/* ========================================
   健励信息 - 现代官网样式表
   ======================================== */

/* CSS 变量 - 主题色系 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #0ea5e9;
    --accent-light: #38bdf8;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --success: #10b981;
    --gradient: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
    --gradient-dark: linear-gradient(135deg, #1a3a5f 0%, #0f172a 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1d4ed8 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
    --shadow-xl: 0 24px 64px rgba(0,0,0,0.15);
    --shadow-blue: 0 8px 32px rgba(37, 99, 235, 0.15);
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 顶部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark);
}

.logo-icon svg {
    width: 38px;
    height: 38px;
}

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-list a {
    display: block;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    position: relative;
}

.nav-list a:hover {
    color: var(--primary);
    background: var(--gray-50);
}

.nav-list a.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
}

.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: all var(--transition);
}

.header-spacer {
    height: 68px;
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 80px 0 100px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #34d399;
    border-radius: 50%;
    box-shadow: 0 0 12px #34d399;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--white);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    color: var(--primary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--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, 0.6);
    color: var(--white);
    transform: translateY(-2px);
}

/* Hero 底部波浪 */
.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    z-index: 1;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
    display: block;
}

/* ===== 通用 Section ===== */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--gray-50);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ===== 服务卡片 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.service-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--white);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--white);
}

.service-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.service-card .short-desc {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== 统计数据 ===== */
.stats-section {
    background: var(--gradient-hero);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-number {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffffff 0%, #93c5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
    line-height: 1.3;
}

.about-text .about-intro {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.about-feature svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--primary);
    margin-top: 2px;
}

.about-feature span {
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 500;
}

.about-visual {
    position: relative;
}

.about-visual-card {
    background: var(--gradient);
    border-radius: var(--radius-xl);
    padding: 40px;
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.about-visual-card .card-label {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.about-visual-card .card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-visual-card .card-text {
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 24px;
}

.about-visual-card .card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.about-visual-card .card-tag {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    font-size: 0.8rem;
}

/* ===== 新闻列表 ===== */
.news-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}

.news-tab {
    padding: 8px 24px;
    border: 2px solid var(--gray-200);
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition);
    background: none;
}

.news-tab.active,
.news-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.news-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-date {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-date::before {
    content: '';
    width: 3px;
    height: 12px;
    background: var(--gradient);
    border-radius: 2px;
}

.news-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card:hover h3 {
    color: var(--primary);
}

.news-summary {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    flex: 1;
}

.news-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}

.news-card:hover .news-link {
    gap: 10px;
}

/* ===== 成功案例 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.case-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: transparent;
}

.case-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: var(--gradient);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
}

.case-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.case-client {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 8px;
}

.case-desc {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 12px;
}

.case-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.case-tag {
    padding: 2px 10px;
    background: var(--gray-100);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
}

.contact-info > p {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-list svg {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.contact-list .label {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 2px;
}

.contact-list .value {
    font-size: 1.05rem;
    color: var(--dark);
    font-weight: 600;
}

/* 联系表单 */
.contact-form {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

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

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--gradient);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

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

.form-message {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.9rem;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ===== 页面 Banner ===== */
.page-banner {
    background: var(--gradient-hero);
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.page-banner h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.page-banner p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
    z-index: 1;
}

/* ===== 文章详情 ===== */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--gray-500);
}

.article-detail h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.4;
    margin-bottom: 24px;
}

.article-content {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--gray-700);
}

.article-content p {
    margin-bottom: 16px;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.article-nav a {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500;
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: var(--gradient-hero);
    padding: 64px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-section p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.cta-actions {
    position: relative;
    z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 64px 0 0;
}

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

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-brand .footer-logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
}

.footer-slogan {
    font-size: 0.95rem;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.footer-desc {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.6;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    font-size: 0.9rem;
    color: var(--gray-400);
}

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

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-contact svg {
    flex-shrink: 0;
    color: var(--gray-500);
    margin-top: 2px;
}

.footer-contact span {
    font-size: 0.9rem;
    color: var(--gray-400);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-bottom: 4px;
}

.footer-bottom a {
    color: var(--gray-600);
}

.footer-bottom a:hover {
    color: var(--gray-400);
}

/* ===== 动画 ===== */
.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

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

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

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

/* 响应式动画 */
@media (min-width: 768px) {
    .animate-on-scroll {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }

    .animate-on-scroll.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .services-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        min-height: 480px;
        padding: 60px 0 80px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: 48px 0;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-header {
        margin-bottom: 32px;
    }
    
    .services-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .page-banner h1 {
        font-size: 1.75rem;
    }
    
    .cta-section h2 {
        font-size: 1.5rem;
    }
    
    /* 移动端导航 */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-list {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    
    .nav-list.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list li {
        width: 100%;
    }
    
    .nav-list a {
        width: 100%;
        padding: 12px 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .case-card {
        flex-direction: column;
    }
}