/* ===== 北京精显科技有限公司 企业官网样式 ===== */

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

:root {
    --primary: #0056b3;
    --primary-dark: #003d80;
    --primary-light: #007bff;
    --accent: #00c2ff;
    --accent-orange: #ff6b35;
    --dark: #1a1a2e;
    --dark-2: #16213e;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-primary: 0 4px 20px rgba(0, 86, 179, 0.3);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

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

/* ===== 顶部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

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

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.2;
}

.logo-text span {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: var(--gray-500);
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-item {
    position: relative;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius-sm);
}

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

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-item:hover::after {
    width: 30px;
}

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-600);
}

.header-phone svg {
    width: 18px;
    height: 18px;
    color: var(--primary);
}

.header-phone strong {
    color: var(--primary);
    font-size: 16px;
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    transition: var(--transition);
}

/* ===== Banner 区域 ===== */
.banner {
    position: relative;
    height: 600px;
    margin-top: 70px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 50%, var(--primary-dark) 100%);
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 194, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 194, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.banner-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: center;
}

.banner-text {
    max-width: 600px;
    color: var(--white);
}

.banner-subtitle {
    font-size: 16px;
    color: var(--accent);
    margin-bottom: 16px;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.banner-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 24px;
}

.banner-title span {
    background: linear-gradient(90deg, var(--accent), #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.banner-btns {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 86, 179, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

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

.btn-dark:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.banner-image {
    position: absolute;
    right: -50px;
    top: 50%;
    transform: translateY(-50%);
    width: 550px;
    height: 450px;
    opacity: 0.6;
}

.banner-image-placeholder {
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at center, rgba(0, 194, 255, 0.2) 0%, transparent 70%),
        linear-gradient(45deg, rgba(0, 123, 255, 0.1) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(0, 123, 255, 0.1) 25%, transparent 25%);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    border: 1px solid rgba(0, 194, 255, 0.3);
    border-radius: var(--radius-lg);
    position: relative;
}

.banner-image-placeholder::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 140px;
    background: linear-gradient(135deg, #2a2a4a, #1a1a3e);
    border: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    box-shadow: 0 0 40px rgba(0, 194, 255, 0.3);
}

.banner-image-placeholder::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 2px;
    opacity: 0.5;
}

/* ===== 通用区块 ===== */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--gray-100);
}

.section-dark {
    background: var(--dark);
    color: var(--white);
}

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

.section-subtitle {
    font-size: 14px;
    color: var(--primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
    font-weight: 500;
}

.section-dark .section-subtitle {
    color: var(--accent);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
}

.section-dark .section-title {
    color: var(--white);
}

.section-desc {
    font-size: 16px;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 公司简介 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
}

.about-icon {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.about-icon svg {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
}

.about-icon p {
    font-size: 18px;
    font-weight: 500;
}

.about-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
    line-height: 1.4;
}

.about-content h2 span {
    color: var(--primary);
}

.about-content p {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.9;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.stat-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-600);
}

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

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--gray-200), var(--gray-300));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 86, 179, 0.1), rgba(0, 194, 255, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-image::before {
    opacity: 1;
}

.product-icon {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.product-icon svg {
    width: 40px;
    height: 40px;
    color: var(--primary);
}

.product-info {
    padding: 24px;
}

.product-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
    transition: var(--transition);
}

.product-card:hover .product-title {
    color: var(--primary);
}

.product-desc {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-link {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.product-link svg {
    width: 14px;
    height: 14px;
    transition: var(--transition);
}

.product-card:hover .product-link svg {
    transform: translateX(4px);
}

/* ===== 动态渲染的卡片（链接形式） ===== */
a.product-card,
a.news-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.more-products {
    text-align: center;
    margin-top: 50px;
}

/* ===== 核心优势 ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 40px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.advantage-item:hover {
    background: rgba(0, 194, 255, 0.1);
    border-color: var(--accent);
    transform: translateY(-6px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.advantage-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 12px;
}

.advantage-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* ===== 新闻动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.news-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    position: relative;
    overflow: hidden;
}

.news-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.1), transparent);
}

.news-date {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(255, 255, 255, 0.95);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    text-align: center;
    z-index: 2;
}

.news-date .day {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.news-date .month {
    font-size: 11px;
    color: var(--gray-600);
    margin-top: 2px;
}

.news-body {
    padding: 24px;
}

.news-category {
    display: inline-block;
    font-size: 12px;
    color: var(--primary);
    background: rgba(0, 86, 179, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.news-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.5;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card:hover .news-title {
    color: var(--primary);
}

.news-excerpt {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== 联系区域 ===== */
.contact-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark) 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}

.contact-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-text h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.contact-text p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--white);
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon svg {
    width: 22px;
    height: 22px;
    color: var(--accent);
}

.contact-info-text h4 {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
}

.contact-info-text p {
    font-size: 16px;
    color: var(--white);
    font-weight: 500;
    margin: 0;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

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

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

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.6);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    color: var(--white);
    font-size: 20px;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-social svg {
    width: 18px;
    height: 18px;
    color: white;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-contact-item {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 14px;
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ===== 内页 Banner ===== */
.page-banner {
    height: 350px;
    margin-top: 70px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 194, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 194, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

.page-banner-content {
    position: relative;
    z-index: 2;
    color: var(--white);
}

.page-banner h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-banner p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb svg {
    width: 14px;
    height: 14px;
}

/* ===== 产品列表页 ===== */
.product-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--gray-100);
    border: none;
    border-radius: 30px;
    font-size: 14px;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
}

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

.product-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-list .product-card .product-image {
    height: 240px;
}

/* ===== 关于页面 ===== */
.about-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.about-hero-text h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
}

.about-hero-text h2 span {
    color: var(--primary);
}

.about-hero-text p {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-hero-image {
    height: 400px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-hero-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.culture-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.culture-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.culture-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
}

.culture-item p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.8;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-300);
    transform: translateX(-50%);
}

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

.timeline-item:nth-child(even) {
    justify-content: flex-end;
}

.timeline-content {
    width: 45%;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 5%;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 5%;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 30px;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border: 3px solid var(--white);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: var(--shadow-sm);
    z-index: 2;
}

.timeline-year {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== 新闻页面 ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-item {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.news-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(4px);
}

.news-item-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    position: relative;
}

.news-item-content {
    padding: 30px 30px 30px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-item-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--gray-500);
}

.news-item-meta .news-item-category {
    color: var(--primary);
    font-weight: 500;
}

.news-item-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.4;
    transition: var(--transition);
}

.news-item:hover .news-item-title {
    color: var(--primary);
}

.news-item-excerpt {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-item-more {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--gray-700);
    transition: var(--transition);
}

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

/* ===== 联系页面 ===== */
.contact-page-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.contact-info-section > p {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-detail-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.contact-detail-item {
    display: flex;
    gap: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-200);
}

.contact-detail-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-detail-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.contact-detail-text h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}

.contact-detail-text p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

.contact-map {
    width: 100%;
    height: 300px;
    background: var(--gray-200);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    font-size: 14px;
}

.contact-form-section {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.contact-form-section > p {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 32px;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
    border: none;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .header-phone {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .banner {
        height: 500px;
    }
    
    .banner-title {
        font-size: 32px;
    }
    
    .banner-image {
        display: none;
    }
    
    .about-grid,
    .contact-content,
    .about-hero,
    .contact-page-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .products-grid,
    .news-grid,
    .advantages-grid,
    .product-list,
    .culture-grid {
        grid-template-columns: 1fr;
    }
    
    .news-item {
        grid-template-columns: 1fr;
    }
    
    .news-item-content {
        padding: 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .page-banner h1 {
        font-size: 28px;
    }
    
    .page-banner {
        height: 280px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        justify-content: flex-start;
        padding-left: 50px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin: 0;
    }
    
    .timeline-dot {
        left: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form,
    .contact-form-section {
        padding: 24px;
    }
}