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

:root {
    --primary-color: #7CB342;
    --secondary-color: #9BC53D;
    --accent-color: #2E7D32;
    --text-primary: #2E5137;
    --text-secondary: #5A7860;
    --text-light: #8BA888;
    --bg-light: #F1F8E9;
    --bg-white: #ffffff;
    --border-color: #C5E1A5;
    --shadow-sm: 0 2px 8px rgba(46, 125, 50, 0.08);
    --shadow-md: 0 4px 16px rgba(46, 125, 50, 0.12);
    --shadow-lg: 0 8px 32px rgba(46, 125, 50, 0.16);
    --gradient-primary: linear-gradient(135deg, #9BC53D 0%, #7CB342 50%, #4CAF50 100%);
    --gradient-secondary: linear-gradient(135deg, #AED581 0%, #8BC34A 100%);
    --gradient-hero: linear-gradient(135deg, #81C784 0%, #66BB6A 50%, #4CAF50 100%);
    --transition: all 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

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

/* ================================
   导航栏
   ================================ */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo img {
    height: 40px;
    width: auto;
}

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

.nav-list {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 4px;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary-color);
    background-color: rgba(33, 150, 243, 0.1);
}

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

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ================================
   英雄区
   ================================ */
.hero {
    position: relative;
    padding: 100px 0;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--bg-white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

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

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

.hero-image img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

/* ================================
   按钮样式
   ================================ */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #689F38;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-white:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 16px 48px;
    font-size: 1.125rem;
}

/* ================================
   特色功能
   ================================ */
.features-overview {
    padding: 80px 0;
    background-color: var(--bg-white);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.feature-card {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 40px;
    height: 40px;
    color: var(--bg-white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ================================
   智能报告区
   ================================ */
.report-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.report-content {
    display: flex;
    align-items: center;
    gap: 80px;
}

.report-text {
    flex: 1;
}

.report-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.report-features {
    list-style: none;
    margin-bottom: 40px;
}

.report-features li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.check-icon {
    width: 24px;
    height: 24px;
    background-color: var(--secondary-color);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
}

.report-feature-text strong {
    display: block;
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.report-feature-text p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.report-image {
    flex: 1;
}

.report-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

/* ================================
   产品优势
   ================================ */
.advantages {
    padding: 80px 0;
    background-color: var(--bg-white);
}

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

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

.advantage-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.advantage-item h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.advantage-item p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ================================
   CTA区域
   ================================ */
.cta-section {
    padding: 100px 0;
    background: var(--gradient-hero);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: 20px;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

/* ================================
   页脚
   ================================ */
.footer {
    background-color: #1B5E20;
    color: var(--bg-white);
    padding: 60px 0 20px;
}

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

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* ================================
   页面标题
   ================================ */
.page-header {
    padding: 80px 0 60px;
    background: var(--gradient-hero);
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--bg-white);
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ================================
   产品页面
   ================================ */
.product-hero {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.product-showcase {
    display: flex;
    gap: 80px;
    align-items: center;
}

.product-image-section {
    flex: 1;
}

.product-main-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

.product-info-section {
    flex: 1;
}

.product-name {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.product-tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.product-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.highlight-item {
    padding: 20px;
    background-color: var(--bg-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.highlight-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.highlight-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.product-description {
    margin-bottom: 30px;
}

.product-description p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.product-cta {
    display: flex;
    gap: 20px;
}

/* 产品特性 */
.product-features {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.feature-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-detail {
    padding: 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-detail:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.feature-detail-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-detail-icon svg {
    width: 30px;
    height: 30px;
    color: var(--bg-white);
}

.feature-detail h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-detail p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 技术规格 */
.product-specs {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.spec-category {
    padding: 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.spec-category-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.spec-items {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.spec-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.spec-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ================================
   功能页面
   ================================ */
.features-detailed {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.feature-detailed-item {
    display: flex;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    padding: 50px;
    background-color: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.feature-detailed-item.reverse {
    flex-direction: row-reverse;
}

.feature-detailed-content {
    flex: 1;
}

.feature-detailed-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.feature-detailed-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.feature-detailed-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 25px;
}

.feature-detailed-list {
    list-style: none;
    margin-bottom: 25px;
}

.feature-detailed-list li {
    padding: 10px 0 10px 30px;
    position: relative;
    color: var(--text-secondary);
}

.feature-detailed-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.feature-detailed-highlight {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.highlight-tag {
    padding: 8px 16px;
    background-color: rgba(124, 179, 66, 0.15);
    color: var(--accent-color);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.feature-detailed-image {
    flex: 1;
}

.feature-detailed-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* 智能功能 */
.smart-features {
    padding: 80px 0;
    background-color: var(--bg-white);
}

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

.smart-feature-card {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.smart-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.smart-feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.smart-feature-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.smart-feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ================================
   报告页面
   ================================ */
.report-header-section {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.report-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.report-meta {
    display: flex;
    gap: 40px;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.report-meta-item {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.meta-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.user-info-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.user-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.user-info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.info-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 报告综合解读 */
.report-summary {
    padding: 0 0 30px;
}

.summary-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
}

.report-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

/* 报告分析 */
.report-analysis {
    padding: 0 0 30px;
}

.analysis-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.analysis-item {
    padding: 30px;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.analysis-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.risk-badge {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.risk-normal {
    background-color: #E8F5E9;
    color: #2E7D32;
}

.risk-warning {
    background-color: #fff3e0;
    color: #FF9800;
}

.risk-mild {
    background-color: #fff9c4;
    color: #FBC02D;
}

.analysis-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 25px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.metric-box {
    padding: 20px;
    background-color: var(--bg-white);
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.metric-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

/* 健康建议 */
.health-advice {
    margin-top: 25px;
    padding: 20px;
    background-color: var(--bg-white);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.health-advice h4 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.health-advice ul {
    list-style: none;
    padding-left: 0;
}

.health-advice li {
    padding: 8px 0 8px 25px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}

.health-advice li:before {
    content: "●";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* 睡眠评分 */
.sleep-score-section {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 30px;
}

.sleep-score-circle {
    position: relative;
    width: 200px;
    height: 200px;
}

.sleep-score-circle svg {
    transform: scaleX(-1);
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.score-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.sleep-score-info {
    flex: 1;
}

.score-desc {
    font-size: 1.125rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 15px;
}

/* 报告声明 */
.report-disclaimer {
    padding: 40px 0;
}

.disclaimer-box {
    padding: 30px;
    background-color: #fff3e0;
    border-radius: 8px;
    border-left: 4px solid #FF9800;
}

.disclaimer-box h3 {
    font-size: 1.25rem;
    color: #FF9800;
    margin-bottom: 15px;
}

.disclaimer-box p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ================================
   关于我们页面
   ================================ */
.about-intro {
    padding: 80px 0;
    background-color: var(--bg-white);
}

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

.about-text {
    flex: 1;
}

.about-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image {
    flex: 1;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* 核心价值 */
.core-values {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.value-card {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

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

.value-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.value-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.value-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 发展历程 */
.company-timeline {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 100px;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    align-items: flex-start;
}

.timeline-year {
    position: absolute;
    left: -100px;
    width: 60px;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-year:after {
    content: "";
    position: absolute;
    right: -22px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--primary-color);
    border: 4px solid var(--bg-white);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.2);
}

.timeline-content {
    padding: 25px;
    background-color: var(--bg-light);
    border-radius: 8px;
    margin-left: 40px;
    flex: 1;
}

.timeline-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.timeline-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.advantage-card {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

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

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.advantage-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.advantage-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 荣誉资质 */
.certifications {
    padding: 80px 0;
    background-color: var(--bg-white);
}

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

.cert-item {
    padding: 30px;
    background-color: var(--bg-light);
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
}

.cert-item:hover {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
}

.cert-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cert-item h4 {
    font-size: 1.125rem;
    color: var(--text-primary);
}

/* ================================
   联系我们页面
   ================================ */
.contact-info-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.contact-card {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

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

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.contact-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.contact-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

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

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

.form-header {
    text-align: center;
    margin-bottom: 40px;
}

.contact-form {
    background-color: var(--bg-light);
    padding: 40px;
    border-radius: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

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

.form-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.required {
    color: #f44336;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-white);
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-textarea {
    resize: vertical;
    font-family: inherit;
}

.form-submit {
    text-align: center;
    margin-top: 30px;
}

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

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

.promise-item {
    padding: 40px 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    text-align: center;
}

.promise-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.promise-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.promise-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 常见问题 */
.faq-section {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--bg-light);
}

.faq-question h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 25px 20px;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ================================
   响应式设计
   ================================ */
@media (max-width: 1024px) {
    .hero .container {
        gap: 40px;
    }
    
    .product-showcase,
    .report-content,
    .about-content {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero .container,
    .product-showcase,
    .report-content,
    .about-content,
    .feature-detailed-item {
        flex-direction: column;
    }
    
    .feature-detailed-item.reverse {
        flex-direction: column;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .advantages-grid,
    .smart-features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .report-meta {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .timeline {
        padding-left: 60px;
    }
    
    .timeline:before {
        left: 40px;
    }
    
    .timeline-year {
        left: -60px;
        width: 40px;
        font-size: 1rem;
    }
    
    .timeline-year:after {
        right: -14px;
    }
    
    .timeline-content {
        margin-left: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .product-cta,
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .feature-detailed-item {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .report-card,
    .contact-form {
        padding: 20px;
    }
    
    .feature-card,
    .smart-feature-card,
    .value-card,
    .advantage-card,
    .contact-card,
    .promise-item {
        padding: 30px 20px;
    }
}