@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600&family=Sora:wght@600;700&display=swap');

:root {
    --bg-porcelain: #F4F7F6;
    --primary-teal: #0F5257;
    --text-ink: #10282B;
    --accent-cinnabar: #C0472E;
    --border-hairline: #D8E0DE;
    --radius-ui: 12px;
    --radius-btn: 2px; /* Near-square corners */
}

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

body {
    font-family: 'Manrope', sans-serif;
    background-color: var(--bg-porcelain);
    color: var(--text-ink);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: 'Sora', sans-serif;
    color: var(--primary-teal);
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 { font-size: 40px; }
h2 { font-size: 28px; }
h3 { font-size: 20px; }

p {
    margin-bottom: 1rem;
    color: var(--text-ink);
    opacity: 0.9;
}

.metric {
    font-variant-numeric: tabular-nums;
    font-family: 'Manrope', sans-serif;
}

a {
    color: var(--primary-teal);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--text-ink);
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.2s ease, color 0.2s ease;
    cursor: pointer;
    font-family: 'Manrope', sans-serif;
}

.btn-primary {
    background-color: var(--primary-teal);
    color: #ffffff;
    border: 1px solid var(--primary-teal);
}

.btn-primary:hover {
    background-color: #0b3d41; /* Subtle darken */
    color: #ffffff;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-teal);
    border: 1px solid var(--border-hairline);
}

.btn-outline:hover {
    border-color: var(--primary-teal);
}

.btn-large {
    padding: 14px 32px;
    font-size: 15px;
}

/* 导航栏 */
.navbar {
    border-bottom: 1px solid var(--border-hairline);
    padding: 24px 0;
    background: var(--bg-porcelain);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-family: 'Sora', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-teal);
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-ink);
}

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

/* 布局网格 */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Section 通用 */
section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border-hairline);
}

.section-title {
    margin-bottom: 40px;
}

/* 左对齐排版 (Editorial) */
.editorial-header {
    max-width: 600px;
    margin-bottom: 60px;
}

/* Hero Section */
.hero {
    padding: 120px 0;
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    max-width: 600px;
    color: var(--text-ink);
    opacity: 0.8;
}

/* Cards (Minimal) */
.card {
    padding: 32px;
    background: var(--bg-porcelain);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-ui);
    text-align: left;
}

.card-icon {
    font-size: 24px;
    margin-bottom: 24px;
    color: var(--primary-teal);
}

/* 细线表格 (Metrics Table) */
.table-container {
    width: 100%;
    overflow-x: auto;
}

.fine-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    margin-top: 24px;
}

.fine-table th, .fine-table td {
    padding: 20px;
    border-bottom: 1px solid var(--border-hairline);
    font-size: 14px;
}

.fine-table th {
    font-family: 'Sora', sans-serif;
    color: var(--primary-teal);
    font-weight: 600;
}

.fine-table td {
    color: var(--text-ink);
}

.fine-table tr:hover td {
    background-color: #ecf0ef;
}

/* FAQ */
.faq-list {
    max-width: 700px;
}

.faq-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-hairline);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item h4 {
    font-size: 16px;
    margin-bottom: 12px;
}

/* 延伸阅读 */
.resources {
    border-bottom: none;
}

.resource-box {
    padding: 40px;
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-ui);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-hairline);
    padding: 60px 0 40px;
}

.footer-links {
    margin-bottom: 40px;
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-ink);
    opacity: 0.7;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    font-size: 12px;
    opacity: 0.5;
}

/* Blog Cards */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.blog-card { border: 1px solid var(--border-hairline); border-radius: var(--radius-ui); padding: 32px; background: var(--bg-porcelain); display: flex; flex-direction: column; transition: all 0.2s ease; }
.blog-card:hover { border-color: var(--primary-teal); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(15, 82, 87, 0.05); }
.blog-meta { font-size: 13px; color: var(--text-ink); opacity: 0.6; margin-bottom: 16px; display: flex; gap: 16px; font-variant-numeric: tabular-nums; }
.blog-title { font-size: 18px; margin-bottom: 12px; line-height: 1.4; color: var(--primary-teal); }
.blog-excerpt { font-size: 14px; opacity: 0.8; margin-bottom: 32px; flex-grow: 1; color: var(--text-ink); }
.blog-cta { font-weight: 600; font-size: 14px; color: var(--primary-teal); margin-top: auto; display: inline-flex; align-items: center; gap: 4px; }
.blog-cta::after { content: '→'; transition: transform 0.2s; }
.blog-card:hover .blog-cta::after { transform: translateX(4px); }
.blog-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 40px; border-bottom: 1px solid var(--border-hairline); padding-bottom: 24px; }

/* Article Page */
.article-container { max-width: 800px; padding: 60px 24px; margin: 0 auto; }
.article-header { margin-bottom: 40px; border-bottom: 1px solid var(--border-hairline); padding-bottom: 40px; }
.article-header h1 { font-size: 32px; margin-bottom: 16px; line-height: 1.4; }
.article-meta { display: flex; gap: 24px; font-size: 14px; opacity: 0.6; margin-top: 24px; }
.article-content h2 { font-size: 24px; margin: 40px 0 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border-hairline); }
.article-content h3 { font-size: 18px; margin: 30px 0 16px; }
.article-content p { margin-bottom: 20px; font-size: 16px; line-height: 1.8; opacity: 0.9; }
.article-content ul, .article-content ol { margin-bottom: 24px; padding-left: 24px; opacity: 0.9; }
.article-content li { margin-bottom: 12px; line-height: 1.6; }
.breadcrumb { font-size: 14px; margin-bottom: 40px; opacity: 0.7; display: flex; align-items: center; }
.breadcrumb a { color: var(--primary-teal); }
.breadcrumb-sep { margin: 0 8px; opacity: 0.5; }

/* 响应式媒体查询 */
@media (max-width: 768px) {
    .nav-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .nav-links {
        display: none; /* Mobile menu would go here */
    }

    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .btn {
        width: 100%;
        padding: 16px 20px; /* 适合手指点击 */
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    h1 { font-size: 32px; }
    h2 { font-size: 24px; }
    
    .fine-table th, .fine-table td {
        padding: 16px 12px;
        font-size: 13px;
    }
}

/* Floating Button & Flow */
.floating-btn { position: fixed; bottom: 40px; right: 40px; width: 50px; height: 50px; background-color: var(--bg-porcelain); border: 1px solid var(--border-hairline); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--primary-teal); box-shadow: 0 4px 12px rgba(15,82,87,0.1); transition: all 0.2s ease; z-index: 1000; }
.floating-btn:hover { background-color: var(--primary-teal); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(15,82,87,0.15); }
.read-next-box { margin-top: 60px; padding: 32px; background-color: var(--bg-porcelain); border: 1px solid var(--border-hairline); border-radius: var(--radius-ui); transition: all 0.2s ease; }
.read-next-box:hover { border-color: var(--primary-teal); }
.read-next-box h3 { margin-bottom: 12px; font-size: 16px; opacity: 0.6; }
.read-next-box a { font-size: 20px; font-weight: 600; color: var(--primary-teal); display: inline-flex; align-items: center; gap: 8px; text-decoration: none; }
.read-next-box a::after { content: '→'; transition: transform 0.2s; }
.read-next-box:hover a::after { transform: translateX(6px); }
@media (max-width: 768px) { .floating-btn { bottom: 20px; right: 20px; } }