/*
 * 主样式文件
 * 包含MTO Moving主题的所有样式规则
 * 
 * @package MTO Moving
 * @since 1.0.0
 */

/* ==========================================================================
   CSS 变量定义 - 遵循 DESIGN_SYSTEM.md
   ========================================================================== */

:root {
    /* 颜色系统 */
    --color-primary: #2c5f8d;
    --color-primary-dark: #1a365d;
    --color-primary-rgb: 44, 95, 141;
    --color-secondary: #f39c12;
    --color-success: #27ae60;
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* 文字颜色 */
    --color-text: #555555;
    --color-heading: #2c3e50;
    --color-background: #ffffff;
    
    /* 边框和灰度 */
    --color-border: #e0e0e0;
    --color-gray: #999999;
    --color-gray-light: #ecf0f1;
    --color-gray-lightest: #f8fafc;
    
    /* 字体 */
    --font-family-base: 'Noto Sans SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
    --font-family-heading: 'Noto Sans SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
    
    /* 字号 */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-md: 18px;
    --font-size-lg: 22px;
    --font-size-xl: 28px;
    --font-size-xxl: 36px;
    --font-size-xxxl: 42px;
    
    /* 字重 */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* 行高 */
    --line-height-heading: 1.2;
    --line-height-base: 1.6;
    
    /* 间距 (8px栅格) */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* 容器宽度 */
    --container-width: 1200px;
    --container-width-xl: 1400px;
    --container-width-lg: 1024px;
    --container-width-md: 768px;
    
    /* 圆角 */
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 12px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================================================
   重置样式和基础样式
   ========================================================================== */

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

html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 链接样式 */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover,
a:focus {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-md);
    color: var(--color-heading);
}

h1 { font-size: var(--font-size-xxl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4 { font-size: var(--font-size-md); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

/* 段落和列表 */
p {
    margin-bottom: var(--spacing-md);
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

/* 表单元素 */
input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: border-color var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(var(--color-primary-rgb), 0.1);
}

/* ==========================================================================
   布局样式.site-main {
    min-height: 60vh;
    padding: var(--spacing-xl) 0;
}
   ========================================================================== */

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

/* ==========================================================================
   页面Hero区 - 统一样式 (适用于所有内页)
   ========================================================================== */

.page-hero {
    background: linear-gradient(135deg, #2c5f8d 0%, #4a90c5 100%);
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="40" stroke="rgba(255,255,255,0.05)" stroke-width="2" fill="none"/></svg>');
    opacity: 0.3;
}

.page-hero .hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.page-hero .page-title {
    font-size: 48px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
    line-height: 1.2;
}

.page-hero .page-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 32px;
    line-height: 1.6;
}

.trust-badges-hero {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.trust-badges-hero .badge-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.15);
    padding: 12px 24px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.trust-badges-hero .badge-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.trust-badges-hero .badge-item svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

/* Hero区响应式 */
@media (max-width: 768px) {
    .page-hero {
        padding: 80px 0 60px;
    }
    
    .page-hero .page-title {
        font-size: 36px;
    }
    
    .page-hero .page-subtitle {
        font-size: 18px;
    }
    
    .trust-badges-hero {
        gap: 16px;
    }
    
    .trust-badges-hero .badge-item {
        font-size: 14px;
        padding: 10px 16px;
    }
}

@media (max-width: 480px) {
    .page-hero .page-title {
        font-size: 32px;
    }
    
    .page-hero .page-subtitle {
        font-size: 16px;
    }
    
    .trust-badges-hero .badge-item {
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================================================
   按钮样式
   ========================================================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    line-height: 1.4;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-white);
    border-color: var(--color-secondary);
    box-shadow: 0 4px 12px rgba(243, 156, 18, 0.3);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #e67e22;
    border-color: #e67e22;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(243, 156, 18, 0.4);
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover,
.btn-outline:focus {
    background-color: var(--color-gray-light);
    border-color: var(--color-gray);
}

/* ==========================================================================
   卡片样式
   ========================================================================== */

.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-gray-lightest);
}

/* ==========================================================================
   网格系统
   ========================================================================== */

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ==========================================================================
   工具类
   ========================================================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ==========================================================================
   响应式设计
   ========================================================================== */

/* 平板设备 */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .grid-4 {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .site-main {
        padding: var(--spacing-lg) 0;
    }
}

/* 小屏幕移动设备 */
@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}