/* ========================================
   西安荣辉标识 - 企业官网样式表
   配色方案：中国红商务风
   主色：#CC0000 (中国红) | 辅色：#FFD700 (金色) | 深色：#1a1a1a | 背景：#f5f5f5
   ======================================== */

/* ===== CSS变量定义 ===== */
:root {
    /* 主色调 - 中国红 */
    --primary: #CC0000;
    --primary-dark: #990000;
    --primary-light: #FF3333;
    
    /* 强调色 - 金色 */
    --accent: #FFD700;
    --accent-light: #FFEC8B;
    --accent-dark: #DAA520;
    
    /* 中性色 */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* 深色背景 */
    --dark-bg: #1a1a1a;
    --dark-bg-light: #2d2d2d;
    
    /* 功能色 */
    --success: #059669;
    --warning: #d97706;
    --error: #dc2626;
    
    /* 字体 */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-heading: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 间距 */
    --section-padding: 100px;
    --container-max: 1280px;
    --container-padding: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 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: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

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

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

/* ===== 通用类 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.section-gray {
    background-color: var(--gray-50);
}

.section-dark {
    background-color: var(--primary);
    color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 16px;
    line-height: 1.2;
    text-align: center;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #CC0000, #FF3333);
    margin: 20px auto 0;
    border-radius: 2px;
}

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

.section-subtitle {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-subtitle {
    color: var(--gray-300);
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #CC0000 0%, #990000 100%);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(204, 0, 0, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(204, 0, 0, 0.5);
}

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

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

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 16px;
}

/* ===== 顶部信息栏 ===== */
.top-bar {
    background: #1a1a1a;
    color: var(--gray-300);
    font-size: 13px;
    padding: 10px 0;
}

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

.top-bar-left {
    display: flex;
    gap: 24px;
}

.top-bar-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar-item i {
    color: var(--accent);
    font-size: 14px;
}

.top-bar-right {
    display: flex;
    gap: 16px;
}

.top-bar a:hover {
    color: var(--accent);
}

/* 社交二维码悬停样式 */
.social-qr {
    position: relative;
    display: inline-block;
    z-index: 10000;
}

.social-qr .qr-code {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 10px;
    background: var(--white);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: none;
    z-index: 99999;
    min-width: 140px;
}

.social-qr:hover .qr-code {
    display: block;
}

.social-qr .qr-code img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 4px;
}

.social-qr .qr-code .qr-text {
    text-align: center;
    margin-top: 8px;
    font-size: 12px;
    color: var(--gray-600);
}

/* ===== 主导航 ===== */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #CC0000 0%, #FF3333 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.logo-text span {
    color: var(--accent);
}

.main-nav {
    display: flex;
    gap: 40px;
}

.main-nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
    position: relative;
    padding: 8px 0;
}

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

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

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--gray-50);
    border-radius: var(--radius-full);
}

.phone-icon {
    width: 40px;
    height: 40px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 16px;
}

.phone-info {
    display: flex;
    flex-direction: column;
}

.phone-label {
    font-size: 12px;
    color: var(--gray-500);
}

.phone-number {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
}

/* ===== 头部咨询按钮 ===== */
.header-call-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent), #d4a520);
    color: var(--white);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(201, 162, 39, 0.4);
}

.header-call-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(201, 162, 39, 0.5);
}

/* ===== Hero区域 ===== */
.hero {
    position: relative;
    min-height: 600px;
    padding: 120px 0 200px;
    background: linear-gradient(135deg, #1a1a1a 0%, #CC0000 50%, #FF3333 100%);
    overflow: hidden;
}

.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="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></svg>');
    background-size: 100px 100px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
    padding-top: 40px;
}

.hero-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 20px;
    padding: 8px 16px;
    background: rgba(201, 162, 39, 0.15);
    border-radius: var(--radius-full);
    border: 1px solid rgba(201, 162, 39, 0.3);
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-title span {
    color: var(--accent);
}

.hero-desc {
    font-size: 18px;
    color: var(--gray-300);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons, .banner-btns {
    display: flex;
    gap: 16px;
    margin-bottom: 30px;
}

.banner-features {
    display: flex;
    gap: 24px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.banner-features span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
}

.banner-features span i {
    color: var(--accent);
}

.hero-stats {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stats .container {
    display: flex;
    justify-content: space-around;
    padding: 40px 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-300);
    margin-top: 8px;
}

/* ===== 核心业务区块 ===== */
.core-business {
    padding: 100px 0;
    background-color: var(--gray-100);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.business-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.business-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #CC0000 0%, #FF3333 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--white);
    font-size: 32px;
}

.business-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.business-card p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ===== 关于我们区块 ===== */
.about-section {
    padding: 100px 0;
    background-color: var(--gray-50);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-images {
    position: relative;
}

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

.about-main-img img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.about-sub-img {
    position: absolute;
    bottom: -40px;
    right: -40px;
    width: 280px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 8px solid var(--white);
}

.about-sub-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.about-text h3 {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.about-text h3 span {
    color: var(--primary);
}

.about-text p {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-feature-item i {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 16px;
}

.about-feature-item span {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
}

.about-stats {
    display: flex;
    gap: 40px;
    margin: 40px 0;
    padding: 30px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.about-stats .stat-item h4 {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.about-stats .stat-item p {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 0;
}

.mt-40 {
    margin-top: 40px;
}

/* ===== 产品展示区块 ===== */
.products-section {
    padding: 100px 0;
    background-color: var(--gray-100);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-img {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-img i {
    font-size: 56px;
    color: rgba(255,255,255,0.25);
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(204, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-overlay a {
    color: var(--white);
    font-size: 24px;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.product-info p {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.product-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
}

.product-link:hover {
    color: var(--accent);
}

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

/* ===== 为什么选择我们 ===== */
.why-us {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.why-us .section-title {
    color: var(--white);
}

.why-us .section-title::after {
    background: var(--accent);
}

.why-us .section-subtitle {
    color: var(--gray-400);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.why-card {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.why-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.why-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--white);
    font-size: 32px;
}

.why-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.why-card p {
    font-size: 15px;
    color: var(--gray-400);
    line-height: 1.7;
}

/* ===== 工程案例区块 ===== */
.cases-section {
    padding: 100px 0;
    background-color: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 4/3;
}

.case-img {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-img i {
    font-size: 72px;
    color: rgba(255,255,255,0.25);
}

.case-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.case-tag {
    position: absolute;
    top: 20px;
    left: 20px;
    background: var(--accent);
    color: var(--gray-900);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(204, 0, 0, 0.95) 0%, transparent 100%);
}

.case-overlay h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.case-overlay p {
    font-size: 14px;
    color: var(--gray-300);
}

/* ===== 服务流程区块 ===== */
.process-section {
    padding: 100px 0;
    background-color: var(--gray-50);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(to right, var(--gray-200) 0%, var(--primary) 50%, var(--gray-200) 100%);
}

.process-step {
    text-align: center;
    width: 14%;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--white);
    border: 4px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    box-shadow: var(--shadow-lg), 0 0 0 4px rgba(196, 30, 58, 0.15);
}

.process-step h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 13px;
    color: var(--gray-500);
}

/* ===== 底部 ===== */
.main-footer {
    background: #1a1a1a;
    color: var(--gray-300);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-about h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-about p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-contact-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    margin-bottom: 12px;
}

.footer-contact-info i {
    color: var(--accent);
    width: 20px;
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 15px;
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 8px;
}

.footer-qr img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.footer-qr p {
    font-size: 14px;
    color: var(--gray-400);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--gray-500);
}

.footer-bottom a {
    color: var(--gray-400);
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .business-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    :root {
        --section-padding: 80px;
    }
    
    .main-nav {
        display: none;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-sub-img {
        display: none;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .process-steps::before {
        display: none;
    }
    
    .process-step {
        width: 45%;
    }
}

@media (max-width: 768px) {
    .top-bar-left {
        display: none;
    }
    
    .header-phone {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 100px 0 140px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-stats .container {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .stat-item {
        width: 45%;
    }
    
    .business-grid,
    .products-grid,
    .why-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .process-step {
        width: 100%;
    }
}

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

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

/* ===== 打印样式 ===== */
@media print {
    .top-bar,
    .main-header,
    .main-footer,
    .hero-stats,
    .back-to-top {
        display: none;
    }
    
    .hero {
        height: auto;
        padding: 40px 0;
    }
    
    .section {
        padding: 40px 0;
    }
}

/* ===== 页面标题区（通用内页Banner） ===== */
.page-banner {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary) 50%, var(--primary-light) 100%);
    padding: 100px 0 80px;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
    pointer-events: none;
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--white);
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.page-banner h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.page-banner p {
    font-size: 18px;
    opacity: 0.9;
    position: relative;
    z-index: 2;
}

/* ===== 面包屑导航 ===== */
.breadcrumb-bar {
    background: var(--gray-100);
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-200);
}

.breadcrumb-bar .container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-600);
}

.breadcrumb-bar a {
    color: var(--gray-600);
    transition: color 0.2s;
}

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

.breadcrumb-bar i {
    font-size: 10px;
    color: var(--gray-400);
}

.breadcrumb-bar span {
    color: var(--primary);
    font-weight: 600;
}

/* ===== 通用区块 ===== */
.sec {
    padding: var(--section-padding) 0;
}

.sec-white {
    background: var(--white);
}

.sec-gray {
    background: var(--gray-100);
}

.sec-dark {
    background: var(--dark-bg);
    color: var(--white);
}

/* ===== 内页通用标题 ===== */
.sec-title {
    text-align: center;
    margin-bottom: 60px;
}

.sec-title h2 {
    font-size: 42px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.sec-title p {
    font-size: 18px;
    color: var(--gray-600);
}

.sec-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ===== 通用网格布局 ===== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ===== 文章详情页面 ===== */
.article-detail-section {
    padding: 60px 0;
    background: var(--gray-50);
}

.article-detail-section .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.article-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.article-header {
    padding: 40px;
    border-bottom: 1px solid var(--gray-200);
}

.article-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.4;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: var(--gray-600);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-meta i {
    color: var(--primary);
}

.article-cover {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
}

.article-body {
    padding: 40px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray-700);
}

.article-body p {
    margin-bottom: 20px;
    text-align: justify;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 30px 0 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-800);
    margin: 25px 0 12px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
    border-radius: var(--radius);
}

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

.article-body ul, .article-body ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

.article-body li {
    margin-bottom: 8px;
}

.related-articles {
    margin-top: 40px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 30px;
}

.related-articles h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--gray-200);
}

.related-articles ul {
    list-style: none;
    padding: 0;
}

.related-articles li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--gray-200);
    transition: var(--transition);
}

.related-articles li:last-child {
    border-bottom: none;
}

.related-articles li:hover {
    padding-left: 10px;
}

.related-articles a {
    color: var(--gray-700);
    font-size: 15px;
    transition: color 0.2s;
}

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

.article-navigation {
    margin-top: 30px;
    text-align: center;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-back:hover {
    background: var(--primary-dark);
    transform: translateX(-3px);
}

@media (max-width: 768px) {
    .article-detail-section {
        padding: 30px 0;
    }
    
    .article-header {
        padding: 20px;
    }
    
    .article-header h1 {
        font-size: 24px;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 10px;
    }
    
    .article-body {
        padding: 20px;
        font-size: 15px;
    }
    
    .related-articles {
        padding: 20px;
    }
}