/* ========================================
   安得家政官网 - 主样式表
   ======================================== */

/* CSS 变量定义 */
:root {
    --primary-color: #4DAF9A;
    --primary-dark: #3D9484;
    --primary-light: #E8F5F1;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFB;
    --border-color: #E5E5E5;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans", sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

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

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 通用区块样式 */
.section {
    padding: 100px 0;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.section-divider span {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.section-header.left-align .section-divider {
    justify-content: flex-start;
}

.divider-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 5px 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    padding: 6px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 100%;
}

/* Logo图片样式 - 桌面端默认 */
.logo-img {
    height: 180px;
    width: auto;
    display: block;
    transition: filter var(--transition-normal);
}

/* 导航栏中的logo - 白色logo在深色背景上 */
.nav-logo .logo-img {
    height: 180px !important;
    filter: brightness(0) invert(1);
}

/* 平板端 Logo 尺寸 */
@media (max-width: 1024px) {
    .nav-logo .logo-img {
        height: 70px !important;
    }
}

/* 移动端 Logo 尺寸 */
@media (max-width: 768px) {
    .nav-logo .logo-img {
        height: 50px !important;
    }
}

/* 导航栏滚动后 - 将白色logo转换为主题色 */
.navbar.scrolled .nav-logo .logo-img {
    filter: brightness(0) saturate(100%) invert(58%) sepia(45%) saturate(450%) hue-rotate(118deg) brightness(95%) contrast(87%);
}

/* Footer中的logo */
.footer-logo-img {
    height: 30px;
    filter: brightness(0) saturate(100%) invert(58%) sepia(45%) saturate(450%) hue-rotate(118deg) brightness(95%) contrast(87%);
}

/* 关于我们区域的logo */
.about-logo-img {
    height: 50px;
    filter: brightness(0) saturate(100%) invert(58%) sepia(45%) saturate(450%) hue-rotate(118deg) brightness(95%) contrast(87%);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bg-white);
    transition: color var(--transition-normal);
}

.navbar.scrolled .logo-text {
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--bg-white);
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.navbar.scrolled .nav-link {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--bg-white);
    transition: width var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--bg-white);
}

/* 滚动后导航栏 - active状态使用主题绿色 */
.navbar.scrolled .nav-link::after {
    background: var(--primary-color);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--primary-color);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.bar {
    width: 24px;
    height: 2px;
    background: var(--bg-white);
    transition: all var(--transition-fast);
}

.navbar.scrolled .bar {
    background: var(--text-primary);
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Banner 区域
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.deco-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.deco-circle-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
}

.deco-circle-2 {
    width: 300px;
    height: 300px;
    bottom: -50px;
    left: -50px;
}

.deco-circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 20%;
    background: rgba(255, 255, 255, 0.05);
}

.wave-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
}

.wave-decoration svg {
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 20px;
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: 20px;
    line-height: 1.2;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    animation: bounce 2s infinite;
}

.scroll-down svg {
    width: 24px;
    height: 24px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   服务项目区域
   ======================================== */
.services {
    background: var(--bg-white);
}

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

.service-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.service-icon svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--primary-color);
}

.service-card:hover .service-icon svg {
    color: var(--bg-white);
}

.service-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   公司优势区域
   ======================================== */
.advantages {
    background: var(--primary-light);
}

.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 80px;
    padding: 40px;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

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

.stat-number {
    display: inline;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-suffix {
    display: inline;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.advantage-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 30px;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.advantage-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
}

.advantage-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.advantage-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    white-space: nowrap;
}

.advantage-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   关于我们区域
   ======================================== */
.about {
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.value-card {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.value-card:hover {
    background: var(--primary-light);
    transform: translateY(-4px);
}

.value-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.value-icon svg {
    width: 32px;
    height: 32px;
}

.value-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.value-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.about-graphic {
    position: relative;
    width: 400px;
    height: 400px;
}

.graphic-circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid var(--primary-light);
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: 0;
    left: 0;
    animation: pulse 3s ease-in-out infinite;
}

.circle-2 {
    width: 300px;
    height: 300px;
    top: 50px;
    left: 50px;
    animation: pulse 3s ease-in-out infinite 0.5s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    top: 100px;
    left: 100px;
    animation: pulse 3s ease-in-out infinite 1s;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

.graphic-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

/* 关于我们区域logo图片响应式 */
@media (max-width: 1024px) {
    .about-logo-img {
        height: 40px;
    }
}

@media (max-width: 768px) {
    .footer-logo-img {
        height: 28px;
    }
    
    .about-logo-img {
        height: 36px;
    }
}

.center-text {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* ========================================
   联系我们区域
   ======================================== */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.info-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    height: 100%;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.info-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
}

.info-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

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

.info-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.contact-form-wrapper {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-white);
    transition: border-color var(--transition-fast);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    background: var(--primary-color);
    color: var(--bg-white);
    border: none;
    padding: 16px 32px;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ========================================
   Footer 底部
   ======================================== */
.footer {
    background: #2D3436;
    color: var(--bg-white);
    padding: 80px 0 0;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--bg-white);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   返回顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   滚动动画
   ======================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

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

/* 平板 (768px - 1024px) */
@media (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-visual {
        order: -1;
    }
    
    .about-graphic {
        width: 300px;
        height: 300px;
    }
    
    .circle-1 {
        width: 300px;
        height: 300px;
    }
    
    .circle-2 {
        width: 220px;
        height: 220px;
        top: 40px;
        left: 40px;
    }
    
    .circle-3 {
        width: 140px;
        height: 140px;
        top: 80px;
        left: 80px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    
    .footer-column:first-child {
        grid-column: 1 / -1;
    }
}

/* 手机 (< 768px) */
@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    /* 导航栏 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 0;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-item {
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link {
        display: block;
        padding: 16px 0;
        color: var(--text-primary);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero */
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .btn {
        width: 100%;
    }
    
    /* 服务卡片 */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    
    /* 数据统计 */
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 30px 20px;
        margin-bottom: 50px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-suffix {
        font-size: 1.5rem;
    }
    
    /* 优势卡片 */
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .advantage-card {
        padding: 24px;
    }
    
    /* 关于我们 */
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .about-graphic {
        width: 250px;
        height: 250px;
    }
    
    .circle-1 {
        width: 250px;
        height: 250px;
    }
    
    .circle-2 {
        width: 180px;
        height: 180px;
        top: 35px;
        left: 35px;
    }
    
    .circle-3 {
        width: 110px;
        height: 110px;
        top: 70px;
        left: 70px;
    }
    
    /* 联系表单 */
    .info-card,
    .contact-form-wrapper {
        padding: 24px;
    }
    
    .info-item {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-contact li {
        justify-content: center;
    }
    
    /* 返回顶部 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .stat-suffix {
        font-size: 1.25rem;
    }
}