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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-full {
    width: 100%;
}

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

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-white);
    letter-spacing: 1px;
}

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

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    color: var(--text-white);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-dark);
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 40%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 14px;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease 0.3s both;
}

.visual-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 24px;
    width: 180px;
    transition: transform var(--transition-normal);
}

.visual-card:hover {
    transform: translateY(-5px);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation: float 3s ease-in-out infinite;
}

.card-2 {
    top: 45%;
    right: 10%;
    animation: float 3s ease-in-out infinite 1s;
}

.card-3 {
    bottom: 15%;
    left: 25%;
    animation: float 3s ease-in-out infinite 2s;
}

.card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.card-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.floating-circle {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.2;
    filter: blur(40px);
}

.circle-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    right: 20%;
    animation: pulse 4s ease-in-out infinite;
}

.circle-2 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 10%;
    animation: pulse 4s ease-in-out infinite 2s;
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255, 255, 255, 0.6);
    border-bottom: 2px solid rgba(255, 255, 255, 0.6);
    transform: rotate(45deg);
    margin: 10px auto 0;
}

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

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

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 0 auto 20px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

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

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

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-placeholder {
    width: 100%;
    height: 450px;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.placeholder-icon {
    font-size: 80px;
    margin-bottom: 20px;
}

.placeholder-text {
    font-size: 24px;
    font-weight: 600;
}

.about-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background: var(--text-white);
    padding: 24px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.badge-number {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.badge-text {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

.about-text {
    animation: fadeInRight 0.8s ease;
}

.about-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    line-height: 1.4;
}

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

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 32px 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text-dark);
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    flex-shrink: 0;
}

/* ===== 服务项目 ===== */
.services {
    background: var(--bg-white);
}

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

.service-card {
    position: relative;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.service-card.featured {
    background: var(--gradient-dark);
    color: white;
    border-color: transparent;
    transform: scale(1.05);
}

.service-card.featured:hover {
    transform: translateY(-10px) scale(1.05);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.service-icon {
    font-size: 48px;
    margin-bottom: 24px;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.service-card.featured .service-desc {
    color: rgba(255, 255, 255, 0.7);
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-list li {
    font-size: 14px;
    color: var(--text-light);
    padding-left: 20px;
    position: relative;
}

.service-card.featured .service-list li {
    color: rgba(255, 255, 255, 0.7);
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.service-card.featured .service-list li::before {
    color: var(--primary-light);
}

/* ===== 成功案例 ===== */
.cases {
    background: var(--bg-light);
}

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

.case-card {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.case-image {
    position: relative;
    height: 200px;
    background: var(--gradient-primary);
    overflow: hidden;
}

.case-category {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    z-index: 2;
}

.case-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-icon {
    font-size: 64px;
}

.case-content {
    padding: 30px;
}

.case-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.case-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.case-tags span {
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 12px;
}

/* ===== 合作伙伴 ===== */
.partners {
    background: var(--bg-white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.partner-item {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.partner-item:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.partner-logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.partner-item:hover .partner-logo {
    color: var(--primary-color);
}

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

.platform-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.platform-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 30px;
    background: var(--bg-light);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.platform-item:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.platform-icon {
    font-size: 32px;
}

.platform-name {
    font-size: 14px;
    color: var(--text-dark);
    font-weight: 500;
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--bg-dark);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.contact .section-title {
    color: var(--text-white);
}

.contact .section-subtitle {
    color: rgba(255, 255, 255, 0.6);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.contact-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 40px;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.info-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.info-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
}

.info-value {
    font-size: 18px;
    font-weight: 600;
}

.social-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.social-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

.social-link span {
    font-size: 20px;
}

.contact-form-wrapper {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
}

.form-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-white);
    font-size: 15px;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-dark);
    color: var(--text-white);
}

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

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-darker);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo .logo-text {
    color: var(--text-white);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

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

.footer-contact p {
    font-size: 14px;
    line-height: 2;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

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

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

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.2;
        transform: scale(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(1.1);
    }
}

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

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 44px;
    }
    
    .services-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-container,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero {
        padding-top: 100px;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .hero-visual {
        height: 400px;
        order: -1;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .services-grid,
    .cases-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card.featured {
        transform: none;
    }
    
    .service-card.featured:hover {
        transform: translateY(-10px);
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-badge {
        right: 20px;
        bottom: -20px;
        padding: 16px 24px;
    }
    
    .badge-number {
        font-size: 32px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .platform-grid {
        gap: 15px;
    }
    
    .platform-item {
        padding: 15px 20px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .scroll-down {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    .visual-card {
        width: 140px;
        padding: 16px;
    }
    
    .card-icon {
        font-size: 24px;
    }
    
    .card-title {
        font-size: 15px;
    }
    
    .card-desc {
        font-size: 12px;
    }
}

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

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