/* ========================================
   海南洪迈国际贸易有限公司
   HAINAN XIANGHENG INTERNATIONAL TRADE CO., LTD.
   大宗商品贸易官方网站样式表
   ======================================== */

/* CSS变量定义 */
:root {
    /* 主色调 - 蓝色系 */
    --primary-blue: #0066cc;
    --primary-cyan: #00d4ff;
    --primary-dark: #003366;
    --secondary-blue: #0099cc;
    
    /* 渐变色彩 */
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00d4ff 100%);
    --gradient-ocean: linear-gradient(180deg, #001a33 0%, #003366 50%, #006699 100%);
    --gradient-hero: linear-gradient(135deg, #001829 0%, #003354 50%, #004d7a 100%);
    --gradient-card: linear-gradient(135deg, rgba(0, 153, 204, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    --gradient-text: linear-gradient(90deg, #00d4ff, #0066cc);
    
    /* 产品特定颜色 */
    --copper-color: #b87333;
    --copper-gradient: linear-gradient(135deg, #b87333 0%, #da965c 100%);
    --russian-blue: #1e3a5f;
    --russian-gradient: linear-gradient(135deg, #1e3a5f 0%, #4169e1 100%);
    --turkish-red: #e30a17;
    --turkish-gradient: linear-gradient(135deg, #e30a17 0%, #ff6b6b 100%);
    
    /* 科技感色彩 */
    --tech-blue: #00d4ff;
    --tech-green: #00ff88;
    --tech-purple: #8866ff;
    --dark-bg: #0a1628;
    --darker-bg: #051220;
    --card-bg: rgba(10, 30, 60, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.05);
    
    /* 文字色彩 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 阴影与效果 */
    --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.5);
    --glow-copper: 0 0 20px rgba(184, 115, 51, 0.5);
    --glow-blue: 0 0 30px rgba(0, 102, 204, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.4);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-primary: 'Orbitron', 'Noto Sans SC', sans-serif;
    --font-secondary: 'Noto Sans SC', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   导航栏样式 - 不固定，随页面滚动
   ======================================== */
.navbar {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    z-index: 1000;
    padding: 30px 0;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(5, 18, 32, 0.9);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    position: relative;
}

.logo-icon.small {
    width: 40px;
    height: 40px;
}

.globe-icon {
    width: 100%;
    height: 100%;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

.company-name {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.company-slogan {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 35px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 10px 0;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--tech-cyan);
}

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

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

.lang-btn {
    font-size: 0.85rem;
    color: var(--text-muted);
    cursor: pointer;
    background: none;
    border: none;
    transition: var(--transition-fast);
    font-family: inherit;
}

.lang-btn.active,
.lang-btn:hover {
    color: var(--tech-cyan);
}

.lang-divider {
    color: var(--text-muted);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ========================================
   语言切换按钮样式 - 右上角小巧设计
   ======================================== */
.version-switch {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background: rgba(5, 18, 32, 0.85);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 25px;
    backdrop-filter: blur(10px);
    z-index: 10001;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.version-switch:hover {
    border-color: rgba(0, 212, 255, 0.6);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.version-switch .current {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--tech-cyan);
    padding: 4px 10px;
    background: rgba(0, 212, 255, 0.15);
    border-radius: 15px;
}

.version-switch .divider {
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.8rem;
}

.version-switch a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 15px;
    transition: all 0.2s ease;
}

.version-switch a:hover {
    color: var(--tech-cyan);
    background: rgba(0, 212, 255, 0.1);
}

.navbar {
    top: 0;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .version-switch {
        top: 15px;
        right: 15px;
        padding: 6px 12px;
        transform: scale(0.9);
    }
    
    .version-switch .current,
    .version-switch a {
        font-size: 0.75rem;
        padding: 3px 8px;
    }
}

/* ========================================
   首页横幅样式
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* 海洋波浪效果 */
.ocean {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%2300d4ff' fill-opacity='0.2' d='M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E") repeat-x;
    background-size: 50% 100%;
    animation: wave 10s linear infinite;
}

.wave:nth-child(2) {
    opacity: 0.5;
    animation: wave 7s linear infinite reverse;
    bottom: 10px;
}

.wave:nth-child(3) {
    opacity: 0.3;
    animation: wave 12s linear infinite;
    bottom: 20px;
}

@keyframes wave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* 粒子效果 */
.particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--tech-cyan);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* 网格覆盖层 */
.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* 主要内容区域 */
.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 0 20px;
    max-width: 1200px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 25px;
    background: var(--glass-bg);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease;
}

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

.hero-badge span:last-child {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.hero-title {
    font-family: var(--font-primary);
    margin-bottom: 25px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.title-line {
    display: block;
    font-size: 3rem;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: 8px;
}

.title-highlight {
    display: block;
    font-size: 4.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-top: 10px;
    letter-spacing: 5px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 35px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    z-index: -1;
    transition: var(--transition-normal);
}

.btn-primary {
    color: white;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--tech-cyan);
    border: 2px solid var(--tech-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: var(--glow-cyan);
    transform: translateY(-3px);
}

/* 统计数字 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

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

.stat-number {
    font-family: var(--font-primary);
    font-size: 3rem;
    font-weight: 700;
    color: var(--tech-cyan);
    display: inline;
}

.stat-suffix {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    color: var(--tech-cyan);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 5px;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: fadeIn 1s ease 1s both;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--tech-cyan);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.3; transform: translateX(-50%) translateY(10px); }
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

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

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

/* ========================================
   关于我们样式
   ======================================== */
.about {
    position: relative;
    padding: 150px 0;
    background: var(--darker-bg);
    overflow: hidden;
}

.section-bg-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 102, 204, 0.05) 0%, transparent 50%);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header.light {
    color: var(--text-primary);
}

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--tech-cyan);
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-primary);
    font-size: 2.8rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.section-title .highlight {
    background: var(--gradient-text);
    -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;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

/* 地球动画 */
.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 500px;
    height: 500px;
    margin: 0 auto;
}

.earth-animation {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.earth {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: 
        radial-gradient(circle at 30% 30%, rgba(0, 150, 200, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(0, 100, 180, 0.5) 0%, transparent 40%),
        linear-gradient(135deg, #004080 0%, #006699 50%, #003366 100%);
    box-shadow: 
        inset -30px -30px 60px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(0, 212, 255, 0.3);
    position: relative;
    animation: earthRotate 30s linear infinite;
}

@keyframes earthRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.continent {
    position: absolute;
    background: rgba(0, 212, 255, 0.3);
    border-radius: 50%;
}

.continent.c1 {
    width: 80px;
    height: 60px;
    top: 60px;
    left: 50px;
    border-radius: 40%;
}

.continent.c2 {
    width: 100px;
    height: 80px;
    top: 120px;
    left: 150px;
    border-radius: 30%;
}

.continent.c3 {
    width: 60px;
    height: 50px;
    bottom: 80px;
    left: 80px;
    border-radius: 50%;
}

.satellite {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--tech-cyan);
    border-radius: 50%;
    box-shadow: var(--glow-cyan);
    animation: satellite 8s linear infinite;
}

.satellite::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--tech-cyan), transparent);
    top: 50%;
    transform: translateY(-50%);
    right: 100%;
}

.satellite.s1 {
    top: -30px;
    right: 50px;
}

.satellite.s2 {
    bottom: -30px;
    left: 50px;
    animation-delay: 4s;
    animation-direction: reverse;
}

@keyframes satellite {
    0% { transform: rotate(0deg) translateX(180px); }
    100% { transform: rotate(360deg) translateX(180px); }
}

.floating-card {
    position: absolute;
    padding: 15px 25px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.3rem;
    color: var(--tech-cyan);
}

.floating-card span {
    font-size: 0.9rem;
    font-weight: 500;
}

.floating-card.card-1 {
    top: 20%;
    left: -20px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    bottom: 20%;
    right: -20px;
    animation-delay: 1.5s;
}

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

/* 关于我们文本内容 */
.about-text h3 {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--tech-cyan);
}

.about-intro p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 15px;
    transition: var(--transition-normal);
}

.feature-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
}

.feature-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    flex-shrink: 0;
}

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

.feature-content h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 证书展示 */
.certificates {
    display: flex;
    gap: 20px;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.cert-item i {
    color: var(--tech-cyan);
}

/* ========================================
   核心产品样式
   ======================================== */
.products {
    position: relative;
    padding: 150px 0;
    background: linear-gradient(180deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

.product-section {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 120px;
    padding: 60px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 30px;
    position: relative;
    overflow: hidden;
}

.product-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.product-section.reverse {
    direction: rtl;
}

.product-section.reverse > * {
    direction: ltr;
}

.product-section:last-child {
    margin-bottom: 0;
}

.product-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--tech-cyan);
    margin-bottom: 25px;
}

.product-title {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 35px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.product-feature {
    padding: 25px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--tech-cyan);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature-list li {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.feature-list strong {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.feature-list li span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.application-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.application-tags li {
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 产品视觉展示 */
.product-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-card {
    width: 100%;
    max-width: 350px;
    padding: 40px;
    background: linear-gradient(135deg, rgba(0, 153, 204, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 25px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    animation: rotate 15s linear infinite;
}

.copper-icon,
.aluminum-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.copper-icon {
    background: var(--copper-gradient);
    box-shadow: var(--glow-copper);
}

.copper-icon i {
    font-size: 3rem;
    color: white;
}

.aluminum-icon.russian {
    background: var(--russian-gradient);
    box-shadow: 0 0 30px rgba(30, 58, 95, 0.5);
}

.aluminum-icon.turkish {
    background: var(--turkish-gradient);
    box-shadow: 0 0 30px rgba(227, 10, 23, 0.5);
}

.aluminum-icon i {
    font-size: 3rem;
    color: white;
}

.origin-info {
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.origin-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.origin-value {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.spec-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    position: relative;
    z-index: 1;
}

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

.spec-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.spec-value {
    font-family: var(--font-primary);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--tech-cyan);
}

/* ========================================
   物流运输样式
   ======================================== */
.logistics {
    position: relative;
    padding: 150px 0;
    background: var(--darker-bg);
}

.logistics-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
}

.logistics-route h3,
.logistics-features h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.route-card {
    padding: 25px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 20px;
    margin-bottom: 20px;
    transition: var(--transition-normal);
}

.route-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
}

.route-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-bottom: 15px;
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 1.1rem;
    font-weight: 600;
}

.route-header.copper-route {
    color: var(--copper-color);
}

.route-header.russian-route {
    color: #4169e1;
}

.route-header.turkish-route {
    color: var(--turkish-red);
}

.route-header i {
    font-size: 1.3rem;
}

.route-details {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.route-point {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.route-point i {
    font-size: 1.2rem;
    color: var(--tech-cyan);
}

.point-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.point-value {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.route-arrow {
    color: var(--text-muted);
}

.route-spec {
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-tag {
    display: inline-block;
    padding: 6px 15px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--tech-cyan);
}

/* 物流优势 */
.advantage-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.advantage-item {
    padding: 25px;
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 20px;
    text-align: center;
    transition: var(--transition-normal);
}

.advantage-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 15px;
}

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

.advantage-item h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================
   合作伙伴样式
   ======================================== */
.partners {
    position: relative;
    padding: 150px 0;
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
}

.partner-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.partner-category {
    padding: 40px 30px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 25px;
    text-align: center;
    transition: var(--transition-normal);
}

.partner-category:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-10px);
}

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.category-icon.copper {
    background: var(--copper-gradient);
    box-shadow: var(--glow-copper);
}

.category-icon.russia {
    background: var(--russian-gradient);
    box-shadow: 0 0 30px rgba(30, 58, 95, 0.5);
}

.category-icon.turkey {
    background: var(--turkish-gradient);
    box-shadow: 0 0 30px rgba(227, 10, 23, 0.5);
}

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

.partner-category h3 {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.partner-logos {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.partner-logo {
    width: 120px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    transition: var(--transition-normal);
}

.partner-logo:hover {
    background: rgba(0, 212, 255, 0.1);
}

.logo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.logo-placeholder span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-placeholder small {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 航运合作伙伴 */
.shipping-partners {
    padding: 50px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 25px;
    text-align: center;
}

.shipping-partners h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    margin-bottom: 35px;
    color: var(--text-primary);
}

.shipping-logos {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.shipping-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    transition: var(--transition-normal);
}

.shipping-logo:hover {
    background: rgba(0, 212, 255, 0.1);
}

.shipping-logo i {
    font-size: 2rem;
    color: var(--tech-cyan);
}

.shipping-logo span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========================================
   联系我们样式
   ======================================== */
.contact {
    padding: 150px 0;
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 15px;
    transition: var(--transition-normal);
}

.contact-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    flex-shrink: 0;
}

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

.contact-text h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.contact-text p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: translateY(-5px);
}

/* 联系表单 */
.contact-form-wrapper {
    padding: 40px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 25px;
    backdrop-filter: blur(20px);
}

.contact-form h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

.form-group {
    position: relative;
}

.form-group.full-width {
    margin-bottom: 30px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px 0;
    font-size: 1rem;
    color: var(--text-primary);
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    outline: none;
    transition: var(--transition-normal);
    font-family: var(--font-secondary);
}

.form-group textarea {
    resize: none;
    min-height: 120px;
}

.form-group label {
    position: absolute;
    top: 15px;
    left: 0;
    font-size: 1rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition-normal);
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label,
.form-group select:focus ~ label {
    top: -10px;
    font-size: 0.8rem;
    color: var(--tech-cyan);
}

.focus-border {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.form-group input:focus ~ .focus-border,
.form-group textarea:focus ~ .focus-border,
.form-group select:focus ~ .focus-border {
    width: 100%;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23ffffff' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
}

.form-group select option {
    background: var(--dark-bg);
    color: var(--text-primary);
}

.submit-btn {
    width: 100%;
    padding: 18px;
    font-size: 1.1rem;
}

/* ========================================
   页脚样式
   ======================================== */
.footer {
    background: var(--darker-bg);
}

.footer-top {
    padding: 80px 0 50px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo span {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-about p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links h4,
.footer-newsletter h4 {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-links a {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.footer-links a:hover {
    color: var(--tech-cyan);
    padding-left: 5px;
}

.footer-newsletter p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 20px;
    background: var(--gradient-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-normal);
}

.newsletter-form input::placeholder {
    color: var(--text-muted);
}

.newsletter-form input:focus {
    border-color: var(--tech-cyan);
}

.newsletter-form button {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-normal);
}

.newsletter-form button:hover {
    transform: scale(1.1);
    box-shadow: var(--glow-cyan);
}

.newsletter-form button i {
    color: white;
    font-size: 1rem;
}

.footer-bottom {
    padding: 30px 0;
}

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

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

.footer-legal {
    display: flex;
    gap: 30px;
}

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

.footer-legal a:hover {
    color: var(--tech-cyan);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .product-section {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .product-section.reverse {
        direction: ltr;
    }
    
    .partner-categories {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .logistics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .nav-language {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .title-line {
        font-size: 2.2rem;
    }
    
    .title-highlight {
        font-size: 3.2rem;
    }
    
    .hero-stats {
        gap: 30px;
        flex-wrap: wrap;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-image {
        order: -1;
    }
    
    .image-wrapper {
        width: 350px;
        height: 350px;
    }
    
    .earth {
        width: 220px;
        height: 220px;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .advantage-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .title-line {
        font-size: 1.8rem;
    }
    
    .title-highlight {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .product-section {
        padding: 40px 25px;
    }
    
    .product-title {
        font-size: 1.8rem;
    }
    
    .partner-categories {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .shipping-logos {
        flex-wrap: wrap;
    }
    
    .certificates {
        flex-direction: column;
    }
    
    .route-details {
        flex-direction: column;
        gap: 15px;
    }
    
    .route-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .hero-content {
        padding: 0 15px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
    
    .image-wrapper {
        width: 280px;
        height: 280px;
    }
    
    .earth {
        width: 180px;
        height: 180px;
    }
    
    .product-card {
        padding: 30px 20px;
    }
    
    .copper-icon,
    .aluminum-icon {
        width: 100px;
        height: 100px;
    }
    
    .copper-icon i,
    .aluminum-icon i {
        font-size: 2.5rem;
    }
}