/* style.css 外贸B2B独立站
主色：深蓝 #0f3460，强调橙 #e67e22
修复：a标签默认蓝色、导航链接、询盘按钮，hero无图片纯深蓝 */
:root {
    --primary: #0f3460;
    --primary-light: #164075;
    --accent: #e67e22;
    --accent-dark: #d35400;
    --white: #ffffff;
    --gray-light: #f1f1f1;
    --gray: #cccccc;
    --text-dark: #333333;
}

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

body {
    background-color: var(--primary);
    color: var(--white);
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.6;
}

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

/* 导航栏 */
header {
    background-color: rgba(15, 52, 96, 0.95);
    position: sticky;
    top:0;
    z-index:999;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding:1rem 20px;
}
.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--white);
    text-decoration: none;
}
.logo span {
    color: var(--accent);
}
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.nav-links a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}
.nav-links a:hover {
    color: var(--accent);
}
.lang-switch {
    padding:6px 10px;
    border-radius:4px;
    border:none;
    background: var(--accent);
    color:var(--white);
    cursor:pointer;
}
.mobile-menu-btn {
    display: none;
    background: var(--accent);
    border: none;
    color:var(--white);
    padding:8px 12px;
}

/* Hero首屏区块，纯深蓝无图片 */
.hero {
    height: 85vh;
    display:flex;
    align-items:center;
    text-align:center;
    background: var(--primary);
}
.hero h1 {
    font-size: 2.8rem;
    margin-bottom:1rem;
}
.hero p {
    font-size:1.2rem;
    max-width:900px;
    margin:0 auto 2rem;
}
.btn {
    display: inline-block;
    background: var(--accent);
    color: var(--white);
    padding:14px 30px;
    border-radius:4px;
    text-decoration:none;
    transition: background 0.3s;
    border:none;
    cursor:pointer;
}
.btn:hover {
    background: var(--accent-dark);
}

/* 三大优势区块 */
.features {
    padding:5rem 0;
    background-color: var(--primary-light);
}
.section-title {
    text-align:center;
    font-size:2rem;
    margin-bottom:3rem;
}
.feature-grid {
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap:2rem;
}
.feature-card {
    background:rgba(255,255,255,0.08);
    padding:2rem;
    border-radius:8px;
    text-align:center;
}
.feature-card h3 {
    color:var(--accent);
    margin-bottom:1rem;
    font-size:1.3rem;
}

/* 产品列表 */
.products {
    padding:5rem 0;
}
.product-grid {
    display:grid;
    grid-template-columns: repeat(auto-fill, minmax(280px,1fr));
    gap:2rem;
}
.product-card {
    background: var(--primary-light);
    border-radius:8px;
    overflow:hidden;
}
.product-card img {
    width:100%;
    height:200px;
    object-fit:cover;
}
.product-card .card-body {
    padding:1.2rem;
}
.product-card h3 {
    color:var(--accent);
    margin-bottom:0.6rem;
}

/* 工厂实力板块 */
.factory {
    padding:5rem 0;
    background-color: var(--primary-light);
}

/* 询盘表单 */
.inquiry {
    padding:5rem 0;
}
.form-box {
    max-width:700px;
    margin:0 auto;
    background:rgba(255,255,255,0.08);
    padding:2.5rem;
    border-radius:8px;
}
.form-group {
    margin-bottom:1.2rem;
}
.form-group label {
    display:block;
    margin-bottom:0.5rem;
}
.form-group input,
.form-group textarea,
.form-group select {
    width:100%;
    padding:12px;
    border-radius:4px;
    border:none;
    font-size:1rem;
    color:var(--text-dark);
}
.form-group textarea {
    min-height:140px;
}

/* 页脚 */
footer {
    background:#07203b;
    padding:3rem 0 1.5rem;
    border-top:1px solid rgba(255,255,255,0.1);
}
.footer-wrap {
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
    gap:2rem;
}
.copyright {
    text-align:center;
    margin-top:2.5rem;
    color:var(--gray);
    font-size:0.9rem;
}

/* 全局：清除所有a标签浏览器默认蓝色 */
a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: var(--accent);
}

/* 移动端适配 */
@media (max-width:768px) {
    .nav-links {
        display:none;
    }
    .mobile-menu-btn {
        display:block;
    }
    .hero h1 {
        font-size:2rem;
    }
    .feature-grid {
        grid-template-columns:1fr;
    }
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px,1fr));
    }
}
@media (max-width:480px) {
    .hero {
        height:70vh;
    }
    .hero h1 {
        font-size:1.6rem;
    }
}