/* ========================================
   智店星收银 - 官方网站样式
   简约商务风格设计
   ======================================== */

/* CSS 变量定义 */
:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 文字颜色 */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    /* 背景色 */
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    
    /* 边框 */
    --border-color: #e5e7eb;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-2xl: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

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

/* ========================================
   容器
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

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

.btn-white:hover {
    background-color: var(--gray-100);
    transform: translateY(-2px);
}

.btn-outline-white {
    background-color: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--primary-color);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: white;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.mobile-nav-links a {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
}

.mobile-nav-links a:hover {
    background-color: var(--gray-100);
    color: var(--primary-color);
}

.mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    position: relative;
    padding: 140px 0 100px;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--primary-bg);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 24px;
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Hero 图片区域 */
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
}

/* POS 模拟器 */
.pos-mockup {
    position: relative;
    width: 320px;
}

.pos-screen {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-radius: 16px 16px 0 0;
    padding: 16px;
    box-shadow: var(--shadow-xl);
}

.pos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pos-title {
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.pos-time {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

.pos-content {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 16px;
}

.pos-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pos-item:last-of-type {
    border-bottom: none;
}

.pos-total {
    display: flex;
    justify-content: space-between;
    padding-top: 12px;
    margin-top: 8px;
    border-top: 1px dashed rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: 600;
}

.total-price {
    color: #10b981;
    font-size: 1.25rem;
}

.pos-actions {
    display: flex;
    gap: 8px;
}

.pos-btn {
    flex: 1;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 0.75rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.pos-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

.pos-btn.primary:hover {
    background: var(--primary-dark);
}

.pos-base {
    height: 20px;
    background: linear-gradient(180deg, #374151 0%, #1f2937 100%);
    border-radius: 0 0 8px 8px;
}

/* 浮动卡片 */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 500;
    animation: float 3s ease-in-out infinite;
}

.floating-card svg {
    width: 20px;
    height: 20px;
}

.floating-card.card-1 {
    top: 20px;
    right: -40px;
    color: var(--success-color);
    animation-delay: 0s;
}

.floating-card.card-2 {
    bottom: 60px;
    left: -60px;
    color: var(--primary-color);
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Hero 背景 */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
}

.hero-bg-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(37, 99, 235, 0.05) 1px, transparent 0);
    background-size: 40px 40px;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.partners-title {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 32px;
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 48px;
}

.partner-logo {
    padding: 16px 32px;
    background: white;
    border-radius: var(--border-radius);
    color: var(--text-muted);
    font-size: 0.9375rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.partner-logo:hover {
    color: var(--text-secondary);
    box-shadow: var(--shadow);
}

/* ========================================
   通用区块标题
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--primary-bg);
    color: var(--primary-color);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 16px;
    margin-bottom: 16px;
}

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

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   产品展示
   ======================================== */
.products {
    padding: var(--section-padding);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    position: relative;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: 32px;
    transition: all var(--transition-normal);
}

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

.product-card.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: linear-gradient(135deg, var(--primary-bg) 0%, white 100%);
    border-color: var(--primary-light);
}

.product-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 6px 12px;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 12px;
}

.product-image {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

/* 产品模拟图 */
.product-mockup {
    position: relative;
}

.product-mockup.type-1 {
    width: 200px;
}

.product-mockup.type-1 .mockup-screen {
    width: 200px;
    height: 140px;
    background: linear-gradient(180deg, #1e293b 0%, #334155 100%);
    border-radius: 12px 12px 0 0;
    position: relative;
}

.product-mockup.type-1 .mockup-screen::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 6px;
    opacity: 0.5;
}

.product-mockup.type-1 .mockup-keyboard {
    width: 200px;
    height: 60px;
    background: linear-gradient(180deg, #4b5563 0%, #374151 100%);
    border-radius: 0 0 12px 12px;
}

.product-mockup.type-2 {
    width: 140px;
}

.product-mockup.type-2 .mockup-body {
    width: 140px;
    height: 180px;
    background: linear-gradient(180deg, #374151 0%, #1f2937 100%);
    border-radius: 16px;
    position: relative;
}

.product-mockup.type-2 .mockup-body::after {
    content: '';
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 40px;
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    border-radius: 8px;
    opacity: 0.6;
}

.product-mockup.type-3 {
    width: 160px;
}

.product-mockup.type-3 .mockup-tablet {
    width: 160px;
    height: 110px;
    background: linear-gradient(180deg, #1f2937 0%, #111827 100%);
    border-radius: 12px;
    position: relative;
}

.product-mockup.type-3 .mockup-tablet::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    background: linear-gradient(135deg, #93c5fd 0%, #3b82f6 100%);
    border-radius: 6px;
    opacity: 0.5;
}

.product-mockup.type-3 .mockup-stand {
    width: 60px;
    height: 40px;
    background: linear-gradient(180deg, #6b7280 0%, #4b5563 100%);
    margin: 0 auto;
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
}

.product-mockup.type-4 {
    width: 100px;
}

.product-mockup.type-4 .mockup-kiosk {
    width: 100px;
    height: 200px;
    background: linear-gradient(180deg, #374151 0%, #1f2937 100%);
    border-radius: 12px 12px 4px 4px;
    position: relative;
}

.product-mockup.type-4 .mockup-kiosk::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    height: 120px;
    background: linear-gradient(135deg, #60a5fa 0%, #2563eb 100%);
    border-radius: 6px;
    opacity: 0.6;
}

.product-mockup.type-4 .mockup-kiosk::after {
    content: '';
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 8px;
    background: #6b7280;
    border-radius: 4px;
}

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

.product-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-desc {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.product-features li svg {
    width: 18px;
    height: 18px;
    color: var(--success-color);
    flex-shrink: 0;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 20px;
}

.price-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.price-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* ========================================
   核心功能
   ======================================== */
.features {
    padding: var(--section-padding);
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: var(--border-radius-lg);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
}

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

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   解决方案
   ======================================== */
.solutions {
    padding: var(--section-padding);
}

.solutions-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

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

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

.solutions-content {
    position: relative;
}

.solution-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: var(--bg-light);
    border-radius: var(--border-radius-2xl);
    padding: 60px;
}

.solution-panel.active {
    display: grid;
}

.solution-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.solution-info > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.solution-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
    padding-left: 24px;
    position: relative;
}

.solution-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
}

.solution-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.solution-mockup {
    width: 100%;
    max-width: 400px;
    height: 280px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--border-radius-xl);
    position: relative;
    overflow: hidden;
}

.solution-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
}

.solution-mockup::after {
    content: '';
    position: absolute;
    top: 40px;
    left: 40px;
    width: 60%;
    height: 40%;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius);
}

/* ========================================
   关于我们
   ======================================== */
.about {
    padding: var(--section-padding);
    background-color: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-info .section-badge {
    margin-bottom: 16px;
}

.about-info .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-highlights {
    display: flex;
    gap: 40px;
    margin-top: 32px;
}

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

.highlight-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 8px;
}

.highlight-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.about-image-wrapper {
    position: relative;
}

.about-photo {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--border-radius-2xl);
    position: relative;
    overflow: hidden;
}

.about-photo::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-decoration {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    background: var(--primary-bg);
    border-radius: var(--border-radius-2xl);
    z-index: -1;
}

/* ========================================
   联系我们
   ======================================== */
.contact {
    padding: var(--section-padding);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: flex-start;
}

.contact-info .section-badge {
    margin-bottom: 16px;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.contact-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-bg);
    border-radius: var(--border-radius-lg);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    color: var(--primary-color);
}

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

.contact-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.contact-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* 联系表单 */
.contact-form-wrapper {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

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

.form-note {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 16px;
}

/* ========================================
   CTA 区域
   ======================================== */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding-top: 80px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

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

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

.footer-desc {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

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

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

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    flex-wrap: wrap;
    gap: 16px;
}

.copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-legal a:hover {
    color: white;
}

/* ========================================
   回到顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

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

.back-to-top svg {
    width: 24px;
    height: 24px;
}

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

/* 大屏幕平板 */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-description {
        margin: 0 auto 32px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card.featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-panel {
        grid-template-columns: 1fr;
        padding: 40px;
    }
    
    .solution-image {
        order: -1;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image-wrapper {
        order: -1;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 平板 */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .pos-mockup {
        width: 280px;
    }
    
    .floating-card {
        display: none;
    }
    
    .partners-logos {
        gap: 24px;
    }
    
    .partner-logo {
        padding: 12px 20px;
        font-size: 0.8125rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .solutions-tabs {
        gap: 4px;
    }
    
    .tab-btn {
        padding: 10px 16px;
        font-size: 0.875rem;
    }
    
    .solution-panel {
        padding: 24px;
    }
    
    .about-highlights {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .about-photo {
        height: 280px;
    }
    
    .about-decoration {
        display: none;
    }
    
    .contact-form-wrapper {
        padding: 24px;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* 手机 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        justify-content: space-between;
    }
    
    .stat-item {
        flex: 1;
        min-width: 80px;
    }
    
    .product-card {
        padding: 20px;
    }
    
    .product-name {
        font-size: 1.25rem;
    }
    
    .highlight-number {
        font-size: 2rem;
    }
    
    .contact-methods {
        gap: 16px;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 滚动时显示动画 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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