物联网平台样式 */
.iot-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.iot-hub {
    width: 35px;
    height: 35px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    position: relative;
}

.iot-hub::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, #00d2ff, #3a7bd5);
    border-radius: 50%;
}

.iot-node {
    position: absolute;
    top: 50%;
    left: 50%;
}

.node-dot {
    width: 18px;
    height: 18px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.node-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, #00d2ff, #3a7bd5);
    border-radius: 50%;
}

.node-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, rgba(0, 210, 255, 0.6), transparent);
}

.iot-node.node-1 { transform: rotate(0deg) translateY(-50px); }
.iot-node.node-1 .node-line { width: 32px; right: 100%; top: 50%; }

.iot-node.node-2 { transform: rotate(60deg) translateY(-50px); }
.iot-node.node-2 .node-line { width: 32px; right: 100%; top: 50%; }

.iot-node.node-3 { transform: rotate(120deg) translateY(-50px); }
.iot-node.node-3 .node-line { width: 32px; right: 100%; top: 50%; }

.iot-node.node-4 { transform: rotate(180deg) translateY(-50px); }
.iot-node.node-4 .node-line { width: 32px; right: 100%; top: 50%; }

.iot-node.node-5 { transform: rotate(240deg) translateY(-50px); }
.iot-node.node-5 .node-line { width: 32px; right: 100%; top: 50%; }

.iot-node.node-6 { transform: rotate(300deg) translateY(-50px); }
.iot-node.node-6 .node-line { width: 32px; right: 100%; top: 50%; }

/* 数字孪生平台样式 */
.digital-twin {
    position: absolute;
    bottom: 30%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.twin-building {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 4px 4px 0 0;
    position: relative;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.twin-building.building-1 {
    width: 25px;
    height: 60px;
}

.twin-building.building-1::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 15px;
    height: 15px;
    background: linear-gradient(135deg, #5b247a, #1bcedf);
    border-radius: 2px;
}

.twin-building.building-1::after {
    content: '';
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 15px;
    height: 15px;
    background: linear-gradient(135deg, #5b247a, #1bcedf);
    border-radius: 2px;
}

.twin-building.building-2 {
    width: 35px;
    height: 80px;
}

.twin-building.building-2::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 12px;
    background: linear-gradient(135deg, #5b247a, #1bcedf);
    border-radius: 2px;
}

.twin-building.building-2::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 5px;
    width: 8px;
    height: 8px;
    background: rgba(91, 36, 122, 0.3);
    border-radius: 50%;
    box-shadow: 0 12px 0 rgba(91, 36, 122, 0.3), 0 24px 0 rgba(91, 36, 122, 0.3);
}

.twin-building.building-3 {
    width: 30px;
    height: 55px;
}

.twin-building.building-3::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #5b247a, #1bcedf);
    border-radius: 2px;
}

.connection-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.6), transparent);
    transform-origin: left center;
    animation: pulse 2s ease-in-out infinite;
}

.connection-line.line-1 {
    width: 40px;
    top: 35%;
    left: 25%;
    transform: rotate(-20deg);
}

.connection-line.line-2 {
    width: 50px;
    top: 30%;
    left: 45%;
    transform: rotate(10deg);
    animation-delay: 0.5s;
}

.connection-line.line-3 {
    width: 35px;
    top: 40%;
    right: 25%;
    transform: rotate(30deg);
    animation-delay: 1s;
}

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

.data-point {
    position: absolute;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    animation: float 3s ease-in-out infinite;
}

.data-point span {
    width: 10px;
    height: 10px;
    background: linear-gradient(135deg, #5b247a, #1bcedf);
    border-radius: 50%;
}

.data-point.point-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.data-point.point-2 {
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0.5s;
}

.data-point.point-3 {
    top: 20%;
    right: 20%;
    animation-delay: 1s;
}

.product-content {
    padding: 24px;
}

.product-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.product-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-link {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 14px;
}

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

/* 核心优势 */
.advantage {
    background-color: var(--bg-light);
}

.advantage-content {
    display: flex;
    gap: 80px;
    align-items: center;
}

.advantage-list {
    flex: 1;
}

.advantage-item {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
}

.advantage-number {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    font-size: 20px;
    font-weight: 700;
    border-radius: 12px;
    flex-shrink: 0;
}

.advantage-info h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.advantage-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.advantage-circle {
    position: relative;
    width: 400px;
    height: 400px;
}

.circle-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
}

.circle-item {
    position: absolute;
    width: 100px;
    height: 100px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.circle-item:hover {
    transform: scale(1.1);
}

.circle-1 {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.circle-2 {
    top: 25%;
    right: 0;
}

.circle-3 {
    bottom: 25%;
    right: 0;
}

.circle-4 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.circle-5 {
    top: 25%;
    left: 0;
}

.circle-icon {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-color);
}

.circle-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 合作流程 */
.process {
    background-color: var(--bg-white);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    border-radius: 50%;
    color: var(--primary-color);
    transition: var(--transition);
}

.process-step:hover .step-icon {
    background-color: var(--primary-color);
    color: white;
}

.step-icon svg {
    width: 36px;
    height: 36px;
}

.step-number {
    position: absolute;
    top: 0;
    right: 20%;
    width: 28px;
    height: 28px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.process-step h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 联系我们 */
.contact {
    background-color: var(--bg-light);
}

.contact-content {
    display: flex;
    gap: 60px;
}

.contact-info {
    flex: 1;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    border-radius: 12px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
}

.contact-details h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contact-details p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-form-wrapper {
    flex: 1;
}

.contact-form {
    background-color: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.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 var(--primary-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background-color: #1a1a1a;
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: white;
    display: inline-block;
    margin-bottom: 16px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    font-size: 14px;
}

.footer-section h4 {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 12px;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
}

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

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-4px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title-main {
        font-size: 40px;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        width: 100%;
        height: 400px;
    }

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

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

    .about-content {
        flex-direction: column;
    }

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

    .advantage-content {
        flex-direction: column;
    }

    .advantage-circle {
        width: 320px;
        height: 320px;
    }

    .contact-content {
        flex-direction: column;
    }

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

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    section {
        padding: 60px 0;
    }

    .hero-title-main {
        font-size: 32px;
    }

    .hero-title-sub {
        font-size: 18px;
    }

    .hero-description {
        font-size: 16px;
    }

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

    .hero-visual {
        height: 300px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-description {
        font-size: 16px;
    }

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

    .about-info {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .stat-item {
        flex: 1;
        min-width: 80px;
    }

    .process-steps {
        flex-wrap: wrap;
    }

    .process-step {
        flex: 1 1 calc(50% - 20px);
        min-width: 140px;
    }

    .advantage-circle {
        width: 260px;
        height: 260px;
    }

    .circle-center {
        width: 80px;
        height: 80px;
    }

    .circle-item {
        width: 70px;
        height: 70px;
    }

    .circle-icon {
        font-size: 12px;
    }

    .circle-label {
        font-size: 10px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .contact-form {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .hero-title-main {
        font-size: 28px;
    }

    .hero-title-sub {
        font-size: 16px;
    }

    .hero-description {
        font-size: 14px;
    }

    .btn {
        padding: 10px 24px;
        font-size: 14px;
    }

    .service-card,
    .product-content {
        padding: 20px;
    }

    .process-step {
        flex: 1 1 100%;
    }
}