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

:root {
    /* 主色调 - ccmonet.ai 风格 */
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary-color: #1d3557;
    --secondary-dark: #0f1f35;
    --accent-color: #f1faee;

    /* 中性色 */
    --text-primary: #2b2d42;
    --text-secondary: #5a5c70;
    --text-light: #8d99ae;
    --bg-white: #ffffff;
    --bg-light: #f0f2f5;
    --bg-dark: #1a1a2e;
    --bg-gray: #e5e7eb;

    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-secondary: linear-gradient(135deg, #1d3557 0%, #0f1f35 100%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* 字体 */
    --font-primary: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* 过渡 */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

html,
body {
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-gray);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

section {
    padding: var(--spacing-xl) 0;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 2000;
    transition: var(--transition);
    display: flex;
    align-items: center;
    border-bottom: none;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    background: transparent;
    mix-blend-mode: multiply;
}

.footer-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    background: transparent;
    mix-blend-mode: multiply;
}

.brand-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--font-size-lg);
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
    cursor: pointer;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(16, 185, 129, 0.1);
}

/* ===== 主页横幅 ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 50%, #d1d5db 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.15), transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.2), transparent 50%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-text {
    animation: fadeInLeft 1s ease;
    max-width: 800px;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: #2b2d42;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: #5a5c70;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #2b2d42;
    border-color: #2b2d42;
}

.btn-secondary:hover {
    background: #2b2d42;
    color: var(--bg-white);
}

.btn-block {
    width: 100%;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease;
}

.profile-image {
    width: 100%;
    max-width: 280px;
    height: auto;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: #2b2d42;
    font-size: var(--font-size-2xl);
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== 通用区块样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto var(--spacing-sm);
    border-radius: 2px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 关于我 ===== */
.about-section {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    gap: var(--spacing-lg);
}

.about-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.about-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: var(--bg-white);
}

.about-images-wrapper {
    margin: 0 auto var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    flex-direction: row;
}

.about-image-item {
    flex-shrink: 0;
    flex-grow: 0;
}

.about-profile-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.team-member-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--secondary-color);
    margin-top: var(--spacing-sm);
}

.about-card h3 {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.company-subtitle {
    display: block;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: var(--spacing-xs);
}

.about-position {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.about-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-item {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* ===== 服务内容 ===== */
.services-section {
    background: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
}

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

.service-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.service-features li i {
    color: var(--primary-color);
    margin-top: 4px;
}

.service-document {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-document {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: var(--bg-white);
    text-decoration: none;
    border-radius: 8px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-document:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.btn-document i {
    font-size: var(--font-size-base);
}

.btn-primary-link {
    background: var(--gradient-primary);
}

.btn-primary-link:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

/* ===== 核心优势 ===== */
.advantages-section {
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.advantage-item {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

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

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.2) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

.advantage-item h3 {
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.advantage-item p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 服务流程 ===== */
.process-section {
    background: var(--bg-white);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.process-item {
    text-align: center;
    position: relative;
}

.process-number {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--bg-white);
    box-shadow: var(--shadow-md);
}

.process-content h3 {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.process-content p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 联系我 ===== */
.contact-section {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info,
.contact-form-wrapper {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-info h3,
.contact-form-wrapper h3 {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.contact-item:last-of-type {
    border-bottom: none;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.2) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.contact-details p,
.contact-details a {
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
    font-weight: 600;
    text-decoration: none;
}

.contact-details a:hover {
    color: var(--primary-color);
}

.social-links {
    margin-top: var(--spacing-md);
}

.social-links h4 {
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: var(--font-size-xl);
    text-decoration: none;
    transition: var(--transition);
}

.social-icons a:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* ===== 联系表单 ===== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    transition: var(--transition);
}

.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(16, 185, 129, 0.1);
}

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

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background: rgba(72, 187, 120, 0.1);
    color: #2f855a;
    border: 1px solid rgba(72, 187, 120, 0.3);
    display: block;
}

.form-message.error {
    background: rgba(245, 101, 101, 0.1);
    color: #c53030;
    border: 1px solid rgba(245, 101, 101, 0.3);
    display: block;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 50%, #d1d5db 100%);
    color: var(--text-primary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    background: transparent;
    mix-blend-mode: multiply;
}

.footer-tagline {
    font-size: var(--font-size-base);
    opacity: 0.9;
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.footer-links ul,
.footer-services ul {
    list-style: none;
}

.footer-links li,
.footer-services li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-primary);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-services li {
    opacity: 0.8;
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
}

.footer-contact i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    opacity: 0.8;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    border: none;
    border-radius: 50%;
    font-size: var(--font-size-xl);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===== 微信二维码弹窗 ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-content h3 {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.qrcode-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    margin: 0 auto var(--spacing-sm);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.qrcode-tip {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

/* ===== 响应式设计 ===== */
@media (max-width: 968px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.35rem;
        --spacing-xl: 5rem;
        --spacing-lg: 3.5rem;
    }

    .hero-content {
        display: flex;
        justify-content: center;
        text-align: center;
    }

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

    .contact-content,
    .services-grid {
        grid-template-columns: 1fr;
        width: 100%;
        overflow-x: hidden;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .brand-text {
        font-size: var(--font-size-base);
    }

    .nav-menu {
        position: absolute;
        top: calc(100% + 15px);
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        max-width: 380px;
        background: #ffffff;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        flex-direction: column;
        gap: 5px;
        padding: 0;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        border-radius: 24px;
        max-height: 0;
        overflow: hidden;
        transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        z-index: 2001;
        border: 1px solid rgba(0, 0, 0, 0.1);
        box-sizing: border-box;
    }

    .nav-menu.active {
        max-height: 80vh;
        padding: var(--spacing-md);
        overflow-y: auto;
        transform: translateX(-50%) scale(1);
    }

    .nav-link {
        padding: 14px 20px;
        border-radius: 15px;
        width: 100%;
        text-align: center;
        display: block;
        color: var(--text-primary);
        font-weight: 500;
        font-size: 1.05rem;
        transition: all 0.2s ease;
    }

    .nav-link:hover,
    .nav-link.active {
        background: rgba(16, 185, 129, 0.08);
        color: var(--primary-color);
        font-weight: 600;
        transform: scale(0.98);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-images-wrapper {
        flex-wrap: wrap;
        left: 0 !important;
        width: 100%;
        justify-content: center;
        margin: 0 auto var(--spacing-md);
    }

    .about-profile-image {
        width: 150px;
        height: 150px;
    }

    .advantages-grid,
    .process-timeline {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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

    .contact-info,
    .contact-form-wrapper,
    .service-card,
    .advantage-item {
        padding: var(--spacing-md);
        width: 100% !important;
        max-width: calc(100vw - 32px) !important;
        box-sizing: border-box !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
        margin-left: auto;
        margin-right: auto;
        overflow-x: hidden;
    }

    .service-card img,
    .advantage-item img,
    .contact-info * {
        max-width: 100% !important;
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* ===== 打印样式 ===== */
@media print {

    .navbar,
    .hero-section,
    .back-to-top,
    .contact-form-wrapper {
        display: none;
    }
}