/* ============================================================
   templatein17 - 2026-08-27
   宏观骨架: C. 卡片网格仪表盘式
   主色: 原创深蓝 (#1e293b) + 青绿 (#0f766e)
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #1e293b;
    --primary-light: #334155;
    --secondary: #0f766e;
    --secondary-light: #14b8a6;
    --accent: #0d9488;
    --bg-body: #f1f5f9;
    --bg-white: #ffffff;
    --text-color: #0f172a;
    --text-muted: #475569;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --radius: 8px;
    --radius-btn: 6px;
    --container-width: 1200px;
    --header-height: 72px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-color);
    line-height: 1.7;
}

a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover {
    color: var(--primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--primary);
    /* 无装饰，纯加粗 —— 对应 Phase 1.4 标题层级装饰记录 */
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}
h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
}
h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 0.75rem;
}
p {
    margin-bottom: 1rem;
}

/* ---------- Buttons (小圆角矩形, border-radius: 6px) ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.8rem;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.5;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--secondary);
    border-color: var(--secondary);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.btn-large {
    padding: 0.9rem 2.8rem;
    font-size: 1.1rem;
}

/* ---------- Header ---------- */
.site-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}
.logo img {
    border-radius: 6px;
    object-fit: cover;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.main-nav a {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}
.main-nav a:hover,
.main-nav a.nav-home {
    color: var(--secondary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
}
.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: all 0.2s;
}

/* ---------- Hero (首页) ---------- */
.hero {
    padding: 3.5rem 0 2.5rem;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.hero-inner {
    text-align: center;
    max-width: 800px;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 1.8rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.meta-item {
    background: var(--bg-body);
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

/* ---------- Dashboard Grid (卡片网格仪表盘式 - 骨架 C) ---------- */
.dashboard-grid {
    padding: 2.5rem 0;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
}

.card-dashboard {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem 1.2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}
.card-dashboard:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.card-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}
.card-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
}

/* ---------- Content Section ---------- */
.content-section {
    padding: 2.5rem 0 4rem;
}

.content-inner {
    background: var(--bg-white);
    padding: 2.5rem 3rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.content-inner h2:first-child {
    margin-top: 0;
}
.content-inner ul,
.content-inner ol {
    padding-left: 1.8rem;
    margin-bottom: 1rem;
}
.content-inner li {
    margin-bottom: 0.3rem;
}
.content-inner img {
    margin: 1.5rem 0;
    border-radius: var(--radius);
}

.content-figure {
    margin: 1.5rem 0;
}

/* ---------- Page Hero (下载页) ---------- */
.page-hero {
    padding: 2.5rem 0 1.5rem;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}
.page-hero h1 {
    margin-bottom: 0.25rem;
}
.page-hero .subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ---------- Info Table (下载页) ---------- */
.info-table-section {
    padding: 2rem 0;
}

.info-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem 2.5rem;
    box-shadow: var(--shadow-sm);
}
.info-card h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}
.info-table tr {
    border-bottom: 1px solid var(--border-color);
}
.info-table tr:last-child {
    border-bottom: none;
}
.info-table th {
    text-align: left;
    width: 35%;
    padding: 0.6rem 0.5rem 0.6rem 0;
    font-weight: 600;
    color: var(--primary);
}
.info-table td {
    padding: 0.6rem 0.5rem;
    color: var(--text-color);
}

.download-actions {
    text-align: center;
    padding-top: 0.5rem;
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--primary);
    color: #cbd5e1;
    padding: 2.5rem 0;
    border-top: 1px solid #334155;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
}
.footer-nav a {
    color: #94a3b8;
    font-size: 0.9rem;
}
.footer-nav a:hover {
    color: #fff;
}

.footer-copy {
    font-size: 0.85rem;
    color: #64748b;
    margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.5rem;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-white);
        padding: 1.5rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
        gap: 0.8rem;
    }
    .main-nav.open {
        display: flex;
    }

    .hero {
        padding: 2rem 0 1.5rem;
    }
    .hero-meta {
        gap: 0.5rem 1rem;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .content-inner {
        padding: 1.5rem;
    }

    .info-card {
        padding: 1.5rem;
    }
    .info-table th {
        width: 40%;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
    .footer-nav {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .grid-4 {
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
    }
    .card-dashboard {
        padding: 1rem 0.8rem;
    }
    .card-value {
        font-size: 1.1rem;
    }
    .btn {
        padding: 0.6rem 1.4rem;
        font-size: 0.9rem;
    }
    .btn-large {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }
}