/* ============================================
   海晨工业 - HS编码工具完整CSS样式
   ============================================ */

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 导航返回 */
.nav-back {
    text-align: center;
    margin: 2rem 0;
}

.nav-back a {
    display: inline-block;
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-back a:hover {
    color: #2980b9;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #2c3e50 0, #34495e 100%);
    color: #fff;
    padding: 3rem 0;
    text-align: center;
    margin-bottom: 3rem;
}

header nav {
    margin-bottom: 1.5rem;
}

header nav a {
    color: #fff;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

header nav a:hover {
    opacity: 1;
    text-decoration: underline;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* 区块样式 */
section {
    background: #fff;
    padding: 3rem;
    margin-bottom: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,.08);
}

section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    font-weight: 700;
    border-bottom: 3px solid #3498db;
    padding-bottom: 0.5rem;
}

/* 国家信息区块 */
.country-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.country-info p {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.country-info strong {
    color: #2c3e50;
    display: block;
    margin-bottom: 0.3rem;
}

/* 表格样式 */
.hs-codes-table {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

thead {
    background: linear-gradient(135deg, #3498db 0, #2980b9 100%);
    color: #fff;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

th {
    font-weight: 600;
    font-size: 0.95rem;
}

tbody tr:hover {
    background: #f8f9fa;
}

tbody tr:nth-child(even) {
    background: #fafbfc;
}

tbody tr:nth-child(even):hover {
    background: #f8f9fa;
}

table strong {
    color: #3498db;
    font-size: 1.1rem;
}

/* 申报要素列表 */
.declaration ol {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.declaration li {
    padding: 0.8rem 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #27ae60;
    font-weight: 500;
}

/* 页脚样式 */
footer {
    background: #1a252f;
    color: #fff;
    padding: 4rem 0 2rem;
    margin-top: 3rem;
}

.cta-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.cta-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #3498db;
}

.cta-section p {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, #27ae60 0, #2ecc71 100%);
    color: #fff;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(39,174,96,.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(39,174,96,.4);
}

.btn-secondary {
    display: inline-block;
    background: linear-gradient(135deg, #3498db 0, #2980b9 100%);
    color: #fff;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52,152,219,.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52,152,219,.4);
}

.cta-section a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.cta-section a:hover {
    color: #2980b9;
    text-decoration: underline;
}

footer > p {
    text-align: center;
    opacity: 0.8;
    margin-top: 1rem;
}

/* 国家网格和产品网格（首页用） */
.country-grid, .product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.country-grid a, .product-grid a {
    display: block;
    background: linear-gradient(135deg, #3498db 0, #2980b9 100%);
    color: #fff;
    padding: 2rem;
    text-decoration: none;
    border-radius: 15px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52,152,219,.3);
}

.country-grid a:hover, .product-grid a:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(52,152,219,.4);
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    section {
        padding: 2rem 1.5rem;
    }

    section h2 {
        font-size: 1.5rem;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.8rem 0.5rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
    }

    .country-grid, .product-grid {
        grid-template-columns: 1fr;
    }
}