/* ===================================
   高端黑金配色 - 全局样式
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 黑金配色系统 */
    --black-deep: #000000;
    --black-rich: #0a0a0a;
    --black-surface: #111111;
    --black-elevated: #1a1a1a;
    --black-card: #141414;
    
    /* 金色系统 */
    --gold-primary: #D4AF37;
    --gold-bright: #FFD700;
    --gold-rich: #E5C158;
    --gold-dark: #B8860B;
    --gold-muted: #9A7B4F;
    
    /* 文字颜色 */
    --text-primary: #FFFFFF;
    --text-secondary: #B8B8B8;
    --text-muted: #808080;
    
    /* 向后兼容别名（产品页使用） */
    --primary-color: var(--gold-primary);
    --accent-color: var(--gold-bright);
    --secondary-color: var(--gold-dark);
    --bg-light: var(--black-surface);
    --text-light: var(--text-secondary);
    
    /* 金色渐变 */
    --gold-gradient: linear-gradient(135deg, #D4AF37 0%, #FFD700 50%, #B8860B 100%);
    --gold-subtle: linear-gradient(135deg, rgba(212,175,55,0.1) 0%, rgba(255,215,0,0.05) 100%);
    
    /* 边框与分隔 */
    --gold-border: rgba(212, 175, 55, 0.3);
    --gold-border-light: rgba(212, 175, 55, 0.15);
    --gold-glow: 0 0 30px rgba(212, 175, 55, 0.3);
    --border-color: rgba(212, 175, 55, 0.3);
    
    /* 间距系统 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--black-deep);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===================================
   滚动条美化
   =================================== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--black-rich);
}

::-webkit-scrollbar-thumb {
    background: var(--gold-dark);
    border-radius: 3px;
}

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

/* ===================================
   布局容器
   =================================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===================================
   导航栏
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gold-border-light);
    transition: all 0.4s ease;
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--gold-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--black-deep);
    box-shadow: var(--gold-glow);
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 2px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航菜单 */
.nav-tabs {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
}

.nav-tabs .tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 0.5px;
}

.nav-tabs .tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--gold-gradient);
    transition: transform 0.3s ease;
}

.nav-tabs .tab:hover {
    color: var(--text-primary);
}

.nav-tabs .tab:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-tabs .tab.active {
    color: var(--gold-primary);
}

.nav-tabs .tab.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* CTA按钮 */
.nav-cta {
    padding: 0.7rem 1.8rem;
    background: transparent;
    border: 1px solid var(--gold-primary);
    color: var(--gold-primary);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.nav-cta:hover {
    background: var(--gold-primary);
    color: var(--black-deep);
    box-shadow: 0 0 25px rgba(212, 175, 55, 0.4);
}

/* ===================================
   主内容区
   =================================== */
main {
    padding-top: 80px;
}

.tab-content {
    display: none;
    animation: fadeInUp 0.6s ease;
}

.tab-content.active {
    display: block;
}

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

/* ===================================
   Hero 英雄区域
   =================================== */
.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* 背景装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: var(--gold-subtle);
    border: 1px solid var(--gold-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--gold-primary);
    margin-bottom: var(--space-lg);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--gold-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -1px;
}

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

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.btn-primary {
    padding: 1rem 2.5rem;
    background: var(--gold-gradient);
    border: none;
    color: var(--black-deep);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    padding: 1rem 2.5rem;
    background: transparent;
    border: 1px solid var(--gold-border);
    color: var(--gold-primary);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-secondary:hover {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold-primary);
}

/* 统计数字 */
.hero-stats {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gold-border-light);
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Hero 视觉区域 */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.hero-image {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(145deg, var(--black-elevated), var(--black-card));
    border-radius: var(--radius-xl);
    border: 1px solid var(--gold-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gold-subtle);
    opacity: 0.5;
}

.hero-image-icon {
    font-size: 6rem;
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.hero-image-text {
    font-size: 1.2rem;
    color: var(--gold-primary);
    font-weight: 500;
    position: relative;
    z-index: 1;
    letter-spacing: 2px;
}

/* 装饰元素 */
.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 20px;
    left: 20px;
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-xl);
    z-index: -1;
}

/* ===================================
   特色板块
   =================================== */
.features-section {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-label {
    font-size: 0.9rem;
    color: var(--gold-primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.5px;
}

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

/* 特色卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gold-gradient);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--gold-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--gold-glow);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: var(--gold-subtle);
    border: 1px solid var(--gold-border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    background: var(--gold-gradient);
    transform: scale(1.1);
}

.feature-card:hover .feature-icon span {
    filter: brightness(0);
}

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

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===================================
   产品展示区
   =================================== */
.products-section {
    padding: var(--space-2xl) 0;
    background: var(--black-surface);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.product-card {
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--gold-border);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}

.product-image {
    height: 220px;
    background: linear-gradient(135deg, var(--black-elevated), var(--black-rich));
    border-bottom: 1px solid var(--gold-border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, rgba(212, 175, 55, 0.1), transparent);
}

.product-image-icon {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
}

.product-image-text {
    font-size: 1rem;
    color: var(--gold-primary);
    font-weight: 500;
}

.product-info {
    padding: var(--space-lg);
}

.product-tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--gold-subtle);
    border: 1px solid var(--gold-border-light);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--gold-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: 1px;
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.product-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.product-features {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.product-features li {
    font-size: 0.9rem;
    color: var(--text-muted);
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--gold-border-light);
}

.product-features li:last-child {
    border-bottom: none;
}

.detail-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.8rem 1.5rem;
    background: transparent;
    border: 1px solid var(--gold-border);
    color: var(--gold-primary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.3s ease;
}

.detail-button:hover {
    background: var(--gold-primary);
    color: var(--black-deep);
    border-color: var(--gold-primary);
}

/* ===================================
   服务方案
   =================================== */
.services-section {
    padding: var(--space-2xl) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.service-card {
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s ease;
    position: relative;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--gold-border);
}

.service-card.featured {
    border-color: var(--gold-primary);
    box-shadow: var(--gold-glow);
}

.service-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gold-gradient);
}

.featured-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: 0.4rem 1rem;
    background: var(--gold-gradient);
    color: var(--black-deep);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50px;
    letter-spacing: 1px;
    z-index: 10;
}

.service-header {
    padding: var(--space-xl);
    background: var(--black-elevated);
    text-align: center;
    border-bottom: 1px solid var(--gold-border-light);
}

.service-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.price-tag {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-tag span {
    font-size: 1rem;
    font-weight: 400;
}

.service-body {
    padding: var(--space-xl);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.8rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--gold-border-light);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.feature-list li::before {
    content: '✓';
    color: var(--gold-primary);
    font-weight: 600;
}

.feature-list li:last-child {
    border-bottom: none;
}

.service-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: var(--space-lg) 0;
    font-style: italic;
}

.service-cta {
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: 1px solid var(--gold-border);
    color: var(--gold-primary);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.service-cta:hover {
    background: var(--gold-primary);
    color: var(--black-deep);
}

.service-card.featured .service-cta {
    background: var(--gold-gradient);
    color: var(--black-deep);
    border: none;
}

.service-card.featured .service-cta:hover {
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
}

/* ===================================
   关于我们
   =================================== */
.about-section {
    padding: var(--space-2xl) 0;
    background: var(--black-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

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

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-mission {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--black-card);
    border: 1px solid var(--gold-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.about-mission p {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--gold-primary);
    font-style: italic;
}

.about-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.about-visual-item {
    aspect-ratio: 1;
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.about-visual-item:hover {
    border-color: var(--gold-border);
    transform: scale(1.02);
}

.about-visual-item span {
    font-size: 3rem;
    margin-bottom: var(--space-xs);
}

.about-visual-item small {
    color: var(--gold-primary);
    font-size: 0.85rem;
}

/* 价值观 */
.values-section {
    padding: var(--space-2xl) 0;
}

.values-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.value-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.value-item:hover {
    border-color: var(--gold-border);
    transform: translateX(10px);
}

.value-dot {
    width: 12px;
    height: 12px;
    background: var(--gold-gradient);
    border-radius: 50%;
    margin-top: 0.4rem;
    flex-shrink: 0;
}

.value-item strong {
    display: block;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.value-item p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* 数据统计 */
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--gold-border-light);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ===================================
   联系方式
   =================================== */
.contact-section {
    padding: var(--space-2xl) 0;
    background: var(--black-surface);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--gold-primary);
    margin-bottom: var(--space-lg);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gold-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

.contact-form {
    background: var(--black-card);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    background: var(--black-elevated);
    border: 1px solid var(--gold-border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--gold-gradient);
    border: none;
    color: var(--black-deep);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.submit-btn:hover {
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.4);
    transform: translateY(-2px);
}

/* ===================================
   页脚
   =================================== */
.footer {
    background: var(--black-rich);
    border-top: 1px solid var(--gold-border-light);
    padding: var(--space-2xl) 0 var(--space-lg);
}

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

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

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-column h4 {
    font-size: 1rem;
    color: var(--gold-primary);
    margin-bottom: var(--space-md);
    letter-spacing: 1px;
}

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

.footer-column li {
    margin-bottom: 0.75rem;
}

.footer-column a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--gold-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gold-border-light);
}

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

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--gold-primary);
}

/* ===================================
   响应式设计
   =================================== */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-image-wrapper {
        max-width: 350px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        order: -1;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
        height: auto;
        padding: 1rem;
        gap: 1rem;
    }
    
    .nav-tabs {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-tabs .tab {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .nav-cta {
        display: none;
    }
    
    main {
        padding-top: 120px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .products-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .values-list {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* ===================================
   动画增强
   =================================== */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        var(--gold-primary) 0%,
        var(--gold-bright) 50%,
        var(--gold-primary) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s ease infinite;
}

/* 入场动画 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}
/* 手机自适应 */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column !important;
        text-align: center !important;
    }
    
    .hero-text {
        text-align: center !important;
        padding: 20px !important;
    }
    
    .hero-title {
        font-size: 28px !important;
        text-align: center !important;
    }
    
    .hero-description {
        text-align: center !important;
        padding: 0 15px !important;
    }
    
    .hero-actions {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        gap: 10px !important;
    }
    
    .hero-actions button {
        width: 200px !important;
        margin: 5px auto !important;
    }
    
    .hero-stats {
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
        gap: 30px !important;
    }
    
    .stat {
        text-align: center !important;
    }
    
    .hero-visual {
        margin-top: 30px !important;
        text-align: center !important;
    }
    
    .hero-image img {
        max-width: 80% !important;
        height: auto !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px !important;
    }
    
    .hero-actions button {
        width: 180px !important;
    }
}