/**
 * 啄木鸟家庭维修 - 完整CSS样式表
 * Version: 1.0.0
 * Author: 啄木鸟家庭维修
 */

/* ==================== CSS变量定义 ==================== */
:root {
    /* 主色调 */
    --primary-color: #1a56db;
    --primary-dark: #1442ab;
    --primary-light: #3b7beb;
    --primary-bg: #eef2ff;
    
    /* 强调色 */
    --accent-color: #f97316;
    --accent-dark: #ea580c;
    --accent-light: #fb923c;
    --accent-bg: #fff7ed;
    
    /* 功能色 */
    --success-color: #16a34a;
    --warning-color: #ca8a04;
    --danger-color: #dc2626;
    --info-color: #0284c7;
    
    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* 背景色 */
    --bg-white: #ffffff;
    --bg-gray-50: #f9fafb;
    --bg-gray-100: #f3f4f6;
    --bg-gray-200: #e5e7eb;
    --bg-gray-300: #d1d5db;
    
    /* 边框 */
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* 布局 */
    --container-max: 1200px;
    --header-height: 70px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
}

/* ==================== 基础重置 ==================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

/* ==================== 容器布局 ==================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-top: var(--spacing-md);
}

.more-link {
    display: inline-block;
    color: var(--primary-color);
    font-size: 0.95rem;
    margin-top: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.more-link:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

/* ==================== Header 导航栏 ==================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    height: 60px;
    box-shadow: var(--shadow-md);
}

.site-header.transparent {
    background: transparent;
}

.site-header.transparent .logo-text,
.site-header.transparent .main-nav a,
.site-header.transparent .phone-number {
    color: var(--text-white);
}

.site-header.transparent .phone-icon {
    filter: brightness(0) invert(1);
}

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.main-nav a {
    position: relative;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

/* 头部联系电话 */
.header-contact {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.phone-icon {
    font-size: 1.2rem;
}

.phone-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    transition: color var(--transition-fast);
}

.phone-number:hover {
    color: var(--accent-dark);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    padding: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* 移动端导航 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-white);
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-header .logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.mobile-close {
    width: 30px;
    height: 30px;
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.mobile-nav-links {
    padding: var(--spacing-md);
}

.mobile-nav-links a {
    display: block;
    padding: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border-light);
}

.mobile-nav-links a:hover {
    background: var(--bg-gray-50);
    color: var(--primary-color);
}

.mobile-nav-services {
    padding: var(--spacing-md);
    border-top: 8px solid var(--bg-gray-100);
}

.mobile-nav-services h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.mobile-nav-services a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    border-radius: var(--radius-md);
}

.mobile-nav-services a:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.mobile-nav-contact {
    padding: var(--spacing-lg);
    border-top: 8px solid var(--bg-gray-100);
}

.btn-call {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-white);
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
}

.btn-call:hover {
    background: var(--accent-dark);
    color: var(--text-white);
}

/* ==================== Hero 区域 ==================== */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin-top: 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="80" r="15" fill="rgba(255,255,255,0.05)"/><circle cx="80" cy="20" r="20" fill="rgba(255,255,255,0.05)"/><circle cx="60" cy="50" r="10" fill="rgba(255,255,255,0.03)"/></svg>');
    background-size: 200px;
}

.hero-content {
    text-align: center;
    color: var(--text-white);
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-search {
    display: flex;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--radius-full);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.search-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    outline: none;
    font-size: 1rem;
}

.search-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--accent-color);
    color: var(--text-white);
    font-size: 1rem;
    font-weight: 600;
    transition: background var(--transition-fast);
}

.search-btn:hover {
    background: var(--accent-dark);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-tags span {
    color: rgba(255, 255, 255, 0.8);
}

.hero-tags a {
    color: var(--text-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.hero-tags a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* ==================== 服务分类网格 ==================== */
.services-section {
    background: var(--bg-gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-name {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.service-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ==================== 热门服务卡片 ==================== */
.hot-services-section {
    background: var(--bg-white);
}

.hot-services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.hot-service-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.hot-service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.hot-service-img {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: var(--bg-gray-100);
}

.hot-service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hot-service-card:hover .hot-service-img img {
    transform: scale(1.1);
}

.hot-service-info {
    padding: var(--spacing-lg);
}

.hot-service-info h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.hot-service-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hot-service-more {
    display: inline-block;
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    transition: transform var(--transition-fast);
}

.hot-service-card:hover .hot-service-more {
    transform: translateX(5px);
}

/* ==================== 维修知识列表 ==================== */
.knowledge-section {
    background: var(--bg-gray-50);
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.knowledge-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.knowledge-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.knowledge-img {
    height: 200px;
    overflow: hidden;
    background: var(--bg-gray-100);
}

.knowledge-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.knowledge-card:hover .knowledge-img img {
    transform: scale(1.05);
}

.knowledge-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.knowledge-content h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.knowledge-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.knowledge-date {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

/* ==================== 客户评价 ==================== */
.testimonials-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.testimonials-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.03)"/></svg>');
    background-size: 300px;
}

.testimonials-section .section-title {
    color: var(--text-white);
}

.testimonials-section .section-title::after {
    background: var(--text-white);
}

.testimonials-section .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    position: relative;
}

.testimonial-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-rating {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.testimonial-content::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: -5px;
    font-size: 3rem;
    color: var(--primary-bg);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-city {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==================== CTA 区域 ==================== */
.cta-section {
    background: var(--bg-gray-50);
    padding: var(--spacing-3xl) 0;
}

.cta-box {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    text-align: center;
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.cta-box h2 {
    font-size: 2rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.cta-box p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ==================== 按钮样式 ==================== */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--accent-color);
    color: var(--text-white);
    border: 2px solid var(--accent-color);
}

.btn-accent:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: var(--text-white);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.1rem;
}

.btn-sidebar {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--accent-color);
    color: var(--text-white);
    text-align: center;
    font-weight: 600;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
    transition: all var(--transition-fast);
}

.btn-sidebar:hover {
    background: var(--accent-dark);
    color: var(--text-white);
    transform: scale(1.02);
}

/* ==================== Footer 底部 ==================== */
.site-footer {
    background: var(--text-primary);
    color: var(--text-light);
    padding-top: var(--spacing-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
    font-size: 1.1rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-color);
}

.footer-about p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.footer-services ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-services a {
    color: var(--text-light);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.footer-services a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-qrcode .qrcode-box {
    text-align: center;
}

.footer-qrcode img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    background: var(--bg-white);
    padding: var(--spacing-xs);
}

.footer-qrcode p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.footer-bottom {
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.copyright a {
    color: var(--text-light);
}

.copyright a:hover {
    color: var(--primary-color);
}

/* 悬浮客服按钮 */
.float-contact {
    position: fixed;
    bottom: 100px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    z-index: 999;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    animation: pulse 2s infinite;
}

.float-phone {
    background: var(--success-color);
    color: var(--text-white);
}

.float-kefu {
    background: var(--primary-color);
    color: var(--text-white);
    animation-delay: 0.5s;
}

.float-btn:hover {
    transform: scale(1.1);
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(22, 163, 74, 0);
    }
}

/* ==================== 面包屑导航 ==================== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

.breadcrumb a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb span {
    color: var(--text-primary);
}

/* ==================== 页面标题区 ==================== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 120px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="80" cy="20" r="15" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 200px;
}

.page-header .container {
    position: relative;
}

.page-title {
    font-size: 2.5rem;
    color: var(--text-white);
    margin-bottom: 0;
}

.page-header .breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.page-header .breadcrumb a:hover {
    color: var(--text-white);
}

.page-header .breadcrumb span {
    color: var(--text-white);
}

/* ==================== 内容布局 ==================== */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: 500px;
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-2xl);
}

/* 文章列表 */
.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.article-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.article-link {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.article-img {
    width: 280px;
    height: 180px;
    flex-shrink: 0;
    overflow: hidden;
    background: var(--bg-gray-100);
}

.article-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article-item:hover .article-img img {
    transform: scale(1.05);
}

.article-info {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

.article-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition-fast);
}

.article-item:hover .article-title {
    color: var(--primary-color);
}

.article-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

.meta-date::before {
    content: '📅 ';
}

.meta-views::before {
    content: '👁 ';
}

/* 侧边栏 */
.sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    align-self: start;
}

.sidebar-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.sidebar-title {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.sidebar-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.sidebar-list li {
    border-bottom: 1px solid var(--border-light);
    padding-bottom: var(--spacing-sm);
}

.sidebar-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.sidebar-list a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.sidebar-list a:hover {
    color: var(--primary-color);
    padding-left: var(--spacing-sm);
}

.sidebar-contact {
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--bg-white) 100%);
    border: 1px solid var(--primary-color);
}

.sidebar-contact p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.sidebar-contact strong {
    font-size: 1.2rem;
    color: var(--accent-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--bg-gray-50);
    border-radius: var(--radius-lg);
}

.empty-state p {
    font-size: 1.1rem
/* ==================== 分页样式 ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background: var(--primary-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination .current {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.pagination .prev,
.pagination .next {
    padding: 0 var(--spacing-lg);
}

.pagination .ellipsis {
    border: none;
    background: none;
    color: var(--text-light);
}

/* ==================== 文章详情页 ==================== */
.article-detail {
    max-width: 900px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--spacing-2xl);
}

.article-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
}

.article-meta-detail {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-meta-detail span::before {
    margin-right: var(--spacing-xs);
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-body p {
    margin-bottom: var(--spacing-lg);
}

.article-body h2 {
    font-size: 1.5rem;
    margin: var(--spacing-2xl) 0 var(--spacing-md);
}

.article-body h3 {
    font-size: 1.3rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.article-body img {
    max-width: 100%;
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-md);
}

.article-body ul,
.article-body ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.article-body li {
    margin-bottom: var(--spacing-sm);
    list-style: disc;
}

.article-body ol li {
    list-style: decimal;
}

.article-body a {
    color: var(--primary-color);
    text-decoration: underline;
}

.article-body a:hover {
    color: var(--primary-dark);
}

.article-body blockquote {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-gray-50);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    font-style: italic;
}

/* 文章标签 */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.article-tags span {
    color: var(--text-muted);
    margin-right: var(--spacing-sm);
}

/* 相关文章 */
.related-articles {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 2px solid var(--border-light);
}

.related-articles h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
}

.related-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.related-item {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.related-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.related-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.related-item h4 {
    padding: var(--spacing-md);
    font-size: 0.95rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 关于我们页面 ==================== */
.about-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 100px 0;
    text-align: center;
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="80" r="15" fill="rgba(255,255,255,0.05)"/><circle cx="80" cy="20" r="20" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 200px;
}

.about-hero .container {
    position: relative;
}

.about-hero h1 {
    font-size: 2.5rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.about-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 公司介绍 */
.about-intro {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.about-intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-intro-text h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
}

.about-intro-text h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

.about-intro-text p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-intro-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-intro-image img {
    width: 100%;
    height: 350px;
    object-fit: cover;
}

/* 核心优势 */
.about-advantages {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-gray-50);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.advantage-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--bg-white) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    transition: transform var(--transition-normal);
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1);
}

.advantage-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 服务流程 */
.about-process {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: var(--spacing-xl) 0;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color);
    z-index: 0;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 0 var(--spacing-md);
}

.step-number {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-lg);
    background: var(--primary-color);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
}

.process-step h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.process-step p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* 数据统计 */
.about-stats {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    color: var(--text-white);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-family-heading);
}

.stat-unit {
    font-size: 1.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==================== 联系我们页面 ==================== */
.contact-hero {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    padding: 100px 0;
    text-align: center;
    color: var(--text-white);
}

.contact-hero h1 {
    font-size: 2.5rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.contact-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 联系方式 */
.contact-info-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-gray-50);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.contact-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-lg);
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.contact-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-card a {
    color: var(--primary-color);
    font-weight: 600;
}

.contact-card a:hover {
    color: var(--primary-dark);
}

/* 联系表单 */
.contact-form-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.contact-form-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-3xl);
}

.contact-form {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: inline-block;
}

.form-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-color);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-group label .required {
    color: var(--danger-color);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-submit {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xl);
}

.form-submit p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 地图占位 */
.contact-map {
    background: var(--bg-gray-100);
    border-radius: var(--radius-lg);
    height: 100%;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--spacing-md);
}

.map-placeholder {
    width: 80px;
    height: 80px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.map-placeholder span {
    font-size: 2.5rem;
}

.contact-map p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ==================== 404页面 ==================== */
.error-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-3xl);
}

.error-content {
    max-width: 500px;
}

.error-code {
    font-size: 8rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: var(--spacing-lg);
}

.error-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.error-desc {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

.error-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ==================== 滚动动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

/* 滚动显示 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .hot-services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }
    
    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-intro-content {
        grid-template-columns: 1fr;
    }
    
    .about-intro-image {
        order: -1;
    }
    
    .contact-form-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-map {
        min-height: 300px;
    }
    
    .related-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 移动设备 (481px - 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    /* Header */
    .main-nav {
        display: none;
    }
    
    .header-contact {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-nav {
        display: block;
    }
    
    /* Hero */
    .hero {
        height: auto;
        min-height: 500px;
        padding: var(--spacing-3xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-search {
        flex-direction: column;
        border-radius: var(--radius-lg);
    }
    
    .search-input {
        border-radius: var(--radius-lg);
    }
    
    .search-btn {
        border-radius: var(--radius-lg);
    }
    
    /* 服务分类 */
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .service-card {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .service-icon {
        font-size: 2.5rem;
    }
    
    .service-name {
        font-size: 1rem;
    }
    
    /* 热门服务 */
    .hot-services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .hot-service-img {
        height: 140px;
    }
    
    .hot-service-info {
        padding: var(--spacing-md);
    }
    
    .hot-service-info h4 {
        font-size: 1rem;
    }
    
    /* 维修知识 */
    .knowledge-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .knowledge-img {
        height: 180px;
    }
    
    /* 客户评价 */
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* CTA */
    .cta-box {
        padding: var(--spacing-2xl);
    }
    
    .cta-box h2 {
        font-size: 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .float-contact {
        bottom: 80px;
        right: 15px;
    }
    
    .float-btn {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    /* 面包屑 */
    .breadcrumb {
        font-size: 0.85rem;
    }
    
    /* 页面标题 */
    .page-header {
        padding: 100px 0 50px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    /* 内容布局 */
    .content-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    /* 文章列表 */
    .article-link {
        flex-direction: column;
    }
    
    .article-img {
        width: 100%;
        height: 200px;
    }
    
    /* 分页 */
    .pagination a,
    .pagination span {
        min-width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    /* 关于我们 */
    .about-hero {
        padding: 80px 0;
    }
    
    .about-hero h1 {
        font-size: 2rem;
    }
    
    .about-intro-text h2 {
        font-size: 1.6rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .process-timeline {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .process-timeline::before {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    /* 联系我们 */
    .contact-hero {
        padding: 80px 0;
    }
    
    .contact-hero h1 {
        font-size: 2rem;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* 相关文章 */
    .related-list {
        grid-template-columns: 1fr;
    }
    
    /* 文章详情 */
    .article-header h1 {
        font-size: 1.5rem;
    }
    
    .article-meta-detail {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .article-body {
        font-size: 1rem;
    }
}

/* 小屏手机 (320px - 480px) */
@media (max-width: 480px) {
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 24px;
        --spacing-2xl: 32px;
        --spacing-3xl: 48px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Hero */
    .hero {
        min-height: 450px;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-tags {
        font-size: 0.85rem;
    }
    
    /* 服务分类 */
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .service-card {
        padding: var(--spacing-md);
    }
    
    .service-icon {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .service-name {
        font-size: 0.95rem;
    }
    
    .service-desc {
        font-size: 0.8rem;
        display: none;
    }
    
    /* 热门服务 */
    .hot-services-grid {
        grid-template-columns: 1fr;
    }
    
    .hot-service-img {
        height: 160px;
    }
    
    /* 客户评价 */
    .testimonial-card {
        padding: var(--spacing-lg);
    }
    
    /* Footer */
    .footer-section h3 {
        font-size: 1rem;
    }
    
    .footer-links {
        gap: var(--spacing-md);
    }
    
    /* 侧边栏 */
    .sidebar {
        grid-template-columns: 1fr;
    }
    
    /* 文章 */
    .article-img {
        height: 160px;
    }
    
    .article-title {
        font-size: 1.05rem;
    }
    
    /* 关于我们 */
    .about-hero h1 {
        font-size: 1.6rem;
    }
    
    .about-intro-text h2 {
        font-size: 1.4rem;
    }
    
    .advantage-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
    }
    
    /* 联系我们 */
    .contact-card {
        padding: var(--spacing-lg);
    }
    
    .contact-card-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    /* 404 */
    .error-code {
        font-size: 5rem;
    }
    
    .error-title {
        font-size: 1.3rem;
    }
    
    /* 悬浮按钮 */
    .float-contact {
        bottom: 70px;
        right: 10px;
    }
    
    .float-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .site-header,
    .site-footer,
    .float-contact,
    .breadcrumb,
    .sidebar,
    .related-articles,
    .article-tags,
    .form-submit {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
    }
    
    .article-body {
        font-size: 12pt;
        line-height: 1.6;
    }
    
    a {
        color: var(--text-primary);
        text-decoration: underline;
    }
}

/* ==================== 辅助类 ==================== */
.text-center {
    text-align: center;
}

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

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-5 { padding-top: var(--spacing-3xl); }
.pb-0 { padding-bottom: 0; }
.pb-5 { padding-bottom: var(--spacing-3xl); }

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* 图片懒加载占位 */
img[lazy="loading"] {
    background: var(--bg-gray-100);
}

/* 链接访问样式 */
a:visited {
    color: var(--primary-dark);
}

/* Focus 样式（无障碍） */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 禁用滚动条（不影响布局） */
.no-scrollbar::-webkit-scrollbar {
    display: none;
}

.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}