/* ============================================
   太铭科技官网 - 全局样式
   说明：此文件包含网站的所有CSS样式
   修改时请注意保持类名一致性
   ============================================ */

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

@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@200;300;400;500;600;700;800&family=Chakra+Petch:wght@300;400;500;600;700&display=swap');

:root {
    /* 品牌色彩 - 修改此处可全局调整主题色 */
    --gold: #d0a85c;
    --gold-light: #e8c87a;
    --gold-dark: #b08d4a;
    --black: #000000;
    --dark: #111111;
    --dark-gray: #222222;
    --medium-gray: #3f3f3f;
    --light-gray: #cccccc;
    --white: #ffffff;
    
    /* 字体 */
    --font-display: 'Chakra Petch', sans-serif;
    --font-body: 'Barlow', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--black);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ---- 滚动条样式 ---- */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: 4px;
}

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

/* ---- 通用工具类 ---- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-gold { color: var(--gold); }
.text-white { color: var(--white); }
.text-gray { color: var(--light-gray); }
.bg-black { background-color: var(--black); }
.bg-dark { background-color: var(--dark); }

/* 渐变文字 */
.text-gradient {
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 50%, var(--gold-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 网格背景 */
.grid-pattern {
    background-image: 
        linear-gradient(rgba(208, 168, 92, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(208, 168, 92, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* 金色发光效果 */
.glow-gold {
    box-shadow: 0 0 20px rgba(208, 168, 92, 0.3);
}

/* ---- 按钮样式 ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--gold-light);
    box-shadow: 0 0 20px rgba(208, 168, 92, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--gold);
    border: 1px solid rgba(208, 168, 92, 0.5);
}

.btn-outline:hover {
    background-color: rgba(208, 168, 92, 0.1);
    border-color: var(--gold);
}

.btn-small {
    padding: 8px 16px;
    font-size: 12px;
}

/* ---- 导航栏 ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(208, 168, 92, 0.2);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: rgba(208, 168, 92, 0.1);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--gold);
}

.logo-image {
    height: 42px;
    width: auto;
    object-fit: contain;
}

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

.logo-name {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
}

.logo-sub {
    font-size: 10px;
    color: var(--gold);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-menu a {
    display: block;
    padding: 8px 16px;
    color: var(--light-gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--gold);
    background-color: rgba(208, 168, 92, 0.1);
}

.nav-cta {
    display: block;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
}

/* ---- 移动端菜单 ---- */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.98);
    border-bottom: 1px solid rgba(208, 168, 92, 0.2);
    padding: 20px;
    z-index: 999;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 12px 16px;
    color: var(--light-gray);
    text-decoration: none;
    font-size: 16px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.mobile-menu a:hover {
    color: var(--gold);
    background-color: rgba(208, 168, 92, 0.1);
}

/* ---- Hero区域 ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,1) 100%);
    z-index: 1;
}

.hero-grid {
    position: absolute;
    inset: 0;
    grid-pattern;
    opacity: 0.5;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 0 20px;
    max-width: 900px;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    margin-bottom: 24px;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--gold);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 10vw, 80px);
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(18px, 4vw, 28px);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 12px;
}

.hero-desc {
    font-size: 16px;
    color: var(--light-gray);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 700px;
    margin: 0 auto;
}

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

.stat-value {
    font-family: var(--font-display);
    font-size: clamp(24px, 5vw, 36px);
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
}

.stat-label {
    font-size: 12px;
    color: var(--light-gray);
    margin-top: 8px;
}

/* ---- 区块通用样式 ---- */
.section {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    margin-bottom: 16px;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--gold);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 20px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 6vw, 48px);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--light-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ---- 关于我们区块 ---- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid rgba(208, 168, 92, 0.2);
}

.about-image::before,
.about-image::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 60px;
    border-color: rgba(208, 168, 92, 0.3);
    border-style: solid;
}

.about-image::before {
    top: -15px;
    left: -15px;
    border-width: 2px 0 0 2px;
}

.about-image::after {
    bottom: -15px;
    right: -15px;
    border-width: 0 2px 2px 0;
}

.about-content h3 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--light-gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--light-gray);
    font-size: 14px;
}

.about-feature::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--gold);
    border-radius: 50%;
}

/* ---- 统计数据 ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 60px;
}

.stat-card {
    padding: 30px 20px;
    text-align: center;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(34,34,34,0.5) 0%, rgba(0,0,0,0.5) 100%);
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: rgba(208, 168, 92, 0.5);
}

.stat-card-value {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
}

.stat-card-suffix {
    font-size: 20px;
}

.stat-card-label {
    font-size: 13px;
    color: var(--light-gray);
    margin-top: 8px;
}

/* ---- 资质认证 ---- */
.qualifications {
    margin-top: 60px;
}

.qualifications h3 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
}

.qual-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.qual-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
    transition: all 0.3s ease;
}

.qual-item:hover {
    border-color: rgba(208, 168, 92, 0.4);
}

.qual-icon {
    width: 44px;
    height: 44px;
    background-color: rgba(208, 168, 92, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 20px;
    flex-shrink: 0;
}

.qual-content h4 {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.qual-content p {
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 4px;
}

.qual-year {
    font-size: 12px;
    color: var(--gold);
}

/* ---- 团队区块 ---- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    padding: 30px 20px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
    text-align: center;
    transition: all 0.3s ease;
}

.team-card:hover {
    border-color: rgba(208, 168, 92, 0.5);
}

.team-avatar {
    width: 90px;
    height: 90px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(208, 168, 92, 0.2) 0%, rgba(208, 168, 92, 0.05) 100%);
    border: 2px solid rgba(208, 168, 92, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: rgba(208, 168, 92, 0.6);
}

.team-name {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 4px;
}

.team-title {
    font-size: 13px;
    color: var(--gold);
    margin-bottom: 8px;
}

.team-creds {
    font-size: 12px;
    color: var(--light-gray);
    margin-bottom: 16px;
}

.team-expertise {
    text-align: left;
}

.team-expertise-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 12px;
    color: var(--light-gray);
    margin-bottom: 6px;
}

.team-expertise-item::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: rgba(208, 168, 92, 0.6);
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.team-skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.team-skill {
    padding: 8px 20px;
    font-size: 13px;
    color: var(--gold);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 20px;
    background-color: rgba(208, 168, 92, 0.05);
}

/* ---- 解决方案区块 ---- */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    overflow: hidden;
    background-color: rgba(34, 34, 34, 0.5);
    transition: all 0.3s ease;
}

.solution-card:hover {
    border-color: rgba(208, 168, 92, 0.5);
    transform: translateY(-5px);
}

.solution-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.solution-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(34,34,34,1) 0%, rgba(34,34,34,0.5) 50%, transparent 100%);
}

.solution-icon {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 50px;
    height: 50px;
    background-color: rgba(208, 168, 92, 0.2);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 24px;
    z-index: 10;
}

.solution-content {
    padding: 24px;
}

.solution-subtitle {
    font-size: 12px;
    color: var(--gold);
    margin-bottom: 4px;
}

.solution-title {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.solution-desc {
    font-size: 14px;
    color: var(--light-gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.solution-features {
    margin-bottom: 20px;
}

.solution-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 8px;
}

.solution-feature::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: var(--gold);
    border-radius: 50%;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--gold);
    text-decoration: none;
    font-weight: 500;
}

.solution-link:hover {
    text-decoration: underline;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 50px;
}

.solution-tag {
    padding: 10px 24px;
    font-size: 13px;
    color: var(--gold);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.solution-tag:hover {
    background-color: rgba(208, 168, 92, 0.1);
}

/* ============================================
   产品展示区域 - 重要：后续添加新产品请参照此格式
   ============================================ */

/* ---- 产品筛选标签 ---- */
.product-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gold);
    background-color: transparent;
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--gold);
    color: var(--black);
    border-color: var(--gold);
}

/* ---- 产品网格 ---- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* ============================================
   产品卡片样式 - 重要：后续添加新产品请保持此结构
   ============================================ */
.product-card {
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    overflow: hidden;
    background-color: rgba(34, 34, 34, 0.5);
    transition: all 0.3s ease;
}

.product-card:hover {
    border-color: rgba(208, 168, 92, 0.5);
}

.product-image {
    position: relative;
    height: 180px;
    background: linear-gradient(135deg, rgba(0,0,0,0.8) 0%, rgba(34,34,34,0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: pointer;
}

.product-image img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
    transition: transform 0.5s ease;
}

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

.product-info {
    padding: 20px;
}

.product-category {
    font-size: 11px;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.product-name {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.product-name:hover {
    color: var(--gold);
}

.product-desc {
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-specs-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.product-spec-tag {
    padding: 4px 10px;
    font-size: 11px;
    color: var(--gold);
    background-color: rgba(208, 168, 92, 0.1);
    border-radius: 4px;
}

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

.product-actions .btn {
    flex: 1;
}

/* ---- 产品特色横幅 ---- */
.product-features-banner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 50px;
}

.product-feature-item {
    text-align: center;
    padding: 20px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.3);
}

.product-feature-title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--gold);
    margin-bottom: 6px;
}

.product-feature-desc {
    font-size: 12px;
    color: var(--light-gray);
}

/* ---- 案例区块 ---- */
.cases-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.cases-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--gold), transparent);
    transform: translateX(-50%);
}

.case-item {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.case-item:nth-child(even) .case-content {
    grid-column: 2;
}

.case-item:nth-child(even) {
    direction: rtl;
}

.case-item:nth-child(even) .case-content {
    direction: ltr;
}

.case-node {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 14px;
    height: 14px;
    background-color: var(--gold);
    border: 3px solid var(--black);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.case-content {
    padding: 24px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
}

.case-client {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--gold);
    margin-bottom: 8px;
}

.case-cooperation-year {
    font-size: 14px;
    color: var(--light-gray);
    margin-bottom: 16px;
}

.case-cooperation-year .year {
    color: var(--gold-light);
    font-weight: 600;
}

.case-section {
    margin-bottom: 16px;
}

.case-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.case-section-title .icon-pain {
    color: #ff6b6b;
}

.case-section-title .icon-solution {
    color: var(--gold);
}

.case-section-title .icon-result {
    color: #51cf66;
}

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

.case-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 6px;
}

.case-list li::before {
    content: '';
    width: 5px;
    height: 5px;
    margin-top: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.case-pain li::before {
    background-color: #ff6b6b;
}

.case-result li::before {
    background-color: #51cf66;
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 50px;
}

/* ---- 联系区块 ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(208, 168, 92, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-content h4 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.contact-content .contact-value {
    font-size: 18px;
    color: var(--gold);
    margin-bottom: 2px;
}

.contact-content .contact-sub {
    font-size: 13px;
    color: var(--light-gray);
}

.contact-services {
    padding: 24px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
    margin-top: 30px;
}

.contact-services h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.contact-services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.contact-service-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--light-gray);
}

.contact-service-item::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: var(--gold);
    border-radius: 50%;
}

/* ---- 联系表单 ---- */
.contact-form {
    padding: 40px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
}

.contact-form h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--gold);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--white);
    background-color: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 4px;
    transition: all 0.3s ease;
    font-family: var(--font-body);
}

.form-control:focus {
    outline: none;
    border-color: var(--gold);
}

.form-control::placeholder {
    color: rgba(204, 204, 204, 0.4);
}

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

.form-submit {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--black);
    background-color: var(--gold);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.form-submit:hover {
    background-color: var(--gold-light);
    box-shadow: 0 0 20px rgba(208, 168, 92, 0.4);
}

.form-note {
    font-size: 11px;
    color: rgba(204, 204, 204, 0.5);
    text-align: center;
    margin-top: 16px;
}

/* ---- 页脚 ---- */
.footer {
    border-top: 1px solid rgba(208, 168, 92, 0.2);
}

.footer-main {
    padding: 60px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand {
    max-width: 300px;
}

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

.footer-brand p {
    font-size: 14px;
    color: var(--light-gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 10px;
}

.footer-contact li span {
    color: var(--gold);
}

.footer-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 14px;
    color: var(--light-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid rgba(208, 168, 92, 0.1);
}

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

.footer-copyright {
    font-size: 13px;
    color: rgba(204, 204, 204, 0.5);
}

.footer-badges {
    display: flex;
    gap: 20px;
}

.footer-badge {
    font-size: 12px;
    color: rgba(204, 204, 204, 0.5);
}

.footer-slogan {
    padding: 16px 0;
    background-color: rgba(208, 168, 92, 0.05);
    text-align: center;
}

.footer-slogan p {
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--gold);
    letter-spacing: 2px;
}

/* ============================================
   产品详情页样式 - products/product-xxx.html
   ============================================ */
.product-detail {
    padding-top: 100px;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.product-detail-image {
    background: linear-gradient(135deg, rgba(0,0,0,0.8) 0%, rgba(34,34,34,0.8) 100%);
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.product-detail-image img {
    max-width: 100%;
    max-height: 350px;
    object-fit: contain;
}

.product-detail-info {
    padding: 20px 0;
}

.product-detail-category {
    font-size: 12px;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.product-detail-name {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.product-detail-desc {
    font-size: 15px;
    color: var(--light-gray);
    line-height: 1.7;
    margin-bottom: 30px;
}

.product-detail-section {
    margin-bottom: 30px;
}

.product-detail-section h4 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(208, 168, 92, 0.2);
}

.product-specs-table {
    width: 100%;
    border-collapse: collapse;
}

.product-specs-table tr {
    border-bottom: 1px solid rgba(208, 168, 92, 0.1);
}

.product-specs-table td {
    padding: 12px 0;
    font-size: 14px;
}

.product-specs-table td:first-child {
    color: var(--light-gray);
    width: 40%;
}

.product-specs-table td:last-child {
    color: var(--gold);
    font-weight: 500;
}

.product-detail-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
}

.product-detail-actions .btn {
    flex: 1;
    padding: 14px 28px;
}

/* ---- 相关产品 ---- */
.related-products {
    margin-top: 80px;
}

.related-products h3 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 30px;
    text-align: center;
}

/* ---- 规格书下载区域 ---- */
.datasheet-section {
    padding: 60px 0;
    background-color: rgba(208, 168, 92, 0.05);
    border-top: 1px solid rgba(208, 168, 92, 0.1);
    border-bottom: 1px solid rgba(208, 168, 92, 0.1);
}

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

.datasheet-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    border: 1px solid rgba(208, 168, 92, 0.2);
    border-radius: 8px;
    background-color: rgba(34, 34, 34, 0.5);
    text-decoration: none;
    transition: all 0.3s ease;
}

.datasheet-card:hover {
    border-color: rgba(208, 168, 92, 0.5);
    background-color: rgba(208, 168, 92, 0.05);
}

.datasheet-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(208, 168, 92, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 24px;
    flex-shrink: 0;
}

.datasheet-info {
    flex: 1;
}

.datasheet-title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.datasheet-meta {
    font-size: 12px;
    color: var(--light-gray);
}

.datasheet-arrow {
    color: var(--gold);
    font-size: 18px;
}

/* ============================================
   响应式设计 - 移动端适配
   ============================================ */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid,
    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .team-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid,
    .qual-grid,
    .stats-grid,
    .product-features-banner,
    .case-stats,
    .datasheet-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-timeline::before {
        left: 20px;
    }
    
    .case-item {
        grid-template-columns: 1fr;
        padding-left: 50px;
    }
    
    .case-item:nth-child(even) .case-content {
        grid-column: 1;
    }
    
    .case-item:nth-child(even) {
        direction: ltr;
    }
    
    .case-node {
        left: 20px;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-cta {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid,
    .products-grid,
    .solutions-grid,
    .qual-grid,
    .stats-grid,
    .product-features-banner,
    .case-stats,
    .datasheet-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .about-features,
    .form-row,
    .contact-services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .product-detail-image {
        min-height: 300px;
        padding: 20px;
    }
}

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

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(208, 168, 92, 0.4);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(208, 168, 92, 0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* Toast提示 */
.toast {
    position: fixed;
    top: 90px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: 16px 32px;
    background-color: var(--dark-gray);
    border: 1px solid rgba(208, 168, 92, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 14px;
    z-index: 9999;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-success {
    border-color: #51cf66;
}

.toast-error {
    border-color: #ff6b6b;
}