/* ==============================================================================
   Apple 风格网站样式表
   版本：优化整理版
   作者：DeepSeek
   日期：2023-12-13
   ============================================================================== */

/* ==============================================================================
   1. 全局变量定义 (Apple风格配色)
   ============================================================================== */
:root {
    /* 主色调 */
    --primary-color: #0F265C; 
    --primary-hover: #1a3a8a;
    --hero-blue: #8AB4F8;
    
    /* 文字颜色 */
    --text-dark: #1D1D1F; 
    --text-medium: #424245; 
    --text-light: #86868b; 
    
    /* 背景色 */
    --bg-white: #FFFFFF;
    --bg-light: #F5F5F7; 
    --bg-footer: #1D1D1F; 
    
    /* 间距与尺寸 */
    --section-spacing: 120px; 
    --container-width: 1100px; 
    --border-radius-lg: 24px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;
}

/* ==============================================================================
   2. 基础重置与通用样式
   ============================================================================== */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

html { 
    scroll-behavior: smooth; 
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { 
    text-decoration: none; 
    color: inherit; 
    transition: color 0.3s ease; 
}

ul { 
    list-style: none; 
}

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

/* ==============================================================================
   3. 通用工具类
   ============================================================================== */
.container { 
    width: 90%; 
    max-width: var(--container-width); 
    margin: 0 auto; 
}

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

.bg-light { 
    background-color: var(--bg-light); 
}

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

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

.mx-auto { 
    margin-left: auto; 
    margin-right: auto; 
}

.max-w-800 { 
    max-width: 800px; 
}

.text-medium { 
    color: var(--text-medium); 
}

/* 间距工具类 */
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }
.mt-8 { margin-top: 6rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }
.p-5 { padding: 3rem; }

/* ==============================================================================
   4. 排版与文字样式
   ============================================================================== */
h1, h2, h3, h4 { 
    font-weight: 700; 
    letter-spacing: -0.02em; 
}

.section-title { 
    font-size: 2.5rem; 
    margin-bottom: 1rem; 
    color: var(--text-dark); 
}

.section-description { 
    font-size: 1.125rem; 
    color: var(--text-medium); 
    line-height: 1.6; 
}

.section-overline { 
    text-transform: uppercase; 
    font-size: 0.875rem; 
    font-weight: 600; 
    letter-spacing: 0.05em; 
    color: var(--text-light); 
    margin-bottom: 1rem; 
}

/* ==============================================================================
   5. 按钮样式
   ============================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-blue:hover { 
    background-color: var(--primary-hover); 
    transform: translateY(-2px); 
    box-shadow: 0 10px 20px -10px rgba(15, 38, 92, 0.5); 
}

.btn-text { 
    color: var(--primary-color); 
    background: none; 
    padding-left: 10px; 
    padding-right: 10px; 
}

.btn-text:hover { 
    color: var(--primary-hover); 
}

.btn-sm { 
    padding: 8px 20px; 
    font-size: 0.9rem; 
}

.btn-block { 
    display: flex; 
    width: 100%; 
}

.btn-with-icon { 
    gap: 8px; 
}

.btn-black { 
    background-color: #1D1D1F; 
    color: white; 
    border: none; 
    padding: 16px 30px; 
    font-size: 1.1rem; 
    font-weight: 600; 
}

.btn-black:hover { 
    background-color: #333336; 
    transform: translateY(-2px); 
    box-shadow: 0 10px 20px -10px rgba(0,0,0,0.3); 
}

.btn-light {
    background-color: white;
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-light:hover {
    background-color: #F5F5F7;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(0, 0, 0, 0.3);
    color: var(--primary-hover);
}

.btn-light:active {
    transform: translateY(0);
    transition: transform 0.1s ease;
}

/* ==============================================================================
   6. 导航栏
   ============================================================================== */
.navbar { 
    width: 100%; 
    background-color: rgba(255, 255, 255, 0.9); 
    backdrop-filter: blur(20px); 
    z-index: 1000; 
    border-bottom: 1px solid rgba(0,0,0,0.05); 
    padding: 1rem 0; 
}

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

.logo-link { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    color: var(--primary-color); 
    font-weight: 700; 
    font-size: 1.2rem; 
}

.nav-logo { 
    height: 32px; 
    width: auto; 
}

.nav-links { 
    display: flex; 
    align-items: center; 
    gap: 2rem; 
}

.nav-links a { 
    position: relative;
    font-size: 0.9rem; 
    color: var(--text-dark); 
    font-weight: 500; 
    padding: 8px 4px;
    transition: color 0.35s ease;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.5s ease;
}

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

.nav-links a:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

/* ==============================================================================
   7. 语言切换器 (与整体设计统一)
   ============================================================================== */
.language-switcher-container {
    position: relative;
}

.language-switcher {
    position: relative;
}

/* 当前语言按钮 - 完全融入导航栏 */
.language-current {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    border: 1px solid rgba(15, 38, 92, 0.1);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 1px 3px rgba(15, 38, 92, 0.05);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    height: 36px;
    box-sizing: border-box;
}

.language-current:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 
        0 4px 12px rgba(15, 38, 92, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.language-current.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 语言标识 */
.language-flag {
    font-size: 1.1rem;
    line-height: 1;
}

.language-text {
    font-weight: 500;
    letter-spacing: -0.01em;
}

/* 下拉箭头 */
.language-arrow {
    width: 12px;
    height: 12px;
    color: var(--text-medium);
    transition: all 0.25s ease;
    opacity: 0.7;
}

.language-current:hover .language-arrow {
    opacity: 1;
    color: var(--primary-color);
}

.language-current.active .language-arrow {
    transform: rotate(180deg);
    color: var(--primary-color);
    opacity: 1;
}

/* 下拉菜单 - 与整体卡片风格一致 */
.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--bg-white);
    border: 1px solid rgba(15, 38, 92, 0.1);
    border-radius: var(--border-radius-md);
    box-shadow: 
        0 8px 32px rgba(15, 38, 92, 0.1),
        0 4px 16px rgba(15, 38, 92, 0.05),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 6px;
    gap: 6px;
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 语言选项 - 与特性卡片风格一致 */
.language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-dark);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    position: relative;
}

.language-option:hover {
    background: rgba(15, 38, 92, 0.05);
    transform: translateX(2px);
}

.language-option.active {
    background: rgba(15, 38, 92, 0.1);
    color: var(--primary-color);
    font-weight: 600;
}

.language-option.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 0 2px 2px 0;
}

/* 语言国旗图标 */
.language-option-flag {
    font-size: 1.2rem;
    line-height: 1;
}

.language-option-text {
    flex: 1;
    letter-spacing: -0.01em;
}

/* 选中标记 */
.language-option-check {
    width: 16px;
    height: 16px;
    color: var(--primary-color);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.language-option.active .language-option-check {
    opacity: 1;
}

/* ==============================================================================
   8. Hero区域
   ============================================================================== */
.hero-section {
    min-height: 80vh;
    padding-top: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: #000;
}

.hero-content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    padding-bottom: 120px;
    animation: fadeInUp 1.2s ease-out forwards;
    opacity: 0;
}

.hero-circle-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 2rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(15, 38, 92, 0.3);
    transform: translateY(20px);
    opacity: 0;
    animation: avatarAppear 0.8s ease-out 0.3s forwards;
    background: rgba(15, 38, 92, 0.1);
}

.hero-circle-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 2rem;
    max-width: 800px;
    letter-spacing: -0.01em;
    color: #FFFFFF;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5), 0 4px 20px rgba(15, 38, 92, 0.3);
    transform: translateY(30px);
    opacity: 0;
    animation: textAppear 0.8s ease-out 0.5s forwards;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    transform: translateY(40px);
    opacity: 0;
    animation: buttonAppear 0.8s ease-out 0.8s forwards;
}

.hero-image-placeholder {
    width: 100%;
    height: auto;
    background-color: #e0e0e2;
    min-height: 400px;
    object-fit: cover;
}

#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    opacity: 0.8;
    mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
}

.hero-text-wrapper {
    position: relative;
    z-index: 10;
    pointer-events: none;
}

.hero-text-wrapper * {
    pointer-events: auto;
    margin-left: auto;
    margin-right: auto;
}

/* ==============================================================================
   9. 网格系统
   ============================================================================== */
.grid-4, .grid-3, .grid-2, .grid-2-l-r { 
    display: grid; 
    gap: 2rem; 
}

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

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

.grid-2 { 
    grid-template-columns: repeat(2, 1fr); 
}

.grid-2-l-r { 
    grid-template-columns: 1.2fr 0.8fr; 
}

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

/* ==============================================================================
   10. 特性图标区域
   ============================================================================== */
.feature-item { 
    padding: 2rem; 
    transition: transform 0.3s ease; 
}

.icon-circle {
    width: 64px;
    height: 64px;
    background-color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.feature-item h3 { 
    font-size: 1.1rem; 
    margin-bottom: 0.75rem; 
    color: var(--text-dark); 
}

.feature-item p { 
    font-size: 0.95rem; 
    color: var(--text-medium); 
}

/* ==============================================================================
   11. 特色展示 (图文)
   ============================================================================== */
.feature-list { 
    margin-top: 2rem; 
    margin-bottom: 2rem; 
}

.feature-list li { 
    margin-bottom: 1rem; 
    padding-left: 1.5rem; 
    position: relative; 
    color: var(--text-medium); 
}

.feature-list li::before { 
    content: ''; 
    position: absolute; 
    left: 0; 
    top: 10px; 
    width: 6px; 
    height: 6px; 
    background-color: var(--primary-color); 
    border-radius: 50%; 
}

.rounded-shadow-image { 
    border-radius: var(--border-radius-lg); 
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15); 
}

/* ==============================================================================
   12. 客户Logo轮播图样式 (Swiper)
   ============================================================================== */
.logo-carousel-container {
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.client-logo-swiper {
    width: 100%;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.client-logo-swiper .swiper-wrapper {
    transition-timing-function: linear;
}

.client-logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    background-color: #fff;
    border-radius: 16px;
    padding: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    transition: all 0.3s ease;
}

.client-logo-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.client-logo-link img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.client-logo-link:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

/* ==============================================================================
   13. 卡片样式 (Why Us)
   ============================================================================== */
.apple-card {
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    background-color: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.5);
    transition: all 0.3s ease;
}

.bg-white.apple-card { 
    background-color: #fff; 
    box-shadow: 0 4px 20px rgba(0,0,0,0.04); 
    border: none; 
}

.apple-card:hover { 
    transform: translateY(-3px); 
    box-shadow: 0 8px 25px rgba(0,0,0,0.08); 
}

.apple-card h3 { 
    font-size: 1.5rem; 
    margin-bottom: 1rem; 
}

.apple-card p { 
    color: var(--text-medium); 
}

/* ==============================================================================
   14. 产品展示区域 (Product Showcase)
   ============================================================================== */
.product-showcase-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.product-showcase {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.main-screen {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.1), 0 10px 20px -10px rgba(15, 38, 92, 0.2);
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform 0.3s ease;
}

.product-showcase:hover .main-screen {
    transform: perspective(1000px) rotateY(0deg);
}

.screen-header {
    padding: 0.75rem 1rem;
    background: var(--bg-light);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.window-controls {
    display: flex;
    gap: 0.5rem;
}

.control-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.control-dot.red { background: #FF5F57; }
.control-dot.yellow { background: #FEBC2E; }
.control-dot.green { background: #28C840; }

.screen-title {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-medium);
    margin: 0 auto;
    text-align: center;
}

.screen-content {
    padding: 1.5rem;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.product-image {
    height: 150px;
    background: linear-gradient(135deg, rgba(15, 38, 92, 0.1) 0%, rgba(15, 38, 92, 0.05) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 4px;
    width: 80px;
    height: 80px;
}

.grid-cell {
    background: var(--primary-color);
    border-radius: 4px;
    opacity: 0.1;
}

.product-info {
    padding: 1.5rem;
}

.product-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.product-info p {
    font-size: 0.85rem;
    color: var(--text-medium);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.25rem 0.5rem;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-medium);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.visual-decorations {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    padding: 0.75rem 1rem;
    background: var(--bg-white);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: float 3s ease-in-out infinite;
    pointer-events: auto;
    cursor: pointer;
    transition: all 0.3s ease;
}

.floating-card:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-1 { top: 10%; right: -20px; animation-delay: 0s; }
.card-2 { top: 45%; left: -30px; animation-delay: 1s; }
.card-3 { bottom: 20%; right: -15px; animation-delay: 2s; }

.card-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.75rem;
}

.card-text {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dark);
    white-space: nowrap;
}

/* ==============================================================================
   15. 联系方式区域样式
   ============================================================================== */
.footer-contact-section { 
    background-color: var(--bg-light); 
    padding-bottom: 7rem; 
}

.wireframe-layout-grid { 
    display: grid; 
    grid-template-columns: 1.4fr 1fr; 
    gap: 3rem; 
    align-items: stretch; 
}

.form-card.apple-card.bg-white.p-5, 
.details-card.apple-card.bg-white.p-5 {
    border-radius: var(--border-radius-lg); 
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.08); 
    height: 100%; 
    background-color: var(--bg-white); 
    border: 1px solid rgba(0,0,0,0.03);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.apple-form-wireframe .form-group { 
    margin-bottom: 1.25rem; 
}

.form-row-2 { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 1.25rem; 
}

.apple-form-wireframe input, 
.apple-form-wireframe textarea {
    width: 100%;
    padding: 16px;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    background-color: #fff;
    transition: all 0.3s ease;
    color: var(--text-dark);
}

.apple-form-wireframe input::placeholder, 
.apple-form-wireframe textarea::placeholder { 
    color: #a1a1a6; 
}

.apple-form-wireframe input:focus, 
.apple-form-wireframe textarea:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}

.details-card h3 { 
    font-size: 1.5rem; 
}

.details-grid-2x2 { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 1.5rem; 
}

.detail-box {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: background-color 0.3s ease;
}

.detail-box:hover { 
    background-color: #e8e8ed; 
}

.detail-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
    background: white;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.detail-text h4 { 
    font-size: 0.9rem; 
    font-weight: 600; 
    margin-bottom: 0.5rem; 
    color: var(--text-dark); 
}

.detail-text p { 
    font-size: 0.85rem; 
    color: var(--text-medium); 
    line-height: 1.5; 
    margin: 0; 
}

.social-placeholder { 
    display: flex; 
    gap: 10px; 
    justify-content: flex-end; 
}

.dot { 
    width: 12px; 
    height: 12px; 
    background-color: #d2d2d7; 
    border-radius: 50%; 
}

.contact-services-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.service-badge {
    padding: 0.5rem 1rem;
    background-color: var(--bg-light);
    color: var(--text-medium);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.service-badge:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 38, 92, 0.15);
}

.contact-grid-2x2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background-color: var(--bg-light);
    border-radius: var(--border-radius-md);
    transition: none;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    background-color: var(--bg-white);
    color: var(--primary-color);
    transform: none;
}

.wechat-icon {
    color: #07C160;
}

.contact-item:hover .wechat-icon {
    background-color: var(--bg-white);
    color: #07C160;
}

.contact-text {
    flex: 1;
}

.contact-text h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.contact-text p {
    font-size: 0.9rem;
    color: var(--text-medium);
    line-height: 1.4;
    margin: 0;
}

.contact-text p br {
    display: block;
    margin: 0.25rem 0;
}

.response-time-info {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.response-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
    text-align: right;
}

.response-details {
    font-size: 0.75rem;
    color: var(--text-medium);
    line-height: 1.5;
    text-align: right;
}

.response-item {
    display: inline-block;
}

.response-separator {
    margin: 0 0.5rem;
    color: var(--text-light);
}

/* ==============================================================================
   16. 底部页脚
   ============================================================================== */
.final-footer {
    background-color: var(--bg-footer);
    color: #86868b;
    padding: 4rem 0;
    text-align: center;
    position: relative;
}

.footer-content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    position: relative;
}

.social-icons-area {
    display: flex;
    gap: 1.5rem;
}

.social-icon-area {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-icon-area:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.social-icon-area img {
    width: 18px;
    height: 18px;
    filter: brightness(0.8);
}

.text-area p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: #86868b;
    margin-bottom: 0.5rem;
}

.logo-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo-img {
    height: 30px;
    width: auto;
    opacity: 0.7;
}

.logo-area span {
    font-size: 0.9rem;
    color: #86868b;
}

.copyright {
    background-color: var(--bg-footer);
    color: #8a8a8e;
    font-size: 0.75rem;
    text-align: center;
    padding: 1.2rem 0;
    font-weight: 400;
    border-top: 1px solid #333;
}

/* ==============================================================================
   17. 动画定义
   ============================================================================== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(40px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes avatarAppear {
    0% { opacity: 0; transform: translateY(20px) scale(0.9); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes textAppear {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes buttonAppear {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 微信弹窗样式 */
.wechat-popup {
    position: relative;
    cursor: pointer;
}

.wechat-popup::after {
    content: attr(data-wechat);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-dark);
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.wechat-popup:hover::after {
    opacity: 1;
    visibility: visible;
    bottom: 130%;
}

/* ==============================================================================
   18. 响应式适配
   ============================================================================== */
@media (max-width: 992px) {
    .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2-l-r { grid-template-columns: 1fr; gap: 3rem; }
    .wireframe-layout-grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
    .navbar-content { 
        flex-direction: column; 
        gap: 1rem; 
    }
    
    .nav-links { 
        gap: 1rem; 
        flex-wrap: wrap; 
        justify-content: center; 
    }
    
    .language-switcher-container {
        margin-left: 0;
      
        order: 1;
    }
    
    .language-current {
        padding: 6px 10px;
        font-size: 0.8rem;
        height: 32px;
    }
    
    .language-dropdown {
        min-width: 140px;
        right: auto;
        left: 0;
        padding: 4px;
        gap: 3px;
    }
    
    .language-option {
        padding: 8px 12px;
        font-size: 0.8125rem;
    }
    
    .language-option-flag {
        font-size: 1.1rem;
    }
    
    .hero-section { 
        padding-top: 140px; 
        padding-bottom: 4rem; 
    }
    
    .grid-4, .grid-3, .grid-2 { 
        grid-template-columns: 1fr; 
    }
    
    .section { 
        padding: 80px 0; 
    }
    
    .image-content { 
        order: -1; 
        margin-bottom: 2rem; 
    }
    
    .form-row-2 { 
        grid-template-columns: 1fr; 
    }
    
    .form-card, .details-card { 
        padding: 1.5rem; 
    }
    
    .logo-carousel-container { 
        padding: 1rem; 
    }
    
    .product-showcase { 
        max-width: 400px; 
    }
    
    .product-image { 
        height: 120px; 
    }
    
    .image-grid { 
        width: 60px; 
        height: 60px; 
    }
    
    .floating-card { 
        display: none; 
    }
    
    .contact-grid-2x2 { 
        grid-template-columns: 1fr; 
        gap: 1rem; 
    }
    
    .contact-item { 
        padding: 1rem; 
    }
    
    .contact-services-grid { 
        justify-content: center; 
    }
    
    .hero-content { 
        padding-top: 60px; 
        padding-bottom: 80px; 
    }
    
    .hero-circle-placeholder { 
        width: 80px; 
        height: 80px; 
        margin-bottom: 1.5rem; 
    }
    
    .hero-title { 
        font-size: 2.2rem; 
        margin-bottom: 1.5rem; 
        padding: 0 1rem; 
    }
    
    .hero-buttons { 
        flex-direction: column; 
        gap: 1rem; 
        width: 100%; 
        max-width: 280px; 
    }
    
    .btn-light { 
        width: 100%; 
        padding: 12px 28px; 
        font-size: 0.95rem; 
    }
    
    .main-screen { 
        transform: none; 
    }
}

@media (max-width: 480px) {
    .contact-icon { 
        width: 40px; 
        height: 40px; 
    }
    
    .contact-text h4 { 
        font-size: 0.9rem; 
    }
    
    .contact-text p { 
        font-size: 0.85rem; 
    }
    
    .response-item { 
        display: block; 
        margin-bottom: 0.25rem; 
    }
    
    .response-separator { 
        display: none; 
    }
    
    .product-showcase-container { 
        padding: 1rem; 
    }
    
    .product-info h4 { 
        font-size: 1rem; 
    }
    
    .product-info p { 
        font-size: 0.8rem; 
    }
    
    .hero-title { 
        font-size: 1.8rem; 
        line-height: 1.2; 
    }
    
    .hero-circle-placeholder { 
        width: 70px; 
        height: 70px; 
        margin-bottom: 1.2rem; 
    }
    
    .btn-light { 
        padding: 10px 24px; 
        font-size: 0.9rem; 
    }
}

/* 性能优化：减少动画选项 */
@media (prefers-reduced-motion: reduce) {
    .hero-section, .hero-circle-placeholder, .hero-title, .hero-buttons, 
    .btn-light, .floating-card {
        animation: none !important;
        transition: none !important;
    }
    
    .hero-content, .hero-circle-placeholder, .hero-title, .hero-buttons {
        opacity: 1;
        transform: none;
    }
}

/* ==============================================================================
   导航栏 CSS 片段
   ============================================================================== */

/* 导航链接基础样式 */
.nav-links li span.nav-link {
    font-size: 0.9rem;
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 4px;
    cursor: pointer;
    display: inline-block;
    
    /* 移除移动端点击高亮 */
    -webkit-tap-highlight-color: transparent;
}

/* 鼠标悬停和激活状态用同样的样式 */
.nav-links li span.nav-link:hover,
.nav-links li span.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* 移动端：去掉hover效果 */
@media (max-width: 768px) {
    .nav-links li span.nav-link:hover {
        color: var(--text-dark);
        font-weight: 500;
    }
}

/* 桌面端保持hover效果 */
@media (min-width: 769px) {
    .nav-links li span.nav-link:hover {
        color: var(--primary-color);
        font-weight: 600;
    }
}

/* 如果要加下划线效果（可选） */
.nav-links li span.nav-link {
    position: relative;
}

.nav-links li span.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.nav-links li span.nav-link:hover::after,
.nav-links li span.nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* 移动端去掉下划线动画 */
@media (max-width: 768px) {
    .nav-links li span.nav-link:hover::after {
        transform: scaleX(0);
    }
}

.navbar {
  z-index: 1000;
  position: relative; /* 确保z-index生效 */
}

.language-dropdown {
  z-index: 1001; /* 比导航栏高 */
}

/* ==============================================================================
   20. 骨架屏样式 (Skeleton Loading)
   ============================================================================== */

.skeleton {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-white);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.skeleton-nav {
  width: 100%;
  padding: 1rem 0;
  background: var(--bg-white);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
}

.skeleton-logo {
  width: 150px;
  height: 32px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.skeleton-menu-item {
  width: 60px;
  height: 20px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  border-radius: 10px;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
}

.skeleton-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  margin-bottom: 2rem;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-title {
  width: 80%;
  height: 40px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  margin-bottom: 1rem;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-button {
  width: 200px;
  height: 50px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  border-radius: 25px;
  margin-top: 1rem;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-content {
  padding: 4rem 5%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.skeleton-card {
  height: 200px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  border-radius: var(--border-radius-md);
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

/* 骨架屏动画 */
@keyframes skeleton-loading {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* 骨架屏隐藏动画 */
@keyframes skeleton-fade-out {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}

.skeleton.hide {
  animation: skeleton-fade-out 0.3s ease-out forwards;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .skeleton-menu {
    display: none;
  }
  
  .skeleton-circle {
    width: 80px;
    height: 80px;
  }
  
  .skeleton-title {
    height: 30px;
  }
  
  .skeleton-button {
    width: 180px;
    height: 45px;
  }
  
  .skeleton-content {
    grid-template-columns: 1fr;
  }
}