/* ========================================
   道一包装网站样式表
   Daoyi Packaging Website Stylesheet
   ======================================== */

:root {
    --cyan-blue: #2196F3;
    --cyan-blue-dark: #1976D2;
    --yellow-green: #8BC34A;
    --yellow-green-dark: #689F38;
    --warm-orange: #FF9800;
    --warm-orange-dark: #F57C00;
    --light-bg: #f8fafc;
    --dark-text: #1a1a2e;
    --gray-text: #64748b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --section-gradient-1: linear-gradient(135deg, #e3f2fd 0%, #f1f8e9 50%, #fff3e0 100%);
    --section-gradient-2: linear-gradient(180deg, #f8fafc 0%, #e0f2fe 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.7;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========================================
   导航栏 / Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 2rem;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark-text);
    text-decoration: none;
}

.nav-logo img {
    height: 40px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--gray-text);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--cyan-blue);
    transition: width 0.3s;
}

.nav-links a:hover {
    color: var(--cyan-blue);
}

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

.nav-links a.active {
    color: var(--cyan-blue);
}

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

.language-toggle {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
}

.language-toggle a {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    text-decoration: none;
    color: var(--gray-text);
    transition: all 0.3s;
}

.language-toggle a.active {
    background: var(--cyan-blue);
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-text);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--section-gradient-1);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.1) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 152, 0, 0.1) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

.hero-content {
    text-align: center;
    z-index: 1;
    padding: 2rem;
}

.hero-logo {
    width: 150px;
    height: 150px;
    margin-bottom: 2rem;
    animation: bounceIn 1s ease-out;
}

@keyframes bounceIn {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyan-blue), var(--yellow-green), var(--warm-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    animation: slideUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--gray-text);
    margin-bottom: 2rem;
    animation: slideUp 0.8s ease-out 0.2s both;
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--gray-text);
    max-width: 600px;
    margin: 0 auto 2rem;
    animation: slideUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 0.8s ease-out 0.6s both;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyan-blue), var(--cyan-blue-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.5);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--yellow-green), var(--yellow-green-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(139, 195, 74, 0.4);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 195, 74, 0.5);
}

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

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
    padding: 6rem 2rem;
}

.section-white {
    background: white;
}

.section-light {
    background: var(--section-gradient-2);
}

.section-gradient {
    background: var(--section-gradient-1);
}

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

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

.section-title p {
    color: var(--gray-text);
    font-size: 1.1rem;
}

.section-title .en {
    font-size: 0.875rem;
    color: var(--cyan-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    display: block;
}

/* ========================================
   关于卡片
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.about-card:nth-child(1) .about-icon {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(33, 150, 243, 0.2));
    color: var(--cyan-blue);
}

.about-card:nth-child(2) .about-icon {
    background: linear-gradient(135deg, rgba(139, 195, 74, 0.1), rgba(139, 195, 74, 0.2));
    color: var(--yellow-green);
}

.about-card:nth-child(3) .about-icon {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1), rgba(255, 152, 0, 0.2));
    color: var(--warm-orange);
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--dark-text);
}

.about-card p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ========================================
   产品展示
   ======================================== */
.products-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
}

.product-card:hover {
    border-color: var(--cyan-blue);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.product-card:nth-child(1) .product-icon {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(33, 150, 243, 0.2));
}

.product-card:nth-child(2) .product-icon {
    background: linear-gradient(135deg, rgba(139, 195, 74, 0.1), rgba(139, 195, 74, 0.2));
}

.product-card:nth-child(3) .product-icon {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1), rgba(255, 152, 0, 0.2));
}

.product-card:nth-child(4) .product-icon {
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.1), rgba(156, 39, 176, 0.2));
}

.product-card h3 {
    color: var(--dark-text);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.product-card p {
    color: var(--gray-text);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.product-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.product-tag {
    background: var(--light-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--gray-text);
}

/* ========================================
   数据亮点
   ======================================== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 3rem auto 0;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyan-blue), var(--yellow-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--gray-text);
    font-size: 1rem;
    margin-top: 0.5rem;
}

/* ========================================
   特色区块
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--cyan-blue);
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card:nth-child(1) .feature-icon {
    background: rgba(33, 150, 243, 0.1);
    color: var(--cyan-blue);
}

.feature-card:nth-child(2) .feature-icon {
    background: rgba(139, 195, 74, 0.1);
    color: var(--yellow-green);
}

.feature-card:nth-child(3) .feature-icon {
    background: rgba(255, 152, 0, 0.1);
    color: var(--warm-orange);
}

.feature-card h3 {
    color: var(--dark-text);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ========================================
   公众号入口
   ======================================== */
.social-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.social-card {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 24px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    display: block;
}

.social-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.social-card.wechat {
    border: 3px solid #07C160;
}

.social-card.wechat .social-icon {
    background: linear-gradient(135deg, #07C160, #06ad56);
}

.social-card.video {
    border: 3px solid #FF0000;
}

.social-card.video .social-icon {
    background: linear-gradient(135deg, #FF0000, #cc0000);
}

.social-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2.5rem;
}

.social-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

.social-card p {
    color: var(--gray-text);
    margin-bottom: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--cyan-blue);
    font-weight: 600;
}

/* ========================================
   联系方式
   ======================================== */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

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

.contact-item {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
}

.contact-item:nth-child(1) .contact-icon {
    background: rgba(33, 150, 243, 0.1);
    color: var(--cyan-blue);
}

.contact-item:nth-child(2) .contact-icon {
    background: rgba(139, 195, 74, 0.1);
    color: var(--yellow-green);
}

.contact-item:nth-child(3) .contact-icon {
    background: rgba(255, 152, 0, 0.1);
    color: var(--warm-orange);
}

.contact-item h4 {
    font-size: 1rem;
    color: var(--gray-text);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-item p {
    font-size: 1.1rem;
    color: var(--dark-text);
    font-weight: 600;
}

/* ========================================
   表单样式
   ======================================== */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

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

/* ========================================
   面包屑导航
   ======================================== */
.breadcrumb {
    padding: 1rem 0;
    margin-top: 80px;
    background: var(--light-bg);
}

.breadcrumb-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    gap: 0.5rem;
    list-style: none;
    font-size: 0.875rem;
}

.breadcrumb-list a {
    color: var(--gray-text);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb-list a:hover {
    color: var(--cyan-blue);
}

.breadcrumb-list span {
    color: var(--gray-text);
}

.breadcrumb-list .current {
    color: var(--dark-text);
}

/* ========================================
   页面内容区
   ======================================== */
.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.content-block {
    margin-bottom: 3rem;
}

.content-block h2 {
    font-size: 1.75rem;
    color: var(--dark-text);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.content-block h3 {
    font-size: 1.25rem;
    color: var(--dark-text);
    margin: 1.5rem 0 0.75rem;
}

.content-block p {
    color: var(--gray-text);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-block ul,
.content-block ol {
    margin: 1rem 0 1rem 1.5rem;
    color: var(--gray-text);
}

.content-block li {
    margin-bottom: 0.5rem;
}

/* ========================================
   新闻列表
   ======================================== */
.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.news-item:hover {
    transform: translateX(10px);
    border-color: var(--cyan-blue);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.news-date {
    font-size: 0.875rem;
    color: var(--cyan-blue);
    margin-bottom: 0.5rem;
}

.news-item h3 {
    font-size: 1.25rem;
    color: var(--dark-text);
    margin-bottom: 0.75rem;
}

.news-item h3 a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s;
}

.news-item h3 a:hover {
    color: var(--cyan-blue);
}

.news-item p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

.news-tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.news-tag {
    background: var(--light-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--gray-text);
}

/* ========================================
   时间轴
   ======================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--cyan-blue), var(--yellow-green), var(--warm-orange));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--cyan-blue);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--cyan-blue);
}

.timeline-year {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cyan-blue);
    margin-bottom: 0.5rem;
}

.timeline-content {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.timeline-content h3 {
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ========================================
   底部
   ======================================== */
.footer {
    background: var(--dark-text);
    color: white;
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--cyan-blue);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo img {
    height: 40px;
}

.footer-logo span {
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-links {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

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

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

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

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

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

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

    .stat-number {
        font-size: 2rem;
    }

    .section {
        padding: 4rem 1rem;
    }

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

/* ========================================
   辅助类
   ======================================== */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.highlight {
    color: var(--cyan-blue);
}

/* ========================================
   解决方案页面专用
   ======================================== */
.solution-detail {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.solution-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}

.solution-detail:nth-child(1) .solution-icon {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(33, 150, 243, 0.2));
}

.solution-detail:nth-child(2) .solution-icon {
    background: linear-gradient(135deg, rgba(139, 195, 74, 0.1), rgba(139, 195, 74, 0.2));
}

.solution-detail:nth-child(3) .solution-icon {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1), rgba(255, 152, 0, 0.2));
}

.solution-detail:nth-child(4) .solution-icon {
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.1), rgba(156, 39, 176, 0.2));
}

.solution-title h3 {
    font-size: 1.5rem;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.solution-title p {
    color: var(--gray-text);
    font-size: 1rem;
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.solution-feature {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.solution-feature-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.solution-detail:nth-child(1) .solution-feature-icon {
    background: rgba(33, 150, 243, 0.1);
    color: var(--cyan-blue);
}

.solution-detail:nth-child(2) .solution-feature-icon {
    background: rgba(139, 195, 74, 0.1);
    color: var(--yellow-green);
}

.solution-detail:nth-child(3) .solution-feature-icon {
    background: rgba(255, 152, 0, 0.1);
    color: var(--warm-orange);
}

.solution-detail:nth-child(4) .solution-feature-icon {
    background: rgba(156, 39, 176, 0.1);
    color: #9C27B0;
}

.solution-feature span {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ========================================
   产品详情页样式
   ======================================== */
.product-section {
    margin-bottom: 4rem;
}

.product-section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.product-section-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.product-section:nth-child(1) .product-section-icon {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(33, 150, 243, 0.2));
    color: var(--cyan-blue);
}

.product-section:nth-child(2) .product-section-icon {
    background: linear-gradient(135deg, rgba(139, 195, 74, 0.1), rgba(139, 195, 74, 0.2));
    color: var(--yellow-green);
}

.product-section:nth-child(3) .product-section-icon {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1), rgba(255, 152, 0, 0.2));
    color: var(--warm-orange);
}

.product-section:nth-child(4) .product-section-icon {
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.1), rgba(156, 39, 176, 0.2));
    color: #9C27B0;
}

.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.product-list-item {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.product-list-item:hover {
    border-color: var(--cyan-blue);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.product-list-item h4 {
    color: var(--dark-text);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.product-list-item p {
    color: var(--gray-text);
    font-size: 0.9rem;
}