/* CSS变量定义 */
:root {
    --primary-dark: #0a1628;
    --primary-blue: #1a365d;
    --accent-blue: #4a90d9;
    --highlight-blue: #64b5f6;
    --light-blue: #e3f2fd;
    --white: #ffffff;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-600: #718096;
    --gray-800: #2d3748;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;

    --font-heading: 'Playfair Display', 'Noto Sans SC', serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;

    --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.08);
    --shadow-md: 0 4px 20px rgba(10, 22, 40, 0.12);
    --shadow-lg: 0 8px 40px rgba(10, 22, 40, 0.16);
    --shadow-glow: 0 0 30px rgba(74, 144, 217, 0.3);
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    color: var(--white);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-dark);
}

.btn-outline-dark {
    background: transparent;
    color: var(--primary-dark);
    border-color: var(--accent-blue);
}

.btn-outline-dark:hover {
    background: var(--accent-blue);
    color: var(--white);
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding: 4px 0;
}

.nav-links a.active {
    color: var(--white);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--highlight-blue);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--highlight-blue);
    transition: width var(--transition-normal);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-fast);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 50%, #0d47a1 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(100, 181, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(74, 144, 217, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(10, 22, 40, 0.8) 0%, transparent 70%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
}

.hero-title {
    margin-bottom: 24px;
}

.hero-title-main {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 700;
    color: var(--white);
    letter-spacing: 4px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-title-sub {
    display: block;
    font-size: clamp(18px, 3vw, 28px);
    font-weight: 300;
    color: var(--highlight-blue);
    margin-top: 16px;
    letter-spacing: 8px;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255, 255, 255, 0.4);
    border-bottom: 2px solid rgba(255, 255, 255, 0.4);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.6; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

/* 入场动画 */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

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

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--highlight-blue));
    margin: 0 auto;
    border-radius: 2px;
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    padding: 120px 0 80px;
    text-align: center;
}

.page-title {
    font-family: var(--font-heading);
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.page-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

/* 公司简介 */
.intro {
    background: var(--gray-100);
}

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

.intro-title {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.intro-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.intro-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--accent-blue);
    transition: gap var(--transition-fast);
}

.intro-link:hover {
    gap: 12px;
}

.intro-link svg {
    width: 18px;
    height: 18px;
}

.intro-stats {
    display: flex;
    gap: 32px;
}

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

.stat-number {
    font-family: var(--font-heading);
    font-size: 40px;
    font-weight: 700;
    color: var(--accent-blue);
    line-height: 1;
}

.stat-unit {
    font-size: 20px;
    color: var(--accent-blue);
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* 首页服务 */
.services-home {
    background: var(--primary-dark);
    position: relative;
    overflow: hidden;
}

.services-home::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 10% 90%, rgba(74, 144, 217, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 10%, rgba(100, 181, 246, 0.08) 0%, transparent 40%);
}

.services-home .section-title {
    color: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.service-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), var(--shadow-glow);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    color: var(--highlight-blue);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.service-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* 首页案例 */
.cases-home {
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.case-card {
    position: relative;
    height: 280px;
    border-radius: 16px;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    z-index: 0;
}

.case-overlay {
    position: absolute;
    inset: 0;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    background: linear-gradient(to top, rgba(10, 22, 40, 0.95) 0%, rgba(10, 22, 40, 0.6) 50%, transparent 100%);
    transition: all var(--transition-normal);
}

.case-card:hover .case-overlay {
    background: linear-gradient(to top, rgba(10, 22, 40, 0.98) 0%, rgba(10, 22, 40, 0.8) 100%);
}

.case-category {
    display: inline-block;
    padding: 6px 12px;
    background: var(--accent-blue);
    color: var(--white);
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    margin-bottom: 12px;
    width: fit-content;
}

.case-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--white);
}

.cases-more {
    text-align: center;
}

/* CTA区域 */
.cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    text-align: center;
    padding: 100px 0;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
}

/* 关于我们页面 */
.about-intro {
    padding: 80px 0;
}

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

.about-text h2 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-highlights {
    display: flex;
    gap: 32px;
    margin-top: 30px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--accent-blue);
}

.highlight-item svg {
    width: 20px;
    height: 20px;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-box {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.visual-box::before {
    content: '';
    position: absolute;
    inset: -10px;
    background: linear-gradient(135deg, var(--highlight-blue), transparent);
    border-radius: 24px;
    z-index: -1;
    opacity: 0.3;
}

.visual-icon {
    width: 80px;
    height: 80px;
    color: var(--white);
}

.visual-icon svg {
    width: 100%;
    height: 100%;
}

/* 发展历程 */
.timeline {
    background: var(--gray-100);
}

.timeline-list {
    position: relative;
    padding-left: 40px;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent-blue);
}

.timeline-item {
    position: relative;
    padding-left: 40px;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 4px;
    width: 24px;
    height: 24px;
    background: var(--accent-blue);
    border-radius: 50%;
    border: 4px solid var(--white);
    box-shadow: 0 0 0 4px rgba(74, 144, 217, 0.2);
}

.timeline-year {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 企业文化 */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-card {
    background: var(--gray-100);
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-normal);
}

.culture-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.culture-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--accent-blue);
}

.culture-icon svg {
    width: 100%;
    height: 100%;
}

.culture-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

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

/* 服务流程 */
.process-steps {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}

.process-step {
    text-align: center;
    max-width: 180px;
}

.step-number {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 12px;
}

.process-step h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.process-arrow {
    width: 40px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

.process-arrow svg {
    width: 100%;
}

/* 业务详情 */
.services-detail {
    padding: 60px 0;
}

.service-detail-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 40px;
    align-items: center;
    padding: 40px;
    background: var(--gray-100);
    border-radius: 20px;
}

.service-detail-card.reverse {
    grid-template-columns: 1fr 300px;
}

.detail-icon {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.detail-icon svg {
    width: 100%;
    height: 100%;
    padding: 20px;
}

.detail-content h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

.detail-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.detail-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.detail-features li {
    padding: 8px 20px;
    background: rgba(74, 144, 217, 0.1);
    color: var(--accent-blue);
    font-size: 14px;
    border-radius: 20px;
}

/* 案例筛选 */
.case-filter {
    padding: 30px 0;
    border-bottom: 1px solid var(--gray-200);
}

.filter-tabs {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tab.active,
.filter-tab:hover {
    background: var(--accent-blue);
    color: var(--white);
    border-color: var(--accent-blue);
}

/* 案例列表 */
.cases-grid-full {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card-item {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.case-card-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 200px;
    overflow: hidden;
}

.case-bg {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
}

.case-bg.blue {
    background: linear-gradient(135deg, #1e88e5, #1565c0);
}

.case-bg.green {
    background: linear-gradient(135deg, #43a047, #2e7d32);
}

.case-bg.purple {
    background: linear-gradient(135deg, #8e24aa, #6a1b9a);
}

.case-bg.orange {
    background: linear-gradient(135deg, #fb8c00, #ef6c00);
}

.case-bg.cyan {
    background: linear-gradient(135deg, #00acc1, #00838f);
}

.case-info {
    padding: 24px;
}

.case-info .case-category {
    margin-bottom: 12px;
}

.case-info .case-title {
    font-size: 18px;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.case-info .case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.case-readmore {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-blue);
    background: transparent;
    border: 1px solid var(--accent-blue);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.case-readmore:hover {
    background: var(--accent-blue);
    color: var(--white);
}

/* 客户评价 */
.testimonials {
    background: var(--gray-100);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--white);
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.testimonial-quote {
    width: 48px;
    height: 48px;
    background: rgba(74, 144, 217, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
    margin-bottom: 20px;
}

.testimonial-quote svg {
    width: 24px;
    height: 24px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    border-radius: 50%;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-dark);
}

.author-title {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 联系页面 */
.contact-content {
    padding: 80px 0;
}

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

.contact-form-wrapper h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 32px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.form-group {
    position: relative;
    margin-bottom: 24px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 0;
    font-family: var(--font-body);
    font-size: 15px;
    border: none;
    border-bottom: 2px solid var(--gray-200);
    background: transparent;
    transition: border-color var(--transition-fast);
    resize: none;
    appearance: none;
}

.form-group select {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23718096' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right center;
    padding-right: 30px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-group label {
    position: absolute;
    left: 0;
    top: 14px;
    font-size: 15px;
    color: var(--gray-600);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -8px;
    font-size: 12px;
    color: var(--accent-blue);
}

.btn-submit {
    width: 100%;
    margin-top: 16px;
}

.contact-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.info-section h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 32px;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-icon svg {
    width: 20px;
    height: 20px;
    color: var(--white);
}

.info-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.info-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--primary-dark);
}

.map-section h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.map-placeholder {
    background: var(--gray-100);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.map-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    color: var(--accent-blue);
}

.map-icon svg {
    width: 100%;
    height: 100%;
}

.map-placeholder p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 页脚 */
.footer {
    background: var(--primary-dark);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
}

.footer-tagline {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--highlight-blue);
}

.footer-contact {
    text-align: right;
}

.footer-phone {
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.footer-email {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* 弹窗 */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(10, 22, 40, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    padding: 48px;
    border-radius: 20px;
    text-align: center;
    max-width: 450px;
    width: 90%;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-blue);
    color: var(--white);
}

.modal-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent-blue), var(--primary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.modal-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.modal-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.modal-content p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* 案例详情弹窗 */
.case-modal {
    max-width: 600px;
    text-align: left;
    position: relative;
}

.case-modal-header {
    margin-bottom: 24px;
}

.modal-category {
    display: inline-block;
    padding: 6px 12px;
    background: var(--accent-blue);
    color: var(--white);
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    margin-bottom: 12px;
}

#modalTitle {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
}

.case-modal-body p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.case-modal-body h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 12px;
    margin-top: 24px;
}

.case-modal-body ul {
    padding-left: 20px;
}

.case-modal-body li {
    list-style: disc;
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* 响应式 */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cases-grid,
    .cases-grid-full,
    .testimonials-grid,
    .culture-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .intro-content,
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .service-detail-card,
    .service-detail-card.reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .detail-icon {
        margin: 0 auto 24px;
    }

    .detail-features {
        justify-content: center;
    }

    .process-steps {
        gap: 24px;
    }

    .process-arrow {
        display: none;
    }

    .process-step {
        max-width: 200px;
    }
}

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

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 80px 40px;
        gap: 32px;
        transition: right var(--transition-normal);
    }

    .nav-links.active {
        right: 0;
    }

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

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

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

    section {
        padding: 60px 0;
    }

    .page-header {
        padding: 100px 0 60px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .cases-grid,
    .cases-grid-full,
    .testimonials-grid,
    .culture-grid {
        grid-template-columns: 1fr;
    }

    .intro-stats,
    .about-highlights {
        flex-wrap: wrap;
        gap: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-contact {
        text-align: center;
    }

    .timeline-list {
        padding-left: 24px;
    }

    .timeline-list::before {
        left: 6px;
    }

    .timeline-item {
        padding-left: 30px;
    }

    .timeline-item::before {
        left: -24px;
        width: 20px;
        height: 20px;
    }

    .contact-form {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .stat-number {
        font-size: 32px;
    }
}