/* ========= 全局 Reset ========= */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

/* ========= 全局基础样式 ========= */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    background-color: #f3f4f6;
    line-height: 1.6;
    color: #111827;
    margin-top: 72px;          /* 预留固定导航高度 */
    font-size: 15px;
}

/* ========= 顶部导航 ========= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #111827;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(15,23,42,0.25);
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.logo {
    font-size: 1rem;
    font-weight: 700;
}

.logo a {
    color: #f9fafb;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
}

/* 顶部导航菜单 */
.nav-menu {
    list-style: none;
    display: flex;
    padding: 0;
    margin: 0;
    gap: 8px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu a {
    display: block;
    padding: 7px 12px;
    font-size: 15px;
    color: #e5e7eb;
    text-decoration: none;
    border-radius: 999px;
    transition: background-color .2s, color .2s;
}

.nav-menu a:hover {
    background-color: rgba(249,250,251,0.1);
    color: #fff;
}

/* 下拉菜单（工具） */
.submenu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    background: #111827;
    padding: 12px;
    border-radius: 12px;
    min-width: 420px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.4);
    z-index: 20;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
}

/* 美国大菜单（兼容你原来的 american-submenu） */
.submenu.american-submenu {
    min-width: 720px;
}

.dropdown.open .submenu {
    display: flex;
}

.dropdown:focus-within .submenu {
    display: flex;
}

.submenu li {
    flex: 1 1 48%;
}

.submenu li a {
    background-color: rgba(31,41,55,0.9);
    font-size: 14px;
    border-radius: 999px;
    padding: 6px 10px;
    text-align: left;
}

.submenu li a:hover {
    background-color: rgba(55,65,81,0.98);
}

/* ========= 语言选择 ========= */
.lang {
    position: relative;
}

.lang-select {
    position: relative;
    display: inline-block;
}

.lang-btn {
    background-color: #f9fafb;
    color: #111827;
    padding: 7px 14px;
    border-radius: 999px;
    border: none;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(15,23,42,0.12);
    transition: background-color .2s, box-shadow .2s, transform .1s;
}

.lang-btn:hover {
    background-color: #e5e7eb;
    box-shadow: 0 3px 10px rgba(15,23,42,0.2);
    transform: translateY(-1px);
}

.lang-btn img.lang-flag-icon {
    width: 18px;
    height: 18px;
}

.lang-content {
    position: absolute;
    top: 120%;
    right: 0;
    background: #f9fafb;
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(15,23,42,0.3);
    padding: 8px 0;
    z-index: 30;
    min-width: 170px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
}

/* 支持 :hover 也支持 .lang-open（兼容旧页和新 JS） */
.lang-select:hover .lang-content,
.lang-content.lang-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-column {
    display: flex;
    flex-direction: column;
}

.lang-content a {
    color: #111827;
    padding: 6px 14px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
}

.lang-content a:hover {
    background-color: #e5e7eb;
}

.lang-content a img.lang-flag-icon {
    width: 18px;
    height: 18px;
}

/* ========= 搜索框 ========= */
.search-box {
    display: flex;
    align-items: center;
    min-width: 230px;
}

.search-box input {
    padding: 9px 10px;
    border-radius: 999px 0 0 999px;
    border: none;
    outline: none;
    font-size: 14px;
    width: 208px;
}

.search-box button {
    padding: 7px 12px;
    border-radius: 0 999px 999px 0;
    border: none;
    font-size: 14px;
    background: #2563eb;
    color: #f9fafb;
    cursor: pointer;
}

.search-box button:hover {
    background: #1d4ed8;
}

/* ========= 左侧浮动按钮（换一组 / TXT） ========= */
.fixed-buttons {
    position: fixed;
    top: 130px;
    right: 16px;
    left: auto;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: stretch;
}

.fixed-buttons button {
    padding: 7px 14px;
    background-color: #2563eb;
    color: #f9fafb;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-size: 14px;
    box-shadow: 0 6px 18px rgba(37,99,235,0.25);
}

.fixed-buttons button:hover {
    background-color: #1d4ed8;
}

/* 右侧广告也包一层“卡片感” */
.fixed-buttons ins.adsbygoogle {
    margin-top: 4px;
    border-radius: 14px;
    border: 1px dashed #e5e7eb;
    background: #ffffff;
    padding: 6px;
}

/* ========= 面包屑 ========= */
.breadcrumb {
    max-width: 1200px;
    margin: 16px auto 4px;
    font-size: 13px;
    color: #6b7280;
    padding: 0 16px;
}

.breadcrumb a {
    color: #111827;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ========= 主体布局：大卡片 + 左右两栏 ========= */
.container {
    max-width: 1200px;
    margin: 24px auto 40px;
    padding: 0 16px;
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 1.1fr);
    gap: 18px;
}

/* 左侧主卡片 */
.main-content {
    background: #ffffff;
    border-radius: 24px;
    box-shadow: 0 18px 45px rgba(15,23,42,0.08);
    padding: 24px 26px 28px;
}

/* 右侧侧栏列 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-left: 0;
}

/* 侧栏菜单改成类似“Region” 卡片 */
.sidebar .left-navigation {
    width: 100%;
    padding: 14px;
    position: static;
    top: auto;
    background: #f9fafb;
    border-radius: 18px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 12px 30px rgba(15,23,42,0.04);
}

/* 侧栏链接样式拉成小 pill */
.sidebar .left-navigation a {
    display: inline-block;
    padding: 5px 9px;
    margin: 4px;
    color: #111827;
    text-decoration: none;
    border-radius: 999px;
    background-color: #ffffff;
    border: 1px solid #e5e7eb;
    font-size: 13px;
    transition: background .2s, border-color .2s, box-shadow .2s, transform .1s;
}

.sidebar .left-navigation a:hover {
    background-color: #eff6ff;
    border-color: #bfdbfe;
    box-shadow: 0 4px 10px rgba(37,99,235,0.12);
    transform: translateX(2px);
}

/* ========= 主卡片内部：标题 + 介绍 + 广告 ========= */
.article-title {
    font-size: 22px;
    color: #111827;
    margin: 0 0 8px;
}

.article-content {
    margin-bottom: 10px;
}

.article-content p {
    font-size: 14px;
    color: #6b7280;
    text-align: justify;
    margin: 0 0 14px;
}

/* 顶部广告区域改成柔和卡片 */
.ad{
    width: 100%;
    max-width: 728px;
    height: auto;
    margin: 10px 0 18px;
    border-radius: 14px;
    border: 1px dashed #e5e7eb;
    background: #f9fafb;
}

/* ========= 输出区：信息表单风格 ========= */
.output-h3 {
    font-size: 16px;
    margin: 14px 0 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #111827;
}

.output-h3 i {
    color: #2563eb;
}

.output-h4 {
    font-size: 15px;
    margin: 16px 0 4px;
}

/* 整体容器 */
.output-container-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 18px;
    margin: 10px 0;
}

/* 带背景那块 */
.output-container-wrapper.output-first,
.output-first {
    background-color: #f9fafb;
    border-radius: 14px;
    padding: 14px 14px 6px;
    margin: 10px 0 !important;
}

/* 单行 */
.output-container {
    flex: 1 1 calc(50% - 20px);
    min-width: 220px;
    display: flex;
    align-items: center;
}

.output-container label {
    display: inline-block;
    width: 100px;
    text-align: right;
    margin-right: 8px;
    font-size: 14px;
    color: #9ea4b1;
}

.output-box {
    display: flex;
    align-items: center;
    flex: 1;
}

.output-box input {
    flex: 1;
    padding: 7px 9px;
    border: 1px solid #e5e7eb;
    border-radius: 9px;
    background-color: #f9fafb;
    font-size: 14px;
    color: #111827;
    box-shadow: 0 1px 0 rgba(15,23,42,0.02);
    margin-right: 0;
}

.output-box input:focus {
    outline: none;
    border-color: #bfdbfe;
    background-color: #ffffff;
}

/* 复制按钮 */
.copy-btn {
    margin-left: 6px;
    background-color: #10b981;
    color: #ecfdf5;
    border: none;
    border-radius: 999px;
    padding: 5px 9px;
    cursor: pointer;
    font-size: 13px;
}

.copy-btn:hover {
    background-color: #059669;
}

.copy-btn i {
    margin-right: 0;
}

/* ========= 下方文章容器 ========= */
.article-container {
    max-width: 1160px;
    margin: 0 auto 40px;
    padding: 18px 20px;
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(15,23,42,0.04);
    font-size: 14px;
    color: #374151;
}

/* ========= footer ========= */
.site-footer {
    background: #111827;
    color: #9ca3af;
    text-align: center;
    padding: 16px 8px;
    font-size: 13px;
    margin-top: 0;
}

.site-link {
    color: #9ca3af;
}

.site-link a {
    color: #e5e7eb;
    text-decoration: none;
}

.site-link a:hover {
    text-decoration: underline;
}

/* ========= loading 遮罩 ========= */
.loading-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(249,250,251,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.spinner {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: 4px solid #e5e7eb;
    border-top-color: #2563eb;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========= 你原来信用卡/批量卡号模块，保持为卡片风格 ========= */
.credit-card-container {
    width: 100%;
    margin: 24px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(15,23,42,0.06);
}

.credit-card-container h1 {
    text-align: center;
    color: #111827;
}

.credit-card-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.credit-card-brand-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.credit-card-brand-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-right: 10px;
}

.credit-card-brand-group input {
    margin-right: 5px;
}

.credit-card-brand-group input[type="radio"] {
    transform: scale(1.2);
}

.credit-card-form label {
    font-weight: bold;
    margin-bottom: 5px;
    display: inline-block;
}

.credit-card-form input[type="number"] {
    padding: 8px;
    width: 100%;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}

.credit-card-button {
    padding: 10px 15px;
    background-color: #2563eb;
    color: #fff;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.credit-card-button:hover {
    background-color: #1d4ed8;
}

.credit-card-button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.credit-card-loading {
    display: none;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    color: #555;
    margin-top: 10px;
}

.credit-card-loading.active {
    display: flex;
}

.credit-card-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.credit-card-table,
.credit-card-table th,
.credit-card-table td {
    border: 1px solid #ddd;
}

.credit-card-table th,
.credit-card-table td {
    padding: 10px;
    text-align: left;
}

.credit-card-table th {
    background-color: #f4f4f4;
    color: #333;
}

.credit-card-brand-group img {
    width: 48px;
    height: 48px;
    margin: -16px 4px;
}

/* 批量卡信息模块 */
.batch-card-info-container {
    width: 100%;
    margin: 24px auto;
}

.batch-card-info-textarea {
    width: 100%;
    height: 150px;
    padding: 10px;
    font-size: 16px;
}

.batch-card-info-button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #2563eb;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
    border-radius: 999px;
}

.batch-card-info-button:disabled {
    background-color: #ccc;
}

.batch-card-info-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.batch-card-info-table,
.batch-card-info-th,
.batch-card-info-td {
    border: 1px solid black;
}

.batch-card-info-th,
.batch-card-info-td {
    padding: 10px;
    text-align: left;
}

.batch-card-info-th {
    background-color: #f2f2f2;
}

.batch-card-info-error {
    color: red;
    margin-top: 10px;
}

#footer-container {
    color: #374151;
    text-align: center;
    padding: 16px 8px;
    font-size: 13px;
    margin-top: 0;
}

/* ========= 响应式 ========= */
@media (max-width: 960px) {
    .container {
        grid-template-columns: minmax(0, 1fr);
    }

    .fixed-buttons {
        top: auto;
        bottom: 16px;
        right: 16px;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-menu {
        width: 100%;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .main-content {
        padding: 18px 14px 22px;
    }

    .output-container {
        flex: 1 1 100%;
    }

    .sidebar .left-navigation a {
        display: block;
        margin: 4px 0;
    }
}