/*
 * Jeniferbio - Xi'an Jenifer Technology Co., Ltd
 * Premium B2B Website Template
 * Cosmetic Peptides | Human Supplements | Natural Extract
 * Version: 1.0.0
 */

/* ================================
   CSS Variables - Design System
   ================================ */
:root {
    /* Primary Colors - Natural Green (from Logo #42973A) */
    --jb-primary: #42973A;
    --jb-primary-light: #4FA946;
    --jb-primary-dark: #357A2E;
    --jb-primary-rgb: 66, 151, 58;
    
    /* Secondary Colors - Warm Gold (complement to green) */
    --jb-secondary: #D4A84B;
    --jb-secondary-light: #E0BC6A;
    --jb-secondary-dark: #B8923D;
    --jb-secondary-rgb: 212, 168, 75;
    
    /* Accent Colors - Deep Teal */
    --jb-accent: #2A7B6F;
    --jb-accent-light: #3A9B8C;
    --jb-accent-dark: #1E5F56;
    
    /* Neutral Colors */
    --jb-white: #FFFFFF;
    --jb-black: #1A1A1A;
    --jb-gray-100: #F8F9FA;
    --jb-gray-200: #E9ECEF;
    --jb-gray-300: #DEE2E6;
    --jb-gray-400: #CED4DA;
    --jb-gray-500: #ADB5BD;
    --jb-gray-600: #6C757D;
    --jb-gray-700: #495057;
    --jb-gray-800: #343A40;
    --jb-gray-900: #212529;
    
    /* Typography - Poppins (Modern & Professional for Biotech/Beauty) */
    --jb-font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --jb-font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --jb-font-size-base: 16px;
    --jb-line-height-base: 1.6;
    
    /* Spacing */
    --jb-spacing-xs: 0.25rem;
    --jb-spacing-sm: 0.5rem;
    --jb-spacing-md: 1rem;
    --jb-spacing-lg: 1.5rem;
    --jb-spacing-xl: 2rem;
    --jb-spacing-2xl: 3rem;
    --jb-spacing-3xl: 4rem;
    
    /* Borders */
    --jb-border-radius: 8px;
    --jb-border-radius-lg: 16px;
    --jb-border-radius-xl: 24px;
    --jb-border-radius-full: 9999px;
    
    /* Shadows */
    --jb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --jb-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --jb-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --jb-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --jb-shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --jb-transition-fast: 0.15s ease;
    --jb-transition: 0.3s ease;
    --jb-transition-slow: 0.5s ease;
    
    /* Container */
    --jb-container-max: 1320px;
    --jb-container-padding: 1.5rem;
}

/* ================================
   Reset & Base Styles
   ================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--jb-font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--jb-font-body);
    font-size: 1rem;
    line-height: var(--jb-line-height-base);
    color: var(--jb-gray-800);
    background-color: var(--jb-white);
    overflow-x: hidden;
}

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

a {
    color: var(--jb-primary);
    text-decoration: none;
    transition: color var(--jb-transition);
}

a:hover {
    color: var(--jb-secondary);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--jb-font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--jb-primary);
    margin-bottom: var(--jb-spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--jb-spacing-md);
}

/* ================================
   Utility Classes
   ================================ */
.container {
    width: 100%;
    max-width: var(--jb-container-max);
    margin: 0 auto;
    padding: 0 var(--jb-container-padding);
}

.section {
    padding: var(--jb-spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--jb-spacing-3xl);
}

.section-title .tagline {
    display: inline-block;
    font-family: var(--jb-font-body);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--jb-secondary);
    margin-bottom: var(--jb-spacing-sm);
    position: relative;
    padding: 0 var(--jb-spacing-xl);
}

.section-title .tagline::before,
.section-title .tagline::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--jb-secondary), transparent);
}

.section-title .tagline::before {
    left: 0;
    background: linear-gradient(270deg, var(--jb-secondary), transparent);
}

.section-title .tagline::after {
    right: 0;
}

.section-title h2 {
    margin-bottom: var(--jb-spacing-md);
}

.section-title p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--jb-gray-600);
}

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--jb-primary); }
.text-secondary { color: var(--jb-secondary); }
.text-accent { color: var(--jb-accent); }
.text-white { color: var(--jb-white); }
.text-muted { color: var(--jb-gray-600); }

/* Background Utilities */
.bg-primary { background-color: var(--jb-primary); }
.bg-secondary { background-color: var(--jb-secondary); }
.bg-accent { background-color: var(--jb-accent); }
.bg-white { background-color: var(--jb-white); }
.bg-light { background-color: var(--jb-gray-100); }
.bg-dark { background-color: var(--jb-gray-900); }

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--jb-spacing-sm);
    padding: 0.875rem 2rem;
    font-family: var(--jb-font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid transparent;
    border-radius: var(--jb-border-radius-full);
    cursor: pointer;
    transition: all var(--jb-transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--jb-primary), var(--jb-primary-light));
    color: var(--jb-white);
    border-color: var(--jb-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--jb-primary-dark), var(--jb-primary));
    transform: translateY(-2px);
    box-shadow: var(--jb-shadow-md);
    color: var(--jb-white);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--jb-secondary), var(--jb-secondary-light));
    color: var(--jb-white);
    border-color: var(--jb-secondary);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--jb-secondary-dark), var(--jb-secondary));
    transform: translateY(-2px);
    box-shadow: var(--jb-shadow-md);
    color: var(--jb-white);
}

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

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

.btn-outline-white {
    background: transparent;
    color: var(--jb-white);
    border-color: var(--jb-white);
}

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

/* ================================
   Header & Navigation
   ================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: all var(--jb-transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--jb-shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--jb-spacing-lg) 0;
    transition: padding var(--jb-transition);
}

.header.scrolled .header-inner {
    padding: var(--jb-spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-sm);
}

.logo img {
    height: 80px;
    width: auto;
}

.logo-text {
    font-family: var(--jb-font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--jb-white);
    transition: color var(--jb-transition);
}

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

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-xl);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-lg);
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    padding: var(--jb-spacing-sm) var(--jb-spacing-md);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--jb-white);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    position: relative;
    transition: color var(--jb-transition);
}

.header.scrolled .nav-menu > li > a {
    color: var(--jb-gray-700);
}

.nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--jb-secondary);
    transition: all var(--jb-transition);
    transform: translateX(-50%);
}

.nav-menu > li > a:hover::after,
.nav-menu > li.active > a::after {
    width: 80%;
}

.nav-menu > li > a:hover,
.nav-menu > li.active > a {
    color: var(--jb-secondary);
}

.header.scrolled .nav-menu > li > a:hover,
.header.scrolled .nav-menu > li.active > a {
    color: var(--jb-secondary);
}

/* Dropdown Menu */
.nav-menu .dropdown {
    position: relative;
}

.nav-menu .dropdown > a::before {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-top-color: currentColor;
    transition: transform var(--jb-transition);
}

.nav-menu .dropdown:hover > a::before {
    transform: translateY(-50%); /* 去掉旋转效果 */
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--jb-white);
    border-radius: var(--jb-border-radius);
    box-shadow: var(--jb-shadow-lg);
    padding: var(--jb-spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--jb-transition);
}

.nav-menu .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--jb-spacing-sm) var(--jb-spacing-lg);
    color: var(--jb-gray-700);
    font-size: 0.875rem;
    transition: all var(--jb-transition);
}

.dropdown-menu li a:hover {
    background: var(--jb-gray-100);
    color: var(--jb-secondary);
    padding-left: calc(var(--jb-spacing-lg) + 5px);
}

/* Header Contact */
.header-contact {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-lg);
}

.header-contact a {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-sm);
    color: var(--jb-white);
    font-weight: 500;
}

.header.scrolled .header-contact a {
    color: var(--jb-primary);
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: var(--jb-spacing-sm);
}

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--jb-white);
    transition: all var(--jb-transition);
}

.header.scrolled .mobile-toggle span {
    background: var(--jb-primary);
}

/* ================================
   Hero Section / Slider
   ================================ */
.hero {
    position: relative;
    overflow: hidden;
}

.hero-slider {
    position: relative;
    width: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transition: opacity 1s ease;
}

.hero-slide:first-child {
    position: relative;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-slide-img {
    width: 100%;
    height: auto;
    display: block;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    /* 黑色调+淡淡绿色 */
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.4) 0%,
        rgba(var(--jb-primary-rgb), 0.2) 50%,
        rgba(0, 0, 0, 0.3) 100%
    );
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    color: var(--jb-white);
    padding: var(--jb-spacing-3xl) 0;
}

.hero-tagline {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.8); /* 轮播图标语白色 */
    margin-bottom: var(--jb-spacing-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.3s forwards;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--jb-white);
    line-height: 1.1;
    margin-bottom: var(--jb-spacing-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.5s forwards;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--jb-spacing-xl);
    opacity: 0.9;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.7s forwards;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--jb-spacing-md);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.9s forwards;
}

/* Slider Navigation */
.slider-nav {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--jb-spacing-sm);
    z-index: 20;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all var(--jb-transition);
}

.slider-dot.active,
.slider-dot:hover {
    background: #FFFFFF; /* 轮播图小圆点白色 */
    transform: scale(1.2);
}

/* ================================
   Features Section
   ================================ */
.features {
    padding: var(--jb-spacing-3xl) 0;
    background: var(--jb-white);
    position: relative;
    z-index: 30;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--jb-spacing-xl);
}

.feature-card {
    background: var(--jb-white);
    padding: var(--jb-spacing-2xl);
    border-radius: var(--jb-border-radius-lg);
    box-shadow: var(--jb-shadow-md);
    text-align: center;
    transition: all var(--jb-transition);
    position: relative;
    overflow: hidden;
}

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--jb-shadow-xl);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--jb-spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--jb-gray-100), var(--jb-white));
    border-radius: var(--jb-border-radius-lg);
    color: var(--jb-primary);
    font-size: 2rem;
    transition: all var(--jb-transition);
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--jb-primary), var(--jb-primary-light));
    color: var(--jb-white);
    /* 去掉旋转效果 */
}

.feature-card h4 {
    margin-bottom: var(--jb-spacing-sm);
}

.feature-card p {
    color: var(--jb-gray-600);
    font-size: 0.9375rem;
}

/* ================================
   Products Section
   ================================ */
.products {
    background: var(--jb-gray-100);
}

.product-categories {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--jb-spacing-md);
    margin-bottom: var(--jb-spacing-2xl);
}

.product-categories .cat-btn {
    padding: 0.75rem 1.5rem;
    background: var(--jb-white);
    border: 2px solid var(--jb-gray-300);
    border-radius: var(--jb-border-radius-full);
    color: var(--jb-gray-700);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--jb-transition);
}

.product-categories .cat-btn:hover,
.product-categories .cat-btn.active {
    background: var(--jb-primary);
    border-color: var(--jb-primary);
    color: var(--jb-white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--jb-spacing-xl);
}

.product-card {
    background: var(--jb-white);
    border-radius: var(--jb-border-radius-lg);
    overflow: hidden;
    box-shadow: var(--jb-shadow);
    transition: all var(--jb-transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--jb-shadow-xl);
}

.product-image {
    position: relative;
    padding-top: 100%;
    overflow: hidden;
    background: var(--jb-gray-100);
}

.product-image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--jb-transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: var(--jb-spacing-md);
    left: var(--jb-spacing-md);
    padding: 0.25rem 0.75rem;
    background: var(--jb-secondary);
    color: var(--jb-white);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--jb-border-radius-full);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(var(--jb-primary-rgb), 0.5); /* 减淡透明度，保持原色调 */
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--jb-transition);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-overlay .btn {
    transform: translateY(20px);
    transition: all var(--jb-transition);
}

.product-card:hover .product-overlay .btn {
    transform: translateY(0);
}

.product-info {
    padding: var(--jb-spacing-lg);
    text-align: center;
}

.product-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--jb-secondary);
    margin-bottom: var(--jb-spacing-xs);
}

.product-info h4 {
    font-size: 1.125rem;
    margin-bottom: var(--jb-spacing-sm);
    transition: color var(--jb-transition);
}

.product-card:hover .product-info h4 {
    color: var(--jb-secondary);
}

/* ================================
   About Section
   ================================ */
.about {
    position: relative;
    overflow: hidden;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--jb-spacing-3xl);
    align-items: center;
}

.about-images {
    position: relative;
}

.about-img-main {
    border-radius: var(--jb-border-radius-xl);
    overflow: hidden;
    box-shadow: var(--jb-shadow-xl);
}

.about-img-secondary {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 60%;
    border-radius: var(--jb-border-radius-xl);
    overflow: hidden;
    box-shadow: var(--jb-shadow-xl);
    border: 5px solid var(--jb-white);
}

.about-badge {
    position: absolute;
    top: 30px;
    left: -20px;
    background: var(--jb-secondary);
    color: var(--jb-white);
    padding: var(--jb-spacing-lg);
    border-radius: var(--jb-border-radius-lg);
    text-align: center;
    box-shadow: var(--jb-shadow-lg);
}

.about-badge .number {
    font-family: var(--jb-font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.about-badge .text {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.about-content {
    padding: var(--jb-spacing-xl) 0;
}

.about-content .tagline {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--jb-secondary);
    margin-bottom: var(--jb-spacing-md);
}

.about-content h2 {
    margin-bottom: var(--jb-spacing-lg);
}

.about-content p {
    color: var(--jb-gray-600);
    margin-bottom: var(--jb-spacing-lg);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--jb-spacing-lg);
    margin: var(--jb-spacing-xl) 0;
}

.about-feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--jb-spacing-md);
}

.about-feature-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--jb-gray-100);
    border-radius: 50%;
    color: var(--jb-secondary);
    flex-shrink: 0;
}

.about-feature-item span {
    font-weight: 500;
    color: var(--jb-gray-800);
}

/* ================================
   Stats Counter
   ================================ */
.stats {
    background: linear-gradient(135deg, var(--jb-primary), var(--jb-primary-dark));
    color: var(--jb-white);
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>');
    background-size: 200px;
    opacity: 0.5;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--jb-spacing-xl);
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: var(--jb-spacing-lg);
}

.stat-number {
    font-family: var(--jb-font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--jb-spacing-sm);
}

.stat-label {
    font-size: 0.9375rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ================================
   Contact Section
   ================================ */
.contact {
    background: var(--jb-gray-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--jb-spacing-3xl);
}

.contact-info {
    background: var(--jb-primary);
    color: var(--jb-white);
    padding: var(--jb-spacing-2xl);
    border-radius: var(--jb-border-radius-xl);
}

.contact-info h3 {
    color: var(--jb-white);
    margin-bottom: var(--jb-spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--jb-spacing-md);
    margin-bottom: var(--jb-spacing-lg);
}

.contact-item i {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-item-content h5 {
    color: var(--jb-white);
    margin-bottom: var(--jb-spacing-xs);
    font-size: 1rem;
}

.contact-item-content p,
.contact-item-content a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
}

.contact-item-content a:hover {
    color: var(--jb-secondary-light);
}

.contact-form {
    background: var(--jb-white);
    padding: var(--jb-spacing-2xl);
    border-radius: var(--jb-border-radius-xl);
    box-shadow: var(--jb-shadow-lg);
}

.form-group {
    margin-bottom: var(--jb-spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--jb-spacing-sm);
    color: var(--jb-gray-700);
}

.form-control {
    width: 100%;
    padding: 0.875rem var(--jb-spacing-lg);
    border: 2px solid var(--jb-gray-200);
    border-radius: var(--jb-border-radius);
    font-family: var(--jb-font-body);
    font-size: 1rem;
    transition: border-color var(--jb-transition), box-shadow var(--jb-transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--jb-primary);
    box-shadow: 0 0 0 3px rgba(var(--jb-primary-rgb), 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--jb-gray-900);
    color: var(--jb-gray-400);
}

.footer-main {
    padding: var(--jb-spacing-3xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--jb-spacing-2xl);
}

.footer-brand p {
    margin: var(--jb-spacing-lg) 0;
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: var(--jb-spacing-sm);
    margin-top: var(--jb-spacing-lg);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--jb-white);
    transition: all var(--jb-transition);
}

.footer-social a:hover {
    background: var(--jb-secondary);
    transform: translateY(-3px);
}

.footer-title {
    color: var(--jb-white);
    font-size: 1.125rem;
    margin-bottom: var(--jb-spacing-lg);
    position: relative;
    padding-bottom: var(--jb-spacing-md);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--jb-secondary);
}

.footer-links li {
    margin-bottom: var(--jb-spacing-sm);
}

.footer-links a {
    color: var(--jb-gray-400);
    transition: all var(--jb-transition);
    display: inline-flex;
    align-items: center;
    gap: var(--jb-spacing-sm);
}

.footer-links a:hover {
    color: var(--jb-secondary);
    padding-left: var(--jb-spacing-sm);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--jb-spacing-md);
    margin-bottom: var(--jb-spacing-md);
}

.footer-contact-item i {
    color: var(--jb-secondary);
    margin-top: 3px;
}

.footer-contact-item a {
    color: var(--jb-gray-400);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--jb-spacing-lg) 0;
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.875rem;
}

/* ================================
   Page Header / Breadcrumb
   ================================ */
.page-header {
    position: relative;
    padding: 180px 0 100px;
    background-size: cover;
    background-position: center;
    text-align: center;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    /* 黑色调覆盖层 */
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.75) 0%,
        rgba(20, 20, 20, 0.65) 100%
    );
}

.page-header-content {
    position: relative;
    z-index: 1;
    color: var(--jb-white);
}

.page-header h1 {
    color: var(--jb-white);
    margin-bottom: var(--jb-spacing-lg);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--jb-spacing-sm);
    flex-wrap: wrap;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: var(--jb-spacing-sm);
    font-size: 0.9375rem;
}

.breadcrumb li::after {
    content: '/';
    opacity: 0.5;
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a:hover {
    color: #FFFFFF;
}

/* ================================
   FAQ Accordion
   ================================ */
.faq-item {
    background: var(--jb-white);
    border-radius: var(--jb-border-radius);
    margin-bottom: var(--jb-spacing-md);
    box-shadow: var(--jb-shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--jb-spacing-lg);
    background: transparent;
    border: none;
    text-align: left;
    font-family: var(--jb-font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--jb-gray-800);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--jb-transition);
}

.faq-question:hover {
    background: var(--jb-gray-100);
}

.faq-question i {
    transition: transform var(--jb-transition);
}

.faq-item.active .faq-question {
    background: var(--jb-primary);
    color: var(--jb-white);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--jb-transition);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: var(--jb-spacing-lg);
    color: var(--jb-gray-600);
    line-height: 1.8;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Animate on scroll classes */
.animate-fadeInUp {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

.animate-fadeInLeft {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s ease;
}

.animate-fadeInLeft.animated {
    opacity: 1;
    transform: translateX(0);
}

.animate-fadeInRight {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s ease;
}

.animate-fadeInRight.animated {
    opacity: 1;
    transform: translateX(0);
}

/* Delay classes */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* ================================
   Preloader
   ================================ */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--jb-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--jb-gray-200);
    border-top-color: var(--jb-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

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

.back-to-top:hover {
    background: var(--jb-secondary);
    transform: translateY(-5px);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--jb-spacing-2xl);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .about-images {
        max-width: 500px;
        margin: 0 auto var(--jb-spacing-2xl);
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .header-contact {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --jb-spacing-3xl: 3rem;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom-inner {
        flex-direction: column;
        gap: var(--jb-spacing-md);
        text-align: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}