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

:root {
    --primary-color: #2c5aa0;
    --secondary-color: #f8f9fa;
    --accent-color: #ff6b35;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #e55a2b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Hero视觉元素 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.bag-showcase {
    position: relative;
    width: 300px;
    height: 300px;
}

.bag {
    position: absolute;
    width: 120px;
    height: 160px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.bag-1 {
    background: linear-gradient(45deg, #8B4513, #A0522D);
    top: 20px;
    left: 20px;
    animation-delay: 0s;
}

.bag-2 {
    background: linear-gradient(45deg, #F5F5DC, #DEB887);
    top: 60px;
    right: 20px;
    animation-delay: 1s;
}

.bag-3 {
    background: linear-gradient(45deg, #87CEEB, #B0E0E6);
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 产品展示 */
.products {
    padding: 80px 0;
    background: var(--secondary-color);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

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

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


.product-image {
    height: 250px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 60%, rgba(0, 0, 0, 0.2) 100%);
    opacity: 0;
    transition: var(--transition);
}

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

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.02);
    transition: transform 0.6s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

/* 兼容旧的可视化占位元素 */
.product-visual {
    width: 120px;
    height: 160px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.kraft-bag {
    background: linear-gradient(45deg, #8B4513, #A0522D);
}

.greaseproof-bag {
    background: linear-gradient(45deg, #F5F5DC, #DEB887);
}

.nonwoven-bag {
    background: linear-gradient(45deg, #87CEEB, #B0E0E6);
}

.product-content {
    padding: 2rem;
}

.product-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.product-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.product-features {
    list-style: none;
    margin-bottom: 2rem;
}

.product-features li {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.product-features i {
    color: var(--accent-color);
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

/* 优势展示 */
.features {
    padding: 80px 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #4a90e2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--white);
    font-size: 2rem;
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-item p {
    color: var(--text-light);
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: var(--secondary-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.contact-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-details p {
    color: var(--text-light);
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

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

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p,
.footer-section li {
    color: #bdc3c7;
    margin-bottom: 0.5rem;
}

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

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    color: #bdc3c7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        height: 300px;
    }

    .bag-showcase {
        width: 250px;
        height: 250px;
    }

    .bag {
        width: 100px;
        height: 130px;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .product-card {
        margin: 0 10px;
    }

    .contact-form {
        padding: 1.5rem;
    }
}

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

.product-card,
.feature-item {
    animation: fadeInUp 0.6s ease-out;
}

/* 产品页面样式 */
.product-hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #4a90e2 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.product-hero::before {
    content: '';
    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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.product-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.product-hero-text h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.product-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.product-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.product-hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.product-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.kraft-bag-showcase,
.greaseproof-bag-showcase,
.nonwoven-bag-showcase {
    position: relative;
    width: 300px;
    height: 300px;
}

.bag-main {
    position: absolute;
    width: 150px;
    height: 200px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.bag-detail {
    position: absolute;
    width: 80px;
    height: 100px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    animation: float 3s ease-in-out infinite;
    animation-delay: 1.5s;
}

.kraft-bag-showcase .bag-main {
    background: linear-gradient(45deg, #8B4513, #A0522D);
    top: 50px;
    left: 50px;
}

.kraft-bag-showcase .bag-detail {
    background: linear-gradient(45deg, #D2691E, #CD853F);
    top: 120px;
    right: 50px;
}

.greaseproof-bag-showcase .bag-main {
    background: linear-gradient(45deg, #F5F5DC, #DEB887);
    top: 50px;
    left: 50px;
}

.greaseproof-bag-showcase .bag-detail {
    background: linear-gradient(45deg, #F0E68C, #DAA520);
    top: 120px;
    right: 50px;
}

.nonwoven-bag-showcase .bag-main {
    background: linear-gradient(45deg, #87CEEB, #B0E0E6);
    top: 50px;
    left: 50px;
}

.nonwoven-bag-showcase .bag-detail {
    background: linear-gradient(45deg, #4682B4, #5F9EA0);
    top: 120px;
    right: 50px;
}

/* 产品详情 */
.product-details {
    padding: 80px 0;
    background: var(--white);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.product-info h2,
.product-specs h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.features-list .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.features-list .feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #4a90e2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 规格表格 */
.specs-table {
    background: var(--secondary-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row:nth-child(even) {
    background: rgba(255, 255, 255, 0.5);
}

.spec-label {
    font-weight: 600;
    color: var(--text-dark);
}

.spec-value {
    color: var(--text-light);
    text-align: right;
}

/* 应用场景 */
.applications {
    padding: 80px 0;
    background: var(--secondary-color);
}

.applications h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.application-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-color), #ff8c42);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--white);
    font-size: 2rem;
}

.application-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.application-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 询价表单（既有页面） */
.quote-form {
    padding: 80px 0;
    background: var(--white);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.form-header {
    text-align: center;
    margin-bottom: 3rem;
}

.form-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.form-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.quote-form-content {
    background: var(--secondary-color);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* 通用段落样式 */
.section-subtitle {
    max-width: 720px;
    margin: 0 auto 3rem;
    text-align: center;
    color: var(--text-light);
}

/* 成品展示 */
.product-gallery {
    padding: 80px 0;
    background: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.gallery-item {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.gallery-item img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.gallery-item span {
    display: block;
    padding: 1rem 1.5rem 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* 定制选项 */
.material-options {
    padding: 80px 0;
    background: var(--secondary-color);
}

.material-options h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.material-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.material-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), #4a90e2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
}

.material-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.material-card p {
    color: var(--text-light);
}

/* CTA */
.cta-banner {
    padding: 60px 0;
    background: linear-gradient(135deg, #2c5aa0 0%, #4a90e2 100%);
    color: var(--white);
}

.cta-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.cta-content .btn-primary:hover {
    background: rgba(255, 255, 255, 0.85);
}

/* 询价表单（新） */
.quote-section {
    padding: 80px 0;
    background: var(--white);
}

.quote-form-wrapper {
    max-width: 960px;
    margin: 0 auto;
    background: var(--secondary-color);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.paper-quote-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.paper-quote-form .form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.paper-quote-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.paper-quote-form label {
    font-weight: 600;
    color: var(--text-dark);
}

.paper-quote-form input,
.paper-quote-form select,
.paper-quote-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.paper-quote-form input:focus,
.paper-quote-form select:focus,
.paper-quote-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

.paper-quote-form textarea {
    resize: vertical;
    min-height: 140px;
}

.paper-quote-form .full-width {
    grid-column: 1 / -1;
}

.paper-quote-form button {
    align-self: flex-start;
    padding: 12px 36px;
}

/* 响应式设计 - 产品页面 */
@media (max-width: 768px) {
    .product-hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .product-hero-text h1 {
        font-size: 2.5rem;
    }

    .product-highlights {
        align-items: center;
    }

    .details-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features-list .feature-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .applications-grid {
        grid-template-columns: 1fr;
    }

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

    .quote-form-content {
        padding: 2rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .material-grid {
        grid-template-columns: 1fr;
    }

    .quote-form-wrapper {
        padding: 2rem;
    }

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

    .paper-quote-form button {
        width: 100%;
        text-align: center;
        align-self: stretch;
    }

    .cta-content h2 {
        font-size: 2rem;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

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

::-webkit-scrollbar-thumb:hover {
    background: #1e3a8a;
}