/* 顺源隆重 - 企业官网样式 */
/* 风格：简约大气 */

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

:root {
    --primary-color: #1a365d;
    --secondary-color: #2c5282;
    --accent-color: #e53e3e;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

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

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary-color);
}

.nav-logo img {
    height: 45px;
    width: auto;
}

.nav-logo span {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

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

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

/* ========== 首页横幅 ========== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
    position: relative;
    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="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,165.3C1248,171,1344,149,1392,138.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom center no-repeat;
    background-size: cover;
    opacity: 0.1;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

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

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

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

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

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

/* ========== 区块样式 ========== */
.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.section-title p {
    color: var(--text-light);
    font-size: 18px;
    margin-top: 20px;
}

/* ========== 优势特点 ========== */
.features {
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 36px;
    color: white;
}

.feature-card h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
}

/* ========== 产品展示 ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background-color: var(--bg-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 80px;
}

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.product-content p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

/* ========== 关于我们 ========== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.about-text p {
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 120px;
}

/* ========== 数据统计 ========== */
.stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 18px;
    opacity: 0.9;
}

/* ========== 联系我们 ========== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 60px;
    align-items: start;
}

.contact-left h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

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

.contact-info h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

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

.contact-item p {
    color: var(--text-light);
}

/* ========== 拨打CTA ========== */
.cta-call {
    margin-top: 35px;
    padding: 22px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    color: white;
    text-align: center;
}

.cta-call p {
    font-size: 16px;
    margin-bottom: 14px;
    opacity: 0.9;
}

.cta-call-btn {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 12px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-call-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

/* ========== 微信卡片 ========== */
.wechat-card {
    background: var(--bg-light);
    border-radius: 14px;
    padding: 30px 24px;
    text-align: center;
    border: 1px solid var(--border-color);
    position: sticky;
    top: 100px;
}

.wechat-card-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.wechat-card-header h4 {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 600;
}

.wechat-icon {
    font-size: 24px;
}

.wechat-qr {
    width: 180px;
    height: 180px;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    display: block;
    margin: 0 auto;
}

.wechat-hint {
    margin-top: 14px;
    font-size: 14px;
    color: var(--text-light);
}

/* ========== 联系表单 ========== */
.contact-form {
    background-color: var(--bg-light);
    padding: 40px;
    border-radius: 10px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

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

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

/* ========== 页脚 ========== */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 20px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-column p,
.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: var(--shadow);
        padding: 20px 0;
        gap: 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 15px 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
        position: relative;
        padding: 10px;
        margin-right: -10px;
    }

    .nav-toggle span {
        width: 25px;
        height: 3px;
        background-color: var(--text-dark);
        transition: 0.3s;
        display: block;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero h1 {
        font-size: 32px;
    }

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

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

    .section {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-right {
        order: -1;
    }

    .wechat-card {
        position: static;
    }

    .about-image {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 24px;
    }

    .section-title h2 {
        font-size: 24px;
    }

    .feature-card,
    .contact-form {
        padding: 30px 20px;
    }
}