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

/* 基础字体设置：中文使用 Source Han Serif TC，英文使用 Source Serif 4 */
/* Source Han Serif TC 通过 jsDelivr CDN 加载 */
@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-300-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-300-normal.woff') format('woff');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-400-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-400-normal.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-500-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-500-normal.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-600-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-latin-600-normal.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* 中文字符范围 */
@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-300-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-300-normal.woff') format('woff');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
    unicode-range: U+4E00-9FFF, U+3400-4DBF, U+20000-2A6DF, U+2A700-2B73F, U+2B740-2B81F, U+2B820-2CEAF, U+F900-FAFF, U+2F800-2FA1F;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-400-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-400-normal.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
    unicode-range: U+4E00-9FFF, U+3400-4DBF, U+20000-2A6DF, U+2A700-2B73F, U+2B740-2B81F, U+2B820-2CEAF, U+F900-FAFF, U+2F800-2FA1F;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-500-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-500-normal.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
    unicode-range: U+4E00-9FFF, U+3400-4DBF, U+20000-2A6DF, U+2A700-2B73F, U+2B740-2B81F, U+2B820-2CEAF, U+F900-FAFF, U+2F800-2FA1F;
}

@font-face {
    font-family: 'Source Han Serif TC';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-600-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/source-han-serif-tc@5.0.0/files/source-han-serif-tc-chinese-traditional-600-normal.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
    unicode-range: U+4E00-9FFF, U+3400-4DBF, U+20000-2A6DF, U+2A700-2B73F, U+2B740-2B81F, U+2B820-2CEAF, U+F900-FAFF, U+2F800-2FA1F;
}

/* 字体全局规则 */
body {
    font-family: 'Source Serif 4', 'Source Han Serif TC', serif; /* 英文在前，中文在后 */
    line-height: 1.6;
    color: #333;
}

/* 确保所有元素（如按钮、输入框等）也遵循此规则 */
* {
    font-family: 'Source Serif 4', 'Source Han Serif TC', serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Section 内容区域的页边距比 header 更大 */
.section .container {
    padding: 0 40px;
}

@media (max-width: 768px) {
    .section .container {
        padding: 0 30px;
    }
}

.header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo a {
    display: inline-block;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo a:hover {
    opacity: 0.8;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: #333;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-link:hover {
    opacity: 0.8;
}

.section {
    min-height: 80vh;
    padding: 60px 0;
}

#about {
    background-color: #f8f9fa;
}

.wip {
    /* 1. 字体逻辑：英文优先使用 Source Serif 4 */
    font-family: 'Source Serif 4', 'Source Han Serif TC', serif;
    
    /* 2. 字重：Medium 对应 300 */
    font-weight: 300;
    
    /* 3. 大小：可以根据需要调整此数值 */
    font-size: 2.5rem; 
    
    /* 4. 水平居中 */
    text-align: center;
    
    /* 可选：增加一点顶部间距让视觉更平衡 */
    margin-top: 200px;
}

#contact {
    background-color: #fff;
}

#contact h2 {
    font-size: 36px;
    margin-bottom: 40px;
    color: #2c3e50;
    text-align: left;
}

.contact-info {
    max-width: 900px;
    margin: 0;
    text-align: left;
}

.phone-section,
.address-section,
.social-section {
    margin-bottom: 40px;
}

.social-section {
    margin-top: 40px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.phone-section h3,
.address-section h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
}

.phone-link {
    color: #555;
    text-decoration: none;
    font-size: 20px;
    font-weight: 300;
    transition: opacity 0.3s ease;
    display: inline-block;
    margin: 10px 0;
}

.phone-link:hover {
    opacity: 0.8;
}

.address {
    font-size: 18px;
    line-height: 1.8;
    color: #555;
    margin: 10px 0;
    font-weight: 300;
}

.social-link {
    display: inline-block;
    color: #555;
    transition: opacity 0.3s ease;
    line-height: 0;
    margin: 10px 0;
}

.social-link:hover {
    opacity: 0.8;
}

.social-icon {
    width: 24px;
    height: 24px;
    display: block;
}