/* ========================================
   上海兴郑智能机械 - 真空设备专题网站
   基于Logo暖色调的创新设计
   ======================================== */

/* CSS变量 - 基于Logo色系 */
:root {
    /* 主色调 - 暖色系 */
    --primary-orange: #ff6b35;
    --primary-red: #e63946;
    --primary-gold: #f4a261;
    --primary-coral: #ff8c61;
    
    /* 渐变组合 */
    --gradient-warm: linear-gradient(135deg, var(--primary-orange), var(--primary-red));
    --gradient-gold: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
    --gradient-sunset: linear-gradient(180deg, #ff6b35 0%, #e63946 50%, #9b2226 100%);
    
    /* 背景色 */
    --bg-dark: #0d0d0f;
    --bg-card: #16161a;
    --bg-section: #1a1a20;
    --bg-elevated: #1e1e24;
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: #b0b0b8;
    --text-muted: #6b6b75;
    
    /* 功能色 */
    --accent-green: #2ecc71;
    --accent-blue: #3498db;
    
    /* 阴影 */
    --shadow-warm: 0 10px 40px rgba(255, 107, 53, 0.3);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(255, 107, 53, 0.4);
    
    /* 过渡 */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ========================================
   基础重置
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.7;
}

/* ========================================
   动态背景
   ======================================== */
.dynamic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

.bg-gradient-1 {
    background: radial-gradient(ellipse at 30% 20%, rgba(255, 107, 53, 0.15) 0%, transparent 50%);
}

.bg-gradient-2 {
    background: radial-gradient(ellipse at 70% 80%, rgba(230, 57, 70, 0.1) 0%, transparent 50%);
}

.bg-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 107, 53, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(230, 57, 70, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 50% 50%, rgba(244, 162, 97, 0.05) 1px, transparent 1px);
    background-size: 60px 60px, 80px 80px, 40px 40px;
    animation: particlesMove 30s linear infinite;
}

@keyframes particlesMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(-60px); }
}

/* ========================================
   创新导航栏
   ======================================== */
.innovative-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 5%;
    background: rgba(13, 13, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
}

.nav-logo .logo-wrapper {
    display: flex;
    flex-direction: column;
}

.nav-logo .logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
background-clip: text;
    letter-spacing: 2px;
}

.nav-logo .logo-subtext {
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 3px;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 50px;
    transition: var(--transition-smooth);
}

.nav-item:hover,
.nav-item.active {
    color: var(--text-primary);
    background: rgba(255, 107, 53, 0.1);
}

.nav-item.active {
    background: var(--gradient-warm);
}

.nav-icon {
    font-size: 1rem;
}

.nav-text {
    display: none;
}

@media (min-width: 768px) {
    .nav-text {
        display: inline;
    }
    .nav-item {
        padding: 0.75rem 1.5rem;
    }
}

.cta-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    background: var(--gradient-warm);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-warm);
}

.pulse-effect {
    animation: pulseButton 2s infinite;
}

@keyframes pulseButton {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.4); }
    50% { box-shadow: 0 0 0 15px rgba(255, 107, 53, 0); }
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-smooth);
}

@media (max-width: 992px) {
    .nav-menu {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
}

/* ========================================
   英雄区域
   ======================================== */
.hero-section {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding: 8rem 5% 4rem;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    z-index: 1;
}

.hero-badge-wrapper {
    margin-bottom: 1.5rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-orange);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-orange);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
}

.hero-title .highlight {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 2.5rem;
}

.highlight-text {
    color: var(--primary-orange);
    font-weight: 600;
}

/* 创新统计数据 */
.innovative-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    position: relative;
    padding: 1.25rem 1.75rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 107, 53, 0.3);
}

.stat-icon {
    margin-bottom: 0.75rem;
}

.stat-icon i {
    font-size: 1.5rem;
    color: var(--primary-orange);
}

.stat-content {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-orange);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.stat-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-warm);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.stat-card:hover .stat-decoration {
    transform: scaleX(1);
}

/* 行动按钮 */
.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

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

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-warm);
}

.secondary-btn {
    background: transparent;
    border: 2px solid rgba(255, 107, 53, 0.5);
    color: var(--primary-orange);
}

.secondary-btn:hover {
    background: rgba(255, 107, 53, 0.1);
    transform: translateY(-3px);
}

.btn-icon {
    font-size: 1.2rem;
}

.btn-arrow {
    transition: var(--transition-smooth);
}

.action-btn:hover .btn-arrow {
    transform: translateX(5px);
}

/* 英雄视觉区域 */
.hero-visual {
    position: relative;
    height: 500px;
}

.equipment-showcase {
    position: relative;
    width: 100%;
    height: 100%;
}

.equipment-float {
    position: absolute;
    animation: equipmentFloat 6s ease-in-out infinite;
}

.equipment-1 {
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}

.equipment-2 {
    top: 45%;
    right: 10%;
    animation-delay: 2s;
}

@keyframes equipmentFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.equipment-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

.equipment-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.equipment-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    border-radius: 15px;
}

.equipment-icon i {
    font-size: 1.5rem;
    color: white;
}

.equipment-name {
    font-weight: 600;
    color: var(--text-primary);
}

/* 中央动画 */
.equipment-central {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.central-ring {
    position: absolute;
    border: 2px solid transparent;
    border-radius: 50%;
    animation: ringRotate 20s linear infinite;
}

.ring-1 {
    width: 300px;
    height: 300px;
    top: -150px;
    left: -150px;
    border-top-color: var(--primary-orange);
    border-right-color: var(--primary-red);
}

.ring-2 {
    width: 220px;
    height: 220px;
    top: -110px;
    left: -110px;
    border-bottom-color: var(--primary-gold);
    border-left-color: var(--primary-orange);
    animation-duration: 15s;
    animation-direction: reverse;
}

.ring-3 {
    width: 140px;
    height: 140px;
    top: -70px;
    left: -70px;
    border-top-color: var(--primary-red);
    border-right-color: var(--primary-gold);
    animation-duration: 10s;
}

@keyframes ringRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.central-core {
    position: absolute;
    top: -40px;
    left: -40px;
    width: 80px;
    height: 80px;
    background: var(--gradient-warm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: corePulse 3s ease-in-out infinite;
}

.core-icon i {
    font-size: 2rem;
    color: white;
}

@keyframes corePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ========================================
   产品区域通用样式
   ======================================== */
.products-section {
    padding: 6rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.header-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.deco-line {
    width: 60px;
    height: 2px;
    background: var(--gradient-warm);
}

.deco-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-orange);
    border-radius: 50%;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-orange);
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-title .title-wrap {
    display: block;
}

.section-title .highlight {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   真空油炸机产品区域
   ======================================== */
.section-vacuum-fryer {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-section) 100%);
}

.products-showcase {
    margin-bottom: 4rem;
}

/* 英雄产品卡片 */
.product-hero-card {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 3rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-radius: 30px;
    margin-bottom: 3rem;
    overflow: hidden;
}

.hero-card-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-card-content {
    position: relative;
    z-index: 1;
}

.hero-badge-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--gradient-warm);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1.5rem;
}

.hero-card-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.hero-card-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-card-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.hero-card-features .feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hero-card-features .feature-item i {
    color: var(--primary-orange);
}

.hero-card-actions {
    display: flex;
    gap: 1rem;
}

.btn-details {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-warm);
    border: none;
    border-radius: 50px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-details:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-warm);
}

.btn-video {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-video:hover {
    background: var(--primary-orange);
    border-color: var(--primary-orange);
}

.hero-card-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.equipment-model {
    position: relative;
}

.model-tank {
    position: relative;
    width: 200px;
    height: 280px;
    background: linear-gradient(180deg, #2a2a35 0%, #1a1a20 100%);
    border-radius: 20px;
    border: 3px solid rgba(255, 107, 53, 0.3);
    overflow: hidden;
}

.model-tank::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 150px;
    background: linear-gradient(180deg, rgba(255, 107, 53, 0.1) 0%, transparent 100%);
    border-radius: 10px;
}

.model-controls {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
}

.control-dial {
    width: 40px;
    height: 40px;
    background: var(--gradient-warm);
    border-radius: 50%;
}

.control-display {
    width: 60px;
    height: 30px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 5px;
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.product-card {
    position: relative;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 107, 53, 0.3);
    box-shadow: var(--shadow-card);
}

.product-card.featured {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(230, 57, 70, 0.05) 100%);
    border-color: rgba(255, 107, 53, 0.2);
}

.featured-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: var(--gradient-warm);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.featured-badge i {
    font-size: 0.8rem;
}

.card-glow {
    position: absolute;
    top: -100px;
    right: -100px;
    width: 200px;
    height: 200px;
    background: var(--gradient-warm);
    filter: blur(100px);
    opacity: 0.2;
    pointer-events: none;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.card-icon-wrapper {
    width: 60px;
    height: 60px;
    background: var(--gradient-warm);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon i {
    font-size: 1.5rem;
    color: white;
}

.card-tag {
    padding: 0.3rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.card-tag.hot {
    background: rgba(255, 107, 53, 0.2);
    color: var(--primary-orange);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.card-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.spec-item {
    text-align: center;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
}

.spec-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.spec-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-orange);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-price {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.price-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-orange);
}

.card-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 2px solid rgba(255, 107, 53, 0.3);
    border-radius: 50px;
    color: var(--primary-orange);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.card-btn:hover {
    background: var(--gradient-warm);
    border-color: transparent;
    color: white;
}

.card-btn.primary {
    background: var(--gradient-warm);
    border-color: transparent;
    color: white;
}

.card-btn.primary:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-warm);
}

.card-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-warm);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.product-card:hover .card-decoration {
    transform: scaleX(1);
}

/* 技术优势 */
.tech-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.advantage-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

.advantage-item:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 107, 53, 0.2);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    border-radius: 20px;
}

.advantage-icon i {
    font-size: 1.8rem;
    color: white;
}

.advantage-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   真空冻干机产品区域
   ======================================== */
.section-freeze-dryer {
    background: linear-gradient(180deg, var(--bg-section) 0%, var(--bg-dark) 100%);
}

.freeze-dry-showcase {
    margin-bottom: 4rem;
}

.showcase-intro {
    margin-bottom: 3rem;
}

.intro-card {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(46, 204, 113, 0.05) 100%);
    border: 1px solid rgba(52, 152, 219, 0.2);
    border-radius: 24px;
}

.intro-icon {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3498db, #2ecc71);
    border-radius: 24px;
}

.intro-icon i {
    font-size: 2rem;
    color: white;
}

.intro-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.intro-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.freeze-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.freeze-card {
    border-color: rgba(52, 152, 219, 0.1);
}

.freeze-card:hover {
    border-color: rgba(52, 152, 219, 0.3);
}

.freeze-glow {
    background: linear-gradient(135deg, #3498db, #2ecc71);
}

.freeze-wrapper {
    background: linear-gradient(135deg, #3498db, #2ecc71);
}

.freeze-icon {
    background: linear-gradient(135deg, #3498db, #2ecc71);
}

.freeze-badge {
    background: linear-gradient(135deg, #3498db, #2ecc71);
}

.card-badge {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    background: rgba(52, 152, 219, 0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.feature-tag i {
    color: #2ecc71;
    font-size: 0.8rem;
}

.freeze-btn {
    border-color: rgba(52, 152, 219, 0.3);
    color: #3498db;
}

.freeze-btn:hover {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    border-color: transparent;
    color: white;
}

.freeze-btn.primary {
    background: linear-gradient(135deg, #3498db, #2ecc71);
    border-color: transparent;
    color: white;
}

/* 冻干优势 */
.freeze-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.advantage-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid rgba(52, 152, 219, 0.1);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

.advantage-card:hover {
    transform: translateX(10px);
    border-color: rgba(52, 152, 219, 0.3);
}

.advantage-visual {
    position: relative;
}

.visual-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3498db, #2ecc71);
    border-radius: 18px;
}

.visual-icon i {
    font-size: 1.5rem;
    color: white;
}

.advantage-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.advantage-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========================================
   解决方案区域
   ======================================== */
.solutions-section {
    padding: 6rem 5%;
    background: var(--bg-section);
}

.solutions-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-card {
    position: relative;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.solution-card:hover {
    transform: translateY(-10px);
}

.solution-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.solution-card:hover .solution-bg {
    opacity: 1;
}

.solution-content {
    position: relative;
    z-index: 1;
}

.solution-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    border-radius: 20px;
    margin-bottom: 1.5rem;
}

.solution-icon i {
    font-size: 1.8rem;
    color: white;
}

.solution-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.solution-content > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.solution-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.solution-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.solution-features li::before {
    content: '✓';
    color: var(--primary-orange);
    font-weight: bold;
}

.solution-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-orange);
    font-weight: 600;
    font-size: 0.9rem;
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.solution-btn:hover {
    gap: 1rem;
}

/* ========================================
   关于我们区域
   ======================================== */
.about-section {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.about-container {
    background: var(--bg-card);
    border-radius: 30px;
    padding: 3rem;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.about-text h2 .highlight {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-lead {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.about-text > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.feature-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    border-radius: 15px;
    margin-bottom: 0.75rem;
}

.feature-icon i {
    font-size: 1.2rem;
    color: white;
}

.feature-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.feature-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 时间线 */
.timeline-wrapper {
    padding: 2rem;
    background: var(--bg-dark);
    border-radius: 20px;
}

.timeline-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-warm);
}

.timeline-item {
    position: relative;
    padding: 1rem 0;
    padding-left: 1.5rem;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--bg-card);
    border: 2px solid var(--primary-orange);
    border-radius: 50%;
}

.timeline-item.active .timeline-marker {
    background: var(--primary-orange);
    box-shadow: 0 0 20px var(--primary-orange);
}

.timeline-year {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-orange);
    margin-bottom: 0.25rem;
}

.timeline-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   社交媒体区域
   ======================================== */
.social-section {
    padding: 6rem 5%;
    background: var(--bg-section);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto 3rem;
}

.social-card {
    position: relative;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 24px;
    text-decoration: none;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.social-card:hover {
    transform: translateY(-5px);
}

.social-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    transition: var(--transition-smooth);
}

.social-card.wechat .social-bg { background: #07c160; }
.social-card.weibo .social-bg { background: #e6162d; }
.social-card.tiktok .social-bg { background: #000; }
.social-card.redbook .social-bg { background: #fe2c55; }

.social-card:hover .social-bg {
    opacity: 0.2;
}

.social-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.social-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    font-size: 1.5rem;
}

.social-card.wechat .social-icon { background: rgba(7, 193, 96, 0.2); color: #07c160; }
.social-card.weibo .social-icon { background: rgba(230, 22, 45, 0.2); color: #e6162d; }
.social-card.tiktok .social-icon { background: rgba(255, 255, 255, 0.1); color: #fff; }
.social-card.redbook .social-icon { background: rgba(254, 44, 85, 0.2); color: #fe2c55; }

.social-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.social-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.social-handle {
    font-size: 0.8rem;
    color: var(--primary-orange);
}

/* 联系卡片 */
.contact-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warm);
    border-radius: 15px;
}

.contact-icon i {
    font-size: 1.2rem;
    color: white;
}

.contact-info h4 {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.contact-info p {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 4rem 5% 2rem;
    background: var(--bg-card);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand .footer-logo {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.footer-logo .logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo .logo-subtext {
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-link:hover {
    background: var(--gradient-warm);
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.footer-column a:hover {
    color: var(--primary-orange);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        max-width: 100%;
    }
    
    .innovative-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .product-hero-card {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .innovative-stats {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .contact-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
}