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

:root {
    --primary-color: #1a3a5c;
    --primary-light: #2c5282;
    --primary-dark: #0f2744;
    --accent-color: #c9a962;
    --text-color: #333;
    --text-light: #666;
    --text-muted: #999;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e8e8e8;
    --shadow: 0 2px 15px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    border-bottom: 1px solid #f0f0f0;
}

/* 导航左侧 Logo 区域 */
.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 主导航 - 居中 */
.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
    flex: 1;
    justify-content: center;
}

.nav-links a {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    white-space: nowrap;
}

/* 导航右侧（购买按钮 + 搜索） */
.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-buy {
    background: #1a1a1a;
    color: white;
    padding: 8px 18px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-buy:hover {
    background: #333;
    transform: translateY(-2px);
}

.search-box {
    display: flex;
    align-items: center;
    border: 1px solid #e8e8e8;
    border-radius: 20px;
    padding: 5px 15px;
    background: #f8f9fa;
}

.search-box input {
    border: none;
    background: transparent;
    padding: 8px;
    font-size: 15px;
    width: 180px;
    outline: none;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 8px;
}

/* 下拉菜单 */
.has-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    border-radius: 8px;
    list-style: none;
    padding: 10px 0;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    padding: 10px 20px;
    display: block;
    font-size: 13px;
    color: #666;
}

.dropdown-menu a:hover {
    background: #f5f5f5;
    color: var(--primary-color);
}

.dropdown-menu a::after {
    display: none;
}

.arrow {
    font-size: 10px;
    margin-left: 5px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.has-dropdown:hover .arrow {
    transform: rotate(180deg);
}

.logo {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
    line-height: 1;
}

.logo-cn {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 3px;
    margin-top: 3px;
}

.logo-divider {
    color: #ddd;
    font-size: 24px;
    font-weight: 300;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-links a .nav-icon {
    font-size: 14px;
    width: 16px;
    text-align: center;
    transition: transform 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

/* 首页横幅 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: 40px;
}

.hero-welcome {
    font-size: 16px;
    letter-spacing: 10px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 20px;
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-title {
    font-size: 56px !important;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 25px;
    white-space: nowrap;
    animation: fadeInUp 1s ease 0.5s both;
}

.hero-subtitle {
    font-size: 20px !important;
    letter-spacing: 4px;
    opacity: 0.9;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.7s both;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.9s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn {
    display: inline-block;
    padding: 18px 45px;
    border: 2px solid;
    border-radius: 0;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 2px;
    text-decoration: none;
    transition: all 0.3s ease;
    background: transparent;
}

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

.btn-primary:hover {
    background: transparent;
    color: white;
}

.btn-outline {
    border-color: rgba(255,255,255,0.5);
    color: white;
}

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

.btn-large {
    padding: 18px 50px;
    font-size: 16px;
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255,255,255,0.6);
    animation: bounce 2s infinite;
}

.scroll-down span {
    display: block;
    width: 20px;
    height: 30px;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 10px;
    margin: 0 auto 10px;
    position: relative;
}

.scroll-down span::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255,255,255,0.8);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 5px; }
    100% { opacity: 0; top: 15px; }
}

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

.scroll-down p {
    font-size: 12px;
    letter-spacing: 3px;
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

@media (max-width: 768px) {
    section {
        padding: 40px 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

@media (max-width: 768px) {
    .section-header {
        margin-bottom: 30px;
    }

    .section-subtitle {
        font-size: 11px;
        letter-spacing: 3px;
    }

    .section-title {
        font-size: 22px;
        letter-spacing: 2px;
    }

    .section-line {
        width: 40px;
        height: 2px;
        margin: 12px auto 0;
    }
}

.section-subtitle {
    font-size: 13px;
    letter-spacing: 5px;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.section-title {
    font-size: 48px;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 3px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    margin: 20px auto 0;
}

/* 品牌中心 */
.brand-section {
    background: var(--bg-white);
}

.brand-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 60px;
}

/* 反向布局 - 图片在左，文字在右 */
.brand-intro-reverse {
    direction: rtl;
}

.brand-intro-reverse .brand-text {
    direction: ltr;
}

.brand-intro-reverse .brand-image {
    direction: ltr;
}

.brand-text {
    padding: 20px 0;
}

.brand-text h3 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 600;
}

.brand-text p {
    color: var(--text-light);
    line-height: 2;
    font-size: 17px;
    text-align: justify;
}

.brand-signature {
    margin-top: 30px;
    font-family: 'Brush Script MT', cursive;
    font-size: 24px;
    color: var(--accent-color);
}

.brand-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--bg-light), #e8e8e8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 18px;
    letter-spacing: 3px;
}

.brand-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding: 50px;
    background: var(--bg-light);
    border-radius: 5px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.stat-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 15px;
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* 发展历程 */
.timeline-section {
    background: var(--bg-light);
}

.timeline-wrap {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
    text-align: right;
}

.timeline-year-box {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    border-radius: 5px;
    position: relative;
    z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-year-box {
    background: var(--accent-color);
}

.timeline-content {
    flex: 1;
    padding: 30px;
    background: white;
    border-radius: 5px;
    box-shadow: var(--shadow);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border: 10px solid transparent;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -20px;
    border-right-color: white;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -20px;
    border-left-color: white;
}

.timeline-content h4 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 15px;
}

/* 产品中心 */
.products-section {
    background: var(--bg-white);
}

.product-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 30px;
    border: 1px solid var(--border-color);
    background: white;
    cursor: pointer;
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

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

.products-wrap {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.product-card {
    background: white;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: pointer;
}

.product-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-10px);
}

.product-image-wrap {
    position: relative;
    width: 100%;
    height: 350px;
    overflow: hidden;
    background: #ffffff;
}

.product-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.6s ease;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 58, 92, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.product-overlay-btn {
    padding: 15px 35px;
    border: 2px solid white;
    background: transparent;
    color: white;
    cursor: pointer;
    font-size: 15px;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.product-overlay-btn:hover {
    background: white;
    color: var(--primary-color);
}

.product-info {
    padding: 25px;
    text-align: center;
}

.product-category {
    display: inline-block;
    padding: 5px 15px;
    background: var(--bg-light);
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.product-name {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 12px;
}

.product-description {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 15px;
}

.product-price {
    font-size: 26px;
    color: var(--accent-color);
    font-weight: 600;
}

/* 联系我们 */
.contact-section {
    background: var(--bg-light);
}

.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.contact-card {
    padding: 30px;
    background: white;
    border-left: 4px solid var(--primary-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
    transition: all 0.3s ease;
}

.contact-card:hover {
    box-shadow: var(--shadow);
    transform: translateX(10px);
}

.contact-icon {
    font-size: 32px;
}

.contact-card h4 {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 600;
}

.contact-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 40px;
    background: white;
    box-shadow: var(--shadow);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid var(--border-color);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form .btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    align-self: flex-start;
}

.contact-form .btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* 页脚 */
.footer {
    background: var(--primary-dark);
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
}

.footer-section {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: white;
    white-space: nowrap;
    margin: 0;
}

.footer-section p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    margin: 0;
    white-space: nowrap;
}

.contact-divider {
    color: rgba(255,255,255,0.3);
    font-size: 13px;
    margin: 0 3px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    color: rgba(255,255,255,0.3);
    font-size: 12px;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
}

.modal-dialog {
    position: relative;
    background: white;
    max-width: 1000px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 10;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 36px;
    cursor: pointer;
    color: var(--text-muted);
    background: none;
    border: none;
    z-index: 10;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--text-color);
}

.modal-product {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.modal-product-img {
    width: 100%;
    min-height: 500px;
    object-fit: cover;
    background: var(--bg-light);
}

.modal-product-info {
    padding: 50px;
}

.modal-product-info .product-category {
    background: var(--primary-color);
    color: white;
    padding: 8px 20px;
}

.modal-product-info .product-name {
    font-size: 32px;
    margin-bottom: 20px;
}

.modal-product-info .product-price {
    font-size: 36px;
    margin-bottom: 25px;
}

.modal-product-info .product-description {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.modal-details h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.modal-details pre {
    background: var(--bg-light);
    padding: 20px;
    font-family: inherit;
    font-size: 14px;
    line-height: 2;
    white-space: pre-wrap;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .nav-links {
        gap: 30px;
    }

    .hero-title {
        font-size: 42px;
    }

    .brand-intro {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .brand-intro-reverse {
        direction: ltr;
    }

    .brand-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-wrap {
        grid-template-columns: 1fr;
    }

    .contact-wrap {
        grid-template-columns: 1fr;
    }

    .modal-product {
        grid-template-columns: 1fr;
    }

    .modal-product-img {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    /* 移动端导航栏优化 */
    .navbar .container {
        padding: 12px 15px;
        transition: all 0.3s ease;
    }

    .logo {
        flex-shrink: 0;
    }

    .logo-text {
        font-size: 16px;
        font-weight: 700;
    }

    .logo-cn {
        font-size: 7px;
        letter-spacing: 2px;
    }

    .logo-divider {
        display: none;
    }

    /* 导航链接默认隐藏 */
    .nav-links {
        display: none;
    }

    /* 导航右侧在移动端隐藏搜索框，保留购买按钮 */
    .nav-right {
        gap: 8px;
        flex-shrink: 0;
    }

    .nav-right .search-box {
        display: none;
    }

    .btn-buy {
        padding: 8px 14px;
        font-size: 12px;
        border-radius: 20px;
    }

    /* 移动端首页标题 */
    .hero-title {
        font-size: 32px !important;
        letter-spacing: 2px;
        white-space: normal;
    }

    .hero-subtitle {
        font-size: 14px !important;
        letter-spacing: 2px;
    }

    /* 汉堡菜单按钮动画 */
    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 6px;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
        border: none;
        border-radius: 8px;
        box-shadow: 0 2px 10px rgba(26, 58, 92, 0.2);
        cursor: pointer;
        z-index: 1001;
        transition: all 0.3s ease;
    }

    .mobile-menu-btn:active {
        transform: scale(0.9);
    }

    .mobile-menu-btn span {
        width: 20px;
        height: 2px;
        background: white;
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .mobile-menu-btn span:nth-child(1) {
        transform: translateY(-5px);
    }

    .mobile-menu-btn span:nth-child(2) {
        transform: translateY(0);
    }

    .mobile-menu-btn span:nth-child(3) {
        transform: translateY(3px);
    }

    /* 菜单激活状态 */
    .mobile-menu-btn.active {
        background: var(--accent-color);
        box-shadow: 0 2px 15px rgba(201, 169, 98, 0.4);
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(0) rotate(-45deg);
    }

    /* 下拉菜单容器（移动端展开菜单） */
    .nav-links {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.95) 100%);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 15px;
        gap: 8px;
        box-shadow: 0 10px 40px rgba(0,0,0,0.15);
        z-index: 999;
        border-bottom: 1px solid rgba(26, 58, 92, 0.1);
        animation: slideDown 0.3s ease;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-links.active {
        display: flex;
    }

    /* 导航链接样式 */
    .nav-links a {
        padding: 12px 16px !important;
        font-size: 14px;
        font-weight: 500;
        border-radius: 10px;
        background: #f5f5f5;
        color: #333 !important;
        text-decoration: none;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .nav-links a .nav-icon {
        font-size: 16px;
        width: 20px;
        text-align: center;
        transition: transform 0.3s ease;
    }

    /* 选中状态 - 明显高亮 (li.active > a 或 a.active) - 使用 !important 强制应用 */
    .nav-links li.active > a,
    .nav-links a.active {
        background: linear-gradient(135deg, #1a3a5c 0%, #2c5282 100%) !important;
        color: #fff !important;
        box-shadow: 0 4px 15px rgba(26, 58, 92, 0.35);
        transform: translateX(5px);
    }

    .nav-links li.active > a .nav-icon,
    .nav-links a.active .nav-icon {
        transform: scale(1.1);
    }

    .nav-links li.active > a::before,
    .nav-links a.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        width: 4px;
        height: 100%;
        background: #c9a962;
    }

    /* 悬停效果 */
    .nav-links a:hover {
        background: linear-gradient(135deg, rgba(26, 58, 92, 0.08) 0%, rgba(26, 58, 92, 0.12) 100%);
        transform: translateX(3px);
    }

    .nav-links a:hover .nav-icon {
        transform: rotate(5deg);
    }

    /* 下拉菜单 */
    .has-dropdown {
        position: relative;
    }

    .has-dropdown > a {
        justify-content: space-between;
    }

    .has-dropdown > a::after {
        content: '';
        display: inline-block;
        width: 8px;
        height: 8px;
        border-right: 2px solid currentColor;
        border-bottom: 2px solid currentColor;
        transform: rotate(45deg);
        transition: transform 0.3s ease;
        margin-left: auto;
    }

    .has-dropdown.active > a::after {
        transform: rotate(-135deg);
    }

    .dropdown-menu {
        position: static !important;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        transition: all 0.3s ease;
        background: transparent;
    }

    .has-dropdown.active .dropdown-menu {
        opacity: 1;
        visibility: visible;
        max-height: 200px;
        margin-top: 8px;
    }

    .dropdown-menu a {
        background: transparent !important;
        font-size: 13px;
        padding: 10px 16px 10px 35px;
        margin-left: 10px;
        border-left: 3px solid transparent;
        color: var(--text-light);
    }

    .dropdown-menu a:hover,
    .dropdown-menu a.active {
        background: rgba(26, 58, 92, 0.08) !important;
        color: var(--primary-color);
        border-left-color: var(--accent-color);
    }

    /* 分割线 */
    .nav-divider {
        height: 1px;
        background: linear-gradient(90deg, transparent 0%, rgba(26, 58, 92, 0.15) 50%, transparent 100%);
        margin: 10px 0;
    }

    .footer-content {
        flex-direction: column;
        gap: 25px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
}

    .hero-title {
        font-size: 32px;
        letter-spacing: 5px;
    }

    .hero-subtitle {
        font-size: 16px;
        letter-spacing: 3px;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 32px;
    }

    .brand-stats {
        grid-template-columns: 1fr;
    }

    .timeline-item {
        flex-direction: column !important;
        text-align: center;
    }

    .timeline-year-box {
        width: 80px;
        height: 80px;
        font-size: 20px;
        margin: 0 auto;
    }

    .timeline-content {
        margin-top: 20px;
    }

    .timeline-content::before {
        display: none;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

/* 产品页面移动端优化 */
@media (max-width: 768px) {
    /* 页面页头 */
    .page-header {
        padding: 80px 15px 40px;
        margin-top: 50px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .page-header p {
        font-size: 14px;
    }

    /* 品牌切换标签 */
    .brand-tabs {
        gap: 15px;
        margin: 25px 0 20px;
    }

    .brand-tab {
        padding: 12px 25px;
        min-width: 120px;
    }

    .brand-tab .brand-name {
        font-size: 16px;
    }

    .brand-tab .brand-cn {
        font-size: 11px;
    }

    /* 分类筛选按钮 */
    .category-filter {
        gap: 8px;
        margin-bottom: 25px;
    }

    .category-btn {
        padding: 8px 18px;
        font-size: 13px;
        border-radius: 20px;
    }

    /* 产品网格 */
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 40px;
    }

    .product-card {
        border-radius: 12px;
    }

    .product-image-wrap {
        height: 200px;
    }

    .product-info {
        padding: 15px;
    }

    .product-category {
        padding: 3px 10px;
        font-size: 11px;
        border-radius: 12px;
    }

    .product-name {
        font-size: 16px;
        margin: 8px 0;
    }

    .product-desc {
        font-size: 13px;
        line-height: 1.6;
    }
}

/* 产品说明书区域 */
.manuals-section {
    padding: 100px 0;
    background: var(--section-bg);
}

.manuals-wrap {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.manual-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.manual-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.manual-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #f5f5f5;
}

.manual-cover-placeholder {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    color: #ccc;
    font-size: 60px;
}

.manual-info {
    padding: 20px;
}

.manual-info h4 {
    font-size: 18px;
    color: var(--text-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.manual-product {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.manual-video-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--primary-color);
    background: rgba(74, 74, 217, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
}

/* 说明书详情模态框样式 */
.modal-manual-detail {
    padding: 30px;
}

.modal-manual-detail .manual-title {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.modal-manual-detail .manual-cover-img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 20px;
}

.modal-manual-detail .manual-video {
    width: 100%;
    margin-bottom: 20px;
}

.modal-manual-detail .manual-video iframe {
    width: 100%;
    height: 400px;
    border-radius: 8px;
}

.modal-manual-detail .manual-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
}

.modal-manual-detail .manual-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
}

/* 说明书详情页 */
.manual-detail-page {
    padding: 100px 0 60px;
    background: var(--section-bg);
    min-height: 70vh;
}

.manual-detail-header {
    margin-bottom: 40px;
}

.manual-detail-header .back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 20px;
    transition: color 0.3s;
}

.manual-detail-header .back-link:hover {
    color: var(--primary-color);
}

.manual-detail-header h1 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin: 0;
}

.manual-detail-cover {
    width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.manual-detail-video {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin-bottom: 30px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.manual-detail-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.manual-detail-content {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    line-height: 1.8;
}

.manual-detail-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
}

.manual-detail-content h1,
.manual-detail-content h2,
.manual-detail-content h3 {
    margin-top: 30px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.manual-detail-content p {
    margin-bottom: 15px;
}

.manual-detail-content ul,
.manual-detail-content ol {
    margin-bottom: 15px;
    padding-left: 30px;
}

.manual-detail-content li {
    margin-bottom: 8px;
}

.error-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
    font-size: 1.1rem;
}

/* 产品详情页 */
.product-detail-page {
    padding: 100px 0 60px;
    background: var(--section-bg);
    min-height: 70vh;
}

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

.product-detail-header .back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

.product-detail-header .back-link:hover {
    color: var(--primary-color);
}

.product-detail-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.product-detail-image {
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.product-detail-image img {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 8px;
}

.product-detail-info {
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-category-tag {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 15px;
    align-self: flex-start;
}

.product-detail-title {
    font-size: 2rem;
    color: var(--text-color);
    margin: 0 0 15px 0;
}

.product-detail-price {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.product-detail-description {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.05rem;
}

.product-detail-full {
    background: white;
    border-radius: 12px;
    padding: 50px 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    max-width: 900px;
    margin: 0 auto;
}

.detail-section {
    margin-bottom: 50px;
    padding: 35px;
    background: linear-gradient(to bottom, #fff, #fafbfc);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

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

.detail-section h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-section h3::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 24px;
    background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.detail-content {
    line-height: 1.9;
    color: var(--text-color);
    font-size: 1.05rem;
}

.detail-content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 25px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.detail-content p {
    margin-bottom: 18px;
    text-align: justify;
}

.detail-content h1,
.detail-content h2,
.detail-content h3 {
    margin-top: 30px;
    margin-bottom: 18px;
    color: var(--primary-color);
    font-weight: 600;
}

.detail-content ul,
.detail-content ol {
    margin-bottom: 18px;
    padding-left: 25px;
}

.detail-content li {
    margin-bottom: 10px;
}

.detail-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding: 15px 20px;
    margin: 20px 0;
    background: var(--bg-light);
    border-radius: 0 8px 8px 0;
    color: var(--text-light);
}

.product-video {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 30px 0;
}

.product-video iframe,
.product-video video {
    width: 100%;
    max-width: 900px;
    height: auto;
    aspect-ratio: 16/9;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    background: #000;
}

/* 产品详情页的说明书区域 */
.product-manuals-section {
    margin-top: 50px;
    padding: 50px 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.product-manuals-section .section-header {
    text-align: center;
    margin-bottom: 40px;
}

.product-manuals-section .section-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.product-manuals-section .section-title {
    font-size: 1.8rem;
    color: var(--text-color);
    margin: 0;
}

.product-manuals-section .section-line {
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 15px auto;
}

/* 说明书直接展示样式 */
.manual-content-full {
    margin-top: 30px;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.manual-content-full .manual-cover {
    text-align: center;
    margin-bottom: 25px;
}

.manual-content-full .manual-cover img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.manual-content-full .manual-title {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent-color);
}

.manual-content-full .manual-video {
    margin: 20px 0;
}

.manual-content-full .manual-video iframe,
.manual-content-full .manual-video video {
    width: 100%;
    max-width: 800px;
    height: 450px;
    border-radius: 8px;
}

.manual-content-full .manual-content {
    line-height: 1.8;
    color: var(--text-color);
}

.manual-content-full .manual-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 15px 0;
    border-radius: 6px;
}

.manual-content-full .manual-content p {
    margin-bottom: 15px;
}

.manual-content-full .manual-content h1,
.manual-content-full .manual-content h2,
.manual-content-full .manual-content h3 {
    color: var(--primary-color);
    margin: 25px 0 15px;
}

/* 响应式 */
@media (max-width: 768px) {
    /* 产品详情页头 - 降低高度确保返回按钮可点击 */
    .product-detail-page {
        padding-top: 60px;
    }

    .product-detail-header {
        margin-bottom: 15px;
        padding: 0 15px;
    }

    .product-detail-header .back-link {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
        padding: 8px 12px;
        font-size: 14px;
        background: rgba(26, 58, 92, 0.08);
        border-radius: 8px;
        gap: 6px;
    }

    .product-detail-header .back-link i {
        font-size: 16px;
    }

    /* 产品详情主区域 */
    .product-detail-main {
        grid-template-columns: 1fr;
    }

    .product-detail-image {
        padding: 20px;
    }

    .product-detail-info {
        padding: 30px 20px;
    }

    .product-detail-title {
        font-size: 1.5rem;
    }

    .product-detail-full {
        padding: 25px 15px;
        max-width: 100%;
        border-radius: 0;
        box-shadow: none;
    }

    .detail-section {
        padding: 20px 15px;
    }

    .detail-section h3 {
        font-size: 1.2rem;
    }

    .detail-content {
        font-size: 1rem;
    }

    .product-video iframe,
    .product-video video {
        max-width: 100%;
    }

    .product-manuals-section {
        padding: 30px 20px;
    }
}

/* ====================== 独立页面样式 ====================== */

/* 页面页头 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
    margin-top: 60px;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 16px;
    opacity: 0.9;
    letter-spacing: 2px;
}

/* 品牌切换标签 */
.brand-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0 30px;
}

.brand-tab {
    padding: 15px 40px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    min-width: 150px;
}

.brand-tab .brand-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.brand-tab .brand-cn {
    font-size: 12px;
    color: var(--text-muted);
}

.brand-tab.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.brand-tab.active .brand-name,
.brand-tab.active .brand-cn {
    color: white;
}

.brand-tab:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

/* 分类筛选按钮 */
.category-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.category-btn {
    padding: 10px 25px;
    border: 1px solid #e0e0e0;
    background: white;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 14px;
    color: #666;
    position: relative;
    overflow: hidden;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(26, 58, 92, 0.08);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.category-btn:hover::before {
    width: 300px;
    height: 300px;
}

.category-btn:hover {
    border-color: #1a3a5c;
    color: #1a3a5c;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 58, 92, 0.15);
}

.category-btn.active {
    background: #1a3a5c;
    color: white;
    border-color: #1a3a5c;
    box-shadow: 0 4px 15px rgba(26, 58, 92, 0.3);
    transform: translateY(-2px);
}

/* 子分类筛选 */
.subcategory-filter {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    padding: 12px 20px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #1a3a5c;
}

.subcategory-label {
    font-size: 13px;
    color: #666;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    padding-right: 10px;
    border-right: 1px solid #e0e0e0;
    margin-right: 5px;
}

.subcategory-label i {
    font-size: 12px;
    color: #1a3a5c;
}

.subcategory-btn {
    padding: 6px 16px;
    border: 1px dashed #ccc;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 12px;
    color: #666;
}

.subcategory-btn:hover {
    border-color: #1a3a5c;
    color: #1a3a5c;
    background: rgba(26, 58, 92, 0.05);
}

.subcategory-btn.active {
    background: #1a3a5c;
    color: white;
    border-color: #1a3a5c;
    border-style: solid;
    box-shadow: 0 2px 8px rgba(26, 58, 92, 0.2);
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    cursor: pointer;
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.product-image-wrap {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: #ffffff;
}

.product-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.5s ease;
}

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

.product-info {
    padding: 20px;
}

.product-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: 15px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.product-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 服务页面样式 */
.contact-section,
.brand-intro-section,
.after-sales-section {
    padding: 80px 0;
}

.contact-section {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.contact-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.contact-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.contact-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.contact-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}

/* 品牌介绍 */
.brand-intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.brand-desc p {
    font-size: 16px;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 20px;
}

.brand-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: 15px;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

/* 售后服务网格 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: white;
    padding: 35px 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
}

.service-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-color);
}

.service-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 联系表单 */
.contact-form-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-form {
    max-width: 800px;
    margin: 40px auto 0;
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.btn-block {
    width: 100%;
    padding: 15px;
    font-size: 16px;
}

/* 关于页面 */
/* 品牌介绍标题 */
.brand-intro-header {
    background: #fff;
    padding: 100px 0 50px;
    text-align: center;
}

.brand-intro-header .section-subtitle {
    font-size: 13px;
    letter-spacing: 6px;
    color: #c9a962;
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.brand-intro-header .section-title {
    font-size: 42px;
    font-weight: 700;
    color: #1a3a5c;
    margin-bottom: 18px;
    letter-spacing: 3px;
}

.brand-intro-header .section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    margin: 20px auto 0;
}

/* 品牌介绍内容 */
.brand-intro-section {
    padding: 30px 0 40px;
}

/* 品牌介绍标题字体 */
.brand-desc h2 {
    font-size: 32px;
    color: #1a3a5c;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 1px;
}

/* 品牌介绍描述文字 */
.brand-desc p {
    font-size: 14px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 10px;
    font-weight: 400;
    text-align: justify;
}

.brand-team {
    color: #c9a962 !important;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 2px;
    margin-top: 15px;
}

/* 品牌图片 */
.brand-image img {
    width: 100%;
    height: auto;
    border-radius: 0;
    box-shadow: none;
    display: block;
}

/* 品牌统计数据 */
.brand-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 30px auto 0;
    padding: 0;
    background: transparent;
    border-radius: 0;
}

.stat-item {
    text-align: center;
    padding: 35px 25px;
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.stat-item:hover {
    border-color: #c9a962;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    transform: translateY(-3px);
}

.stat-item .stat-icon {
    font-size: 42px;
    margin-bottom: 18px;
    display: block;
}

/* 彩色图标 - 与参考图一致 */
.stat-item:nth-child(1) .stat-icon { color: #e6a23c; }
.stat-item:nth-child(2) .stat-icon { color: #d97706; }
.stat-item:nth-child(3) .stat-icon { color: #6366f1; }
.stat-item:nth-child(4) .stat-icon { color: #2563eb; }

.stat-item .stat-number {
    display: block;
    font-size: 38px;
    font-weight: 700;
    color: #1a3a5c;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.stat-item .stat-label {
    font-size: 13px;
    color: #999;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.company-intro-section {
    padding: 80px 0;
}

.company-intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.intro-desc {
    font-size: 16px;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 20px;
}

.intro-stats {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

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

.intro-stat .stat-num {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
}

.intro-stat .stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

.intro-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

/* 时间轴 */
.timeline-section {
    padding: 60px 0;
    background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 100%);
}

.timeline-container {
    position: relative;
    max-width: 1000px;
    margin: 50px auto 0;
    padding-left: 60px;
}

/* 时间轴线 - 左侧垂直线 */
.timeline-container::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 30px;
    bottom: 50px;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color) 0%, rgba(26, 58, 92, 0.2) 100%);
    border-radius: 3px;
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

/* 左侧圆点 */
.timeline-dot {
    width: 16px;
    height: 16px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: -52px;
    top: 20px;
    box-shadow: 0 0 0 4px rgba(26, 58, 92, 0.1);
    transition: all 0.3s ease;
    z-index: 2;
    flex-shrink: 0;
}

.timeline-item:hover .timeline-dot {
    transform: translateY(-50%) scale(1.2);
    box-shadow: 0 0 0 6px rgba(26, 58, 92, 0.15);
}

/* 年份标签 */
.timeline-year {
    min-width: 70px;
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    padding: 8px 16px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(26, 58, 92, 0.25);
    position: relative;
    z-index: 2;
    margin-bottom: 10px;
}

/* 连接线 - 从年份标签向下到内容卡片 */
.timeline-year::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -20px;
    transform: translateX(-50%);
    width: 3px;
    height: 20px;
    background: linear-gradient(180deg, var(--primary-color) 0%, rgba(26, 58, 92, 0.3) 100%);
}

/* 时间轴包装器 - 包含年份和内容 */
.timeline-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-left: 10px;
}

/* 内容卡片 */
.timeline-content {
    flex: 1;
    background: white;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(26, 58, 92, 0.06);
    width: 100%;
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 25px rgba(0,0,0,0.12);
}

.timeline-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.timeline-title::before {
    content: '';
    width: 4px;
    height: 18px;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.timeline-description {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
    padding-left: 14px;
}

/* 企业文化 */
.culture-section {
    padding: 80px 0;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.culture-card {
    text-align: center;
    padding: 35px 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: var(--accent-color);
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent-color), #b8963f);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
}

.culture-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-color);
}

.culture-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
}

/* 响应式 */
@media (max-width: 992px) {
    .brand-intro-content,
    .company-intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-image {
        order: -1;
    }

    .brand-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    .brand-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-item {
        padding: 20px 10px;
    }

    .stat-item .stat-icon {
        font-size: 32px;
    }

    .stat-item .stat-number {
        font-size: 28px;
    }

    .stat-item .stat-label {
        font-size: 11px;
    }
}

@media (max-width: 768px) {
    /* 页面页头 */
    .page-header {
        padding: 60px 15px 30px;
        margin-top: 50px;
    }

    .page-header h1 {
        font-size: 24px;
    }

    .page-header p {
        font-size: 12px;
    }

    /* 品牌切换标签 */
    .brand-tabs {
        gap: 10px;
        margin: 20px 0;
    }

    .brand-tab {
        padding: 10px 20px;
        min-width: 100px;
    }

    .brand-tab .brand-name {
        font-size: 14px;
    }

    .brand-tab .brand-cn {
        font-size: 10px;
    }

    /* 分类筛选按钮 */
    .category-filter {
        gap: 8px;
        margin-bottom: 20px;
    }

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

    /* 产品网格 - 2 列显示 */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-bottom: 30px;
    }

    .product-card {
        border-radius: 10px;
        overflow: hidden;
    }

    .product-image-wrap {
        height: 140px;
    }

    .product-info {
        padding: 10px;
    }

    .product-category {
        padding: 3px 8px;
        font-size: 10px;
        border-radius: 10px;
        margin-bottom: 6px;
    }

    .product-name {
        font-size: 13px;
        margin: 6px 0;
        line-height: 1.3;
    }

    .product-desc {
        font-size: 11px;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 品牌介绍 */
    .brand-intro-content,
    .company-intro-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .intro-image {
        order: 0;
    }

    /* 品牌统计数据 */
    .brand-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-top: 15px;
    }

    .stat-item {
        padding: 12px 8px;
        border-radius: 8px;
    }

    .stat-item .stat-icon {
        font-size: 24px;
        margin-bottom: 8px;
    }

    .stat-item .stat-number {
        font-size: 20px;
    }

    .stat-item .stat-label {
        font-size: 10px;
    }

    /* 企业文化卡片 */
    .culture-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .culture-card {
        padding: 20px 12px;
        border-radius: 10px;
    }

    .culture-card:hover {
        transform: translateY(-3px);
    }

    .culture-icon {
        width: 50px;
        height: 50px;
        font-size: 22px;
        margin-bottom: 12px;
    }

    .culture-card h3 {
        font-size: 14px;
        margin-bottom: 8px;
    }

    .culture-card p {
        font-size: 11px;
        line-height: 1.6;
    }

    /* 联系我们网格 */
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-top: 25px;
    }

    .contact-card {
        padding: 20px 12px;
        border-radius: 10px;
    }

    .contact-card h3 {
        font-size: 13px;
        margin-bottom: 8px;
    }

    .contact-card p {
        font-size: 11px;
        line-height: 1.5;
    }

    .contact-icon {
        width: 50px;
        height: 50px;
        font-size: 18px;
        margin-bottom: 12px;
    }

    /* 售后服务网格 */
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-top: 25px;
    }

    .service-card {
        padding: 20px 12px;
        border-radius: 10px;
    }

    .service-card h3 {
        font-size: 13px;
        margin-bottom: 8px;
    }

    .service-card p {
        font-size: 11px;
        line-height: 1.5;
    }

    .service-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
        margin-bottom: 12px;
    }

    /* 时间轴 - 移动端垂直布局 */
    .timeline-container {
        padding-left: 30px;
    }

    .timeline-container::before {
        left: 8px;
        top: 20px;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 35px;
        position: relative;
    }

    /* 移动端圆点移到左侧线上 */
    .timeline-dot {
        left: -18px;
        top: 8px;
        transform: none;
    }

    .timeline-item:hover .timeline-dot {
        transform: scale(1.2);
    }

    /* 移动端隐藏向下连接线 */
    .timeline-year::after {
        display: none;
    }

    .timeline-year {
        text-align: center;
        font-size: 15px;
        padding: 6px 14px;
        align-self: center;
        margin-left: 30px;
    }

    .timeline-wrapper {
        flex: 1;
        width: 100%;
    }

    .timeline-content {
        padding: 18px;
        border-radius: 12px;
        margin-left: 0;
        width: 100%;
    }

    .timeline-content:hover {
        transform: translateY(-3px);
    }

    .timeline-title {
        font-size: 15px;
    }

    .timeline-description {
        font-size: 13px;
        line-height: 1.7;
        padding-left: 0;
    }

    .timeline-content {
        padding: 20px;
        border-radius: 12px;
    }

    .timeline-title {
        font-size: 16px;
    }

    .timeline-description {
        font-size: 13px;
        line-height: 1.7;
        padding-left: 0;
    }

    /* 表单 */
    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 20px;
        margin: 20px auto;
    }

    .form-group input,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 13px;
    }

    .btn-block {
        padding: 12px;
        font-size: 14px;
    }

    /* 页脚 - 移动端优化 */
    .footer {
        padding: 40px 15px 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }

    .footer-section {
        padding: 0;
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .footer-section h4 {
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.5px;
        color: rgba(255,255,255,0.9);
        white-space: nowrap;
    }

    .footer-section p {
        font-size: 12px;
        color: rgba(255,255,255,0.7);
        line-height: 1.8;
        text-align: center;
    }

    /* 联系方式 - 移动端居中排列 */
    .footer-contact {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 15px;
        font-size: 12px;
        align-items: center;
    }

    .footer-contact p {
        margin: 0;
        white-space: nowrap;
        display: flex;
        align-items: center;
    }

    .footer-contact p:first-child::after {
        content: '';
        display: none;
    }

    /* 移动端隐藏联系方式中间的竖线 */
    .contact-divider {
        display: none;
    }

    /* 手机端隐藏页脚竖线分隔符 */
    .footer-divider {
        display: none;
    }

    .footer-bottom {
        margin-top: 25px;
        padding-top: 25px;
        font-size: 11px;
        text-align: center;
    }

    /* 关于页面 */
    .about-hero h1 {
        font-size: 28px;
    }
}