/* ============================================
   TEMU x JH - 商务精英风格样式表
   设计理念：专业、高效、可信赖
   ============================================ */

/* ===== CSS 变量系统 ===== */
:root {
    /* 主题色彩 - 商务蓝金配色 */
    --primary-color: #1a365d;
    --primary-light: #2c5282;
    --primary-dark: #0d1b2a;
    --accent-color: #d69e2e;
    --accent-light: #ecc94b;
    --accent-dark: #b7791f;
    
    /* 功能色彩 */
    --success-color: #38a169;
    --info-color: #3182ce;
    --warning-color: #dd6b20;
    --danger-color: #e53e3e;
    
    /* 中性色彩 */
    --dark-color: #1a202c;
    --gray-900: #2d3748;
    --gray-800: #4a5568;
    --gray-700: #718096;
    --gray-600: #a0aec0;
    --gray-500: #cbd5e0;
    --gray-400: #e2e8f0;
    --gray-300: #edf2f7;
    --gray-200: #f7fafc;
    --gray-100: #fafbfc;
    --bg-white: #ffffff;
    
    /* 背景层次 */
    --bg-light: #f8fafc;
    --bg-gradient-start: #f7fafc;
    --bg-gradient-end: #edf2f7;
    
    /* 边框与阴影 */
    --border-color: #e2e8f0;
    --border-light: #f0f4f8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 35px 60px -15px rgba(0, 0, 0, 0.3);
    
    /* 玻璃拟态效果 */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bezier: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 字体系统 */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-heading: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    
    /* 间距系统 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    /* 圆角系统 */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* ===== 全局重置与基础样式 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-800);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

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

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition);
}

.navbar.scrolled {
    height: 64px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo-temu {
    color: var(--primary-color);
    font-weight: 800;
}

.logo-divider {
    color: var(--gray-500);
    font-weight: 400;
    margin: 0 var(--space-xs);
}

.logo-jh {
    color: var(--accent-color);
    font-weight: 700;
}

.logo-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.2s;
    align-items: center;
}

.nav-menu.ready {
    opacity: 1;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    padding: 10px 16px;
    position: relative;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 8px;
    white-space: nowrap;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: rgba(26, 54, 93, 0.04);
}

.nav-menu a:hover::before {
    opacity: 1;
}

.nav-menu a.active {
    color: var(--primary-color);
    background: rgba(26, 54, 93, 0.06);
}

.nav-menu a.active::before {
    opacity: 1;
}

.nav-icon {
    font-size: 16px;
    opacity: 0.7;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    gap: 5px;
    border-radius: var(--radius);
    transition: background var(--transition-fast);
}

.hamburger:hover {
    background: var(--gray-300);
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition);
}

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

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

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

/* ===== 语言切换器 ===== */
.language-switcher {
    display: flex;
    gap: 4px;
    background: rgba(26, 54, 93, 0.06);
    padding: 4px;
    border-radius: 10px;
    opacity: 0;
    transition: opacity 0.2s;
}

.language-switcher.ready {
    opacity: 1;
}

.lang-btn {
    padding: 8px 14px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang-btn:hover {
    color: var(--primary-color);
    background: rgba(26, 54, 93, 0.06);
}

.lang-btn.active {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    font-weight: 600;
}

.lang-flag {
    font-size: 16px;
}

/* ===== 主视觉区 Hero ===== */
.hero {
    padding: 160px 0 120px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
}

/* 背景装饰图案 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(26, 54, 93, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(214, 158, 46, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

/* 几何装饰线条 */
.hero::after {
    content: '';
    position: absolute;
    top: 15%;
    right: 3%;
    width: 500px;
    height: 500px;
    border: 1px solid rgba(26, 54, 93, 0.04);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInLeft 0.8s var(--transition-bezier);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 28px;
    box-shadow: 0 4px 15px rgba(26, 54, 93, 0.25);
}

.hero-badge-icon {
    font-size: 14px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 52px;
    font-weight: 800;
    color: var(--dark-color);
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    margin-bottom: 32px;
    font-weight: 400;
    line-height: 1.6;
}

.hero-desc {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 28px 32px;
    margin-bottom: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-light);
}

.hero-desc-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero-desc ul {
    list-style: none;
    padding: 0;
}

.hero-desc li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 16px;
    font-size: 15px;
    color: var(--gray-800);
    font-weight: 500;
    line-height: 1.5;
}

.hero-desc li:last-child {
    margin-bottom: 0;
}

.hero-desc li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-desc li::after {
    content: '✓';
    position: absolute;
    left: 6px;
    top: 6px;
    font-size: 11px;
    color: white;
    font-weight: 700;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(26, 54, 93, 0.3);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(26, 54, 93, 0.35);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-icon {
    font-size: 16px;
    transition: transform 0.3s ease;
}

.cta-button:hover .cta-icon {
    transform: translateX(3px);
}

/* Hero 视频区域 - 竖屏视频适配 */
.hero-video-wrapper {
    position: relative;
    animation: fadeInRight 0.8s var(--transition-bezier);
}

.hero-video {
    width: 100%;
    max-width: 320px;
    aspect-ratio: 9 / 16;
    max-height: 500px;
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(145deg, #1a202c 0%, #2d3748 50%, #1a202c 100%);
    position: relative;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.35),
        0 0 0 1px rgba(255, 255, 255, 0.03);
}

/* 视频容器内微妙光效 */
.hero-video::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(26, 54, 93, 0.05) 0%,
        rgba(214, 158, 46, 0.03) 100%
    );
    pointer-events: none;
    z-index: 1;
}

.hero-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: none;
}

/* 视频播放控件样式 */
.hero-video video::-webkit-media-controls {
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}

.video-fallback {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #a0aec0;
    background: linear-gradient(145deg, #1a202c 0%, #2d3748 50%, #1a202c 100%);
}

.video-fallback.show {
    display: flex;
}

.fallback-icon {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.video-fallback p {
    font-size: 13px;
    text-align: center;
    padding: 0 24px;
    opacity: 0.6;
    color: #718096;
}

/* 视频加载动画 */
.video-loading {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(145deg, #1a202c 0%, #2d3748 100%);
}

.video-loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 区块标题 ===== */
.section-title {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
    color: var(--dark-color);
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    font-size: 16px;
    line-height: 1.8;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: var(--space-md) auto 0;
    border-radius: var(--radius-full);
}

/* ===== 流程图区域 ===== */
.flowchart-section {
    padding: var(--space-4xl) 0;
    background: var(--bg-white);
    position: relative;
}

.flowchart-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to bottom, var(--bg-light), var(--bg-white));
    pointer-events: none;
}

.flowchart-section-title {
    text-align: center;
    margin-bottom: var(--space-3xl);
    position: relative;
}

.flowchart-vertical {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    gap: var(--space-xs);
}

.flow-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    max-width: 200px;
}

.flow-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    box-shadow: 0 8px 25px rgba(26, 54, 93, 0.3);
    position: relative;
    z-index: 2;
}

.flow-number::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
    opacity: 0;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.4); opacity: 0; }
}

.flow-arrow-connector {
    width: 60px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.flow-arrow-connector svg {
    width: 100%;
    height: 100%;
    color: var(--gray-400);
}

.flow-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-md);
    min-height: 180px;
    width: 100%;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.flow-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform var(--transition);
}

.flow-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.flow-card:hover::before {
    transform: scaleX(1);
}

.flow-icon {
    font-size: 42px;
    margin-bottom: var(--space-md);
    transition: transform var(--transition);
}

.flow-card:hover .flow-icon {
    transform: scale(1.1);
}

.flow-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: var(--space-xs);
}

.flow-content p {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.5;
    margin: 0;
}

/* ===== PDF 产品展示 ===== */
.products {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--gray-200) 100%);
}

.pdf-section {
    max-width: 900px;
    margin: 0 auto;
}

.pdf-viewer {
    width: 100%;
    height: 80vh;
    max-height: 800px;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.pdf-viewer canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.pdf-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.pdf-btn {
    width: 48px;
    height: 48px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: var(--gray-700);
    box-shadow: var(--shadow-sm);
}

.pdf-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

#pdf-page-info {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    min-width: 80px;
    text-align: center;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-white);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

/* ===== TikTok MCN 区域 ===== */
.stores {
    padding: var(--space-4xl) 0;
    background: var(--bg-white);
}

.store-grid {
    display: grid;
    grid-template-columns: 1fr;
    max-width: 700px;
    margin: 0 auto;
}

.store-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.store-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.company-card {
    border: 2px solid transparent;
    background: linear-gradient(var(--bg-white), var(--bg-white)) padding-box,
                linear-gradient(135deg, var(--primary-color), var(--accent-color)) border-box;
}

.company-card:hover {
    border-color: transparent;
    transform: translateY(-4px);
}

.company-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    padding: var(--space-2xl);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.company-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.company-icon {
    font-size: 56px;
    margin-bottom: var(--space-md);
    display: block;
}

.company-logo {
    height: 64px;
    width: auto;
    margin: 0 auto var(--space-md);
    display: block;
}

.company-header h3 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
}

.company-tagline {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: 1px;
}

.company-info {
    padding: var(--space-xl);
    background: var(--bg-white);
}

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

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

.info-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--gray-300), var(--gray-400));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.info-content {
    flex: 1;
}

.info-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.info-emails {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-value {
    font-size: 15px;
    color: var(--gray-800);
    font-weight: 500;
    transition: color var(--transition-fast);
    word-break: break-all;
}

a.info-value:hover {
    color: var(--primary-color);
}

/* 联系方式卡片 */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.contact-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.contact-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-4px);
}

.contact-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto var(--space-md);
    color: white;
}

.contact-card-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-xs);
}

.contact-card-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-800);
    word-break: break-all;
}

/* ===== 关于我们 ===== */
.about {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--gray-200) 100%);
}

.founder-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.founder-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.founder-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 40px rgba(26, 54, 93, 0.3);
    position: relative;
}

.founder-avatar::before {
    content: '';
    position: absolute;
    inset: -4px;
    border: 3px solid var(--accent-color);
    border-radius: 50%;
    opacity: 0.5;
}

.avatar-placeholder {
    font-size: 56px;
}

.founder-card h3 {
    font-family: var(--font-heading);
    font-size: 26px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--space-xs);
}

.founder-title {
    font-size: 14px;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    display: inline-block;
    padding: 6px 16px;
    background: rgba(214, 158, 46, 0.1);
    border-radius: var(--radius-full);
}

.founder-info {
    margin: var(--space-xl) 0;
    text-align: left;
    background: var(--gray-100);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
}

.about-highlight {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
    border-left: 4px solid var(--accent-color);
    text-align: left;
}

.about-desc {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
    text-align: left;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(135deg, var(--dark-color), var(--gray-900));
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 400px;
}

.footer-brand .logo {
    margin-bottom: var(--space-lg);
}

.footer-brand .logo h1 {
    color: white;
}

.footer-brand p {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.8;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-lg);
    position: relative;
    padding-bottom: var(--space-sm);
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-light));
    border-radius: var(--radius-full);
}

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

.footer-col ul li {
    margin-bottom: var(--space-sm);
}

.footer-col ul li a {
    color: var(--gray-600);
    font-size: 14px;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer-col ul li a:hover {
    color: white;
    padding-left: var(--space-sm);
}

.footer-col ul li a::before {
    content: '→';
    font-size: 12px;
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-fast);
}

.footer-col ul li a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    color: var(--gray-600);
    font-size: 14px;
}

.footer-icon {
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.footer-icon svg {
    width: 100%;
    height: 100%;
}

.footer-contact-item a {
    color: var(--gray-600);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--gray-800);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--gray-700);
}

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.product-card,
.store-card,
.media-item,
.spotlight-item,
.founder-card {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }
.product-card:nth-child(4) { animation-delay: 0.4s; }

.store-card:nth-child(1) { animation-delay: 0.1s; }
.store-card:nth-child(2) { animation-delay: 0.2s; }
.store-card:nth-child(3) { animation-delay: 0.3s; }
.store-card:nth-child(4) { animation-delay: 0.4s; }

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-200);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-full);
}

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

/* ===== 响应式设计 - 平板适配 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    :root {
        --space-xl: 24px;
        --space-2xl: 40px;
        --space-3xl: 56px;
        --space-4xl: 80px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .hero-video-wrapper {
        order: -1;
        display: flex;
        justify-content: center;
    }
    
    .hero-video {
        max-width: 280px;
        aspect-ratio: 9 / 16;
        max-height: 400px;
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: 44px;
    }
    
    .hero-desc {
        text-align: left;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .footer-brand {
        max-width: 100%;
    }
    
    .flowchart-vertical {
        flex-wrap: wrap;
        gap: var(--space-lg);
        justify-content: center;
    }
    
    .flow-item {
        max-width: 180px;
    }
    
    .flow-arrow-connector {
        display: none;
    }
}

/* ===== 响应式设计 - 手机适配 (768px 及以下) ===== */
@media (max-width: 768px) {
    :root {
        --space-xl: 20px;
        --space-2xl: 32px;
        --space-3xl: 48px;
        --space-4xl: 64px;
    }
    
    .navbar {
        height: 64px;
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .logo h1 {
        font-size: 18px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 12px 20px;
        box-shadow: var(--shadow-md);
        gap: 4px;
        border-top: 1px solid var(--border-light);
    }
    
    .nav-menu.active {
        display: flex;
        animation: fadeInUp 0.3s ease;
    }
    
    .nav-menu a {
        padding: 14px 16px;
        border-radius: 10px;
        background: transparent;
        font-size: 15px;
    }
    
    .nav-menu a:hover {
        background: rgba(26, 54, 93, 0.08);
        color: var(--primary-color);
    }
    
    .nav-menu a::before {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .language-switcher {
        position: absolute;
        top: 70px;
        right: 16px;
        background: var(--bg-white);
        padding: 8px;
        border-radius: 12px;
        box-shadow: var(--shadow-md);
        display: none;
        flex-direction: column;
        gap: 4px;
        z-index: 999;
    }
    
    .language-switcher.active {
        display: flex;
    }
    
    .lang-btn {
        width: 100%;
        justify-content: flex-start;
        padding: var(--space-sm) var(--space-md);
    }
    
    .hero {
        padding: 110px 0 80px;
        min-height: auto;
    }
    
    .hero-content {
        padding: 0 24px;
    }
    
    .hero-badge {
        font-size: 11px;
        padding: 8px 16px;
        margin-bottom: 24px;
    }
    
    .hero-title {
        font-size: 40px;
        margin-bottom: 16px;
    }
    
    .hero-subtitle {
        font-size: 18px;
        margin-bottom: 28px;
    }
    
    .hero-desc {
        padding: 24px 28px;
        margin-bottom: 28px;
    }
    
    .hero-desc li {
        font-size: 14px;
        margin-bottom: 14px;
    }
    
    .cta-button {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .hero-video {
        max-width: 280px;
        aspect-ratio: 9 / 16;
        max-height: 400px;
        margin: 0 auto;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 14px;
        padding: 0 var(--space-md);
    }
    
    .flow-item {
        max-width: 160px;
    }
    
    .flow-number {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
    
    .flow-card {
        padding: var(--space-lg) var(--space-sm);
        min-height: 160px;
    }
    
    .flow-icon {
        font-size: 36px;
    }
    
    .flow-content h4 {
        font-size: 14px;
    }
    
    .flow-content p {
        font-size: 12px;
    }
    
    .pdf-viewer {
        height: 60vh;
        border-radius: var(--radius-lg);
    }
    
    .company-header {
        padding: var(--space-xl);
    }
    
    .company-header h3 {
        font-size: 26px;
    }
    
    .company-info {
        padding: var(--space-lg);
    }
    
    .founder-card {
        padding: var(--space-xl);
    }
    
    .founder-avatar {
        width: 100px;
        height: 100px;
    }
    
    .avatar-placeholder {
        font-size: 48px;
    }
    
    .footer {
        padding: var(--space-2xl) 0 var(--space-lg);
    }
    
    .footer-col {
        margin-bottom: var(--space-xl);
    }
    
    .footer-col:last-child {
        margin-bottom: 0;
    }
}

/* ===== 响应式设计 - 小屏幕手机 (480px 及以下) ===== */
@media (max-width: 480px) {
    :root {
        --space-lg: 16px;
        --space-xl: 20px;
        --space-2xl: 24px;
        --space-3xl: 40px;
        --space-4xl: 56px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .logo-badge {
        display: none;
    }
    
    .hero {
        padding: 90px 0 60px;
    }
    
    .hero-content {
        padding: 0 20px;
    }
    
    .hero-badge {
        font-size: 10px;
        padding: 6px 14px;
        margin-bottom: 20px;
    }
    
    .hero-title {
        font-size: 32px;
        letter-spacing: -0.5px;
        margin-bottom: 14px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 24px;
    }
    
    .hero-desc {
        padding: 20px 24px;
        margin-bottom: 24px;
    }
    
    .hero-desc li {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    .hero-video {
        max-width: 240px;
        aspect-ratio: 9 / 16;
        max-height: 360px;
        margin: 0 auto;
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .flow-item {
        max-width: 140px;
    }
    
    .flow-card {
        padding: var(--space-md) var(--space-xs);
        min-height: 140px;
    }
    
    .flow-icon {
        font-size: 32px;
    }
    
    .flow-content h4 {
        font-size: 13px;
    }
    
    .flow-content p {
        font-size: 11px;
    }
    
    .pdf-viewer {
        height: 50vh;
        border-radius: var(--radius);
    }
    
    .pdf-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .company-header h3 {
        font-size: 22px;
    }
    
    .founder-card {
        padding: var(--space-lg);
    }
    
    .founder-avatar {
        width: 80px;
        height: 80px;
    }
    
    .avatar-placeholder {
        font-size: 40px;
    }
    
    .founder-card h3 {
        font-size: 22px;
    }
    
    .info-item {
        padding: var(--space-sm) 0;
    }
    
    .footer-col h4 {
        font-size: 14px;
    }
}

/* ===== 平板横屏模式 ===== */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }
    
    .hero-content {
        grid-template-columns: 1fr 320px;
        gap: 40px;
    }
    
    .hero-video {
        max-width: 280px;
        aspect-ratio: 9 / 16;
        max-height: 400px;
    }
}

/* ===== 触摸设备优化 ===== */
@media (hover: none) and (pointer: coarse) {
    .flow-card:hover {
        transform: none;
    }
    
    .store-card:hover {
        transform: none;
    }
    
    .cta-button:hover {
        transform: none;
    }
    
    .nav-menu a:hover {
        background: var(--primary-color);
        color: white;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .hamburger,
    .language-switcher,
    .cta-button {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero,
    .flowchart-section,
    .products,
    .stores,
    .about,
    .footer {
        padding: 20px 0;
        background: white;
    }
}

/* ===== 深色模式支持 (可选) ===== */
@media (prefers-color-scheme: dark) {
    :root {
        /* 可以添加深色模式变量覆盖 */
    }
}

/* ===== 减少动画 (无障碍) ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}