/* 页面头部 */
.page-header {
    background: var(--bg-light);
    color: var(--text-color);
    padding: 120px 0 80px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-color);
}

.page-header p {
    font-size: 20px;
    color: var(--text-secondary);
}

/* 产品页面样式 */
.product-intro {
    padding: 80px 0;
    background: var(--bg-white);
}

.intro-content {
    display: flex;
    gap: 60px;
    align-items: center;
    margin-top: 40px;
}

.intro-text {
    flex: 1;
}

.intro-text h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.intro-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

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

.feature-list li {
    padding: 12px 0;
    font-size: 16px;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.intro-image {
    flex: 1;
    text-align: center;
}

.intro-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.image-caption {
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
}

/* 产品对比表 */
.product-comparison {
    padding: 80px 0;
    background: var(--bg-light);
}

.comparison-table {
    margin-top: 40px;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--secondary-color);
    color: white;
    font-weight: 600;
    font-size: 16px;
}

.comparison-table td:first-child {
    background: var(--bg-light);
    font-weight: 600;
    text-align: left;
}

.comparison-table tbody tr:hover {
    background: var(--bg-light);
}

.comparison-note {
    margin-top: 30px;
    padding: 20px 30px;
    background: rgba(69, 162, 158, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.comparison-note p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.comparison-note strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 规格参数 */
.product-specs {
    padding: 80px 0;
    background: var(--bg-white);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.spec-category {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 12px;
}

.spec-category h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.spec-category ul {
    list-style: none;
}

.spec-category li {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 15px;
}

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

/* 可选模块 */
.optional-modules {
    padding: 80px 0;
    background: var(--bg-light);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.module-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.module-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.module-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.module-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.module-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

.module-card ul {
    list-style: none;
    text-align: left;
}

.module-card li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.module-card li:last-child {
    border-bottom: none;
}

/* 解决方案页面 */
.aluminum-types {
    padding: 80px 0;
    background: var(--bg-white);
}

.types-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.type-card {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
    border-top: 5px solid var(--primary-color);
}

.type-card.casting {
    border-top-color: #3a3a3a;
}

.type-card.wrought {
    border-top-color: #5a5a5a;
}

.type-card h3 {
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
}

.type-content h4 {
    font-size: 18px;
    margin: 20px 0 10px;
    color: var(--primary-color);
}

.type-content ul {
    list-style: none;
    margin-bottom: 20px;
}

.type-content li {
    padding: 8px 0 8px 20px;
    position: relative;
    font-size: 15px;
}

.type-content li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.price-range {
    font-size: 20px;
    font-weight: 600;
    color: var(--success-color);
}

/* 技术优势 */
.sorting-technology {
    margin-top: 80px;
    padding: 60px;
    background: var(--bg-light);
    border-radius: 20px;
}

.sorting-technology h3 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
}

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

.tech-item {
    position: relative;
    padding-left: 60px;
}

.tech-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.tech-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
}

.tech-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 分选等级 */
.sorting-grades {
    padding: 80px 0;
    background: var(--bg-light);
}

.grades-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.grade-level {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.grade-level.featured {
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.15);
}

.grade-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--success-color);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.grade-level h3 {
    font-size: 28px;
    margin-bottom: 10px;
    text-align: center;
}

.grade-desc {
    text-align: center;
    margin-bottom: 30px;
    opacity: 0.8;
}

.categories {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 20px 0;
}

.category {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-light);
    border-radius: 8px;
}

.grade-level.featured .category {
    background: rgba(255, 255, 255, 0.2);
}

.category-icon {
    font-size: 20px;
}

.grade-specs {
    margin: 20px 0;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.grade-level.featured .grade-specs {
    border-color: rgba(255, 255, 255, 0.3);
}

.grade-specs p {
    margin: 8px 0;
    font-size: 15px;
}

.grade-benefits h5 {
    font-size: 16px;
    margin: 20px 0 10px;
}

.grade-benefits ul {
    list-style: none;
}

.grade-benefits li {
    padding: 8px 0;
    font-size: 14px;
}

/* 行业应用 */
.industry-applications {
    padding: 80px 0;
    background: var(--bg-white);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.application-card {
    background: var(--bg-light);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s;
}

.application-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.application-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.application-content {
    padding: 30px;
}

.application-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.application-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 案例页面 */
.cases-showcase {
    padding: 60px 0;
}

.case-item {
    display: flex;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    padding-bottom: 80px;
    border-bottom: 2px solid var(--border-color);
}

.case-item:last-child {
    border-bottom: none;
}

.case-item.reverse {
    flex-direction: row-reverse;
}

.case-image {
    flex: 1;
    text-align: center;
}

.case-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.case-content {
    flex: 1;
}

.case-tag {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 15px;
}

.case-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.case-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
}

.case-info span {
    font-size: 14px;
}

.case-description h4 {
    font-size: 18px;
    margin: 20px 0 10px;
    color: var(--primary-color);
}

.case-description p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.effect-list {
    list-style: none;
    margin: 15px 0;
}

.effect-list li {
    padding: 10px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border-color);
}

.customer-quote {
    margin-top: 30px;
    padding: 25px;
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    font-style: italic;
    color: var(--text-secondary);
}

.customer-quote cite {
    display: block;
    margin-top: 15px;
    font-style: normal;
    font-weight: 600;
    color: var(--text-color);
}

/* 统计数据 */
.statistics-section {
    padding: 80px 0;
    background: var(--secondary-color);
    color: white;
}

.statistics-section .section-title {
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

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

.stat-number {
    font-size: 56px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

/* 客户评价 */
.testimonials {
    padding: 80px 0;
    background: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.testimonial-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.stars {
    font-size: 20px;
    color: #ffd700;
    margin-bottom: 20px;
}

.testimonial-card p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.testimonial-author strong {
    display: block;
    font-size: 16px;
    margin-bottom: 5px;
}

.testimonial-author span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 关于我们页面 */
.company-intro {
    padding: 80px 0;
}

.intro-layout {
    display: flex;
    gap: 60px;
    align-items: center;
}

.intro-text .lead {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 20px;
}

.intro-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 企业价值观 */
.company-values {
    padding: 80px 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.value-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s;
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.value-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.value-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.value-card p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 发展历程 */
.company-timeline {
    padding: 80px 0;
}

.timeline {
    max-width: 800px;
    margin: 60px auto 0;
    position: relative;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 60px;
    position: relative;
}

.timeline-year {
    width: 80px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
}

.timeline-year::after {
    content: "";
    position: absolute;
    left: 80px;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translateX(-5px);
}

.timeline-content {
    background: var(--bg-light);
    padding: 25px 30px;
    border-radius: 12px;
    flex: 1;
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 团队 */
.team-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.team-member {
    background: white;
    padding: 30px;
    border-radius: 16px;
    text-align: center;
}

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
}

.team-member h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.position {
    font-size: 15px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.bio {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 研发实力 */
.rd-strength {
    padding: 80px 0;
}

.strength-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 60px;
    margin-top: 60px;
}

.strength-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-box {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.stat-num {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-text {
    font-size: 16px;
    color: var(--text-secondary);
}

.strength-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

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

.advantage-list li {
    padding: 12px 0;
    font-size: 15px;
    line-height: 1.6;
    border-bottom: 1px solid var(--border-color);
}

/* 资质荣誉 */
.honors-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.honor-item {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
}

.honor-icon {
    font-size: 56px;
    margin-bottom: 15px;
}

.honor-item h4 {
    font-size: 18px;
}

/* 联系我们页面 */
.contact-info-section {
    padding: 60px 0;
}

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

.contact-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
}

.contact-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.contact-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 5px 0;
}

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

.form-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-top: 40px;
}

.form-intro h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.form-intro > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.form-benefits {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.benefit-icon {
    width: 24px;
    height: 24px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.form-container {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

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

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-group label {
    font-weight: normal;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-large {
    width: 100%;
    padding: 16px 32px;
    font-size: 18px;
}

.form-note {
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 15px;
}

/* 报价区域 */
.quote-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.quote-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin: 60px 0 40px;
    flex-wrap: wrap;
}

.quote-step {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.step-num {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    margin: 0 auto 15px;
}

.quote-step h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.quote-step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.quote-arrow {
    font-size: 32px;
    color: var(--primary-color);
}

.quote-form {
    max-width: 1000px;
    margin: 0 auto;
}

.quote-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 15px;
}

.quote-form input {
    padding: 14px 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
}

/* 地图 */
.map-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.map-container {
    margin: 40px 0;
}

.map-placeholder {
    width: 100%;
    height: 400px;
    background: #e0e0e0;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--text-secondary);
}

.map-note {
    font-size: 14px;
    margin-top: 10px;
    opacity: 0.7;
}

.map-info {
    margin-top: 40px;
}

.map-info h3 {
    font-size: 28px;
    margin-bottom: 30px;
}

.transport-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.transport-item {
    background: white;
    padding: 25px;
    border-radius: 12px;
}

.transport-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 10px;
}

.transport-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 服务承诺 */
.service-promise {
    padding: 80px 0;
    background: var(--bg-white);
}

.promise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.promise-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: 16px;
}

.promise-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.promise-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
}

.promise-item p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA区域 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* 了解铝回收页面 */
.recycling-benefits {
    padding: 80px 0;
    background: var(--bg-light);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.benefit-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.15);
}

.benefit-icon {
    font-size: 56px;
    margin-bottom: 20px;
    display: block;
}

.benefit-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-color);
}

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

.benefit-card strong {
    color: var(--primary-color);
    font-size: 18px;
}

.recycling-process {
    padding: 80px 0;
    background: white;
}

.process-timeline {
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.process-step {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(69, 162, 158, 0.3);
}

.step-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.step-content p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.aluminum-types {
    padding: 80px 0;
    background: var(--bg-light);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.type-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.type-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.type-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.type-card p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.type-badge {
    display: inline-block;
    padding: 6px 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.aluminum-comparison {
    padding: 80px 0;
    background: white;
}

.comparison-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.comparison-card {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.comparison-header {
    padding: 30px;
    color: white;
    text-align: center;
}

.comparison-header.casting {
    background: linear-gradient(135deg, #3a3a3a, #1a1a1a);
}

.comparison-header.wrought {
    background: linear-gradient(135deg, #5a5a5a, #2a2a2a);
}

.comparison-header h3 {
    font-size: 24px;
    margin: 0;
}

.comparison-body {
    padding: 30px;
}

.comparison-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.comparison-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.comparison-item strong {
    display: block;
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.comparison-item p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.comparison-note {
    margin-top: 40px;
    padding: 25px;
    background: rgba(69, 162, 158, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.comparison-note p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.comparison-note strong {
    color: #e67e22;
    font-weight: 600;
}

.industry-data {
    padding: 80px 0;
    background: var(--bg-light);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.data-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.data-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.data-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.data-label {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 15px;
}

.data-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.solution-cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.solution-cta .container {
    max-width: 900px;
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 25px;
    color: white;
}

.cta-content > p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
}

.cta-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.cta-benefit-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
}

.cta-benefit-item .benefit-icon {
    font-size: 20px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 40px;
}

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

.cta-buttons .btn-primary:hover {
    background: var(--bg-light);
}

.cta-buttons .btn-outline {
    border-color: white;
    color: white;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .intro-content,
    .intro-layout,
    .strength-layout {
        flex-direction: column;
    }

    .case-item,
    .case-item.reverse {
        flex-direction: column;
    }

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

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

    .types-comparison,
    .grades-container,
    .applications-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .comparison-table {
        font-size: 13px;
    }

    .timeline::before {
        left: 60px;
    }

    .timeline-year {
        width: 60px;
        font-size: 18px;
    }

    .timeline-year::after {
        left: 60px;
    }

    /* 了解铝回收页面响应式 */
    .benefits-grid,
    .types-grid,
    .data-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .comparison-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .process-step {
        flex-direction: column;
        gap: 15px;
    }

    .step-number {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .cta-benefits {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
    }

    .solution-cta {
        padding: 60px 0;
    }

    .cta-content h2 {
        font-size: 28px;
    }

    .cta-content > p {
        font-size: 16px;
    }
}