/* Global Styles */
:root {
    --primary-color: #1a5f9c;
    --secondary-color: #00a8cc;
    --accent-color: #f1c40f;
    --light-color: #f8f9fa;
    --dark-color: #2f3b4b;
    --gray-color: #a0a9b2;
    --text-color: #333;
    --container-width: 1200px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    scroll-behavior: smooth;
    overscroll-behavior: none; /* 防止过度滚动效果 */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 15px auto;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: var(--gray-color);
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.primary-btn:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
    color: white;
}

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

.secondary-btn:hover {
    background-color: var(--primary-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
    color: white;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0);
    transition: all 0.3s ease;
    z-index: 1000;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
}

.navbar {
    padding: 25px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 10px 0;
}

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

.logo a {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

header.scrolled .logo a {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    text-shadow: none;
}

.nav-links ul {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 600;
    color: #fff;
    position: relative;
    padding: 5px 0;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
}

header.scrolled .nav-links a {
    color: var(--dark-color);
    text-shadow: none;
}

header.scrolled .nav-links a:hover, 
header.scrolled .nav-links a.active {
    color: var(--secondary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    border-radius: 3px;
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

.language-selector {
    display: flex;
    gap: 10px;
}

.language-selector button {
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: #fff;
    transition: var(--transition);
    padding: 5px 10px;
    border-radius: 20px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

header.scrolled .language-selector button {
    color: var(--gray-color);
    text-shadow: none;
}

.language-selector button.active {
    color: var(--secondary-color);
    background-color: rgba(0, 168, 204, 0.1);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 30px;
    height: 3px;
    background-color: #fff;
    margin: 6px 0;
    transition: var(--transition);
}

header.scrolled .hamburger span {
    background-color: var(--dark-color);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3)), url('../images/bg.png') no-repeat center center/cover;
    color: #fff;
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 120px 0 80px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.hero .primary-btn {
    background: var(--accent-color);
    color: var(--dark-color);
    font-weight: 700;
}

.hero .primary-btn:hover {
    background: #f8d030;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
    color: var(--dark-color);
}

.hero .secondary-btn {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid white;
}

.hero .secondary-btn:hover {
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
    color: var(--primary-color);
}

/* Services Section */
.services {
    padding: 100px 0;
    background-color: var(--light-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background-color: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
    border-top: 4px solid transparent;
    position: relative;
    padding-bottom: 30px;
    cursor: pointer;
}

.service-card.active {
    border-top: 4px solid var(--accent-color);
    background-color: rgba(0, 168, 204, 0.05);
}

.service-card.active::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-top: 15px solid rgba(0, 168, 204, 0.05);
    z-index: 5;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-top: 4px solid var(--secondary-color);
}

.service-card.active:hover {
    border-top: 4px solid var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 35px;
    border-radius: 50%;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

.service-card p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

.service-link {
    color: var(--secondary-color);
    font-weight: 600;
    position: relative;
}

.service-link::after {
    content: '→';
    margin-left: 5px;
    transition: var(--transition);
}

.service-link:hover::after {
    margin-left: 10px;
}

.service-link.toggle-details {
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    display: inline-block;
    color: var(--secondary-color);
    position: relative;
    padding: 0;
    margin-bottom: 0;
}

.service-link.toggle-details::after {
    content: '→';
    margin-left: 5px;
    transition: var(--transition);
}

.service-link.toggle-details:hover::after {
    margin-left: 10px;
}

.service-link.toggle-details.active::after {
    content: '↑';
    margin-left: 5px;
}

.service-details-container {
    position: relative;
    margin-top: 50px;
    border-radius: 12px;
    overflow: hidden;
    background-color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.service-details-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 15px solid var(--primary-color);
    margin-top: -15px;
    z-index: 5;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-details-container.patent-active::before {
    opacity: 1;
    left: calc(12.5% + 15px);
}

.service-details-container.trademark-active::before {
    opacity: 1;
    left: calc(37.5% + 15px);
}

.service-details-container.audit-active::before {
    opacity: 1;
    left: calc(62.5% + 15px);
}

.service-details-container.international-active::before {
    opacity: 1;
    left: calc(87.5% + 15px);
}

.service-details-wrapper {
    display: none;
    width: 100%;
}

.service-details-wrapper.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-details-header {
    display: flex;
    align-items: center;
    padding: 20px 30px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    position: relative;
}

.details-icon {
    width: 50px;
    height: 50px;
    background-color: white;
    color: var(--primary-color);
    font-size: 25px;
    border-radius: 50%;
    margin-right: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-details-header h3 {
    font-size: 1.5rem;
    margin: 0;
}

.close-details {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close-details:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.details-content {
    padding: 30px;
    text-align: left;
}

.details-content h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin: 25px 0 15px;
}

.details-content p {
    margin-bottom: 20px;
    color: var(--text-color);
    line-height: 1.7;
}

.details-content ul {
    margin-left: 20px;
    margin-bottom: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 10px 30px;
}

.details-content li {
    margin-bottom: 8px;
    position: relative;
    list-style-type: none;
    padding-left: 25px;
}

.details-content li::before {
    content: '•';
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.2rem;
}

.service-cta {
    text-align: center;
    margin-top: 60px;
    padding: 40px;
    background: linear-gradient(135deg, rgba(26, 95, 156, 0.05), rgba(0, 168, 204, 0.1));
    border-radius: 12px;
}

.service-cta p {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 500;
}

/* About Section */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: 60px;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.about-text h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-color);
}

.about-text ul {
    margin-left: 20px;
    margin-bottom: 30px;
}

.about-text li {
    margin-bottom: 10px;
    position: relative;
}

.about-text li::before {
    content: '✓';
    color: var(--secondary-color);
    margin-right: 10px;
    font-weight: bold;
}

.about-image img {
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.about-image:hover img {
    transform: scale(1.03);
}

/* Testimonials Section */
.testimonials {
    padding: 70px 0 40px;
    background-color: var(--light-color);
    position: relative;
    overflow: hidden;
    margin-bottom: -20px;
}

.testimonials::before {
    content: '"';
    position: absolute;
    top: 50px;
    left: 50px;
    font-size: 200px;
    color: rgba(0, 168, 204, 0.05);
    font-family: Georgia, serif;
    line-height: 1;
}

/* Carousel Container */
.testimonials-carousel-container {
    position: relative;
    padding: 30px 20px 10px;
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Carousel */
.testimonials-carousel {
    display: flex;
    flex-wrap: nowrap;
    position: relative;
    width: 85%;
    height: 380px;
    margin: 0 auto;
    overflow: hidden;
}

/* Testimonial Cards */
.testimonial-card {
    position: absolute;
    width: 100%;
    max-width: 400px;
    height: auto;
    transition: all 0.5s ease;
    opacity: 0;
    transform: scale(0.8) translateX(100%);
    visibility: hidden;
}

.testimonial-card[data-position="-2"] {
    opacity: 0.3;
    transform: scale(0.7) translateX(-150%);
    z-index: 1;
    visibility: visible;
}

.testimonial-card[data-position="-1"] {
    opacity: 0.6;
    transform: scale(0.8) translateX(-75%);
    z-index: 2;
    visibility: visible;
}

.testimonial-card[data-position="0"] {
    opacity: 1;
    transform: scale(1) translateX(0);
    z-index: 5;
    visibility: visible;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 0;
}

.testimonial-card[data-position="1"] {
    opacity: 0.6;
    transform: scale(0.8) translateX(75%);
    z-index: 2;
    visibility: visible;
}

.testimonial-card[data-position="2"] {
    opacity: 0.3;
    transform: scale(0.7) translateX(150%);
    z-index: 1;
    visibility: visible;
}

.testimonial-content {
    background-color: white;
    border-radius: 12px;
    padding: 30px 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    transition: var(--transition);
    border-left: 4px solid var(--accent-color);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.testimonial-card[data-position="0"] .testimonial-content {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.quote {
    color: rgba(241, 196, 15, 0.2);
    font-size: 80px;
    line-height: 1;
    position: absolute;
    top: 20px;
    left: 20px;
}

.testimonial-text {
    margin-bottom: 15px;
    font-style: italic;
    color: var(--text-color);
    position: relative;
    z-index: 1;
    flex-grow: 1;
}

.testimonial-author-info {
    display: flex;
    align-items: center;
    margin-top: auto;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding-top: 12px;
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 24px;
}

.testimonial-author-details {
    flex: 1;
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.testimonial-position {
    font-size: 0.9rem;
    color: var(--gray-color);
}

/* Carousel Controls */
.carousel-arrow {
    background: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    z-index: 10;
}

.carousel-arrow:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.carousel-arrow:focus {
    outline: none;
}

/* Indicators */
.testimonial-indicators {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 0;
    margin-bottom: 0;
    position: relative;
    z-index: 20;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background-color: var(--secondary-color);
    width: 25px;
    border-radius: 4px;
}

@media (max-width: 992px) {
    .testimonials-carousel {
        height: 450px;
    }
    
    .testimonial-card[data-position="-2"],
    .testimonial-card[data-position="2"] {
        visibility: hidden;
    }
    
    .testimonials-carousel-container {
        padding: 20px 10px 5px;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .testimonials-carousel {
        height: 460px;
        width: 95%;
        touch-action: pan-y;
    }
    
    .testimonial-card {
        max-width: 100%;
    }
    
    .testimonial-card[data-position="-1"],
    .testimonial-card[data-position="1"] {
        display: none;
    }
    
    .testimonial-card[data-position="0"] {
        transform: scale(1);
        opacity: 1;
        width: 90%;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .testimonial-content {
        padding: 20px 15px;
    }
    
    .carousel-arrow {
        width: 36px;
        height: 36px;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .carousel-prev {
        left: -5px;
    }
    
    .carousel-next {
        right: -5px;
    }
    
    .quote {
        font-size: 60px;
        top: 10px;
        left: 10px;
    }
    
    .testimonial-author-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .testimonial-avatar {
        margin-bottom: 10px;
    }
    
    .testimonial-indicators {
        margin-top: 0;
        position: relative;
        top: -5px;
    }
    
    .testimonials-carousel-container {
        padding: 15px 5px;
    }
}

@media (max-width: 480px) {
    .testimonials {
        padding: 50px 0 30px;
        margin-bottom: -15px;
    }
    
    .testimonials-carousel {
        height: 500px;
    }
    
    .testimonial-card[data-position="0"] {
        width: 100%;
    }
    
    .testimonial-content {
        padding: 15px 12px;
    }
    
    .carousel-arrow {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .indicator {
        width: 8px;
        height: 8px;
    }
    
    .indicator.active {
        width: 24px;
    }
    
    .testimonial-indicators {
        margin-top: 0;
        position: relative;
        top: -10px;
    }
    
    .testimonials-carousel-container {
        padding: 10px 0;
    }
}

/* 添加触摸样式支持 */
.testimonials-carousel {
    touch-action: pan-y;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

/* Contact Section - New Design */
.contact {
    padding: 60px 0 100px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(248, 249, 250, 0.9));
    background-size: cover;
    background-attachment: fixed;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 60px;
}

.contact-info-panel, .contact-form-panel {
    background-color: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-info-panel:hover, .contact-form-panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.contact-info-header, .contact-form-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px 30px;
    font-size: 1.5rem;
    font-weight: 600;
}

.contact-info-item {
    display: flex;
    padding: 25px 30px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 20px;
    border-radius: 50%;
    margin-right: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-details {
    flex: 1;
}

.contact-details h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.contact-details p, .contact-details a {
    color: var(--text-color);
    margin-bottom: 5px;
}

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

.contact-social {
    padding: 25px 30px;
}

.contact-social h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 40px;
    height: 40px;
    background-color: var(--light-color);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transform: translateY(-3px);
}

/* Contact Form Styles */
.contact-form {
    padding: 30px;
}

.form-info-text {
    font-size: 0.95rem;
    color: var(--gray-color);
    margin-bottom: 20px;
    text-align: right;
    font-style: italic;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group label::after {
    content: ' *';
    color: var(--secondary-color);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 168, 204, 0.1);
    outline: none;
}

.form-group input:required, .form-group textarea:required {
    border-left: 3px solid var(--secondary-color);
}

.form-group button {
    margin-top: 10px;
    width: 100%;
}

/* Map Container Styles */
.contact-map-container {
    background-color: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.map-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 30px;
    font-size: 1.5rem;
    font-weight: 600;
}

.contact-map {
    height: 400px;
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

@media (max-width: 992px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Footer */
.modern-footer {
    background: linear-gradient(135deg, #202842, #1a5f9c);
    color: #fff;
    padding: 0;
    position: relative;
}

.footer-top {
    padding: 70px 0 50px;
}

.footer-main-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-brand .footer-logo a {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff, var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    margin-bottom: 20px;
    display: inline-block;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 25px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.social-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transition: all 0.3s ease;
}

.social-circle:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    color: #fff;
}

.footer-navigation {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-links h3, .footer-contact h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

.footer-links h3::after, .footer-contact h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 3px;
}

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

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    position: relative;
    padding-left: 0;
    display: inline-block;
}

.footer-links a:hover {
    color: #fff;
    transform: translateX(5px);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.contact-item i {
    color: var(--secondary-color);
    margin-right: 15px;
    margin-top: 5px;
}

.contact-item div {
    display: flex;
    flex-direction: column;
}

.contact-item a, .contact-item p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

.contact-item a:hover {
    color: #fff;
}

.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, rgba(255,255,255,0.01), rgba(255,255,255,0.2), rgba(255,255,255,0.01));
    margin: 0 auto;
    width: 100%;
}

.footer-bottom {
    padding: 25px 0;
    position: relative;
}

.footer-bottom .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0 0 15px 0;
    font-size: 0.9rem;
    text-align: center;
}

.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    z-index: 999;
}

.back-to-top a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: var(--secondary-color);
    color: #fff;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.back-to-top a:hover {
    background: #fff;
    color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.back-to-top a:active {
    background: var(--secondary-color);
    color: #fff;
    transform: translateY(0);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.back-to-top a:focus {
    background: var(--secondary-color);
    color: #fff;
}

@media (max-width: 992px) {
    .footer-main-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .back-to-top {
        bottom: 65px;
    }
}

@media (max-width: 768px) {
    .footer-navigation {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-top {
        padding: 50px 0 30px;
    }
    
    .back-to-top {
        right: 20px;
        bottom: 20px;
    }
    
    /* 确保移动端的回到顶部按钮颜色交互与PC端一致 */
    .back-to-top a:hover,
    .back-to-top a:active,
    .back-to-top a:focus {
        background: #fff;
        color: var(--secondary-color);
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    }
    
    /* 添加触摸支持 */
    .back-to-top a:active {
        background: var(--secondary-color);
        color: #fff;
        transform: translateY(0);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    }
}

@media (max-width: 480px) {
    .footer-bottom .container {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .back-to-top {
        right: 20px;
        bottom: 20px;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .about-content, .contact-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

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

@media (max-width: 768px) {
    .nav-links, .language-selector {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    .nav-links.active {
        display: block;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: rgba(47, 59, 75, 0.95);
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
    }

    .nav-links.active ul {
        flex-direction: column;
    }

    .nav-links.active li {
        margin: 15px 0;
    }

    header.scrolled .nav-links.active {
        background-color: white;
    }

    .nav-links.active a {
        color: #fff;
        text-shadow: none;
    }

    header.scrolled .nav-links.active a {
        color: var(--dark-color);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .service-card.active::after {
        display: none;
    }

    .hover-hint::before {
        content: '\f0a9';
    }
    
    .hover-hint::after {
        content: '(tap)';
        margin-left: 5px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .services-grid, .testimonials-slider, .contact-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1200px) {
    .service-details-container.patent-active::before,
    .service-details-container.trademark-active::before,
    .service-details-container.audit-active::before,
    .service-details-container.international-active::before {
        left: 50%;
    }
}

.hover-hint {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin-top: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.hover-hint::before {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-right: 5px;
    font-size: 0.9rem;
}

.service-card:hover .hover-hint {
    color: var(--secondary-color);
}

.service-card.active .hover-hint {
    opacity: 0;
}

/* 修改整个testimonials部分与后面内容的间距 */
.testimonials + section,
.contact {
    padding-top: 70px;
}

@media (max-width: 992px) {
    .testimonials-carousel-container {
        padding: 20px 10px;
    }
}

@media (max-width: 768px) {
    .testimonials-carousel-container {
        padding: 15px 5px;
    }
}

@media (max-width: 480px) {
    .testimonials-carousel-container {
        padding: 10px 0;
    }
}

/* 为移动端服务详情添加新样式 */
.mobile-details-container {
    width: 100%;
    margin-bottom: 30px;
    animation: fadeIn 0.5s ease;
}

.mobile-details-container .service-details-wrapper {
    display: block;
    width: 100%;
    border-radius: 0 0 12px 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.mobile-details-container .service-details-wrapper.active {
    display: block;
}

/* 修改服务卡片在移动端的样式 */
@media (max-width: 768px) {
    .service-card.active {
        border-radius: 12px 12px 0 0;
        margin-bottom: 0;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        transform: translateY(0) !important;
    }
    
    .service-card.active::after {
        display: none;
    }
    
    .mobile-details-container .service-details-wrapper {
        border-top: none;
        background-color: rgba(0, 168, 204, 0.05);
    }
    
    .mobile-details-container .service-details-header {
        border-radius: 0;
    }
    
    .service-details-container {
        display: none;
    }
    
    .service-card {
        cursor: pointer;
    }
    
    /* 改进网格布局在移动端的表现 */
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* 平板设备的样式调整 */
@media (min-width: 769px) and (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.mobile-language-selector {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.mobile-language-selector button {
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: #fff;
    transition: var(--transition);
    padding: 8px 15px;
    border-radius: 20px;
    margin: 0 5px;
}

header.scrolled .mobile-language-selector {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

header.scrolled .mobile-language-selector button {
    color: var(--gray-color);
}

.mobile-language-selector button.active {
    background-color: var(--accent-color);
    color: var(--dark-color);
}

header.scrolled .mobile-language-selector button.active {
    background-color: var(--primary-color);
    color: white;
}

/* 添加触摸悬停效果 */
.back-to-top a.touch-hover {
    background: #fff;
    color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* 确保触摸事件良好支持 */
.back-to-top a {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* 修复移动端点击后按钮颜色问题 */
@media (max-width: 768px) {
    .back-to-top a:link,
    .back-to-top a:visited,
    .back-to-top a:focus,
    .back-to-top a:active {
        background: var(--secondary-color);
        color: #fff;
    }
    
    /* 仅在显式添加touch-hover类时应用悬停样式 */
    .back-to-top a.touch-hover {
        background: #fff;
        color: var(--secondary-color);
    }
    
    /* 点击激活状态 */
    .back-to-top a:active {
        background: var(--secondary-color);
        color: #fff;
        transform: translateY(0);
    }
}