/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00d4ff;
    --primary-dark: #0099cc;
    --primary-light: #33ddff;
    --secondary-color: #0ea5e9;
    --accent-color: #a855f7;
    --accent-secondary: #ec4899;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #0a0e27;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    overflow-x: clip;
}

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

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* 英雄区 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
}

.animated-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* 网格线背景 - 科技感 */
.grid-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* 粒子效果 */
.particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(0, 212, 255, 0.8);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
    animation: particleFloat 10s infinite ease-in-out;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(50px);
        opacity: 0;
    }
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.circle-2 {
    width: 300px;
    height: 300px;
    top: 60%;
    right: 15%;
    animation-delay: 5s;
}

.circle-3 {
    width: 500px;
    height: 500px;
    bottom: -10%;
    left: 50%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-50px) rotate(180deg);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    animation: fadeInUp 1s ease-out;
}

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

/* 故障效果包装器 */
.glitch-wrapper {
    position: relative;
    display: inline-block;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.1;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5),
                 0 0 40px rgba(0, 212, 255, 0.3);
}

.title-line {
    display: block;
    animation: slideIn 0.8s ease-out forwards;
    opacity: 0;
}

.title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.title-line:nth-child(2) {
    animation-delay: 0.4s;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
    opacity: 0.9;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 数据统计 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    min-width: 120px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
}

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

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: -1;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 212, 255, 0.6);
}

.btn-full {
    width: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 36px;
    border: 2px solid white;
    border-radius: 12px;
    position: relative;
}

.scroll-indicator span::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(16px);
    }
}

/* 区块通用样式 */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-top: 20px;
}

/* 服务区 */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
}

.service-card.highlight {
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
    color: white;
    border: 1px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.service-card.highlight::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color), var(--accent-secondary), var(--primary-color));
    border-radius: 16px;
    z-index: -1;
    animation: gradientRotate 3s linear infinite;
    background-size: 300% 300%;
}

@keyframes gradientRotate {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.service-card.highlight .service-icon {
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.service-card.highlight .service-title,
.service-card.highlight .service-description,
.service-card.highlight .service-features li {
    color: white;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.service-card:hover .service-icon {
    transform: rotateY(360deg);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.5);
}

.service-icon svg {
    width: 36px;
    height: 36px;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.service-card.highlight .service-features li::before {
    color: white;
}

/* 项目案例 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.project-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
    pointer-events: none;
}

.project-card:hover::before {
    opacity: 1;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
}

.project-image {
    position: relative;
    height: 250px;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
    overflow: hidden;
}

.project-image::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.8;
    }
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.project-link:hover {
    transform: scale(1.2) rotate(90deg);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.8);
}

.project-link svg {
    width: 28px;
    height: 28px;
}

.project-content {
    padding: 30px;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tag {
    padding: 6px 14px;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.project-url {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.project-url:hover {
    color: var(--primary-dark);
}

/* 关于我们 */
.about {
    background: var(--bg-secondary);
}

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

.about-text .section-header {
    text-align: left;
    margin-bottom: 30px;
}

.about-text .section-title::after {
    left: 0;
    transform: none;
}

.about-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.05rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.feature-item {
    text-align: center;
    padding: 24px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.feature-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.feature-label {
    color: var(--text-secondary);
    font-weight: 500;
}

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

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.image-placeholder svg {
    width: 150px;
    height: 150px;
    opacity: 0.3;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

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

.info-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
}

.info-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.info-icon svg {
    width: 32px;
    height: 32px;
}

.info-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.info-card p a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.info-card p a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

/* 右侧悬浮挂件 */
.floating-sidebar {
    position: fixed;
    right: 20px;
    top: 50%;
    left: auto;
    bottom: auto;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    width: auto;
    max-width: 72px;
}

.float-item {
    box-sizing: border-box;
    width: 60px;
    height: 60px;
    min-width: 60px;
    min-height: 60px;
    max-width: 60px;
    max-height: 60px;
    flex: 0 0 60px;
    background: white;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.float-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.2), transparent);
    transition: left 0.5s;
}

.float-item:hover::before {
    left: 100%;
}

.float-item:hover {
    transform: translateX(-8px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.3);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
}

.float-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    max-width: 28px;
    max-height: 28px;
    flex: 0 0 28px;
    color: var(--primary-color);
    margin-bottom: 4px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.float-icon svg {
    width: 28px;
    height: 28px;
    max-width: 28px;
    max-height: 28px;
    display: block;
    flex-shrink: 0;
}

.float-text {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.float-item:hover .float-text {
    color: var(--primary-color);
}

/* 二维码弹窗 */
.qr-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.qr-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}

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

.qr-modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    max-width: 450px;
    width: 90%;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease-out;
}

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

.qr-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.qr-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.qr-modal-content h3 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.qr-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--border-color);
}

.qr-tab {
    flex: 1;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    font-size: 0.95rem;
}

.qr-tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: var(--transition);
}

.qr-tab.active {
    color: var(--primary-color);
}

.qr-tab.active::after {
    transform: scaleX(1);
}

.qr-tab:hover {
    color: var(--primary-color);
}

.qr-content {
    position: relative;
    min-height: 300px;
}

.qr-panel {
    display: none;
}

.qr-panel.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.qr-placeholder {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 2px dashed var(--border-color);
}

.qr-placeholder p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 500;
}

.qr-tip {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 如果有二维码图片 */
.qr-image {
    width: 100%;
    max-width: 280px;
    margin: 0 auto 20px;
    display: block;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.qr-info {
    text-align: center;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-top: 15px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-column h4 {
    margin-bottom: 16px;
    font-size: 1.125rem;
}

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

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin-bottom: 10px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: var(--primary-color);
}

.icp-info {
    font-size: 0.875rem;
    margin-top: 10px;
}

.icp-info a {
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 20px 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 15px 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

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

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-item {
        min-width: 100px;
    }

    .stat-number {
        font-size: 2rem;
    }

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

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

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

    .contact-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

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

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

    /* 悬浮挂件在平板上缩小，仍固定在右侧 */
    .floating-sidebar {
        right: 10px;
        left: auto;
        bottom: auto;
        top: 50%;
        transform: translateY(-50%);
        width: auto;
        max-width: 60px;
        flex-direction: column;
        background: transparent;
        padding: 0;
        box-shadow: none;
        border: none;
    }

    .float-item {
        width: 50px;
        height: 50px;
        min-width: 50px;
        min-height: 50px;
        max-width: 50px;
        max-height: 50px;
        flex: 0 0 50px;
        padding: 0;
        background: white;
        border: 1px solid var(--border-color);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        position: relative;
    }

    .float-icon {
        width: 22px;
        height: 22px;
        min-width: 22px;
        min-height: 22px;
        max-width: 22px;
        max-height: 22px;
        flex: 0 0 22px;
    }

    .float-icon svg {
        width: 22px;
        height: 22px;
        max-width: 22px;
        max-height: 22px;
    }

    .float-text {
        font-size: 10px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-stats {
        gap: 1rem;
    }

    .stat-item {
        min-width: 90px;
        padding: 0.75rem;
    }

    .stat-number {
        font-size: 1.75rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        padding: 0 20px;
    }

    .btn {
        width: 100%;
    }

    section {
        padding: 60px 0;
    }

    /* 手机端仍固定在右侧，避免底栏把无尺寸 SVG 撑到整屏 */
    .floating-sidebar {
        position: fixed;
        right: 8px;
        left: auto;
        bottom: auto;
        top: 50%;
        transform: translateY(-50%);
        width: auto;
        max-width: 56px;
        flex-direction: column;
        justify-content: flex-start;
        background: transparent;
        padding: 0;
        box-shadow: none;
        border: none;
        gap: 8px;
    }

    .float-item {
        width: 48px;
        height: 48px;
        min-width: 48px;
        min-height: 48px;
        max-width: 48px;
        max-height: 48px;
        flex: 0 0 48px;
        padding: 0;
        background: white;
        border: 1px solid var(--border-color);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
        position: relative;
    }

    .float-item:hover {
        transform: translateX(-6px);
        background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    }

    .float-icon {
        width: 20px;
        height: 20px;
        min-width: 20px;
        min-height: 20px;
        max-width: 20px;
        max-height: 20px;
        flex: 0 0 20px;
        margin-bottom: 2px;
    }

    .float-icon svg {
        width: 20px;
        height: 20px;
        max-width: 20px;
        max-height: 20px;
    }

    .float-text {
        font-size: 9px;
    }

    .qr-modal-content {
        padding: 30px 20px;
        width: 95%;
    }

    .qr-tab {
        font-size: 0.85rem;
        padding: 10px 8px;
    }

    .qr-image {
        max-width: 220px;
    }
}