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

:root {
    --primary-color: #2c5f9e;
    --secondary-color: #1a3a5c;
    --accent-color: #ff6b35;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* 顶部通知栏 */
.top-notice {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 12px 20px;
    text-align: center;
    position: relative;
    font-size: 14px;
}

.top-notice p {
    margin: 0;
}

.close-notice {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.3s;
}

.close-notice:hover {
    background: rgba(255,255,255,0.3);
}

/* 导航栏 */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
}

.logo h2 {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 3px;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-light);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s;
    position: relative;
}

.nav-menu li a:not(.btn-primary):hover {
    color: var(--primary-color);
}

.nav-menu li a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

.nav-menu li a:not(.btn-primary):hover::after {
    width: 100%;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 25px;
    border-radius: 25px;
    transition: all 0.3s;
}

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

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

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-btn.active span {
    background: var(--primary-color);
}

/* 移动端菜单遮罩层 */
.menu-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(2px);
}

.menu-backdrop.active {
    opacity: 1;
    visibility: visible;
}

/* 英雄区 */
.hero {
    min-height: 600px;
    height: 100vh;
    max-height: 800px;
    background: linear-gradient(135deg, rgba(44, 95, 158, 0.85), rgba(26, 58, 92, 0.85)),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="1200" height="600" fill="%232c5f9e"/><rect width="1200" height="600" fill="url(%23grid)"/></svg>');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: var(--white);
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.25);
    backdrop-filter: blur(0.5px);
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

.highlight {
    color: var(--accent-color);
    position: relative;
}

.hero-divider {
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    margin: 30px auto;
}

.hero-subtitle {
    font-size: 20px;
    margin: 10px 0;
    font-weight: 300;
}

.hero-cta {
    font-size: 24px;
    font-weight: 600;
    margin-top: 20px;
    color: var(--accent-color);
}

/* 重要性区块 */
.importance-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
    line-height: 1.6;
}

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

.expert-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.expert-card h3 {
    color: var(--primary-color);
    font-size: 22px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent-color);
}

.expert-card ul {
    list-style: none;
}

.expert-card ul li {
    margin: 12px 0;
    color: var(--text-dark);
    font-size: 15px;
    line-height: 1.6;
}

/* 服务项目 */
.services-section {
    padding: 80px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
    background: var(--white);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(44, 95, 158, 0.1), transparent);
    transition: left 0.5s;
}

.service-card:hover::before {
    left: 100%;
}

.service-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.service-card h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* 关于我们 */
.about-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 25px;
    margin-top: 50px;
}

.feature-card {
    background: var(--white);
    padding: 35px 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

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

.feature-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.1;
    margin-bottom: 10px;
}

.feature-card h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 15px;
    line-height: 1.4;
}

.feature-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
}

/* 适用场景 */
.scenarios-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.scenarios-section .section-title,
.scenarios-section .section-subtitle {
    color: var(--white);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.scenario-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s;
}

.scenario-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.scenario-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.scenario-card h3 {
    font-size: 16px;
    font-weight: 500;
}

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

/* 客户评价轮播 */
.reviews-carousel {
    position: relative;
    max-width: 900px;
    margin: 50px auto 0;
    overflow: hidden;
    padding: 0 60px;
}

.reviews-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.reviews-carousel .review-card {
    min-width: 100%;
    flex-shrink: 0;
    padding: 40px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.carousel-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
    left: 0;
}

.carousel-btn.next {
    right: 0;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.carousel-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dots .dot.active {
    background: var(--primary-color);
    width: 30px;
    border-radius: 6px;
}

.carousel-dots .dot:hover {
    background: var(--accent-color);
}

.review-card {
    background: var(--white);
    padding: 35px 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

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

.review-stars {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ffc107;
}

.review-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-style: italic;
}

.review-author {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 600;
}

/* 税务信息 */
.tax-info-section {
    padding: 80px 0;
    background: var(--white);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.info-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.info-card:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.info-image {
    font-size: 60px;
    margin-bottom: 20px;
}

.info-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
    transition: color 0.3s;
}

.info-card:hover h3 {
    color: var(--white);
}

.info-card p {
    color: var(--text-light);
    font-size: 14px;
    transition: color 0.3s;
}

.info-card:hover p {
    color: rgba(255,255,255,0.9);
}

/* 原则说明 */
.principles-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.principles-list {
    max-width: 900px;
    margin: 50px auto 0;
}

.principle-item {
    background: var(--white);
    padding: 35px 40px;
    border-radius: 10px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 30px;
    align-items: flex-start;
    transition: all 0.3s;
}

.principle-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-hover);
}

.principle-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 60px;
}

.principle-item h3 {
    color: var(--primary-color);
    font-size: 22px;
    margin-bottom: 10px;
}

.principle-item p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

/* 联系表单 */
.contact-section {
    padding: 80px 0 100px;
    background: var(--bg-light);
}

.contact-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 50px;
}

.form-container-full {
    max-width: 800px;
    width: 100%;
    background: var(--white);
    border-radius: 0;
    padding: 50px 60px;
    box-shadow: none;
    border: none;
}

/* 表单容器 */
.form-container {
    padding: 0;
}

.contact-form {
    max-width: 100%;
    margin: 0;
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    margin-bottom: 12px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 15px;
}

.form-group > label {
    display: block;
    margin-bottom: 12px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 15px;
}

.form-group input[type="tel"],
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    font-size: 15px;
    transition: all 0.2s ease;
    font-family: inherit;
    background: var(--white);
}

.form-group input[type="tel"]:hover,
.form-group select:hover {
    border-color: #999;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L2 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-color: var(--white);
    padding-right: 36px;
}

.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    font-size: 15px;
    transition: all 0.2s ease;
    font-family: inherit;
    background: var(--white);
    resize: vertical;
    min-height: 150px;
    line-height: 1.6;
}

.form-group textarea:hover {
    border-color: #999;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #666;
    background: var(--white);
    box-shadow: none;
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error,
.checkbox-group.error {
    border-color: #f44336;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.checkbox-group,
.checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 30px;
    padding: 0;
    background: transparent;
    border-radius: 0;
    border: none;
}

.checkbox-group label,
.checkbox-grid label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 400;
    font-size: 15px;
    cursor: pointer;
    padding: 0;
    border-radius: 0;
    transition: none;
    background: transparent;
    border: none;
    user-select: none;
    color: var(--text-dark);
}

.checkbox-group label:hover,
.checkbox-grid label:hover {
    background: transparent;
    border-color: transparent;
}

.checkbox-group label:has(input:checked),
.checkbox-grid label:has(input:checked) {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
}

.checkbox-group input[type="checkbox"],
.checkbox-grid input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    flex-shrink: 0;
    accent-color: #555;
    margin: 0;
    border: 1px solid #d0d0d0;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: #4a4a4a;
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 20px;
    box-shadow: none;
}

.btn-submit:hover {
    background: #333;
    transform: none;
    box-shadow: none;
}

.btn-submit:active {
    transform: none;
    box-shadow: none;
    background: #2a2a2a;
}

/* 页脚 */
.footer {
    background: #2a2a2a;
    color: rgba(255, 255, 255, 0.8);
    padding: 30px 0;
    text-align: center;
}

.footer-bottom {
    padding: 0;
    margin: 0;
    border: none;
    text-align: center;
    font-size: 13px;
    opacity: 0.8;
}

.privacy-link {
    color: var(--white);
    text-decoration: none;
    margin-left: 20px;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.privacy-link:hover {
    opacity: 1;
    text-decoration: underline;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-hover);
    transition: all 0.3s;
    z-index: 999;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}

.back-to-top.show {
    display: flex;
}

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

/* 滚动动画类 */
.service-card.animated,
.feature-card.animated,
.scenario-card.animated,
.review-card.animated,
.info-card.animated,
.expert-card.animated,
.principle-item.animated {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

/* 响应式设计 - 平板和手机 */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }
    
    .services-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 响应式设计 - 手机和平板 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    /* 导航栏移动端 */
    .nav-container {
        min-height: 70px;
        padding: 0 15px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 80px 0 30px;
        gap: 0;
        transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
        overflow-y: auto;
        z-index: 1000;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .nav-menu li a {
        display: block;
        padding: 18px 25px;
        font-size: 16px;
        color: var(--text-dark);
        transition: all 0.3s ease;
    }
    
    .nav-menu li a:hover {
        background: var(--bg-light);
        padding-left: 30px;
        color: var(--primary-color);
    }
    
    .nav-menu li a.btn-primary {
        text-align: center;
        border-radius: 8px;
    }
    
    .mobile-menu-btn {
        display: flex;
        z-index: 1001;
    }
    
    .logo h2 {
        font-size: 20px;
    }
    
    .logo-subtitle {
        font-size: 11px;
    }
    
    /* 英雄区移动端 */
    .hero {
        min-height: 500px;
        height: 70vh;
        max-height: 600px;
        background-attachment: scroll;
    }
    
    .hero-title {
        font-size: 32px;
        line-height: 1.2;
        padding: 0 20px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        padding: 0 20px;
    }
    
    .hero-cta {
        font-size: 20px;
    }
    
    .hero-divider {
        width: 50px;
        margin: 20px auto;
    }
    
    /* 区块标题移动端 */
    .section-title {
        font-size: 28px;
        padding: 0 10px;
        line-height: 1.3;
    }
    
    .section-subtitle {
        font-size: 16px;
        padding: 0 10px;
    }
    
    /* 网格布局移动端 - 单列 */
    .services-grid,
    .features-grid,
    .scenarios-grid,
    .info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .expert-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* 轮播移动端 */
    .reviews-carousel {
        padding: 0 50px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    /* 卡片移动端 */
    .service-card,
    .feature-card,
    .scenario-card,
    .review-card,
    .info-card {
        padding: 30px 20px;
    }
    
    .service-icon,
    .info-image {
        font-size: 50px;
    }
    
    /* 联系区域移动端 */
    .contact-wrapper {
        margin-top: 30px;
    }
    
    .contact-section {
        padding: 50px 0 80px;
    }
    
    .contact-wrapper {
        margin-top: 40px;
    }
    
    .form-container-full {
        padding: 40px 30px;
        border-radius: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 0;
    }
    
    .form-row .form-group {
        margin-bottom: 25px;
    }
    
    /* 表单移动端 */
    .contact-form {
        padding: 0;
        margin-top: 0;
    }
    
    .form-group {
        margin-bottom: 25px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* 防止iOS自动缩放 */
        padding: 12px 14px;
    }
    
    .checkbox-group,
    .checkbox-grid {
        gap: 15px 20px;
    }
    
    .checkbox-group label,
    .checkbox-grid label {
        font-size: 14px;
    }
    
    .btn-submit {
        padding: 15px;
        font-size: 16px;
        margin-top: 10px;
    }
    
    /* 原则说明移动端 */
    .principle-item {
        flex-direction: column;
        gap: 15px;
        padding: 25px 20px;
    }
    
    .principle-number {
        font-size: 40px;
    }
    
    /* 页脚移动端 */
    .footer {
        padding: 25px 0;
    }
    
    .footer-bottom {
        font-size: 12px;
    }
    
    .privacy-link {
        display: block;
        margin: 10px 0 0 0;
    }
    
    /* 返回顶部按钮移动端 */
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 20px;
    }
    
    /* 顶部通知栏移动端 */
    .top-notice {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    .close-notice {
        right: 10px;
        padding: 4px 12px;
        font-size: 11px;
    }
    
    .top-notice p {
        padding-right: 80px;
    }
}

/* 响应式设计 - 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        min-height: 60px;
        padding: 0 10px;
    }
    
    .nav-menu {
        top: 60px;
        height: calc(100vh - 60px);
        padding: 20px 15px;
    }
    
    .logo h2 {
        font-size: 18px;
    }
    
    .logo-subtitle {
        font-size: 10px;
    }
    
    .hero {
        min-height: 400px;
        height: 60vh;
        max-height: 500px;
    }
    
    .hero-title {
        font-size: 24px;
        padding: 0 15px;
    }
    
    .hero-subtitle {
        font-size: 14px;
        padding: 0 15px;
    }
    
    .hero-cta {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 24px;
        padding: 0 5px;
    }
    
    .section-subtitle {
        font-size: 14px;
        padding: 0 5px;
    }
    
    .importance-section,
    .services-section,
    .about-section,
    .scenarios-section,
    .reviews-section,
    .tax-info-section,
    .principles-section,
    .contact-section {
        padding: 50px 0;
    }
    
    .service-card,
    .feature-card,
    .scenario-card,
    .review-card,
    .info-card,
    .expert-card {
        padding: 25px 15px;
    }
    
    .service-icon,
    .info-image {
        font-size: 45px;
    }
    
    .form-container {
        padding: 25px 15px;
    }
    
    .map-container {
        min-height: 350px;
    }
    
    .principle-item {
        padding: 20px 15px;
    }
    
    .principle-number {
        font-size: 36px;
    }
    
    .top-notice {
        font-size: 12px;
        padding: 8px 10px;
    }
    
    .close-notice {
        right: 5px;
        padding: 3px 10px;
        font-size: 10px;
    }
}

/* 响应式设计 - 横屏手机 */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        height: 100vh;
        min-height: 500px;
    }
    
    .nav-menu {
        height: calc(100vh - 70px);
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .service-card:hover,
    .feature-card:hover,
    .scenario-card:hover,
    .review-card:hover,
    .info-card:hover {
        transform: none;
    }
    
    .btn-primary:active,
    .btn-submit:active {
        transform: scale(0.98);
    }
}

/* APK 下载浮动按钮 */
.apk-download-btn {
    position: fixed;
    bottom: 100px;
    right: 30px;
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    padding: 15px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
    z-index: 999;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.apk-download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
    background: linear-gradient(135deg, #45a049, #4CAF50);
}

.apk-download-btn:active {
    transform: translateY(-1px);
}

/* 导航栏下载按钮样式 */
.nav-menu .btn-download {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white !important;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-menu .btn-download:hover {
    background: linear-gradient(135deg, #45a049, #4CAF50);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .apk-download-btn {
        bottom: 80px;
        right: 20px;
        padding: 12px 20px;
        font-size: 14px;
    }
}

/* 平板端响应式 (768px - 1200px) */
@media (max-width: 1200px) and (min-width: 769px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px 20px;
    }
    
    .feature-number {
        font-size: 40px;
    }
}

/* 小屏幕平板 (600px - 768px) */
@media (max-width: 768px) and (min-width: 601px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}