/* assets/css/style.css */

/* ------------------ 原有内容保留 ------------------ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f5f7fa;
    color: #1a1a1a;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* Header */
header {
    background: #0A2540;
    color: #fff;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 20px;
    font-weight: bold;
}

/* Navigation */
nav {
    background: #0A2540;
}

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

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

.nav-menu a {
    color: #fff;
    font-size: 14px;
    padding: 8px 0;
}

.nav-menu a.active {
    border-bottom: 2px solid #2F80ED;
}

.nav-cta {
    margin-left: auto;
}

.nav-cta a {
    background: #FF8C00;
    padding: 8px 15px;
    border-radius: 4px;
    color: #fff;
}

/* Mobile */
.menu-toggle {
    display: none;
    font-size: 22px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        flex-direction: column;
        display: none;
        width: 100%;
        background: #0A2540;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        margin: 10px 0;
    }

    .nav-cta {
        margin: 10px 0;
    }
}

/* Hero */
.hero {
    background: #0A2540;
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    max-width: 700px;
    margin: auto;
}

/* Sections */
.section {
    padding: 60px 0;
    background: #fff;
    margin-bottom: 20px;
}

.section.dark {
    background: #eef2f7;
}

.section h2 {
    text-align: center;
    margin-bottom: 30px;
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

/* Card */
.card {
    background: #fff;
    border: 1px solid #ddd;
    padding: 20px;
    border-radius: 6px;
    text-align: center;
}

.card img {
    width: auto;
    max-width: 100%;
    height: 200px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    background: #fff;
}

/* Buttons */
.btn {
    display: inline-block;
    background: #2F80ED;
    color: #fff;
    padding: 10px 20px;
    border-radius: 4px;
    margin-top: 10px;
}

/* Footer */
footer {
    background: #0A2540;
    color: #fff;
    padding: 40px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.footer-grid h4 {
    margin-bottom: 10px;
}

.footer-grid ul {
    list-style: none;
}

.footer-grid li {
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-bottom {
    margin-top: 20px;
    text-align: center;
    font-size: 13px;
    border-top: 1px solid #2c3e50;
    padding-top: 15px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ------------------ 全站图片统一 ------------------ */
img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover; /* 默认保持比例并裁剪 */
}

/* 全屏大图模块 */
.full-width-image,
.full-width-hero {
    width: 100%;
    margin: 0;
    padding: 0;
}

.full-width-image img,
.full-width-hero img {
    width: 100%;
    height: 500px; /* 可按需要调整 */
    object-fit: cover;
}

/* 内文展示图 */
.image-box img {
    width: 100%;
    height: auto;
    object-fit: contain; /* 小图完整显示，不拉伸 */
}