/* ===== CSS变量 ===== */
:root {
    --primary-color: #ff6b6b;
    --primary-dark: #ee5a52;
    --secondary-color: #4ecdc4;
    --accent-color: #ffd93d;
    --dark: #2d3436;
    --darker: #1a1a1a;
    --light: #f8f9fa;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --gradient-1: linear-gradient(135deg, #ff6b6b 0%, #ff8e53 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --nav-width: 280px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    max-width: 100vw;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    overflow-x: hidden;
    line-height: 1.6;
    max-width: 100vw;
    position: relative;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.container-fluid {
    padding: 0 40px;
    max-width: 100%;
    overflow-x: hidden;
}

/* ===== 侧边导航 ===== */
.side-nav {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--nav-width);
    height: 100vh;
    background: var(--white);
    box-shadow: 2px 0 20px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    padding: 30px 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-logo {
    padding: 0 30px;
    margin-bottom: 40px;
}

.nav-logo img {
    max-width: 180px;
}

.nav-menu {
    flex: 1;
    padding: 0 20px;
}

.nav-menu li {
    margin-bottom: 5px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.nav-menu a i {
    font-size: 20px;
    margin-right: 15px;
    width: 24px;
    text-align: center;
}

.nav-menu a span {
    font-size: 15px;
    font-weight: 500;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--gradient-1);
    color: var(--white);
}

.nav-menu a::before {
    content: attr(data-text);
    position: absolute;
    left: -100%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 60px;
    font-weight: 900;
    color: rgba(255,255,255,0.1);
    transition: var(--transition);
}

.nav-menu a:hover::before {
    left: 50%;
    transform: translate(-50%, -50%);
}

.nav-contact {
    padding: 0 20px;
    margin-top: 20px;
}

.contact-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--gradient-1);
    color: var(--white);
    padding: 15px 20px;
    border-radius: 25px;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.4);
}

.nav-toggle {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
    transition: var(--transition);
}

.nav-toggle:hover {
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* 汉堡菜单激活状态动画 */
.nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* 导航遮罩层 */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* ===== 主内容区 ===== */
.main-content {
    margin-left: var(--nav-width);
    min-height: 100vh;
    overflow-x: hidden;
    max-width: 100%;
}

/* ===== Hero 区域 ===== */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    overflow: hidden;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    padding: 0 40px;
}

.hero-text {
    flex: 1;
    color: var(--white);
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
}

.hero-title .line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

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

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

.hero-title .line:nth-child(3) {
    animation-delay: 0.6s;
}

.hero-title .highlight {
    background: linear-gradient(90deg, #ffd93d, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: 0 5px 20px rgba(255,255,255,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,255,255,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.hero-image {
    position: relative;
    width: 400px;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 15px;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 32px;
    color: var(--primary-color);
}

.floating-card p {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
}

.floating-card.card-1 {
    top: 50px;
    left: 0;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 200px;
    right: 0;
    animation-delay: 1s;
}

.floating-card.card-3 {
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--white);
    z-index: 2;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 15px;
    margin: 0 auto 10px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 10px;
    background: var(--white);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 25px; }
}

/* ===== 波浪分隔 ===== */
.wave-divider {
    position: relative;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    margin-top: -1px;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
    fill: var(--white);
}

/* ===== 通用板块样式 ===== */
section {
    padding: 100px 0;
}

.section-label {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(255,107,107,0.1), rgba(255,142,83,0.1));
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

/* ===== 关于我们 - 分屏布局 ===== */
.about-section {
    background: var(--light);
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.split-left {
    position: relative;
}

.about-image {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.stats-overlay {
    position: absolute;
    bottom: -40px;
    right: -40px;
    background: var(--white);
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 14px;
    color: var(--text-light);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 28px;
    color: var(--white);
}

.feature-content h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark);
}

.feature-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 六边形网格布局 ===== */
.problems-section {
    background: var(--white);
}

.hexagon-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.hex-item {
    position: relative;
    aspect-ratio: 1;
}

.hex-content {
    height: 100%;
    padding: 40px 30px;
    background: linear-gradient(135deg, var(--light) 0%, var(--white) 100%);
    border: 2px solid #f0f0f0;
    border-radius: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    cursor: pointer;
}

.hex-content:hover {
    background: var(--gradient-1);
    border-color: transparent;
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255,107,107,0.3);
}

.hex-content:hover i,
.hex-content:hover h4,
.hex-content:hover p {
    color: var(--white);
}

.hex-content i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: var(--transition);
}

.hex-content h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark);
    transition: var(--transition);
}

.hex-content p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    transition: var(--transition);
}

/* ===== 3D翻转卡片 ===== */
.services-section {
    background: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.service-card-3d {
    perspective: 1000px;
    height: 350px;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.service-card-3d:hover .card-inner {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.card-front {
    background: var(--white);
}

.card-back {
    background: var(--gradient-1);
    color: var(--white);
    transform: rotateY(180deg);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon i {
    font-size: 36px;
    color: var(--white);
}

.card-front h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--dark);
    text-align: center;
}

.card-front p {
    color: var(--text-light);
    text-align: center;
    line-height: 1.6;
}

.card-back h4 {
    font-size: 22px;
    margin-bottom: 25px;
}

.card-back ul {
    list-style: none;
    margin-bottom: 25px;
    width: 100%;
}

.card-back ul li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-back ul li i {
    color: var(--accent-color);
}

.service-btn {
    padding: 12px 30px;
    background: var(--white);
    color: var(--primary-color);
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
}

.service-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(255,255,255,0.3);
}

/* ===== 环形流程 ===== */
.process-section {
    background: var(--white);
}

.circular-process {
    margin-top: 80px;
    display: flex;
    justify-content: center;
}

.process-circle {
    position: relative;
    width: 600px;
    height: 600px;
}

.center-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background: var(--gradient-1);
    color: var(--white);
    width: 200px;
    height: 200px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 40px rgba(255,107,107,0.3);
}

.center-content i {
    font-size: 48px;
    margin-bottom: 15px;
}

.center-content h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.step-item {
    position: absolute;
    width: 160px;
    padding: 20px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.step-item:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-content h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--dark);
}

.step-content p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.4;
}

/* 定位各个步骤 */
.step-1 { top: 0; left: 50%; transform: translateX(-50%); }
.step-2 { top: 20%; right: 0; }
.step-3 { bottom: 20%; right: 0; }
.step-4 { bottom: 0; left: 50%; transform: translateX(-50%); }
.step-5 { bottom: 20%; left: 0; }
.step-6 { top: 20%; left: 0; }

/* ===== 瀑布流布局 ===== */
.cases-section {
    background: var(--light);
}

.masonry-grid {
    column-count: 3;
    column-gap: 30px;
    margin-top: 60px;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 30px;
}

.case-card {
    background: var(--white);
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.case-card .avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
}

.case-card .info {
    flex: 1;
}

.case-card .info h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--dark);
}

.case-card .info p {
    font-size: 13px;
    color: var(--text-light);
}

.case-card .rating {
    color: #ffd700;
}

.case-card > p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== 团队轮播 ===== */
.team-section {
    background: var(--white);
}

.team-swiper {
    margin-top: 60px;
    padding: 40px 0;
}

.team-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.team-image {
    position: relative;
    overflow: hidden;
    height: 350px;
}

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

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

.team-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,107,107,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.consult-btn {
    padding: 15px 35px;
    background: var(--white);
    color: var(--primary-color);
    border-radius: 25px;
    font-weight: 600;
}

.team-info {
    padding: 30px;
    text-align: center;
}

.team-info h4 {
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--dark);
}

.team-info .role {
    display: inline-block;
    padding: 5px 15px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 15px;
    font-size: 13px;
    margin-bottom: 15px;
}

.team-info p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 14px;
}

/* ===== 新闻资讯 ===== */
.news-section {
    background: var(--light);
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 40px 0;
}

.tab-btn {
    padding: 12px 30px;
    background: var(--white);
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--gradient-1);
    color: var(--white);
    border-color: transparent;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card.featured {
    grid-column: 1 / -1;
    flex-direction: row;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.news-image {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.news-card.featured .news-image {
    width: 50%;
    height: auto;
}

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

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

.news-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 8px 20px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.news-content {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.news-meta .category {
    padding: 5px 15px;
    background: var(--gradient-1);
    color: var(--white);
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.news-meta .date {
    color: var(--text-light);
    font-size: 13px;
}

.news-content h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content > p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 15px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.read-more:hover {
    gap: 10px;
}

/* ===== CTA区域 ===== */
.cta-section {
    position: relative;
    padding: 120px 0;
    background: var(--gradient-2);
    color: var(--white);
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.05)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,133.3C960,128,1056,96,1152,80C1248,64,1344,64,1392,64L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: bottom;
    opacity: 0.3;
}

.cta-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.cta-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
}

.cta-content > p {
    font-size: 20px;
    margin-bottom: 50px;
    opacity: 0.95;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 50px;
}

.cta-item {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 18px;
    font-weight: 600;
}

.cta-item i {
    font-size: 32px;
}

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

.btn-light {
    background: var(--white);
    color: var(--primary-color);
}

.btn-outline-light {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* ===== 页脚 ===== */
.footer {
    background: var(--darker);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h4 {
    font-size: 20px;
    margin-bottom: 25px;
}

.footer-col p {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,0.7);
}

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

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

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

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(255,107,107,0.4);
    z-index: 998;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(255,107,107,0.5);
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* AOS 动画 */
[data-aos] {
    opacity: 0;
    transition-property: transform, opacity;
}

[data-aos].aos-animate {
    opacity: 1;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    :root {
        --nav-width: 0;
    }
    
    .side-nav {
        width: 300px;
        transform: translateX(-100%);
        box-shadow: 4px 0 30px rgba(0,0,0,0.2);
    }
    
    .side-nav.active {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .split-layout,
    .services-grid,
    .hexagon-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 防止滚动 */
    body.nav-open {
        overflow: hidden;
    }
}

@media (max-width: 768px) {
    .side-nav {
        width: 280px;
        max-width: 80vw;
    }
    
    .nav-logo {
        padding: 0 20px;
        margin-bottom: 30px;
    }
    
    .nav-logo img {
        max-width: 150px;
    }
    
    .nav-menu {
        padding: 0 15px;
    }
    
    .nav-menu a {
        padding: 12px 15px;
    }
    
    .nav-contact {
        padding: 0 15px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .nav-toggle {
        right: 20px;
        top: 20px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        padding: 0 20px;
    }
    
    .hero-image {
        display: none;
    }
    
    .hero-buttons {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .btn {
        padding: 15px 30px;
        font-size: 15px;
    }
    
    .split-layout,
    .services-grid,
    .hexagon-grid,
    .masonry-grid,
    .news-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .news-card.featured {
        flex-direction: column;
    }
    
    .news-card.featured .news-image {
        width: 100%;
        height: 220px;
    }
    
    .stats-overlay {
        position: static;
        margin-top: 20px;
        flex-direction: column;
        gap: 20px;
    }
    
    .process-circle {
        width: 400px;
        height: 400px;
    }
    
    .center-content {
        width: 150px;
        height: 150px;
    }
    
    .step-item {
        width: 120px;
        padding: 15px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .cta-content h2 {
        font-size: 32px;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .side-nav {
        width: 260px;
        max-width: 75vw;
    }
    
    .nav-logo {
        padding: 0 15px;
        margin-bottom: 25px;
    }
    
    .nav-logo img {
        max-width: 130px;
    }
    
    .nav-menu {
        padding: 0 10px;
    }
    
    .nav-menu a {
        padding: 10px 12px;
        font-size: 14px;
    }
    
    .nav-menu a i {
        font-size: 18px;
        margin-right: 10px;
    }
    
    .nav-toggle {
        width: 40px;
        height: 40px;
        top: 10px;
        right: 10px;
    }
    
    .nav-toggle span {
        width: 20px;
        height: 2.5px;
    }
    
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        padding: 14px 25px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .section-subtitle {
        font-size: 15px;
    }
    
    .masonry-grid {
        column-count: 1;
    }
    
    .process-circle {
        width: 300px;
        height: 300px;
    }
    
    .center-content {
        width: 100px;
        height: 100px;
    }
    
    .center-content i {
        font-size: 32px;
    }
    
    .center-content h3 {
        font-size: 14px;
    }
    
    .center-content p {
        font-size: 11px;
    }
    
    .step-item {
        width: 90px;
        padding: 8px;
    }
    
    .step-number {
        width: 28px;
        height: 28px;
        line-height: 28px;
        font-size: 11px;
        margin-bottom: 8px;
    }
    
    .step-content h4 {
        font-size: 12px;
        margin-bottom: 5px;
    }
    
    .step-content p {
        font-size: 10px;
    }
    
    .contact-btn {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .cta-content h2 {
        font-size: 26px;
    }
    
    .cta-content > p {
        font-size: 15px;
    }
}