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

:root {
    --primary-color: #00d4ff;
    --secondary-color: #7b2ff7;
    --accent-color: #ff2e63;
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0d0;
    --text-muted: #707090;
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7b2ff7 100%);
    --gradient-secondary: linear-gradient(135deg, #7b2ff7 0%, #ff2e63 100%);
    --gradient-dark: linear-gradient(180deg, rgba(10, 10, 26, 0.8) 0%, rgba(18, 18, 42, 0.95) 100%);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
    --transition-speed: 0.3s;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* ========== 粒子背景 ========== */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 20s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-speed);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.navbar.scrolled {
    background: rgba(10, 10, 26, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-speed);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

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

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

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition-speed);
}

/* ========== 首页Hero区域 ========== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, var(--bg-primary) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.title-line {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideUp 1s ease-out;
}

.title-line:nth-child(2) {
    animation-delay: 0.3s;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    animation: fadeIn 1.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: none;
    display: inline-block;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

.btn-submit {
    width: 100%;
    background: var(--gradient-primary);
    color: var(--text-primary);
    font-size: 1.1rem;
    padding: 1rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition-speed);
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: block;
    margin-top: 0.5rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-secondary);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 6px;
    height: 10px;
    background: var(--text-secondary);
    border-radius: 3px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% {
        opacity: 1;
        top: 10px;
    }
    50% {
        opacity: 0;
        top: 25px;
    }
}

/* ========== 服务介绍轮播 ========== */
.services-carousel {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.carousel-container {
    position: relative;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    gap: 2rem;
    transition: transform 0.5s ease;
}

.service-card {
    flex: 0 0 calc(25% - 1.5rem);
    background: var(--bg-tertiary);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-speed);
    z-index: 0;
}

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

.service-card:hover::before {
    opacity: 0.05;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

.service-features {
    list-style: none;
    position: relative;
    z-index: 1;
}

.service-features li {
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 0.3rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.carousel-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--primary-color);
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-speed);
}

.carousel-btn:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

/* ========== 快速入口 ========== */
.quick-links-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.quick-link-card {
    background: var(--bg-tertiary);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.quick-link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-speed);
    z-index: 0;
}

.quick-link-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.quick-link-card:hover::before {
    opacity: 0.05;
}

.quick-link-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.quick-link-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.quick-link-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* ========== 关于我们 ========== */
.about-section {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
    z-index: 1;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.about-intro h3,
.about-team h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-intro p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-highlight {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.highlight-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.team-member {
    text-align: center;
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: var(--transition-speed);
}

.team-member:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.member-avatar {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.team-member h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.team-member p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.timeline {
    margin-top: 4rem;
}

.timeline h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.timeline-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

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

.timeline-year {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========== 研究案例 ========== */
.cases-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.8rem 2rem;
    border-radius: 30px;
    background: var(--bg-tertiary);
    border: 2px solid rgba(0, 212, 255, 0.3);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-speed);
    font-size: 0.95rem;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.case-item {
    background: var(--bg-tertiary);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-speed);
}

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary-color);
}

.case-image {
    height: 250px;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.case-placeholder {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-speed);
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-preview-btn {
    padding: 1rem 2rem;
    border-radius: 30px;
    background: var(--gradient-primary);
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-speed);
}

.case-preview-btn:hover {
    transform: scale(1.1);
}

.case-info {
    padding: 1.5rem;
}

.case-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.case-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.case-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    padding: 0.3rem 0.8rem;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

/* ========== 全景预览模态框 ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-tertiary);
    border-radius: 20px;
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h3 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.close-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-speed);
}

.close-btn:hover {
    background: var(--accent-color);
}

.modal-body {
    padding: 1.5rem;
}

.panorama-container {
    height: 500px;
    background: var(--bg-secondary);
    border-radius: 15px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.panorama-placeholder {
    text-align: center;
}

.panorama-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.panorama-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.control-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-speed);
}

.control-btn:hover {
    background: var(--primary-color);
}

/* ========== 我们优势 ========== */
.advantages-section {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
    z-index: 1;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.advantage-card {
    background: var(--bg-tertiary);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-speed);
    transform: rotate(45deg);
}

.advantage-card:hover::before {
    opacity: 0.03;
}

.advantage-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.advantage-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.advantage-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.advantage-stat {
    position: relative;
    z-index: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-unit {
    color: var(--text-secondary);
    margin-left: 0.2rem;
}

.data-statistics {
    background: var(--bg-tertiary);
    border-radius: 20px;
    padding: 3rem;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.data-statistics h3 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-box {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: var(--transition-speed);
}

.stat-box:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.stat-box .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-box .stat-label {
    color: var(--text-secondary);
}

/* ========== 文章信息 ========== */
.articles-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: var(--bg-tertiary);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all var(--transition-speed);
}

.article-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary-color);
}

.article-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.article-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.article-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.article-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.article-link:hover {
    text-decoration: underline;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.pagination button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-speed);
}

.pagination button:hover,
.pagination button.active {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
}

/* ========== 联系我们 ========== */
.contact-section {
    padding: 6rem 0;
    background: var(--bg-primary);
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3,
.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.contact-details p {
    color: var(--text-secondary);
}

.map-container {
    margin-top: 2rem;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.map-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

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

.map-image:hover img {
    transform: scale(1.05);
}

.map-overlay {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(5px);
    border-radius: 10px;
    padding: 12px 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.map-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.map-link:hover {
    color: white;
    transform: translateY(-2px);
}

.map-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    padding: 0 1rem;
}

.contact-form {
    background: var(--bg-tertiary);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-secondary);
    padding: 4rem 0 1rem;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-about h3,
.footer-links h3,
.footer-services h3,
.footer-contact h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-about p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: var(--transition-speed);
}

.social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

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

.footer-links li,
.footer-services li,
.footer-contact li {
    margin-bottom: 0.8rem;
}

.footer-links a,
.footer-services li {
    color: var(--text-secondary);
    transition: var(--transition-speed);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-contact li {
    color: var(--text-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========== 回到顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-speed);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .service-card {
        flex: 0 0 calc(33.333% - 1.33rem);
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-tertiary);
        flex-direction: column;
        padding: 5rem 2rem;
        transition: 0.3s;
        gap: 1.5rem;
    }

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

    .mobile-menu-btn {
        display: flex;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .service-card {
        flex: 0 0 calc(50% - 1rem);
    }

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

    .cases-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }

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

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

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

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .service-card {
        flex: 0 0 100%;
    }

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

    .timeline-items {
        grid-template-columns: 1fr;
    }

    .carousel-track {
        flex-direction: column;
    }
}

/* ========== 动画效果 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* 滚动显示 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 页面标题 ========== */
.page-header {
    padding: 8rem 0 4rem;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* ========== 企业文化 ========== */
.culture-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.culture-item {
    background: var(--bg-tertiary);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: var(--transition-speed);
}

.culture-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.culture-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.culture-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.culture-item p {
    color: var(--text-secondary);
}