/* 
   surveypayoutwatch.com - Unified Professional SEO Stylesheet 
   Design: Modern Trust-Building Blue
*/

:root {
    --primary: #2563eb;       /* 核心蓝色 */
    --primary-dark: #1e40af; 
    --secondary: #059669;      /* 绿色，用于按钮或成功标记 */
    --accent: #dc2626;         /* 红色，用于警告或防骗指南 */
    --text: #111827;          /* 深黑色，确保最高对比度 */
    --text-muted: #4b5563;    /* 辅助灰色 */
    --bg: #f8fafc;            /* 浅冷灰背景 */
    --card-bg: #ffffff;
    --border: #e5e7eb;
}

/* 基础重置 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    color: var(--text);
    background-color: var(--bg);
}

/* 统一头部设计 */
header {
    background: white;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.025em;
}

nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--primary);
}

/* 面包屑导航 Breadcrumbs */
.breadcrumb-container {
    padding: 0.75rem 5%;
    background: #ffffff;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.breadcrumb-container a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-container span {
    margin: 0 8px;
    color: #d1d5db;
}

/* 主内容容器 */
.container {
    max-width: 1000px;
    margin: 2.5rem auto;
    padding: 0 5%;
}

h1, h2, h3 {
    color: var(--text);
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 { font-size: 2.25rem; text-align: center; }
h2 { font-size: 1.5rem; margin-top: 2rem; }

/* 响应式卡片网格 - 首页 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

/* 平台详情卡片 - 内页 */
.site-card {
    background: white;
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

/* 按钮样式 */
.cta-btn {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
    transition: background 0.2s;
}

.cta-btn:hover {
    background-color: var(--primary-dark);
}

/* 响应式表格设计 */
.table-container {
    overflow-x: auto;
    margin: 2rem 0;
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f9fafb;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* 警告框和提示框 */
.warning-box {
    background: #fef2f2;
    border-left: 4px solid var(--accent);
    padding: 1.25rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.tips-box {
    background: #eff6ff;
    border-left: 4px solid var(--primary);
    padding: 1.25rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

/* 统一页脚 - 修复 PageSpeed 对比度红字 */
footer {
    text-align: center;
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    background: white;
    margin-top: 5rem;
}

footer p {
    color: #374151 !important; /* 调深了灰色，符合无障碍标准 */
    font-size: 0.85rem;
}

/* 移动端微调 */
@media (max-width: 640px) {
    h1 { font-size: 1.75rem; }
    header { flex-direction: column; gap: 1rem; text-align: center; }
    .container { margin: 1.5rem auto; }
}

.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%; left: 0;
    background: var(--card-bg, #fff);
    border: 1px solid var(--border, #e5e7eb);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    padding: 0.5rem 0;
    min-width: 200px;
    z-index: 1001;
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
    display: block;
    padding: 0.5rem 1rem;
    white-space: nowrap;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    nav {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-dropdown {
        display: block;
        width: 100%;
    }
    .nav-dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 1rem;
        min-width: 0;
        display: none;
    }
    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }
    .nav-dropdown:hover .nav-dropdown-menu {
        display: none;
    }
    .nav-dropdown.open:hover .nav-dropdown-menu {
        display: block;
    }
}