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

body {
    font-family: 'Noto Sans JP', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
    overflow-x: hidden;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* CSS 变量系统 */
:root {
    /* 颜色变量 */
    --primary-color: #2c5aa0;
    --primary-light: #4a7bc8;
    --primary-dark: #1a4078;
    --secondary-color: #64b1c3;
    --text-dark: #373554;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --bg-white: #fff;
    --border-color: #e0e0e0;
    --japanese-red: #c73e1d;
    --japanese-indigo: #2c5aa0;
    --japanese-cream: #f6f2ea;
    --japanese-brown: #8c7851;
    
    /* 响应式断点变量（用于参考，媒体查询中使用 px 值）*/
    /* --breakpoint-sm: 640px;   手机横屏 */
    /* --breakpoint-md: 768px;   平板竖屏 */
    /* --breakpoint-lg: 1024px;  平板横屏/小桌面 */
    /* --breakpoint-xl: 1280px;  桌面 */
    /* --breakpoint-2xl: 1536px; 大桌面 */
    
    /* 间距变量 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    
    /* 容器宽度 */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1700px;
    
    /* ============================================
       流体排版变量 (Fluid Typography Variables)
       使用 clamp() 实现响应式字体缩放
       最小视口: 320px | 最大视口: 1920px
       ============================================ */
    
    /* 标题字体大小 */
    --font-h1: clamp(1.75rem, 1.5rem + 2vw, 3.5rem);
    --font-h2: clamp(1.5rem, 1.25rem + 1.5vw, 2.5rem);
    --font-h3: clamp(1.25rem, 1rem + 1vw, 1.75rem);
    --font-h4: clamp(1.125rem, 0.9375rem + 0.75vw, 1.5rem);
    --font-h5: clamp(1rem, 0.875rem + 0.5vw, 1.25rem);
    --font-h6: clamp(0.875rem, 0.75rem + 0.5vw, 1.125rem);
    
    /* 正文字体大小 */
    --font-body: clamp(1rem, 0.875rem + 0.5vw, 1.125rem);
    --font-lead: clamp(1.125rem, 1rem + 0.75vw, 1.375rem);
    --font-small: clamp(0.8125rem, 0.75rem + 0.25vw, 0.9375rem);
    --font-xs: clamp(0.75rem, 0.6875rem + 0.25vw, 0.8125rem);
    
    /* 行高 */
    --leading-tight: 1.1;
    --leading-snug: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 1.75;
    
    /* 字重 */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* 字间距 */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    
    /* 过渡时间 */
    --transition-fast: 150ms;
    --transition-normal: 200ms;
    --transition-slow: 300ms;
}

/* 两列布局样式 */
.header-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(20px, 4vw, 40px);
    align-items: center;
    margin-bottom: clamp(24px, 5vw, 40px);
}

@media (min-width: 768px) {
    .header-row {
        grid-template-columns: 1fr auto;
    }
}

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

@media (min-width: 768px) {
    .header-text {
        text-align: left;
    }
}

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

@media (min-width: 768px) {
    .header-badges {
        text-align: right;
    }
}

.header-badges .product-badges {
    justify-content: center;
}

@media (min-width: 768px) {
    .header-badges .product-badges {
        justify-content: flex-end;
    }
}

/* ============================================
   流体排版系统 (Fluid Typography System)
   使用 clamp() 实现响应式字体缩放
   最小视口: 320px | 最大视口: 1920px
   ============================================ */

/* 字体层级结构 - 流体排版 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 1rem 0;
    color: var(--text-dark);
    text-wrap: balance;
    overflow-wrap: break-word;
}

/* H1 - 主标题: 28px → 56px (320px → 1920px) */
h1 {
    font-size: var(--font-h1);
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
}

/* H2 - 次标题: 24px → 40px */
h2 {
    font-size: var(--font-h2);
    letter-spacing: var(--tracking-tight);
    line-height: 1.15;
}

/* H3 - 三级标题: 20px → 28px */
h3 {
    font-size: var(--font-h3);
    letter-spacing: -0.01em;
    line-height: var(--leading-snug);
}

/* H4 - 四级标题: 18px → 24px */
h4 {
    font-size: var(--font-h4);
    letter-spacing: var(--tracking-normal);
    line-height: 1.3;
}

/* H5 - 五级标题: 16px → 20px */
h5 {
    font-size: var(--font-h5);
    letter-spacing: var(--tracking-normal);
    line-height: 1.35;
}

/* H6 - 六级标题: 14px → 18px */
h6 {
    font-size: var(--font-h6);
    letter-spacing: var(--tracking-normal);
    line-height: 1.4;
}

/* 正文文本 - 最小 16px 确保可访问性 */
p {
    margin: 0 0 1rem 0;
    line-height: var(--leading-loose);
    color: var(--text-light);
    font-size: var(--font-body);
    text-wrap: pretty;
}

/* 小号文本 */
small, .text-small {
    font-size: var(--font-small);
    line-height: var(--leading-normal);
}

/* 超小号文本 - 标签、时间戳等 */
.text-xs {
    font-size: var(--font-xs);
    line-height: 1.4;
}

/* 大号正文 */
.lead, .text-lead {
    font-size: var(--font-lead);
    line-height: var(--leading-relaxed);
    color: var(--text-light);
}

/* 引用文本 */
blockquote {
    font-size: var(--font-lead);
    line-height: var(--leading-relaxed);
    font-style: italic;
    padding-left: 1.5rem;
    border-left: 4px solid var(--primary-color);
    margin: 1.5rem 0;
    color: var(--text-dark);
}

/* 链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal) ease;
}

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

a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ============================================
   辅助排版类 (Typography Utility Classes)
   ============================================ */

/* 字体大小工具类 */
.font-h1 { font-size: var(--font-h1); }
.font-h2 { font-size: var(--font-h2); }
.font-h3 { font-size: var(--font-h3); }
.font-h4 { font-size: var(--font-h4); }
.font-h5 { font-size: var(--font-h5); }
.font-h6 { font-size: var(--font-h6); }
.font-body { font-size: var(--font-body); }
.font-lead { font-size: var(--font-lead); }
.font-small { font-size: var(--font-small); }
.font-xs { font-size: var(--font-xs); }

/* 字重工具类 */
.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* 行高工具类 */
.leading-tight { line-height: var(--leading-tight); }
.leading-snug { line-height: var(--leading-snug); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }
.leading-loose { line-height: var(--leading-loose); }

/* 字间距工具类 */
.tracking-tighter { letter-spacing: var(--tracking-tighter); }
.tracking-tight { letter-spacing: var(--tracking-tight); }
.tracking-normal { letter-spacing: var(--tracking-normal); }
.tracking-wide { letter-spacing: var(--tracking-wide); }
.tracking-wider { letter-spacing: var(--tracking-wider); }

/* 文本对齐 */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* 文本换行 */
.text-wrap { text-wrap: wrap; }
.text-nowrap { white-space: nowrap; }
.text-balance { text-wrap: balance; }
.text-pretty { text-wrap: pretty; }

/* 文本颜色 */
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-dark { color: var(--text-dark); }
.text-light { color: var(--text-light); }
.text-muted { color: #888; }

/* 容器样式 */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

/* 通用间距类 */
.section-padding {
    padding: 120px 0;
}

.mb-1 {
    margin-bottom: 8px;
}

.mb-2 {
    margin-bottom: 16px;
}

.mb-3 {
    margin-bottom: 24px;
}

.mb-4 {
    margin-bottom: 32px;
}

.mb-5 {
    margin-bottom: 48px;
}

.mt-1 {
    margin-top: 8px;
}

.mt-2 {
    margin-top: 16px;
}

.mt-3 {
    margin-top: 24px;
}

.mt-4 {
    margin-top: 32px;
}

.mt-5 {
    margin-top: 48px;
}

/* 导航栏样式 */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 0px 10px rgba(0, 0, 0, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

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

.logo a {
    display: inline-block;
}

.logo-image {
    height: 45px;
    width: auto;
    display: block;
}

.logo-image:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .logo-image {
        height: 35px;
    }
}

@media (max-width: 480px) {
    .logo-image {
        height: 40px;
        width: -webkit-fill-available;
        margin-bottom: 20px;
    }
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    letter-spacing: 0.5px;
}

.nav-links a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu {
    display: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    margin-top: 78px;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: clamp(40px, 8vw, 80px) 0;
    background-color: #000;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('image/cda_banner.webp') center/cover no-repeat;
    opacity: 0.3;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    flex-wrap: wrap;
    width: 100%;
    max-width: var(--container-2xl);
    padding: 0 clamp(16px, 4vw, 48px);
}

.hero-content {
    width: 100%;
    max-width: 900px;
    min-width: 0;
    margin-bottom: clamp(24px, 5vw, 40px);
    text-align: center;
}

.hero-content h1 {
    font-size: clamp(1.75rem, 5vw + 0.5rem, 3.5rem);
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: clamp(24px, 5vw, 60px);
    line-height: 1.15;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    text-wrap: balance;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    max-width: 100%;
}

.hero-content h4 {
    font-size: clamp(1rem, 2vw + 0.25rem, 1.5rem);
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: clamp(12px, 2vw, 20px);
    line-height: 1.3;
    letter-spacing: -0.01em;
    text-wrap: balance;
}

.hero-content p {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1.25rem);
    color: var(--bg-light);
    margin-bottom: clamp(20px, 4vw, 32px);
    line-height: 1.7;
    max-width: 100%;
    text-wrap: pretty;
}

.hero-buttons {
    display: flex;
    gap: clamp(12px, 2vw, 16px);
    flex-wrap: wrap;
    justify-content: center;
}


.nanomist-animation {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: 10px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.4));
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid rgba(100, 177, 195, 0.2);
}

.particle {
    position: absolute;
    bottom: 0;
    width: 6px;
    height: 6px;
    background: rgba(100, 177, 195, 0.6);
    border-radius: 50%;
}



.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: #fff;
    padding: clamp(12px, 2vw, 14px) clamp(20px, 4vw, 32px);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(44, 90, 160, 0.2);
    transition: all var(--transition-normal) ease;
    white-space: nowrap;
    min-height: 44px;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.3);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--primary-color);
    padding: clamp(12px, 2vw, 14px) clamp(20px, 4vw, 32px);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    border: 2px solid var(--primary-color);
    transition: all var(--transition-normal) ease;
    white-space: nowrap;
    min-height: 44px;
}

.btn-secondary:hover {
    background: rgba(44, 90, 160, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.2);
}

/* 服务导航区样式 */
.service-nav {
    padding: 20px 0;
    background: var(--bg-white);
    margin-top: -78px;
}

.service-grid {
    position: relative;
    z-index: 100;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0px 60px;
}

.service-item {
    padding: 20px 0;
    border-radius: 4px;
    display: flex;
    align-items: center;
}

.service-content {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.service-item i {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.service-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.service-text span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
}

.service-text p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

/* 产品展示区域样式 */
.product-showcase-section {
    padding: clamp(60px, 10vw, 100px) 0;
    background: var(--bg-light);
}

.product-showcase-section .product-main {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
}

.product-showcase-container {
    display: flex;
    flex-direction: column;
    gap: clamp(32px, 6vw, 64px);
}

@media (min-width: 1024px) {
    .product-showcase-container {
        flex-direction: row;
    }
}

.product-visual {
    flex: 1;
    min-width: 0;
}

@media (min-width: 1024px) {
    .product-visual {
        min-width: 300px;
    }
}

.product-main-image {
    background-color: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: clamp(16px, 3vw, 24px);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: clamp(200px, 30vw, 400px);
}

.product-main-image img {
    max-width: 100%;
    max-height: 100%;
    display: block;
    object-fit: contain;
}

.product-badges {
    display: flex;
    gap: clamp(12px, 2vw, 16px);
    flex-wrap: wrap;
    padding-bottom: clamp(20px, 4vw, 40px);
    justify-content: center;
}

@media (min-width: 768px) {
    .product-badges {
        justify-content: flex-start;
    }
}

.badge-item {
    display: inline-flex;
    align-items: center;
    gap: clamp(6px, 1vw, 8px);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: clamp(8px, 1.5vw, 12px) clamp(12px, 2vw, 20px);
    transition: all var(--transition-normal) ease;
}

.badge-item img {
    width: clamp(40px, 6vw, 60px);
    height: auto;
}

.badge-item span {
    font-size: clamp(0.75rem, 1.25vw, 0.875rem);
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.product-details {
    flex: 1;
    min-width: 0;
}

@media (min-width: 1024px) {
    .product-details {
        min-width: 300px;
    }
}

.product-details h2 {
    font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: clamp(8px, 1.5vw, 16px);
    letter-spacing: -0.02em;
    text-wrap: balance;
}

.product-tagline {
    font-size: clamp(0.8125rem, 1.25vw, 1rem);
    color: var(--text-light);
    margin-bottom: clamp(16px, 3vw, 24px);
    font-weight: 400;
    line-height: 1.5;
}

.product-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.highlight-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.highlight-icon i {
    color: #fff;
    font-size: 1.25rem;
}

.highlight-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.highlight-content p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

.product-specs {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    background: var(--bg-white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-label {
    font-size: 0.9375rem;
    color: var(--text-light);
    font-weight: 500;
}

.spec-value {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* 通用分隔线样式 */
.section-divider {
    width: 80px;
    height: 3px;
    background: var(--japanese-red);
    margin: 0 auto 40px;
}

/* ============================================
   技术原理样式 (Technology Section)
   ============================================ */

.technology {
    padding: clamp(40px, 8vw, 0px) 0;
    background: var(--bg-white);
}

.technology h2 {
    font-size: var(--font-h2);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: clamp(16px, 3vw, 24px);
    position: relative;
    letter-spacing: var(--tracking-tight);
}

.tech-principles {
    margin-top: clamp(24px, 5vw, 40px);
}

/* 左右布局容器 */
.tab-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(20px, 4vw, 40px);
    margin-top: clamp(24px, 5vw, 40px);
}

@media (min-width: 768px) {
    .tab-layout {
        grid-template-columns: clamp(220px, 25vw, 300px) 1fr;
    }
}

/* Tab标签导航样式 */
.tab-navigation {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 1.5vw, 12px);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: clamp(8px, 1.5vw, 12px);
    padding: clamp(12px, 2vw, 16px) clamp(16px, 3vw, 24px);
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: clamp(8px, 1.5vw, 12px);
    cursor: pointer;
    transition: all var(--transition-slow) ease;
    font-family: inherit;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.tab-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(44, 90, 160, 0.05);
    transform: translateX(4px);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.3);
}

.tab-number {
    font-size: var(--font-small);
    font-weight: var(--font-bold);
    opacity: 0.7;
    min-width: clamp(24px, 3vw, 30px);
}

.tab-btn.active .tab-number {
    opacity: 1;
}

.tab-title {
    font-size: clamp(0.8125rem, 1.25vw, 0.9375rem);
    font-weight: var(--font-medium);
    flex: 1;
    line-height: 1.4;
}

/* Tab内容区域样式 */
.tab-content-container {
    position: relative;
    min-height: clamp(200px, 40vw, 500px);
}

.tab-content {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.tab-content.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

.tab-content-inner {
    align-items: center;
    background: var(--bg-white);
    border-radius: clamp(12px, 2vw, 20px);
    padding: clamp(12px, 2vw, 20px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.tab-image {
    width: 100%;
    overflow: hidden;
    border-radius: clamp(8px, 1.5vw, 12px);
}

.tab-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

/* 原理卡片样式 */
.principle-card {
    position: relative;
    overflow: hidden;
}

.principle-image {
    width: 100%;
    overflow: hidden;
}

.principle-image img,
.tech-image {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

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

.principle-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-bold);
    color: rgba(44, 90, 160, 0.1);
    position: absolute;
    top: clamp(12px, 2vw, 20px);
    right: clamp(16px, 3vw, 30px);
    z-index: 8;
}

.principle-content {
    position: relative;
    z-index: 1;
    padding: clamp(12px, 2vw, 20px);
}

.principle-content h3 {
    font-size: var(--font-h4);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    margin-bottom: clamp(12px, 2vw, 16px);
    line-height: 1.3;
    border-left: 3px solid var(--japanese-red);
    padding-left: clamp(12px, 2vw, 16px);
}

.principle-content p {
    color: var(--text-light);
    font-size: var(--font-body);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ============================================
   核心优势样式 (Features Section)
   ============================================ */

.features {
    padding: clamp(40px, 8vw, 80px) 0;
    background: var(--bg-white);
}

.features h2 {
    font-size: var(--font-h2);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: clamp(16px, 3vw, 24px);
    position: relative;
    letter-spacing: var(--tracking-tight);
}

.features-content {
    display: flex;
    flex-direction: column;
    gap: clamp(40px, 8vw, 64px);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(200px, 30vw, 220px), 1fr));
    gap: clamp(16px, 3vw, 24px);
}

.feature-card {
    background: var(--bg-light);
    border-radius: 4px;
    padding: clamp(20px, 4vw, 32px);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(12px, 2vw, 16px);
    transition: all var(--transition-normal) ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(44, 90, 160, 0.1);
    border-color: var(--primary-color);
    background: var(--bg-white);
}

.feature-icon {
    width: clamp(48px, 8vw, 60px);
    height: clamp(48px, 8vw, 60px);
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto clamp(10px, 2vw, 15px);
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    color: #fff;
}

.feature-card h3 {
    font-size: var(--font-h4);
    font-weight: var(--font-semibold);
    color: var(--text-dark);
    margin: 0;
    line-height: 1.3;
}

.feature-card p {
    color: var(--text-light);
    line-height: var(--leading-relaxed);
    font-size: var(--font-small);
    margin: 0;
}

.removal-targets {
    margin-top: clamp(40px, 6vw, 60px);
}

.removal-targets h3 {
    font-size: var(--font-h3);
    font-weight: var(--font-semibold);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: clamp(20px, 4vw, 30px);
}

.targets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(120px, 20vw, 150px), 1fr));
    gap: clamp(12px, 2vw, 20px);
}

.target-item {
    background: var(--bg-light);
    border-radius: 4px;
    padding: clamp(12px, 2vw, 20px);
    text-align: center;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.target-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(44, 90, 160, 0.1);
    border-color: var(--primary-color);
}

.target-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.target-item span {
    color: var(--text-dark);
    font-size: 0.9rem;
}

/* 第三方验证样式 */
.validation {
    padding: 80px 0;
    background: var(--bg-white);
}

.validation h2 {
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 24px;
    margin-bottom: 10px;
    text-align: center;
    position: relative;
    letter-spacing: -0.5px;
}

.validation h3 {
     font-weight: 700;
    color: var(--primary-color);
    margin-top: 24px;
    margin-bottom: 10px;
    position: relative;
    letter-spacing: -0.5px;
}

.validation-chart-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    padding: 32px;

}

.chart-wrapper {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}
.chart-wrapper .validation-text{
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
    line-height: 1.6;
}


.bacteria-residual-chart,
.virus-removal-chart{
    width: 100%;
    height: auto;
}

/* chart-wrapper-1 样式 */
.chart-wrapper {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e8e8e8;
}


/* 图表容器响应式 */
@media (max-width: 768px) {
    .chart-wrapper {
        padding: 16px;
    }
    
    .chart-wrapper .virus-removal-chart {
        min-height: 350px;
    }
}

@media (max-width: 480px) {
    .chart-wrapper {
        padding: 12px;
    }
    
    .chart-wrapper .virus-removal-chart {
        min-height: 300px;
    }
}

.validation-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 64px;
}

.validation-card {
    background: var(--bg-white);
    border-radius: 4px;
    padding: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.validation-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(44, 90, 160, 0.1);
    border-color: var(--primary-color);
}

.validation-logo {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: #fff;
}

.validation-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.validation-card p {
    color: var(--primary-color);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.validation-card .small-text {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: normal;
    line-height: 1.5;
    margin: 0;
}

/* 联系我们样式 */
.contact {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    background-image: url('image/keyvisual.jpg');
    background-size: cover;
    background-position: center;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #000000;
    opacity: 0.5;
    pointer-events: none;
    z-index: 1;
}

.contact h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 24px;
    position: relative;
    letter-spacing: -0.5px;
}

.contact h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: 24px;
    position: relative;
    letter-spacing: -0.5px;
}

.contact-content {
    display: flex;
    gap: 64px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.company-info {
    flex: 1;
    min-width: 300px;
}

.company-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--bg-white);
    margin-bottom: 20px;
    border-left: 3px solid var(--japanese-red);
    padding-left: 16px;
}

.company-info p {
    font-size: 1rem;
    color: var(--bg-white);
    line-height: 1.7;
    margin-bottom: 20px;
}

.contact-card {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 30px;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 20px;
    border-left: 3px solid var(--japanese-red);
    padding-left: 16px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
    color: var(--text-light);
}

.info-item i {
    color: var(--primary-color);
    margin-right: 15px;
    font-size: 1.2rem;
    margin-top: 2px;
}

/* 页脚样式 */
.footer {
    background: #fff;
    padding: 40px 0 20px;
    color: #fff;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 32px;
    align-items: flex-start;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

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

.footer-links {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    align-items: center;
}

.footer-links a {
    color: #000;
    text-decoration: none;
    font-size: 0.9rem;
}


.footer-bottom {
    text-align: left;
    padding-top: 20px;
    border-top: 1px solid #ccc;
    color: #ccc;
    font-size: 0.8rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .product-showcase-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .product-visual {
        min-width: 100%;
    }
    
    .product-details {
        min-width: 100%;
    }
    
    .features-content {
        gap: 10px;
    }
    
    .contact-content {
        gap: 10px;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        padding: 12px 20px;
    }
    
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        align-items: center;
        padding: 24px 0;
        gap: 16px;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .mobile-menu {
        display: block;
    }

    .product-highlights {
        grid-template-columns: 1fr;
    }

    .validation {
        padding: 30px 0;
    }
    
    .validation-chart-container {
        padding: 20px;
    }
    
    .validation-cards {
        gap: 24px;
    }

    .contact {
        padding: 60px 0;
    }
    
    .contact h2 {
        font-size: 2rem;
        margin-bottom: 20px;
    }
    
    .contact-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .contact-info {
        min-width: 100%;
    }
    
    .company-info {
        min-width: 100%;
    }

    .footer {
        padding: 30px 0 15px;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 24px;
        margin-bottom: 20px;
    }

    .footer-links {
        justify-content: center;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .badge-item {
        padding: 10px 16px;
    }
    
    .badge-item span {
        font-size: 0.8125rem;
    }
    
    .highlight-item {
        gap: 12px;
    }
    
    .highlight-icon {
        width: 40px;
        height: 40px;
    }
    
    .highlight-icon i {
        font-size: 1.125rem;
    }
    
    .highlight-content h3 {
        font-size: 1rem;
    }
    
    .highlight-content p {
        font-size: 0.8125rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .validation-chart-container {
        padding: 0px;
    }
    
    .validation-cards {
        grid-template-columns: 1fr;
    }
    
    .contact-card {
        padding: 24px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 12px;
    }
    
    .service-nav {
        margin-top: 0px;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 0px 10px;
    }
    
    .service-item {
        padding: 15px;
    }
}

/* ============================================
   技术规格书样式 (Technical Specs Section)
   ============================================ */

.technical-specs-section {
    padding: clamp(60px, 10vw, 100px) 0;
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--japanese-cream) 50%, var(--bg-white) 100%);
}

.specs-header {
    text-align: center;
    margin-bottom: clamp(40px, 8vw, 64px);
}

.specs-header h2 {
    font-size: var(--font-h2);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    margin-bottom: clamp(8px, 1.5vw, 16px);
    letter-spacing: var(--tracking-tight);
}

.specs-subtitle {
    font-size: var(--font-lead);
    color: var(--text-light);
    font-weight: var(--font-normal);
    margin-bottom: clamp(16px, 3vw, 24px);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* 概览卡片 */
.specs-overview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.overview-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.overview-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(44, 90, 160, 0.12);
    border-color: var(--primary-color);
}

.overview-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.overview-icon i {
    font-size: 1.75rem;
    color: #fff;
}

.overview-content h3 {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.overview-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
    line-height: 1.2;
}

.overview-unit {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

/* 规格网格 */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.specs-category {
    padding: 0px;
}

.specs-category.full-width {
    grid-column: 1 / -1;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-icon i {
    font-size: 1.25rem;
    color: #fff;
}

.category-header h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
    flex: 1;
}

.category-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(44, 90, 160, 0.1);
    padding: 6px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 规格表格 */
.specs-table {
    display: flex;
    flex-direction: column;
    gap: 2px;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.specs-table .spec-row {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: clamp(12px, 2vw, 16px);
    align-items: center;
    padding: clamp(10px, 2vw, 14px) 0;
    border-bottom: 1px solid var(--border-color);
}

.specs-table .spec-row:last-child {
    border-bottom: none;
}

.specs-table.comprehensive .spec-row {
    display: grid;
    grid-template-columns: 1fr;
    padding: clamp(12px, 2vw, 16px) clamp(8px, 2vw, 20px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
    gap: clamp(8px, 1.5vw, 16px);
}

@media (min-width: 640px) {
    .specs-table.comprehensive .spec-row {
        grid-template-columns: minmax(180px, 2fr) minmax(100px, 3fr);
    }
}

.specs-table.comprehensive .spec-row:hover {
    background-color: rgba(44, 90, 160, 0.03);
}

.specs-table.comprehensive .spec-row.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: clamp(8px, 1.5vw, 12px);
    margin-bottom: 8px;
    border-bottom: none;
}

.specs-table.comprehensive .spec-row.header .spec-name,
.specs-table.comprehensive .spec-row.header .spec-data {
    color: #fff;
    font-weight: 600;
    font-size: clamp(0.8125rem, 1.25vw, 0.9375rem);
}

.specs-table.comprehensive .spec-row.divider {
    border-top: 2px solid var(--primary-color);
    margin-top: 8px;
    padding-top: clamp(12px, 2vw, 20px);
}

.specs-table.comprehensive .spec-name {
    font-size: clamp(0.8125rem, 1.25vw, 0.9375rem);
    color: var(--text-dark);
    font-weight: 500;
    word-break: break-word;
}

.specs-table.comprehensive .spec-data {
    font-size: clamp(0.875rem, 1.25vw, 1rem);
    color: var(--primary-color);
    font-weight: 600;
    text-align: left;
    word-break: break-word;
}

.specs-category.compact .category-header {
    margin-bottom: clamp(12px, 2vw, 16px);
    padding-bottom: clamp(8px, 1.5vw, 12px);
}

.specs-category.compact .category-header h3 {
    font-size: clamp(1rem, 1.75vw, 1.375rem);
}

.specs-category.compact .specs-table.comprehensive .spec-row {
    padding: clamp(8px, 1.5vw, 10px) clamp(8px, 1.5vw, 16px);
    gap: clamp(8px, 1.5vw, 16px);
}

.specs-category.compact .specs-table.comprehensive .spec-name {
    font-size: clamp(0.75rem, 1.125vw, 0.875rem);
}

.specs-category.compact .specs-table.comprehensive .spec-data {
    font-size: clamp(0.8125rem, 1.25vw, 0.9375rem);
}

.spec-name {
    font-size: clamp(0.8125rem, 1.25vw, 0.9375rem);
    color: var(--text-light);
    font-weight: 500;
}

.spec-data {
    font-size: clamp(0.875rem, 1.25vw, 1rem);
    color: var(--text-dark);
    font-weight: 600;
    text-align: right;
}

.spec-data.highlight {
    color: var(--primary-color);
    font-size: 1.125rem;
}

.spec-alt {
    font-size: 0.8125rem;
    color: var(--text-light);
    text-align: right;
    min-width: 120px;
}

/* 电气规格子分类 */
.electrical-subcategories {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.electrical-region {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 20px;
}

.region-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.region-flag {
    font-size: 1.5rem;
}

.region-header h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.electrical-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0 -8px;
}

/* 环境规格备注 */
.environmental-notes {
    margin-top: 20px;
    padding: 16px;
    background: rgba(199, 62, 29, 0.08);
    border-radius: 12px;
    border-left: 4px solid var(--japanese-red);
}

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

.note-item i {
    color: var(--japanese-red);
    font-size: 1rem;
}

.note-item span {
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* 性能指标卡片 */
.performance-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.metric-card {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.metric-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(44, 90, 160, 0.1);
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    line-height: 1.2;
}

.metric-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.metric-desc {
    font-size: 0.8125rem;
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
}

/* 功能特性网格 */
.features-grid-specs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-spec-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 28px 20px;
    background: var(--bg-light);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-spec-item:hover {
    background: var(--bg-white);
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(44, 90, 160, 0.1);
}

.feature-spec-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-spec-icon i {
    font-size: 1.5rem;
    color: #fff;
}

.feature-spec-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.feature-spec-content p {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

/* 规格书页脚 */
.specs-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 32px;
    background: var(--bg-white);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-top: 48px;
}

.purchase-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.purchase-info p {
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.purchase-info a {
    color: var(--primary-color);
    font-weight: 600;
}

.purchase-info a:hover {
    text-decoration: underline;
}

.document-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: right;
}

.doc-version,
.doc-model {
    font-size: 0.8125rem;
    color: var(--text-light);
    font-weight: 500;
}

/* 技术规格书响应式设计 */
@media (max-width: 1200px) {
    .specs-overview {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .performance-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid-specs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .technical-specs-section {
        padding: 60px 0;
    }
    
    .specs-header h2 {
        font-size: 2rem;
    }
    
    .specs-overview {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .specs-category {
        padding: 0;
    }
    
    .specs-table .spec-row {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 16px 0;
    }
    
    .spec-data,
    .spec-alt {
        text-align: left;
    }
    
    .performance-metrics {
        grid-template-columns: 1fr;
    }
    
    .metric-card {
        padding: 24px;
    }
    
    .metric-value {
        font-size: 2rem;
    }
    
    .features-grid-specs {
        grid-template-columns: 1fr;
    }
    
    .specs-footer {
        flex-direction: column;
        gap: 24px;
    }
    
    .document-info {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .overview-card {
        padding: 24px 16px;
    }
    
    .overview-value {
        font-size: 1.5rem;
    }
    
    .category-header {
        flex-wrap: wrap;
    }
    
    .electrical-subcategories {
        gap: 16px;
    }
}

/* ============================================
   响应式优化系统 (Mobile-First)
   断点: 640px | 768px | 1024px | 1280px | 1536px
   测试尺寸: 375px | 414px | 768px | 1024px | 1440px
   ============================================ */

/* 响应式容器 */
.container {
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-2xl);
    }
}

/* 响应式网格工具类 */
.grid-responsive {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-responsive {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

@media (min-width: 1280px) {
    .grid-responsive {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 响应式 Flex 工具类 */
.flex-responsive {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .flex-responsive {
        flex-direction: row;
    }
}

/* 响应式间距工具类 */
.section-padding-responsive {
    padding: var(--spacing-3xl) 0;
}

@media (min-width: 768px) {
    .section-padding-responsive {
        padding: var(--spacing-4xl) 0;
    }
}

@media (min-width: 1024px) {
    .section-padding-responsive {
        padding: 100px 0;
    }
}

/* 响应式字体大小 */
.text-responsive-h1 {
    font-size: var(--text-3xl);
}

.text-responsive-h2 {
    font-size: var(--text-2xl);
}

.text-responsive-body {
    font-size: var(--text-base);
}

@media (min-width: 768px) {
    .text-responsive-h1 {
        font-size: var(--text-4xl);
    }
    
    .text-responsive-h2 {
        font-size: var(--text-3xl);
    }
    
    .text-responsive-body {
        font-size: var(--text-lg);
    }
}

@media (min-width: 1024px) {
    .text-responsive-h1 {
        font-size: var(--text-5xl);
    }
    
    .text-responsive-h2 {
        font-size: var(--text-4xl);
    }
}

/* 响应式表格处理 */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-responsive table {
    min-width: 600px;
}

/* 响应式图片 */
.img-responsive {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 响应式隐藏/显示工具类 */
.hide-mobile {
    display: none;
}

.show-mobile {
    display: block;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: block;
    }
    
    .show-mobile {
        display: none;
    }
}

/* 响应式文字对齐 */
.text-center-mobile {
    text-align: center;
}

@media (min-width: 768px) {
    .text-center-mobile {
        text-align: left;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn-primary,
    .btn-secondary,
    .tab-btn,
    .service-item,
    .feature-card,
    .validation-card {
        min-height: 44px;
        min-width: 44px;
    }
    
    a, button {
        touch-action: manipulation;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .mobile-menu,
    .hero-buttons,
    .footer-links {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
        color: #000;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ============================================
   Hero 区域额外响应式优化
   ============================================ */

/* 极小屏幕优化 (320px - 375px) */
@media (max-width: 375px) {
    .hero {
        min-height: 60vh;
        padding: clamp(30px, 6vw, 40px) 0;
    }
    
    .hero-content h1 {
        font-size: 1.5rem;
        line-height: 1.2;
    }
    
    .hero-content h4 {
        font-size: 0.9375rem;
    }
    
    .hero-content p {
        font-size: 0.875rem;
        line-height: 1.6;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
        max-width: 280px;
    }
}

/* 大屏幕优化 (1440px - 1920px) */
@media (min-width: 1440px) {
    .hero {
        min-height: 80vh;
    }
    
    .hero-content {
        max-width: 1000px;
    }
    
    .hero-content h1 {
        font-size: clamp(3rem, 4vw, 4rem);
    }
    
    .hero-content h4 {
        font-size: clamp(1.25rem, 1.5vw, 1.75rem);
    }
    
    .hero-content p {
        font-size: clamp(1.125rem, 1.25vw, 1.375rem);
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: 100vh;
        padding: 40px 0;
    }
    
    .hero-content {
        margin-bottom: 20px;
    }
    
    .hero-content h1 {
        margin-bottom: 20px;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .hero-content h1,
    .hero-content h4 {
        color: #fff;
        text-shadow: 0 0 4px rgba(0, 0, 0, 0.8);
    }
    
    .hero-content p {
        color: #fff;
    }
}

/* ============================================
   产品展示区域额外响应式优化
   ============================================ */

/* 极小屏幕优化 (320px - 375px) */
@media (max-width: 375px) {
    .product-showcase-section {
        padding: clamp(40px, 8vw, 60px) 0;
    }
    
    .header-row {
        gap: 16px;
    }
    
    .product-details h2 {
        font-size: 1.25rem;
    }
    
    .product-tagline {
        font-size: 0.75rem;
    }
    
    .badge-item {
        padding: 6px 12px;
    }
    
    .badge-item img {
        width: 32px;
    }
    
    .badge-item span {
        font-size: 0.6875rem;
    }
    
    .specs-table.comprehensive .spec-row {
        padding: 8px 4px;
        gap: 6px;
    }
    
    .specs-table.comprehensive .spec-name {
        font-size: 0.75rem;
    }
    
    .specs-table.comprehensive .spec-data {
        font-size: 0.8125rem;
    }
}

/* 大屏幕优化 (1440px - 1920px) */
@media (min-width: 1440px) {
    .product-showcase-section .product-main {
        max-width: 1400px;
    }
    
    .product-details h2 {
        font-size: clamp(2rem, 2.5vw, 3rem);
    }
    
    .product-tagline {
        font-size: clamp(1rem, 1.25vw, 1.125rem);
    }
    
    .product-main-image {
        min-height: clamp(350px, 25vw, 500px);
    }
    
    .badge-item img {
        width: clamp(50px, 4vw, 70px);
    }
    
    .badge-item span {
        font-size: clamp(0.8125rem, 0.9vw, 1rem);
    }
}

/* 打印样式 - 产品展示 */
@media print {
    .product-showcase-section {
        padding: 20px 0;
        background: #fff;
    }
    
    .product-showcase-container {
        flex-direction: row;
    }
    
    .badge-item {
        border: 1px solid #000;
    }
    
    .specs-table.comprehensive .spec-row {
        break-inside: avoid;
    }
}

/* ============================================
   无障碍支持 (Accessibility Support)
   ============================================ */

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    h1, h2, h3, h4, h5, h6, p, a, span, div {
        transition: none !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --text-dark: #000;
        --text-light: #333;
        --border-color: #000;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: #000;
        text-shadow: none;
    }
    
    p {
        color: #000;
    }
    
    a {
        color: #0000cc;
        text-decoration: underline;
    }
    
    a:hover,
    a:focus {
        color: #000;
        text-decoration: underline;
        outline: 2px solid #000;
    }
}

/* 强制颜色模式（Windows 高对比度） */
@media (forced-colors: active) {
    .btn-primary,
    .btn-secondary {
        border: 2px solid currentColor;
    }
    
    a:focus-visible {
        outline: 3px solid currentColor;
        outline-offset: 2px;
    }
}

/* 打印排版优化 */
@media print {
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    h1 {
        font-size: 24pt;
        page-break-after: avoid;
    }
    
    h2 {
        font-size: 20pt;
        page-break-after: avoid;
    }
    
    h3 {
        font-size: 16pt;
        page-break-after: avoid;
    }
    
    h4, h5, h6 {
        font-size: 14pt;
        page-break-after: avoid;
    }
    
    p {
        font-size: 12pt;
        orphans: 3;
        widows: 3;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
    
    blockquote {
        font-size: 12pt;
        border-left: 3pt solid #000;
        page-break-inside: avoid;
    }
    
    img {
        max-width: 100%;
        page-break-inside: avoid;
    }
    
    .no-print {
        display: none !important;
    }
}