/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Microsoft YaHei", "微软雅黑";
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    padding: 15px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-right: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: white;
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 12px;
    color: rgba(255,255,255,0.9);
}

.nav-menu {
    display: flex;
    gap: 30px;
    flex: 1;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.nav-link.active {
    background: rgba(0,0,0,0.2);
    border-bottom: 2px solid white;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.5;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(255,107,53,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255,107,53,0.4);
}

.btn-secondary {
    background: white;
    color: #ff6b35;
    border: 2px solid #ff6b35;
}

.btn-secondary:hover {
    background: #ff6b35;
    color: white;
    transform: translateY(-3px);
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
    margin-bottom: 40px;
}

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

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

/* Section 样式 */
.content-section {
    padding: 60px 20px;
    background: white;
    margin-bottom: 20px;
    border-radius: 8px;
}

.section-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
    text-align: center;
}

.section-intro {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
    font-size: 16px;
}

/* 栅格系统 */
.grid {
    display: grid;
    gap: 30px;
    margin-top: 30px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* 卡片 */
.card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ff6b35;
}

/* 高亮框 */
.highlight-box {
    background: #fff3f0;
    border-left: 4px solid #ff6b35;
    padding: 25px;
    border-radius: 6px;
    margin: 30px 0;
}

.highlight-box h3 {
    color: #ff6b35;
    margin-bottom: 15px;
}

/* 对比表格 */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
    background: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-radius: 8px;
    overflow: hidden;
}

.comparison-table thead {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.comparison-table tbody tr:hover {
    background: #f8f9fa;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #ff6b35;
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: 50px;
    position: relative;
    width: 45%;
}

.timeline-item:nth-child(even) {
    margin-left: auto;
    text-align: right;
}

.timeline-marker {
    position: absolute;
    top: 0;
    width: 40px;
    height: 40px;
    background: #ff6b35;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.timeline-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.timeline-item p {
    color: #666;
    line-height: 1.6;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: auto;
    right: 50%;
    transform: translateX(50%);
}

/* FAQ */
.faq-list {
    margin-top: 30px;
}

.faq-item {
    background: white;
    border: 1px solid #eee;
    border-radius: 6px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    background: #f8f9fa;
    padding: 20px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    display: block;
    user-select: none;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #efefef;
}

.faq-answer {
    padding: 20px;
    color: #666;
    display: none;
    line-height: 1.8;
}

.faq-item:hover .faq-answer {
    display: block;
}

.faq-item:hover .faq-question {
    background: #fff3f0;
    color: #ff6b35;
}

.faq-detailed {
    margin-top: 30px;
}

.faq-item-detailed {
    background: white;
    padding: 25px;
    border-radius: 6px;
    border-left: 4px solid #ff6b35;
    margin-bottom: 20px;
}

.faq-item-detailed h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

/* 服务卡片 */
.service-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

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

.service-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.6;
}

/* CTA 部分 */
.cta {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 8px;
    margin: 20px;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-section {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 8px;
    margin: 20px;
}

.cta-section h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.95;
}

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

/* 页脚 */
.footer {
    background: #222;
    color: #ccc;
    padding: 50px 20px 20px;
}

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

.footer-section h4 {
    color: white;
    margin-bottom: 15px;
}

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

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ff6b35;
}

.footer-section p {
    line-height: 1.8;
    font-size: 14px;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
    color: #999;
    font-size: 14px;
}

/* 步骤卡片 */
.step-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.step-number {
    display: inline-block;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 15px;
}

.step-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.step-card ul {
    text-align: left;
    list-style-position: inside;
    color: #666;
    font-size: 14px;
}

.step-card li {
    margin-bottom: 8px;
}

/* 设备卡片 */
.equipment-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-top: 4px solid #ff6b35;
}

.equipment-card h3 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.equipment-card ul {
    list-style: none;
    margin-top: 15px;
}

.equipment-card li {
    padding: 8px 0;
    color: #666;
    border-bottom: 1px solid #eee;
}

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

/* 表单 */
.contact-form {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    max-width: 600px;
    margin: 30px auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #ff6b35;
    box-shadow: 0 0 0 3px rgba(255,107,53,0.1);
}

.form-note {
    text-align: center;
    color: #666;
    margin-top: 15px;
}

/* 特征框 */
.feature-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.feature-box h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.feature {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-top: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.feature h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.feature p {
    color: #666;
    font-size: 14px;
}

/* 方法卡片 */
.method-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.method-card h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.method-card p {
    color: #666;
    line-height: 1.6;
}

/* 技术卡片 */
.technique-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.technique-card h3 {
    color: #ff6b35;
    margin-bottom: 10px;
}

/* 旋转网格 */
.rotation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.rotation-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
}

.rotation-item h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

/* 观察网格 */
.observation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.obs-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
}

.obs-item h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.obs-item p {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

/* 错误列表 */
.error-list,
.mistake-list {
    margin-top: 30px;
}

.error-item,
.mistake-item {
    background: white;
    padding: 25px;
    border-radius: 6px;
    border-left: 4px solid #ff6b35;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.error-item h3,
.mistake-item h3 {
    color: #ff6b35;
    margin-bottom: 10px;
    font-size: 18px;
}

.error-item p,
.mistake-item p {
    margin-bottom: 10px;
    color: #666;
    line-height: 1.6;
}

/* 比较详细 */
.comparison-detailed {
    margin-top: 30px;
}

.compare-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.compare-item h3 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.compare-item p {
    color: #666;
    margin-bottom: 8px;
    line-height: 1.6;
}

/* 教练卡片 */
.coach-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.coach-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.coach-avatar {
    font-size: 64px;
    margin-bottom: 15px;
}

.coach-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.coach-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 成就网格 */
.achievement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.achievement {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(255,107,53,0.2);
}

.achievement .number {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 10px;
}

.achievement p {
    font-size: 16px;
    opacity: 0.95;
}

/* 方案框 */
.scheme-box {
    background: white;
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
    margin-bottom: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.scheme-box p {
    margin-bottom: 10px;
    color: #666;
    line-height: 1.6;
}

.scheme-box strong {
    color: #ff6b35;
}

/* 品牌卡片 */
.brand-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-top: 4px solid #ff6b35;
}

.brand-card h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.brand-card p {
    color: #666;
    font-size: 14px;
    margin-bottom: 10px;
}

.brand-card ul {
    list-style-position: inside;
    color: #666;
    font-size: 14px;
}

.brand-card li {
    margin-bottom: 5px;
}

/* 材质框 */
.material-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.material-box h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.material-box p {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    line-height: 1.6;
}

/* 厚度框 */
.thickness-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.thickness-box h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.thickness-box p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 选项框 */
.option-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.option-box h4 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.option-box ul {
    list-style: none;
}

.option-box li {
    margin-bottom: 8px;
    color: #666;
    padding-left: 20px;
    position: relative;
}

.option-box li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #ff6b35;
    font-weight: bold;
}

/* 橡皮类型 */
.rubber-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.rubber-item {
    background: white;
    padding: 25px;
    border-radius: 8px;
    border-top: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.rubber-item h4 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.rubber-item p {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    line-height: 1.6;
}

.rubber-item ul {
    list-style-position: inside;
    color: #666;
    font-size: 14px;
}

.rubber-item li {
    margin-bottom: 6px;
}

/* 拨号类型 */
.paddle-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.paddle-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.paddle-item h3 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.paddle-item p {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    line-height: 1.6;
}

/* 联系项 */
.contact-item {
    background: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

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

.contact-item h3 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.contact-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 关注项 */
.follow-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.follow-item h3 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.follow-item p {
    color: #666;
    font-size: 14px;
}

/* 时间线案例 */
.timeline-case {
    margin-top: 30px;
}

.timeline-case-item {
    background: white;
    padding: 25px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid #ff6b35;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.timeline-case-item h4 {
    color: #ff6b35;
    margin-bottom: 10px;
}

.timeline-case-item p {
    color: #666;
    line-height: 1.6;
}

/* 地址信息 */
.address-info {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.address-info h3 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.address-info h4 {
    color: #333;
    margin-top: 20px;
    margin-bottom: 10px;
}

.address-info p {
    color: #666;
    margin-bottom: 8px;
}

.address-info ul {
    list-style-position: inside;
    color: #666;
}

.address-info li {
    margin-bottom: 8px;
}

/* 提示框 */
.tip-box {
    padding: 20px;
    background: #fff3f0;
    border-left: 4px solid #ff6b35;
    border-radius: 6px;
    margin: 25px 0;
}

.tip-box p {
    color: #333;
    line-height: 1.8;
}

.tip-box strong {
    color: #ff6b35;
}

.tip-box a {
    color: #ff6b35;
    text-decoration: none;
    font-weight: 600;
}

.tip-box a:hover {
    text-decoration: underline;
}

/* 案例总结 */
.case-summary {
    padding: 25px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #ff6b35;
}

.case-summary p {
    color: #333;
    line-height: 1.8;
}

/* Step卡片图片容器 */
.step-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 8px 8px 0 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 对比版本视觉容器 */
.comparison-visual {
    margin: 30px 0 40px 0;
    padding: 30px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    overflow: hidden;
}

.comparison-img {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    display: block;
    height: auto;
}

/* 优化间距 - 减少padding和margin */
.content-section {
    padding: 50px 20px !important;
    margin-bottom: 10px !important;
}

.section-title {
    margin-bottom: 8px !important;
}

.section-intro {
    margin-bottom: 25px !important;
}

.grid {
    gap: 20px !important;
    margin-top: 20px !important;
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)) !important;
}

.step-card {
    padding: 0 !important;
    border: none !important;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    background: white;
}

.step-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.step-card h3 {
    padding: 0 15px;
    margin-bottom: 0;
    padding-top: 15px;
}

.step-card ul {
    padding: 0 15px 15px 15px;
    margin: 10px 0 0 0;
}

.step-number {
    padding: 8px 15px;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    color: white;
    font-weight: bold;
    font-size: 13px;
    margin: 0;
}

/* 页面内容图片容器 */
.rotation-visual-section,
.prep-image-section,
.receive-image-section,
.equipment-image-section,
.team-image-section,
.contact-image-section {
    margin: 25px 0 30px 0;
    padding: 25px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rotation-visual-img,
.prep-image,
.receive-image,
.equipment-image,
.team-image,
.contact-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

/* Hero 图片覆盖层 */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* 图文混排 - 概念部分 */
.concept-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 40px;
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.concept-img {
    overflow: hidden;
    border-radius: 8px;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 350px;
}

.concept-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.concept-image:hover {
    transform: scale(1.05);
}

.concept-content {
    padding: 20px;
}

.concept-content h3 {
    font-size: 24px;
    color: #ff6b35;
    margin-bottom: 20px;
}

.concept-content p {
    color: #333;
    line-height: 1.8;
    font-size: 15px;
}

/* 图片容器通用样式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.image-container {
    overflow: hidden;
    border-radius: 8px;
    background: #f8f9fa;
}

.image-container img {
    width: 100%;
    height: auto;
    display: block;
}

/* 图文并茂的卡片 */
.card-with-image {
    overflow: hidden;
    border-radius: 8px;
    background: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.card-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: #f8f9fa;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.card-content {
    padding: 25px;
}

.card-content h3 {
    color: #ff6b35;
    margin-bottom: 15px;
    font-size: 18px;
}

.card-content p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
    .nav-menu {
        flex-wrap: wrap;
        gap: 15px;
    }

    .hero-title {
        font-size: 36px;
    }

    .section-title {
        font-size: 28px;
    }

    .concept-section {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 30px;
    }

    .concept-img {
        min-height: 300px;
    }
}

/* 响应式设计 - 手机 */
@media (max-width: 768px) {
    body {
        font-size: 15px;
        line-height: 1.5;
    }

    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .logo {
        margin-right: 0;
        text-align: center;
    }

    .logo-text {
        font-size: 20px;
    }

    .nav-menu {
        gap: 8px;
        font-size: 12px;
    }

    .nav-link {
        padding: 6px 10px;
    }

    .hero {
        padding: 60px 15px;
    }

    .hero-title {
        font-size: 28px;
        margin-bottom: 15px;
    }

    .hero-subtitle {
        font-size: 14px;
        margin-bottom: 25px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
        padding: 12px 20px;
        font-size: 14px;
    }

    .page-header {
        padding: 40px 15px;
    }

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

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

    .content-section {
        padding: 40px 15px;
    }

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

    .section-intro {
        font-size: 14px;
    }

    .grid {
        gap: 15px;
    }

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

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

    .concept-section {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    .concept-img {
        min-height: 250px;
    }

    .card-image {
        height: 200px;
    }

    .card,
    .service-card,
    .step-card,
    .coach-card,
    .brand-card,
    .technique-card,
    .equipment-card,
    .method-card,
    .feature-box,
    .material-box,
    .option-box,
    .rubber-item,
    .paddle-item {
        padding: 20px;
    }

    .card h3,
    .service-card h3,
    .step-card h3,
    .coach-card h3 {
        font-size: 16px;
    }

    .card p,
    .service-card p,
    .step-card p,
    .coach-card p {
        font-size: 13px;
    }

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

    .comparison-table th,
    .comparison-table td {
        padding: 12px;
    }

    .timeline {
        padding: 20px 0;
    }

    .timeline::before {
        left: 15px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        text-align: left;
        padding-left: 50px;
    }

    .timeline-marker,
    .timeline-item:nth-child(even) .timeline-marker {
        left: -5px;
        right: auto;
        transform: translateX(-50%);
        width: 30px;
        height: 30px;
        font-size: 14px;
    }

    .timeline-item h3 {
        font-size: 16px;
    }

    .timeline-item p {
        font-size: 13px;
    }

    .faq-item {
        margin-bottom: 12px;
    }

    .faq-question {
        padding: 15px;
        font-size: 13px;
    }

    .faq-answer {
        padding: 15px;
        font-size: 13px;
    }

    .contact-form {
        padding: 20px;
    }

    .form-group {
        margin-bottom: 15px;
    }

    .form-group label {
        font-size: 13px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px;
        font-size: 14px;
    }

    .cta {
        padding: 40px 15px;
    }

    .cta h2 {
        font-size: 22px;
    }

    .cta p {
        font-size: 14px;
    }

    .cta-section {
        padding: 40px 15px;
        margin: 15px;
    }

    .cta-section h2 {
        font-size: 22px;
    }

    .cta-section p {
        font-size: 14px;
    }

    .footer {
        padding: 30px 15px 15px;
    }

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

    .footer-section h4 {
        font-size: 16px;
    }

    .footer-section p {
        font-size: 13px;
    }

    .tip-box {
        padding: 15px;
        margin: 20px 0;
    }

    .tip-box p {
        font-size: 13px;
    }

    .case-summary {
        padding: 20px;
    }

    .case-summary p {
        font-size: 13px;
    }

    .achievement {
        padding: 20px;
    }

    .achievement .number {
        font-size: 32px;
    }

    .achievement p {
        font-size: 13px;
    }

    /* 隐藏返回顶部按钮在小屏幕上的位置 */
    .back-to-top {
        bottom: 20px !important;
        right: 20px !important;
        width: 45px !important;
        height: 45px !important;
    }
}

/* 超小屏幕 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 13px;
    }

    .section-title {
        font-size: 20px;
    }

    .page-header h1 {
        font-size: 20px;
    }

    .timeline-marker {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .timeline-item {
        padding-left: 45px;
    }

    .timeline::before {
        left: 10px;
    }

    .concept-img {
        min-height: 200px;
    }

    .card-image {
        height: 150px;
    }

    .concept-content {
        padding: 15px;
    }

    .concept-content h3 {
        font-size: 18px;
    }

    .concept-content p {
        font-size: 13px;
    }

    .step-image {
        height: 150px;
    }

    .rotation-visual-section,
    .prep-image-section,
    .receive-image-section,
    .equipment-image-section,
    .team-image-section {
        margin: 15px 0 20px 0;
        padding: 15px;
    }

    .comparison-visual {
        margin: 20px 0 30px 0;
        padding: 15px;
    }
}