/* ===== 极简重置 & 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7fa;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    width: 100%;
}

/* ===== 网站标题 ===== */
.site-title {
    text-align: center;
    font-size: 30px;
    font-weight: 600;
    color: #0a1a2b;                 /* 加深 → 对比度 > 9:1 */
    letter-spacing: 1px;
    padding-bottom: 16px;
    margin-bottom: 0;
    border-bottom: 2px solid #e2e8f0;
    position: relative;
}

.site-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: #3b82f6;
    border-radius: 2px;
}

/* ===== 网站描述 ===== */
.site-description-wrap {
    text-align: center;
    padding: 18px 20px 22px;
    margin-bottom: 28px;
    background: linear-gradient(to right, #f8fafc, #ffffff, #f8fafc);
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
    position: relative;
}

.site-description-wrap::before {
    content: '✦';
    display: block;
    font-size: 18px;
    color: #3b82f6;
    opacity: 0.6;
    letter-spacing: 4px;
    margin-bottom: 6px;
}

.site-description {
    font-size: 16px;
    color: #1a2a3a;                 /* 加深 → 对比度约 7.5:1 */
    letter-spacing: 0.5px;
    line-height: 1.7;
    font-weight: 400;
    margin: 0 auto;
}

/* ===== 选项卡导航 ===== */
.tabs-nav {
    display: flex;
    gap: 6px;
    margin-bottom: 28px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 0;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 12px;
    font-size: 16px;
    font-weight: 500;
    color: #1a2a3a;                 /* 加深 → 对比度约 7.5:1 */
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.5px;
    border-radius: 8px 8px 0 0;
    position: relative;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: #0a1a2b;
    background: #f1f5f9;
}

.tab-btn.active {
    color: #0a1a2b;                 /* 加深 → 对比度 > 9:1 */
    border-bottom-color: #3b82f6;
    background: #ffffff;
    font-weight: 600;
    box-shadow: 0 -2px 8px rgba(59, 130, 246, 0.06);
}

.tab-btn .tab-badge {
    display: inline-block;
    background: #dce6f0;            /* 调整背景色以提高与文字的对比 */
    color: #0a1a2b;                 /* 加深文字 → 对比度约 6.5:1 */
    font-size: 12px;
    font-weight: 600;
    padding: 1px 1px;
    border-radius: 20px;
    margin-left: 1px;
    transition: background 0.2s;
}

.tab-btn.active .tab-badge {
    background: #1a5fb4;
    color: #ffffff;                 /* 白色在蓝色上对比度 ≥ 5.5:1 */
}

/* ===== 选项卡内容容器 ===== */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    0% { opacity: 0.5; transform: translateY(6px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ===== 公司卡片列表 ===== */
.company-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ===== 公司卡片 ===== */
.company-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    padding: 22px 26px;
    border: 1px solid #edf2f7;
    transition: box-shadow 0.2s ease;
}

.company-card:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

/* ===== 公司名称行 ===== */
.company-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.red-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    background-color: #e53e3e;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 0 2px rgba(229, 62, 62, 0.2);
}

.company-name {
    font-size: 20px;
    font-weight: 600;
    color: #0a1a2b;                 /* 已达标 */
    letter-spacing: 0.3px;
}

/* ===== 信息网格 ===== */
.info-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 20px;
    background: #f8fafc;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid #eef3f8;
    margin-bottom: 12px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #1f3347;                 /* 已达标 */
    white-space: nowrap;
}

.info-item .icon {
    font-size: 15px;
    line-height: 1;
    opacity: 0.8;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.info-item .label {
    color: #1f3347;                 /* 加深 → 与 #f8fafc 背景对比度约 5.2:1 */
    margin-right: 2px;
}

.info-item .value {
    font-weight: 500;
    color: #0a1a2b;                 /* 加深 → 对比度 > 9:1 */
}

/* ===== 经营范围 ===== */
.business-scope {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px dashed #dce4ed;
    margin-top: 2px;
}

.business-scope .icon {
    font-size: 15px;
    line-height: 1.4;
    opacity: 0.8;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.scope-text {
    font-size: 14px;
    color: #1f3347;                 /* 已达标 */
    line-height: 1.6;
    word-break: break-word;
}

.scope-text strong {
    font-weight: 600;
    color: #0a1a2b;                 /* 已达标 */
    margin-right: 6px;
}

/* ===== 加载更多按钮 ===== */
.load-more-wrap {
    text-align: center;
    margin-top: 12px;
}

.load-more-btn {
    background: #ffffff;
    border: 1px solid #d0d9e6;
    border-radius: 30px;
    padding: 10px 40px;
    font-size: 15px;
    font-weight: 500;
    color: #0a1a2b;                 /* 加深 → 对比度 > 9:1 */
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
    letter-spacing: 0.5px;
}

.load-more-btn:hover {
    background: #f0f4fe;
    border-color: #3b82f6;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.12);
    transform: translateY(-1px);
}

.load-more-btn:active {
    transform: translateY(0);
}

.load-more-btn.hidden {
    display: none;
}

/* ===== 加载进度提示 ===== */
.load-progress {
    text-align: center;
    font-size: 14px;
    color: #2c4050;                 /* 加深 → 对比度约 4.8:1 */
    margin-top: 6px;
    letter-spacing: 0.3px;
}

/* ===== 响应式 ===== */
@media (max-width: 600px) {
    body {
        padding: 20px 12px;
    }

    .site-title {
        font-size: 24px;
        padding-bottom: 12px;
    }

    .site-description-wrap {
        padding: 14px 16px 18px;
        margin-bottom: 20px;
    }
    .site-description-wrap::before {
        font-size: 16px;
        margin-bottom: 4px;
    }
    .site-description {
        font-size: 14px;
        max-width: 100%;
    }

    .tabs-nav {
        gap: 4px;
        margin-bottom: 20px;
    }
    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
        flex: 1 1 auto;
        min-width: 100%;
        text-align: center;
    }
    .tab-btn .tab-badge {
        font-size: 11px;
        padding: 0 4px;
        margin-left: 4px;
    }

    .company-list {
        gap: 16px;
    }

    .company-card {
        padding: 16px 14px;
    }
    .company-name {
        font-size: 18px;
    }
    .info-grid {
        flex-direction: column;
        gap: 5px;
        padding: 10px 12px;
    }
    .info-item {
        white-space: normal;
        font-size: 13px;
    }
    .business-scope {
        flex-direction: row;
        align-items: flex-start;
    }
    .red-dot {
        width: 10px;
        height: 10px;
    }

    .load-more-btn {
        padding: 8px 28px;
        font-size: 14px;
    }
    .load-progress {
        font-size: 13px;
    }
}

@media (max-width: 400px) {
    .tab-btn {
        padding: 8px 10px;
        font-size: 13px;
        min-width: 50px;
    }
    .info-item {
        font-size: 12px;
    }
    .company-name {
        font-size: 16px;
    }
    .site-title {
        font-size: 20px;
    }
    .site-description {
        font-size: 13px;
    }
}