/* ========================================
   现代化网站样式 - 若溪科技
   采用玻璃态、渐变、流体动画等现代设计
   ======================================== */

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

/* ===== CSS 变量 ===== */
:root {
    /* 渐变色系 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warm: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-cool: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    
    /* 纯色 */
    --primary: #667eea;
    --secondary: #764ba2;
    --accent: #4facfe;
    
    /* 文字颜色 */
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --text-white: #ffffff;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-dark: #1a202c;
    
    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.25);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-colored: 0 8px 32px rgba(102, 126, 234, 0.25);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡动画 */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===== 全局样式 ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 动态背景 ===== */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #f7fafc 0%, #ffffff 100%);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 25s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    top: -300px;
    right: -300px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--gradient-accent);
    bottom: -250px;
    left: -250px;
    animation-delay: 7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--gradient-warm);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(80px, -80px) scale(1.1);
    }
    66% {
        transform: translate(-80px, 80px) scale(0.9);
    }
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    z-index: 1000;
    transition: var(--transition-base);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: var(--transition-base);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

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

.cta-button {
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-colored);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.35);
}

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

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

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* ===== 英雄区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    position: relative;
}

.hero .container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 80px;
    width: 100%;
}

.hero-content {
    max-width: 650px;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge i {
    font-size: 16px;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    outline: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(102, 126, 234, 0.4);
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-stats .stat-item {
    text-align: left;
}

.hero-stats .stat-number {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 4px;
}

.hero-stats .stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.hero-visual {
    position: relative;
    width: 30%;
    height: 500px;
    animation: fadeIn 1s ease-out 0.4s both;
    z-index: 1;
}

.floating-card {
    position: absolute;
    padding: 18px 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    animation: floatCard 6s ease-in-out infinite;
    white-space: nowrap;
    min-width: max-content;
}

.floating-card i {
    font-size: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex-shrink: 0;
}

.card-1 {
    top: 5%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: -10%;
    transform: translateY(-50%);
    animation-delay: 2s;
}

.card-3 {
    bottom: 8%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 4s;
}

.hero-circle {
    position: absolute;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    width: 450px;
    height: 450px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.08;
    filter: blur(80px);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% {
        transform: translate(var(--float-x, 0), 0) scale(1);
    }
    50% {
        transform: translate(var(--float-x, 0), -12px) scale(1.02);
    }
}

.card-1 {
    --float-x: -50%;
}

.card-2 {
    --float-x: 0;
}

.card-3 {
    --float-x: -50%;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.15;
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeIn 1s ease-out 1s both;
}

.scroll-indicator span {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(-45deg);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: rotate(-45deg) translateY(0);
    }
    50% {
        transform: rotate(-45deg) translateY(10px);
    }
}

/* ===== 通用动画 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* 玻璃卡片效果 */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.about-card {
    padding: 32px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-base);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.about-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    padding: 48px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

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

.feature-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.feature-label {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

/* ===== 服务区域 ===== */
.services {
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.service-card {
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
    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-base);
    z-index: -1;
}

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

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

.service-icon-wrapper {
    margin-bottom: 24px;
}

.service-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    transition: var(--transition-bounce);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.service-card > p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.service-features i {
    color: var(--primary);
    font-size: 12px;
}

.service-hover-effect {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-base);
}

.service-card:hover .service-hover-effect {
    transform: scaleX(1);
}

/* ===== 作品集区域 ===== */
.portfolio {
    background: var(--bg-secondary);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: white;
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
}

.filter-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-colored);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.portfolio-item {
    animation: fadeInUp 0.6s ease-out both;
}

.portfolio-item:nth-child(1) {
    animation-delay: 0.1s;
}

.portfolio-item:nth-child(2) {
    animation-delay: 0.2s;
}

.portfolio-item:nth-child(3) {
    animation-delay: 0.3s;
}

.portfolio-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 280px;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.portfolio-tags {
    position: absolute;
    top: 16px;
    left: 16px;
    display: flex;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
}

.portfolio-content {
    padding: 28px;
}

.portfolio-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.portfolio-content p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.portfolio-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.meta-item i {
    color: var(--primary);
}

.portfolio-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.portfolio-link i {
    font-size: 12px;
}

/* ===== 联系我们区域 ===== */
.contact {
    background: white;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    padding: 28px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.info-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    margin-bottom: 16px;
}

.info-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.info-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 4px 0;
}

.info-note {
    font-size: 13px !important;
    color: var(--text-light) !important;
    font-style: italic;
}

.social-connect {
    padding: 28px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

.social-connect h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-colored);
}

.contact-form {
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--text-primary);
}

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

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

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group label i {
    color: var(--primary);
    font-size: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    transition: var(--transition-base);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    position: relative;
    padding-top: 80px;
}

.footer-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    overflow: hidden;
    line-height: 0;
}

.footer-wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
    color: var(--bg-dark);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    background: var(--gradient-primary);
}

.footer-logo .logo-text {
    font-size: 24px;
    font-weight: 700;
    color: white;
    background: none;
    -webkit-text-fill-color: white;
}

.footer-desc {
    font-size: 15px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}

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

.footer-social .social-link {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.footer-social .social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-4px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition-base);
    display: inline-block;
}

.footer-column a:hover {
    color: white;
    transform: translateX(4px);
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.contact-list i {
    color: var(--primary);
    margin-top: 2px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 0;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copyright {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-copyright p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-copyright a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.footer-badges {
    display: flex;
    gap: 16px;
}

.badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

.badge i {
    color: var(--primary);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-colored);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.4);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 100px 0 60px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    /* 导航栏优化 */
    .navbar {
        padding: 16px 0;
    }

    .navbar.scrolled {
        padding: 12px 0;
    }

    .nav-container {
        padding: 0 20px;
    }

    /* Logo 优化 */
    .logo-text {
        font-size: 15px;
        white-space: nowrap;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 40px 0;
        gap: 24px;
        transition: var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

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

    .cta-button {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 100px 0 80px;
    }

    .hero-title {
        font-size: 32px;
        line-height: 1.3;
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 15px;
        line-height: 1.6;
        margin-bottom: 32px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 12px;
        margin-bottom: 48px;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
        font-size: 15px;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
        text-align: center;
        padding: 0 16px;
        margin-bottom: 60px;
    }

    .stat-item {
        padding: 20px 8px;
    }

    .stat-number {
        font-size: 32px;
        margin-bottom: 6px;
    }

    .stat-label {
        font-size: 12px;
        line-height: 1.3;
    }

    /* 滚动指示器调整 */
    .scroll-indicator {
        bottom: 20px;
    }

    .scroll-indicator span {
        font-size: 10px;
    }

    .scroll-arrow {
        width: 20px;
        height: 20px;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 16px;
    }

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

    .about-features {
        grid-template-columns: repeat(2, 1fr);
        padding: 32px 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 28px 20px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    /* Logo 进一步优化 */
    .logo-text {
        font-size: 14px;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .hero {
        padding: 90px 0 70px;
    }

    .hero-title {
        font-size: 26px;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 0 12px;
        margin-bottom: 50px;
    }

    .stat-item {
        padding: 16px 6px;
    }

    .stat-number {
        font-size: 28px;
        margin-bottom: 4px;
    }

    .stat-label {
        font-size: 11px;
        line-height: 1.2;
    }

    /* 滚动指示器进一步调整 */
    .scroll-indicator {
        bottom: 15px;
    }

    .scroll-indicator span {
        font-size: 9px;
    }

    .scroll-arrow {
        width: 18px;
        height: 18px;
    }

    .section-badge {
        font-size: 11px;
    }

    .section-title {
        font-size: 26px;
    }

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

    .service-card,
    .portfolio-card {
        padding: 24px;
    }

    .footer-badges {
        flex-direction: column;
        width: 100%;
    }

    .badge {
        justify-content: center;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .hero-visual,
    .scroll-indicator,
    .back-to-top,
    .animated-background {
        display: none;
    }

    body {
        background: white;
    }

    section {
        page-break-inside: avoid;
    }
}

/* ===== 辅助类 ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 40px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 40px; }

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-secondary);
}

/* ===== 选择文本样式 ===== */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}