/* ============ 全局字体和颜色设置 ============ */

/* CSS变量定义 */
:root {
    /* 字体设置 */
    --font-serif: 'Playfair Display', 'Microsoft YaHei', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    
    /* 主色调（根据用户提供的五色调） */
    --color-primary: #132843; /* 深色 */
    --color-primary-light: #3966A2; /* 中深 */
    --color-primary-dark: #6191D3; /* 中浅 */
    --color-primary-gradient: linear-gradient(135deg, #132843 0%, #6191D3 100%);
    
    /* 背景色 */
    --color-bg-primary: #132843;
    --color-bg-secondary: rgba(0, 0, 0, 0.95);
    --color-bg-overlay: rgba(0, 0, 0, 0.6);
    --color-bg-card: rgba(26, 26, 26, 0.95);
    --color-bg-input: rgba(0, 0, 0, 0.5);
    
    /* 文字颜色 */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.85);
    --color-text-tertiary: rgba(255, 255, 255, 0.7);
    --color-text-quaternary: rgba(255, 255, 255, 0.6);
    --color-text-quinary: rgba(255, 255, 255, 0.5);
    --color-text-accent: #6191D3;
    
    /* 边框颜色 */
    --color-border-primary: rgba(97, 145, 211, 0.25);
    --color-border-secondary: rgba(97, 145, 211, 0.15);
    --color-border-accent: rgba(57, 102, 162, 0.35);
    
    /* 阴影 */
    --shadow-primary: 0 0 30px rgba(97, 145, 211, 0.25);
    --shadow-secondary: 0 4px 15px rgba(57, 102, 162, 0.2);
    --shadow-glow: 0 0 20px rgba(97, 145, 211, 0.2);
}

/* ============ 全局基础样式 ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-y: scroll;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-serif);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-weight: 400;
    line-height: 1.6;
    min-height: 100vh;
}

/* ============ 标题字体设置 ============ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 2px;
}

h1 {
    font-size: 32px;
    font-weight: 300;
    letter-spacing: 2px;
}

h2 {
    font-size: 28px;
    letter-spacing: 2px;
}

h3 {
    font-size: 24px;
    letter-spacing: 1px;
}

h4 {
    font-size: 20px;
    letter-spacing: 1px;
}

h5 {
    font-size: 18px;
    letter-spacing: 1px;
}

h6 {
    font-size: 16px;
    letter-spacing: 1px;
}

/* ============ 文本元素字体设置 ============ */
p {
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--color-text-tertiary);
    line-height: 1.8;
}

a {
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

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

/* ============ 表单元素字体设置 ============ */
input, select, textarea, button {
    font-family: var(--font-sans);
    font-size: 14px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
select,
textarea {
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--color-text-secondary);
    background: var(--color-bg-input);
    border: 1px solid var(--color-border-primary);
    padding: 12px;
    transition: all 0.3s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-border-accent);
    box-shadow: var(--shadow-secondary);
}

button {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
}

label {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-accent);
    letter-spacing: 1px;
}

/* ============ 导航链接字体设置 ============ */
nav a,
.nav-link {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
    color: var(--color-text-secondary);
}

nav a:hover,
.nav-link:hover {
    color: var(--color-text-accent);
}

/* ============ Logo字体设置 ============ */
.logo,
.luxury-logo {
    font-family: 'Playfair Display', 'Microsoft YaHei', serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-accent);
    letter-spacing: 4px;
    text-decoration: none;
    text-shadow: 0 0 30px rgba(212,175,55,0.4);
}

/* Logo 图片尺寸控制：默认放大为 40px，高度可在单页覆盖（如 system_nav.html 保持原始小尺寸） */
.logo img,
.logo-link img,
.luxury-logo img {
    height: 40px;
    vertical-align: middle;
    display: inline-block;
    max-height: 48px;
}

/* ============ 按钮样式 ============ */
.btn-primary,
.upload-btn,
.submit-btn {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
    background: var(--color-primary-gradient);
    color: var(--color-bg-primary);
    border: none;
    padding: 12px 32px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: var(--shadow-secondary);
}

.btn-primary:hover,
.upload-btn:hover,
.submit-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(212, 175, 55, 0.6);
}

.btn-secondary {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
    background: transparent;
    color: var(--color-text-accent);
    border: 2px solid var(--color-border-primary);
    padding: 12px 32px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--color-border-accent);
}

/* ============ 卡片样式 ============ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-primary);
    padding: 40px;
    backdrop-filter: blur(10px);
}

/* ============ 响应式字体大小 ============ */
@media (max-width: 768px) {
    h1 {
        font-size: 28px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    p {
        font-size: 13px;
    }
    
    input, select, textarea, button {
        font-size: 13px;
    }
}