/* ===================================
   天马之都 - 品牌展示网站样式表
   设计规范基于PRD v1.0
   =================================== */

/* === CSS变量定义 === */
:root {
    /* 色彩方案 */
    --primary: #0A2E5C;        /* 主色调：深蓝 */
    --secondary: #1E5FBF;      /* 辅助色：科技蓝 */
    --accent: #FF7A3D;         /* 强调色：活力橙 */
    --white: #FFFFFF;           /* 白色 */
    --light-gray: #F5F5F5;     /* 浅灰背景 */
    --text-dark: #333333;       /* 深色文字 */
    --text-gray: #666666;       /* 辅助文字 */
    --border-color: #E0E0E0;   /* 边框颜色 */
    
    /* 字体规范 */
    --font-title: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    --font-body: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    
    /* 字体大小 */
    --h1-size: 56px;
    --h2-size: 40px;
    --h3-size: 28px;
    --body-size: 16px;
    --small-size: 14px;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    
    /* 过渡动画 */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--body-size);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

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

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

/* === 排版 === */
h1, h2, h3, h4 {
    font-family: var(--font-title);
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--h1-size); }
h2 { font-size: var(--h2-size); }
h3 { font-size: var(--h3-size); }
h4 { font-size: 20px; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-gray);
}

.lead {
    font-size: 18px;
    color: var(--text-dark);
    line-height: 1.8;
}

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

/* === 按钮样式 === */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: #FF925C;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(255, 122, 61, 0.3);
    transform: translateY(-2px);
}

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

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

.btn-sm {
    padding: 10px 24px;
    font-size: 14px;
}

.btn-full {
    width: 100%;
}

.btn-phone {
    background-color: var(--accent);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.btn-phone:hover {
    background-color: #FF925C;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(255, 122, 61, 0.3);
}

/* === Header 顶部导航 === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-normal);
}

.header.scrolled {
    background-color: var(--primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo h1 {
    color: var(--white);
    font-size: 28px;
    margin: 0;
}

.nav-desktop ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-desktop a {
    color: var(--white);
    font-weight: 500;
    padding: 8px 16px;
    transition: color var(--transition-fast);
}

.nav-desktop a:hover,
.nav-desktop a.active {
    color: var(--accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--white);
    transition: all var(--transition-fast);
}

.nav-mobile {
    display: none;
    background-color: var(--primary);
    padding: var(--spacing-sm);
}

.nav-mobile.active {
    display: block;
}

.nav-mobile ul {
    list-style: none;
}

.nav-mobile a {
    display: block;
    color: var(--white);
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: color var(--transition-fast);
}

.nav-mobile a:hover {
    color: var(--accent);
}

/* === Hero 首屏区域 === */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 46, 92, 0.7);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    padding: 0 var(--spacing-sm);
}

.hero-title {
    font-size: var(--h1-size);
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* === 业务概览区 === */
.services-overview {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.section-desc {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

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

.service-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.service-icon {
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    margin-bottom: var(--spacing-sm);
}

.card-link {
    color: var(--accent);
    font-weight: 600;
}

/* === 精选案例区 === */
.featured-projects {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-gray);
}

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

.project-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.project-image {
    height: 240px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.project-info {
    padding: var(--spacing-md);
}

.project-info h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.project-info p {
    margin-bottom: var(--spacing-sm);
}

/* === 数据统计区 === */
.stats-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
}

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

.stat-item {
    opacity: 0;
    transform: translateY(30px);
}

.stat-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
}

/* === Page Banner === */
.page-banner {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    text-align: center;
}

.page-banner h1 {
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.page-banner p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
}

/* === 关于我们页面 === */
.about-section {
    padding: var(--spacing-xl) 0;
}

.about-content {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
}

.about-text {
    margin-top: var(--spacing-md);
}

.qual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.qual-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: 8px;
}

.qual-icon {
    margin-bottom: var(--spacing-sm);
}

.qual-item h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.step {
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    font-size: 36px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.step h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

/* === 业务展示页面 === */
.service-detail {
    padding: var(--spacing-xl) 0;
}

.service-detail.alt-bg {
    background-color: var(--light-gray);
}

.service-detail-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.service-icon-large {
    margin-bottom: var(--spacing-md);
}

.service-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.info-block {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.info-block h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.info-block ul {
    list-style: none;
}

.info-block li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-gray);
}

.info-block li:last-child {
    border-bottom: none;
}

.cta-block {
    margin-top: var(--spacing-lg);
}

/* === 工程示例页面 === */
.projects-filter {
    padding: var(--spacing-md) 0;
    background-color: var(--light-gray);
}

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

.filter-btn {
    padding: 10px 24px;
    border: 2px solid var(--border-color);
    background: var(--white);
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: all var(--transition-fast);
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}

.projects-list {
    padding: var(--spacing-xl) 0;
}

.projects-grid-full {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.project-card-full {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
}

.project-card-full.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card-full:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.project-image-full {
    height: 250px;
    overflow: hidden;
}

.project-image-full img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-info-full {
    padding: var(--spacing-md);
}

.project-category {
    display: inline-block;
    background-color: var(--secondary);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    margin-bottom: var(--spacing-xs);
}

.project-info-full h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

/* === 项目详情页面 === */
.project-detail {
    padding: var(--spacing-xl) 0;
}

.project-detail-content {
    max-width: 900px;
    margin: 0 auto;
}

.project-title {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.project-tag {
    display: inline-block;
    background-color: var(--accent);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: var(--spacing-md);
}

.project-media {
    margin: var(--spacing-md) 0;
}

.main-image {
    margin-bottom: var(--spacing-sm);
}

.main-image img {
    width: 100%;
    border-radius: 8px;
}

.media-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.media-gallery img {
    width: 100%;
    border-radius: 4px;
    cursor: pointer;
}

.project-video {
    margin: var(--spacing-md) 0;
}

.video-placeholder {
    background: var(--light-gray);
    padding: var(--spacing-lg);
    text-align: center;
    border-radius: 8px;
}

.project-description {
    margin: var(--spacing-lg) 0;
}

.project-description h3 {
    color: var(--primary);
    margin-top: var(--spacing-md);
}

.project-description ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.project-description li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-gray);
}

.project-links {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: 8px;
}

.project-links ul {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.project-links li {
    margin-bottom: var(--spacing-xs);
}

/* === 评论区 === */
.comments-section {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: 8px;
}

.comment-notice {
    color: var(--text-gray);
    font-size: var(--small-size);
    margin-bottom: var(--spacing-md);
}

.comment-form {
    margin: var(--spacing-md) 0;
}

.comment-form h4 {
    margin-bottom: var(--spacing-sm);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.required {
    color: #E53935;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    font-family: var(--font-body);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary);
}

.comments-list {
    margin-top: var(--spacing-md);
}

.comment-item,
.comment-reply {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: var(--white);
    border-radius: 4px;
}

.comment-reply {
    margin-left: var(--spacing-md);
    background: #FFF9F5;
}

.comment-author,
.reply-author {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.comment-date,
.reply-date {
    font-size: 12px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

/* === 联系我们页面 === */
.contact-section {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-info h2,
.contact-form h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.info-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.info-icon {
    flex-shrink: 0;
}

.info-item h4 {
    color: var(--primary);
    margin-bottom: 4px;
}

.info-detail {
    font-size: var(--small-size);
    color: var(--text-gray);
}

.contact-form p {
    margin-bottom: var(--spacing-md);
}

.form-success {
    text-align: center;
    padding: var(--spacing-lg);
    background: #F1F8E9;
    border-radius: 8px;
}

.success-icon {
    font-size: 48px;
    color: #4CAF50;
    margin-bottom: var(--spacing-sm);
}

.map-section {
    margin: var(--spacing-xl) 0;
}

.map-section h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.map-container {
    border-radius: 8px;
    overflow: hidden;
}

.map-placeholder {
    background: var(--light-gray);
    padding: var(--spacing-xl);
    text-align: center;
}

.social-section {
    margin: var(--spacing-xl) 0;
}

.social-section h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.social-contact {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.social-item:hover {
    background: #FFEDE5;
}

.social-icon {
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* === CTA Section === */
.cta-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
}

/* === Footer === */
.footer {
    background-color: var(--primary);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer h3,
.footer h4 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer p,
.footer a {
    color: rgba(255, 255, 255, 0.8);
}

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

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent);
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--small-size);
}

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

/* === 响应式设计 === */

/* 平板设备 */
@media (max-width: 1023px) {
    :root {
        --h1-size: 40px;
        --h2-size: 32px;
        --h3-size: 24px;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .qual-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-info-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid-full {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 移动端设备 */
@media (max-width: 767px) {
    .nav-desktop,
    .header-contact {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .qual-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .media-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .social-contact {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-buttons {
        flex-wrap: wrap;
    }
}

/* === 滚动动画类 === */
.aos-init {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.aos-animate {
    opacity: 1;
    transform: translateY(0);
}


/* ===================================
   服务与支持页面样式
   =================================== */

.support-section {
    padding: 80px 0;
    background: var(--white, #fff);
}

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

.support-content .lead {
    text-align: center;
    font-size: 18px;
    color: var(--text-gray, #666);
    margin-bottom: 50px;
}

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

.support-card {
    background: var(--light-gray, #f5f5f5);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.support-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
}

.support-card-icon {
    margin-bottom: 20px;
}

.support-card h3 {
    font-size: 22px;
    color: var(--primary, #0A2E5C);
    margin-bottom: 20px;
}

.qr-placeholder {
    margin: 20px auto;
}

.qr-box {
    width: 160px;
    height: 160px;
    background: #fff;
    border: 2px dashed var(--secondary, #1E5FBF);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    cursor: pointer;
    transition: border-color 0.3s;
}

.qr-box:hover {
    border-color: var(--accent, #FF7A3D);
}

.qr-icon {
    margin-bottom: 8px;
    opacity: 0.6;
}

.qr-hint {
    font-size: 13px;
    color: var(--text-gray, #666);
    margin: 0;
}

.steps-list {
    text-align: left;
    max-width: 250px;
    margin: 0 auto;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.step-tag {
    display: inline-flex;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--secondary, #1E5FBF);
    color: #fff;
    font-size: 14px;
    font-weight: bold;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-item p {
    margin: 0;
    font-size: 15px;
    color: var(--text-dark, #333);
    line-height: 28px;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
    max-width: 200px;
    margin: 0 auto;
}

.feature-list li {
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-dark, #333);
    border-bottom: 1px solid var(--border-color, #e0e0e0);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '\2714';
    color: var(--accent, #FF7A3D);
    margin-right: 8px;
    font-weight: bold;
}

.contact-info-section {
    padding: 60px 0;
    background: var(--light-gray, #f5f5f5);
}

.contact-info-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-info-box .lead {
    color: var(--text-gray, #666);
    margin-bottom: 40px;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.method-item {
    background: #fff;
    border-radius: 12px;
    padding: 25px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.method-item h4 {
    font-size: 16px;
    color: var(--primary, #0A2E5C);
    margin-bottom: 10px;
}

.method-item p {
    font-size: 14px;
    color: var(--text-gray, #666);
    margin: 0;
}

.method-item a {
    color: var(--secondary, #1E5FBF);
    text-decoration: none;
}

.method-item a:hover {
    color: var(--accent, #FF7A3D);
}

@media (max-width: 768px) {
    .support-grid {
        grid-template-columns: 1fr;
    }
    .contact-methods {
        grid-template-columns: 1fr;
    }
}


/* 二维码图片样式 */
.qr-image {
    width: 180px;
    height: 180px;
    border: 2px solid var(--secondary, #1E5FBF);
    border-radius: 12px;
    display: block;
    margin: 0 auto;
    transition: transform 0.3s, border-color 0.3s;
    object-fit: contain;
    background: #fff;
}

.qr-image:hover {
    transform: scale(1.05);
    border-color: var(--accent, #FF7A3D);
}


/* 二维码图片样式 */
.qr-image {
    width: 180px;
    height: 180px;
    border: 2px solid var(--secondary, #1E5FBF);
    border-radius: 12px;
    display: block;
    margin: 0 auto;
    transition: transform 0.3s, border-color 0.3s;
    object-fit: contain;
    background: #fff;
}

.qr-image:hover {
    transform: scale(1.05);
    border-color: var(--accent, #FF7A3D);
}