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

:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --secondary-color: #34a853;
    --accent-color: #ff6b35;
    --dark-color: #1a1a2e;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --bg-gray: #eef2f7;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --border-radius: 12px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

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

ul {
    list-style: none;
}

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

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

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(26, 115, 232, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

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

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

.btn-secondary:hover {
    background: #2d9249;
    transform: translateY(-3px);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    background: var(--white);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    font-weight: bold;
}

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

.logo-text span {
    color: var(--primary-color);
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 18px;
    color: var(--text-color);
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(26, 115, 232, 0.08);
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 12px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

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

.dropdown-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-color);
    font-size: 14px;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.dropdown-item i {
    width: 18px;
    margin-right: 8px;
    text-align: center;
    color: var(--primary-color);
    opacity: 0.8;
}

.dropdown-item:hover i {
    opacity: 1;
}

/* 宽下拉菜单样式 - 用于8个行业解决方案 */
.nav-dropdown-wide {
    min-width: 360px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    padding: 15px;
    gap: 5px;
}

.nav-dropdown-wide .dropdown-item {
    padding: 10px 15px;
    border-radius: 6px;
    white-space: nowrap;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* ==================== 语言切换器 ==================== */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 5px;
    font-size: 14px;
    font-weight: 600;
}

.lang-item {
    color: var(--text-light);
    transition: var(--transition);
    cursor: pointer;
}

.lang-item:hover,
.lang-item.active {
    color: var(--primary-color);
}

.lang-divider {
    width: 1px;
    height: 14px;
    background-color: #ddd;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ==================== Hero 区域 ==================== */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,208C1248,224,1344,192,1392,176L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: bottom;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-content h1 span {
    background: linear-gradient(to right, #ffd700, #ffaa00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 50px;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--white);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 5px;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 20px 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    animation: float 3s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 20%;
    right: -30px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    bottom: 20%;
    left: -30px;
    animation-delay: 1s;
}

.floating-card i {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.floating-card h4 {
    font-size: 16px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.floating-card p {
    font-size: 13px;
    color: var(--text-light);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ==================== 轮播图 ==================== */
.hero-slider {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.slide.active {
    opacity: 1;
}

.slider-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--white);
    transform: scale(1.2);
}

/* ==================== 服务特色区域 ==================== */
.services {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.1), rgba(52, 168, 83, 0.1));
    color: var(--primary-color);
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.1), rgba(52, 168, 83, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon i {
    font-size: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-card h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ==================== 关于我们区域 ==================== */
.about-section {
    padding: 100px 0;
    background: var(--white);
}

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

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.about-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
}

.about-badge .number {
    font-size: 48px;
    font-weight: 800;
}

.about-badge .text {
    font-size: 14px;
}

.about-content h2 {
    font-size: 40px;
    color: var(--dark-color);
    margin-bottom: 25px;
    line-height: 1.3;
}

.about-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 35px;
}

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

.about-feature i {
    width: 24px;
    height: 24px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.about-feature span {
    font-size: 15px;
    color: var(--text-color);
}

/* ==================== 产品服务区域 ==================== */
.products-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--white) 100%);
}

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

.product-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image i {
    font-size: 60px;
    color: rgba(255, 255, 255, 0.9);
}

.product-content {
    padding: 30px;
}

.product-content h3 {
    font-size: 22px;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.product-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-features span {
    padding: 5px 12px;
    background: var(--bg-light);
    color: var(--text-color);
    border-radius: 20px;
    font-size: 12px;
}

/* ==================== 解决方案区域 ==================== */
.solutions-section {
    padding: 100px 0;
    background: var(--dark-color);
    position: relative;
    overflow: hidden;
}

.solutions-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></svg>');
    background-size: 50px 50px;
}

.solutions-section .section-title {
    color: var(--white);
}

.solutions-section .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    position: relative;
    z-index: 1;
}

.solution-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    transition: var(--transition);
}

.solution-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.solution-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.solution-icon i {
    font-size: 32px;
    color: var(--white);
}

.solution-card h3 {
    font-size: 22px;
    color: var(--white);
    margin-bottom: 15px;
}

.solution-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
}

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

/* ==================== 数据统计区域 ==================== */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-card {
    text-align: center;
    color: var(--white);
}

.stat-card .number {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 10px;
}

.stat-card .label {
    font-size: 16px;
    opacity: 0.9;
}

/* ==================== 合作伙伴区域 ==================== */
.partners-section {
    padding: 80px 0;
    background: var(--white);
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 50px;
}

.partner-logo {
    width: 150px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: var(--transition);
}

.partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
}

/* ==================== 新闻区域 ==================== */
.news-section {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.news-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

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

.news-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.news-date {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--white);
    padding: 10px 15px;
    border-radius: 8px;
    text-align: center;
}

.news-date .day {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.news-date .month {
    font-size: 12px;
    color: var(--text-light);
}

.news-content {
    padding: 25px;
}

.news-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-light);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 12px;
}

.news-content h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 10px;
    line-height: 1.5;
}

.news-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== CTA 区域 ==================== */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
}

.cta-content h2 {
    font-size: 42px;
    color: var(--white);
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 25px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.footer-links h4 {
    font-size: 18px;
    margin-bottom: 25px;
    position: relative;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
}

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

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 15px;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 3px;
}

.footer-bottom {
    padding: 25px 0;
    text-align: center;
}

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

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #fff;
    text-decoration: underline;
}

/* ==================== 页面标题区域 ==================== */
.page-header {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-size: 48px;
    color: var(--white);
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

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

/* ==================== 联系表单 ==================== */
.contact-section {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 36px;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item .icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.1), rgba(52, 168, 83, 0.1));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item .icon i {
    font-size: 24px;
    color: var(--primary-color);
}

.contact-item .content h4 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.contact-item .content p {
    color: var(--text-light);
    font-size: 14px;
}

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

.form-group {
    margin-bottom: 25px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--bg-gray);
    border-radius: 10px;
    font-size: 15px;
    transition: var(--transition);
}

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

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ==================== 时间线 ==================== */
.timeline {
    position: relative;
    padding: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--bg-gray);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: calc(50% + 30px);
    position: relative;
    margin-bottom: 50px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: calc(50% + 30px);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--white);
    box-shadow: 0 0 0 4px var(--primary-color);
}

.timeline-content {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 450px;
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content h4 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== 团队区域 ==================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.team-image {
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-image i {
    font-size: 80px;
    color: rgba(255, 255, 255, 0.8);
}

.team-info {
    padding: 25px;
}

.team-info h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.team-info p {
    color: var(--primary-color);
    font-size: 14px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 42px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .products-grid,
    .solutions-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .services-grid,
    .products-grid,
    .solutions-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card .number {
        font-size: 42px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-item::before {
        left: 20px;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: 36px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
}

/* ==================== 动画效果 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ==================== 加载动画 ==================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}