/* ============================================
   光通启明 · 基础样式
   上海易通和维科技有限责任公司
   yitonghewei.com
   ============================================ */

:root {
    /* 主色 */
    --color-ink: #1a1a1a;
    --color-paper: #faf8f3;
    --color-light: #ffffff;
    --color-gold: #c8a96a;
    --color-jade: #7a9b8e;
    --color-mist: #e8e4dc;
    
    /* 文字 */
    --font-serif: "Songti SC", "STSong", "SimSun", serif;
    --font-sans: "PingFang SC", "Microsoft YaHei", sans-serif;
    
    /* 尺寸 */
    --max-width: 1200px;
    --radius: 8px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 链接 */
a {
    color: var(--color-ink);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-gold);
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--color-ink);
    color: var(--color-paper);
}

.btn-primary:hover {
    background: var(--color-gold);
    color: var(--color-ink);
}

.btn-secondary {
    background: transparent;
    color: var(--color-ink);
    border: 1px solid var(--color-ink);
}

.btn-secondary:hover {
    background: var(--color-ink);
    color: var(--color-paper);
}

/* 顶部导航 */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--color-ink);
    color: var(--color-paper);
    border-radius: 50%;
    font-family: var(--font-serif);
    font-size: 1.25rem;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
}

.site-nav {
    display: flex;
    gap: 2rem;
}

.site-nav a {
    font-size: 0.95rem;
    letter-spacing: 0.05em;
}

.site-nav a.active {
    color: var(--color-gold);
    border-bottom: 1px solid var(--color-gold);
}


/* 真话版数据说明 */
.truth-note {
    display: inline-block;
    margin-top: 2rem;
    padding: 1rem 2rem;
    border-left: 2px solid #ffaa00;
    border-right: 2px solid #ffaa00;
    background: rgba(255,170,0,0.05);
    border-radius: 40px;
    font-size: 1rem;
    color: #f0e6d0;
    letter-spacing: 0.1rem;
}

.truth-note span {
    color: #ffaa00;
    font-weight: 700;
    font-size: 1.2rem;
}



/* 底部 */
.site-footer {
    margin-top: auto;
    padding: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: #666;
    border-top: 1px solid var(--color-mist);
}

.site-footer a {
    color: #666;
}

.site-footer a:hover {
    color: var(--color-gold);
}

.site-footer.minimal {
    padding: 1rem;
    border-top: none;
}

/* 响应式 */
@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .site-nav {
        gap: 1rem;
    }
    
    .site-nav a {
        font-size: 0.85rem;
    }
}