/* ========== 全局重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    color: #1e2a3a;
    background-color: #fff;
    line-height: 1.5;
}

:root {
    --primary: #0a66c2;
    --primary-dark: #004182;
    --gray-light: #f4f7fb;
    --gray-border: #e2e8f0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
}
.logo-text span {
    color: var(--primary);
}
.logo-sub {
    font-size: 12px;
    color: #5a6874;
    letter-spacing: 1px;
}
.nav-menu {
    display: flex;
    gap: 28px;
    list-style: none;
}
.nav-menu a {
    text-decoration: none;
    color: #1e2a3a;
    font-weight: 500;
    transition: color 0.2s;
}
.nav-menu a:hover, .nav-menu a.active {
    color: var(--primary);
}
.mobile-toggle {
    display: none;
    font-size: 28px;
    cursor: pointer;
    background: none;
    border: none;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 10px 24px;
    border-radius: 32px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s;
    border: none;
    cursor: pointer;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: white;
}
.btn:hover {
    background: var(--primary-dark);
}

/* ========== Hero 区域 ========== */
.hero {
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    padding: 80px 0;
}
.hero-grid {
    display: flex;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}
.hero-content {
    flex: 1;
}
.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #0b2b3b;
}
.hero-content .highlight {
    color: var(--primary);
}
.hero-content p {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 32px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.hero-image {
    flex: 1;
    text-align: center;
}
.placeholder-img {
    background: var(--gray-light);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    color: var(--primary);
    font-weight: bold;
}

/* ========== 通用区块 ========== */
section {
    padding: 60px 0;
}
.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 48px;
}
.section-title:after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ========== 卡片网格 ========== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}
.card {
    background: white;
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--gray-border);
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -12px rgba(0,0,0,0.1);
}
.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.card p {
    color: #4a5568;
    margin-bottom: 20px;
}
.card-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

/* ========== 优势列表 ========== */
.advantages {
    background: var(--gray-light);
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    text-align: center;
}
.adv-item {
    font-size: 1.2rem;
    font-weight: 500;
}

/* ========== 公司简介 ========== */
.about-short {
    background: white;
}
.about-flex {
    display: flex;
    gap: 48px;
    align-items: center;
    flex-wrap: wrap;
}
.about-text {
    flex: 2;
}
.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
}
.about-stats {
    flex: 1;
    background: var(--gray-light);
    padding: 28px;
    border-radius: 24px;
}
.about-stats ul {
    list-style: none;
}
.about-stats li {
    margin-bottom: 8px;
}

/* ========== 产品详情页样式 ========== */
.product-detail {
    background: white;
    border-radius: 32px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.08);
    margin-bottom: 48px;
    overflow: hidden;
    border: 1px solid var(--gray-border);
}
.product-inner {
    display: flex;
    flex-wrap: wrap;
}
.product-info {
    flex: 2;
    padding: 40px;
}
.product-info h2 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--primary-dark);
}
.product-tag {
    display: inline-block;
    background: var(--gray-light);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 20px;
}
.product-features {
    margin: 24px 0;
    padding-left: 20px;
}
.product-features li {
    margin-bottom: 10px;
}
.product-specs {
    background: var(--gray-light);
    padding: 20px;
    border-radius: 20px;
    margin: 20px 0;
}
.product-image {
    flex: 1;
    background: linear-gradient(145deg, #eef4ff, #ffffff);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}
.placeholder-img {
    background: white;
    border-radius: 24px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    width: 100%;
}

/* ========== 解决方案页样式 ========== */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}
.scenario-card {
    background: white;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    border: 1px solid var(--gray-border);
    transition: transform 0.2s;
}
.scenario-card:hover {
    transform: translateY(-5px);
}
.card-header {
    background: linear-gradient(135deg, var(--primary), #2b6cb0);
    padding: 32px 24px;
    color: white;
}
.card-header h3 {
    font-size: 1.6rem;
    margin-bottom: 8px;
}
.card-body {
    padding: 24px;
}
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}
.tag {
    background: var(--gray-light);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* ========== 支持页样式 ========== */
.support-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin: 40px 0;
}
.download-list {
    background: var(--gray-light);
    border-radius: 28px;
    padding: 28px;
}
.download-item {
    border-bottom: 1px solid var(--gray-border);
    padding: 16px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.faq-item {
    margin-bottom: 24px;
    border-bottom: 1px solid var(--gray-border);
}
.faq-question {
    font-weight: 700;
    font-size: 1.1rem;
    padding: 16px 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
}
.faq-answer {
    padding-bottom: 20px;
    display: none;
    color: #4b5565;
}
.faq-answer.show {
    display: block;
}
.contact-form {
    background: white;
    border: 1px solid var(--gray-border);
    border-radius: 28px;
    padding: 32px;
    margin: 40px 0;
    width: 100%;
}
.form-group {
    margin-bottom: 20px;
}
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-border);
    border-radius: 12px;
    font-family: inherit;
}

/* ========== 联系页样式 ========== */
.contact-flex {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
    margin: 40px 0;
    width: 100%;
}
.contact-info {
    flex: 1;
    background: var(--gray-light);
    border-radius: 28px;
    padding: 32px;
}
.contact-info h3 {
    margin-bottom: 24px;
}
.info-item {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.contact-form-box {
    flex: 1;
    background: white;
    border: 1px solid var(--gray-border);
    border-radius: 28px;
    padding: 32px;
}
.map-placeholder {
    background: #e2e8f0;
    height: 200px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 32px 0;
    color: #4a5568;
    width: 100%;
}

/* ========== 列表页样式 ========== */
.content-list .list-item {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-border);
}
.list-item h2 {
    margin-bottom: 0.5rem;
}
.list-item .meta {
    color: #6c757d;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}
.detail-article header {
    margin-bottom: 1.5rem;
}
.back-link {
    margin-top: 2rem;
}

/* ========== 页脚 ========== */
footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 40px 0 24px;
    margin-top: 60px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}
.footer-col h4 {
    color: white;
    margin-bottom: 16px;
}
.footer-col a {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
}
.copyright {
    text-align: center;
    border-top: 1px solid #1e2a3a;
    padding-top: 24px;
    font-size: 0.85rem;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 20px;
    }
    .nav-menu.active {
        display: flex;
    }
    .mobile-toggle {
        display: block;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .hero-grid {
        flex-direction: column;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .support-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .contact-flex {
        flex-direction: column;
    }
    .product-info, .product-image {
        flex: 100%;
    }
    .product-info {
        padding: 24px;
    }
}