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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #ffffff;
    color: #111827;
    line-height: 1.6;
    overflow-x: hidden;
}

/* === 导航栏样式 === */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(6, 182, 212, 0.2);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo img {
    height: 90px;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.nav-links a {
    padding: 0.5rem 1rem;
    color: #4b5563;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    color: #22d3ee;
    background: rgba(6, 182, 212, 0.1);
}

.nav-links a.active {
    color: #22d3ee;
    background: rgba(6, 182, 212, 0.1);
}

/* Mobile Menu */
.mobile-menu-button {
    display: none;
    margin-left: auto;
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.mobile-menu-button:hover {
    background: #f3f4f6;
}

.mobile-menu-button svg {
    width: 24px;
    height: 24px;
    color: #111827;
}

#navbar .mobile-menu {
    display: none !important;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid rgba(6, 182, 212, 0.2);
    padding: 1rem;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

#navbar .mobile-menu.open {
    display: block !important;
}

#navbar .mobile-menu-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

#navbar .mobile-menu-content > a,
#navbar .mobile-nav-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: #4b5563;
    text-decoration: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.mobile-nav-item:hover {
    background: rgba(243, 244, 246, 0.8);
}

.mobile-nav-item.active {
    background: rgba(6, 182, 212, 0.1);
    color: #06b6d4;
}

.mobile-nav-sub-item {
    padding-left: 2rem;
    font-size: 0.8125rem;
    color: #6b7280;
}

.btn-primary-mobile {
    margin-top: 0.5rem;
    background: #06b6d4;
    color: white !important;
    text-align: center;
    font-weight: 600;
}

.btn-primary-mobile:hover {
    background: #0891b2;
}

.btn-primary {
    padding: 0.625rem 1.5rem;
    margin-left: 1rem;
    background: linear-gradient(to right, #06b6d4, #3b82f6);
    color: white;
    border-radius: 0.5rem;
    font-weight: bold;
    box-shadow: 0 4px 6px -1px rgba(6, 182, 212, 0.3);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(to right, #22d3ee, #60a5fa);
    transform: translateY(-1px);
}

/* === Navigation Dropdown === */
.nav-dropdown {
    position: relative;
}

.dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    color: #4b5563;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.dropdown-trigger:hover {
    color: #22d3ee;
    background: rgba(6, 182, 212, 0.1);
}

.dropdown-trigger.active {
    color: #22d3ee;
    background: rgba(6, 182, 212, 0.1);
}

.icon-chevron {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.nav-dropdown.open .icon-chevron {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    padding-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 50;
}

.nav-dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    width: 14rem;
    background: white;
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.1);
    padding: 0.5rem;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1rem;
    color: #4b5563;
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 0.25rem;
    transition: all 0.3s ease;
}

.dropdown-menu a:hover {
    color: #22d3ee;
    background: rgba(6, 182, 212, 0.1);
}

/* === Hero区域样式 === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    animation: zoomIn 1s ease-out;
}

@keyframes zoomIn {
    from {
        transform: scale(1.1);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(17, 24, 39, 0.9), rgba(17, 24, 39, 0.7), rgba(17, 24, 39, 0.9));
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    max-width: 1280px;
    width: 100%;
    padding: 0 1.5rem;
    text-align: center;
}

.hero h1 {
    font-size: 5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: linear-gradient(to right, #ffffff, #a5f3fc, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-subtitle {
    font-size: 2.25rem;
    font-weight: bold;
    color: #22d3ee;
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-desc {
    font-size: 1.25rem;
    color: white;
    margin-bottom: 3rem;
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.7s both;
}

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

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(to right, #06b6d4, #3b82f6);
    color: white;
    border-radius: 0.75rem;
    font-weight: bold;
    text-decoration: none;
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.3);
    transition: all 0.3s ease;
}

.btn-hero-primary:hover {
    background: linear-gradient(to right, #22d3ee, #60a5fa);
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(6, 182, 212, 0.4);
}

.btn-hero-outline {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    border: 2px solid #06b6d4;
    color: #22d3ee;
    border-radius: 0.75rem;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-hero-outline:hover {
    background: rgba(6, 182, 212, 0.1);
}

/* Hero轮播指示器 */
.hero-indicators {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: flex;
    gap: 0.75rem;
}

.hero-indicator {
    height: 4px;
    background: #6b7280;
    border-radius: 9999px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 2rem;
}

.hero-indicator:hover {
    background: #9ca3af;
}

.hero-indicator.active {
    background: #06b6d4;
    width: 3rem;
}

/* === Section通用样式 === */
section {
    padding: 6rem 1.5rem;
}

.section-bg-gradient {
    background: linear-gradient(to bottom, #f9fafb, #f3f4f6, #f9fafb);
}

.section-bg-dark {
    background: linear-gradient(to bottom, #0f172a, #111827, #0f172a);
}

.section-bg-gray {
    background: #f9fafb;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-title {
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
}

.section-title-gradient {
    background: linear-gradient(to right, #111827, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title-white {
    color: white;
}

.section-desc {
    text-align: center;
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 4rem;
}

/* === 公司优势卡片 === */
.strengths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.strength-card {
    background: rgba(243, 244, 246, 0.8);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid rgba(6, 182, 212, 0.2);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.strength-card.visible {
    animation: fadeInUp 0.6s ease-out both;
}

.strength-card:hover {
    border-color: #06b6d4;
    transform: translateY(-8px);
    box-shadow: 0 10px 25px rgba(6, 182, 212, 0.15);
}

.strength-icon {
    width: 3rem;
    height: 3rem;
    color: #22d3ee;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.strength-card:hover .strength-icon {
    transform: scale(1.1);
}

.strength-stat {
    font-size: 1.875rem;
    font-weight: bold;
    color: #22d3ee;
    margin-bottom: 0.5rem;
}

.strength-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #111827;
    margin-bottom: 0.5rem;
}

.strength-desc {
    color: #6b7280;
}

/* === 产品轮播 === */
.product-carousel {
    position: relative;
    height: 600px;
    border-radius: 1.5rem;
    overflow: hidden;
}

.product-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.5s ease;
    pointer-events: none;
}

.product-slide.active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.product-slide.exit {
    opacity: 0;
    transform: translateX(-100px);
}

.product-link {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
    text-decoration: none;
}

.product-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

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

.product-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, #0f172a, rgba(15, 23, 42, 0.5), transparent);
}

.product-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.product-inner {
    max-width: 48rem;
    text-align: center;
    margin: 0 auto;
}

.product-badge {
    background: #06b6d4;
    color: #111827;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: bold;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.product-title {
    font-size: 3rem;
    font-weight: bold;
    color: white;
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.product-link:hover .product-title {
    color: #22d3ee;
}

.product-desc {
    font-size: 1.25rem;
    color: #9ca3af;
}

/* 产品轮播控制按钮 */
.carousel-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border: none;
    padding: 1rem;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #111827;
}

.carousel-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.carousel-button-prev {
    left: 1.5rem;
}

.carousel-button-next {
    right: 1.5rem;
}

/* 产品轮播指示器 */
.product-indicators {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 0.75rem;
}

.product-indicator {
    height: 8px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 8px;
}

.product-indicator:hover {
    background: rgba(255, 255, 255, 0.5);
}

.product-indicator.active {
    background: #22d3ee;
    width: 3rem;
}

/* === 技术优势卡片 === */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-card {
    text-align: center;
    background: rgba(249, 250, 251, 0.8);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.tech-card.visible {
    animation: fadeInUp 0.6s ease-out both;
}

.tech-card:hover {
    border-color: rgba(6, 182, 212, 0.5);
    transform: translateY(-4px);
}

.tech-icon {
    width: 4rem;
    height: 4rem;
    color: #22d3ee;
    margin: 0 auto 1.5rem;
}

.tech-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #111827;
    margin-bottom: 0.75rem;
}

.tech-desc {
    color: #6b7280;
    line-height: 1.8;
}

/* === 应用领域网格 === */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.application-card {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    aspect-ratio: 4/3;
    transition: all 0.3s ease;
    opacity: 0;
    transform: scale(0.9);
}

.application-card.visible {
    animation: fadeInScale 0.6s ease-out both;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.application-card:hover {
    border-color: #06b6d4;
    transform: scale(1.02);
    box-shadow: 0 10px 25px rgba(6, 182, 212, 0.15);
}

.application-link {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
}

.application-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.application-card:hover .application-image {
    transform: scale(1.1);
}

.application-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, #0f172a, rgba(15, 23, 42, 0.5), transparent);
}

.application-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.application-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #111827;
    text-align: center;
    background: rgba(249, 250, 251, 0.6);
    backdrop-filter: blur(4px);
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    transition: color 0.3s ease;
}

.application-card:hover .application-title {
    color: #22d3ee;
}

/* === CTA区域 === */
.cta-section {
    background: linear-gradient(to right, #0891b2, #3b82f6);
    padding: 6rem 1.5rem;
}

.cta-container {
    max-width: 56rem;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: 3rem;
    font-weight: bold;
    color: white;
    margin-bottom: 1.5rem;
}

.cta-desc {
    font-size: 1.25rem;
    color: #ecfeff;
    margin-bottom: 3rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-cta-white {
    padding: 1rem 2rem;
    background: white;
    color: #0891b2;
    border-radius: 0.75rem;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-cta-white:hover {
    background: #f3f4f6;
    transform: translateY(-2px);
}

.btn-cta-outline {
    padding: 1rem 2rem;
    border: 2px solid white;
    color: #111827;
    border-radius: 0.75rem;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-cta-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* === 公司介绍区域 === */
.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: center;
}

.intro-image {
    border-radius: 1rem;
    overflow: hidden;
    opacity: 0;
    transform: translateX(-20px);
}

.intro-image.visible {
    animation: fadeInLeft 0.8s ease-out both;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.intro-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.intro-text {
    color: #BFBFBF;
    line-height: 1.8;
    opacity: 0;
    transform: translateX(20px);
}

.intro-text.visible {
    animation: fadeInRight 0.8s ease-out both;
}

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

/* === 客户卡片 === */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.client-card {
    background: rgba(249, 250, 251, 0.8);
    border: 1px solid #e5e7eb;
    padding: 1.5rem;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.client-card.visible {
    animation: fadeInUp 0.6s ease-out both;
}

.client-card:hover {
    border-color: #06b6d4;
}

.client-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.client-logo {
    flex-shrink: 0;
    width: 6rem;
    height: 3rem;
    background: white;
    border-radius: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.client-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.client-name {
    font-size: 1.125rem;
    font-weight: bold;
    color: #4b5563;
    transition: color 0.3s ease;
}

.client-card:hover .client-name {
    color: #22d3ee;
}

/* === 新闻卡片 === */
.news-grid a {
    text-decoration: none;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.news-card {
    background: rgba(249, 250, 251, 0.8);
    border-radius: 1rem;
    border: 1px solid #e5e7eb;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.news-card.visible {
    animation: fadeInUp 0.6s ease-out both;
}

.news-card:hover {
    border-color: #06b6d4;
    transform: translateY(-4px);
}

.news-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: #f3f4f6;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.1);
}

.news-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(17, 24, 39, 0.5), transparent);
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.news-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #111827;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.3s ease;
}

.news-card:hover .news-title {
    color: #22d3ee;
}

.news-excerpt {
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === 定制服务区域 === */
.custom-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 4rem;
    align-items: center;
}

.custom-features {
    opacity: 0;
    transform: translateX(-20px);
}

.custom-features.visible {
    animation: fadeInLeft 0.8s ease-out both;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #22d3ee;
    flex-shrink: 0;
}

.feature-text {
    color: #4b5563;
}

.custom-form-wrapper {
    background: rgba(243, 244, 246, 0.8);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 1px solid rgba(6, 182, 212, 0.2);
    opacity: 0;
    transform: translateX(20px);
}

.custom-form-wrapper.visible {
    animation: fadeInRight 0.8s ease-out both;
}

.form-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: #111827;
    margin-bottom: 0.5rem;
}

.form-subtitle {
    color: #6b7280;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    background: rgba(249, 250, 251, 0.5);
    color: #111827;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #06b6d4;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-textarea {
    resize: none;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: linear-gradient(to right, #06b6d4, #3b82f6);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 10px 15px -3px rgba(6, 182, 212, 0.3);
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: linear-gradient(to right, #22d3ee, #60a5fa);
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(6, 182, 212, 0.4);
}

/* === Footer === */
footer {
    background: #f3f4f6;
    color: #6b7280;
    border-top: 1px solid rgba(6, 182, 212, 0.1);
    padding: 4rem 1.5rem 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr;
    gap: 10rem;
    margin-bottom: 3rem;
}

.footer-title {
    font-weight: bold;
    color: #111827;
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    color: #6b7280;
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #22d3ee;
}

.footer-bottom {
    border-top: 1px solid #d1d5db;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.qr-codes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 24rem;
    margin-top: 1.5rem;
}

.qr-code {
    text-align: center;
}

.qr-code-img {
    width: 5rem;
    height: 5rem;
    background: #d1d5db;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.qr-code-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-code-label {
    font-size: 0.75rem;
    color: #6b7280;
}

/* === 图标SVG === */
.icon {
    display: inline-block;
    width: 1.25em;
    height: 1.25em;
    vertical-align: middle;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .nav-container {
        justify-content: flex-start !important;
    }
    .mobile-lang-switcher {
        display: block;
        margin-left: auto;
        margin-right: 0.5rem;
    }
    .nav-links {
        display: none;
    }
    .mobile-menu-button {
        display: block;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

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

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

    .nav-links {
        display: none;
    }

    .mobile-menu-button {
        display: block;
    }

    .product-carousel {
        height: 400px;
    }

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

    .custom-grid,
    .intro-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .applications-grid {
        grid-template-columns: 1fr;
    }
}

/* === 实用类 === */
.py-15 {
    padding-top: 6rem;
    padding-bottom: 6rem;
}