/* ==========================================
   象速科技企业网站样式表
   ========================================== */

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

:root {
    --primary-color: #0066FF;
    --secondary-color: #00CCFF;
    --dark-color: #1a1a1a;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ==========================================
   导航栏
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-color);
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ==========================================
   页面标题
   ========================================== */

.page-header {
    padding: 120px 0 60px;
    text-align: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05), rgba(0, 204, 255, 0.05));
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ==========================================
   Hero区域
   ========================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.03), rgba(0, 204, 255, 0.03));
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 204, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   按钮
   ========================================== */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

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

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

.btn-white {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
    display: block;
}

/* ==========================================
   Section通用样式
   ========================================== */

section {
    padding: 80px 0;
}

.bg-light {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
}

.text-center {
    text-align: center;
    margin-top: 3rem;
}

/* ==========================================
   优势卡片
   ========================================== */

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-card {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ==========================================
   服务卡片
   ========================================== */

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

.service-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.service-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.service-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 204, 255, 0.1));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.service-category h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
}

.service-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.service-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.service-list li:last-child {
    border-bottom: none;
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.service-link:hover {
    transform: translateX(5px);
}

/* ==========================================
   案例卡片
   ========================================== */

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.case-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-info {
    padding: 1.5rem;
}

.case-info h3 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.case-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.case-link {
    color: var(--primary-color);
    font-weight: 600;
    transition: all 0.3s ease;
}

.case-link:hover {
    transform: translateX(5px);
}

/* ==========================================
   CTA区域
   ========================================== */

.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-align: center;
    padding: 80px 0;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a,
.footer-contact li {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

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

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================
   产品服务页面
   ========================================== */

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

.product-detail-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.product-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-detail-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 204, 255, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.product-detail-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
    text-align: center;
}

.product-detail-desc {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    margin-bottom: 2rem;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
}

.product-detail-card .btn {
    width: 100%;
}

.ecommerce-grid,
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.ecommerce-card,
.tool-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
}

.ecommerce-card:hover,
.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.ecommerce-icon,
.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.ecommerce-card h3,
.tool-card h3 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.ecommerce-card p,
.tool-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.875rem;
}

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

.website-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.website-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.website-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.website-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.website-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.website-features {
    list-style: none;
}

.website-features li {
    padding: 0.5rem 0;
    color: var(--text-light);
}

/* ==========================================
   成功案例页面
   ========================================== */

.cases-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

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

.case-item.reverse {
    direction: rtl;
}

.case-item.reverse > * {
    direction: ltr;
}

.case-image-large img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.case-content h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

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

.case-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.highlight-item h4 {
    font-size: 1.125rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.highlight-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ==========================================
   关于我们页面
   ========================================== */

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

.about-intro-text h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.intro-subtitle {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.intro-desc {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-intro-image img {
    width: 100%;
    border-radius: 12px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    text-align: center;
    padding: 2rem;
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-marker {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    box-shadow: 0 0 0 4px var(--white), 0 0 0 6px var(--primary-color);
}

.timeline-content {
    width: calc(50% - 40px);
    background: var(--white);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.team-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-box {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 1.125rem;
}

.team-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-box {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.advantage-box h3 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.advantage-box p {
    color: var(--text-light);
    line-height: 1.8;
}

.honor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.honor-card {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.honor-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.honor-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.honor-card h4 {
    color: var(--dark-color);
    font-size: 1.125rem;
}

/* ==========================================
   联系我们页面
   ========================================== */

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-info-card {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.contact-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-info-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 204, 255, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.contact-info-card h3 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.contact-info-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.contact-form-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form-intro h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

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

.contact-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.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(0, 102, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.map-placeholder {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.map-content {
    width: 100%;
}

/* ==========================================
   响应式设计
   ========================================== */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .case-item,
    .case-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .website-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-intro-content {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-marker {
        left: 20px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: auto !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid,
    .product-detail-grid,
    .website-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ==========================================
   动画效果
   ========================================== */

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ==========================================
   案例详情页
   ========================================== */

.case-detail-section {
    padding: 60px 0;
}

.case-detail-content {
    max-width: 900px;
    margin: 0 auto;
}

.detail-summary {
    margin-bottom: 3rem;
}

.detail-summary h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.detail-summary p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.125rem;
}

.detail-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.info-card h4 {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-card p {
    font-size: 1.125rem;
    color: var(--dark-color);
    font-weight: 600;
}

.detail-section {
    margin-bottom: 3rem;
}

.detail-section h2 {
    font-size: 1.75rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

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

.challenges-list,
.results-list {
    list-style: none;
    display: grid;
    gap: 1rem;
}

.challenges-list li,
.results-list li {
    padding: 1rem 1rem 1rem 3rem;
    background: var(--bg-light);
    border-radius: 8px;
    position: relative;
    color: var(--text-color);
    line-height: 1.6;
}

.challenges-list li::before {
    content: '⚠️';
    position: absolute;
    left: 1rem;
    font-size: 1.25rem;
}

.results-list li::before {
    content: '✓';
    position: absolute;
    left: 1rem;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.solution-content {
    color: var(--text-light);
    line-height: 1.8;
}

.solution-content p {
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

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

.case-image-item {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.case-image-item img {
    width: 100%;
    height: auto;
}

.detail-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid var(--border-color);
}

@media (max-width: 768px) {
    .detail-actions {
        flex-direction: column;
    }
    
    .detail-actions .btn {
        width: 100%;
    }
}